U.S. patent application number 12/246375 was filed with the patent office on 2009-01-29 for multimedia system and server and methods for use therewith.
Invention is credited to Indra Laksono.
Application Number | 20090031419 12/246375 |
Document ID | / |
Family ID | 40296558 |
Filed Date | 2009-01-29 |
United States Patent
Application |
20090031419 |
Kind Code |
A1 |
Laksono; Indra |
January 29, 2009 |
MULTIMEDIA SYSTEM AND SERVER AND METHODS FOR USE THEREWITH
Abstract
A multimedia server receives a plurality of programs of a
multimedia source. The multimedia server includes a tuning module
to receive the plurality of programs and to select a set of
programs from the plurality of programs based on a set of program
select commands that is derived from select requests. A program
mixer mixes the set of programs into a stream of program data. One
or more transceiving modules transmit the stream of program data on
to corresponding communication paths and receive the select
requests. A client module produces the select requests for one or
more clients. The client module includes a selection module to
produce at least one of the select requests. A network interface
controller transmits at least one of select requests to the
multimedia server and receives the stream of program data via the
communication path or paths in response.
Inventors: |
Laksono; Indra; (Richmond
Hill, CA) |
Correspondence
Address: |
Timothy W. Markison
P.O. Box 342019
Austin
TX
78734
US
|
Family ID: |
40296558 |
Appl. No.: |
12/246375 |
Filed: |
October 6, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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09865136 |
May 24, 2001 |
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12246375 |
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Current U.S.
Class: |
726/21 ;
709/203 |
Current CPC
Class: |
H04N 21/6175 20130101;
H04N 21/43615 20130101; H04N 21/47202 20130101; H04N 7/163
20130101; H04N 21/64322 20130101; H04N 21/44 20130101; H04N 21/6168
20130101; H04N 21/43637 20130101; H04N 21/4383 20130101; H04N
21/4532 20130101; H04N 21/2143 20130101; H04N 21/234 20130101; H04N
21/4363 20130101; H04N 21/41407 20130101; H04N 21/4826 20130101;
H04N 21/234309 20130101; H04N 21/234363 20130101; H04N 21/6587
20130101; H04N 21/4126 20130101; H04N 21/4542 20130101; H04N
21/6181 20130101; H04N 21/25816 20130101; H04N 21/21 20130101; H04N
21/440263 20130101; H04N 21/2393 20130101; H04N 21/472 20130101;
H04N 21/23 20130101; H04N 21/25875 20130101 |
Class at
Publication: |
726/21 ;
709/203 |
International
Class: |
G06F 15/16 20060101
G06F015/16; G06F 12/14 20060101 G06F012/14 |
Claims
1. A multimedia system comprising: a multimedia server operably
coupled to receive a plurality of programs of a multimedia source,
wherein the multimedia server includes: a tuning module operably
coupled to receive the plurality of programs and to select a set of
programs from the plurality of programs based on a set of program
select commands that is derived from select requests; a program
mixer operably coupled to mix the set of programs into a stream of
program data; and a first transceiving module operably coupled to
transmit the stream of program data on to a first communication
path and to receive the select requests; a second transceiving
module operably coupled to transmit the stream of program data via
a second communication path; and a client module that produces the
select requests for at least one of a plurality of clients, wherein
the at least one of the plurality of clients is operably coupled to
receive at least a portion of the stream of program data, wherein
the client module includes: a selection module operable to produce
at least one of the select requests; and a network interface
controller operably coupled to transmit the at least one of select
requests to the multimedia server and to receive the stream of
program data via the first communication path.
2. The multimedia system of claim 1, wherein the plurality of
clients comprises at least one of: a computer, a laptop computer, a
personal digital assistant, a video telephone, a digital telephone,
a cellular telephone, a monitor, a television, a high definition
television, printer, and a facsimile machine.
3. The multimedia system of claim 1, wherein the multimedia server
further comprises: a control module operably to the tuning module,
the program mixer, the first transceiving module and the second
transceiving module, wherein the control module interprets the
select requests to produce the set of program select commands,
wherein the control module facilitates formatting the stream of
program data for transmission via the first transceiving module and
the second transceiving module, and wherein the control module
facilitates deformatting of the select requests.
4. The multimedia system of claim 3, wherein the first
communication path comprises at least one of: a wireline
connection, wherein the stream of program data and the select
requests are transceived via the wireline connection utilizing a
type of transceiving that includes at least one of: time division
multiplexing, frequency division multiplexing, pulse code
modulation, amplitude shift keying, phase shift keying, quadrature
phase shift keying, quadrature amplitude modulation, carrier sense
multi-access (CSMA), CSMA with collision avoidance, and CSMA with
collision detection; a transmit wireline connection, wherein the
stream of program data is transmitted via the transmit wireline
connection utilizing a type of transmission that includes at least
one of: time division multiplexing, frequency division
multiplexing, pulse code modulation, amplitude shift keying, phase
shift keying, quadrature phase shift keying, quadrature amplitude
modulation, carrier sense multi-access (CSMA), CSMA with collision
avoidance, and CSMA with collision detection; a receive wireline
connection, wherein the select requests are received via the
receive wireline connection utilizing a type of reception that
includes at least one of: time division multiplexing, frequency
division multiplexing, pulse code modulation, amplitude shift
keying, phase shift keying, quadrature phase shift keying,
quadrature amplitude modulation, carrier sense multi-access (CSMA),
CSMA with collision avoidance, and CSMA with collision detection; a
radio frequency path, wherein the stream of program data and the
select requests are transceived via the radio frequency path
utilizing the type of transceiving; a transmit radio frequency
path, wherein the stream of program data is transmitted via the
transmit radio frequency path utilizing the type of transmission; a
receive radio frequency path, wherein the select requests are
received via the receive radio frequency path utilizing the type of
reception; a infrared path, wherein the stream of program data and
the select requests are transceived via the infrared path utilizing
the type of transceiving; a transmit infrared path, wherein the
stream of program data is transmitted via the transmit infrared
path utilizing the type of transmission; and a receive infrared
path, wherein the select requests are received via the receive
infrared path utilizing the type of reception.
5. The multimedia system of claim 3, wherein the control module
further comprises: a host processor, external I/O bus, host memory,
memory bridge interoperably coupled to provide server control
operations, wherein the server control operations include:
interpreting the select requests to produce the set of program
select commands; and coordinating the mixing of the set of
programs, formatting of the stream of program data and transmitting
the formatted program data, such that a client of the plurality of
clients receives appropriate requested data.
6. The multimedia system of claim 5, wherein the control module
further comprises: a hard drive operably coupled to store at least
a portion of the stream of data.
7. The multimedia system of claim 3, wherein the control module
further comprises: means for processing client access privileges
for each of the plurality of clients.
8. The multimedia system of claim 1, wherein the first transceiving
module further comprises: an analog multiplexor for converting the
stream of program data into analog signals, wherein the analog
signals are transmitted to the at least one of the plurality of
clients.
9. The multimedia system of claim 1, wherein the set of program
select commands comprises at least one of: audio program select;
video program select; audio source; video source; volume adjust;
picture quality settings and adjustments; displaying restrictions;
purchase requests; picture-in-picture activation and deactivation;
picture-in-picture program select; video blanking; and audio
muting.
10. A multimedia server for use in a multimedia system, the
multimedia server comprising: a tuning module operably coupled to
receive a plurality of channels from a multimedia source and to
select a set of channels from the plurality of channels based on a
set of channel select commands that is derived from select
requests; a channel mixer operably coupled to mix the set of
channels into a stream of channel data; a transceiving module,
operably coupled to transmit the stream of channel data on to a
communication path and to receive the select requests from at least
one client module, remote from the multimedia server and affiliated
with at least one of a the plurality of clients, wherein the
communication path comprises: a wireline connection, wherein the
stream of channel data and the select requests are transceived via
the wireline connection utilizing a type of transceiving that
includes at least one of: time division multiplexing, frequency
division multiplexing, pulse code modulation, amplitude shift
keying, phase shift keying, quadrature phase shift keying,
quadrature amplitude modulation, carrier sense multi-access (CSMA),
CSMA with collision avoidance, and CSMA with collision detection; a
transmit wireline connection, wherein the stream of channel data is
transmitted via the transmit wireline connection utilizing a type
of transmission that includes at least one of: time division
multiplexing, frequency division multiplexing, pulse code
modulation, amplitude shift keying, phase shift keying, quadrature
phase shift keying, quadrature amplitude modulation, carrier sense
multi-access (CSMA), CSMA with collision avoidance, and CSMA with
collision detection; and a receive wireline connection, wherein the
select requests are received via the receive wireline connection
utilizing a type of reception that includes at least one of: time
division multiplexing, frequency division multiplexing, pulse code
modulation, amplitude shift keying, phase shift keying, quadrature
phase shift keying, quadrature amplitude modulation, carrier sense
multi-access (CSMA), CSMA with collision avoidance, and CSMA with
collision detection; and a control module operably to the tuning
module, the channel mixer, and the transceiving module, wherein the
control module interprets the select requests to produce the set of
channel select commands, wherein the control module facilitates
formatting the stream of channel data for transmission via the
transceiving module, and wherein the control module facilitates
deformatting of the select requests; wherein the control module
formats the stream of channel data based on the type of
transceiving to produce formatted channel data, wherein the
transceiving module provides the formatted channel data to the at
least one of the plurality of clients during transmitting intervals
on the wireline connection, wherein the client module causes the
select requests to be formatted based on the type of transceiving
to produce formatted select requests, wherein the transceiving
module receives the formatted select requests via the wireline
connection during receiving intervals on the wireline connection,
and wherein the control module determines the transmitting
intervals and the receiving intervals.
11. The multimedia server of claim 10, wherein the transceiving
module further comprises: a transmission router operably coupled to
the control module and the channel mixer; wherein the control
module causes the stream of channel data to be formatted based on
the type of transmission to produce formatted channel data, and
wherein the transmission router provides the formatted channel data
to the at least one of the plurality of clients.
12. The multimedia server of claim 10 wherein the transceiving
module further comprises: a reception router operably coupled to
the control module; wherein the client module formats at least one
of: the select requests and inbound data based on the type of
reception to produce formatted reception data, and wherein the
reception router receives the formatted reception data via the
wireline connection.
13. The multimedia server of claim 10, wherein the control module
further comprises: a host processor, external I/O bus, host memory
and memory bridge interoperably coupled to provide server control
operations, wherein the server control operations include:
interpreting the select requests to produce the set of channel
select commands; and coordinating the mixing of the set of
channels, formatting of the stream of channel data and transmitting
the formatted channel data, such that a client of the plurality of
clients receives appropriate requested data.
14. The multimedia server of claim 13, wherein the control module
further comprises: a hard drive operably coupled to store at least
a portion of the stream of data.
15. The multimedia server of claim 10, wherein the control module
further comprises: means for processing client access privileges
for each of the plurality of clients.
16. The multimedia server of claim 10, wherein the transceiving
module further comprises: an analog multiplexor for converting the
stream of channel data into analog signals, wherein the analog
signals are transmitted to the at least one of the plurality of
clients.
17. The multimedia server of claim 10 further comprising: a second
transceiving module operably coupled to transmit the stream of
channel data via a second communication path.
18. A method for use in a multimedia system, the method comprising:
providing multimedia services to a local area network having at
least one communication path that comprises at least one of: radio
frequency path, wherein the stream of channel data and the select
requests are transceived via the radio frequency path utilizing the
type of transceiving that includes at least one of: time division
multiplexing, frequency division multiplexing, pulse code
modulation, amplitude shift keying, phase shift keying, quadrature
phase shift keying, quadrature amplitude modulation, carrier sense
multi-access (CSMA), CSMA with collision avoidance, and CSMA with
collision detection; transmit radio frequency path, wherein the
stream of channel data is transmitted via the transmit radio
frequency path utilizing the type of transmission that includes at
least one of: time division multiplexing, frequency division
multiplexing, pulse code modulation, amplitude shift keying, phase
shift keying, quadrature phase shift keying, quadrature amplitude
modulation, carrier sense multi-access (CSMA), CSMA with collision
avoidance, and CSMA with collision detection; receive radio
frequency path, wherein the select requests are received via the
receive radio frequency path utilizing the type of reception that
includes at least one of: time division multiplexing, frequency
division multiplexing, pulse code modulation, amplitude shift
keying, phase shift keying, quadrature phase shift keying,
quadrature amplitude modulation, carrier sense multi-access (CSMA),
CSMA with collision avoidance, and CSMA with collision detection;
infrared path, wherein the stream of channel data and the select
requests are transceived via the infrared path utilizing the type
of transceiving; transmit infrared path, wherein the stream of
channel data is transmitted via the transmit infrared path
utilizing the type of transmission; and receive infrared path,
wherein the select requests are received via the receive infrared
path utilizing the type of reception; receiving a plurality of
channels from at least one multimedia source; receiving select
requests from at least one client module via the communication
path; generating a set of channel select commands from the select
requests; selecting a set of channels from the plurality of
channels based on the set of channel select commands; mixing the
set of channels into a stream of channel data; and transmitting the
stream of channel data on to the communication path such that at
least one of a plurality of clients receives at least a portion of
the stream of channel data.
19. The method of claim 18 further comprising: interpreting the
select requests to produce the set of channel select commands;
formatting the stream of channel data for transmission via the
transceiving module; deformatting of the select requests as part of
generating the set of channel select commands.
20. The method of claim 18 further comprising; interpreting the
select requests to produce the set of channel select commands; and
coordinating the mixing of the set of channels, formatting of the
stream of channel data and transmitting the formatted channel data,
such that a client of the plurality of clients receives appropriate
requested data.
21. The method of claim 18 further comprising: storing at least a
portion of the stream of data on a hard drive.
22. The method of claim 18 further comprising: processing client
access privileges for each of the plurality of clients.
23. The method of claim 18 further comprising: converting the
stream of channel data into analog signals, wherein the analog
signals are transmitted to the at least one of the plurality of
clients.
24. The method of claim 18 further comprising: transmitting the
stream of channel data via a second communication path.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority under 35 USC 120 as
a continuation of application Ser. No. 09/865,136, entitled,
"METHOD AND APPARATUS FOR CHANNEL MIXING IN A MULTIMEDIA SYSTEM",
filed on May 24, 2001 the contents of which are incorporated herein
by reference thereto. The present application is further related to
application Ser. No. 09/864,524, entitled, "METHOD AND APPARATUS
FOR A MULTIMEDIA SYSTEM", filed on May 24, 2001, issued as U.S.
Pat. No. 7,099,951.
TECHNICAL FIELD OF THE INVENTION
[0002] This invention relates generally to communication systems
and more particularly to in-home local area networking.
BACKGROUND OF THE INVENTION
[0003] Communication systems are known to convey data from one
entity to another. The data may be audio data, video data and/or
text data. In such communication systems, the data is transmitted
via one or more transmission mediums (e.g., radio frequencies,
coaxial cable, twisted pair copper wire, fiber optic cabling, et
cetera) in accordance with one or more data transmission protocols.
The distance over which the data traverses within a communication
system may be inches, feet, miles, tens of miles, hundreds of
miles, thousands of miles, et cetera.
[0004] As is also known, communication systems have two basic
configurations: wide area networks (WAN) and local area networks
(LAN). In addition, WAN and/or LAN communication systems may use a
variety of transmission types including broadcast transmissions,
asymmetrical transmissions, and symmetrical transmissions. In a
broadcast communication system, a network hub transmits data to a
plurality of users with little or no data being transmitted from
the users to the network hub. Examples of broadcast communication
systems include radio systems, NTSC (national television standards
committee) television systems (e.g., regular TV), high definition
television systems, cable systems, and satellite systems. In each
of these broadcast communication systems, a network hub (e.g.,
radio station, television station, et cetera) transmits a broadcast
signal. Any user within range of the broadcast signal and who has
an appropriate receiver (e.g., radio, television, et cetera) can
receive the broadcast signal. Such broadcast systems employ a
particular data transmission protocol such as amplitude modulation,
frequency modulation, ultra-high frequency, very high frequency, et
cetera.
[0005] Asymmetrical communication systems transmit more data in one
direction than in another (i.e., one entity transmits to others
more than it receives data from each of the other entities). An
example of an asymmetrical communication system is the Internet,
where web servers transmit substantially more data than they
receive from any one user. The Internet uses TCP/IP as its data
transmission protocol, while a variety of physical layer data
transmission protocols may be used to access the Internet. Such
physical layer data transmission protocols include asynchronous
transfer mode (ATM), frame relay, integrated services digital
network (ISDN), digital subscriber loop (DSL) and all derivatives
thereof, and multiple packet label switching (MPLS). Such
asymmetrical communication systems may be wide area networks (e.g.,
the Internet), or local area networks (e.g., local server based
system).
[0006] Symmetrical communication systems include a plurality of
users where the data flow between any of the users could be equal.
Examples of symmetrical communication systems include public switch
telephone network (PSTN), local computer networks, cellular
telephone systems, intercom systems, private branch exchanges
(PBX), et cetera. Such symmetrical communication systems use at
least one data transmission protocol. For example, a computer
network may utilize any one of the Ethernet standards.
[0007] In any type of communication system, a user must have the
appropriate receiving and possibly transmitting equipment to
independently access the communication system. For example, a user
of a satellite television system must have a satellite receiver and
a television to receive satellite broadcast. If another television
is to independently access the satellite broadcast, it needs its
own satellite receiver. The same is true for NTSC broadcast, cable
broadcast, et cetera, although currently most televisions include
an NTSC tuner and/or some form of cable tuner.
[0008] With the number of households having multiple television
sets increasing, and many users wanting the latest and greatest
video viewing services. As such, many households have multiple
satellite receivers, cable set-top boxes, modems, et cetera. As is
further known, dependent multiple access to satellite broadcasts
may be achieved by linking slave televisions to a master
television. The master television has full control of, and
independent access to, the satellite receiver while the slave
televisions receive whatever channel has been selected by the
master.
[0009] For in-home Internet access, each computer or Internet
device has its own Internet connection. As such, each computer or
Internet device includes a modem. As an alternative to each
computer having its modem, an in-home local area network may be
used to provide Internet access. In such an in-home local area
network, each computer or Internet device includes a network card
to access a server. The server provides the coupling to the
Internet. Currently, the cost of a network card is at least as
expensive as a 56K modem thus, there is no cost savings with such
an in-home local area network.
[0010] As is further known, in-home local area networks use one or
more of telephone lines, radio frequencies, power lines, and/or
infrared connections as the communication medium. Such in-home
local area networks are typically used to facilitate an in-home
computer network that couples a plurality of computers with one or
more printers, facsimile machine, etc. As such, entertainment type
data transmissions (e.g., from VCRs, DVDs, et cetera) are not
supported by the in-home local area network without having the home
specially wired to support an in-home LAN that transceives
entertainment type data.
[0011] Therefore, a need exists for a method and apparatus for a
communication system to overcome the above-mentioned issues and to
offer additional services within homes.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 illustrates a schematic block diagram of a multimedia
system in accordance with the present invention;
[0013] FIG. 2 illustrates a schematic block diagram of another
multimedia communication system in accordance with the present
invention;
[0014] FIG. 3 illustrates a schematic block diagram of a further
multimedia communication system in accordance with the present
invention;
[0015] FIG. 4 illustrates a schematic block diagram of yet another
multimedia communication system in accordance with the present
invention;
[0016] FIG. 5 illustrates a schematic block diagram of a still
further multimedia communication system in accordance with the
present invention;
[0017] FIG. 6 illustrates a schematic block diagram of a multimedia
server and client modules of the multimedia communication system
illustrated in FIG. 1;
[0018] FIG. 7 illustrates a schematic block diagram of a multimedia
server and client modules of the multimedia communication system of
FIG. 2;
[0019] FIG. 8 illustrates a schematic block diagram of a multimedia
server and client modules of the multimedia communication system of
FIG. 3;
[0020] FIG. 9 illustrates a schematic block diagram of a multimedia
server and client modules of the multimedia communication system of
FIG. 4;
[0021] FIG. 10 illustrates a schematic block diagram of a
multimedia server and client modules of the multimedia
communication system of FIG. 5;
[0022] FIG. 11 illustrates a schematic block diagram of a
multimedia server and a client module that may be used in any one
of the multimedia communication systems of FIGS. 1 through 5;
[0023] FIG. 12 illustrates a more detailed schematic block diagram
of a multimedia server that may be used in the multimedia
communication system of FIG. 1;
[0024] FIG. 13 illustrates a more detailed schematic block diagram
of a multimedia server that may be used in the multimedia
communication system of FIG. 2;
[0025] FIG. 14 illustrates a more detailed schematic block diagram
of a multimedia server that may be used in the multimedia
communication system of FIG. 3;
[0026] FIG. 15 illustrates a more detailed schematic block diagram
of a multimedia server that may be used in the multimedia
communication system of FIG. 4;
[0027] FIG. 16 illustrates a more detailed schematic block diagram
of a multimedia server that may be used in the multimedia
communication system of FIG. 5;
[0028] FIG. 17 illustrates a functional diagram of a tuning module
that may be incorporated in a multimedia server in accordance with
the present invention;
[0029] FIG. 18 illustrates a functional diagram of a channel mixer
that may be incorporated in a multimedia server in accordance with
the present invention;
[0030] FIG. 19 illustrates an alternate functional diagram of a
tuning module that may be incorporated in a multimedia server in
accordance with the present invention;
[0031] FIG. 20 illustrates a schematic block diagram of a
multimedia server operably coupled to one or more client modules
via a wire line connection in accordance with the present
invention;
[0032] FIG. 21 illustrates a schematic block diagram of a
multimedia server being operably coupled to one or more client
modules via an RF communication path in accordance with the present
invention;
[0033] FIG. 22 illustrates a schematic block diagram of a
multimedia server operably coupled to one or more client modules
via an infrared communication path in accordance with the present
invention;
[0034] FIG. 23 illustrates a schematic block diagram of an
alternate multimedia server in accordance with the present
invention;
[0035] FIG. 24 illustrates a logic diagram of a method for data
conveyance within a multimedia communication system in accordance
with the present invention;
[0036] FIG. 25 illustrates a logic diagram of a method for
conveying data within the multimedia communication system via a
wire line connection in accordance with the present invention;
[0037] FIG. 26 illustrates a graphical representation of data
conveyances within a multimedia communication system in accordance
with the present invention;
[0038] FIG. 27 illustrates a logic diagram of a method for data
conveyances within a multimedia communication system utilizing a
radio frequency communication path in accordance with the present
invention;
[0039] FIG. 28 illustrates a logic diagram of a method for data
conveyances within a multimedia communication system via an
infrared communication path in accordance with the present
invention;
[0040] FIG. 29 illustrates a schematic block diagram of a tuning
module, which may be incorporated in a multimedia server in
accordance with the present invention;
[0041] FIG. 30 illustrates a schematic block diagram of an
alternate tuning module, which may be incorporated in a multimedia
server in accordance with the present invention;
[0042] FIG. 31 illustrates a schematic block diagram of another
tuning module, which may be incorporated in a multimedia server in
accordance with the present invention;
[0043] FIG. 32 illustrates schematic block diagram of yet another
tuning module, which may be incorporated in a multimedia server in
accordance with the present invention;
[0044] FIG. 33 illustrates a logic diagram of a method for
selecting channels within a multimedia system in accordance with
the present invention;
[0045] FIG. 34 illustrates a logic diagram further illustrating the
receiving the channel selection commands of the logic diagram of
FIG. 33;
[0046] FIG. 35 illustrates a logic diagram of a further method for
receiving the channel selection commands of the logic diagram of
FIG. 33;
[0047] FIG. 36 illustrates a logic diagram of an alternate method
for channel selection within a multimedia communication system in
accordance with the present invention;
[0048] FIG. 37 illustrates a logic diagram of a method further
describing the receiving of channel selection commands of the logic
diagram of FIG. 36;
[0049] FIG. 38 illustrates a schematic block diagram of a channel
mixer for use in a multimedia communication system in accordance
with the present invention;
[0050] FIG. 39 illustrates a schematic block diagram of a channel
mixer operably coupled to components within a multimedia server in
accordance with the present invention;
[0051] FIG. 40 illustrates a schematic block diagram of an
alternate channel mixer for use in a multimedia communication
system in accordance with the present invention;
[0052] FIG. 41 illustrates a schematic block diagram of another
channel mixer that may be used in a multimedia communication system
in accordance with the present invention;
[0053] FIG. 42 illustrates a logic diagram of mixing signals within
a multimedia communication system in accordance with the present
invention;
[0054] FIG. 43 illustrates a logic diagram that further defines the
processing step of FIG. 42;
[0055] FIG. 44 illustrates a logic diagram of a method that further
describes the converting step of FIG. 42;
[0056] FIG. 45 illustrates a logic diagram of another method that
further defines the converting step of FIG. 42;
[0057] FIG. 46 illustrates a logic diagram of yet another method
that further defines the converting step of FIG. 42;
[0058] FIG. 47 illustrates a logic diagram of a still further
method that further defines the converting step of FIG. 42;
[0059] FIG. 48 illustrates a logic diagram of a method that further
defines Step 1052 of FIG. 42;
[0060] FIG. 49 illustrates a logic diagram of an alternate method
for mixing channels in accordance with the present invention;
[0061] FIG. 50 illustrates a schematic block diagram of a client
module operably coupled to a client in accordance with the present
invention;
[0062] FIG. 51 illustrates a more detailed schematic block diagram
of a client module operably coupled to a client in accordance with
the present invention;
[0063] FIG. 52 illustrates a schematic block diagram of an
alternate client module in accordance with the present
invention;
[0064] FIG. 53 illustrates a logic diagram of a method for
processing data within a client module in accordance with the
present invention;
[0065] FIG. 54 illustrates a logic diagram of a method that further
describes Steps 1236 and 1238 of FIG. 53;
[0066] FIG. 55 illustrates a logic diagram of an alternate method
for processing data within a client module in accordance with the
present invention;
[0067] FIG. 56 illustrates a logic diagram of an extension of the
method illustrated in FIG. 55;
[0068] FIG. 57 illustrates a logic diagram of a method for a
multimedia server to provide network connection for clients in
accordance with the present invention;
[0069] FIG. 58 illustrates a logic diagram of a method that further
defines Step 1342 of FIG. 57;
[0070] FIG. 59 illustrates a logic diagram of a method that further
defines Step 1362 of FIG. 58;
[0071] FIG. 60 illustrates a logic diagram of a method that further
describes Step 1348 of FIG. 57;
[0072] FIG. 61 illustrates a logic diagram of a method for
processing client-to-client communications and network
communications within a multimedia server communication system in
accordance with the present invention;
[0073] FIG. 62 illustrates a logic diagram of an alternate method
for processing network communications and client-to-client
communications within a multimedia communication system in
accordance with the present invention;
[0074] FIG. 63 illustrates a logic diagram of a method for managing
resources within a multimedia communication system in accordance
with the present invention;
[0075] FIG. 64 illustrates a logic diagram of an extension of the
method of FIG. 63; and
[0076] FIG. 65 illustrates a logic diagram of an alternate method
for managing resources within a multimedia communication system in
accordance with the present invention.
DETAILED DISCUSSION OF A PREFERRED EMBODIMENT
[0077] Generally, the present invention provides a method and
apparatus for channel mixing within a multimedia system. Such a
method and apparatus includes processing that begins by receiving a
set of channels as encoded channel data. The set of channels
corresponds to the channels that have been selected by a plurality
of clients via selection requests. The processing continues by
interpreting the encoded data to identify a channel of interest for
at least one client based on the client's channel selection
request. This is typically done for each client that has provided a
channel selection request to a multimedia server. The processing
then continues by processing the data of the channel of interest
based on a type of channel to produce generic data. For example, if
the incoming data corresponds to a channel of a satellite
transmission, the incoming data will be in a MPEG format. The MPEG
data is converted into a generic video data such as digital RGB,
digital YCBCR, et cetera. The processing continues by converting
the generic data into a stream of data for transmission. With such
a method and apparatus, an in-home communication network is
established that allows multiple client devices to have independent
access to multimedia sources without requiring traditional
receiving and/or transmitting equipment associated with independent
access to such multimedia sources.
[0078] The present invention can be more fully described with
reference to FIGS. 1 through 65. FIG. 1 illustrates a multimedia
system 10 that includes a multimedia server 12, a plurality of
client modules 14-22 operably coupled to a plurality of clients
26-34. The multimedia server 12 is operably coupled to receive a
plurality of channels 36 from a multimedia source 24. The
multimedia source 24 may be a satellite connection, cable
connection, antenna connection for NTSC television broadcast, HDTV
broadcast, PAL broadcast, et cetera. As one of average skill in the
art will appreciate, the multimedia server 12 may be a stand-alone
device, may be incorporated in a satellite receiver, set-top box,
cable box, HDTV tuner, home entertainment receiver, et cetera. In
addition, the multimedia server 12 may be implemented using
discrete components, integrated circuits, and/or a combination
thereof.
[0079] The multimedia server 12 communicates with the plurality of
client modules 14-22 via a communication path, which may be a radio
frequency communication path, a wire line connection, an infrared
connection, and/or any other means for conveying data. As such, the
multimedia server 12 and each of the client modules 14-22 include a
receiver and/or transmitter operable to convey data via the given
type of communication path.
[0080] As shown, each client module is operably coupled to one of
the clients. For example, client module 14 is operably coupled to
client 26, which is representative of a personal digital assistant.
Client module 16 is operably coupled to client 28, which is
representative of a personal computer. Client module 18 is operably
coupled to client 30, which is representative of a monitor (e.g.,
LCD monitor, flat panel monitor, CRT monitor, et cetera). Such a
monitor may include speakers, or a speaker connection, control
functions including channel select, volume control, picture
quality, et cetera. Client module 20 is operably coupled to client
32, which may be a television set, high definition television
(HDTV), standard definition television (SDTV), a home theatre
system, et cetera. Client module 22 is operably coupled to client
34, which is representative of a laptop computer.
[0081] As one of average skill in the art will appreciate, the
client module 22 may be a separate device from its associated
client or embedded within the client. In addition, one of average
skill in the art will further appreciate that the client modules
14-22 may be implemented utilizing discrete components and/or
integrated circuits.
[0082] Each of the clients 26-34, via its associated client module
14-22, selects one or more channels from the plurality of channels
36. As shown, client 26 has selected channel 3 of the plurality of
channels for viewing. Accordingly, client module 14 relays the
channel selection of channel 3 to the multimedia server 12. The
multimedia server 12 selects channel 3 from the plurality of
channels 36. The data corresponding to channel 3 is then
multiplexed with the data for the other channels and transmitted
from the multimedia server 12 to each of the client modules 14-22.
Client module 14 monitors the transmission from the multimedia
server 12 and extracts the data corresponding to channel 3. The
extracted data for channel 3 is then provided to the client 26 for
display.
[0083] Client module 16, 18, 20 and 22 perform a similar function
for their associated clients 28, 32 and 34, respectively. As shown,
client 28 has selected channel 505, client 30 has selected channel
106, client 32 has selected channel 206 and client 34 has selected
channel 9. The client modules 16-22 provide the channel selection
of its respective client 28-34 to the multimedia server 12.
Multimedia server 12 extracts the selected channels from the
plurality of channels for each selection request, multiplexes the
data for each of the selected channels (for this example channel 3,
9, 106, 206 and 505) into a stream of data. The stream of data is
then transmitted to each of the client modules. Each client module
extracts the appropriate data of the selected channel for its
respective client. For example, client module 16 monitors the
transmitted data for data related to channel 505, client module 18
monitors for data related to channel 106, client module 20 monitors
the transmission for data related to channel 206 and client module
22 monitors the transmission for data related to channel 9.
[0084] From each client's prospective, the client 26-34 has
independent access to the multimedia source 24. Accordingly, client
26 may at any time change its channel selection from, for example,
channel 3 to channel 120. The client module 14 provides the channel
selection request to the multimedia server 12, which now retrieves
data related to channel 120 for client 26 as opposed to channel 3.
Similarly, client 28-34 could also change their channel selection
from the illustrated selection to another channel. Note that if two
clients have selected the same channel, for example, client 26 and
28 both have selected channel 3, the multimedia server 12 would
only extract data for channel 3 once and place in the header
information of the data relating to channel 3 the identity of both
client module 14 and 16. As such, client module 14 and 16 would
extract the same data from the transmission by the multimedia
server 12 and provide it to its respective clients.
[0085] As one of average skill in the art will appreciate, the
multimedia system of FIG. 1 provides each client with independent
access to the multimedia source 24. As an alternate embodiment, the
functionality of client modules 14-22 may vary. For example, client
module 14 may not provide all the independent functionality that
client module 16 does. For example, client module 14 may not have
independent channel selection capabilities but only selecting
channels that one of the other clients have selected.
Alternatively, one client module may service a plurality of
clients.
[0086] FIG. 2 illustrates a schematic block diagram of a multimedia
system 40 that includes a multimedia server 42, a plurality of
client modules 46-54, and a plurality of clients 26-34. The
multimedia server 42 is operably coupled to a wide area network
(WAN) 44 and/or to a public switch telephone network (PSTN) 66. The
wide area network 44 may be, for example, the Internet. The
multimedia server 42 may be a stand-alone device or incorporated
within a modem or within one of the clients 26-34. The
functionality of multimedia server 42 may be implemented utilizing
discrete components and/or integrated circuits with accompanying
software.
[0087] The plurality of client modules 46-54 communicates with the
multimedia server 42 via a communication path. The communication
path may be a radio frequency communication path, infrared
communication path, and/or wire line communication path. In this
system 40, the multimedia server 42 is providing independent access
for each of the clients 26-34 to the public switch telephone
network 66 and/or to the wide area network 44.
[0088] For access to the public switch telephone network 66, each
client 26-34 includes an identification code (e.g., a telephone
number). The multimedia server 42 includes cordless telephone
functionality such that the multimedia server 42 acts as a base
station while each of the client modules 46-54 in conjunction with
its respective client 26-34 functions as a handset. As such, for
typical telephone communications, the multimedia server 42 is a
single base station that includes a plurality of handsets, i.e.,
the clients 26-34 and their associated client modules 46-54. Note
that if the multimedia server 42 has multiple connections to the
public switch telephone network 66, multiple clients may have
simultaneous telephone conversations ongoing. In addition, the
multimedia server 42 may include private branch exchange (PBX)
functionality such that communications between each client may
occur within the system. For example, client 26 may communicate
with client 34 via the multimedia server 42.
[0089] For accessing the wide area network 44, multimedia server 42
includes a network connection, which may be a DSL modem, cable
modem, 56K modem, ISDN modem, etc. In addition, the multimedia
server 42 includes a plurality of network access applications
(e.g., web browser applications, email applications, et cetera) to
facilitate each client's access to the wide area network 44. In
operation, the client modules 46-54, for their respective clients
26-34, provide an indication that its client desires access to the
wide area network 44. Upon receiving the wide area network request,
the multimedia server 42 opens a network access application (email
or web browser) for the respective client based on the request. The
multimedia server 42 may have multiple network access applications
open for each client 26-34. When this occurs, the multimedia server
42 allocates access to the network connection amongst the clients
in a predetermined manner. For example, the multimedia server 42
may utilize a token passing concept to provide access to the
network connection for each of the clients.
[0090] The multimedia server 42 receives data from the wide area
network 44, which is destined for one or more of the clients 26-34.
The multimedia server 42 multiplexes the data and provides a single
transmission stream to the plurality of client modules 46-54. Each
of the client modules monitors the transmission from the multimedia
server 42 to extract data for its respective client 26-34. Upon
detecting data for its client, the client module 46 extracts the
data and subsequently provides it to its client.
[0091] In this illustration, clients 30-34 are accessing the
Internet thus are using a web application. For instance, client 34
has web page 56 open, client 32 has web page 58 open, and client 30
has web page 60 open. Each of these web pages appear to the
respective client as if the client has direct and independent
access to the wide area network. As is also shown, clients 26 and
28 have opened an email application 64 and 62, respectively. As
such, client 26 and 28 may process their email via the multimedia
server 42.
[0092] FIG. 3 illustrates a schematic block diagram of a multimedia
system 80 that includes a multimedia server 88, a plurality of
client modules 90-98, a plurality of clients 26-34, a DVD player
82, a VCR 86, and other such playback devices. Other such playback
devices include laser-disk players, digital VCRs, close circuit
televisions, camcorders, et cetera. In this system 80, the
multimedia server 88 provides access to the playback equipment
devices, e.g., DVD player 82 and VCR 86, for each of the plurality
of clients. Each client may select to receive a DVD playback, a VCR
playback, or playback from any one of the other video sources.
[0093] In this illustration, client 26 has selected DVD playback
83. Accordingly, client 26 provides an indication of its selection
to client module 90. Client module 90 communicates client 26's
selection to the multimedia server 88. The multimedia server 88
processes the selection to provide the playback data to client
module 90. As further shown in FIG. 3, client 32 has also selected
DVD playback 83, while clients 28, 30 and 34 have selected VCR
playback 87. As such, each of the associated client modules 92-98
will provide its clients' selection to the multimedia server 88.
The multimedia server 88 processes the selections to produce a
stream of outgoing data. In this example, the stream of outgoing
data includes a multiplexing of the DVD playback 83 data and the
VCR playback 87 data. Accordingly, the transmission provided by
multimedia server 88 to the client modules 90-98 identifies which
packets and/or frames contain DVD playback data and which frames
and/or packets contain VCR playback data. For example, the
multimedia server 88 may tag packets as containing DVD playback
data or VCR playback data. Alternatively, the multimedia server 88
may tag the packets by including the identity of the particular
client module associated with the client that provided the specific
VCR or DVD playback request. In either case, the client modules
90-98 interpret the data transmitted from the multimedia server 88
to extract the appropriate data for its client. The extracted data
is then provided to its client for playback.
[0094] As one of average skill in the art will appreciate, the
multimedia server 88 may be operably coupled to the client modules
90-98 via an RF connection, infrared connection and/or a wire line
connection. In addition, each of the client modules 90-98 may be
separate devices and/or included within its respective client. As
one of average skill in the art will further appreciate, the client
modules 90-92 may be implemented in discrete circuit components
and/or integrated circuits and further includes associated
programming operations. Similarly, multimedia server 88 may be a
stand-alone device or incorporated within the DVD player 82, VCR
86, and/or any other video source. The multimedia server 88 may be
implemented utilizing discrete components, integrated circuits and
associated programming operations.
[0095] FIG. 4 illustrates a schematic block diagram of a multimedia
system 100 that includes a multimedia server 102, a plurality of
client modules 112-120, a plurality of clients 26-34, a digital
audio storage device 104, a DVD audio device 106, a radio receiver
108, and a CD player 110. In this illustration, the multimedia
system 100 provides a selection of multiple audio sources to a
plurality of clients without requiring an independent and direct
connection to each of the audio devices.
[0096] In operation, the client modules 112-120 receive a selection
request from its respective clients. The selection request is
selecting audio playback from the digital audio storage device 104,
which may be storing MP3 files, digitized audio, et cetera, the DVD
audio player 106, the radio receiver 108, the CD player 110, and/or
any other type of audio source.
[0097] Upon receiving the selection request, the multimedia server
102 processes the request to authenticate it and once
authenticated, retrieves data from the appropriate audio source
104-110. The multimedia server 102 multiplexes the audio data from
the audio sources 104-110 into a single transmission. Each of the
client modules 112-120 receives the transmission and extract the
relevant portions for its client.
[0098] As shown in FIG. 4, client 26 has selected to display audio
from the digital audio storage device 104. Accordingly, the client
26 provides the selection request to client module 112, which is
subsequently provided to the multimedia server 102. The multimedia
server 102 processes the request and initiates the playback from
the digital audio storage device 104. The audio playback data from
the storage device 104 is received by the multimedia server 102,
which multiplexes it with other audio playback data from other
audio sources and provides the single transmission to the client
modules. The transmission from the multimedia server 102 may be in
packets and/or frames. Each packet and/or frame includes a header
section that identifies the source of the data and/or the
destination of the data. Accordingly, client module 112 monitors
the transmission for data addressing it and/or identifying the
digital audio storage device 104. Upon detecting such data within
the transmission, the client module 112 extracts the data and
provides it to the client 26 for digital audio playback 122.
[0099] Client 28 has selected DVD audio playback 124. Accordingly,
client module 114 provides the selection request to multimedia
server 102. Multimedia server 102 initiates the DVD audio playback
via the DVD audio device 106. The DVD audio playback is multiplexed
with other audio playback data and provides the multiplexed data in
the single transmission to the client modules. Client module 114
extracts the DVD audio playback data and provides it to client 28.
Client module 120 provides the same function for client 34.
[0100] Client module 116 provides a similar function for client 30
but with respect to CD playback 126. Accordingly, client module 116
provides the CD playback request of client 30 to the multimedia
server 102. The multimedia server 102 initiates the CD playback via
CD player 110 and multiplexes the CD playback data into the
transmission stream. Client module 116 extracts the CD playback
data from the transmission stream and provides it to client 30.
[0101] Client module 118 provides radio playback 128 connectivity
to the multimedia server 102 for client 32. In this example, client
32 provides an indication for radio playback and the desired radio
station. Client module 118 provides the request to multimedia
server 102, which interprets the request and selects one of the
plurality of channels received via radio receiver 108. The data
from the selected radio channel is multiplexed with the other audio
data being processed by the multimedia server 102. The client
module 118 extracts the appropriate radio data from the
transmission and provides it to client 32.
[0102] FIG. 5 illustrates a schematic block diagram of a multimedia
system 130 that includes multimedia server 132, client modules
134-142, clients 26-34, and a plurality of multimedia sources. The
multimedia sources include VCR 86, DVD player 82, digital audio
storage device 104, DVD audio 106, radio receiver 108, CD player
110, multimedia source 24, public switch telephone network 66, wide
area network 44, and/or any other type of audio and/or video
source. In this system 130, the clients 26-34 may select playback
from, and/or connection to, any one of the multimedia sources. The
selection request from each client module would identify the
desired multimedia source, the client, the desired service and any
other information to assist the multimedia server 132 in processing
the request. As such, one client may be accessing the Internet,
while another client is watching a satellite broadcast channel,
while another is listening to a CD playback, while another is
talking on the telephone, and yet another is watching a DVD
playback. This is all done via the multimedia server 132 without
requiring the clients to have direct access to the multimedia
sources and without the requirement that each client have its own
multimedia source and/or multimedia source connection. In essence,
multimedia server 132 provides the functionality of one or more of
multimedia server 12, 42, 88 and 102 of FIGS. 1-4. While client
modules 134-142 provide the functionality of one or more of the
client modules described generally with reference to FIGS. 1-4.
[0103] As one of average skill in the art will appreciate, the
multimedia server 12, 42, 88, 102, and/or 132 may be incorporated
in a home theatre receiver, television set, modem, set-top box,
cable receiver, satellite receiver, VCR, DVD player, et cetera to
provide the networking functionality as generally described in
FIGS. 1-5. As one of average skill in the art will further
appreciate, the clients 26-34 of FIGS. 1-5 may be any one of a
personal computer, a laptop computer, a personal digital system, a
video telephone, a digital telephone, a cellular telephone, a
monitor, a television, a high definition television, a printer, a
facsimile machine, and/or any devices that includes an audio and/or
video display.
[0104] FIG. 6 illustrates a schematic block diagram of the
multimedia server 12 and client modules 14-22 of the system 10 of
FIG. 1. The multimedia server 12 includes a tuning module 150, a
channel mixer 152, a transceiving module 154, and a control module
156. The multimedia server 12 is operably coupled to each of the
client modules 14-22 via a communication path 192. The
communication path 192 may be a wire line connection, a transmit
wire line connection, a receive wire line connection, a
transceiving radio frequency path, a transmit radio frequency path,
a receive radio frequency path, a transceiving infrared path, a
transmitting infrared path, and/or a receiving infrared path.
[0105] Each of the channel modules 14-22 includes a network
interface controller 168, a selection module 170, and a video
and/or audio interface 172. The selection module 170 is operably
coupled to receive an input from the client to produce a channel
selection 178. Accordingly, if the client is a television set, the
television set provides a signal to the selection module 172
indicating the channel selected. Alternately, the channel selection
module 170 may include a remote control receiver such that when the
remote control of the television is used to change the channel on
the television set, the selection module 170 receives the control
signal, interprets it, and produces the channel selection 178
therefrom.
[0106] The network interface controller 168 receives the channel
selection 178 and prepares it for transmission via the
communication path 192 to the multimedia server 12. The processing
performed by the network interface controller 168 is dependent on
the type of communication path 192. For example, if the
communication path is a wire line connection, the channel selection
178 may be processed in accordance with a type of transceiving that
includes time division multiplexing (TDM), frequency division
multiplexing (FDM), pulse code modulation (PCM), amplitude shift
keying (ASK), phase shift keying (PSK), quadrature phase shift
keying (QPSK), quadrature amplitude modulation (QAM), carrier sense
multiple access (CSMA), CSMA with collision avoidance and/or CSMA
with collision detection.
[0107] The network interface controller 168 provides the process
channel selection 178 as a channel select request 190 to the
transceiving module 154 of multimedia server 12. As one of average
skill in the art will appreciate, client modules 14-20 perform a
similar function as client module 22 in producing their respective
channel select request 182-188. As one of average skill in the art
will appreciate, the channel selection 178 may include selecting an
audio channel, video channel, a particular audio source (e.g., CD
playback), a particular video source (e.g., DVD player), etc. In
addition, the channel select request 182-190 may further include
volume adjust, picture quality settings and adjustments, displaying
restrictions, purchase request, picture-in-picture activation and
deactivation, picture-in-picture channel select, video pausing,
reverse play, fast forward, and/or audio muting.
[0108] The transceiving module 154 receives the channel select
requests 182-190 from the plurality of client modules 14-22 via the
communication path 192. The transceiving module 154 extracts the
physical layer information from the requests 182-190 to retrieve
the respective channel select requests 164. The transceiving module
154 provides the channel select request 164 to control module 156.
As an analogy, note that the channel selections 178 may correspond
to network layer data while the channel selection request 182-190
may correspond to physical layer data of a ISO standardized
communication system. As such, channel selection request utilize
physical layer type identification within its header and include in
its data section the channel selections 178. The channel selections
include a header section and data section corresponding to the
particular channel selected.
[0109] The control module 156 processes the channel select request
164. The processing of the channel select request includes
authenticating the request and preparing a set of channel selection
commands 160 therefrom. The tuning module 150 receives the set of
channel selection commands 160 and extracts a set of channels 162
from a plurality of channels 158 based on the set of channel
selection commands 160. The plurality of channels corresponds to
channels provided via a satellite connection, a cable connection,
an NTSC broadcast, an HDTV broadcast, a PAL broadcast, et cetera.
The tuning module 150 provides data for each of the channels of the
set of channels 162 to the channel mixer 152.
[0110] The channel mixer 152 mixes (i.e., multiplexes) the set of
channels 162 to produce a stream of channel data 166. The mixing of
the set of channels includes converting the data of each channel
into a generic data type and then converting the generic data into
a specific data format for transmission as the stream of channel
data 166.
[0111] The transceiving module 154 transmits the stream of channel
data 166 in packets of channel data 180. Alternatively, the stream
of channel data 166 may be transmitted in frames of channel data.
Each of the client modules 14-22 receives the packets, or frames,
of channel data 180 via its network interface controller 168.
[0112] The network interface controller 168 of each client module
interprets the header of each packet of channel data 180 to
determine whether it addresses its corresponding client module. If
so, the network interface controller 168 removes the physical layer
portion of the packets of channel data 180 to retrieve channel data
176. The channel data 176 is provided to the video and/or audio
interface 172. For example, if the channel data 176 is video data,
the interface 172 is a video interface to a display input of the
associated client. Alternatively, if the channel data 176 is audio
data, the interface 172 is an audio interface that couples to an
audio input of the associated client.
[0113] FIG. 7 illustrates a schematic block diagram of multimedia
server 42 and client modules 46-54 of the multimedia system 40 of
FIG. 2. The multimedia server 42 includes a modem interface 202, a
processing module 204, memory 206 and a transceiving module 208.
The modem interface 202 is operably coupled to a network connection
200, which in turn is operably coupled to a wide area network 44.
The processing module 204 is also coupled to the public switch
telephone network 66.
[0114] Each of the client modules 46-54 includes a network
interface controller 168 and a client interface 222. In operation,
the client module, via its client interface 222, receives a request
that indicates the client's desire for either Internet connection
via wide area network 44, to place a telephone call via the PSTN
66, or for client-to-client communication. The client interface 222
provides connectivity to the client via a PCI bus interface, an AC
97 bus interface, a parallel input, a serial input, et cetera. The
network interface controller 168 processes the request from its
client to produce a request packet(s), which is/are transmitted to
the transceiving module 208 of the multimedia server 42.
[0115] The transceiving module 208 retrieves the request from the
packet(s) in accordance with the data conveyance protocol used by
the multimedia system. The transceiving module provides the
retrieved requests to the processing module 204. The processing
module 204 determines whether the request is valid. If so, the
processing module 204 sets up the appropriate interface with the
PSTN 66 and/or the WAN 44. The appropriate interfacing to the PSTN
for a telephone connection includes the processing module 204
performing base station like functions of a cordless telephone,
while the client module and/or client functions as a cordless
handset. As a base station, the processing module 204 initiates a
connection with the PSTN 66 to enable a telephone communication for
the requesting client.
[0116] If the request was for Internet access via wide area network
44, the appropriate interfacing includes the processing module
activating a network access application for the requesting client.
The network access application may be a web browser application,
email application, et cetera. The particular network access
application will be dependent upon the request provided by the
client. Upon activating the network access application, the
processing module determines whether the network connection 200 is
actively coupled to the wide area network 44. If not, the
processing module 204 establishes, via the modem interface 202, a
connection to wide area network 44 through the network connection
200. At this point, the respective client has access to the
Internet.
[0117] With the Internet access established, the client interface
222 receives Internet data from the client and provides it to the
network interface controller 168. The Internet data includes inputs
from the client in response to the particular network access
application (e.g., web browser, email, etc.). For example, the
inputs for an email application include send a message, read a
message, compose a message, etc. The corresponding processing of
these inputs by multimedia server, via the network access
application, is provided back to the client for display by the
client. As such, from the client's prospective, the client has
direct access to the Internet.
[0118] The client generates the inputs via a keyboard,
touch-screen, and/or other input device and provides them to the
client module via the client interface 222. The client interface
222 provides the inputs to the network interface controller 168,
which packetizes them to produce packets 218. The packets 218
include a header section and data section. The header section
includes identity of the client module and/or client, the
destination address, and other physical layer-type header
information. The data section includes the input data provided by
the client. Each client module 46-54 produces packets 210-218 in a
similar manner.
[0119] The network interface controller 168 provides the packets
210-218 to the transceiving module 208 of the multimedia server 42
via the communication path 192. Since Internet access is typically
a bi-directional communication, the communication path 192 may
include a separate transmit path and a separate receive path. The
transmit path may be used for transmitting packets 210-218 to the
multimedia server while the receiving path may be used to receive
multiplexed client data 230 from the multimedia server 42.
[0120] The transceiving module 208 receives packets 210-218 and
removes the physical layer header information to produce retrieved
requests 220. The retrieved requests 220 are provided to processing
module 204, which converts them into network data 224 by executing
the network access application thereon. Note that the network data
224 includes separate data for each of the clients accessing the
WAN. The processing module 204 provides the network data 224 to the
network connection 200, via the modem interface 202, as outbound
modem data 234. Responses to the outbound modem data 234 are
received via the network connection 200 as inbound modem data 232.
The processing module 204 receives the inbound modem data 232 as
received network packets 226 via the modem interface 202.
[0121] The processing module 204 interprets the received network
packets 224 to identify the source and/or destination of the
network packets. For each network packet that is destined for a
particular client, the processing module adds header information to
address the particular client thereby producing client data 228.
The transceiving module 208 performs the physical layer interfacing
on the client data 228 producing multiplex client data 230.
[0122] Each of the client modules 46-54 receives the multiplex
client data 232 via the communication path 192. The network
interface controller 168 monitors the multiplex client data 230 to
identify packets destined for its client module and its respective
client. For each packet the network interface controller 168
identifies for the corresponding client module, it strips off the
physical layer information and provides the respective client data
to the client interface 222. The client interface 222 provides the
respective client data to the client thereby facilitating Internet
access for the particular client.
[0123] The multimedia server 42 may also provide intercom, or
client-to-client, communications between the clients of the system
40. In this instance, the client interface 222 would receive a
request for intercom communications from its client. The network
interface controller 168 would packetize this request and provide
it to the transceiving module 208 of multimedia server 42. The
processing module 204 processes the request and determines whether
the request can be fulfilled. Whether the request can be fulfilled
is based on resource availability of the multimedia server,
bandwidth availability of the communication path 192, and
functionality capabilities of the clients involved in the intercom
communication. If the request can be fulfilled, the processing
module 204 provides a response to the initiating client module.
[0124] Once the intercom communication has been established, the
initiating client provides data to the multimedia server via the
network interface controller 168 in packets. The packets include a
header section and a data section, wherein the header section
indicates that the data section includes client-to-client data.
Once the processing module 204 receives the packetized intercom
data, the processing module 204 detects that this is a
client-to-client communication and processes the client-to-client
data 236. The processing module 204 provides the client-to-client
data 236 as part of the client data 228. The client data 228
includes header information that identifies it as a
client-to-client communication data, telecom data, and/or Internet
communication data.
[0125] The transceiving module 208 performs the physical layer
packetizing of the client data 228 to produce the multiplex client
data 230. The targeted client module identifies the packets
containing the client-to-client communication via the network
interface controller 168, which strips off the physical layer
portion of the packets and provides the client-to-client data to
the client interface 222. The client interface 222 provides the
intercom data to the respective client.
[0126] FIG. 8 illustrates a schematic block diagram of multimedia
server 88 and client modules 90-98 of the multimedia communication
system 80 of FIG. 3. The multimedia server 88 includes a tuning
module 240, a channel mixer 242, a transceiving module 246 and a
control module 244. Each of the client modules 90-98 includes a
network interface controller 270, a video and/or audio interface
172, and a selection module 272.
[0127] In operation, the selection module 272 receives an input
from a client to produce a source selection 276. The input from the
client indicates the particular multimedia source that is to be
accessed. In this example, the multimedia source may be a DVD
player 82, a VCR 86, a compressed video source 248, closed circuit
television system, and/or any other type of video source. The
selection module 272 may receive the input directly from the client
and/or include circuitry to receive the communication from the
remote control device of the client. As such, the selection module
272 interprets the remote control transmission of the client to
produce the source selection 276. The source selection 276 includes
a header section and a data section. The header section includes
the identity of the client module and indicates that the data
section including a request as opposed to actual data.
[0128] The source selection 276 is provided to the network
interface controller 270, which adds physical layer overhead onto
the source selection 276 and provides it as a select requests
258-266 to the multimedia server 88.
[0129] The transceiving module 246 receives the select requests
258-266 and removes the physical layer overhead. The transceiving
module 246 provides the select request 250, which includes the
source selections 276 of the client modules, to the control module
244. The control module processes the select request 250 to
authenticate the request, determine whether the server can support
the request, and, if so, produces a set of selection commands
252.
[0130] The tuning module 240 receives the set of selection commands
252 and selects data from one or more of the multimedia sources 82,
86, and 248 based on the corresponding selection commands 252. The
tuning module 240 provides the data from the selected multimedia
sources as a set of channels 254 to the channel mixer 242.
[0131] The channel mixer 242 processes the set of channels 254 by
converting the data of each multimedia source into generic data.
The generic data is converted into a specific format video data,
which is then combined into a stream of channel data 256. The
transceiving module 246 receives the stream of channel data 256 and
packetizes it for transmission as packets of data 268.
[0132] Each of the network interface controllers 270 of the client
modules 90-98 receives the packets of data 268. The network
interface controller 270 strips off the physical layer overhead and
interprets it to determine whether the packet is destined for its
respective client module. If so, the network interface controller
provides the audio and/or video data 274 contained in the packet to
the video and audio interface 172. The video and audio interface
172 provides the data to an audio input and/or video input of the
client.
[0133] FIG. 9 illustrates a schematic block diagram of multimedia
server 102 and client modules 112-120 of multimedia system 100 of
FIG. 4. In this illustration, multimedia server 102 includes a
transceiving module 286, a control module 284, a tuning module 280,
and a channel mixer 282. Each of the client modules 120 includes a
network interface controller 308, a selection module 310 and an
audio interface 312.
[0134] In operation, the selection module 310 receives an input
from its respective client. The input identifies a particular audio
source, such as digital audio storage 104, CD 110, DVD audio 106,
radio receiver 108. The input is processed by the selection module
310 to produce a source selection 314. The source selection 314
identifies the particular source and the corresponding client. The
network interface controller 308 packetizes the source selection
314 and provides it as a select request 298-306 to the multimedia
server 102.
[0135] The transceiving module 286 receives the select request
298-306 via the communication path 192 and reconstructs the source
selection 314 as selection request 288. The control module 284
receives the select request 288 and determines whether they can be
fulfilled. The determination is based on resources available within
the multimedia server 102, bandwidth availability of communication
path 192, authenticity of the particular client, and privilege
access for the particular client. If the selection request for the
client can be processed, the control module produces a selection
command 292 for each corresponding select request.
[0136] The tuning module 280 receives the set of selection commands
292 and accesses the playback data from the identified audio
source. The audio sources include the digital audio storage 104,
which may be storing digitized audio, MP3 files, CD player, DVD
audio player 106 and/or a radio receiver 108. The tuning module 280
outputs the selected playback of the corresponding audio services
as a set of channels 294.
[0137] The channel mixer 282 receives the set of channels 294 and
converts them into generic audio data. The generic audio data is
then converted into a specific audio data format, which is combined
into a stream of channel data 290. The channel mixer 282 provides
the stream of channel data 290 to the transceiving module 286. The
transceiving module 286 packetizes the stream of channel data 290
and provides it as packets of data 296 to the plurality of client
modules 112-120.
[0138] The network interface controller 308 of the client module
112-120 receives the packets of data 296. The network interface
controller 308 interprets each packet to determine whether the
packet is for its respective client module 120. For each packet
that is for its client module, network interface controller 308
extracts audio data 316 and provides it to the audio interface 312.
The audio interface 312 provides the audio data 316 for playback to
its respective client device.
[0139] FIG. 10 illustrates a schematic block diagram of multimedia
server 132 and client modules 134-142 of the multimedia
communication system 130 of FIG. 5. The multimedia server 132
includes processing module 345, memory 347, channel mixer 342,
transceiving module 346, control module 344, and tuning module 340.
Each of the client modules 142 includes a selection module 334,
network interface controller 330, client interface 222, video and
audio interface 172, video interface 332, and an audio interface
312.
[0140] In this multimedia communication system, a client may select
any one of a variety of multimedia services including
client-to-client communications, viewing a channel from a satellite
connection, cable connection, etc., viewing closed circuit
television, viewing compressed video stored in memory, viewing a
DVD, viewing a cassette from a VCR, listening to digital audio,
listening to a compact disk, listening to DVD audio, listening to a
radio station, accessing the Internet, and/or participating in a
telephone call.
[0141] To initiate one or more of these multimedia services, the
selection module 334 of a client module receives an input either
from the client device or a remote control device associated with
the client device. The input identifies the particular client as
well as identifying the particular service desired. The selection
module 334 interprets the input to produce a source selection 336.
The selection module 334 provides the source selection 336 to the
network interface controller 330.
[0142] The network interface controller 330 prepares the source
selection 336 for transmission to the multimedia server 132. The
preparation may be done by packetizing the source selection 336 for
a physical layer type transmission, placing at least a portion of
the source selection 336 in an allocated timeslot in a TDM
transmission scheme, responding to a polling request from the
multimedia server 132, requesting and/or receiving a token ring, et
cetera. Regardless of the type of access scheme used, the network
interface controller 330 produces a request 320-328, which is
transmitted to the transceiving module 346 of multimedia server
132.
[0143] The transceiving module 346 receives the request 320-328
from the client modules 134-142. The transceiving module 346
processes the request in accordance with the transmission scheme
utilized. For example, if the transmission scheme is carrier sense
multiple access, the transceiving module 346 interprets the header
to identify the particular client such that it may isolate the
individual request 320-328. As a further example, if TDM access is
utilized, the transceiving module 346 identifies the particular
timeslot allocated to each client module to identify the
corresponding request 320-328. Regardless of the type of
transmission scheme utilized, the transceiving module 346 removes
the physical layer type overhead from the requests 320-328 to
recapture the source selections 336. The source selections 336 are
provided as select requests 350 to the control module 344.
[0144] The transceiving module 346 processes requests 320-328 to
identify the particular type of selection being requested. If the
selection is to access one of the multimedia sources, it processes
that as described above. If, however, the transceiving module 346
detects one or more of the requests 320-328 requesting
client-to-client communication, the transceiving module 346
generates a client-to-client request, which is provided to
processing module 345.
[0145] The control module 334 interprets each of the select
requests 350 in accordance with the access privileges and
authentication processes for each of the client modules 134-142. If
the selection request is valid and the client module has been
authenticated, the control module 334 generates a select command
for each corresponding request 320-328. The control module 334
provides the select commands as a set of commands 352 to the tuning
module 340.
[0146] The tuning module 340 processes each of the select commands
of the set of commands 352 to identify the multimedia source to be
accessed. For each command received, the tuning module 340 selects
the appropriate channel of the multimedia sources. For multimedia
sources that include a plurality of channels, such as a satellite
connection, cable connection, radio receiver, et cetera, the tuning
module 340 selects the particular source and also further selects
one of the plurality of channels from such multimedia sources. The
resulting isolated channels are provided to the channel mixer 342
as a set of channels 348.
[0147] The processing module 345 receives client-to-client
communication requests and processes the request to produce
client-to-client data 236. The processing module 345 provides the
client-to-client data 236 as client data 228 to the channel mixer
342.
[0148] The channel mixer 342 processes the set of channels 348 and,
when included, the client data 228. The channel mixer 342 converts
the data of each channel of the set of channels 348 into generic
data. The client data 228 is multiplexed with the generic data of
the set of channels 348 to produce the stream of channel data 354.
The channel mixer 342 provides the stream of channel data 354 to
the transceiving module 346.
[0149] The transceiving module transmits the stream of channel data
354 in accordance with the data transmission protocol incorporated
by the multimedia communication system. As such, the stream of
channel data 354 is framed, packetized, et cetera to produce
packets of data 356 that are provided via a communication path to
each of the client modules 134-142.
[0150] The network interface controller 330 of each of the client
modules receives the packets of data 356 and interprets overhead
information within the header to determine whether this particular
packet is for the corresponding client module. If so, the network
interface controller strips off the overhead information and
further interprets the particular type of data contained in the
packet. This may be done by reading additional overhead information
to identify the particular sources of information and/or accessing
memory, which corresponds the anticipated packets with the source
selection 336. If the packets correspond to data received from one
of the multimedia sources, the network interface controller 330
provides audio and/or video data 338 to one or more of the
interfaces 172, 332 or 312. If, however, the data relates to a
client-to-client communication, telephone call or accessing the
Internet, the network interface controller 330 provides the
received data to the client interface 222.
[0151] Each of the interfaces 172, 222, 332, and 312 interfaces
with the respective client devices either through external ports of
the client device such as a serial port, parallel port, or internal
access through a PCI bus, AC 97 bus, et cetera. Once the data is
received by the client device, it is displayed visual and/or
audibly as if the client device had direct access to the particular
multimedia source being accessed.
[0152] As one of average skill in the art will appreciate, the
mixing of data performed by channel mixer 342 may utilize a
prioritization scheme depending on the type of data being mixed.
For example, if the data being mixed includes real time audio
and/or video data, such data may take priority over non-real time
video and/or audio. Such real time video and/or audio include
telephone communications, watching live broadcasts, et cetera while
non-real time video and/or audio include viewing a DVD, VCR,
listening to digital audio, CD, DVD audio, et cetera. The non-real
time data may be transmitted in large bursts with greater time
intervals between the bursts and still provide a continuous flow of
display data. Conversely, real time data is transmitted in smaller
bursts and more frequently.
[0153] As one of average skill in the art will further appreciate,
the memory 347 of multimedia server 132, or other memories in any
of the multimedia server shown, may enable the multimedia server to
function as a digital VCR. As such, live broadcasts may be captured
from a satellite connection, cable connection, NTSC broadcast, PAL
broadcast, HDTV broadcast and stored in memory for subsequent
playback.
[0154] As one of average skill in the art will further appreciate,
the multimedia server 132 may couple to one or more of the
multimedia sources shown. As such, multimedia server 132 may
include the functionality of any one or all of the multimedia
servers shown in FIGS. 1-4. Correspondingly, each client module
134-142 may include the functionality of one or more of the client
modules shown in FIGS. 1-4.
[0155] FIG. 11 illustrates an alternate schematic block diagram of
the multimedia communication systems shown in FIGS. 1-5. The
multimedia server 12, 42, 88, 102 and/or 132 includes a processing
module 360 and memory 362. The multimedia server is operably
coupled to receive one or more of multimedia sources. Such
multimedia sources include a plurality of channels 158 from a
satellite connection, cable connection, NTSC broadcast, PAL
broadcast, HDTV broadcast, compressed video 248 from a memory
device, camcorder, et cetera, DVD playback 82, VCR playback 86,
stored digital audio 104, CD playback 110, DCD audio playback 106,
radio reception 108, internet connection 44, and/or connection to
the public switch telephone network 66.
[0156] The processing module 360 may be a single processing device
or plurality of processing devices. Such a processing device may be
a microcontroller, microprocessor, microcomputer, central
processing unit, digital signal processor, programmable gate array,
state machine, logic circuitry, and/or any device that manipulates
signals (analog and/or digital) based on operational instructions.
The memory 362 may be a single memory device or a plurality of
memory devices. Such a memory device may be a read-only memory,
random access memory, system memory, flash memory, magnetic tape
memory, programmable memory, erasable memory, and/or any device
that stores digital information. Note that when the processing
module 360 implements one or more of its functions via a state
machine or logic circuitry, the memory storing the corresponding
instructions is embedded within the circuitry comprising the state
machine or logic circuitry. The functions performed by processing
module 360 and stored in memory 362 are generally described in the
logic diagrams of FIGS. 24-28, which will be discussed below.
[0157] In general, the multimedia server provides access for a
plurality of clients to one or more of the multimedia services by
receiving requests 182-190, 258-266, 298-306 and/or 320-328 from a
client module. The multimedia server processes the request to
produce packets of data 180, 268, 296 and/or 356 or multiplex
client data 230 depending on the type of request. In addition, the
client modules may provide packets of information 210-218, which
contain data for Internet connections, telephone connections,
and/or client-to-client communications. The multimedia server
processes packets as described generally with reference to FIGS.
1-10.
[0158] Client module 14-22, 46-54, 90-98, 112-120 and/or 134-142
includes a processing module 364 and memory 366. The client module
is operably coupled to a client 26, 28, 30, 32 and/or 34 to provide
display data 368. The display data may include audio data, video
data and/or text data. The type of display data 368 will depend on
the particular multimedia source being accessed for the client. The
processing module 364 may be a single processing device or a
plurality of processing devices. Such a processing device may be a
microprocessor, microcontroller, microcomputer, central processing
unit, programmable gate array, state machine, logic circuitry,
digital signal processor, and/or any device that manipulates
signals (analog and/or digital) based on operational instructions.
The memory 366 may be a single memory device or a plurality of
memory devices. Such a memory device may be a read-only memory,
random access memory, erasable memory, flash memory, magnetic tape
memory, system memory, and/or any device that stores digital
information. Note that when processing module 364 implements one or
more of its functions via a state machine or logic circuitry, the
memory storing the corresponding operational instructions is
embedded within the circuitry comprising the state machine and/or
logic circuit. The functions performed by processing module 364 and
stored in memory 366 are described in greater detail with reference
to FIGS. 52-62 and have been generally described with reference to
FIGS. 1-10.
[0159] FIG. 12 illustrates a more detailed schematic block diagram
of multimedia server 12 of the multimedia communication system of
FIG. 1. The multimedia server 12 includes the tuning module 150,
the channel mixer 152, the transceiving module 154, and the control
module 156. The tuning module 150 includes a plurality of tuners
370-376, an encoding module 380, and a bus interface module 382.
The channel mixer 152 includes at least one stream parsing module
390, a memory controller 394, memory 392, a processor 396, and a
data transcoding module 388. The stream parsing module 390 includes
a plurality of bit stream modules 398-404.
[0160] In operation, the control module 156 provides the set of
channel select commands 160 to the tuning module 150. As shown,
each tuner receives an individual channel select command from the
control module 156. Alternatively, the control module 156 provides
a stream of data containing the channel select commands 160 to the
tuning module 150. The tuning module then would interpret the
stream of data to identify the particular commands being received
and then provide individual channel select commands to tuners
370-376. Each of the tuners 370-376 has its input coupled to
receive the plurality of channels 158.
[0161] The plurality of channels may be received via a satellite
connection, cable connection, NTSC broadcast, PAL broadcast, HDTV
broadcast, et cetera. Accordingly, each of the tuners 370-376 would
include a corresponding tuner functionality and construction. For
example, if the plurality of channels 158 is being received via an
NTSC broadcast, each of the tuners includes a television encoder to
isolate one of the plurality of channels and produce digitized
video as an output. Alternatively, if the plurality of channels 158
is received via a satellite connection, each of the tuners includes
a satellite tuner as found in commercially available satellite
receivers. The satellite tuner outputs, in MPEG 2 format, one or
more channels of the plurality of channels. Similarly, for HDTV,
cable TV, et cetera the tuners would be of a construct
corresponding to the particular source of the plurality of
channels. Since the construct of such tuners for each of the
sources is known, no further discussion will be presented for the
tuners except to further illustrate the concepts of the present
invention.
[0162] Each tuner 370-376 outputs a selected channel 384 and
provides it to the encoding module 380. The encoding module 380
encodes each of the selected channels 384 based on the encoding
scheme used by the multimedia server 12 to produce encoded channel
data 386. The encoding scheme may be one or more of multilevel
encoding, non-return to zero encoding, Manchester encoding, block
encoding and/or nB/mB encoding where in n>m. For example, the
nB/mB may be 4B/5B encoding where 4 bits of actual data are
converted into 5 bits of encoded data. In addition, the encoding
attaches a header portion, which identifies the particular channel.
The encoded channel data 386 is placed on a bus coupling the tuning
module 150 to the channel mixer 152 by a bus interface module
382.
[0163] The bus interfacing module 382 places the encoded channel
data 386 on the bus in accordance with the particular data
transport scheme used within multimedia server 12. For example, the
data conveyance protocol may be carrier sense multi-access, TDMA,
et cetera.
[0164] The channel mixer 152 is operably coupled to receive the
encoded channel data 386 from tuning module 150. The channel mixer
152 receives the encoded channel data 386 via the stream parsing
module 390. The stream parsing module 390 includes a plurality of
bit stream modules 398-404. Each of the bit stream modules 398-404
monitors the bus for data corresponding to a particular channel of
interest. Accordingly, each of the bit stream modules 398-404 is
allocated to process data related to a particular client module.
For example, bit stream module 398 may be allocated to process data
for client module 14 of FIG. 1, while bit stream module 400 is
allocated to process data for client module 16 of FIG. 1, et
cetera.
[0165] Each bit stream module 398-404 includes a bus interface
module (not shown) to monitor the bus to detect the identity the
relevant data. As one of average skill in the art will appreciate,
alternatively, the channel mixer 152 may include a bus interface
module that provides a single connection to receive all of the
data, wherein the bus interface module interprets the data and
provides it to the appropriate bit stream module 398-404. Each of
the bit stream modules 398-404 isolates data of its corresponding
channel of interest 406 and provides the data to memory 392 via
memory controller 394.
[0166] As the data corresponding to each channel of interest 406 is
stored in memory 392, the processing module 396 is converting the
channel of interest 406 from its original format into generic data.
The processor 396 causes the generic data to be stored in memory
392 via memory controller 394. For example, if the channel of
interest corresponds to video data received from one of the
multimedia sources, the processor converts the specific formatted
video data (e.g., MPEG II) of the multimedia source into a generic
video data. Such generic video data may be formatted as MPEG video
data, JPEG data, M-JPEG video data, digital RGB data and/or digital
YCBCR data.
[0167] If the data for the channel of interest is audio data, the
processor 396 converts the formatted of audio data from its
original format into generic audio data, such as MPEG formatted
audio data, MP3 formatted data, and/or PCM digitized audio
data.
[0168] The data transcoding module 388 retrieves the generic data
392 from memory via the memory controller 394 to produce a stream
of channel data 166. If the generic data is generic video data, the
transcoding module 388 converts the generic video data into a
specific video data format, such as MPEG II, to produce the stream
of channel data 166. If, however, the generic data includes generic
audio data, the data transcoding module 388 converts it into a
specific audio format, such as MP3. If the data is Internet data,
telecommunication data, and/or client-to-client communication data,
the transcoding module 388 provides the data unaltered as part of
the stream of channel data 166.
[0169] The transceiving module 154 receives the stream of channel
data 166 and processes it to produce packets of channel data 180.
The processing performed by the transceiving module 154 is in
accordance with the data conveyance protocol of the multimedia
server. As such, the processing adds overhead information to
identify the particular portions of the stream of channel data 166
that is destined for individual client modules.
[0170] FIG. 13 illustrates a more detailed schematic block diagram
of multimedia server 42 of the multimedia communication system of
FIG. 2. As shown, the multimedia server 42 includes a modem
interface 202, processing module 204, memory controller 418,
transceiving module 208, memory 206, and video graphics processing
applications 420. The modem interface 202 is operably coupled to a
modem 426, which provides the network connection 200. Note that the
modem 426 may be an xDSL modem, a wireless modem, a 56K modem, a
cable modem, an ISDN modem, or a connection to a home network. In
addition, the modem interface 202 provides coupling to the public
switch telephone network 66. As one of average skill in the art
will appreciate, the multimedia server 42 may provide one or more
of the functions of an Internet connection, connection to the
public switch telephone network, and client-to-client
communications.
[0171] The video graphics processing applications 420 may be
software applications stored in memory 206 and executed by
processing module 204. Alternatively, the video graphics process
applications 420 may be executed by a single or multiple video
graphics processors operable coupled to memory controller 418. In
any implementation, the video graphics process applications 420
prepare video data for display on a CRT, LCD panel, et cetera.
[0172] The memory 206 stores a plurality of software applications
including client service software 416, cordless telephone software
422, client-to-client software 424, modem allocation software 414,
a plurality of web browser applications 410, and a plurality of
email applications 412. The memory 206 also stores client display
data 422. The client display data 422 is processed by the video
graphics process applications 420 to produce outgoing display
data.
[0173] In operation, the transceiving module 208 receives packets
210-218 from the plurality of client modules. Initially, the
packets 210-218 include header information that identifies the
particular client, information indicating that this is a service
request packet, and its payload includes identity of the particular
service being requested. The particular service being requested may
be accessed to the Internet, participating in a telephone
conversation via the PSTN, and/or client-to-client
communications.
[0174] When the packets are received by the multimedia server, the
transceiving module 208 removes the physical layer overhead
information from the packets and provides retrieved requests 220 to
memory controller 418. Memory controller 418 causes the retrieved
requests 220 to be stored in memory 206. The processing module 204
retrieves the retrieved requests 220 to initiate processing of the
requests. For requests indicating a particular type of service, the
processing module 204 interprets the request to identify the
service being requested. As an alternative to routing received
request packets through memory controller 418, the receive request
packets may be placed in a buffer and directly accessed by
processing module 204 from the buffer.
[0175] The processing module 204 evokes the client service software
416 to interpret the received packets to identify whether the
packets are requesting a particular type of service, what that
service is, and/or identifying the packets as data packets. If the
processing module 204 determines, via the client software 416, that
the request is for a telephone conversation via the PSTN 66, the
processing module 204 evokes the cordless phone software 422. If,
however, the request is for client-to-client communication, the
processing module 204 evokes the client-to-client software 424. If,
however, the request is for access to the Internet, the processing
module 204 evokes either an email application 412 or a web browser
application depending on the particular type of access being
requested.
[0176] For client-to-client communications, the transceiving module
208 receives packets containing communication data. The packets
will be processed by the transceiving module to remove the physical
layer overhead and provide the receive packets 220 to memory
controller 418. The receive packets will be stored in the memory
206. The processing module 204, via the client-to-client software
424, retrieves the client-to-client communication data from memory
206 and processes it to produce client-to-client data 236. The
processing module 204 provides the client-to-client data 236 to the
memory controller 418 for storage in memory 206. The transceiving
module 208 causes the memory controller 418 to retrieve the
client-to-client data 236 from memory 206 and provide it as client
data 228. The transceiving module 208 multiplexes the client data
228 for the client-to-client communication with other services
being supported for the client modules to produce multiplex client
data 230. The multiplex client data also includes the physical
layer overhead to identify the individual packets once received by
the client modules.
[0177] If the service request is for a telephone conversation via
the PTSN 66, the processing module 204 evokes the cordless phone
software 422. Accordingly, as the processing module 204 retrieves
receive packets 220 from memory 206, it performs the cordless phone
software 422 upon the data. In essence, the cordless phone software
422 causes the multimedia server 422 to act as a base station while
the client module and/or client acts as the cordless handset. The
telephone functionality utilizes a dual tone multi-frequency (DTMF)
signaling for keying in the numbers. The transmission rate between
the multimedia server 42 and the handset may utilize traditional
900 Mhz cordless phone frequencies, 2.4 gigahertz frequencies,
and/or CDMA (code division multiple access) technology.
[0178] The processing module 204, upon processing the receive
packets 220, produces network data 224 which is provided to the
modem interface 202. The modem interface provides the network data
224 to the PSTN 66. Accordingly, the processing module 204 includes
an identifier within the network data 224 such that the modem
interface 202 knows to provide it to the PSTN 66 as opposed to the
modem 426.
[0179] For incoming telecommunication data, the modem interface 202
provides the data as received network packets 226 to the processing
module 204. The processing module 204 while performing the cordless
phone software 422 processes the receive network packets 226 to
produce client data 228. The client data 228 is temporarily stored
in memory 206 before being transmitted to the clients as part of
the multiplex client data 230 by the transceiving module 208.
[0180] If the requested service is to access to the Internet, the
packets 210-218 received by the transceiving module 208 are
temporarily stored in memory 206 as received packets 220. The
processing module 204 evokes either the email application 412 or
the web browser application 410 depending on the particular type of
Internet access requested. For web browsing access, the processing
module 204 accesses the web browser application 410. For email
Internet access, the processing module 204 evokes the email
application 412. The email applications 412 and web browser
applications 410 are known, thus no further discussion will be
provided as to their functionality except to further illustrate the
concepts of the present invention.
[0181] For web browser access, the processing module 204 evokes the
web browsing application 410 to process the received packets 220.
Such processing yields network data 224, which is provided to the
modem interface 202. The modem interface provides the network data
224 as outbound modem data 234.
[0182] Responses from the Internet are received by modem 426 and
provided to the modem interface 202 as inbound modem data 232. The
modem interface 202 provides the inbound modem data 232 as received
network packets 226 to the processing module 204, while executing
the web browser application 410 produces processed packets which
are stored in memory 206. The video graphics process application
420 retrieves the processed packets from memory 206, and performs
its associated video graphics processing to produce client display
data 422. The memory controller 418 retrieves the client display
data 422 and provides it as client data 228 to transceiving module
208. The transceiving module processes the client data 228 to add
physical layer overhead information and multiplexes it with other
client data being processed, and transmits the multiplex client
data to the client modules.
[0183] For email Internet access, the processing module 204 evokes
the email application 412 to process the receive packets 220. The
processing yields network data 224 that is provided to the modem
426 as outbound modem data 234 via the modem interface 202. Email
responses are received by modem 426 and provided as inbound modem
data 232 to the modem interface 202. The modem interface 202
provides the receive data as received network packets 226 to the
processing module 204. The processing module 204 performs the email
application 412 upon the received network packets 226 to yield the
processed data. The processed data is stored in memory 206 and
accessed by the video graphics processing application 420. The
video graphics processing application 420 performs a video graphics
processing function upon the processed data to produce client
display data 422. The client display data 422 is subsequently
retrieved by memory controller 418 and provided as client data 228
to the transceiving module 208.
[0184] When only one client is accessing the Internet, the client
has exclusive access to modem 426, such that no allocation of the
network connection is needed. In addition, when only one client is
accessing the Internet, only one email application and/or one web
browser application is open for the client. Once, however, two or
more clients are accessing the Internet, the processing module
evokes an email application and/or web browser application for each
client. In addition, the processing module 204 may be executing
multiple email applications and/or multiple web browser
applications for multiple clients. When this is the case,
allocation of the modem needs to be shared amongst the clients
accessing the Internet. To do this, the processing module 204
evokes the modem allocation software 414.
[0185] The modem allocation software 414 allocates access to modem
426 among the plurality of clients. The modem allocation software
may be based on a TDMA function, a CSMA function, token ring
passing, polling function, et cetera. Accordingly, the processing
module 204 provides access to the particular client based on the
modem allocation software 414 such that each client has
substantially equal access to the Internet.
[0186] As one of average skill in the art will appreciate, by
storing the email applications 412 and web browser applications 410
within the multimedia server 42, the clients appear to have
independent access to the Internet, while in actuality it is shared
amongst a plurality of clients. The video graphics processing
applications 420, in combination with the email applications and/or
web browser applications 410, cause the data corresponding to the
processing of the applications to appear as if the client device
was processing the applications. As one of average skill in the art
will further appreciate, if the client device includes video
graphics processing, which is typically included in a personal
computer, then the video graphics processing application 420 may be
bypassed within the multimedia server 442. Accordingly, the
processed data by the web browser application 410 or email
application 412 may be packetized, without producing the client
display data 422 and provided as client data 228 to the respective
client device. The respective client device would then perform its
own video graphics process of data to produce the display data. The
overall functionality of multimedia server 42 will be described in
greater detail with reference to FIGS. 57-62.
[0187] FIG. 14 illustrates a schematic block diagram of multimedia
server 88 of the multimedia communication system of FIG. 3. The
multimedia server 88 includes tuning module 240, channel mixer 242,
transceiving module 246, and control module 244. The tuning module
240 includes a plurality of multiplexors 430-434, an encoding
module 380 and a bus interface module 382. The channel mixer 242
includes at least one stream parsing module 391, memory controller
394, memory 392, processor 396 and a data transcoding module
388.
[0188] In operation, the control module 244 receives select request
250 from the client modules and produces therefrom a set of select
commands 252. Each of the select commands is provided to one of the
multiplexors 430-434. The multiplexors 430-434 each have its inputs
coupled to single channel video sources such as a DVD player 82,
VCR 86, compressed video source 248, closed circuit television,
laser disk player, camcorder, et cetera. Each of the multiplexors
430-434 outputs one of the single channel multimedia sources as a
selected channel 436 based on the respective select command
252.
[0189] The encoding module 380 receives the selected channels 436
from each of the multiplexors 430-434 and encodes the selected
channels to produce encoded channel data 438. The encoding scheme
used by encoding module 380 may be multilevel encoding, non-return
to zero encoding, Manchester encoding, block encoding, nB/mB
encoding where n<m. The encoded channel data 438 is provided to
the channel mixer 242 as a set of channels 254 via the bus
interface module 382. As one of average skill in the art will
appreciate, the tuning module 240 has each of the multiplexors
430-434 processing requests from an individual client module. For
example, if only one client module is accessing a single channel
multimedia source, only one multiplexor is evoked to produce the
selected channel. As more and more clients access single source
multimedia devices, more and more multiplexors are evoked. If
multiple clients are accessing the same multimedia source, such as
DVD player 82, only one multiplexor is evoked wherein the
processing of the selected channel for multiple clients includes
the identity of the multiple clients and/or the selected channel
such that each of the clients accessing the same single channel
multimedia source will receive the same data.
[0190] The channel mixer 242 receives the set of channels 254 via
its stream parsing module 391. In particular, each of the bit
stream modules 440-446 is monitoring the bus for data related to
the particular channel of interest 448 it is processing.
Accordingly, each bit stream module 440-446 is processing data for
a particular client module. Each bit stream module 440-446 receives
the set of channels 254 and produces a respective channel of
interest 448. As such, the bit stream modules 440-446 filter out
the data of all other channels but the channel of interest. The
data corresponding to each channel of interest 448 is stored in
memory 392 via memory controller 394.
[0191] Processor 396 retrieves the data for each channel of
interest 448 and converts the specific formatted video data into a
generic video data. The generic video data is stored in memory 392
via memory controller 394.
[0192] The data transcoding module 388 retrieves the generic video
data from memory 392 and produces therefrom a stream of channel
data 256. The processing performed by the data transcoding module
388 includes converting the generic video data into specific
formatted video data. The specific formatted video data comprises
the stream of channel data 256.
[0193] The transceiving module 246 receives the stream of channel
data 256 and produces therefrom packets of data 268. The
transcoding module 246 adds the physical layer overhead of the
particular data conveyance protocol used by the multimedia
communication system to produce the packets of data 268.
[0194] FIG. 15 illustrates a schematic block diagram of multimedia
server 102 used in the multimedia communication system of FIG. 4.
The multimedia server 102 includes tuning module 208, channel mixer
282, transceiving module 286, and control module 284. The tuning
module 280 includes multiplexors 456-460, tuners 450-454, an
encoding module 464 and a bus interface module 382. The channel
mixer 282 includes at least one stream parsing module 392, memory
controller 394, memory 392, processing module 396, and a data
transcoding module 388.
[0195] In operation, the control module 284 receives select request
288 from a plurality of client modules. The control module 284
processes the select request 288 to produce a set of select
commands 292. The select commands are provided to one or more of
the plurality of tuners 450-454 and/or the plurality of
multiplexors 456-460. The plurality of tuners 450-454 have a radio
receiver 108 operably coupled to its inputs, where the radio
receiver may be an antenna for receiving AM and/or FM radio
transmissions. The tuners 450-454 are constructed of conventional
circuitry to tune into a particular radio station from a plurality
of radio stations. The construct of such tuners is known, as such
no further discussion of the functionality or construct of the
tuners 450-454 will be described except to further illustrate the
present invention.
[0196] Based on the respective select command, each tuner 450-454
selects a particular channel of the radio channels received. The
output of each tuner is an input for each of the multiplexors
456-460. Each of the multiplexors 456-460 also includes an input
for other single audio channel multimedia sources. Such single
audio channel multimedia sources include CD players 110, DVD audio
players 106, digital audio storage devices 104, et cetera.
[0197] Based on the respective select commands 292, each of the
multiplexors 456-460 outputs a particular selected channel 462.
Accordingly, the selected channel 462 may be one of the single
audio channel multimedia sources or the output of one of the
plurality of tuners 450-454.
[0198] The encoding module 464 receives the selected channels 462
and encodes them to produce encoded channel data 468. The encoding
performed by encoding module 464 may be one or more of multilevel
encoding, non-return to zero encoding, Manchester encoding, block
encoding, nB/mB encoding where n<m. The encoded channel data 468
is provided to the channel mixer 282 via the bus interface module
382.
[0199] The channel mixer 282 receives the encoded channel data 468
as a set of channels 294. The stream parsing module 392 includes a
plurality of bit stream modules 470 through 476, which receive the
set of channels 294 and extracts data related to a particular
channel of interest 478. Accordingly, each bit stream module
470-476 is supporting a particular channel selection request of a
particular client module. Each of the bit stream modules 470
filters out the data of other channels such that only the data of
the channel of interest is passed. The data corresponding to the
channels of interest 478 is stored in memory 392 via memory
controller 394.
[0200] The processing module 396 retrieves the data corresponding
to the channels of interest 478 from memory 392 and converts the
specific formatted audio data into generic formatted audio data.
The generic formatted audio data is stored in memory 392. Such
generic formatted audio data may be PCM digitized audio, MP3 audio,
MPEG audio, et cetera.
[0201] The transcoding module 388 retrieves the generic audio data
from memory and converts it into a specific audio format. Such
specific audio format may be MP3 audio, MPEG audio, et cetera. The
data transcoding module 388 provides the specific audio formatted
data of a stream of channel data 290 to the transceiving module
286. As one of average skill in the art will appreciate, the data
transcoding module 388 may process the audio data from audio
sources in a similar manner as it processes audio data from
multimedia sources such as a DVD player, CD player, satellite
connection, et cetera.
[0202] The transceiving module 286 converts the stream of channel
data 290 into packets of data 296. The transceiving module utilizes
the data conveyance protocol of the multimedia communication system
to add physical layer overhead to the data of the stream of channel
data 290 to produce packets. The packets are then conveyed to the
plurality of client modules.
[0203] FIG. 16 illustrates a schematic block diagram of multimedia
server 132 that may be used in the multimedia communication system
of FIG. 5. The multimedia server 132 includes the transceiving
module 346 (not shown), the control module 344, the tuning module
340, the channel mixer 342, the processing module 345, and memory
347. The tuning module 340 includes a plurality of HDTV tuners 480,
a plurality of multiplexors 430-434, a plurality of audio tuners
450-454, a second plurality of multiplexors 456-458, a modem
interface 202, an audio encoding module 464, a video/audio encoding
module 380, and a bus interface module 382.
[0204] The channel mixer 342 includes a first plurality of stream
parsing modules 391, a second plurality of stream parsing modules
390, a third plurality of stream parsing modules 393, and a data
transcoding module 388. The multimedia server 132 may further
include, or be operably coupled to, components within the host
device. The host device may be a satellite receiver, cable box,
set-top box, home theatre receiver, HDTV tuner, et cetera. The host
device includes a host processor 482, a memory bridge 484, host
memory 486, and a hard drive 488. To interface with the host
components, the multimedia server 132 further comprises a direct
memory access (DMA) device 490.
[0205] In this configuration, the control module 344 receives
selection request via the host bus and produces therefrom a set of
commands 352. The set of commands are provided to individual ones
of the HDTV tuners 480, the multiplexors 430-434, the audio tuners
450-454, multiplexors 456-460, and/or the modem interface. As such,
each of the elements of the tuning module will respond to an
individual selection command accordingly.
[0206] If an HDTV tuner 480 receives a select command 352, it
selects a particular channel from a satellite or cable source 488.
The selected channel is provided to the encoding module 380. If one
of the multiplexors 430-434 receives a select command, it outputs
one of the single channel multimedia video sources such as a DVD
player 82, compress video 248, VCR 86. The output of the
multiplexor 430-434 is provided to encoding module 380. The
encoding module 380 converts the audio and video data of the single
channel into encoded data as previously discussed.
[0207] If one of the audio tuners 450-454 receives a select
command, it selects a particular radio channel from a plurality of
radio channels of radio receiver 108. The output of the tuner is
provided to encoding module 464. If one of the multiplexors 456-460
receives a select command, it provides its output to the encoding
module 464. As shown, the inputs to the multiplexors 456-460
include DVD audio 106, digital audio storage 104 and CD 110. The
encoding module 464 encodes the received audio data of a selected
channel as previously discussed.
[0208] The outputs of encoding module 380 and 464 are provided to
the bus interface module 382. The bus interface module provides the
encoded data to the channel mixing circuit. In addition, the bus
interface module 382 is operably coupled to the modem interface 202
and to the public switch telephone network 66. The modem interface
and PSTN connection provide the multimedia server 132 the ability
to service clients as previously described with reference to FIGS.
2, 7 and 13.
[0209] The stream parsing modules 390, 391 and 393 receive the
encoded channel data and filter the encoded channel data down to a
particular channel of interest. The data corresponding to the
particular channel of interest is stored in memory 347 via memory
controller 394. The processing module 345 retrieves the data of the
channels of interest from memory 347 and converts the data into
generic audio data and/or generic video data. The generic audio
and/or video data is stored in memory 347.
[0210] The data transcoding module 388 retrieves the generic audio
and/or video data from memory 347 and converts it into a specific
audio format, which is then provided as a stream of data to the
transceiving module 346 for conveyance to the plurality of
clients.
[0211] The hard drive 488 may store the digital audio, which is
provided as digital audio storage 104. Accordingly, the digital
audio may be stored in an MP3 format, PCM audio, and/or any means
for digitizing for storing digital audio signals. In addition, the
hard drive 488 may function as a digital VCR such that any of the
channels of the multimedia sources may be stored in hard drive 488
and subsequently played back. Accordingly, host memory 486 would
include the appropriate software to enable host processor 482 to
retrieve the data from hard drive 488 as a digital VCR.
[0212] FIG. 17 illustrates a functional diagram of a tuning module,
which may be used in any of the multimedia servers as described in
the previous figures. While the functional diagram of FIG. 17
relates to processing data utilizing an HDTV tuner, the principles
are common for processing data from any multi-channel multimedia
source. For example, the plurality of channels 36 shown in FIG. 17
may correspond to channels received by a satellite connection,
cable connection, NTSC connection, PAL connection, broadcast
connection, radio receiver connection, et cetera.
[0213] As shown in FIG. 17, a plurality of channels 36 includes a
channel identifier and the corresponding audio and/or video data.
In this illustration, channel 001 includes channel 001 audio and
video data, channel 002 includes channel 002 audio and video data,
et cetera. As also illustrated, channel 002, channel 004 and
channel 901 have been selected by different clients to be viewed.
Accordingly, the set of channel selection commands 160 identifies
these particular channels.
[0214] HDTV tuners 376, 374 and 480 each process one of the channel
select commands. As shown, HDTV tuner 376 is processing the channel
select command for channel 002, HDTV tuner 374 is processing the
channel select command for channel 004 and HDTV tuner 480 is
processing the channel select command for channel 901. As shown,
each HDTV tuner 376 receives all of the plurality of channels 36.
The output of each HDTV tuner 376 is of its corresponding selected
channel. As shown, HDTV tuner 376 is outputting audio and video
data 500 for channel 002, HDTV tuner 374 is outputting audio and
video data 502 for channel 004 and HDTV tuner 480 is outputting
audio and video data 503 for channel 901.
[0215] The audio/video data 500 for channel 002 includes a
plurality of frames 504-518. Each frame may correspond to an I
frame, a B frame, and/or a P frame of MPEG video data. The
audio/video data 500 of channel 002 is provided to encoding module
380. Similarly, audio/video data 502 of channel 004 includes a
plurality of frames 520-534 and audio/video data 503 of channel 901
includes a plurality of frames 540-554.
[0216] The encoding module 380 encodes the audio/video data 500,
502 and 503 of the respective channels. The resulting data is
encoded channel data 386, which includes a plurality of packets
560, 566, and 572. As one of average skill in the art will
appreciate, the packets 560, 566 and 572 may also be frames
depending on the data conveyance protocol used within the
multimedia communication system. For packet based transmission,
which is illustrated in FIG. 17, the encoding module 380 packetizes
data from each of the selected channels (for this example, channel
002, 004 and 901) in a round-robin fashion. As one of average skill
in the art will appreciate, other schemes may be used to determine
which data of a particular channel of interest will be processed
and in what order. For example, one channel may have priority over
another, which may be the case for real time transmissions versus
non-real time data transmissions.
[0217] In this illustration, packet 560 includes a header portion
564 and a data payload 562. The header section 564 may include
identity of the selected channel, type of data of the selected
channel, identity of the multimedia source, an indication as to
whether the data is encrypted or not, an indication of the type of
encryption, an indication as to whether the data is compressed or
not, an indication of the type of compression, and/or a packet
sequence number. Accordingly, the header information 564 includes
all the necessary information for the client modules to accurately
retrieve the data contained in payload 562. As shown, a first
portion of frame 504 of the audio/video data 500 for channel 002 is
included in payload 562.
[0218] Packet 566 includes header information 568 and a payload
570. The header information 568 includes similar information as
header 564 but directed towards data related to audio/video data
502. The payload section 570 carries data from a first portion of
frame 520 of audio/video data 502. Packet 572 includes header 574
and payload 576. The header 574 includes similar header information
as 564 but directed towards the audio/video data 503. The payload
576 includes a portion of frame 540.
[0219] The next three packets encoded by encoding module 380 will
be for the second portion of each of frames 504, 520 and 540. The
encoding module will continue to packetize portions of frames 504,
520 and 540 until the entire frame has been conveyed. Once the
entire frame has been conveyed, the encoding module 380 encodes
sections of the next frame in the sequence of the audio/video data
500, 502 and 503. The encoded channel data 386 is then conveyed as
packets utilizing carrier sense multiple access (CSMA), CSMA with
collision avoidance, and/or CSMA with collision detection.
[0220] While FIG. 17 is illustrated with respect to packetizing the
encoded channel data 386, one of average skill in the art will
appreciate that the encoding module 380 may utilize a TDMA concept
wherein the encoded channel data 386 is prepared as frames.
Accordingly, packets 560, 566 and 572 will be replaced by frames
where each frame includes a header section and a data section. The
header section includes one or more of the identity of the selected
channel, the type of data of the selected channel, the identity of
the multimedia source, an indication as to whether encryption is
enabled or disabled, the type of encryption used, an indication as
to whether compression is enabled or disabled, an indication of the
type of compression, and a frame number. As such, the header
information and the timing of the frames includes sufficient
information such that the client modules may accurately retrieve
the data contained in the respective data sections or payloads.
[0221] The encoded channel data 386 is then conveyed in frames in
accordance with time division multiplexing, and/or frequency
division multiplexing.
[0222] FIG. 18 illustrates a functional diagram of the channel
mixer that may be used in any one of the multimedia servers of
FIGS. 1-11. As shown, a set of channels 162 is received as encoded
channel data 386. The encoded channel data 386 includes a plurality
of packets 560, 566 and 572. Each packet 560, 566 and 572 includes
a header section 564, 568, 574 and a payload section 562, 570 and
576, respectively.
[0223] The channel mixer includes a plurality of stream parsing
modules 390A, 390B and 390C operably coupled to respective bus
interfaces 580-584. The respective bus interfaces 580-584 are
receiving each of the plurality of packets and reading the header
section. When the bus interface module 580-584 detects that the
particular packet relates to the specific channel select request
586, 588 or 590, the bus interface provides the payload section and
a portion of the header section to the remaining circuitry of the
stream parsing module 390A, 390B and/or 390C.
[0224] Each of the stream parsing modules 390A, B and C are
extracting data 592, 594 and 596 from the payload of packets
corresponding to the specific channel select request 586, 588 and
590. The data 592, 594 and 596 is stored in memory 392 until the
entire video frame 504, 520 and/or 540 is stored.
[0225] Once each of the video frames 504, 520 and 540 is stored,
processor 396A, B and/or C retrieves the respective data of the
corresponding video frame 504, 520 or 540 from memory and converts
it into generic data 598, 600, 602. The generic data is stored in
memory 392. The data transcoding module 388 retrieves the generic
data 598, 600, 602 from memory 392 and converts it into a specific
video and/or audio data format and conveys the converted data as a
stream of channel data 166 to the plurality of clients.
[0226] As one of average skill in the art will appreciate, the
processors 396A, B and C may process the data of the video frames
504, 520 and 540 as the data 592, 594 and 596 is being stored in
memory. In other words, the processors do not have to wait until
the entire video frame is stored to begin converting the data into
the generic data 598, 600 and 602.
[0227] While FIG. 18 is illustrated with respect to receiving
packets of encoded channel data 386, one of average skill in the
art will appreciate that the packets may be frames of data.
Accordingly, the bus interface modules 580-584 would monitor the
bus for frames of data to be processed by the respective stream
parsing modules 390A, B or C. The determination of the particular
frames to retrieve is based on the specific channel select request
586, 588 or 590. Accordingly, any data related to the specific
channel select request 586, 588, 590 is obtained by the
corresponding stream parsing module 390A, B or C and converted into
data 592, 594 or 596.
[0228] FIG. 19 illustrates a functional diagram of the tuning
module of any of the multimedia servers of FIGS. 1-11 processing
single video channel multimedia sources. As shown, multiplexors
430-434 are operably coupled to receive video data from a plurality
of single channel multimedia sources. Such single channel
multimedia sources include DVD players, compressed video storage
devices, VCRs, camcorders, etc. As shown, video frames 614 from a
DVD player 82 are provided to each of the multiplexors 430-434 as
well as MPEG frames 612 of compressed video 248 and digitized video
data 610 from a VCR 86. Each of the multiplexors 430-434 is
processing a separate channel selection request. As illustrated,
multiplexor 430 is processing a channel select request for
providing video frames 614 related to the DVD player 82,
multiplexor 432 is processing MPEG frame 612 from a compressed
video source 248, and multiplexor 434 is processing the digitized
video data 610 from a VCR 86.
[0229] As shown, the video frame 614 includes a plurality of frames
616-630. The MPEG frame 612 include a plurality of frames 632-646,
while the digitized video data 610 includes a stream of digitized
video data 648.
[0230] The encoding module 380 receives the video frame 614, the
MPEG frame 612, and the digitized video data 610 and encodes the
data of these sources to produce the encoded channel data 438. This
may be done in a packetized manner wherein packets 648, 650 and 652
are generated to include a header section 654, 658 and 662 and a
payload section 656, 660 and 664, respectively.
[0231] The encoding module 380 encodes a portion of frame 616 into
the payload 656 of packet 648. Similarly, the encoding module 380
encodes a portion of the digitized video data 648 into the payload
660 of packet 650. The encoding module 380 also encodes a portion
of frame 632 of MPEG frame 612 into payload 664 of packet 652. The
header sections 654, 658 and 662 include header information as
previously described with reference to FIG. 17 to enable the client
modules to accurately retrieve the corresponding data.
[0232] While FIG. 19 is illustrated with respect to transmitting
the encoded channel data 348 as packets 648, 650 and 652 utilizing
a CSMA type physical layer transmission, the packets 648, 650 and
652 may be frames of data that are transmitted utilizing TDMA
and/or FDMA physical layer data conveyance techniques. As such, the
encoded channel data 438 may include a plurality of packets where
each packet includes a portion of one of the video data from one of
the plurality of multimedia sources and/or frames of data from one
of the plurality of multimedia sources.
[0233] FIG. 20 illustrates a schematic block diagram of the
multimedia communication system of FIGS. 1-5 wherein the
communication path 192 is a wire line connection 670. As shown, the
tuning module 150, 240, 280 and/or 340 of the multimedia server
receives audio/video source inputs 674. The audio/video source
input 674 may be from one or any of the multimedia sources
described in any of the preceding drawings. The tuning module
selects the particular channels from the audio/video sources based
on select commands received from control module 156, 244, 284
and/or 344.
[0234] The control module generates the select commands based on
select request received via the transceiving module 154, 208, 246,
286 and/or 346. The channel mixer 152, 242, 282 and/or 340 receives
the output of the tuning module and generates therefrom data for
one or more of the client modules.
[0235] The multimedia server also includes processing module 204
and/or 345 to process communication via telecom sources 676. The
telecom sources include Internet connection, PSTN connection and/or
client-to-client communications.
[0236] The transceiving module 154, 208, 246, 286 and/or 346
includes a router 672. The router provides the connectivity to each
of the client modules 14-22, 46-54, 90-98, 112-120 and/or 134-142.
The construct and functionality of a router, such as router 672, is
known, thus no further discussion will be presented except to
further illustrate the concepts of the present invention.
[0237] With the communication path 192 being a wire line
connection, the stream of channel data and the select request are
transceived utilizing a type of transceiving. The type of
transceiving may be time division multiplexing, frequency division
multiplexing, pulse code modulation, amplitude shift keying, phase
shift keying, quadrature phase shift keying, quadrature amplitude
modulation, carrier sense multiple access (CSMA), CSMA with
collision avoidance and/or CSMA with collision detection.
Accordingly, such a wire line connection 670 transmits and receives
data over the same twisted pair, coaxial cable, in-home network,
telephone lines, et cetera.
[0238] Alternatively, the wire line connection 670 may include a
transmit wire line connection and a receive wire line connection.
The stream of channel data is transmitted via the transmit wire
line connection using a type of transmission. The type of
transmission includes time division multiplexing (TDM), frequency
division multiplexing (FDM), pulse code modulation (PCM), amplitude
shift keying (ASK), phase shift keying (PSK), quadrature phase
shift keying (QPSK), quadrature amplitude modulation (QAM), carrier
sense multiple access (CSMA), CSMA with collision avoidance (CA),
and/or CSMA with collision detection (CD). The received wire line
communication path may be utilized to receive the channel selects
from the client modules. The receive wire line connection uses a
type of reception that may be TDM, FDM, PCM, ASK, PSK, QPSK, QUM,
CSMA, CSMA with CA and CSMA with CD.
[0239] Alternatively, if the multimedia communication system is
supporting Internet connections, the transmit wire line connection
and receive wire line connections are conveying data related to the
telecom sources 676. Such data includes packets destined for the
Internet, received packets from the Internet, telecommunication
data destined for the PSTN, data received from the PSTN, and/or
client-to-client communication data.
[0240] As shown, the router 672 is operably coupled to the channel
mixer, the tuning module and to the control module. The router is
also operably coupled to at least one of the client modules. With
such a configuration, the control module causes the stream of
channel data from the channel mixer to be formatted based on the
type of transceiving to produce formatted channel data. The router
provides the formatted channel data to the client modules via the
wire line connection. The particular type of formatting used by the
channel mixer is based on the type of transceiving, which was
previously described. In addition, the selection request received
by the client modules will be formatted in accordance with the type
of transceiving such that when the router receives it, the router
appropriately de-formats the data to recapture the particular
selection request. The same applies whether the wire line
connection 670 is a single path that transceives data or includes a
receive and a transmit path.
[0241] FIG. 21 illustrates a schematic block diagram of the
components of a multimedia server being operably coupled to client
modules via a communication path that is a radio frequency (RF)
communication path 680. To facilitate the communications via the RF
communications via the RF communication path 680, the transceiving
module 154, 208, 246, 286 and/or 346 of the multimedia server
includes an RF transceiving switch 678. Similarly, each of the
client modules would include an RF transceiving switch, an RF
receiver, and/or and RF transmitter. The particular radio
frequencies use would be dictated by governmental agencies, such as
the Federal Communications Commission (FCC). Typically, such
in-home frequencies range from the hundreds of megahertz to single
digit gigahertz frequency ranges. One particular type of RF in-home
application may be dictated by ITC specification 802.11a. The
802.11a specification provides the operating parameters for using
radio frequencies for transceiving data within homes and/or over
short distances.
[0242] The RF communication path 680 may utilize a single frequency
to transceive data between the multimedia server and the clients,
may include a separate frequency for transmitting data and a
separate frequency for receiving data, may include a plurality of
frequencies for transceiving data, may include a plurality of
frequencies for receiving data and a separate plurality of
frequencies for transmitting data.
[0243] As shown, the RF transceiving switch 678 is operably coupled
to the processing module 204 and/or 345, the control module 156,
244, 284 and/or 344, the tuning module 150, 240, 280 and/or 340,
and the channel mixer 152, 242, 282 and/or 342. As configured, the
control module causes the stream of channel data, which is conveyed
via the RF communication path 680 to the client modules, to be
formatted based on the type of transceiving used. The type of
transceiving may be time division multiplexing (TDM), frequency
division multiplexing (FDM), pulse code modulation (PCM), amplitude
shift keying (ASK), phase shift keying (PSK), quadrature phase
shift keying (QPSK), quadrature amplitude modulation (QAM), carrier
sense multiple access (CSMA), CSMA with collision avoidance (CA)
and CSMA with collision detection (CD).
[0244] The RF transceiving switch provides the formatted channel
data to the clients during transmitting intervals via the radio
frequency path 680. The transmission and receiving intervals will
be described in greater detail with reference to FIG. 26.
[0245] The client module receives the formatted data via the RF
path then processes it as previously discussed and will be
subsequently discussed in greater detail with reference to FIGS.
50-56. In addition, the client module formats the selection request
based on the type of transceiving and then provides the formatted
selection request to the transceiving module via the RF
communication path 680. The RF transceiving switch 678 receives the
selection request and provides them to the control module. The
control module processes the selection request as previously
described and will be subsequently described in greater detail with
reference to FIGS. 24-28.
[0246] FIG. 22 illustrates a schematic block diagram of a
multimedia communication system that has the components of a
multimedia server operably coupled via an infrared communication
path 684 to a plurality of client modules. In this embodiment, the
transceiving module 154, 208, 246, 286 and/or 346 includes an
infrared transceiving switch 682. Similarly, each of the client
modules would include a similar IR transceiving switch. In this
embodiment, data is transmitted between the multimedia server and
client modules via a single IR communication path 684. As such, the
IR communication path is divided into transmit portions (i.e., from
the multimedia server) to the client modules, and receive portions
(i.e., from the client to the server). Alternatively, the IR path
may include a transmit IR path and a receive IR path.
[0247] As shown, the IR transceiving switch 682 is operably coupled
to the processing module, the control module, the tuning module and
the channel mixer. As configured, the control module causes the
stream of channel data, which is transmitted via the IR
communication path 684 from the transceiving module to the client
module, to be formatted based on the type of transceiving. As
previously mentioned, the type of transceiving includes TDM, FDM,
PCM, ASK, PSK, QPSK, QAM, CSMA, CSMA with CA, and CSMA with CD. The
particular data contained in the stream of channel data is based on
selection request received from the client module.
[0248] The client module formats the selection request in
accordance with the type of transceiving and conveys the formatted
selection requests during reception intervals via the IR
communication path 684 or transmits them via a separate receive IR
path. The transceiving module, upon receiving the selection
request, provides the selection request to the control module,
which provides commands to the tuning module, which selects the
appropriate channels from the AV sources 674 based on the
commands.
[0249] As one of average skill in the art will appreciate, the
communication path 192 between the multimedia server and the
plurality of clients may include one or more of the wire line
communication path 670 of FIG. 20, the RF communication path 680 of
FIG. 21 and the IR communication path 684 of FIG. 22. For example,
the transceiving path between each of the client modules may
utilize the RF communication path while the receiving path may be
an IR path. As a further example, the client modules within the
same physical location as the server may be operably coupled via a
wire line communication path while other client modules in
different locations within a home utilize an RF communication path.
Thus, a variety of communication path combinations may be utilized
within the same multimedia communication system to provide the
multimedia communication services.
[0250] FIG. 23 illustrates a schematic block diagram of a
multimedia server 700 that includes the tuning module 150, 240, 280
and/or 340, the channel mixer 152, 242, 282 and/or 340, the control
module 156, 240, 284 and/or 344, the transceiving module 154, 208,
246, 286 and/or 346, the processing module 204 and/or 345, and a
second transceiving module 690. The transceiving module 154, 208,
246, 286 and/or 346 includes an analog multiplexor 686. In addition
to performing the functions as previously described with reference
to the transceiving module, the analog multiplexor 686 converts the
stream of channel data into analog signals 688 representing the
stream of channel data. Accordingly, the analog multiplexor 686 may
be utilized to interface with client modules coupled to legacy-type
analog client devices.
[0251] The second transceiving module 690 enables the multimedia
server to communicate with at least some of the client modules via
a second communication path 692. The second communication path 692
may be a wire line connection, RF connection and/or infrared
connection. The data transmitted over the second communication path
may be identical to the stream of channel data transmitted by
transceiving module 154, 208, 246, 286 and/or 346, or separate
data. As such, the multimedia server 700 may service multiple sets
of client modules from the same grouping of audio and/or video
sources 674.
[0252] The control module 156, 244, 284 and/or 344 includes
processing means for determining client access privileges for each
of the plurality of clients. Such access privileges include
parental control features, time of access, quantity of access, et
cetera. As such, the control module determines for each client
selection request whether the request is valid before providing a
selection command to the tuning module. Such a feature gives the
operator of the multimedia communication system control over which
A/V resources 674 each client module may access, the amount of
access per day, and/or the time of access.
[0253] FIG. 24 illustrates a logic diagram of a method for
providing multimedia services to a local area network. The method
may be performed by any one of the multimedia servers illustrated
and described in the previous figures. Accordingly, the operational
steps illustrated in FIG. 24 may be performed by multimedia server
12, 42, 88, 102, 132 and/or 700.
[0254] The processing begins when a plurality of channels are
received from at least one multimedia source. The multimedia source
may be a satellite connection, cable connection, NTSC antenna
connection, PAL antenna connection, HDTV connection, SDTV
connection, radio connection, et cetera. In addition, the plurality
of channels may be from a plurality of single channel sources
including a DVD player, VCR, closed circuit television, laser disk
player, camcorder, digital audio storage device (e.g., MP3 player),
DVD audio player, CD player, et cetera. The plurality of channels
are continuously received but not processed until one or more
client modules select one or more channels.
[0255] The process proceeds to Step 712 where a select request is
received from at least one client module via a communication path.
The communication path as previously discussed in FIGS. 20-22 may
be a radio frequency communication path, IR communication path,
and/or wire line communication path. The selection request may be
from one client module or a plurality of client modules, each
client may be requesting access to a different channel, the same
channel or any combination thereof. The selection request includes
the identity of the particular client module and the identity of
the particular channel and/or source for the channel. As such, the
selection request includes sufficient information for the
multimedia server to determine the particular audio and/or video
source of the particular channel and the desired channel. For
example, the selection request may indicate that channel 5 of a
satellite broadcast is to be the channel of interest for a
particular client module.
[0256] The processing then proceeds to Step 714 where a control
module within the multimedia server generates a set of channel
select commands from the select request. Accordingly, for each
select request received from the client modules, the control
module, assuming the select request is valid, generates a
corresponding select command. Thus, if only one client module has
provided a select request, only one select command is generated. As
one of average skill in the art will appreciate, the select command
is not repeatedly generated from a select request, the select
command is typically generated once and maintained until an
alternate select request is received or a termination request is
received.
[0257] The processing of generating a set of channel select
commands may further be described with reference to Steps 722-724.
At Step 722, the select requests are de-formatted. As previously
mentioned, the select requests are received via a communication
path, which utilizes a particular data conveyance protocol. The
data may be encoded utilizing one of a variety of encoding schemes
such as Manchester encoding, non-return to zero encoding,
multi-level encoding, block encoding, NB/MB encoding, et cetera. In
addition, the encoded data is then modulated utilizing the
particular modulation scheme which may be TDM, FDM, ASK, PSK, et
cetera. Accordingly, to recapture the original selection requests,
the data must be demodulated and decoded.
[0258] The process then proceeds to Step 724 where the select
request is interpreted to produce the channel select command. The
interpretation of the select request includes an authentication
process, a verification of the particular client module, and a
determination of the validity of the client module. If the client
module is an authentic client module and the service being
requested is within the privileges of the particular client module,
the control module will generate the corresponding channel
command.
[0259] Returning to the main flow of FIG. 24, the process continues
at Step 716 where a tuning module selects a set of channels from
the plurality of channels based on the set of channel select
commands. For example, if only one channel select command exists,
the tuning module will select a channel corresponding to this
particular channel select command. If two channel select commands
are being provided to the tuning module, the tuning module selects
two channels, one for each selection command.
[0260] The process then proceeds to Step 718 where the set of
channels are mixed into a stream of channel data. The channel data
is mixed in such a way as to identify the particular source of the
channel data, the destination of the channel data, the select
request, and/or any other identifying information needed to ensure
that the appropriate client module receives the appropriate data.
As one of average skill in the art will appreciate, the stream of
channel data may be stored on a hard drive within the multimedia
server for subsequent retrieval and/or use. As such, the multimedia
server, via a hard drive and appropriate software, may perform a
digital VCR function or like function.
[0261] The process then proceeds to Step 720 where the stream of
channel data is transmitted via a communication path to the
plurality of client modules. As previously mentioned, the
communication path may be a wire line communication path, RF
communication path and/or infrared communication path. The
transmitting of the stream of channel data may be further defined
with reference to Step 726.
[0262] At Step 726, the stream of channel data is formatted for
transmission via a transceiving module of the multimedia server.
The formatting of the data includes encoding the data utilizing a
particular encoding scheme such as multi-level encoding, non-return
to zero encoding, Manchester encoding, block encoding, an nB/mB
encoding where n<m. For example, the nB/mB encoding may be 4B/5B
where 4 bits of original data is converted into 5 bits of encoded
data. In addition, depending on the particular data conveyance
protocol used within the communication system, the encoded data is
then modulated utilizing one or more modulation schemes including
TDM, FDM, ASK, PSK, PCM, QPSK, QAM, et cetera. The formatting of
the stream of data may additionally include converting the stream
of channel data into analog signals for conveyance in an analog
format to one or more of the client modules. The conversion to
analog signals may be done in parallel with the conveyance of the
formatted stream of channel data. As such, both digital and analog
signals representing the stream of channel data may be transmitted
to the client modules. Accordingly, the analog signals may be
transmitted over a different communication path than the digital
signals. In addition, multiple communication paths may be utilized
depending on the coupling between the client modules and the
multimedia servers as previously discussed with reference to FIGS.
20-22.
[0263] As one of average skill in the art will appreciate, a single
stream of data is provided from the multimedia server to the
plurality of client modules. The stream of channel data includes
the data corresponding to each selection made by the client
modules. Thus, each client module receives the entire stream of
channel data and extracts only the data relevant to service its
particular selection request.
[0264] FIG. 25 illustrates a logic diagram of a method that further
describes Step 720 of FIG. 24 when the communication path is a wire
line connection. The process begins at Step 730 where a
determination is made regarding the transmitting intervals and the
receiving intervals. The determination is made by the control
module within the multimedia server and is based on the traffic
loading, pre-defined allocation intervals, et cetera. In addition,
the transmitting intervals and receiving intervals are dependent
upon whether a single communication path is utilized to receive and
transmit data or whether separate transmit and receive paths are
available.
[0265] The process then proceeds to Steps 732 and 736. At Step 732
the stream of channel data is formatted based on the type of
transceiving. The type of transceiving corresponds to the
modulation scheme utilized, which may be TDM, FDM, ASK, PCM, PSK,
et cetera. The processing then proceeds to Step 734 where the
formatted channel data is provided to at least one of the plurality
of clients during a transmitting interval or multiple transmitting
intervals, via the wire line connection.
[0266] At Step 732, the multimedia server receives formatted select
request during receive intervals via the wire line connection. The
select requests are formatted based on the type of transceiving
used within the multimedia communication system. The type of
transceiving corresponds to the modulation scheme utilized, which
may be TDM, FDM, ASK, et cetera.
[0267] FIG. 26 illustrates a graphical representation of the
transmitting intervals and receiving intervals via the
communication path. As shown, communication path 746 operably
couples multimedia server 738 to a plurality of client modules
740-742. Note that multimedia server 738 may be any one of the
multimedia servers described in reference to FIGS. 1-11 and FIG.
23. The client module 740-744 may be any one of the client modules
discussed in reference to FIGS. 1-11. The communication path 746
may be a wire line connection, radio frequency connection, and/or
infrared communication path.
[0268] As shown, data conveyed over the communication path 746 may
be done in packets and/or frames. The transmission of packets
and/or frames is divided into transmit intervals 748, 752 and 756
and receive intervals 750 and 754. During the transmit intervals
748, 752 and 756, the multimedia server is transmitting the stream
of channel data to the plurality of client modules 740-744. During
the receive intervals 750 and 754, one or more of the client
modules 740-744 is transmitting a selection request to the
multimedia server.
[0269] The client module 740-744 access the receive intervals 750
and 754 based on any one of a plurality of schemes such as CSMA,
token ring passing, polling by the multimedia server 738, TDM
access, et cetera. Accordingly, the ratio between the transmit
intervals 748 and received intervals 750 may be set or may be
allocated as needed. For example, the receive interval 750 and 754
may occur once for every 10-20 transmit intervals 748, 752, 756.
Alternatively, the transmit intervals and receive intervals may be
allocated strictly based on a CSMA concept where the multimedia
server 738 and each of the client modules 740-744 monitor the
communication path for transmissions. If the path is available, the
particular entity transmits its data utilizing CSMA with collision
avoidance and/or CSMA with collision detection. As one of average
skill in the art will appreciate, there are numerous ways in which
data can be conveyed via the communication path 746 between
multimedia server 738 and the plurality of client modules 740-744
to ensure that the stream of channel data is received by the client
modules 740-744 and the client modules 740-744 have adequate access
to the communication path 746 to provide selection commands and/or
changes to such selections. As a further example, the multimedia
server 738 may broadcast within the stream of channel data, when
the communication path 746 will be available for transmitting
selection request by the client modules. In addition, the
broadcasting by the multimedia server 738 may include the identity
of which client module or client modules may access the
communication path at the allocated received time.
[0270] FIG. 27 illustrates a logic diagram of a method for further
processing of Step 720 of FIG. 24 when the communication path is a
radio frequency communication path. The processing begins at Step
760 where the multimedia server determines the transmitting
intervals and receiving intervals. This was described with
reference to FIG. 26. The process then proceeds to Steps 762 or
766. At Step 762, the stream of channel data is formatted based on
the type of transceiving. The process then proceeds to Step 764
where the formatted channel data is provided to at least one of the
clients during a transmitting interval via the radio frequency
communication path.
[0271] At Step 766, the multimedia server receives formatted select
request during receive intervals on the RF communication path. The
select requests are formatted based on the type of
transceiving.
[0272] FIG. 28 illustrates a logic diagram of a method that further
describes Step 720 of FIG. 24 when the communication path is an
infrared communication path. The processing begins at Step 770
where the transmitting intervals and receiving intervals are
determined. The process then proceeds to Steps 772 and 776. At Step
772, the stream of channel data is formatted based on the type of
transceiving. The process then proceeds to Step 774 where the
formatted channel data is provided to at least one client module
during transmitting intervals via the infrared communication
path.
[0273] At Step 776, the multimedia server receives formatted select
request during receive intervals on the infrared communication
path. The select requests are formatted based on the type of
transceiving utilized.
[0274] FIG. 29 illustrates a schematic block diagram of a tuning
module 825 that may be utilized as the tuning module 150, 240, 280,
and/or 340 as shown in FIGS. 12, 14-16. The tuning module 825
includes a plurality of selectors 780-786, an encoding module 804,
and a bus interface 806 that provides connectivity to a shared bus
824. The shared bus 824 is shared with the channel mixer processing
module and other components of the multimedia servers as shown in
FIGS. 12, 14-16. The selectors 780-786 may be the plurality of
tuners shown in FIG. 12, the multiplexors shown in FIG. 14, the
combination of multiplexors and tuners shown in FIG. 15 and/or the
HDTV tuners shown in FIG. 16. Accordingly, the selectors 780-786
are dependent on the particular source providing the plurality of
channel 787.
[0275] The encoding module 804 includes a plurality of buffers
808-814, an encoder 816, a buffer controller 818, and a packetizing
module 820. The buffers 808-814 may be physically separate memory
devices or logically separate memory devices. Each of the buffers
808-814 function as a ring buffer. The buffer controller 818
provides the management of each buffer 808-814 including head and
tail pointer tracking, and read and write control.
[0276] As shown, each of the plurality of selectors 780-786 is
operably coupled to receive a plurality of channels 787. Based on a
respective channel select command 796-802, each of the selectors
780-786 outputs an individual selected channel 788-794. The
plurality of channels 787 may be provided by the multimedia sources
previously described with reference to FIGS. 1-11. As one of
average skill in the art will appreciate, more or less selectors
780-786 may be included in tuning module 825. In addition, one or
more of the selectors 780-786 may be idle if a limited number of
client modules are accessing the multimedia server. Accordingly,
the encoding module 804 via the buffer controller 818 is aware of
which selectors 780-786 is actively providing selected channel data
788-794.
[0277] The buffer controller 818 coordinates the writing of the
data of the selected channel 788-794 into the respective buffers
808-814. In addition, the buffer controller 818 coordinates the
reading of the data from each of the buffers 808-814 into the
encoder 816. The encoder 816 may perform a particular encoding
function such as multi-level encoding, non-return to zero encoding,
Manchester encoding, block encoding, NB/MB encoding where N>M.
Typically, the encoder 816 is utilized to facilitate the accuracy
of data transmission from the tuning module 825 to the channel
mixer of the multimedia server. As one of average skill in the art
will appreciate, the encoder 816 may be omitted when the data of
the selected channels may be accurately transmitted to the channel
mixer.
[0278] The packetizing module 820 packetizes the encoded data to
produce a plurality of packets. Each packet includes a header
section and data section. The header section includes the identity
of the selected channel, the type of data of the selected channel
(e.g., audio, video, text, et cetera), identity of the particular
multimedia source, whether the encryption is enabled or disabled,
the type of encryption used, whether compression is enabled or
disabled, the type of compression used, and/or a packet sequence
number. The packets are provided to bus interface 806, which may
include a receiving module 826. The bus interface provides the
packets of encoded set of channels 822 to the shared bus 824.
[0279] In addition, the bus interface 806 via the receiving module
826 receives packet 828. The receiving module 826 processes the
packets to retrieve the channel select commands 830. The channel
select command 830 is comprised of the individual channel select
commands 796-802. The receiving module may include a decoder to
decode the data contained within the packets to recapture at least
a portion of a channel select command. The decoding performed would
be the inverse of the encoding used by the client module.
[0280] FIG. 30 illustrates a schematic block diagram of tuning
module 840 which may be used in any one of the multimedia servers
illustrated in FIGS. 12, 14-16. The tuning module 840 is very
similar to tuning module 825 of FIG. 29 with the difference that
the encoding module 804 includes a framing module 842 instead of a
packetizing module 820. In addition, the bus interface 806 includes
a monitoring module 844 as opposed to a receiving module 826.
[0281] In operation, the selectors 780-786 select a particular
channel 788-794 based on a channel select command 796-802 from a
plurality of channels 787. Buffers 808-814 store the data of the
selected channel 788-794. The encoder 816 encodes the data to
produce encoded channel data. The encoded channel data is received
by framing module 842, which frames the data of each of the
selected channels into frames that include a header section and
data section. The header section includes the identity of the
selected channel, the type of selected channel, the identity of the
multimedia source, indication as to whether encryption is enabled
or disabled, the type of encryption used, an indication as to
whether compression is enabled or disabled, the type of
compression, and/or a frame number.
[0282] The bus interface 806 receives the framed data and provides
it as encoded set of channels 802 on to the shared bus 824. In
addition, the bus interface 806 receives frames 846 from the shared
bus. The monitoring module 844 interprets the frames 846 at
specific time intervals to extract channel select commands 848.
[0283] FIG. 31 illustrates a schematic block diagram of another
embodiment of the tuning module 850. The tuning module 850 may be
utilized in any one of the multimedia servers illustrated in FIGS.
12, 14-16. The tuning module 850 includes a plurality of selectors
780-786, a data compression module 862, an encryption module 860,
the encoding module 804, the bus interface 806, the bus controller
870, a decoding module 852, a decrypting module 864, and a
decompressing module 868. The bus interface 806 is controlled via
the bus controller 870, which controls the receiving of the channel
select commands and further controls the transmitting of encoded
channel data.
[0284] In operation, the tuning module 850 receives select commands
from the shared bus 824 via the bus interface 806. The bus
interface 806 provides the received channel select commands to the
decoding module 852. The decoding module 852 includes a deframer or
depacketizer module 854, a decoder 856, and a buffer 858. The
deframer or depacketizer 854 extracts data from a received frame or
from a received packet. The deframed or depacketized data is
provided to the decoder 856. The decoder recaptures the original
data of the selection request by utilizing the inverse function of
the encoder within the client module. As such, if the client module
used Manchester encoding, the decoder would use the inverse
Manchester encoding function to recapture the data. The recaptured
data is then stored in buffer 858.
[0285] If the data is unencrypted and is not compressed, the
recaptured data is provided to control module 156, 244, 284, and/or
344. Based on the channel select request, the control module
generates a plurality of channel select commands 796-802. The
control module provides the channel select commands to the
plurality of selectors 780-786.
[0286] If, however, the selection request is encrypted and/or
compressed, the encrypted data would be provided to decryption
module 864. Decryption module 864 decrypts the data based on the
encryption/decryption scheme utilized. For example, if the client
module utilized a data encryption standard (DES) encryption
technique, the decryption module would use the corresponding
decryption scheme to recapture the data.
[0287] If the data is also compressed, the decrypted data or the
data from buffer 858 is provided to the decompressing module 868.
The decompressing module 868 utilizes the inverse function that was
used to compress the data. As such, the recaptured data, which has
either been decrypted and/or decompressed, is provided to the
control module, which produces the corresponding channel select
commands 796-802.
[0288] The selectors 786-780 output a selected channel 788-794
based on the respective channel select commands 796-802 from a
plurality of channels 787. The plurality of selected channels
788-794 may be provided to a data compression module 862, an
encryption module 860, and/or directly to the encoding module
804.
[0289] If the selected channels 788-794 are to be compressed, the
data compression module 862 utilizes a data compression scheme to
compress the data. The data compression scheme may be a zip-type
function or other known data compression techniques. If the
compressed data is to also be encrypted, it is provided to
encrypting module 860. Alternatively, if the compressed data is to
be processed without encryption, it would be provided directly to
encoding module 804.
[0290] If the data is to be encrypted, encrypting module 860
utilizes an encryption scheme to encrypt the data of the selected
channels 788-794. The encryption scheme utilized may be any one of
a variety of known encryption schemes such as DES, PGP (pretty good
protection), et cetera. The encrypted data 860 is then provided to
encoding module 804, which subsequently encodes the data and
provides the encoded data to bus interface 806 for transmission on
the shared bus 824. As previously mentioned, the encoder of the
encoding module 804 may be omitted such that the encrypted data may
be transmitted directly onto the shared bus without further
encoding.
[0291] FIG. 32 illustrates a schematic block diagram of an
alternate tuning module 880 that may be utilized in any one of the
multimedia servers illustrated in FIGS. 12, 14-16. The tuning
module 880 includes a processing module 882 and memory 884. The
processing module 882 may be a single processing device or a
plurality of processing devices. Such a processing device may be a
microprocessor, microcontroller, microcomputer, digital signal
processor, programmable gate array, central processing unit, state
machine, logic circuitry, and/or any device that manipulates
signals (analog and/or digital) based on operational instructions.
The memory 84 may be a single memory device or a plurality of
memory devices. Such a memory device may be a read-only memory
device, random access memory device, flash memory, magnetic tape
memory, system memory, erasable read-only memory, and/or any device
that stores digital information. Note that when the processing
module 882 implements one or more of its functions via a state
machine or logic circuitry, the memory storing the corresponding
operational instructions is embedded within the circuitry comprised
in the state machine or logic circuit. The operational instructions
stored in memory 884 and executed by processing module 882 have
generally been discussed with reference to the preceding figures
and is further illustrated with reference to FIGS. 33-37.
[0292] FIG. 33 illustrates a logic diagram of a method for
multiplexing a plurality of channels in a multimedia system via a
tuning module. The processing begins at Step 890 where a plurality
of channels is received from a multimedia source. The receiving of
the plurality of channels may further include one or more of:
receiving audio and video data for each of a plurality of channels
from a satellite connection; receiving audio and video data for
each of a plurality of channels from a set-top box; receiving audio
and video data for each of a plurality of channels from a cable
connection; receiving audio and video data for each of the
plurality of channels from a high definition television receiver;
receiving audio and video data for each of the plurality of
channels from an antenna connection which receives NTSC broadcasts,
PAL broadcasts, et cetera. Accordingly, the plurality of channels
may be from a single multimedia source or a plurality of multimedia
sources.
[0293] The process then proceeds to Step 892 where a plurality of
channel selection commands are received. The plurality of channel
selection commands are derived from select requests provided by a
plurality of client modules wherein each of the channel select
commands identifies a particular channel of the plurality of
channels. The processing then continues at Step 894 where a channel
of the plurality of channels is selected per channel selection
command. Note that the selected channel may be from any one of a
plurality of multimedia sources.
[0294] The process then proceeds to Step 896 where each of the
selected channels is encoded based on a data conveyance protocol of
the multimedia system. The encoding may be multi-level encoding,
non-return to zero encoding, Manchester encoding, block encoding,
and/or nB/mB encoding where n<m.
[0295] As one of average skill in the art will appreciate, high
definition television, satellite receivers, set-top boxes, et
cetera typically utilize MPEG video data. As such, in the typical 6
MHz bandwidth for NTSC channel separation, compressed video
includes multiple channels in the same frequency band. Thus, when a
particular channel is selected from one of these multimedia
sources, multiple compressed channels may be retrieved.
Accordingly, each of the compressed channels may be encoded as
described in Step 896. As one of average skill in the art will
further appreciate, prior to the encoding of Step 896, the data may
be compressed via a compression technique and/or encrypted
utilizing an encryption technique.
[0296] The process then proceeds to Step 898 where the encoded
channel data is conveyed to the channel mixer. The conveying of the
encoded data may be done by framing the data from each of the
selected channels into frames that include a header section and a
data section. Alternatively, the encoded channel data may be
packetized into packets that include a header section and a data
section. The header section of either a packet or frame includes
the identity of the selected channel, type of data of the selected
channel, the identity of the multimedia source, whether encryption
is enabled or disabled, the type of encryption used, an indication
as to whether compression is enabled or disabled, the type of
compression, and/or a packet or frame number.
[0297] FIG. 34 illustrates a logic diagram of a method that further
defines the receiving of the channel select commands as described
generally in Step 892 of FIG. 33. The processing begins at Step 900
where the channel select requests are received from a plurality of
client modules. The process then proceeds to Step 902 where the
channel select requests are processed to produce the plurality of
channel select commands. Each of the channel select commands
include a specific channel select command, less channel selection
command, next channel selection command, previous channel selection
command, favorite channel selection command, and/or select channel
from a user defined list. Such a command corresponds to the
particular request by the client and/or a default processing scheme
used within the multimedia server. Accordingly, when a particular
client makes a request, the tuning module will interpret the
request in light of one of these particular multimedia channel
selection schemes.
[0298] The processing of the plurality of selection requests may be
done in one or more of Steps 904-908. At Step 904, the channel
select request is interpreted to identify at least one of the
clients. In addition, the request is interpreted to determine the
particular channel selection request being made. Based on this
information, the channel command may be generated.
[0299] At Step 906, the client initiating the selection request is
authenticated. The authentication determines whether the client is
a valid client of the multimedia server. At Step 908, the specific
channel selection request made by a client is authenticated. This
may be done by determining whether the client has access privileges
for the particular channel being requested, whether the request is
being made within an approved time of the day, and/or whether a
time allotment of accessing multimedia sources has been exceeded.
In addition, the authentication of the specific channel request may
include determining whether the client is authorized to purchase
the requested channel from one of the multimedia sources (e.g.,
whether the client is authorized to access pay preview channels),
and/or whether the client has exceeded in the count limit
established by the multimedia server.
[0300] FIG. 35 illustrates a logic diagram of a method for
receiving the channel selection commands of Step 892 of FIG. 33.
The process may begin at Step 910, 916 and/or at Step 922. At Step
910, the tuning module monitors packets on a shared bus. The
packets, as previously described, include a header section and data
section. The process then proceeds to Step 912 where the tuning
module identifies at least one of the packets as containing at
least a portion of one of the plurality of channel selection
commands.
[0301] The process then proceeds to Step 914 where the tuning
module decodes the at least one packet based on the data convention
protocol of the multimedia system to recapture at least a portion
of one of the plurality of channel select commands. Such decoding
includes interpreting the header section, extracting the data from
the data section, and determining whether the extracted data
contains all of the data of a channel select command or partial
data of a channel select command. If the data extracted is a
partial select request, it is buffered until all of the data
related to the channel select command is received.
[0302] At Step 916, the tuning module monitors a shared bus at
specific time intervals for frames of relevant data. The process
then proceeds to Step 918 where the tuning module identifies a data
frame at one or the specific time intervals to contain at least a
portion of one of the plurality of channel select commands. The
process then proceeds to Step 920 where the tuning module decodes
the data frame based on the data convention protocol to recapture
at least a portion of one of the channel select commands. The
decoding includes interpreting the header section, extracting the
data from the data section, and determining whether the data
contains a full channel selection command or a partial one. If
partial, the data is buffered until a full channel select command
has been received.
[0303] At Step 922, the tuning module decrypts each of the
plurality of channel select commands. In addition, at Step 924, the
tuning module decompresses each of the channel select commands.
[0304] FIG. 36 illustrates a logic diagram of an alternate method
for multiplexing a plurality of channels in a multimedia system by
a tuning module. The processing begins at Step 930 where a channel
from a plurality of multimedia sources is received to produce a
plurality of channels. The multimedia sources may be a DVD player,
CD player, camcorder, VCR, DVD audio player, et cetera. The process
then proceeds to Step 932 where the tuning module receives a
plurality of channel select commands. The process then proceeds to
Step 934 where the tuning module selects a channel from the
plurality of channels for each of the channel select commands
received.
[0305] The process then proceeds to Step 936 where the tuning
module encodes each of the selected channels based on a data
convention protocol of the multimedia system. The encoding includes
multi-level encoding, non-return to zero encoding, Manchester
encoding, block encoding, and/or nB/mB encoding where n<m. Note
that prior to encoding, the data of each selected channel may be
compressed and/or encrypted. The process then proceeds to Step 938
where the encoded channel data is conveyed to the channel mixer.
The data may be conveyed as packets utilizing CSMA, CSMA with
collision avoidance and/or CSMA with collision detection.
Alternatively, the data may be conveyed as frames, which will be
transmitted in specific time slots for time division multiplexing
and/or frequency positions for frequency division multiplexing.
[0306] FIG. 37 illustrates a logic diagram of further processing of
Step 932 of FIG. 36. At Step 940, the tuning module receives the
channel select request from a plurality of client modules. The
process then proceeds to Step 942 where the tuning module, and/or
control module, processes the plurality of channel selection
requests to produce the plurality of channel selection commands.
The processing of the channel select request may be done as
described in Steps 944, 946, and/or 948.
[0307] At Step 944, the control module interprets a channel select
request to identify the particular client and the particular
request being made. If both are valid, the channel selection
command is generated.
[0308] At Step 946, the control module authenticates the client
that provided the specific channel selection request. The
authentication of the client verifies that the client is an
authorized user of the multimedia system.
[0309] At Step 948, the control module authenticates the specific
channel selection request. The authentication of the channel
selection request includes determining parental control limits,
subscription verification, account limits, time of day of the
request, and/or amount of multimedia service accessing over a given
duration.
[0310] FIG. 38 illustrates a schematic block diagram of a channel
mixer 950. The channel mixer 950 may be utilized in any one of the
multimedia servers described in FIGS. 1-15. The channel mixer 950
includes a stream parsing module 951, memory controller 952, memory
956 and a data transcoding module 954.
[0311] The stream parsing module 951 is operably coupled to receive
the encoded channel data 958 from the tuning module. The stream
parsing module 951 decodes the encoded channel data 958 to
recapture the original data. The stream parsing module 951 then
converts the data of each of the selected channels into generic
data 960. The stream parsing module 951 stores the generic data 960
in memory 956 via the memory controller 952.
[0312] The stream parsing module 951 conveys control information
964 and data 966 with the transcoding module 954. The control
information includes the channel select request 968. As such, based
on the control information, which includes the channel selection
request, the stream parsing module 951 processes the encoded
channel data 958 to produce the generic data 960.
[0313] The data transcoding module 954 retrieves the generic data
960 from memory 956 via the memory controller 952. The data
transcoding module 954 converts the generic data 960 into a stream
of data 962. The conversion of the generic data 960 is dependent
upon the particular type of data. For example, video data may be
stored as digital RGB data, digital YCRCB data, digitized video, et
cetera. The transcoding module retrieves the generic video data and
converts it into a specific formatted video data, such as MPEG 2,
and provides that as the stream of data 962.
[0314] If the data is audio data, the audio data is stored as
generic PCM audio data in memory 956. The data transcoding module
954 converts the generic PCM digitized audio data into MP3 data,
MPEG audio data, et cetera. If the encoded channel data 958
includes network data, the stream parsing module 951 passes the
network data to be stored in memory 956. The data transcoding
module retrieves the network data and passes it as the stream of
data 962.
[0315] FIG. 39 illustrates a channel mixer 980 operably coupled to
components of a device hosting the multimedia server. The channel
mixer 980 may be any of the channel mixers used in the multimedia
servers previously described. The host device includes a system bus
976, a host processor 970, a memory bridge 972 and system memory
974. The host device may be a personal computer, laptop computer,
satellite receiver, set top box, home theater receiver, radio
receiver, VCR, DVD, etc.
[0316] The channel mixer 980 includes a plurality of stream parsing
modules 951, memory controller 952, and the data transcoding module
954. The plurality of stream parsing modules 951 is operably
coupled to the tuning module 984. The tuning module 984 provides
the encoded channel data 958 to the channel mixer 980. In this
embodiment, each of the stream parsing modules 951 may be
processing a particular channel selection request for a particular
client module.
[0317] Each of the stream parsing modules 951 provides generic data
960 to memory 956 via the memory controller 952. The transcoding
module 954 converts the generic data 960 into the stream of data
962 and provides it to the transceiving module 982 via the system
bus 976.
[0318] The transceiving module 982 includes an encoder and
modulator for preparing the stream of data 962 for transmission to
the client modules. In addition, the transcoding module 982
includes a demodulator and decoder for receiving the channel select
commands from the plurality of client modules.
[0319] The transceiving module 982 provides the channel select
commands to the channel mixer 980 via the system bus interface 977.
As coupled, the host processor 970 may perform system operational
functions for the multimedia server via algorithms stored in the
system memory 970. Such system level functions may be allocation of
system multimedia resources, managing Internet access,
client-to-client communications, telephone communications, et
cetera. As such, system level functions will be described in
greater detail with reference to FIGS. 57-65.
[0320] FIG. 40 illustrates a schematic block diagram of another
channel mixer 1000 that may be utilized in any one of the
previously discussed multimedia servers. The channel mixer 1000
includes the stream parsing module 951 and may further include
multiple stream parsing modules 951, a digital to analog converter
1006, a decode instruction packet module 998, IDCT module 1027,
motion compensation 1023, and the transcoding module 954. The
transcoding module 954, for video signals, includes a MPEG decoding
module 1004 and an MPEG encoding module 1002. For audio signals,
the transcoding module 954 would include a PCM decoding module and
a PCM encoding module.
[0321] The MPEG encoding module 1002 includes a buffered motion
predictor 1018, a discrete cosigned transform module 1020, a
quantizer 1022, zigzag module 1021, a Huffman encoder 1024 and an
output bit bucket 1026. The MPEG decoding module 1004 includes a
dezigzag and dequantizer module 1010, an inverse discrete cosign
transform module 1012, a macro-block buffer 1014 and a motion
compensation and scaling module 1016. The functionality of motion
compensation and scaling module 1016 and the buffered motion
predictor 1018 are further described in co-pending patent
applications entitled, ADAPTIVE BANDWIDTH FOOTPRINT MATCHING FOR
MULTIPLE COMPRESSED VIDEO STREAMS IN A FIXED BANDWIDTH NETWORK and
DEVICE AND METHOD FOR COMPRESSION OF A VIDEO STREAM having a docket
number VIX5001 and VIX5002. The remaining elements of the MPEG
decoding module 1004 and MPEG encoding module 1002 are known, thus
no further discussion will be provided except to further illustrate
the concepts of the present invention.
[0322] Each of the stream parsing modules 951 includes a processor
992, an input bit bucket 996, memory controller 952, memory 956, a
plurality of bit stream modules 990, a direct memory access
interface 1028 and a Huffman decoder 1008. Each of the bit stream
modules 990 includes an interpreter 994. In operation, each of the
bit stream modules 990 is operably coupled to process one channel
of interest of the encoded channel data 958. The interpreter 994 is
utilized to identify which of the channels the particular bit
stream module is to process. The bit stream module then filters the
channel of interest such that all others are removed. The output of
each of the bit stream modules 990 is stored in memory 956 via
memory controller 952.
[0323] The processor 992 retrieves the data of each channel of
interest from memory 956 and converts it into generic data 960. The
processor 992 causes the generic data 960 to be stored in memory
956 via the memory controller. The processing 992 may utilize the
input bit bucket 996 to retrieve bytes of data from the memory 956
in a bit stream fashion. As such, the input bit bucket 996 performs
the function of converting bytes of data, which are stored in
memory, into bits of data, which are processed by processor 996.
The input bit bucket 996 may be utilized to retrieve any type of
data from memory 956 by processor 992.
[0324] The MPEG encoding module 1002 retrieves the generic data 960
under the control of the decoder instruction packet module 998. The
buffered motion predictor 1018 receives the generic data 960 and
produces therefrom motion compensated data. The motion compensated
data is provided to the DCT module 1020, which performs a discrete
cosine transform upon the data to produce DCT data. The quantizer
and zigzag module 1022 receives the DCT data and quantizes it and
zigzags it before providing the processed data to a Huffman encoder
1024. The Huffman encoder encodes the data to produce the specific
formatted data, which is provided back to memory 956 via the output
bit bucket 1026 via memory controller 952. The output bit bucket
1026 converts the bits received from the Huffman encoder 1024 and
provides it as bytes of data to memory controller 952.
[0325] The memory controller 952 retrieves the MPEG encoded data
from memory 956 and provides it as a stream of data 962 via the DMA
interface 1028 to the system bus 976. The transceiving module
retrieves the stream of data 962 from the system bus and processes
it as previously discussed.
[0326] The MPEG decoder module 1004 may be utilized to decode
incoming MPEG data to produce the generic data 960 and/or to decode
MPEG encoded data received from client modules. The MPEG decoding
module 1004, under the instruction of the decode instruction packet
module 998 receives MPEG encoded data and dezigzags and dequantizes
it via the dezigzag and dequantizer module 1010. The dezigzag and
dequantized data is provided to the IDCT module 1012 which performs
an inverse discrete cosine transform function upon the data. The
resulting data is then either provided to macroblock buffer 1014 or
provided to memory 956 via memory controller 952. The motion
compensation and scaler module 1016, under the control of the
decoder instruction packet module 998, retrieves data either from
the macroblock buffer 1014 or from memory 956 to perform a motion
compensation and scaling function thereon. The resulting data is
then either provided back to memory 956 or to the MPEG encoding
module 1002.
[0327] The digital to analog converter 1006 is operably coupled to
receive the stream of data 962 and convert it into analog signals
1030. The analog signals 1030 may be provided to legacy-type client
devices that still transceive data in an analog format.
[0328] FIG. 41 illustrates a schematic block diagram of another
channel mixer 1040, which may be utilized in any one of the
previously described multimedia servers. The channel mixer 1040
includes a processing module 1042 and memory 1044. The processing
module 1042 may be a single processing device or a plurality of
processing devices. Such a processing device may be a
microprocessor, microcontroller, microcomputer, central processing
unit, digital signal processor, programmable gate array, logic
circuitry, state machine and/or any device that manipulates signals
(analog or digital) based on operational instructions. The memory
1044 may be a single memory device or a plurality of memory
devices. Such a memory device may be a read-only memory, random
access memory, system memory, flash memory, magnetic tape memory,
hard drive memory, and/or any device that stores digital
information. Note that when the processing module 1042 performs one
or more of its functions via a state machine or logic circuitry,
the memory storing the corresponding operational instructions is
embedded within the circuitry comprising the state machine or logic
circuitry. The channel mixer 1040 performs the functions as
generally described in the preceding figures and further performs
the functions described in FIGS. 42-49.
[0329] FIG. 42 illustrates a logic diagram of a method for mixing
channels within a multimedia system. The process begins at Step
1050 where a set of channels is received as encoded channel data.
The process then proceeds to Step 1051 where the channel mixer
interprets the encoded channel data to identify a channel of
interest for each specific channel selection request it is
processing. For example, the set of channels may be received as
packets containing the encoded channel data from a tuning module.
Each packet includes a header section and a payload section. The
encoded channel data may be interpreted by reviewing the header
section to identify the particular channel of interest. The channel
of interest may be identified based on the identity of a source of
the channel data, the identity of the client requesting it, and/or
the multimedia resources processing the channel request.
[0330] If the channel of interest is included within a group of
compressed video channels, as would be the case for MPEG 2 encoded
video data, the channel of interest is retrieved from one of the
group of compressed video channels based on header information
contained within the packets transporting the encoded channel data.
Having identified the particular channel of interest, it is
isolated from the group of compressed video channels.
[0331] The interpretation of Step 1051 may further be described
with reference to Step 1056-1060. At Step 1056, the channel mixer
interprets the encoded channel data to identify a series of
channels of interest from the set of channels based on a
corresponding series of channel selection request. In other words,
the channel mixer is identifying each channel of interest for each
channel selection request being processed. The process then
proceeds to Step 1058 where the channel mixer processes data each
of the series of channels of interest based on the type of channel
to produce a series of generic data. The type of channel may be
audio data, video data, text data, and/or a combination thereof.
The processing then proceeds to Step 1060 where the series of
generic data is converted into a stream of data.
[0332] Returning to the main flow of FIG. 42 with processing of a
single channel selection request, the process continues at Step
1052 where the channel mixer processes data of the channel of
interest based on the type of channel to produce generic data. The
processing may include decoding the data, filtering the data to
isolate the particular channel of interest and then converting the
data to the generic data based on the type of data. For example,
when the type of data is multi-channel compress video, the
processing includes filtering the multi-channel compress video to
produce the channel of interest. The channel of interest is then
converted to generic data, which will be described in greater
detail with reference to FIGS. 43 and 44.
[0333] Continuing with the examples of the type of data, when the
type of data is single channel compress video, the processing
includes passing the single channel compress video as the channel
of interest. When the type of data is multi-channel digitized video
data, the multi-channel digital video data is filtered to produce
the channel of interest; when the type of data is single channel
digitized video data, it is passed as the channel of interest; when
the type of data is multi-channel digital audio, it is filtered to
produce the channel of interest; when the type of data is single
channel digital audio, it is passed as the channel of interest;
and, when the type of data is network carrier data, it is passed as
the channel of interest. As such, the channel of interest is then
converted to the generic data. The process then proceeds to Step
1054 where the generic data is converted into a stream of data.
[0334] FIG. 43 illustrates a logic diagram of a method that further
describes the processing of the data of the channel of interest as
generally described in Step 1052 of FIG. 42. The processing may be
done in any one or more of Steps 1070-1082. At Step 1070, the
channel mixer converts video data of the channel of interest into
generic video data when the type of data is multi-channel
compressed video. Typically, multi-channel compress video will be
received via a satellite connection where the data is MPEG, or
other MPEG standardized encoding.
[0335] At Step 1072, the channel mixer converts video data of the
channel of interest into generic video data when the type of data
is single channel compress video. Single channel compress video may
be from a DVD player or other source that produces a single channel
of MPEG 2, or other MPEG standard, encoded video data.
[0336] At Step 1074, the channel mixer converts video data of the
channel of interest into generic data when the type of data is
multi-channel digitized video data. The multi-channel digitized
video data may be received from a plurality of NTSC television
tuners, et cetera.
[0337] At Step 1076, the channel mixer converts video data of the
channel of interest into generic video data when the type of data
is single channel digitized video data. The single channel
digitized video data may be received as the output of a VCR, output
of a DVD player to a standard antenna or cable connection of a
television set, an NTSC television tuner, et cetera.
[0338] At Step 1078, the channel mixer converts audio data of the
channel of interest into generic audio data when the type of audio
data is multi-channel digital audio. Multi-channel digital audio
signals may be received from a satellite broadcast, or from
multiple digital audio sources, such as a CD player, DVD audio
player, et cetera.
[0339] At Step 1080, the channel mixer converts audio data of the
channel of interest into generic audio data when the type of audio
data is single channel digital audio. The single channel digital
audio may be received from a CD player, MP3 player, system memory
that is storing digitized audio, DVD audio player, et cetera.
[0340] At Step 1082, the channel mixer passes network data as the
channel of interest when the data being processed is network data.
Network data corresponds to one or more client modules accessing
the Internet, participating in a telephone conversation via the
PSTN, and/or client-to-client communication.
[0341] FIG. 44 illustrates a logic diagram that further defines the
processing of the data of Step 1052 of FIG. 42 when the data is
being converted into generic video data. This may be done in one or
more of Steps 1084-1092.
[0342] At Step 1084, the channel mixer converts the video data of
the channel of interest into MPEG formatted video data. The video
data may be the multiple compress video, the single channel
compress video, the multi-channel digitized video data, and/or the
single channel digitized video data.
[0343] At Step 1086, the channel mixer converts the video data of
the channel of interest into JPEG formatted video data. At Step
1088, the channel mixer converts the video data of the channel of
interest into M-JPEG formatted video data.
[0344] At Step 1090, the channel mixer converts the video data of
the channel of interest into digital RGB video data. The digital
RGB data may be stored in the associated memory device of the
multimedia server, stored in the host system memory, et cetera.
[0345] At Step 1092, the channel mixer converts the video data of
the channel of interest into digital YCBCR video data. The digital
YCBCR video data may be stored in the multimedia server memory, the
host system memory associated with the multimedia server, et
cetera.
[0346] As one of average skill in the art will appreciate, the
incoming video data from a plurality of multimedia sources may be
in a variety of video formats including digitized audio MPEG 1,
MPEG 2, et cetera, analog format, et cetera. The various formatted
video data is converted by the channel mixer into a generic video
format, which may be MPEG, JPEG, M-JPEG, digital RGB video data,
digital YCBCR video data, and/or any other conventional technique
for storing video information in a digital format.
[0347] FIG. 45 illustrates a logic diagram of a method that further
defines the processing of Step 1052 of FIG. 42 when audio data is
being converted into generic audio data. The processing may be done
by implementing one or more of Steps 1100-1104.
[0348] At Step 1100, the channel mixer converts the audio data of
the channel of interest into MPEG formatted audio data. At Step
1102, the channel mixer converts the audio data of the channel of
interest into MP3 formatted audio data. At Step 1104, the channel
mixer converts the audio data of the channel of interest into PCM
digitized audio data.
[0349] As one of average skill in the art will appreciate, the
multimedia server may receive a plurality of audio signals having
various audio data formats. The channel mixer converts the various
audio formats into a single audio format such as MPEG audio, MP3
audio, and/or PCM digitized audio. As one of average skill in the
art will further appreciate, by converting video data and audio
data into generic data formats, the multimedia server more readily
processes it. The processing of the generic data has been generally
described to convert the generic data into a specific formatted
data (e.g., MPEG 2 video and audio), before transmission to the
plurality of clients.
[0350] FIG. 46 illustrates a logic diagram of a method that further
describes the converting of the generic data into a stream of data
of Step 1054 of FIG. 42. The processing begins at Step 1110 where
the channel mixer determines the type of data of the channel of
interest. The processing then proceeds to Step 1112 where the
channel mixer converts the generic data into the stream of data
based on the type of data. The conversion processing at Step 1112
may be further described in one or more of Steps 1114-1126.
[0351] At Step 1114, the channel mixer converts the generic video
data of the channel of interest into specific video data when the
original data was multi-channel compressed video. The specific
video data may be in accordance with the MPEG 2 standard, MPEG 1
standard, and/or any of the other MPEG standards, or other
standardized process for conveying digitized video.
[0352] At Step 1116, the channel mixer converts the generic video
data of the channel of interest into the specific video data when
the original video data was a single channel compressed video
signal. At Step 1118, the channel mixer converts the generic video
data of the channel of interest into the specific video data when
the original video data was multi-channel digitized video data. At
Step 1120, the channel mixer converts the generic video data of the
channel of interest into the specific video data when the original
video data was a single channel digitized video signal.
[0353] At Step 1122, the channel mixer converts the generic audio
data of the channel of interest into specific audio data when the
original audio data was multi-channel digital audio. At Step 1124,
the channel mixer converts the generic audio data of the channel of
interest into specific audio data when the type of data is single
channel digital audio. Note that the specific audio data may be in
accordance with the MPEG 2 format, MP3 format, PCM encoded audio,
et cetera.
[0354] At Step 1126, the channel mixer passes network data of the
channel of interest without conversion to a specific format.
Accordingly, the network data is passed via the channel mixer
without conversion to a specific format, however, it is mixed with
the other channels of interest to produce the stream of channel
data.
[0355] FIG. 47 illustrates a logic diagram of a method for
converting the generic video data of the channel of interest into
an MPEG 2 specific video data format. The processing begins at Step
1130 where the channel mixer performs a motion prediction on the
generic video data to produce motion prediction data. The process
then proceeds to Step 1132 where the channel mixer performs a
discrete cosine transform on the motion prediction data to produce
DCT data. The process then proceeds to Step 1134 where the channel
mixer quantizes the DCT data to produce quantized data. The process
then proceeds to Step 1136 where the channel mixer zigzags
processes the quantized data to produce ZZ data. The process then
proceeds to Step 1138 where the channel mixer Huffman encodes the
ZZ data to produce the MPEG 2 specific video formatted data. As one
of average skill in the art will appreciate, Steps 1130-1138 are
known in the art, thus no further discussion will be presented
except to further illustrate the concepts of the present
invention.
[0356] FIG. 48 illustrates a logic diagram that further defines the
processing of Step 1052 of FIG. 42. The processing begins at Step
1140 where the channel mixer receives a control signal that
indicates multiple channel processing, when the channel of interest
is a compressed video signal and one of many compressed video
channels. The process then proceeds to Step 1142 where the channel
mixer decompresses the multiple compressed video channels to
produce multiple channels. The process then proceeds to Step 1144
where the channel mixer processes data of the multiple channels
based on the type of channel to produce multiple generic data. The
process then proceeds to Step 1146 where the channel mixer converts
the multiple generic data into the stream of data.
[0357] As one of average skill in the art will appreciate, MPEG
encoded video received via a satellite connection, or other type
connection, typically includes multiple channels within a typical 6
Mhz band. As such, multiple channels are received within the
typical single channel band. As such, the video for the channels in
the single channel band are decompressed to retrieve the actual
video data. From there, the channel of interest may be extracted
and processed accordingly, or all of the channels within the band
may be processed into the stream of data.
[0358] As one of average skill in the art will further appreciate,
the stream of data is essentially a multiplexing of the specific
formatted video data for each of the channel of interest. As such,
when two channels of interest are being conveyed to the plurality
of client modules, each channel comprises approximately 50% of the
stream of data. Accordingly, as the number of channels of interest
is being processed, the corresponding percentage of the stream of
data decreases but decreases proportionally.
[0359] FIG. 49 illustrates an alternate logic diagram of a method
for channel mixing of signals within a multimedia communication
system. The process begins at Step 1150 where a channel mixer
receives a set of channels as encoded channel data. The process
then proceeds to Step 1152 where the channel mixer interprets the
encoded channel data to identify the type of data of a particular
channel of interest contained within the set of channels. The
interpretation is based on a specific channel selection request
received via one of the plurality of clients. The encoded channel
data may be received in packets and/or frames where the packets and
frames each include a header section that provides identifying
information such that the channel mixer may appropriately identify
the particular channel of interest. In addition, the interpretation
of the encoded channel data may further include determining the
filtering requirements to extract the channel of interest from a
plurality of channels.
[0360] The processing proceeds to Step 1154 where the channel mixer
separates the channels of interest from the set of channels based
on the type of data. The process then proceeds to Step 1156 where
the channel mixer processes the data of the channels of interest
based on the type of data to produce generic data. Such processing
was previously described with reference to FIGS. 43-46. The process
then proceeds to Step 1158 where the channel mixer converts the
generic data into a stream of data. This was previously described
with reference to FIGS. 46 and 47.
[0361] FIG. 50 illustrates a schematic block diagram of a client
module 1160 operably coupled to a client device. The client module
1160 may be any of the client modules illustrated in FIGS. 1-11.
The client module 1100 includes a video decoder 1162 and/or
rendering module 1164, embedded dynamic random access memory (DRAM)
1168, and a network interface controller 1166. The client device
includes a client system bus 1172, a client processor 1174, memory
bridge 1176 and client system memory 1178. The client device may be
a laptop computer, personal computer, personal digital assistant,
CRT monitor, flat panel monitor, television set, high definition
television set, a SDTV, a home theatre system, and/or any device
that has a audio and/or video display associated with it.
[0362] The client module 1160 is operably coupled to the client
system bus 1172 via a system bus interface 1170. The system bus
interface 1170 may couple the client module 1180 to external serial
and/or parallel ports of the client device and/or internal
interfaces within the client device. Such external interfaces
include universal serial bus (USB), serial port, IR port, parallel
port, et cetera. Internal connections include PCI bus, AC 97
interface, and/or any interface that allows a peripheral component
to interface with the memory bridge of a host device.
[0363] The network interface controller 1166 is operably coupled to
the multimedia server, which may be any one of the multimedia
servers shown in FIGS. 1-11. The network interface controller 1166
receives packets and/or frames from the multimedia server and
extract data 1186 for a channel of interest 1184. In essence, the
network interface controller 1166 monitors the packets on the
communication path with the multimedia server to identify packets
that are addressing the client module 1160. When such packets
and/or frames are identified, the network interface controller
extracts the data 1186 from the frames and/or packets and provides
the data to the video decoder 1162 and/or the rendering module
1166.
[0364] The video decoder 1162 decodes the data 1186 to produce
display data. The display data may be stored in the embedded memory
1168. The rendering module 1164 retrieves the display data from the
embedded memory 1168 and provides it as rendered video images 1188
to the client device. As such, the rendering module 1164 prepares
the data for display by a display of the client device.
[0365] FIG. 51 illustrates a more detailed schematic block diagram
of a client module 1175 which may be used to implement any one of
the client modules illustrated in FIGS. 1-11. The client module
1175 includes the rendering module 1164, a memory controller 1216,
the memory device 1168, an internal bus 1201, the video decoder
1162, the network interface controller 1166, a request module 1212,
a video processor 1198, a video camera 1196, at least one speaker
1214, a microphone 1194, and an audio processor 1192. The video
decoder 1162 includes a Huffman decoder 1202, a dezigzag and
dequantizer module 1204, an inverse discrete cosine transform
module 1206, a macroblock buffer 1208, and a motion compensation
and scaler 1210. The function of the video decoder 1162 is known,
thus no further discussion of the video decoder or its components
will be provided except to further illustrate the concepts of the
present invention.
[0366] The network interface controller 1166 includes a
transmitting module 1190 and the receiving module 1200. The
receiving module 1200 receives encoded channel data 1180, which may
be in packet form, or in frames. The receiving module interprets
the packets and/or frames to extract data 1186 for the particular
channel of interest 1184. The extracted data is placed on bus 1201
for storage and RAM 1168. The data 1186 is subsequently retrieved
from memory 1168 by the video decoder 1162 to produce decoded video
data. The decoded video data is stored once again in the memory
1168. The rendering module 1164 subsequently retrieves the decoded
video data from memory 1168 and processes it to produce rendered
video images 1188. The rendered video images 1188 are then provided
onto the client system bus 1172 for subsequent display. Note that
the client device includes a display, which includes a video
display and/or audio display.
[0367] If the encoded channel data 1180 includes frames and/or
packets of audio data for the client module 1175, the receiving
module 1200 provides the audio data to audio processor 1192, which
prefers the audio data for display. The prepared audio data may be
stored in 1168 for subsequent playback or provided to the client
system bus 1172.
[0368] In addition, the audio processor 1192 may receive audio
signals via microphone 1194. The audio processor 1192 processes the
audio signals from microphone 1194 and either provides them to the
client system bus 1172 or to the memory 1168. If the audio data
from microphone 1194 is to be transmitted to the multimedia server,
the transmitting module 1190 subsequently retrieves the audio data
from 1168 and provides it to the multimedia server.
[0369] The request module 1212 receives the selection request from
the client device. As previously discussed, the selection request
identifies the particular channel of interest that the client
desires to access from the multimedia server. The transmitting
module 1190 prepares the selection request for transmission to the
multimedia server via the communication path. The transmitting
module 1190 utilizes an encoding and/or modulation scheme in
accordance with the data conveyance protocol of the multimedia
communication system.
[0370] The client module 1175 may also include interfacing for
receiving video signals from a video camera 1196 via video
processor 1198. The video processor 1198 processes video signals
from the video camera 1196 and either provides them to the client
system bus 1172 or stores them in RAM 1168. If the stored video
signals are to be provided to the multimedia server, the
transmitting module 1190 retrieves the video data from RAM 1168 and
prepares them for transmission. The preparation of video data for
transmission is in accordance with the data conveyance protocol
used within the multimedia communication system. As one of average
skill in the art will appreciate, the memory controller 1216
controls the reading and writing of data to and from RAM 1168. As
one of average skill in the art will also appreciate, the client
module 1175 may have interfaces for connecting to an audio
processor 1192 and/or video processor 1198, where such devices may
be included in the client device.
[0371] FIG. 52 illustrates a schematic block diagram of a client
module 1220, which may be used to implement any one of the client
modules illustrated in FIGS. 1-11. The client module 1220 includes
a processing module 1222 and memory 1224. The processing module
1222 may be similar to the processing module 364 used in the client
module of FIG. 11 and memory 1224 may be similar to memory 366 used
in the client module of FIG. 11. The processing module 1222 may be
a single processing device or a plurality of processing devices.
Such a processing device may be a microcontroller, microcomputer,
microprocessor, digital signal processor, central processing unit,
programmable gate array, state machine, logic circuitry, and/or any
device that manipulates signals (analog or digital) based on
operational instructions. The memory 1224 may be a single memory
device or a plurality of memory devices. Such a memory device may
be a read-only memory, random access memory, system memory, floppy
disk memory, hard drive memory, magnetic tape memory, flash memory,
and/or any device that stores digital information. Note that when
the processing module 1222 implements one or more of its functions
via a state machine or logic circuitry, the memory storing the
corresponding operational instructions is embedded within the
circuitry comprising the state machine and/or logic circuit. The
operational instructions performed by processing module 1222 and
stored in memory 1224 are illustrated as logic diagrams as shown in
FIGS. 53-56.
[0372] FIG. 53 illustrates a logic diagram of a method for
processing data within a client module. The processing begins at
Step 1240 where the client module transmits a channel selection
request that identifies a channel of interest. The channel
selection request is provided to a multimedia server which,
subsequently responds by providing a stream of channel data that
wherein at least a portion of the stream of data includes data
corresponding to the channel of interest.
[0373] The process continues at Step 1230 where the client module
receives the set of channels as a stream of data from a multimedia
server. The receiving may further include decoding the stream of
data to recapture data of the channel of interest (i.e., the
channel corresponding to the one requested by the client module's
client). The decoding may include one or more of multi-level
decoding, non-return to zero decoding, Manchester decoding, block
decoding, and/or nB/mB decoding where n<m.
[0374] The process then proceeds to Step 1232 where the client
module interprets segments of the stream of data to identify data
corresponding to the channel of interest. The segments may be
frames and/or packets of data that include header information. The
header information includes identity of the client module, the
source of the data, et cetera such that the client module may
readily identify the particular packets and/or frames destined for
the client module. The process then proceeds to Step 1234 where the
client module interprets the data of the channel of interest to
determine the type of data, where the type of data may be audio
data, video data, and/or text data.
[0375] The process then proceeds to Step 1236 where the client
module processes the data of the channel of interest based on the
type of data to produce processed data. The process then proceeds
to Step 1238 where the client module provides the processed data to
the client for display.
[0376] FIG. 54 illustrates a logic diagram of a method that further
describes Steps 1236 and 1238 of FIG. 53. The processing begins at
Step 1250 where the type of data is determined. The type of data
may be video data, application data, and/or audio data. For video
data, the process proceeds to Step 1252 where the client module
converts the data of the channel of interest into YUV data and/or
RGB data. When the data is received in MPEG format, the conversion
may be done as shown in Steps 1260-1268. At Step 1260, the client
module utilizes a Huffman decoder to decode the video. The process
then proceeds to Step 1262 where the Huffman decoded data is
dezigzagged.
[0377] The process then proceeds to Step 1264 where the dezigzagged
data is dequantized. The process then proceeds to Step 1266 where
the dequantized data has an inverse discrete cosine transform
function performed upon it. The process then proceeds to Step 1268
where motion compensation and/or scaling function is performed upon
the IDCT data to produce the YUV data. The YUV data may then be
converted into RGB data and stored in memory. As one of average
skill in the art will appreciate, both YUV data and RGB data may be
maintained for use by the client module and/or associated client
device.
[0378] Returning to the flow of processing video data, the process
continues at Step 1254 where the YUV data and/or the RGB data is
stored in a frame buffer (e.g., the memory of the client module
and/or memory of the client device) as the processed data. The
process then proceeds to Step 1256 where the client module
retrieves the YUV data and/or RGB data from the frame buffer at a
display rate to produce retrieved display data. The process then
proceeds to Step 1258 where the client module renders the retrieved
display data for display. The rendered data is provided to the
client device for subsequent display.
[0379] If the type of data is audio data, the process proceeds to
Step 1280. At Step 1280, the client module converts the audio data
of the channel of interest into PCM data. The process then proceeds
to Step 1282 where the client module stores the PCM data in a frame
buffer (e.g., the RAM within the client module and/or memory of the
client device) as processed data. The process then proceeds to Step
1284 where the client module retrieves the PCM data from the frame
buffer at a display rate. The process then proceeds to Step 1286
where the client module provides the retrieved display data to at
least one speaker assembly either associated with the client module
and/or within the client device.
[0380] If the type of data is application data, the process
proceeds to Step 1270. At Step 1270, the client module stores the
application data in memory as the processed data. Note that the
application data corresponds to data received via an Internet
connection, client-to-client communication, and/or telephone
communication. The process then proceeds to Step 1272 where the
client module retrieves the processed data from memory. The process
then proceeds to Step 1274 where the client module provides the
processed data to a processor. The processor may be within the
client device and/or the processor within the client device.
[0381] The process then proceeds to Step 1276 where the processor
generates video data from the processed data. The process then
proceeds to Step 1278 where the video data is provided for display
by the client device.
[0382] FIGS. 55 and 56 illustrate a logic diagram of an alternate
method for a client module to provide a channel selection request
and receive corresponding data within a multimedia system. The
process begins at Step 1290 where the client module receives an
input from a client. The input signal may be received an interface
with the client where the client includes at least one of a
personal computer, laptop computer, personal digital assistant,
video telephone, digital telephone, cellular telephone, monitor,
CRT monitor, LCD monitor, television set, high definition
television set, and/or any device that includes a video and/or
audio display device. In addition, the interface with the client
device between the client module may include a wireless
communication path such that the remote control device associated
with the client device provides the input signal to the client
module.
[0383] The process then proceeds to Step 1292 where the client
module interprets the input signal to determine the type of signal
being requested. The process then proceeds to Step 1294 where the
client module determines that the type of signal as either video,
audio, application or control. If the type of signal is audio, the
process proceeds to Step 1296 where the client module processes the
audio signal to produce generic audio data. This may be done as
shown at Step 1302 where the client module converts the audio data
into MPEG formatted audio data, MP3 formatted audio data, and/or
PCM digitized audio data.
[0384] The process then proceeds to Step 1298 where the client
module converts the generic audio data into a stream of data. This
may be done as shown in Step 1304 where the client module encodes
the generic audio data based on a data conveyance protocol to
produce the stream of data. The type of encoding may include one or
more of multi-level encoding, non-return to zero encoding,
Manchester encoding, block encoding, and/or nB/mB encoding where
n<m.
[0385] The process then proceeds to Step 1300 where the client
module transmits the stream of data to the multimedia server. The
transmission of the stream of data includes packetizing and/or
framing the data in accordance with the data conveyance protocol
used by the multimedia communication system. In addition, the
transmission of the stream of data may include utilizing a
modulation scheme such as TDM, FDM, ASK, PSK, et cetera.
[0386] If the client module determines that the type of signal is
control signals, the process proceeds to Step 1306. At Step 1306,
the client module determines whether the control information
relates to a local command or a system level command. The process
then proceeds to Step 1308 where the client module determines the
system level or local level command. If it is a system level
command, the process proceeds to Step 1310 where the client module
processes the control information for conveyance to the multimedia
server to produce a control message. The processing of the control
information may include encoding the control message based on the
data conveyance protocol of the multimedia communication system,
and utilizing the data conveyance protocol which may include
packetizing and/or framing the data as well as utilizing a
modulation scheme such as CSMA, CSMA with collision avoidance,
and/or CSMA with collision detection for packets of data and time
division multiplexing and/or frequency division multiplexing for
frames of data.
[0387] The processing then proceeds to Step 312 where the client
module transmits the control message to the multimedia server. The
control message may include the channel selection request, which
identifies the particular channel of interest for processing by the
client module.
[0388] If the type of control information relates to a local
command, the process proceeds to Step 1318. At Step 1318, the
client module locally processes the input signal to provide the
channel of interest to the client. Accordingly, the client module
may interpret the control information, which includes a channel
selection request and determines that another client is already
accessing that particular channel. As such, the client module
simply extracts the channel data destined for the other client and
utilizes it to service its client.
[0389] If the client module determines that the type of signal is
application related, the process proceeds to Step 1314. At Step
1314, the client module processes the input signal to produce
processed application data. The application data may be data
related to a network application such as email and/or web browser,
a telephone communication, and/or a client-to-client communication.
Such processing for a telephone communication would include the
similar functionality that the handset performs in a cordless
telephone.
[0390] The processing for data within the Internet access is simply
functioning as a terminal to provide input selections and/or
received data from the multimedia server, which performs the
network applications. The process then proceeds to Step 1316 where
the client module transmits the process application data to the
multimedia server. The process application data is formatted in
accordance with the data conveyance protocol of the multimedia
communication system, which includes encoding and/or a modulation
scheme.
[0391] As shown in FIG. 56, if the type of signal is video, the
processing continues at Step 1320. At Step 1320, the client module
processes the video signal to produce generic video data. This may
be done in one of a variety of ways as shown in Steps 1328-1336. At
Step 1328, the client module converts the video signal of the
channel of interest into MPEG formatted video data. At Step 1330,
the client module converts the video signal of the channel of
interest into JPEG formatted video data. At Step 1332, the client
module converts the video signal of the channel of interest into
MPEG formatted video data. At Step 1334, the client module converts
the video signal of the channel of interest into digital RGB video
data. At Step 1336, the client module converts the video signal of
the channel of interest into digital YCBCR video data. As one of
average skill in the art will appreciate, the client module is
performing a similar function as the multimedia server performs
when conveying video and/or audio data to the multimedia
server.
[0392] Returning to the main processing of video data, the process
continues at Step 1322 where the client module converts the generic
video data into a stream of data. This may be done as shown at Step
1326 where the client module encodes the generic video data based
on a data conveyance protocol of the multimedia communication
system. The data conveyance protocol may include a particular type
of encoding such as Manchester encoding, multi-level encoding, et
cetera and also a corresponding modulation scheme such as FDMA,
TDMA, CSMA, CSMA with collision avoidance, or CSMA with collision
detection. The process then proceeds to Step 1324 where the stream
of data is transmitted as either packets or frames to the
multimedia server.
[0393] FIG. 57 illustrates a logic diagram of a method for a
multimedia server to act as a hub based network access module for a
plurality of client modules. The processing steps shown in FIG. 57
as well as in FIGS. 58-62 may be performed by the multimedia server
of FIG. 2, 7 and/or 11. The processing begins at Step 1340 where
the multimedia server receives packets from at least one of a
plurality of clients. The process then proceeds to Step 1342 where
the multimedia server determines whether a network access
application is active for the particular client. If not, the
process proceeds to Step 1344 where the multimedia server opens a
network access application for the client.
[0394] Once the network access application is open, or if the
application was already open, the process proceeds to Step 1346. At
Step 1346, the multimedia server processes data of at least one of
the packets in accordance with the network access application to
produce network data. The network access application may be an
email application, web browser application, and/or any application
that allows a user to access the Internet or other wide area
network. The process then proceeds to Step 1348 where the
multimedia server determines how to access a network connection
(e.g., a modem) for transmission of the network data. Accessing the
network connection is based on a "client access to network
connection scheme", which will be subsequently discussed. The
process then proceeds to Step 1350 where the multimedia server
transports the network data via the network connection to a wide
area network based on the determined network access.
[0395] The process then proceeds to Step 1352 where the multimedia
server logs a destination address and/or source address for each
packet of network data transmitted via the network connection. The
logging enables the multimedia server to accurately track the
appropriate destination within the multimedia communication system
for the received data when it receives a response via the wide area
network. The process then proceeds to Step 1354 where the
multimedia server receives network packets via the network
connection. The process then proceeds to Step 1356 where the
multimedia server interprets a header section of the network
packets to identify a response to the network data. The response
includes an identifier that identifies the particular destination
within the multimedia communication system. The process then
proceeds to Step 1358 where the multimedia server provides the
network packets to the particular client associated with the
network data.
[0396] FIG. 58 illustrates a logic diagram that further defines the
determination of whether the network access application is active
as shown in Step 1342 of FIG. 57. The processing begins at Step
1360 where the multimedia server interprets a header section of at
least one of the packets received from the client to identify the
individual client. The process then proceeds to Step 1362 where the
multimedia server interprets the header section to determine the
particular type of network access being requested. The process then
proceeds to Step 1364 where the multimedia server determines
whether the network application is active based on the identity of
the particular client and the type of network access being
requested.
[0397] FIG. 59 illustrates a logic diagram for the determination of
the particular type of network access of Step 1362 of FIG. 58. This
may be done at either Step 1366 or Step 1368. At Step 1366, the
multimedia server interprets the header section of the at least one
packet to determine email network access. At Step 1368, the
multimedia server interprets the header section of the packet or
packets to determine a web browser network access.
[0398] FIG. 60 illustrates a logic diagram of a method that further
describes the determination of access to the network connection of
Step 1348 of FIG. 57. This may be done in one or more of Steps
1370-1378. At Step 1370, the multimedia server utilizes a time
division multiplexing accessing scheme to provide access to the
network connection for each of the clients that currently have an
active network access application. At Step 1372, the multimedia
server utilizes a carrier sensed multiple access process to
determine the access to the network connection among the clients
that currently have an active network access application.
[0399] At Step 1374, the multimedia server utilizes a token passing
scheme among the clients that currently have an active network
access application to determine access to the network connection.
At Step 1376, the multimedia server utilizes a queuing scheme of
the network data for each client that has a currently active
network access application open. The queuing scheme may be based on
a first-in first-out buffering arrangement. At Step 1378, the
multimedia server responds to a request for access to the network
connection from the resources within the channel mixer processing
the particular request.
[0400] FIG. 61 illustrates a logic diagram of an alternate method
for a multimedia server to act as a hub based network access
connection for a plurality of clients. The processing begins at
Step 1380 where the multimedia server receives packets from at
least one of a plurality of clients. The process then proceeds to
Step 1382 where the multimedia server interprets each packet to
determine whether the packet is a client-to-client packet or
network packet. The interpretation is done by reviewing the header
section of the packet, which includes an indication as to whether
it is client-to-client data or network data.
[0401] The process then proceeds to Step 1384 where the multimedia
server determines whether the packet relates to client-to-client
data or network data. For client-to-client data, the process
proceeds to Step 1386 where the multimedia server processes the
packet to produce processed client packets. Such processing
includes packetizing the client-to-client communication for
subsequent transmission to one or more other clients within the
multimedia communication system.
[0402] The process then proceeds to Step 1388 where the multimedia
server multiplexes the process client packets for transmission to
the plurality of clients, which yields multiplex client packets.
The process client packets are also multiplexed with network data
destined for clients, video data destined for clients and/or audio
data destined for clients. The process then proceeds to Step 1390
where the multimedia server transmits the multiplex client data to
the plurality of clients in accordance with the data conveyance
protocol used within the multimedia communication system.
[0403] If the packet corresponds to network data, the process
proceeds to Step 1392 where the multimedia server identifies at
least one of the clients from the packet. The process then proceeds
to Step 1394 where the multimedia server determines whether a
network access application is active for the particular client. If
not, the process proceeds to Step 1396 where the multimedia server
opens a network access application (e.g., email and/or web browser
application) for the particular client.
[0404] Once a network application is open or has been opened, the
process proceeds to Step 1398 where the multimedia server processes
data of the network packets in accordance with the network access
application to produce network data. The process then proceeds to
Step 1400 where the multimedia server determines access to the
network connection for transmission of the network data based on
the client access to network connection scheme. The process then
proceeds to Step 1402 where the multimedia server transports the
network data via the network connection to a wide area network
based on the determine network access. The determination of Step
1400 has been explained in greater detail with reference to FIG. 60
and the determination of Step 1394 has been explained in greater
detail with reference to FIGS. 58 and 59.
[0405] FIG. 62 illustrates a logic diagram of a method for a
multimedia server to function as a hub base network access for a
plurality of clients. The process begins at Step 1420 where the
multimedia server receives network packets via a network
connection. The network packets are received from a wide area
network system such as the Internet in response to information
provided by the multimedia server on behalf of one or more clients.
The process then proceeds to Step 1422 where the multimedia server
determines identity of at least one client that is a target of the
network packet. This may be done by interpreting a header section
of the network packet where the header section includes the
destination address, which corresponds to an individual client. As
such, each network packet that is received, the multimedia server
may readily determine the appropriate client.
[0406] The process then proceeds to Step 1424 where the multimedia
server determines whether a network access application is active
for the particular client. The network application may be an email
application and/or a web browser application. If the particular
network access application is not active, the process proceeds to
Step 1426 where the multimedia server opens one for the particular
client.
[0407] With a network access application open, the process proceeds
to Step 1428 where the multimedia server processes data of the
network packets to produce client data. The processing of the data
may include preparing display data corresponding to the execution
of the network application upon the incoming network packets and
storing the resulting data as client data. The process then
proceeds to Step 1430 where the multimedia server multiplexes
client data for transmission to the plurality of clients. The
client data may be multiplexed with other data destined for the
clients, such other data includes video data, audio data, and/or
other application data. The process then proceeds to Step 1432
where the multimedia server transmits the multiplex client data to
the plurality of clients in accordance with the data conveyance
protocol of the multimedia communication system.
[0408] The processing continues at Step 1434 where the multimedia
server receives client-to-client packets from at least one client.
The process then proceeds to Step 1434 where the multimedia server
processes the client-to-client packets to produce processed client
packets. The process then proceeds to Step 1438 where the
multimedia server multiplexes the processed client packets with
other client data for transmission to the plurality of clients. The
process then proceeds to Step 1440 where the multimedia server
transmits the multiplex client data to the plurality of
clients.
[0409] FIG. 63 illustrates a logic diagram of a method for managing
resources within a multimedia system. The processing illustrating
in FIG. 63, as well as those illustrated in FIGS. 64 & 65, may
be executed by any one of the multimedia servers illustrated in
FIGS. 1-11. The processing begins at Step 1450 where the multimedia
server receives a client request for a multimedia service. The
multimedia system service includes one or more of accessing a
channel from a satellite connection, cable connection, NTSC
broadcast connection, HDTV broadcast connection, SDTV broadcast
connection, output of a VCR DVD radio receiver, CD player, MP3
player, et cetera.
[0410] The process then proceeds to Step 1452 where the multimedia
server determines whether the client request is valid. The
determination of whether the client request is valid may be based
on whether the particular client has access to the particular video
program that is being requested, determining whether the particular
channel that is being selected exceeds parental control settings,
and/or determining whether the clients request is received during
an assigned access time. Accordingly, the assigned access time
period corresponds to the time of day in which the user of the
particular module may access services from the multimedia server.
If the client request is not valid, the process proceeds to Step
1456 where the multimedia server denies the request.
[0411] If, however, the request is valid, the process proceeds to
Step 1458. At Step 1458, the multimedia server determines whether
the multimedia system has sufficient resources to fulfill the
client request. The determination of whether the multimedia system
has sufficient resources includes determining whether the tuning
module has the capacity to accommodate the client request, the
channel mixer has sufficient processing resources to process the
client request, and/or whether the communication path between the
multimedia server and the plurality of clients has sufficient
bandwidth to accommodate the client request.
[0412] The process then proceeds to Step 1460 where a determination
is made as to whether sufficient resources exist. If they do, the
process proceeds to Step 1462. At Step 1462, the multimedia server
allocates at least some of the resources to fulfill the client
request based on a multimedia system resource allocation procedure.
The multimedia system resource allocation procedure includes
allocating the resources in a first-come-first-serve basis,
allocating the resources in a trunked manner, and/or allocating the
resources based on a predetermined assignment of particular
resources to a particular client. Accordingly, a particular tuner,
stream parsing module may be allocated to a particular client. As
such, these resources would remain idle unless the particular
client desires access to the multimedia system.
[0413] In addition to allocating the resources as shown in Step
1462, the multimedia system may also provide the functionality as
shown in Steps 1464-1468. At Step 1464, the multimedia server
determines whether the system has access available resources. If
not, the process reverts to Step 1462. If so, the process proceeds
to Step 1466 where the multimedia server determines whether the
client has enhance feature privileges. The enhance feature
privileges allow the client's favorite channels to be selected and
processed by the multimedia server, previous-channel, next-channel,
picture-in-picture, et cetera. If the client does not have the
enhance features, the process reverts to Step 1462. If, however,
the client has advanced features, the process proceeds to Step
1468. At Step 1468, the multimedia server allocates further
resources to support the enhance features of the client.
[0414] If sufficient resources are not available, the process
proceeds to FIG. 64, which provides a variety of alternatives for
handling insufficient resources. One such approach is to remove the
enhance features provided to particular clients to make resources
available. Alternate processes are shown at Steps 1464, 1474 and
1478.
[0415] At Step 1464, the multimedia server determines whether an
alternate multimedia service is available for the particular
client. This may be done as shown in one or more of Steps
1466-1472. At Step 1466, the multimedia server, for a video
program, adjusts the resolution of the display to a default
resolution, which reduces the processing requirements. At Step
1468, the multimedia server, for a video program, adjusts the video
quality to a default video quality, which reduces the processing
requirements to prepare the video data for the client.
[0416] At Step 1470, the multimedia server queries the client to
select an alternative multimedia service. The query may include a
listing of channels currently being serviced and requesting that
the client select one of those, and/or select an alternate
resolution, video quality, et cetera. At Step 1472, the multimedia
server automatically selects an alternative multimedia service
based on pre-programmed alternate selections. In essence, the
client may pre-program its default settings or alternate multimedia
services as opposed to being directly queried.
[0417] At Step 1474, the multimedia server determines whether the
client request has priority over currently serviced other client
request. If so, the process proceeds to Step 1476 where the
multimedia server preempts currently serviced client(s) to obtain
the resources to fill the present client request. If the current
client request does not have priority over at least one other
currently serviced client, the present client's request is denied,
and the client may be requested to access an alternative multimedia
service.
[0418] At Step 1478, the multimedia server determines whether
allocation of resources can be reallocated to fill the client
request. The process then proceeds to Step 1480 where the
multimedia server adjusts allocation of the resources to fulfill
the client request when the resources can be reallocated. The
determination of whether resources can be reallocated is further
described in Steps 1482 and 1484. At Step 1482, the multimedia
server monitors the use of the resources in comparisons of the
capabilities of the resources. The process then proceeds to Step
1484 where the multimedia server adjusts the allocation of
resources when the use of at least some of the resources is not
optimal. For example, if a particular resource is most efficient
when processing compressed video from an HDTV source, satellite
source, et cetera and is currently processing audio signals, the
resource may be reallocated to process video signals while another
resource is used to process the audio signals.
[0419] FIG. 65 illustrates a logic diagram of a method for managing
resources within a multimedia system. The process begins at Step
1490 where a multimedia server receives a client request for a
multimedia service from a client. The multimedia service includes
one or more of accessing a video source such as a channel of a
satellite connection, channel of a cable connection, DVD player,
VCR, and/or an audio source such as a CD player, DVD audio player,
et cetera. The process then proceeds to Step 1492 where the
multimedia server determines whether the client request is valid.
If the client request is not valid as indicated at Step 1494, the
process proceeds to Step 1496 where the multimedia server denies
the request.
[0420] If, however, the request is valid, the process proceeds to
Step 1498 where the multimedia server determines whether the
multimedia system has sufficient resources available to fulfill the
client request. The process then proceeds to Step 1500 where the
multimedia server branches based on whether sufficient resources
exist. If sufficient resources exist, the process proceeds to Step
1502. At Step 1502, the multimedia server allocates best-matched
resources to fulfill a client request. If sufficient resources do
not exist, the processing at FIG. 64 is utilized.
[0421] To determine the best match resources to fulfill the client
request, Steps 1504-1508 may be utilized. At Step 1504, the
multimedia server maintains a listing of resource capabilities for
each of the plurality of resources. The process then proceeds to
Step 1506 where the multimedia server determines the type of
resources needed to support the client request. The process then
proceeds to Step 1508 where the multimedia server performs a best
match analysis to identify the best match resources based on the
resource capabilities and the type of resources needed. For
example, resources within a tuning module and/or channel mixer may
be most efficient when processing compressed video data from a
satellite connection while others may be more adept at processing
audio signals. As such, when a request for access to compressed
video signal is received, the multimedia server attempts to
allocate the resources that are best fitted to process the
compressed video. Correspondingly, when a request for access to an
audio source is received, the multimedia server attempts to
allocate the best resources to fulfill the audio request.
[0422] The preceding discussion has presented a method and
apparatus for a multimedia communication system. The multimedia
communication system allows a plurality of clients to have apparent
direct access to a variety of audio sources, video sources, the
internet, the public switch telephone network, et cetera without
the typical receiving and transmitting circuitry associated with
conventional direct access to such services. As one of average
skill in the art will appreciate, other embodiments may be derived
from the teaching of the present invention, without deviating from
the scope of the claims.
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