U.S. patent application number 16/190051 was filed with the patent office on 2019-03-14 for method for receiving enhanced service and display apparatus thereof.
The applicant listed for this patent is LG ELECTRONICS INC.. Invention is credited to Jaehee CHUNG, Aettie JI, Jinpil KIM, Kwansuk KIM, Kyungho KIM, Sanghyun KIM, Hyeonjae LEE, Joonhui LEE, Kyoungsoo MOON, Sungok PARK, Dongwan SEO, Youngjae SEO, Jongyeul SUH.
Application Number | 20190082212 16/190051 |
Document ID | / |
Family ID | 46146328 |
Filed Date | 2019-03-14 |
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United States Patent
Application |
20190082212 |
Kind Code |
A1 |
KIM; Sanghyun ; et
al. |
March 14, 2019 |
METHOD FOR RECEIVING ENHANCED SERVICE AND DISPLAY APPARATUS
THEREOF
Abstract
Provided are a method of receiving an enhanced service and a
video display device thereof. The method includes: receiving an
audio-visual (AV) content; extracting first feature information
from the received AV content; receiving a database including at
least one of content information, enhanced service information, and
an enhanced service, which correspond to the first feature
information, from a first server by transmitting the extracted
first feature information to the first server; storing the database
received from the first server in a memory; extracting second
feature information from the received AV content; and searching and
obtaining one of content information, enhanced service information,
and an enhanced service, which correspond to the extracted feature
information, from the database.
Inventors: |
KIM; Sanghyun; (Seoul,
KR) ; SUH; Jongyeul; (Seoul, KR) ; KIM;
Kwansuk; (Seoul, KR) ; LEE; Joonhui; (Seoul,
KR) ; CHUNG; Jaehee; (Seoul, KR) ; LEE;
Hyeonjae; (Seoul, KR) ; KIM; Jinpil; (Seoul,
KR) ; SEO; Dongwan; (Seoul, KR) ; MOON;
Kyoungsoo; (Seoul, KR) ; JI; Aettie; (Seoul,
KR) ; SEO; Youngjae; (Seoul, KR) ; KIM;
Kyungho; (Seoul, KR) ; PARK; Sungok; (Seoul,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LG ELECTRONICS INC. |
Seoul |
|
KR |
|
|
Family ID: |
46146328 |
Appl. No.: |
16/190051 |
Filed: |
November 13, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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14556014 |
Nov 28, 2014 |
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16190051 |
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13988995 |
May 22, 2013 |
8990876 |
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PCT/KR2011/009043 |
Nov 24, 2011 |
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14556014 |
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61549238 |
Oct 20, 2011 |
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61549237 |
Oct 20, 2011 |
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61536064 |
Sep 19, 2011 |
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61525840 |
Aug 21, 2011 |
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61421623 |
Dec 9, 2010 |
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61417209 |
Nov 24, 2010 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04N 21/4263 20130101;
H04N 21/4722 20130101; H04N 21/2393 20130101; H04N 21/4394
20130101; H04N 21/435 20130101; H04N 21/2665 20130101; H04N 21/437
20130101; H04N 21/8133 20130101; H04N 21/6377 20130101; H04N 21/43
20130101; H04N 21/44008 20130101; H04N 21/8173 20130101 |
International
Class: |
H04N 21/437 20060101
H04N021/437; H04N 21/81 20060101 H04N021/81; H04N 21/239 20060101
H04N021/239; H04N 21/6377 20060101 H04N021/6377; H04N 21/439
20060101 H04N021/439; H04N 21/2665 20060101 H04N021/2665; H04N
21/435 20060101 H04N021/435; H04N 21/426 20060101 H04N021/426; H04N
21/44 20060101 H04N021/44; H04N 21/43 20060101 H04N021/43; H04N
21/4722 20060101 H04N021/4722 |
Claims
1-8. (canceled)
9. A video display device comprising: a display unit; a receiving
unit configured to obtain a broadcast content; and a control unit
configured to execute automatic content recognition (ACR)
application, wherein the control unit is further configured to:
extract one or more video frames from the broadcast content,
transmit a first query including the one or more video frames to a
first server, obtain an address of a second server based on the
first query, and transmit, to the second server, a second query
based on the address of the second server, and obtain an enhanced
service based on the second query, wherein the display unit
displays the obtained enhanced service overlaid on the broadcast
content, wherein the enhanced service is a voting event related to
the broadcast content.
10. The video display device according to claim 9, wherein the
voting event is time-related to the broadcast content,
11. The video display device according to claim 9, wherein the
enhanced service is displayed semi-transparently.
12. The video display device according to claim 9, wherein the
display unit displays a notification message for notifying the
voting event.
13. The video display device according to claim 12, wherein the
display unit displays a button with the notification message,
wherein the display unit displays enhanced information related to
the enhanced service, if an input of user for the button is
received.
14. The video display device according to claim 13, wherein the
display unit displays a voting question with an user interface for
receiving an user input for voting question.
15. The video display device according to claim 14, wherein the
display unit displays a voting result with the voting question.
16. The video display device according to claim 9, wherein the
receiving unit includes a tuner to receive a broadcast signal
including the broadcast content.
17. The video display device according to claim 9, wherein the
broadcast content is uncompressed video content.
18. An operating method of a video display device comprising:
obtaining a broadcast content through a receiving unit; extracting
one or more video frames from the broadcast content; transmitting a
first query including the one or more video frames to a first
server; obtaining an address of a second server based on the first
query; transmitting, to the second server, a second query based on
the address of the second server; obtaining an enhanced service
based on the second query; and displaying the enhanced service
overlaid on the broadcast content, wherein the enhanced service is
a voting event related to the broadcast content.
19. The operating method of the video display device according to
claim 18, wherein the voting event is time-related to the broadcast
content.
20. The operating method of the video display device according to
claim 18, wherein the enhanced service is displayed
semi-transparently.
21. The operating method of the video display device according to
claim 18, wherein the displaying the enhanced service overlaid on
the broadcast content comprises, displaying a notification message
for notifying the voting event.
22. The operating method of the video display device according to
claim 21, wherein the displaying a notification message for
notifying the voting event comprises, displaying a button with the
notification message, and displaying enhanced information related
to the enhanced service, if an input of user for the button is
received.
23. The operating method of the video display device according to
claim 22, wherein the displaying the enhanced service overlaid on
the broadcast content comprises displaying a voting question with
an user interface for receiving an user input for voting
question.
24. The operating method of the video display device according to
claim 23, wherein the displaying the voting question comprises,
displaying a voting result with the voting question.
25. The operating method of the video display device according to
claim 18, the obtaining the broadcast content comprises: receiving
a broadcast signal including the broadcast content though a
tuner.
26. The operating method of the video display device according to
claim 18, wherein the broadcast content is uncompressed video
content.
Description
TECHNICAL FIELD
[0001] The present disclosure relates to a method of receiving an
enhanced service and a video display device thereof.
BACKGROUND ART
[0002] As digital broadcasting is paving the way for its extensive
spread, a broadcasting station transmits both main audio-visual
(AV) contents and enhanced service data, which may be linked to the
main AV contents to provide information and services or may be
separately provided for other purposes.
[0003] However, a video display device in each home may unlikely
receive broadcast signals directly through air under a current
broadcasting environment. Rather, most of cases, a video display
device in each home is connected to a broadcast receiving device to
display uncompressed audio-visual contents that the broadcast
receiving device provides.
[0004] Additionally, the broadcast receiving device receives
contents from a server (called a Multichannel Video Programming
Distributor (MVPD)). The MVPD receives a broadcast signal from a
broadcasting station, extracts contents from the received broadcast
signal, converts the extracted content into signals having a proper
format for transmission, and provides the converted signals to a
broadcast receiving device. During these processes, the MVPD may
exclude extracted enhanced service data or may add another enhanced
service data, so that the broadcasting station may serve to provide
AV contents but may not provide enhanced services led by the
broadcasting station.
[0005] Since the broadcast receiving device extracts main AV data
from signal received from the MVPD and provides only uncompressed
audio-visual data to a video display device, only enhanced services
provided from the broadcast receiving device not the video display
device are available. Furthermore, the broadcasting station may not
provide enhanced services led by itself.
[0006] Additionally, even when the broadcasting station provides
enhanced services through wireless channels, the enhanced services
may not be provided enough due to bandwidth limitation.
DISCLOSURE
Technical Problem
[0007] Embodiments provide a method of receiving an enhanced
service and a video display device thereof which make it possible
for the broadcasting station to lead enhanced services.
Technical Solution
[0008] In one embodiment, a method of receiving an enhanced service
in a video display device playing a content includes: receiving an
audio-visual (AV) content; extracting first feature information
from the received AV content; receiving a database including at
least one of content information, enhanced service information, and
an enhanced service, which correspond to the first feature
information, from a first server by transmitting the extracted
first feature information to the first server; storing the database
received from the first server in a memory; extracting second
feature information from the received AV content; and searching and
obtaining one of content information, enhanced service information,
and an enhanced service, which correspond to the extracted feature
information, from the database.
[0009] In another embodiment, a method of receiving an enhanced
service in a video display device playing a content includes:
receiving an AV content; extracting first feature information from
the received AV content; receiving content information
corresponding to the first feature information from a first server
by transmitting the extracted first feature information to the
first server; extracting second feature information from the
received AV content; and receiving content information
corresponding to the second feature information from the first
server by transmitting the extracted second feature information in
addition to the received content information from the first server
to the first server.
[0010] In further another embodiment, a method of receiving an
enhanced service in a video display device playing a content
includes: receiving an AV content; selecting one of a plurality of
content recognizing modules supporting respectively different
recognizing methods according to a predetermined priority; and
receiving an enhanced service corresponding to content
identification information by transmitting the content
identification information on the AV content obtained by using the
selected content recognizing module.
[0011] In still further another embodiment, a method of receiving
an enhanced service in a video display device playing a content
includes: setting at least one sampling parameter to extract some
samples from an AV content; obtaining a sample by sampling the AV
content according to the set parameter; and receiving content
identification information on the AV content from a server by
transmitting the obtained sample to the server.
[0012] In still further another embodiment, a video display device
playing a content includes: a receiving unit receiving an
audio-visual (AV) content; a feature extracting unit extracting
first feature information from the received AV content; a data
transmitting/receiving unit receiving a database including at least
one of content information, enhanced service information, and an
enhanced service, which correspond to the first feature
information, from a first server by transmitting the extracted
first feature information to the first server; storing the database
received from the first server in a memory; and a memory storing
second feature information extracted from the AV content, wherein
one of content information, enhanced service information, and an
enhanced service, which correspond to the extracted feature
information from the AV content, is obtained by searching the
database. One of content information, enhanced service information,
and an enhanced service, which correspond to second feature
information extracted from the AV content is obtained by searching
the database.
[0013] In still further another embodiment, a video display device
playing a content includes: a receiving unit receiving an AV
content; a feature extracting unit extracting first feature
information from the received AV content; and a data
transmitting/receiving unit receiving content information
corresponding to the first feature information from a first server
by transmitting the extracted first feature information to the
first server, wherein the data transmitting/receiving unit receives
content information corresponding to the second feature information
from the first server by transmitting second feature information
extracted from the AV content in addition to the received content
information from the first server to the first server.
[0014] In still further another embodiment, a video display device
playing a content includes: a receiving unit receiving an AV
content; a plurality of content recognizing modules supporting
respectively different recognizing methods; a control unit
selecting one of the plurality of content recognizing modules
according to a predetermined priority; and a data
transmitting/receiving unit receiving an enhanced service
corresponding to content identification information by transmitting
the content identification information on the AV content obtained
by using the selected content recognizing module.
[0015] In still further another embodiment, a video display device
playing a content includes: a parameter setting unit setting at
least one sampling parameter to extract some samples from an AV
content; a receiving unit receiving an AV content; a sampling unit
obtaining a sample by sampling the AV content according to the set
parameter; and a data transmitting/receiving unit receiving content
identification information on the received AV content by
transmitting the obtained sample to a server.
Technical Effect
[0016] According to embodiments, services led by a broadcasting
station are available. Especially, the embodiments provide
alternative advertising services, scene associated information
providing services, rating-based content services, and user
attribute-based services.
[0017] According to embodiments, a database including content
information related to a currently played AV content is generated
in a video display device or a server, so that content recognizing
speed is improved, and a network bandwidth is efficiently used.
[0018] According to embodiments, since content is recognized by
selecting a plurality of content recognizing modules in a video
display device according to a priority, various content recognizing
manners may be available.
[0019] According to embodiments, since an AV content is sampled and
transmitted to a server according to a sampling parameter
negotiated with a server in advance, it is efficiently recognized
according to various content recognizing manners.
[0020] Moreover, according to embodiments, information search,
chatting, news search, digital media download, product catalog
download, and product purchase, which are related to main AV
contents, are available without inconvenient text input using a
remote controller.
[0021] Additionally, according to embodiments, enhanced services
exceeding the bandwidth limitation of a wireless channel become
available.
DESCRIPTION OF DRAWINGS
[0022] FIG. 1 is a block diagram illustrating the network topology
according to the embodiment.
[0023] FIG. 2 is a block diagram illustrating a watermark based
network topology according to an embodiment.
[0024] FIG. 3 is a ladder diagram illustrating a data flow in a
watermark based network topology according to an embodiment.
[0025] FIG. 4 is view illustrating a watermark based content
recognition timing according to an embodiment.
[0026] FIG. 5 is a block diagram illustrating a fingerprint based
network topology according to an embodiment.
[0027] FIG. 6 is a ladder diagram illustrating a data flow in a
fingerprint based network topology according to an embodiment.
[0028] FIG. 7 is a view illustrating an XML schema diagram of
ACR-Resulttype containing a query result according to an
embodiment.
[0029] FIG. 8 is a block diagram illustrating a watermark and
fingerprint based network topology according to an embodiment.
[0030] FIG. 9 is a ladder diagram illustrating a data flow in a
watermark and fingerprint based network topology according to an
embodiment.
[0031] FIG. 10 is a block diagram illustrating the video display
device according to the embodiment.
[0032] FIG. 11 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0033] FIG. 12 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0034] FIG. 13 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0035] FIG. 14 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0036] FIG. 15 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0037] FIG. 16 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0038] FIG. 17 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0039] FIG. 18 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0040] FIG. 19 is a flowchart illustrating a method of
synchronizing a play time of a main AV content with a play time of
an enhanced service according to an embodiment.
[0041] FIG. 20 is a conceptual diagram illustrating a method of
synchronizing a play time of a main AV content with a play time of
an enhanced service according to an embodiment.
[0042] FIG. 21 is a screen when an auto playing application is
executed according to an embodiment.
[0043] FIG. 22 is a screen when a content provider application is
executed according to an embodiment.
[0044] FIG. 23 is a screen when a video display device manufacturer
application having a resizing user interface is executed according
to an embodiment.
[0045] FIG. 24 is a screen when a video display device manufacturer
application having an overlay user interface is executed according
to an embodiment.
[0046] FIG. 25 is a flowchart illustrating a method of executing a
video display device manufacturer application according to an
embodiment.
[0047] FIG. 26 is a screen when an application selection menu is
displayed according to an embodiment.
[0048] FIG. 27 is a screen when an all sub menu of a program main
menu in a video display device manufacturer application is selected
according to an embodiment.
[0049] FIG. 28 is a screen when a participation sub menu of a
program main menu in a video display device manufacturer
application is selected according to an embodiment.
[0050] FIG. 29 is a screen when a discovery sub menu of a program
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0051] FIG. 30 is flowchart illustrating a searching method
according to an embodiment.
[0052] FIG. 31 is a screen when a search sub menu of an information
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0053] FIG. 32 is another screen when a search sub menu of an
information main menu in a video display device manufacturer
application is selected according to an embodiment.
[0054] FIG. 33 is flowchart illustrating a chatting window
displaying method according to an embodiment.
[0055] FIG. 34 is a screen when a Twitter sub menu of an
information main menu in a video display device manufacturer
application is selected according to an embodiment.6
[0056] FIG. 35 is a flowchart illustrating a news obtaining method
according to an embodiment.
[0057] FIG. 36 is a screen when a news sub menu of an information
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0058] FIG. 37 is flowchart illustrating a viewer list displaying
method according to an embodiment.
[0059] FIG. 38 is a screen when a viewer list sub menu of a social
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0060] FIG. 39 is a signal flow when a video display device obtains
a friends list and watching information according to an
embodiment.
[0061] FIG. 40 is a signal flow when a video display device obtains
a friends list and watching information according to another
embodiment.
[0062] FIG. 41 is flowchart illustrating a preference displaying
method according to an embodiment.
[0063] FIG. 42 is a screen when a preference display sub menu of a
social main menu in a video display device manufacturer application
is selected according to an embodiment.
[0064] FIG. 43 is flowchart illustrating a digital media
downloading method according to an embodiment.
[0065] FIG. 44 is a screen when a previous episode sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0066] FIG. 45 is a screen when a VOD sub menu of a recommendation
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0067] FIG. 46 is a screen when an application sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0068] FIG. 47 is flowchart illustrating a catalog displaying
method according to an embodiment.
[0069] FIG. 48 is a screen when a style sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0070] FIG. 49 is a screen when a music sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0071] FIG. 50 is a screen when another sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0072] FIG. 51 is a view of a user interface for controlling an ACR
function according to an embodiment.
[0073] FIG. 52 is a flowchart illustrating a method of controlling
a video display device according to the embodiment.
[0074] FIG. 53 is a flowchart illustrating a method of receiving an
enhanced service according to a first embodiment.
[0075] FIGS. 54 to 57 are block diagram illustrating a
configuration of a video display device having an internal database
according to embodiments.
[0076] FIG. 58 is a flowchart illustrating a method of receiving an
enhanced service according to a second embodiment.
[0077] FIG. 59 is a block diagram illustrating an operation between
a video display device and a fingerprint server according to a
first embodiment.
[0078] FIGS. 60 and 61 are views illustrating a method of
generating a new database in a server according to an
embodiment.
[0079] FIG. 62 is a block diagram illustrating an operation between
a video display device and a fingerprint server according to a
second embodiment.
[0080] FIG. 63 is a block diagram illustrating an operation between
a video display device and a fingerprint server according to a
third embodiment.
[0081] FIGS. 64 and 65 are block diagrams illustrating an operation
of a video display device having a plurality of content recognizing
modules.
[0082] FIG. 66 is a flowchart illustrating a method of receiving an
enhanced server according to a third embodiment.
[0083] FIG. 67 is a flowchart illustrating a method of receiving an
enhanced server according to a fourth embodiment.
[0084] FIGS. 68 and 69 are views illustrating a sampling area of a
video sample according to embodiments.
[0085] FIG. 70 is a ladder diagram illustrating a method of setting
a sampling parameter according to a first embodiment.
[0086] FIGS. 71 to 74 are views illustrating parameter values
exchanged between a video display device and a server during
parameter setting processes according to embodiments.
[0087] FIG. 70 is a ladder diagram illustrating a method of setting
a sampling parameter according to a second embodiment.
[0088] FIG. 76 is a block diagram illustrating a configuration of a
video display device sampling an AV content.
[0089] FIG. 77 is a block diagram illustrating a configuration of a
server identifying a content by using a received sample from a
video display device.
[0090] FIG. 78 is a block diagram illustrating a structure of a
fingerprint-based video display device according to another
embodiment.
[0091] FIG. 79 is a block diagram illustrating a structure of a
watermark-based video display device according to another
embodiment.
MODE FOR INVENTION
[0092] Hereinafter, a mobile terminal relating to the present
invention will be described in more detail with reference to the
accompanying drawings. Noun suffixes such as "engine", "module",
and "unit" for components in description below are given or mixed
in consideration of easiness in writing the specification. That is,
the noun suffixes themselves does not have respectively
distinguishable meanings or roles.
[0093] A network topology will be described with reference to FIGS.
1 to 9 according to an embodiment.
[0094] FIG. 1 is a block diagram illustrating the network topology
according to the embodiment.
[0095] As shown in FIG. 1, the network topology includes a content
providing server 10, a content recognizing service providing server
20, a multi-channel video distributing server 30, an enhanced
service information providing server 40, a plurality of enhanced
service providing servers 50, a broadcast receiving device 60, a
network 70, and a video display device 100.
[0096] The content providing server 10 may correspond to a
broadcasting station and broadcasts a broadcast signal including
main audio-visual contents. The broadcast signal may further
include enhanced services. The enhanced services may or may not
relate to main audio-visual contents. The enhanced services may
have formats such as service information, metadata, additional
data, compiled execution files, web applications, Hypertext Markup
Language (HTML) documents, XML documents, Cascading Style Sheet
(CSS) documents, audio files, video files, ATSC 2.0 contents, and
addresses such as Uniform Resource Locator (URL). There may be at
least one content providing server.
[0097] The content recognizing service providing server 20 provides
a content recognizing service that allows the video display device
100 to recognize content on the basis of main audio-visual content.
The content recognizing service providing server 20 may or may not
edit the main audio-visual content. There may be at least one
content recognizing service providing server.
[0098] The content recognizing service providing server 20 may be a
watermark server that edits the main audio-visual content to insert
a visible watermark, which may look a logo, into the main
audio-visual content. This watermark server may insert the logo of
a content provider at the upper-left or upper-right of each frame
in the main audio-visual content as a watermark.
[0099] Additionally, the content recognizing service providing
server 20 may be a watermark server that edits the main
audio-visual content to insert content information into the main
audio-visual content as an invisible watermark.
[0100] Additionally, the content recognizing service providing
server 20 may be a fingerprint server that extracts feature
information from some frames or some audio samples of the main
audio-visual content and stores it. This feature information is
called signature.
[0101] The multi-channel video distributing server 30 receives and
multiplexes broadcast signals from a plurality of broadcasting
stations and provides the multiplexed broadcast signals to the
broadcast receiving device 60. Especially, the multi-channel video
distributing server 30 performs demodulation and channel decoding
on the received broadcast signals to extract main audio-visual
content and enhanced service, and then, performs channel encoding
on the extracted main audio-visual content and enhanced service to
generate a multiplexed signal for distribution. At this point,
since the multi-channel video distributing server 30 may exclude
the extracted enhanced service or may add another enhanced service,
a broadcasting station may not provide services led by it. There
may be at least one multi-channel video distributing server.
[0102] The broadcasting device 60 may tune a channel selected by a
user and receives a signal of the tuned channel, and then, performs
demodulation and channel decoding on the received signal to extract
a main audio-visual content. The broadcasting device decodes the
extracted main audio-visual content through H.264/Moving Picture
Experts Group-4 advanced video coding (MPEG-4 AVC), Dolby AC-3 or
Moving Picture Experts Group-2 Advanced Audio Coding (MPEG-2 AAC)
algorithm to generate an uncompressed main audio-visual (AV)
content. The broadcast receiving device 60 provides the generated
uncompressed main AV content to the video display device 100
through its external input port.
[0103] The enhanced service information providing server 40
provides enhanced service information on at least one available
enhanced service relating to a main AV content in response to a
request of a video display device. There may be at least one
enhanced service providing server. The enhanced service information
providing server 40 may provide enhanced service information on the
enhanced service having the highest priority among a plurality of
available enhanced services.
[0104] The enhanced service providing server 50 provides at least
one available enhanced service relating to a main AV content in
response to a request of a video display device. There may be at
least one enhanced service providing server.
[0105] The video display device 100 may be a television, a notebook
computer, a hand phone, and a smart phone, each including a display
unit. The video display device 100 may receive an uncompressed main
AV content from the broadcast receiving device 60 or a broadcast
signal including an encoded main AV content from the contents
providing server 10 or the multi-channel video distributing server
30. The video display device 100 may receive a content recognizing
service from the content recognizing service providing server 20
through the network 70, an address of at least one available
enhanced service relating to a main AV content from the enhanced
service information providing server 40 through the network 70, and
at least one available enhanced service relating to a main AV
content from the enhanced service providing server 50.
[0106] At least two of the content providing server 10, the content
recognizing service providing server 20, the multi-channel video
distributing server 30, the enhanced service information providing
server 40, and the plurality of enhanced service providing servers
50 may be combined in a form of one server and may be operated by
one provider.
[0107] FIG. 2 is a block diagram illustrating a watermark based
network topology according to an embodiment.
[0108] As shown in FIG. 2, the watermark based network topology may
further include a watermark server 21.
[0109] As shown in FIG. 2, the watermark server 21 edits a main AV
content to insert content information into it. The multi-channel
video distributing server 30 may receive and distribute a broadcast
signal including the modified main AV content. Especially, a
watermark server may use a digital watermarking technique described
below.
[0110] A digital watermark is a process for inserting information,
which may be almost undeletable, into a digital signal. For
example, the digital signal may be audio, picture, or video. If the
digital signal is copied, the inserted information is included in
the copy. One digital signal may carry several different watermarks
simultaneously.
[0111] In visible watermarking, the inserted information may be
identifiable in a picture or video. Typically, the inserted
information may be a text or logo identifying a media owner. If a
television broadcasting station adds its logo in a corner of a
video, this is an identifiable watermark.
[0112] In invisible watermarking, although information as digital
data is added to audio, picture, or video, a user may be aware of a
predetermined amount of information but may not recognize it. A
secret message may be delivered through the invisible
watermarking.
[0113] One application of the watermarking is a copyright
protection system for preventing the illegal copy of digital media.
For example, a copy device obtains a watermark from digital media
before copying the digital media and determines whether to copy or
not on the bases of the content of the watermark.
[0114] Another application of the watermarking is source tracking
of digital media. A watermark is embedded in the digital media at
each point of a distribution path. If such digital media is found
later, a watermark may be extracted from the digital media and a
distribution source may be recognized from the content of the
watermark.
[0115] Another application of invisible watermarking is a
description for digital media.
[0116] A file format for digital media may include additional
information called metadata and a digital watermark is
distinguished from metadata in that it is delivered as an AV signal
itself of digital media.
[0117] The watermarking method may include spread spectrum,
quantization, and amplitude modulation.
[0118] If a marked signal is obtained through additional editing,
the watermarking method corresponds to the spread spectrum.
Although it is known that the spread spectrum watermark is quite
strong, not much information is contained because the watermark
interferes with an embedded host signal.
[0119] If a marked signal is obtained through the quantization, the
watermarking method corresponds to a quantization type. The
quantization watermark is weak, much information may be
contained.
[0120] If a marked signal is obtained through an additional editing
method similar to the spread spectrum in a spatial domain, a
watermarking method corresponds to the amplitude modulation.
[0121] FIG. 3 is a ladder diagram illustrating a data flow in a
watermark based network topology according to an embodiment.
[0122] First, the content providing server 10 transmits a broadcast
signal including a main AV content and an enhanced service in
operation S101.
[0123] The watermark server 21 receives a broadcast signal that the
content providing server 10 provides, inserts a visible watermark
such as a logo or watermark information as an invisible watermark
into the main AV content by editing the main AV content, and
provides the watermarked main AV content and enhanced service to
the MVPD 30 in operation S103.
[0124] The watermark information inserted through an invisible
watermark may include at least one of a watermark purpose, content
information, enhanced service information, and an available
enhanced service. The watermark purpose represents one of illegal
copy prevention, viewer ratings, and enhanced service
acquisition.
[0125] The content information may include at least one of
identification information of a content provider that provides main
AV content, main AV content identification information, time
information of a content interval used in content information
acquisition, names of channels through which main AV content is
broadcasted, logos of channels through which main AV content is
broadcasted, descriptions of channels through which main AV content
is broadcasted, a usage information reporting period, the minimum
usage time for usage information acquisition, and available
enhanced service information relating to main AV content.
[0126] If the video display device 100 uses a watermark to acquire
content information, the time information of a content interval
used for content information acquisition may be the time
information of a content interval into which a watermark used is
embedded. If the video display device 100 uses a fingerprint to
acquire content information, the time information of a content
interval used for content information acquisition may be the time
information of a content interval where feature information is
extracted. The time information of a content interval used for
content information acquisition may include at least one of the
start time of a content interval used for content information
acquisition, the duration of a content interval used for content
information acquisition, and the end time of a content interval
used for content information acquisition.
[0127] The usage information reporting address may include at least
one of a main AV content watching information reporting address and
an enhanced service usage information reporting address. The usage
information reporting period may include at least one of a main AV
content watching information reporting period and an enhanced
service usage information reporting period. A minimum usage time
for usage information acquisition may include at least one of a
minimum watching time for a main AV content watching information
acquisition and a minimum usage time for enhanced service usage
information extraction.
[0128] On the basis that a main AV content is watched for more than
the minimum watching time, the video display device 100 acquires
watching information of the main AV content and reports the
acquired watching information to the main AV content watching
information reporting address in the main AV content watching
information reporting period.
[0129] On the basis that an enhanced service is used for more than
the minimum usage time, the video display device 100 acquires
enhanced service usage information and reports the acquired usage
information to the enhanced service usage information reporting
address in the enhanced service usage information reporting
period.
[0130] The enhanced service information may include at least one of
information on whether an enhanced service exists, an enhanced
service address providing server address, an acquisition path of
each available enhanced service, an address for each available
enhanced service, a start time of each available enhanced service,
an end time of each available enhanced service, a lifetime of each
available enhanced service, an acquisition mode of each available
enhanced service, a request period of each available enhanced
service, priority information each available enhanced service,
description of each available enhanced service, a category of each
available enhanced service, a usage information reporting address,
a usage information reporting period, and the minimum usage time
for usage information acquisition.
[0131] The acquisition path of available enhanced service may be
represented with IP or Advanced Television Systems
Committee-Mobile/Handheld (ATSC M/H). If the acquisition path of
available enhanced service is ATSC M/H, enhanced service
information may further include frequency information and channel
information. An acquisition mode of each available enhanced service
may represent Push or Pull.
[0132] Moreover, the watermark server 21 may insert watermark
information as an invisible watermark into the logo of a main AV
content.
[0133] For example, the watermark server 21 may insert a barcode at
a predetermined position of a logo. At this point, the
predetermined position of the logo may correspond to the first line
at the bottom of an area where the logo is displayed. The video
display device 100 may not display a barcode when receiving a main
AV content including a logo with the barcode inserted.
[0134] For example, the watermark server 21 may insert a barcode at
a predetermined position of a logo. At this point, the log may
maintain its form.
[0135] For example, the watermark server 21 may insert N-bit
watermark information at each of the logos of M frames. That is,
the watermark server 21 may insert M*N watermark information in M
frames.
[0136] The MVPD 30 receives broadcast signals including watermarked
main AV content and enhanced service and generates a multiplexed
signal to provide it to the broadcast receiving device 60 in
operation S105. At this point, the multiplexed signal may exclude
the received enhanced service or may include new enhanced
service.
[0137] The broadcast receiving device 60 tunes a channel that a
user selects and receives signals of the tuned channel, demodulates
the received signals, performs channel decoding and AV decoding on
the demodulated signals to generate an uncompressed main AV
content, and then, provides the generated uncompressed main AV
content to the video display device 100 in operation S106.
[0138] Moreover, the content providing server 10 also broadcasts a
broadcast signal including a main AV content through a wireless
channel in operation S107.
[0139] Additionally, the MVPD 30 may directly transmit a broadcast
signal including a main AV content to the video display device 100
without going through the broadcast receiving device 60 in
operation S108.
[0140] The video display device 100 may receive an uncompressed
main AV content through the broadcast receiving device 60.
Additionally, the video display device 100 may receive a broadcast
signal through a wireless channel, and then, may demodulate and
decode the received broadcast signal to obtain a main AV content.
Additionally, the video display device 100 may receive a broadcast
signal from the MVPD 30, and then, may demodulate and decode the
received broadcast signal to obtain a main AV content. The video
display device 100 extracts watermark information from some frames
or a section of audio samples of the obtained main AV content. If
watermark information corresponds to a logo, the video display
device 100 confirms a watermark server address corresponding to a
logo extracted from a corresponding relationship between a
plurality of logos and a plurality of watermark server addresses.
When the watermark information corresponds to the logo, the video
display device 100 cannot identify the main AV content only with
the logo. Additionally, when the watermark information does not
include content information, the video display device 100 cannot
identify the main AV content but the watermark information may
include content provider identifying information or a watermark
server address. When the watermark information includes the content
provider identifying information, the video display device 100 may
confirm a watermark server address corresponding to the content
provider identifying information extracted from a corresponding
relationship between a plurality of content provider identifying
information and a plurality of watermark server addresses. In this
manner, when the video display device 100 cannot identify a main AV
content the video display device 100 only with the watermark
information, it accesses the watermark server 21 corresponding to
the obtained watermark server address to transmit a first query in
operation S109.
[0141] The watermark server 21 provides a first reply to the first
query in operation S111. The first reply may include at least one
of content information, enhanced service information, and an
available enhanced service.
[0142] If the watermark information and the first reply do not
include an enhanced service address, the video display device 100
cannot obtain enhanced service. However, the watermark information
and the first reply may include an enhanced service address
providing server address. In this manner, the video display device
100 does not obtain a service address or enhanced service through
the watermark information and the first reply. If the video display
device 100 obtains an enhanced service address providing server
address, it accesses the enhanced service information providing
server 40 corresponding to the obtained enhanced service address
providing server address to transmit a second query including
content information in operation S119.
[0143] The enhanced service information providing server 40
searches at least one available enhanced service relating to the
content information of the second query. Later, the enhanced
service information providing server 40 provides to the video
display device 100 enhanced service information for at least one
available enhanced service as a second reply to the second query in
operation S121.
[0144] If the video display device 100 obtains at least one
available enhanced service address through the watermark
information, the first reply, or the second reply, it accesses the
at least one available enhanced service address to request enhanced
service in operation S123, and then, obtains the enhanced service
in operation S125.
[0145] FIG. 4 is a view illustrating a watermark based content
recognition timing according to an embodiment.
[0146] As shown in FIG. 4, when the broadcast receiving device 60
is turned on and tunes a channel, and also, the video display
device 100 receives a main AV content of the turned channel from
the broadcast receiving device 60 through an external input port
111, the video display device 100 may sense a content provider
identifier (or a broadcasting station identifier) from the
watermark of the main AV content. Then, the video display device
100 may sense content information from the watermark of the main AV
content on the basis of the sensed content provider identifier.
[0147] At this point, as shown in FIG. 4, the detection available
period of the content provider identifier may be different from
that of the content information. Especially, the detection
available period of the content provider identifier may be shorter
than that of the content information. Through this, the video
display device 100 may have an efficient configuration for
detecting only necessary information.
[0148] FIG. 5 is a block diagram illustrating a fingerprint based
network topology according to an embodiment.
[0149] As shown in FIG. 5, the network topology may further include
a fingerprint server 22.
[0150] As shown in FIG. 5, the fingerprint server 22 does not edit
a main AV content, but extracts feature information from some
frames or a section of audio samples of the main AV content and
stores the extracted feature information. Then, when receiving the
feature information from the video display device 100, the
fingerprint server 22 provides an identifier and time information
of an AV content corresponding to the received feature
information.
[0151] FIG. 6 is a ladder diagram illustrating a data flow in a
fingerprint based network topology according to an embodiment.
[0152] First, the content providing server 10 transmits a broadcast
signal including a main AV content and an enhanced service in
operation S201.
[0153] The fingerprint server 22 receives a broadcast signal that
the content providing server 10, extracts a plurality of feature
information from a plurality of frame intervals or audio intervals
of the main AV content, and establishes a database for a plurality
of query results corresponding to the plurality of feature
information in operation S203. The query result may include at
least one of content information, enhanced service information, and
an available enhanced service.
[0154] The MVPD 30 receives broadcast signals including a main AV
content and enhanced service and generates a multiplexed signal to
provide it to the broadcast receiving device 60 in operation S205.
At this point, the multiplexed signal may exclude the received
enhanced service or may include new enhanced service.
[0155] The broadcast receiving device 60 tunes a channel that a
user selects and receives signals of the tuned channel, demodulates
the received signals, performs channel decoding and AV decoding on
the demodulated signals to generate an uncompressed main AV
content, and then, provides the generated uncompressed main AV
content to the video display device 100 in operation S206.
[0156] Moreover, the content providing server 10 also broadcasts a
broadcast signal including a main AV content through a wireless
channel in operation S207.
[0157] Additionally, the MVPD 30 may directly transmit a broadcast
signal including a main AV content to the video display device 100
without going through the broadcast receiving device 60.
[0158] The video display device 100 may receive an uncompressed
main AV content through the broadcast receiving device 60.
Additionally, the video display device 100 may receive a broadcast
signal through a wireless channel, and then, may demodulate and
decode the received broadcast signal to obtain a main AV content.
Additionally, the video display device 100 may receive a broadcast
signal from the MVPD 30, and then, may demodulate and decode the
received broadcast signal to obtain a main AV content. The video
display device 100 extracts feature information from some frames or
a section of audio samples of the obtained main AV content in
operation S213.
[0159] The video display device 100 accesses the fingerprint server
22 corresponding to the predetermined fingerprint server address to
transmit a first query including the extracted feature information
in operation S215.
[0160] The fingerprint server 22 provides a query result as a first
reply to the first query in operation S217. If the first reply
corresponds to fail, the video display device 100 accesses the
fingerprint server 22 corresponding to another fingerprint server
address to transmit a first query including the extracted feature
information.
[0161] The fingerprint server 22 may provide Extensible Markup
Language (XML) document as a query result. Examples of the XML
document containing a query result will be described with reference
to FIG. 7 and Table 1.
[0162] FIG. 7 is a view illustrating an XML schema diagram of
ACR-Resulttype containing a query result according to an
embodiment.
[0163] As shown in FIG. 7, ACR-Resulttype containing a query result
includes ResultCode attributes and ContentID, NTPTimestamp,
SignalingChannelInformation, and ServiceInformation elements.
[0164] For example, if the ResultCode attribute has 200, this may
mean that the query result is successful. For example, if the
ResultCode attribute has 404, this may mean that the query result
is unsuccessful.
[0165] The SignalingChannelInformation element includes a
SignalingChannelURL, and the SignalingChannelURL element includes
an UpdateMode and PollingCycle attributes. The UpdateMode attribute
may have a Pull value or a Push value.
[0166] The ServiceInformation element includes ServiceName,
ServiceLogo, and ServiceDescription elements.
[0167] Table 1 illustrates an XML schema of ACR-ResultType
containing the query result.
TABLE-US-00001 TABLE 1 <xs:complexType name="ACR-ResultType">
<xs:sequence> <xs:element name="ContentID"
type="xs:anyURI"/> <xs:element name="NTPTimestamp"
type="xs:unsignedLong"/> <xs:element
name="SignalingChannelInformation"> <xs:complexType>
<xs:sequence> <xs:element name="SignalingChannelURL"
maxOccurs="unbounded"> <xs:complexType>
<xs:simpleContent> <xs:extension base="xs:anyURI">
<xs:attribute name="UpdateMode"> <xs:simpleType>
<xs:restriction base="xs:string"> <xs:enumeration
value="Pull"/> <xs:enumeration value="Push"/>
</xs:restriction> </xs:simpleType>
</xs:attribute> <xs:attribute name="PollingCycle"
type="xs:unsignedInt"/> </xs:extension>
</xs:simpleContent> </xs:complexType>
</xs:element> </xs:sequence> </xs:complexType>
</xs:element> <xs:element name="ServiceInformation">
<xs:complexType> <xs:sequence> <xs:element
name="ServiceName" type="xs:string"/> <xs:element
name="ServiceLogo" type="xs:anyURI" minOccurs="0"/>
<xs:element name="ServiceDescription" type="xs:string"
minOccurs="0" maxOccurs="unbounded"/> </xs:sequence>
</xs:complexType> </xs:element> <xs:any
namespace="##other" processContents="skip" minOccurs="0"
maxOccurs="unbounded"/> </xs:sequence> <xs:attribute
name="ResultCode" type="xs:string" use="required"/>
<xs:anyAttribute processContents="skip"/>
</xs:complexType>
[0168] As the ContentID element, an ATSC content identifier may be
used as shown in Table 2.
TABLE-US-00002 TABLE 2 Syntax The Number of bits format
ATSC_content_identifier( ) { TSID 16 uimsbf reserved 2 bslbf
end_of_day 5 uimsbf unique_for 9 uimsbf content_id var }
[0169] As shown in Table 2, the ATSC content identifier has a
structure including TSID and a house number.
[0170] The 16 bit unsigned integer TSID carries a transport stream
identifier.
[0171] The 5 bit unsigned integer end_of_day is set with an hour in
a day of when a content_id value can be reused after broadcasting
is finished.
[0172] The 9 bit unsigned integer unique_for is set with the number
of day of when the content_id value cannot be reused.
[0173] Content_id represents a content identifier. The video
display device 100 reduces unique_for by 1 in a corresponding time
to end_of_day daily and presumes that content_id is unique if
unique_for is not 0.
[0174] Moreover, as the ContentID element, a global service
identifier for ATSC-M/H service may be used as described below.
[0175] The global service identifier has the following form. [0176]
urn:oma:bcast:iauth:atsc:service:<region>:<xsid>:<servicei-
d>
[0177] Here, <region> is an international country code
including two characters regulated by ISO 639-2. <xsid> for
local service is a decimal number of TSID as defined in
<region>, and <xsid> (regional service) (major >69)
is "0". <serviceid> is defined with <major> or
<minor>. <major> represent a Major Channel number, and
<minor> represents a Minor Channel Number.
[0178] Examples of the global service identifier are as follows.
[0179] urn:oma:bcast:iauth:atsc:service:us:1234:5.1 [0180]
urn:oma:bcast:iauth:atsc:service:us:0:100.200
[0181] Moreover, as the ContentID element, an ATSC content
identifier may be used as described below.
[0182] The ATSC content identifier has the following form. [0183]
urn:oma:bcast:iauth:atsc:content:<region>:<xsidz>:<content-
id>:<unique_for>:<end_of_day>
[0184] Here, <region> is an international country code
including two characters regulated by ISO 639-2. <xsid> for
local service is a decimal number of TSID as defined in
<region>, and may be followed by "."<serviceid>.
<xsid> for (regional service) (major >69) is
<serviceid>. <content_id> is a base64 sign of a
content_id field defined in Table 2, <unique_for> is a
decimal number sign of an unique_for field defined in Table 2, and
<end_of_day> is a decimal number sign of an end_of_day field
defined in Table 2.
[0185] Hereinafter, FIG. 6 is described again.
[0186] If the query result does not include an enhanced service
address or enhanced service but includes an enhanced service
address providing server address, the video display device 100
accesses the enhanced service information providing server 40
corresponding to the obtained enhanced service address providing
server address to transmit a second query including content
information in operation S219.
[0187] The enhanced service information providing server 40
searches at least one available enhanced service relating to the
content information of the second query. Later, the enhanced
service information providing server 40 provides to the video
display device 100 enhanced service information for at least one
available enhanced service as a second reply to the second query in
operation S221.
[0188] If the video display device 100 obtains at least one
available enhanced service address through the first reply or the
second reply, it accesses the at least one available enhanced
service address to request enhanced service in operation S223, and
then, obtains the enhanced service in operation S225.
[0189] When the UpdateMode attribute has a Pull value, the video
display device 100 transmits an HTTP request to the enhanced
service providing server 50 through SignalingChannelURL and
receives an HTTP reply including a PSIP binary stream from the
enhanced service providing server 50 in response to the request. In
this case, the video display device 100 may transmit the HTTP
request according to a Polling period designated as the
PollingCycle attribute. Additionally, the SignalingChannelURL
element may have an update time attribute. In this case, the video
display device 100 may transmit the HTTP request according to an
update time designated as the update time attribute.
[0190] If the UpdateMode attribute has a Push value, the video
display device 100 may receive update from a server asynchronously
through XMLHTTPRequest API. After the video display device 100
transmits an asynchronous request to a server through
XMLHTTPRequest object, if there is a change of signaling
information, the server provides the signaling information as a
reply through the channel. If there is limitation in session
standby time, a server generates a session timeout reply and a
receiver recognizes the generated timeout reply to transmit a
request again, so that a signaling channel between the receiver and
the server may be maintained for all time.
[0191] FIG. 8 is a block diagram illustrating a watermark and
fingerprint based network topology according to an embodiment.
[0192] As shown in FIG. 8, the watermark and fingerprint based
network topology may further include a watermark server 21 and a
fingerprint server 22.
[0193] As shown in FIG. 8, the watermark server 21 inserts content
provider identifying information into a main AV content. The
watermark server 21 may insert content provider identifying
information as a visible watermark such as a logo or an invisible
watermark into a main AV content.
[0194] The fingerprint server 22 does not edit a main AV content,
but extracts feature information from some frames or a section of
audio samples of the main AV content and stores the extracted
feature information. Then, when receiving the feature information
from the video display device 100, the fingerprint server 22
provides an identifier and time information of an AV content
corresponding to the received feature information.
[0195] FIG. 9 is a ladder diagram illustrating a data flow in a
watermark and fingerprint based network topology according to an
embodiment.
[0196] First, the content providing server 10 transmits a broadcast
signal including a main AV content and an enhanced service in
operation S301.
[0197] The watermark server 21 receives a broadcast signal that the
content providing server 10 provides, inserts a visible watermark
such as a logo or watermark information as an invisible watermark
into the main AV content by editing the main AV content, and
provides the watermarked main AV content and enhanced service to
the MVPD 30 in operation S303. The watermark information inserted
through an invisible watermark may include at least one of content
information, enhanced service information, and an available
enhanced service. The content information and enhanced service
information are described above.
[0198] The MVPD 30 receives broadcast signals including watermarked
main AV content and enhanced service and generates a multiplexed
signal to provide it to the broadcast receiving device 60 in
operation S305. At this point, the multiplexed signal may exclude
the received enhanced service or may include new enhanced
service.
[0199] The broadcast receiving device 60 tunes a channel that a
user selects and receives signals of the tuned channel, demodulates
the received signals, performs channel decoding and AV decoding on
the demodulated signals to generate an uncompressed main AV
content, and then, provides the generated uncompressed main AV
content to the video display device 100 in operation S306.
[0200] Moreover, the content providing server 10 also broadcasts a
broadcast signal including a main AV content through a wireless
channel in operation S307.
[0201] Additionally, the MVPD 30 may directly transmit a broadcast
signal including a main AV content to the video display device 100
without going through the broadcast receiving device 60 in
operation S308.
[0202] The video display device 100 may receive an uncompressed
main AV content through the broadcast receiving device 60.
Additionally, the video display device 100 may receive a broadcast
signal through a wireless channel, and then, may demodulate and
decode the received broadcast signal to obtain a main AV content.
Additionally, the video display device 100 may receive a broadcast
signal from the MVPD 30, and then, may demodulate and decode the
received broadcast signal to obtain a main AV content. The video
display device 100 extracts watermark information from some frames
or a section of audio samples of the obtained main AV content. If
watermark information corresponds to a logo, the video display
device 100 confirms a watermark server address corresponding to a
logo extracted from a corresponding relationship between a
plurality of logos and a plurality of watermark server addresses.
When the watermark information corresponds to the logo, the video
display device 100 cannot identify the main AV content only with
the logo. Additionally, when the watermark information does not
include content information, the video display device 100 cannot
identify the main AV content but the watermark information may
include content provider identifying information or a watermark
server address. When the watermark information includes the content
provider identifying information, the video display device 100 may
confirm a watermark server address corresponding to the content
provider identifying information extracted from a corresponding
relationship between a plurality of content provider identifying
information and a plurality of watermark server addresses. In this
manner, when the video display device 100 cannot identify a main AV
content the video display device 100 only with the watermark
information, it accesses the watermark server 21 corresponding to
the obtained watermark server address to transmit a first query in
operation S309.
[0203] The watermark server 21 provides a first reply to the first
query in operation S311. The first reply may include at least one
of a fingerprint server address, content information, enhanced
service information, and an available enhanced service. The content
information and enhanced service information are described
above.
[0204] If the watermark information and the first reply include a
fingerprint server address, the video display device 100 extracts
feature information from some frames or a section of audio samples
of the obtained main AV content in operation S313.
[0205] The video display device 100 accesses the fingerprint server
22 corresponding to the fingerprint server address in the first
reply to transmit a second query including the extracted feature
information in operation S315.
[0206] The fingerprint server 22 provides a query result as a
second reply to the second query in operation S317.
[0207] If the query result does not include an enhanced service
address or enhanced service but includes an enhanced service
address providing server address, the video display device 100
accesses the enhanced service information providing server 40
corresponding to the obtained enhanced service address providing
server address to transmit a third query including content
information in operation S319.
[0208] The enhanced service information providing server 40
searches at least one available enhanced service relating to the
content information of the third query. Later, the enhanced service
information providing server 40 provides to the video display
device 100 enhanced service information for at least one available
enhanced service as a third reply to the third query in operation
S321.
[0209] If the video display device 100 obtains at least one
available enhanced service address through the first reply, the
second reply, or the third reply, it accesses the at least one
available enhanced service address to request enhanced service in
operation S323, and then, obtains the enhanced service in operation
S325.
[0210] Then, referring to FIGS. 10 and 18, the video display device
100 will be described according to an embodiment.
[0211] FIG. 10 is a block diagram illustrating the video display
device according to the embodiment.
[0212] As shown in FIG. 10, the video display device 100 includes a
broadcast signal receiving unit 101, a demodulation unit 103, a
channel decoding unit 105, a demultiplexing unit 107, an AV
decoding unit 109, an external input port 111, a play controlling
unit 113, a play device 120, an enhanced service management unit
130, a data transmitting/receiving unit 141, and a memory 150.
[0213] The broadcast signal receiving unit 101 receives a broadcast
signal from the content providing server 10 or MVPD 30.
[0214] The demodulation unit 103 demodulates the received broadcast
signal to generate a demodulated signal.
[0215] The channel decoding unit 105 performs channel decoding on
the demodulated signal to generate channel-decoded data.
[0216] The demultiplexing unit 107 separates a main AV content and
enhanced service from the channel-decoded data. The separated
enhanced service is stored in an enhanced service storage unit
152.
[0217] The AV decoding unit 109 performs AV decoding on the
separated main AV content to generate an uncompressed main AV
content.
[0218] Moreover, the external input port 111 receives an
uncompressed main AV content from the broadcast receiving device
60, a digital versatile disk (DVD) player, a Blu-ray disk player,
and so on. The external input port 111 may include at least one of
a DSUB port, a High Definition Multimedia Interface (HDMI) port, a
Digital Visual Interface (DVI) port, a composite port, a component
port, and an S-Video port.
[0219] The play controlling unit 113 controls the play device 120
to play at least one of an uncompressed main AV content that the AV
decoding unit 109 generates and an uncompressed main AV content
received from the external input port 111 according to a user's
selection.
[0220] The play device 120 includes a display unit 121 and a
speaker 123. The display unit 21 may include at least one of a
liquid crystal display (LCD), a thin film transistor-liquid crystal
display (TFT LCD), an organic light-emitting diode (OLED), a
flexible display, and a 3D display.
[0221] The enhanced service management unit 130 obtains content
information of the main AV content and obtains available enhanced
service on the basis of the obtained content information.
Especially, as described above, the enhanced service management
unit 130 may obtain the identification information of the main AV
content on the basis of some frames or a section of audio samples
of the uncompressed main AV content. This is called automatic
contents recognition (ACR) in this specification.
[0222] The data transmitting/receiving unit 141 may include an
Advanced Television Systems Committee-Mobile/Handheld (ATSC-M/H)
channel transmitting/receiving unit 141a and an IP
transmitting/receiving unit 141b.
[0223] The memory 150 may include at least one type of storage
medium such as a flash memory type, a hard disk type, a multimedia
card micro type, a card type memory such as SD or XD memory, Random
Access Memory (RAM), Static Random Access Memory (SRAM), Read-Only
Memory (ROM), Electrically Erasable Programmable Read-Only Memory
(EEPROM), Programmable Read-Only Memory (PROM), magnetic memory,
magnetic disk, and optical disk. The video display device 100 may
operate in linkage with a web storage performing a storage function
of the memory 150 in the Internet.
[0224] The memory 150 may include a content information storage
unit 151, an enhanced service storage unit 152, a logo storage unit
153, a setting information storage unit 154, a bookmark storage
unit 155, a user information storage unit 156, and a usage
information storage unit 157.
[0225] The content information storage unit 151 stores a plurality
of content information corresponding to a plurality of feature
information.
[0226] The enhanced service storage unit 152 may store a plurality
of enhanced services corresponding to a plurality of feature
information or a plurality of enhanced services corresponding to a
plurality of content information.
[0227] The logo storage unit 153 stores a plurality of logos.
Additionally, the logo storage unit 153 may further store content
provider identifiers corresponding to the plurality of logos or
watermark server addresses corresponding to the plurality of
logos.
[0228] The setting information storage unit 154 stores setting
information for ACR.
[0229] The bookmark storage unit 155 stores a plurality of
bookmarks.
[0230] The user information storage unit 156 stores user
information. The user information may include at least one of at
least one account information for at least one service, regional
information, family member information, preferred genre
information, video display device information, and a usage
information range. The at least one account information may include
account information for a usage information measuring server and
account information of social network service such as Twitter and
Facebook. The regional information may include address information
and zip codes. The family member information may include the number
of family members, each member's age, each member's sex, each
member's religion, and each member's job. The preferred genre
information may be set with at least one of sports, movie, drama,
education, news, entertainment, and other genres. The video display
device information may include information such as the type,
manufacturer, firmware version, resolution, model, OS, browser,
storage device availability, storage device capacity, and network
speed of a video display device. Once the usage information range
is set, the video display device 100 collects and reports main AV
content watching information and enhanced service usage information
within the set range. The usage information range may be set in
each virtual channel. Additionally, the usage information
measurement allowable range may be set over an entire physical
channel.
[0231] The usage information providing unit 157 stores the main AV
content watching information and the enhanced service usage
information, which are collected by the video display device 100.
Additionally, the video display device 100 analyzes a service usage
pattern on the basis of the collected main AV content watching
information and enhanced service usage information, and stores the
analyzed service usage pattern in the usage information storage
unit 157.
[0232] The enhanced service management unit 130 may obtain the
content information of the main AV content from the fingerprint
server 22 or the content information storage unit 151. If there is
no content information or sufficient content information, which
corresponds to the extracted feature information, in the content
information storage unit 151, the enhanced service management unit
130 may receive additional content information through the data
transmitting/receiving unit 141. Moreover, the enhanced service
management unit 130 may update the content information
continuously.
[0233] The enhanced service management unit 130 may obtain
available enhanced service from the enhanced service providing
server 50 or the enhanced service storage unit 153. If there is no
enhanced service or sufficient enhanced service in the enhanced
service storage unit 153, the enhanced service management unit 130
may update enhanced service through the data transmitting/receiving
unit 141. Moreover, the enhanced service management unit 130 may
update the enhanced service continuously.
[0234] The enhanced service management unit 130 may extracts a logo
from the main AV content, and then, may make a query to the logo
storage unit 155 to obtain a content provider identifier or
watermark server address, which is corresponds to the extracted
logo. If there is no logo or a sufficient logo, which corresponds
to the extracted logo, in the logo storage unit 155, the enhanced
service management unit 130 may receive an additional logo through
the data transmitting/receiving unit 141. Moreover, the enhanced
service management unit 130 may update the logo continuously.
[0235] The enhanced service management unit 130 may compare the
logo extracted from the main AV content with the plurality of logos
in the logo storage unit 155 through various methods. The various
methods may reduce the load of the comparison operation.
[0236] For example, the enhanced service management unit 130 may
perform the comparison on the basis of color characteristics. That
is, the enhanced service management unit 130 may compare the color
characteristic of the extracted logo with the color characteristics
of the logos in the logo storage unit 155 to determine whether they
are identical or not.
[0237] Moreover, the enhanced service management unit 130 may
perform the comparison on the basis of character recognition. That
is, the enhanced service management unit 130 may compare the
character recognized from the extracted logo with the characters
recognized from the logos in the logo storage unit 155 to determine
whether they are identical or not.
[0238] Furthermore, the enhanced service management unit 130 may
perform the comparison on the basis of the contour of the logo.
That is, the enhanced service management unit 130 may compare the
contour of the extracted logo with the contours of the logos in the
logo storage unit 155 to determine whether they are identical or
not.
[0239] Hereinafter, referring to FIGS. 11 and 18, the enhanced
service management unit 130 will be described according to various
embodiments.
[0240] FIG. 11 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0241] As shown in FIG. 11, the enhanced service management unit
130 may include an operating system 131a, an audio driver 132a, a
video driver 133a, a network driver 134a, an ACR platform
application program interface (API) 135a, at least one ACR engine
136a, an ACR daemon 137a, an ACR middleware 138a, and at least one
ACR application 139a.
[0242] When the enhanced service management unit 130 is used as
shown in FIG. 11, a user doesn't need to necessarily recognize a
channel or content and an ACR operation may be performed
always.
[0243] The enhanced service management unit 130 may access an
application store through the data transmitting/receiving unit 141
to download application.
[0244] The audio driver 132a may access an audio buffer used for
audio fingerprint or audio watermark.
[0245] The video driver 133a may access a video buffer used for
video fingerprint or video watermark.
[0246] The network driver 134a allows the ACR engine 136a to access
the data transmitting/receiving unit 141.
[0247] The platform API 135a provides API to allow the ACR engine
136a to access the audio driver 132a, the video driver 133a, and
the network driver 134a.
[0248] Since a plurality of broadcasting stations or content
providers use respectively different content recognizing services,
the video display device 100 may include a plurality of ACR engines
136a. That is, the video display device 100 may include an ACR
engine for at least one of a plurality of video watermark
extraction algorithms, a plurality of audio watermark extraction
algorithms, a plurality of video signature extraction algorithms,
and a plurality of audio signature extraction algorithms. The
watermark based ACR engine 136a may extract watermark information,
and then, may obtain at least one of a watermark purpose, content
information, enhanced service information, and an available
enhanced service from the extracted watermark information. The
fingerprint based ACR engine 136a may extract feature information
in some intervals of a main AV content, and then, may obtain at
least one of content information, enhanced service information, and
an available enhanced service on the basis of the extracted feature
information.
[0249] The ACR daemon 137a manages at least one ACR engine 136a.
The daemon is executed continuously to process a periodic service
request. The daemon appropriately delivers the collected requests
to allow another program to process them. The ACR daemon 137a may
manage the execution and termination of the ACR engine 136a. The
ACR daemon 137a searches an ACR engine matching to a current main
AV content among a plurality of ACR engines 136a. Especially, if a
system resource is consumed greatly because several ACR engines are
executed, the ACR daemon 137a sequentially executes the plurality
of ACR engines 136a one by one according to a specific rule or
priority to confirm whether content recognition is successful.
Additionally, if one of the plurality of ACR engines 136a is
successful in content recognition, the ACR daemon 137a obtains and
executes an ACR application 139a corresponding to an enhanced
service for the recognized content. While the ACR engine 136a
performs the content recognition successfully, if contents are not
recognized any more due to a channel change, the ACR daemon 137a
may terminate the ACR application 139a.
[0250] The ACR middleware 138a serves as a browser for at least one
ACR application 139a.
[0251] The ACR application 139a may provide user experience
enhanced by ACR to a user. The ACR application 139a may be an
application downloaded from an application store or the Internet or
may be a simple Uniform Resource Locator (URL). The ACR application
139a may provide content target advertisement, a content provider
portal service, a program specific service such as electronic
program guide (EPG), or a content provider specific service. While
the ACR application 139a interact with the ACR engine 136a through
the ACR application, it receives content information or signature
from the ACR engine 136a and additionally obtains an enhanced
service corresponding to the content information or signature to
play them in the play device 120. For this, an ACR application
interface that the ACR application 139a uses is shown in Table 3
below.
TABLE-US-00003 TABLE 3 Name description Method String getContentID(
) Return recognized content id, or undefined if content has not
been recognized. Date getTiming( ) Return time stamp, or undefined
if content has not been recognized or time stamp is unavailable.
String getSignature( ) Return the signature captured, or undefined
if capturing of the signature has failed.
[0252] FIG. 12 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0253] When the broadcast receiving device 60 and the video display
device 100 are turned on and the external input port 111 of the
video display device 100 is selected, the ACR daemon 137a obtains
the content information of a main AV content broadcasted in a tuned
channel through at least one ACR engine 136a in operation S401.
[0254] Then, the ACR daemon 137a obtains an available enhanced
service relating to the content information in operation S403.
[0255] The ACR daemon 137a executes the obtained enhanced service
in background in operation S405.
[0256] The ACR daemon 137a displays a color button on the display
unit 121 to notify a user that enhanced service is available in
operation S407.
[0257] When the ACR daemon 137a receives the use of the enhanced
service, it plays the enhanced service executed in background in
the play device 120 in operation S409.
[0258] If a change or main AV content is changed, the ACR daemon
137a recognizes a change through at least one ACR engine 136a and
terminates the enhanced service in operation S411.
[0259] FIG. 13 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0260] As shown in FIG. 13, the enhanced service management unit
130 may include an operating system 131b, an audio driver 132b, a
video driver 133b, a network driver 134b, an ACR platform
application program interface (API) 135b, at least one ACR engine
136b, an ACR engine management unit 137b, an ACR middleware 138b,
and at least one ACR application 139b.
[0261] When the enhanced service management unit 130 is used as
shown in FIG. 13, a user may need to necessarily recognize a
channel or content. However, since the number of queries for ACR
may be reduced, server overhead may be decreased.
[0262] The audio driver 132b, the video driver 133b, the network
driver 134b, the ACR platform API 135b, the at least one ACR engine
136b, and the ACR middleware 138b in the enhanced service
management unit 130 of FIG. 13 are identical or similar to those
132a, 133a, 134a, 135a, 136a, and 138a in the enhanced service
management unit 130 FIG. 11. Therefore, their detailed descriptions
will be omitted.
[0263] The ACR engine management unit 137b manages a list of at
least one ACR engine 136b and provides a selection interface of the
ACR engine 136b to the ACR application 139b.
[0264] The ACR application 139b may provide user experience
enhanced by ACR to a user. The ACR application 139b may be an
application downloaded from an application store or the Internet or
may be a simple Uniform Resource Locator (URL). The ACR application
139b may provide content target advertisement, a content provider
portal service, a program specific service such as electronic
program guide (EPG), or a content provider specific service.
[0265] While the ACR application 139b interacts with the ACR engine
management unit 137b through the ACR application interface of the
ACR middleware 138b, it may select the ACR engine 136b to be used.
For this, the ACR application interface that the ACR application
139b uses is shown in Table 4 and Table 5 below.
TABLE-US-00004 TABLE 4 Name description Property readonly
ACRCollection List of ACR engines installed acrCollection in the
Receiver Method ACR getACR(String acrId) Return an ACR object
matched with ACR Id, or undefined if no item matched is found. The
argument acrid means the unique identifier of the ACR
engine/solution. ACRCollection Return the whole set of ACR
getAllACR( ) objects installed in the Receiver, or undefined if no
ACR is present at the Receiver.
TABLE-US-00005 TABLE 5 Name description Property readonly Integer
length The number of ACR engines in the collection Method ACR
item(Integer index) Return the ACR object at position index in the
collection, or undefined if no item is present at that position.
The argument index means the index of the item that shall be
returned.
[0266] While the ACR application 139b interacts with the ACR engine
136b through the ACR application interface of the ACR middleware
138b, it controls the ACR engine 136b, and receives content
information or signature from the ACR engine 136b to additionally
obtain an enhanced service corresponding to the content information
or signature. Then, the ACR application 139b plays them in the play
device 120. For this, the ACR application interface that the ACR
application 139b uses is shown in Table 6 below.
TABLE-US-00006 TABLE 6 Name description Property readonly String
acrId the unique id of the ACR engine readonly String name short
name of ACR engine readonly String description Description of ACR
engine readonly Integer acrType FP or WM readonly Integer
components used for ACR acrComponent (audio, video and both)
readonly String content Id for WM readonly Date timing for WM
function onSignatureCaptured(String signature) Constant
ACR_FINGERPRINT = 1 ACR done by fingerprint technology
ACR_WATERMARK = 2 ACR done by watermark technology ACR_AUDIO = 1
Audio component is used for the content recognition. ACR_VIDEO = 2
Video component is used for the content recognition.
ACR_AUDIO_VIDEO = 3 Both audio/video components are used. Method
Boolean Initialize( ) Initialize the ACR object. Boolean Finalize(
) Destroy the ACR object. Boolean startACR( ) Start ACR engine in
order to get ready to content recognition. Boolean stopACR( ) Stop
the ACR engine. Boolean getSignature( ) for FP String getContentId(
) for WM String getTiming( ) for WM String getALSURL( ) for WM
Boolean setAudioAlgorithm (Integer audioNumCh, Interget
audioSampleRate, Integer audioNumSamples, Integer
audioBitPerSample) Boolean setVideoAlgorithm (Integer
videoNumFrames, RECT screenRect)
[0267] Thus, one example of a fingerprint sample code of a content
provider related application using such an ACR application
interface is shown in Table 7.
TABLE-US-00007 TABLE 7 <HEAD> <title>NBCU
app</title> <meta name="acr "
content="zeitera-fp-audio"/> <meta name="appAttribute"
content="CP"/> <object type="application/x-acr" id="ACRSol" /
> <object type="application/x-acrfactory" id="ACRFac" / >
<script type="text/javascript"> var aspfpURL=
"www.zeitera.com/fp-audio"; var acrSol = get ElementbyID(ACRSol);
var acrFac = get ElementbyID(ACRFac);
acrSol=acrFac.getACR("zeitera-fp-audio"); if(acrSol == null)
return; acrSol.Initialize( ); while ( ) { // for FP var signature =
acrSol.getSignature( ); if (signature == null) continue; var res =
sendRequest(aspfpURL, signature); // 1st query if
(res.contentID.substring(0, 3) == "NBCU" ) { // CP matching success
var res2 = sendRequest(res.alsURL); // 2nd query if (res2.asURL) {
// launch specific app application with this appURL } } }
</script> </HEAD> <BODY> ... </BODY>
[0268] Thus, one example of a fingerprint sample code of a content
provider related application using such an ACR application
interface is shown in Table 8.
TABLE-US-00008 TABLE 8 <HEAD> <title>NBCU Heros
app</title> <meta name="acr "
content="zeitera-fp-audio"/> <meta name="appAttribute"
content="Program"/> <object type="application/x-acr"
id="ACRSol" / > <object type="application/x-acrfactory"
id="ACRFac" / > <script type="text/javascript"> var
aspfpURL= "www.zeitera.com/fp-audio"; var acrSol = get
ElementbyID(ACRSol); var acrFac = get ElementbyID(ACRFac);
acrSol=acrFac.getACR("zeitera-fp-audio"); if(acrSol == null)
return; acrSol.Initialize( ); while ( ) { // for FP var signature =
acrSol.getSignature( ); if (signature == null) continue; var res =
sendRequest(aspfpURL, signature); // 1st query if
(res.contentID.substring(0, 9) == "NBCU-Heros" ) { // Program
matching success var res2 = sendRequest(res.alsURL, res.contentID,
res.timing); // 2nd query if (res2.asURL) { // launch specific app
application with this appURL } } } </script> </HEAD>
<BODY> </BODY>
[0269] Thus, one example of a watermarking sample code of a content
provider related application using such an ACR application
interface is shown in Table 9.
TABLE-US-00009 TABLE 9 <HEAD> <title>NBCU
app</title> <meta name="acr "
content="nielsen-wm-audio"/> <meta name="appAttribute"
content="CP"/> <object type="application/x-acr" id="ACRSol" /
> <object type="application/x-acrfactory" id="ACRFac" / >
<script type="text/javascript"> var aspfpURL=
"www.nielsen.com/wm-audio"; var acrSol = get ElementbyID(ACRSol);
var acrFac = get ElementbyID(ACRFac);
acrSol=acrFac.getACR("nielsen-wm-audio"); if(acrSol == null)
return; acrSol.Initialize( ); while ( ) { // for WM var contentId =
acrSol.getContentId( ); if (contentId == null) continue; var alsURL
= acrSol.getALSURL( ); if (contentId.substring(0, 3) == "NBCU" ) {
// CP matching success var res = sendRequest(alsURL); // 2nd query
if (res.asURL) { // launch specific app application with this
appURL } } } </script> </HEAD> <BODY> ...
</BODY>
[0270] Thus, one example of a watermarking sample code of a content
provider related application using such an ACR application
interface is shown in Table 10.
TABLE-US-00010 TABLE 10 <HEAD> <title>NBCU Heros
app</title> <meta name="acr "
content="nielsen-wm-audio"/> <meta name="appAttribute"
content="Program"/> <object type="application/x-acr"
id="ACRSol" / > <object type="application/x-acrfactory"
id="ACRFac" / > <script type="text/javascript"> var
aspfpURL= "www.nielsen.com/wm-audio"; var acrSol = get
ElementbyID(ACRSol); var acrFac = get ElementbyID(ACRFac);
acrSol=acrFac.getACR("nielsen-wm-audio"); if(acrSol == null)
return; acrSol.Initialize( ); while ( ) { // for WM var contentId =
acrSol.getContentId( ); if (contentId == null) continue; var timing
= acrSol.getTiming( ); var alsURL = acrSol.getALSURL( ); if
(contentId.substring(0, 9) == "NBCU-Heros" ) { // Program matching
success var res = sendRequest(alsURL, contentId, timing); // 2nd
query if (res.asURL) { // launch specific app application with this
appURL } } } </script> </HEAD> <BODY> ...
</BODY>
[0271] FIG. 14 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0272] Although the broadcast receiving device 60 and the video
display device 100 are turned on and the external input port 111 of
the video display device 100 is selected, the video display device
100 may not perform automatic content recognition before the ACR
application 139b is executed.
[0273] Once the corresponding channel related ACR application 139b
is executed by a user recognizing a channel of a main AV content,
the ACR application 139b queries and information on the ACR engine
136b that it uses to the ACR engine management unit 137b and
receives it in operation S501.
[0274] Then, the ACR application 139b starts the ACR engine 136b
that it uses in operation S503 and obtains content information
through the ACR engine 136b in operation S505.
[0275] The ACR application 139b obtains an available enhanced
service relating to a main AV content through the obtained content
information in operation S507, and displays a color button on the
display unit 121 to notify a user that an enhanced service is
available in operation S509.
[0276] When the ACR application 139b receives the use of the
enhanced service, it plays the enhanced service in the play device
120 in operation S511.
[0277] When the ACR middleware 138b receives a user input relating
to the termination of the ACR application 139b, it terminates the
ACR application 139b in operation S513.
[0278] FIG. 15 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0279] As shown in FIG. 15, the enhanced service management unit
130 may include an operating system 131c, an audio driver 132c, a
video driver 133c, a network driver 134c, an ACR platform API 135c,
an ACR engine 136c, an ACR middleware 138c, and at least one ACR
application 139c.
[0280] When the enhanced service management unit 130 is used as
shown in FIG. 15, a user may need to necessarily recognize a
channel or content. However, since the number of queries for ACR
may be reduced, server overhead may be decreased.
[0281] The audio driver 132c, the video driver 133c, the network
driver 134c, the ACR platform API 135c, and the ACR middleware 138c
in the enhanced service management unit 130 of FIG. 15 are
identical or similar to those 132a, 133a, 134a, 135a, and 138a in
the enhanced service management unit 130 FIG. 11. Therefore, their
detailed descriptions will be omitted.
[0282] The ACR engine 136c extracts feature information from some
frames or a section of audio samples of a main AV content to
transmit a query including the extracted feature information to an
ACR adjustment server (not shown). The ACR adjustment server may
transmit a fingerprint server address in response to the query.
Additionally, the ACR adjustment server may transmit content
information corresponding to the feature information together with
the fingerprint server address.
[0283] When receiving the fingerprint server address from the ACR
engine 136c, the ACR application 139c directly transmit a query,
which includes the feature information that the ACR engine 136c
extracts, to the fingerprint server corresponding to the
fingerprint server address. For this, the ACR application interface
that the ACR application 139c uses is shown in Table 11 below.
TABLE-US-00011 TABLE 11 Name Description Property Readonly String
For fingerprint, signature function (String For fingerprint,
signature) function pointer: pointed onSignatureCaptured function
will return signature value from lower ACREngine, event driven
Method Boolean getSignature( ) For fingerprint, asynchronous call
to get signature, will use onSignatureCaptured Boolean
getContentID( ) For watermark, Return recognized content id, or
undefined if content has not been recognized. Boolean when
getSignature fails several resetACREngine( ) times(ch change), app
will give control to ACREngine to query back to ACRCoordinator.
String getACRBackend( ) Return ACRBackend URL
[0284] Thus, one example of a fingerprint sample code using such an
ACR application interface is shown in Table 12.
TABLE-US-00012 TABLE 12 <HEAD> <title>CP
app</title> <object type="application/x-acr" id="ACRSol" /
> <script type="text/javascript"> var acrSol = get
ElementbyID(ACRSol); acrSol.onSignatureCaptured = returnSignature;
var acrBE = acrSol.getACRBackend( ); function doACR( ) {
acrSol.getSignature( ); setTimer("acrTimeout", 1000); } function
acrTimeout( ) { timeout++; if(timeout > 3)
acrSol.resetACREngine( ); } function returnSignature(signature) {
timeout = 0; doSpecificJob(signature); } function
doSpecificJob(signature) { //do specific work regarding this time }
</script> </HEAD> <BODY onload="doACR( )"> ...
</BODY>
[0285] FIG. 16 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0286] When the broadcast receiving device 60 and the video display
device 100 are turned on and the external input port 111 of the
video display device 100 is selected, the ACR engine 136c extracts
feature information from some frames or a section of audio samples
of to transmit a query including the extracted feature information
to an ACR adjustment server (not shown) in operation S601.
[0287] The ACR engine 136c receives a fingerprint server address in
response to the query in operation S603.
[0288] The ACR application 139c obtains the fingerprint server
address from the ACR engine 136c through a getACRBackend( )
method.
[0289] The ACR application 139c obtains feature information of some
video frames or audio intervals of a main AV content from the ACR
engine 136c through a getSignature( )method in operation S607.
[0290] The ACR application 139c transmits a query, which includes
the obtained feature information, to a fingerprint server
corresponding to the obtained fingerprint server address in
operation S609.
[0291] The ACR application 139c receives content information in
response to the query in operation S611.
[0292] The ACR application 139c obtains an available enhanced
service on the basis of the obtained content information in
operation S613, and displays a color button on the display unit 121
to notify a user that an enhanced service is available in operation
S615.
[0293] When the ACR application 139c receives the use of the
enhanced service, it plays the enhanced service in the play device
120 in operation S617.
[0294] When the ACR middleware 138c receives a user input relating
to the termination of the ACR application 139c, it terminates the
ACR application 139c in operation S619.
[0295] FIG. 17 is a hierarchy diagram of an enhanced service
management unit according to an embodiment.
[0296] As shown in FIG. 17, the enhanced service management unit
130 may include an operating system 131d, an audio driver 132d, a
video driver 133d, a network driver 134d, an ACR platform API 135d,
at least one ACR engine 136d, an ACR engine management unit 137d,
an application management unit 138d, and at least one ACR
application 139d.
[0297] When the enhanced service management unit 130 is used as
shown in FIG. 17, a user doesn't need to necessarily recognize a
channel or content and an ACR operation may be performed
always.
[0298] The audio driver 132d, the video driver 133d, the network
driver 134d, the ACR platform API 135d, and the plurality of ACR
engines 136d in the enhanced service management unit 130 of FIG. 17
are identical or similar to those 132a, 133a, 134a, 135a, and 136a
in the enhanced service management unit 130 FIG. 11. Therefore,
their detailed descriptions will be omitted.
[0299] The ACR engine management unit 137d confirms that the ACR
engine 136d matches to the main AV content received from the
external input port 111 and confirms that the ACR engine 136d
matches to the application 139d. At this point, the ACR engine
management unit 137d controls the plurality of ACR engines 136d to
simultaneously or sequentially perform watermark extraction or
query transmission. The ACR engine management unit 137d controls
the plurality of ACR engines 136d through priority. If one of the
plurality of ACR engines 136d is successful in recognizing a main
AV content, the ACR engine management unit 137d puts the remaining
ACR engines in sleep mode and obtains the content information of
the main AV content from the operating ACR engine.
[0300] While the application management unit 138d interacts with
the ACR engine management unit 137d, it controls generation, start,
stop, sleep, and termination of the ACR application.
[0301] The ACR application 139d may be a built-in application. The
ACR application 139d may control the ACR engine 136b through
functions shown in Table 13.
TABLE-US-00013 TABLE 13 Name Function char *getContentID( ) calls
Date getTiming( ) char *getSignature( ) Boolean
registerEventListener(EvtType evtType, Boolean
(*eventListener)(EvtType evtType, char *contentId, Date *timing,
char *signature)); Data struct Date { Structure int year; int
month; int day; int hour; int minute; int second; int msecond; };
typedef enum EvtType { EVT_PROGRAM_CHANGED, EVT_CHANNEL_CHANGED,
EVT_ALL };
[0302] FIG. 18 is a flowchart illustrating an operation of an
enhanced service management unit according to an embodiment.
[0303] When the broadcast receiving device 60 and the video display
device 100 are turned on and the external input port 111 of the
video display device 100 is selected, the ACR engine management
unit 137d confirms that the ACR engine 136a matches to the main AV
content received from the external input port 111 in operation
S701. At this point, the ACR engine management unit 137d controls
the plurality of ACR engines 136d to simultaneously or sequentially
perform watermark extraction or query transmission. The ACR engine
management unit 137d controls the plurality of ACR engines 136d
through priority.
[0304] If one of the plurality of ACR engines 136d is successful in
recognizing a main AV content, the ACR engine management unit 137d
puts the remaining ACR engines in sleep mode in operation S702, and
obtains the content information of the main AV content from the
operating ACR engine in operation S703.
[0305] Then, the ACR engine management unit 137d confirms an
available application relating to content information in operation
S704, and requests the execution of the confirmed application 139d
to the application management unit 138d.
[0306] The application management unit 138d executes the confirmed
application 139d in background in operation S705.
[0307] The application 139d executed in background displays a color
button on the display unit 121 to notify a user that enhanced
service is available in operation S707.
[0308] When the application 139d executed in background receives
the use of the enhanced service from a user, it plays the enhanced
service in the play device 120 in operation S709.
[0309] If a channel or main AV content is changed in operation
S710, the ACR engine management unit 137d confirms the ACR engine
136a matching to the application 139d and connects the confirmed
ACR engine 136a to the application 139d in operation S711. At this
point, the ACR engine management unit 137d controls the plurality
of ACR engines 136d to simultaneously or sequentially perform
watermark extraction or query transmission.
[0310] If the application management unit 138d receives a user
input for the termination of the application 139d in operation
S712, it terminates the application 139d in operation S713.
[0311] Then, referring to FIGS. 19 and 20, a method of
synchronizing a play time of a main AV content with a play time of
an enhanced service according to an embodiment will be
described.
[0312] Then, referring to FIGS. 19 and 20, a method of
synchronizing a play time of a main AV content with a play time of
an enhanced service according to an embodiment will be
described.
[0313] Enhanced service information may include a start time of an
enhanced service. At this point, the video display device 100 may
need to start the enhanced service at the start time. However,
since the video display device 100 receives a signal transmitting
an uncompressed main AV content with no time stamp, the reference
time of a plying time of the main AV content is different from that
of a start time of the enhanced service. Although the video display
device 100 receives a main AV content having time information, the
reference time of a plying time of the main AV content may be
different from that of a start time of the enhanced service, like
rebroadcasting. Accordingly, the video display device 100 may need
to synchronize the reference time of the main AV content with that
of the enhanced service. Especially, the video display device 100
may need to synchronize the play time of the main AV content with
the start time of the enhanced service.
[0314] First, the enhanced service management unit 130 extracts
some intervals of a main AV content in operation S801. The some
intervals of the main AV content may include at least one of some
video frames or audio intervals of the main AV content. Time that
the enhanced service management unit 130 extracts some intervals of
the main AV content is designated as Tn.
[0315] The enhanced service management unit 130 obtains content
information of a main AV content on the basis of the extracted
interval. In more detail, the enhanced service management unit 130
decodes information encoded with invisible watermark in the
extracted intervals to obtain content information. Additionally,
the enhanced service management unit 130 may extract feature
information in the extracted interval, and obtain the content
information of the main AV content from the fingerprint server 22
or the content information storage unit 151 on the basis of the
extracted feature information. Time that the enhanced service
management unit 130 obtains the content information is designated
as Tm.
[0316] Moreover, the content information includes a start time Ts
of the extracted interval. After the content information
acquisition time Tm, the enhanced service management unit 130
synchronizes the play time of the main AV content with the start
time of the enhanced service on the biases of Ts, Tm, and Tn. In
more detail, the enhanced service management unit 130 regards the
content information acquisition time Tm as a time Tp calculated by
the following Equation 1.
Tp=Ts+(Tm-Tn) [Equation 1]
[0317] Additionally, the enhanced service management unit 130
regards a time of when Tx elapses after the content information
acquisition time as Tp+Tx.
[0318] Then, the enhanced service management unit 130 obtains an
enhanced service and its start time Ta on the obtained content
information in operation S807.
[0319] If the synchronized play time of the main AV content is
identical to the start time Ta of the enhanced service, the
enhanced service management unit 130 starts the obtained enhanced
service in operation S809. In more detail, the enhanced service
management unit 130 may start the enhanced service when the
following Equation 2 is satisfied.
Tp+Tx=Ta [Equation 2]
[0320] FIG. 20 is a conceptual diagram illustrating a method of
synchronizing a play time of a main AV content with a play time of
an enhanced service according to an embodiment.
[0321] As shown in FIG. 20, the video display device 100 extracts
an AV sample during a system time Tn.
[0322] The video display device 100 extracts feature information
from the extracted AV sample, and transmits a query including the
extracted feature information to the fingerprint server 22 to
receive a query result. The video display device 100 confirms
whether a start time Ts of the extracted AV sample corresponds to
11000 ms at Tm by parsing the query result.
[0323] Accordingly, the video display device 100 regards the time
of when the start time of the extracted AV sample is confirmed
according to Equation 1 as Ts+(Tm-Tn), so that, after that, the
play time of the main AV content may be synchronized with the start
time of the enhanced service.
[0324] Next, an ACR application will be described according to
various embodiments with reference to FIGS. 21 to 50.
[0325] The ACR application may include an auto playing application,
a content provider application, and a video display device
manufacturer application.
[0326] FIG. 21 is a screen when an auto playing application is
executed according to an embodiment.
[0327] The auto playing application automatically plays an enhanced
service even when a user makes no action. In this sense, the auto
playing application is designated as a lean back application in
this specification.
[0328] The auto playing application automatically plays an enhanced
service such as scene related information that a content provider
or broadcasting station provides during playing of the main AV
content according to a play time of the main AV content, without a
user's input. That is, a content provider or broadcasting station
entirely controls the auto playing application.
[0329] As shown in FIG. 21, once the auto playing application is
executed, the screen 200 may include a sub screen 210 where a
reduced main AV content is played and a sub screen 220 where
additional information is displayed. The sub screen 200 where
additional information is displayed may be spatially separated from
the sub screen 210 where a main AV content is played.
[0330] Moreover, when an auto playing application is executed, an
area where additional information is displayed may be
semi-transparent. In this case, the area where additional
information is displayed may overlay on an area where a main AV
content played.
[0331] FIG. 22 is a screen when a content provider application is
executed according to an embodiment.
[0332] In this specification, the content provider application is
designated as a full interactive application.
[0333] As shown in FIG. 22 (A), the video display device 100
downloads and stores a plurality of applications. FIG. 22 (A)
illustrates icons 230 of the applications. A content provider
application among the plurality of applications is an application
created and distributed by a content provider, and thus, may be
under control of the content provider.
[0334] A user of the video display device 100 may download a
content provider application from an application store and
determines whether to execute the downloaded content provider
application.
[0335] FIG. 22 (B) is a screen when a content provider application
is executed. As shown in FIG. 22 (B), the screen 200 may include
the sub screen 210 where a reduced main AV content is played and
the sub screen 220 where additional information is displayed.
[0336] Hereinafter, a video display device manufacturer application
will be described according to an embodiment with reference to
FIGS. 23 to 50.
[0337] The video display device manufacturer application is created
and controlled by a video display device manufacturer, and may be
stored in advance when the video display device 100 is
manufactured. That is, the video display device manufacturer
application may provide the same service and user interface
regardless of a content provider or content.
[0338] The video display device manufacturer application may
include an area where an enhanced service that a content provider
provides is displayed and an area where an enhanced service that a
video display device manufacturer provides is displayed,
separately. A user of the video display device 100 may determine
whether to execute the video display device manufacturer
application.
[0339] The video display device manufacturer application may have
two types.
[0340] The video display device manufacturer application of the
first type has a resizing user interface. The video display device
manufacturer application having the resizing user interface reduces
the size of an area where a main AV content is displayed to display
all the main AV content in a reduced area. Additionally, the video
display device manufacturer application having the resizing user
interface reshapes an area where an application is displayed with
an L or inverse-L shaped structure.
[0341] The video display device manufacturer application of the
second type has an overlay user interface. The video display device
manufacturer application having the overlay user interface
maintains the size of an area where a main AV content is displayed,
and overlaps an area where an application is displayed on the main
AV content. Since the area where an application is displayed covers
the main AV content, an application area may be
semi-transparent.
[0342] FIG. 23 is a screen when a video display device manufacturer
application having a resizing user interface is executed according
to an embodiment.
[0343] As shown in FIG. 23, the screen 300 of when a video display
device manufacturer application having a resizing user interface is
executed includes a main content area 310 where a main AV content
is displayed, a main menu area 320 where a main menu is displayed,
a notification area 330 where a notification message is displayed,
a control button area 340 where a control button is displayed to
control the video display device manufacturer application, a sub
menu area 350 where a sub menu is displayed, an additional
information area 360 where additional information is displayed, and
an advertisement area 370 where advertisement is displayed.
[0344] The control button area 340 includes an ending button 341
for ending the video display device manufacturer application, a
hiding button 342 for hiding the video display device manufacturer
application, and a back button 343 for returning to previous
information.
[0345] In the video display device manufacturer application having
the resizing user interface, the main AV content area 310 is
disposed on the top-left of the screen 300; the main menu area 320
and the notification area 330 is disposed on the bottom of the main
AV content area 310; the control button area 340 is disposed on the
top-left; the sub menu area 350 is disposed between the control
button area 340 and the additional information area 360; the
advertisement area 370 is disposed on the bottom-right; and the
additional information area 360 is disposed between the sub menu
area 350 and the advertisement area 370. However, their positions
may vary.
[0346] FIG. 24 is a screen when a video display device manufacturer
application having an overlay user interface is executed according
to an embodiment.
[0347] As shown in FIG. 24, like the video display device
manufacturer application having the resizing user interface, the
screen 300 of when the video display device manufacturer
application having the overlay user interface is executed includes
a main content area 310 where a main AV content is displayed, a
main menu area 320 where a main menu is displayed, a notification
area 330 where a notification message is displayed, a control
button area 340 where a control button is displayed to control the
video display device manufacturer application, a sub menu area 350
where a sub menu is displayed, an additional information area 360
where additional information is displayed, and an advertisement
area 370 where advertisement is displayed.
[0348] In the video display device manufacturer application having
the overlay user interface, the main AV content area 310 is
disposed on the top-left of the screen 300; the main menu area 320
and the notification area 330 is disposed on the bottom of the main
AV content area 310; the control button area 340 is disposed on the
top-left; the sub menu area 350 is disposed between the control
button area 340 and the additional information area 360; the
advertisement area 370 is disposed on the bottom-right; and the
additional information area 360 is disposed between the sub menu
area 350 and the advertisement area 370. However, their positions
may vary.
[0349] Hereinafter, a video display device manufacturer application
having a resizing user interface will be mainly described.
[0350] The video display device manufacturer application receives
necessary information from an ACR engine built in the video display
device 100 and has two types of menus largely according to its
character.
[0351] The first type menu is for a time insensitive enhanced
service. That is, when a menu relating to the time insensitive
enhanced service is selected, the video display device 100 obtains
an identifier of a main AV content that is currently played on a
screen, obtains an enhanced service on the basis of the obtained
identifier, and displays the obtained enhanced service on the
additional information area 360. Examples of such a time
insensitive enhanced service includes titles, genres, actors,
directors, and other people's evaluations, short clips, and short
explanations. Through this basic information, the video display
device 100 may search additional information, link to a social
network service such as Facebook and Twitter, or provide a
recommended service and a related advertisement.
[0352] The second type menu is for a time sensitive enhanced
service. That is, when a menu relating to the time sensitive
enhanced service is selected, the video display device 100 obtains
an identifier and play time information of a main AV content that
is currently played on a screen, obtains a time sensitive enhanced
service on the basis of the obtained identifier and play time
information, and displays the obtained enhanced service on the
additional information area 360.
[0353] The main menu of the video display device manufacturer
application includes a program menu, an information menu, a social
menu, a recommendation menu, and a catalogue menu. Among these, the
time insensitive menu includes the information menu, the social
menu, the recommendation menu, and the catalogue menu, and the time
sensitive menu includes the program menu. If the time insensitive
menu is selected, the time sensitive application may be called.
Other than these five main menus, other main menus may be added. If
each main menu is selected, a sub menu of the selected main menu is
displayed on the sub menu area 350.
[0354] FIG. 25 is a flowchart illustrating a method of executing a
video display device manufacturer application according to an
embodiment.
[0355] When receiving a user input corresponding to an application
selection menu display through pressing of a specific key of a
remote controller, shaking of a motion remote controller in a
downward direction, zooming of the cursor of a motion remote
controller in the bottom direction of the screen while a main AV
content is played in operation S901, the video display device 100
displays an application selection menu of FIG. 26 in operation
S903.
[0356] FIG. 26 is a screen when an application selection menu is
displayed according to an embodiment.
[0357] As shown in FIG. 26, the application selection menu 380 is
disposed at the bottom of the screen 300. The application selection
menu 380 may be semi-transparent.
[0358] The application selection menu 380 includes execution icons
of a plurality of applications installed in the video display
device 100. One icon of the displayed execution icons corresponds
to the execution icon of the video display device manufacturer
application.
[0359] When receiving a user input corresponding to an icon
selection of the video display device manufacturer application
through manipulating of the left and right arrow keys in a remote
controller or moving of the cursor according to a movement of a
motion remote controller in operation S905, the video display
device 100 executes the video display device manufacturer
application in operation S907. Through this, a user may immediately
execute the application if he/she wants without access to an
application store while watching a main AV content.
[0360] Once the video display device manufacturer application is
executed, its main menu is displayed. If a program menu is selected
by default, its sub menu is displayed on the sub menu area 350. An
all sub menu is selected by default among the sub menus of the
program menu. Focus is made on the all sub menu. As time elapses,
an enhanced service displayed on the additional information area
360 is automatically updated. The <-button is used for returning
to a previous menu and the X button is used for returning to an
entire screen after closing the video display device manufacturer
application.
[0361] Then, a video display device manufacturer application will
be described according to an embodiment with reference to FIGS. 27
to 29.
[0362] The program main menu is a menu for displaying an
application, which is time-related to a main AV content that is
being played, on the additional information area 360. Enhanced
service information for displaying an application linking with the
main AV content may be provided from a content owner such as TV
broadcasters. The video display device 100 analyzes the enhanced
service information to display a corresponding application in the
additional information area 360 at the right timing. UI in a screen
is shown in the drawing below.
[0363] The program menu includes an all sub menu, a participation
sub menu, and a discovery sub menu.
[0364] The all sub menu is a menu for displaying all applications
related to the participation sub menu and discovery sub menu on the
additional information area 360. The participation sub menu is a
menu for displaying an application inducing program participation
such as voting in a program. The discovery sub menu is a menu for
displaying an application such as scene related information. The
sub menu of the program menu may be added or edited according to
contents of an application that a content owner wants.
[0365] FIG. 27 is a screen when an all sub menu of a program main
menu in a video display device manufacturer application is selected
according to an embodiment.
[0366] When the all sub menu, i.e., the first sub menu of the
program main menu, is selected, the video display device 100
displays all applications related to the participation sub menu and
display sub menu on the additional information area 360.
[0367] When the all sub menu is selected, the video display device
100 displays an application or event synchronized with a specific
time on the additional information area 360. If there is no
application synchronized with a specific time, the video display
device 100 may leave the additional information area 350 as empty
space. However, since the empty space may not give motivation for
additional interaction to a user, if there is no application
synchronized with a specific time, the video display device 100 may
gather applications or events that occur prior to now in order to
display a history.
[0368] When a user enters into the video display device
manufacturer application, it may be seen that the user may have an
intention to perform an interactive application related to a main
AV content while watching the main AV content. While navigating
several menus, a user may not watch an event at a specific time.
Especially, when a user navigates menus for time insensitive
enhanced services, the above case may likely occur. Therefore,
after entering into the video display device manufacturer
application, if a time sensitive event occurs during navigation,
the video display device 100 displays a notification message for
this on the notification area 330 to notify a user that there is a
special event at the current time broadcasted from a broadcasting
station.
[0369] While a user confirms music information or place information
through the video display device manufacturer application, a time
linked application occurs, the video display device 100 displays a
notification message on the notification area 330. When receiving a
user input corresponding to the Go To button press, the video
display device 100 enters into a sub menu related to an occurring
time linked application and displays the occurring time linked
application on the additional information area 360. The
notification message may be a text message. Additionally, the video
display device 100 may display an amount of the delivered
application as a number. The notification message may be delivered
to a viewer in a Push method.
[0370] FIG. 28 is a screen when a participation sub menu of a
program main menu in a video display device manufacturer
application is selected according to an embodiment.
[0371] As shown in FIG. 28, once the participation sub menu is
selected, the video display device 100 displays an application
inducing viewer participation such as voting on the additional
information area 360. If a viewer participation application occurs,
the video display device 100 displays it on the additional
information area 360. If the viewer participation application is
voting, the video display device 100 may display voting questions
and voting results. Moreover, the video display device 100 displays
current events and also previous events that the viewer
participates on the bottom of the current event, for the viewer's
convenience.
[0372] FIG. 29 is a screen when a discovery sub menu of a program
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0373] As shown in FIG. 29, once the discovery sub menu is
selected, the video display device 100 displays all time linked
applications besides a viewer participation application on the
additional information area 360. For example, the video display
device 100 displays scene related information on products or places
shown in a main AV content. The video display device 100 may
display current scene related information and previous scene
related information simultaneously.
[0374] Moreover, the video display device 100 may display a
notification message that there is a time linked application or
event on a sub menu. For example, if a viewer participation
application occurs, the video display device 100 displays an icon
having a flashing N on the participation sub menu to induce viewer
participation. If a user does not respond to the notification for a
predetermined time, the video display device 100 may remove the
notification.
[0375] Hereinafter, an information main menu of a video display
device manufacturer application will be described according to an
embodiment with reference to FIGS. 30 to 36.
[0376] The information main menu corresponds to a time insensitive
area. Like the UI of the program main menu, the information main
menu does not operate in a UI manner that an application is
automatically displayed and disappears at a specific time. Of
course, although the above-mentioned time linked application may be
displayed through this menu, when a main menu other than the
program main menu is selected, a second service such as search
service or Twitter service may be linked.
[0377] The information main menu includes a search sub menu, a
Twitter sub menu, and a news sub menu.
[0378] Then, a search sub menu of an information main menu in a
video display device manufacturer application will be described
according to an embodiment with reference to FIGS. 30 to 32.
[0379] FIG. 30 is flowchart illustrating a searching method
according to an embodiment.
[0380] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals.
[0381] Once the search sub menu of an information main menu in a
video display device manufacturer application is selected in
operation S1002, the video display device 100 obtains a search list
including a plurality of search items corresponding to an enhanced
service on the basis of the obtained content information in
operation S1003. The search list includes at least one of genres,
actors, directors, places, and products.
[0382] The video display device 100 displays the search list on the
additional information area 360 in operation S1007. A display
example of the search list will be described with reference to FIG.
30.
[0383] FIG. 31 is a screen when a search sub menu of an information
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0384] As shown in FIG. 31, the search list includes characters of
a main AV content. The video display device 100 may display at
least one of pictures or names of a search item on the additional
information area 360.
[0385] When one of a plurality of search items is selected through
the cursor of a remote controller in operation S1009, the video
display device 100 searches information on the selected search item
in operation S1011. At this point, the video display device 100 may
use an internet search engine such as Google. Moreover, the video
display device 100 may use information such as Tribune media or
IMDb.
[0386] The video display device 100 displays the searched
information on the additional information area 360 in operation
S1013. Since the searched result is automatically retrieved through
programming such as Open API of a service provider, time for a
screen design may be greatly saved. A display example of the search
information will be described with reference to FIG. 32.
[0387] FIG. 32 is another screen when a search sub menu of an
information main menu in a video display device manufacturer
application is selected according to an embodiment.
[0388] As shown in FIG. 32, the video display device 100 displays a
search result for the selected search item on the additional
information area 360. Moreover, the video display device positions
a Twitter button and an edit button on the additional information
area 360 to follow an actor's Twitter or edit an actor's profile
such as filmography or biography.
[0389] Like this, if the searching method according to an
embodiment is used, information related to a main AV data may be
searched through one click, so that an effort to input a search
word may be reduced.
[0390] Next, a Twitter sub menu of an information main menu in a
video display device manufacturer application will be described
according to an embodiment with reference to FIGS. 33 to 34.
[0391] FIG. 33 is flowchart illustrating a chatting window
displaying method according to an embodiment.
[0392] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals in operation S1101.
[0393] Once a Twitter sub menu of an information main menu in a
video display device manufacturer application is selected in
operation S1102, the video display device 100 obtains a Twitter
chatting list corresponding to an enhanced service on the basis of
the obtained content information in operation S1103. The video
display device 100 writes a program name on Hashtag of Twitter to
load a Twitter chatting list related to the program. This chatting
list is linked to Twitter and is continuously updated in real
time.
[0394] The video display device 100 displays one chatting window in
the Twitter chatting list on the additional information area 360
through a user selection or automatically in operation S1107. A
display example of the chatting window will be described with
reference to FIG. 34.
[0395] FIG. 34 is a screen when a Twitter sub menu of an
information main menu in a video display device manufacturer
application is selected according to an embodiment.6
[0396] As shown in FIG. 34, the video display device 100 displays a
chatting window on the additional information area 360 to support
chatting between viewers watching the same program.
[0397] When a program is broadcasted, a user of the program may
directly write a message in a chatting room actually. If the video
display device 100 has a log in mechanism like Smart TV, a user of
the video display device 100 may immediately start chatting with
his own ID in a logged in state when entering into a menu. If it is
inconvenient to make an input to the video display device 100
through a remote controller, the video display device 100 may
display only a chatting message. If the video display device 100 is
linked to a second device such as Smart Phone or tablet, a message
may be typed using the input device of the second device. Although
information in Hashtag is a program name basically, it may be
selected as a tag of actors or directions, i.e., the
above-mentioned another basic information, so that a user may
selectively participate in chatting of a corresponding subject.
[0398] Next, a news sub menu of an information main menu in a video
display device manufacturer application will be described according
to an embodiment with reference to FIGS. 35 to 36.
[0399] FIG. 35 is a flowchart illustrating a news obtaining method
according to an embodiment.
[0400] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals in operation S1201.
[0401] Once the news sub menu of an information main menu in a
video display device manufacturer application is selected in
operation S1202, the video display device 100 obtains news
corresponding to an enhanced service on the basis of the obtained
content information in operation S1203. At this point, the news may
or may not relate to a main AV content. Or, the news may be
provided from a broadcaster of a main AV content. If the
broadcaster does not provide news through Open API, the video
display device 100 may receive news through News feeds of an
internet service such as Google or Yahoo.
[0402] The video display device 100 displays the obtained news on
the additional information area 360 in operation S1207. A display
example of news will be described with reference to FIG. 36.
[0403] FIG. 36 is a screen when a news sub menu of an information
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0404] As shown in FIG. 36, the video display device 100 may
display the obtained news on the additional information area
360.
[0405] Hereinafter, a social main menu of a video display device
manufacturer application will be described according to an
embodiment with reference to FIGS. 37 to 42.
[0406] The social main menu corresponds to a time insensitive area.
Like the UI of the program main menu, the social main menu does not
operate in a UI manner that an application is automatically
displayed and disappears at a specific time. Of course, although
the above-mentioned time linked application may be displayed
through this menu, when a main menu other than the program main
menu is selected, a second service such as Facebook may be
linked.
[0407] The social main menu includes a viewer list sub menu and a
preference display sub menu.
[0408] Then, a viewer list sub menu of a social main menu in a
video display device manufacturer application will be described
according to an embodiment with reference to FIGS. 37 to 40.
[0409] FIG. 37 is flowchart illustrating a viewer list displaying
method according to an embodiment.
[0410] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals in operation S1301.
[0411] Once a viewer list sub menu of a social main menu in a video
display device manufacturer application is selected in operation
S1302, the video display device 100 obtains information on a
friends list and whether each friend watches a main AV content on
the basis of the obtained content information in operation S1303.
The video display device 100 may be linked with a social network
service such as Facebook to obtain a list of friends watching a
main AV content.
[0412] The video display device 100 displays the obtained viewer
list on the additional information area 360 in operation S1307. A
display example of the viewer list will be described with reference
to FIG. 38.
[0413] FIG. 38 is a screen when a viewer list sub menu of a social
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0414] As shown in FIG. 38, the video display device 100 may
display the pictures and names of the viewers corresponding to the
obtained viewer list on the additional information area 360.
[0415] Especially, the video display device 100 may display a
friends list together with whether each friend watches contents or
only a list of friends watching contents currently.
[0416] When one friend is selected from the displayed friends list
in operation S1309, the video display device 100 confirms whether
the selected friend watches a main AV content in operation
S1311.
[0417] If the selected friend watches the main AV content, the
video display device 100 displays the chatting window of the
selected friend on the additional information are 360 in operation
S1313.
[0418] Additionally, if the selected friend does not watch the main
AV content, the video display device 100 sends a message
recommending watching the main AV content to the e-mail or mobile
phone of the selected friend in operation S1315. Even if the
selected friend does not watch the main AV content, the video
display device 100 may display the chatting window of the selected
friend on the additional information are 360.
[0419] For chatting, a user may use the remote controller of the
video display device 100 or the input device of the second device
connected to the video display device 100, and may chat with
friends through a social network service application of a smart
phone regardless of the video display device 100. In any cases, a
chatting screen of the social network service may be displayed on
the screen of the video display device 100. Through buttons for
evaluating a program, a user may send his/her intention to friends.
For example, a user may notify friends that he/she currently
watches a main AV content and may recommend friends who do not
watch the main AV content currently to watch it through a "good"
button.
[0420] Like this, the video display device 100 automatically
realizes who is watching which program by using an ACR technique
through a viewer list sub menu. In order to confirm who is watching
which program, a user needs to log in. Once an account for log in
is registered in the video display device 100, each time the video
display device 100 is turned on, a user may log in automatically.
Therefore, the video display device 100 may realize who is watching
a main AV content.
[0421] FIG. 39 is a signal flow when a video display device obtains
a friends list and watching information according to an
embodiment.
[0422] As shown in FIG. 39, if a video display device of a friend A
plays a main AV content A, it transmits an identifier of the main
AV content A and an identifier of the friend A to the SNS providing
server 75 in operation S1401.
[0423] Additionally, if a video display device of a friend B plays
the main AV content A, it transmits an identifier of the main AV
content A and an identifier of the friend B to the SNS providing
server 75 in operation S1403.
[0424] If the video display device 100 plays the main AV content A,
it transmits a user ID and an identifier of the main AV content A
to the SNS providing server 75 in operation S1405.
[0425] The SNS providing server 75 confirms information on a
friends list of the video display device 100 and whether each
friend watches a main AV content on the basis of the friend
relationship information and received content identifiers in
operation S1407.
[0426] FIG. 40 is a signal flow when a video display device obtains
a friends list and watching information according to another
embodiment.
[0427] As shown in FIG. 40, if a video display device of a friend A
plays a main AV content A, it transmits an identifier of the friend
A to the SNS providing server 75 in operation S1501, and transmits
the main AV content A to the ACR sever in operation S1503. The ACR
server 77 may be one of a watermark server 21, a fingerprint server
22, an enhanced service information providing server 40, and an
enhanced service providing sever 50.
[0428] Additionally, if a video display device of a friend B plays
the main AV content A, it transmits an identifier of the friend B
to the SNS providing server 75 in operation S1505, and transmits
the main AV content A to the ACR sever 77 in operation S1507.
[0429] The video display device 100 transmits a user ID to the SNS
providing server 75 in operation 1509.
[0430] Then, the SNS providing server 75 provides a friend list
corresponding to the user ID to the ACR server 75 in operation
S1511.
[0431] Moreover, if the video display device 100 plays the main AV
content A, it transmits a user ID and an identifier of the main AV
content A to the ACR server 75 in operation S1513.
[0432] The ACR server 75 confirms information on the friends list
of the video display device 100 and whether each friend watches a
main AV content on the basis of the friends list corresponding to
the user ID and content identifier, and then, provides the
confirmed information to the video display device 100 in operation
S1515.
[0433] Then, a preference display sub menu of a social main menu in
a video display device manufacturer application will be described
according to an embodiment with reference to FIGS. 41 to 42.
[0434] FIG. 41 is flowchart illustrating a preference displaying
method according to an embodiment.
[0435] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals in operation S1601.
[0436] Once a preference display sub menu of a social main menu in
a video display device manufacturer application is selected in
operation S1602, the video display device 100 obtains a preference
display list including a plurality of preference display items on
the basis of the obtained content information in operation S1603.
Here, the preference display item may include preview or a preview
address. The preview may be an image or a short video. The preview
may be directly provided from a broadcaster through Open API, or
may be obtained by a search engine of an internet service, or
obtained by extracting only a necessary portion from an internet
server of a broadcaster. An image corresponding to a core scene in
several min of a time interval may be provided or one image for one
program may be provided.
[0437] The video display device 100 displays the obtained
preference display list on the additional information area 360 in
operation S1607. A display example of the viewer list will be
described with reference to FIG. 42.
[0438] FIG. 42 is a screen when a preference display sub menu of a
social main menu in a video display device manufacturer application
is selected according to an embodiment.
[0439] As shown in FIG. 42, the video display device 100 may
display previews in a preference display list and "Like it" buttons
for preference display on the additional information area 360.
[0440] Once the "Like it" button corresponding to one preference
display item is selected in operation S1609, the video display
device 100 posts a preview and simple text corresponding to the
selected preference display item on SNS such as Facebook in
operation S1611. Here, the simple text may be automatically
generated, or may be inputted through a remote controller or an
input device of a second device.
[0441] Hereinafter, a recommendation main menu of a video display
device manufacturer application will be described according to an
embodiment with reference to FIGS. 43 to 46.
[0442] The recommendation main menu corresponds to a time
insensitive area. Like the UI of the program main menu, the
recommendation main menu does not operate in a UI manner that an
application is automatically displayed and disappears at a specific
time. Of course, through this menu, the above-mentioned time linked
application may be displayed but if a recommendation menu is
selected, another service may be linked.
[0443] The recommendation main menu may include a previous episode
sub menu, a VOD sub menu, and an application sub menu.
[0444] FIG. 43 is flowchart illustrating a digital media
downloading method according to an embodiment.
[0445] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals in operation S1701.
[0446] Once a recommendation main menu of a video display device
manufacturer application is selected in operation S1702, the video
display device manufacturer application obtains a digital media
list on the basis of the obtained content information in operation
S1703. If the previous episode sub menu is selected, the video
display device 100 obtains a previous episode list. If the VOD sub
menu is selected, the video display device 100 obtains a VOD list
that relates to a main AV content or a provider of the main AV
content recommends. If the application sub menu is selected, the
video display device 100 obtains a VOD list that relates to a main
AV content or a provider of the main AV content recommends. Here,
the digital media list may include a preview, a preview address,
and an icon related image.
[0447] The video display device manufacturer application displays
the obtained digital media list on the additional information area
360 in operation S1707.
[0448] An example of a previous episode list is described with
reference to FIG. 44.
[0449] FIG. 44 is a screen when a previous episode sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0450] As shown in FIG. 44, the video display device 100 displays
previews and titles of a previous episode list on the additional
information area 360. Like this, according to an embodiment, the
video display device 100 may automatically search and display a
previous episode without user's manipulation.
[0451] A display example of the VOD list will be described with
reference to FIG. 45.
[0452] FIG. 45 is a screen when a VOD sub menu of a recommendation
main menu in a video display device manufacturer application is
selected according to an embodiment.
[0453] As shown in FIG. 45, the video display device 100 displays
previews and titles of a VOD list on the additional information
area 360. Like this, according to an embodiment, the video display
device 100 may automatically search and display VOD related to a
main AV content without user's manipulation.
[0454] A display example of the application list will be described
with reference to FIG. 46.
[0455] FIG. 46 is a screen when an application sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0456] As shown in FIG. 46, the video display device 100 displays
icons and application names of the application list on the
additional information area 360. Like this, according to an
embodiment, the video display device 100 may automatically search
and display applications related to a main AV content without
user's manipulation.
[0457] Once one item is selected from the digital media list in
operation S1709, the video display device manufacturer application
downloads a digital media corresponding to the selected item in
operation S1711. At this point, the video display device 100 may
download the digital media after payment. If the selected item is a
previous episode or VOD, the video display device 100 may play the
downloaded digital media. If the selected item is an application,
the video display device may automatically play the downloaded
application or may play it through a user's selection.
[0458] Like this, according to an embodiment, the video display
device may download digital media through simple manipulation.
[0459] Hereinafter, a catalog main menu of a video display device
manufacturer application will be described according to an
embodiment with reference to FIGS. 47 to 50.
[0460] The catalog main menu corresponds to a time insensitive
area. Like the UI of the program main menu, the catalog main menu
does not operate in a UI manner that an application is
automatically displayed and disappears at a specific time. Of
course, through this menu, the above-mentioned time linked
application may be displayed but if a catalog menu is selected,
another service may be linked.
[0461] The catalog main menu may include a style sub menu, a music
sub menu, and another sub menu.
[0462] FIG. 47 is flowchart illustrating a catalog displaying
method according to an embodiment.
[0463] The video display device 100 extracts some intervals of a
main AV content and obtains content information on the basis of the
extracted intervals in operation S1801.
[0464] Once a sub menu of a catalog main menu in a video display
device manufacturer application is selected in operation S1802, the
video display device manufacturer application obtains a catalog
list on the basis of the obtained content information in operation
S1803. If the style sub menu is selected, the video display device
100 obtains a clothing catalog list that relates to a main AV
content or a provider of the main AV content recommends. If the
music sub menu is selected, the video display device 100 obtains a
music catalog list that relates to a main AV content or a provider
of the main AV content recommends. If the other sub menu is
selected, the video display device 100 obtains a products or places
catalog list that relates to a main AV content or a provider of the
main AV content recommends. Here, the digital media list may
include a related image, price information, description, and
coupon. The coupon may be numbers or QR codes. The video display
device 100 may display coupons only when a user watches a main AV
content, or may allow a user to use it during the available period
after storing it on the memory 150.
[0465] The video display device manufacturer application displays
the obtained catalog list on the additional information area 360 in
operation S1807.
[0466] A display example of the clothing catalog list will be
described with reference to FIG. 48.
[0467] FIG. 48 is a screen when a style sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0468] As shown in FIG. 48, the video display device 100 displays
maker information, price information, of description information of
clothing related to a main AV content on the additional information
area 360. Like this, according to an embodiment, the video display
device 100 may automatically search and display a clothing catalog
related to a main AV content without user's manipulation.
[0469] An example of a music catalog list is described with
reference to FIG. 49.
[0470] FIG. 49 is a screen when a music sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0471] As shown in FIG. 49, the video display device 100 displays
singer information, price information, and description information
of music related to a main AV content on the additional information
area 360. Like this, according to an embodiment, the video display
device 100 may automatically search and display a music catalog
related to a main AV content without user's manipulation.
[0472] A display example of another catalog list will be described
with reference to FIG. 50.
[0473] FIG. 50 is a screen when another sub menu of a
recommendation main menu in a video display device manufacturer
application is selected according to an embodiment.
[0474] As shown in FIG. 50, the video display device 100 displays
price information and description information of products and
places related to a main AV content on the additional information
area 360. Like this, according to an embodiment, the video display
device 100 may automatically search and display a products or
places catalog related to a main AV content without user's
manipulation.
[0475] Once one item is selected from the catalog list in operation
S1809, the video display device manufacturer application displays a
purchase item corresponding to the selected item in operation
S1811.
[0476] Like this, according to an embodiment, a user may purchase
products through simple manipulation.
[0477] A post purchase review button and a bookmark button may be
disposed at each item in the catalog list.
[0478] Once the post purchase review button is selected, the video
display device 100 may display a post use review of a product on
the additional information are 360. Additionally, a user may write
a post purchase review.
[0479] Additionally, after bookmarking a specific item through the
bookmark button, a user may recommend the bookmarked item through a
viewer list sub menu of a social main menu.
[0480] In this case, the video display device 100 may provide
bookmark item information to the ACR server 77 or SNS providing
server 75.
[0481] Then, the video display device 100 of a user receiving the
recommendation obtains content information on the basis of the
extracted interval from a main AV content, and may display a
recommendation message such as "this product is recommended by a
friend U" if the main AV content corresponds to an advertisement of
the recommended item on the basis of the obtained content
information. Additionally, instead of a recommendation message, a
short video may be displayed.
[0482] Then, an on/off control of an ACR function will be described
according to an embodiment with reference to FIGS. 51 and 52.
[0483] FIG. 51 is a view of a user interface for controlling an ACR
function according to an embodiment.
[0484] As shown in FIG. 51, the play controlling unit 113 displays
an ACR function setting window. A user may activate or deactivate
the ACR function through the ACR function setting window.
[0485] When the ACR function is activated, a user may select an ACR
mode. The ACR mode may be set with one of an auto playing
application mode, a content provider application mode, and a video
display device manufacturer application mode.
[0486] When the ACR function mode is set in the above manner, the
play controlling unit 113 stores setting information on a setting
information storage unit 154.
[0487] FIG. 52 is a flowchart illustrating a method of controlling
a video display device according to the embodiment.
[0488] The enhanced service management unit 130 confirms whether
the ACR function is turned on in operation S1901.
[0489] If the ACR function is deactivated, the enhanced service
management unit 130 does not perform a content information
obtaining procedure any more.
[0490] If the ACR function is activated, the enhanced service
management unit 130 extracts some intervals of a main AV content in
operation S1902.
[0491] The enhanced service management unit 130 obtains content
information of the main AV content on the basis of the extracted
interval in operation S1903.
[0492] The enhanced service management unit 130 synchronizes the
reference time of the main AV content with the reference time of an
alternative advertisement in operation S1905.
[0493] The enhanced service management unit 130 obtains an enhanced
service on the basis of the obtained content information in
operation S1907. The enhanced service management unit 130 obtains
enhanced service information on the basis of the content
information, and then obtains an enhanced service on the basis of
the enhanced service information.
[0494] Then, the enhanced service management unit 130 confirms the
ACR mode in operation S1909.
[0495] The enhanced service management unit 130 plays the enhanced
service according to the ACR mode in operation S1911.
[0496] In more detail, if the ACR mode is an automatic play
application mode, the enhanced service management unit 130 executes
an automatic play application, and the executed automatic play
application plays the obtained enhanced service.
[0497] If the ACR mode is the content provider application mode,
the enhanced service management unit 130 executes a content
provider application corresponding to the obtained content
information in background. The enhanced service management unit 130
displays a content provider application when receiving a user input
corresponding to an enhanced service use. This content provider
application may play the obtained enhanced service. Instead that
the content provider application is automatically executed in
background, it may be executed by a user input.
[0498] If the ACR mode is the video display device manufacturer
application mode, the enhanced service management unit 130 executes
its video display device manufacturer application in background.
The enhanced service management unit 130 displays the video display
device manufacturer application when receiving a user input
corresponding to an enhanced service use. This video display device
manufacturer application may play the obtained enhanced service.
Instead that the video display device manufacturer application is
automatically executed in background, it may be executed by a user
input.
[0499] Hereinafter, a method of receiving an enhanced service and a
video display device thereof will be described with reference to
FIGS. 53 to 77. Overlapping description related to FIGS. 1 to 52
will be omitted for conciseness.
[0500] FIG. 53 is a flowchart illustrating a method of receiving an
enhanced service according to a first embodiment.
[0501] Referring to FIG. 53, the video display device 100 receives
an AV content in operation S2001, and extracts first feature
information from the received AV content in operation S2002.
[0502] In more detail, the video display device 100 may extract
feature information such as signature from some video frames or a
section of audio samples of the received AV content.
[0503] Then, the video display device 100 transmits the extracted
first feature information to the first server in operation S2003,
and receives a database (DB) including at least one of content
information, enhanced service information, and enhanced service,
which are related to the first feature information, from the first
server 52004.
[0504] In more detail, the video display device 100 accesses the
fingerprint server 22 corresponding to a predetermined fingerprint
server address to transmit a query including the extracted first
feature information, and the fingerprint server 22 may sequentially
transmit a content database related to the first feature
information in reply to the query.
[0505] The fingerprint server 22 identifies an AV content (for
example, a program that a user watches currently) played in the
video display device 100 by using the first feature information
received from the video display device 100, and then sequentially
transmits all content information or enhanced service information
related to the AV content to the video display device 100, starting
from information corresponding to the feature information.
[0506] The content information sequentially transmitted from the
fingerprint server 22 may have the format described with reference
to FIG. 7, and may include content identification information
(Content ID) and time information (timestamp).
[0507] Additionally, the enhanced service sequentially transmitted
from the fingerprint server 22 may include enhanced service address
information for accessing the enhanced service providing server 50
that provides enhanced service or an enhanced service information
providing server address information for accessing the enhanced
service information providing server 40 that provides an address of
the enhanced service providing server 50.
[0508] In the above case, the content database sequentially
transmitted from the fingerprint server 22 may include a plurality
of information having the format of FIG. 7.
[0509] Additionally, the fingerprint server 22 identifies an AV
content (for example, a program that a user watches currently)
played in the video display device 100 by using the first feature
information received from the video display device 100, and then
sequentially transmits all enhanced services related to the AV
content to the video display device 100.
[0510] Each enhanced service sequentially transmitted from the
fingerprint server 22 may include an available enhanced service
file.
[0511] That is, the fingerprint server 22 does not provide only one
of content information, enhanced service information, and enhanced
service corresponding to the first feature information received
from the video display device 100, to the video display device 100,
but provides all database related to the received AV content in
internal database, to the video display device 100.
[0512] Then, the video display device 100 stores the database
received from the first server in the memory in operation
S2005.
[0513] After all database related to the AV content is received
from the fingerprint server 22 and then is stored in the internal
memory of the video display device 100, the feature information
extracted from the received AV content is not transmitted to the
fingerprint server 22 and is searched first in the database stored
in the internal memory of the video display device 100.
[0514] Moreover, in order to improve search efficiency when the
database is searched later using the feature information, a
database transmitted from the fingerprint server 22 may be stored
in the memory in a transmission order. A linear search method using
the feature information or content identification information
(Content ID) as a key element may be available.
[0515] Additionally, the video display device 100 may obtain a
transmission period of data transmitted from the fingerprint server
22 by using UpdateMode and PollingCycle field values of Signaling
Channel Information in a query result format as shown in FIG.
7.
[0516] After receiving the database, the video display device 100
extracts second feature information from the currently received AV
content in operation S2006, and searches and obtains one of content
information, enhanced service information, and enhanced service
corresponding to the extracted second feature information, from the
database in operation S2007.
[0517] Moreover, if the content information, enhanced service
information, and enhanced service corresponding to the extracted
second feature information are not in the database stored in the
internal memory of the video display device 100, the video display
device 100 transmits a query including the second extraction
information to the fingerprint server 22 to receive a database
related to the second extraction information and store it in the
memory.
[0518] Hereinafter, referring to FIGS. 54 to 57, a method of
receiving an enhanced service by using a database stored in the
internal memory of the video display device 100 will be described
according to embodiments.
[0519] Referring to FIG. 54, the video display device 100 may
include a receiving unit 161, a feature extracting unit 162, a DB
searching unit 163, a database 164, and a data
transmitting/receiving unit 165.
[0520] The receiving unit 161 receives an AV content, and the
feature extracting unit 162 extracts feature information from the
received AV content.
[0521] Additionally, the data transmitting/receiving unit 165
transmits the extracted feature information to the fingerprint
server 22, and then receives a database related to the feature
information from the database fingerprint server 22.
[0522] Moreover, the received database 164 may be stored in the
internal memory of the video display device 100.
[0523] For example, when the database 164 generated in the video
display device 100 includes a plurality of feature information and
a plurality of content identification information (Content ID)
corresponding thereto respectively, the DB searching unit 163
receives the feature information of the currently received AV
content from the feature extracting unit 162, and then, searches
content identification information corresponding to the feature
information from the database 164.
[0524] Moreover, the data transmitting/receiving unit 165 transmits
the content identification information (Content ID) obtained
through the DB searching unit 163 to the fingerprint server 22, in
order to obtain an address of the enhanced service information
providing server 40.
[0525] Then, the data transmitting/receiving unit 165 accesses the
enhanced service information providing server 40 by using the
obtained address to obtain an address of the enhanced service
providing server 50, and then accesses the enhanced service
providing server 50 to receive an enhanced service.
[0526] According to another embodiment, when the database 164
generated in the video display device 100 includes a plurality of
feature information and addresses of the enhanced service
information providing servers 40 corresponding thereto, the DB
searching unit 163 may search an address of the enhanced service
information providing server 40 from the database 164 by using the
feature information inputted from the feature extracting unit
162.
[0527] In this case, after an address of the enhanced service
providing server 50 is obtained by accessing the enhanced service
information providing server 40 through the searched address, the
enhanced service may be received by accessing the enhanced service
providing server 50.
[0528] Referring to FIG. 55, when the database 164 generated in the
video display device 100 includes a plurality of feature
information and enhanced service access information (i.e.,
addresses of the enhanced service providing servers 50)
corresponding thereto respectively, the DB searching unit 163 may
search an address of the enhanced service information providing
server 50 from the database 164 by using the feature information
inputted from the feature extracting unit 162.
[0529] In this case, the DB searching unit 163 accesses the
enhanced service providing server 50 by using the searched address
to receive an enhanced service.
[0530] Referring to FIG. 56, when the database 164 generated in the
video display device 100 includes a plurality of feature
information and enhanced service files corresponding thereto
respectively, the DB searching unit 163 may search the database by
using the feature information inputted from the feature extracting
unit 162 to obtain an enhanced service corresponding to the
extracted information.
[0531] Moreover, when a channel receiving the AV content is
changed, after a predetermined time from the channel change
elapses, the database 164 stored in the internal memory of the
video display device 100 may be deleted.
[0532] For example, the database 164 is not deleted immediately
after the channel change, it may be deleted after the maximum 30
min elapses based on the time information (NTPtimStamp) of the
channel change timing.
[0533] Additionally, when the changed channel returns to the
previous channel after the channel change, the video display device
100 may transmit a query including feature information to the
fingerprint server 22 if there is no information corresponding to
the feature information after searching the database 164 stored in
the memory first.
[0534] A method of receiving an enhanced service by using the
database in the video display device 100 was described as a
fingerprint based content recognizing manner, with reference to the
FIGS. 53 to 56, but the present invention is not limited thereto.
That is, this method also may be applicable to the watermark based
content recognizing manner described with reference to FIGS. 2 and
3.
[0535] Referring to FIG. 57, the watermark extracting unit 166 of
the video display device 100 extracts watermark information
inserted in the received AV content. The DB searching unit 163 may
search the database 164 by using the extracted watermark
information, and may receive an enhanced service by using the
content information or enhanced service information, which is
obtained by searching the database 164.
[0536] For example, the DB searching unit 163 searches the database
164 by using content identification information (Content ID) on the
AC content extracted by the watermark extraction unit 166 to obtain
enhanced service access information (i.e., an address of the
enhanced service providing server 50), and the data
transmitting/receiving unit 165 may access the enhanced service
providing server 50 by using the obtained access information to
receive an enhanced service.
[0537] FIG. 58 is a flowchart illustrating a method of receiving an
enhanced service according to a second embodiment.
[0538] Referring to FIG. 58, the video display device 100 receives
an AV content in operation S2101, and extracts first feature
information from the received AV content in operation S2102.
[0539] Then, the video display device 100 transmits the extracted
first feature information to the first server in operation S2103,
and receives content information corresponding to the first feature
information from the first server S2104.
[0540] For example, the first server may be the fingerprint server
22, and the information received in operation S2104 may have the
query result format described with reference to FIG. 7.
[0541] In this case, the video display device 100 may extract
content identification information (Content ID) and time
information (timestamp) from the query result received from the
fingerprint server 22, and then, may store them therein.
[0542] Then, the video display device 100 extracts second feature
information of the received AV content in operation S2105,
transmits the extracted second feature information in addition to
the content information previously received from the first server
to the first server in operation S2106, and then, receives content
information corresponding to the second feature information from
the first server in operation S2017.
[0543] Referring to FIG. 59, the video display device 100 does not
transmit only the extracted second feature information to the
fingerprint server 22 in operation S2106. That is, the video
display device 100 transmits to the fingerprint server 22 a query
including both the second feature information and the content
information (for example, content identification information
(Content ID) and time information (timestamp)) previously received
in operation S2104 according to the first feature information.
[0544] Moreover, the fingerprint server 22 searches the internal
database by using the feature information (for example, the second
feature information) received from the video display device 100,
the content identification information (Content ID), and the time
information (timestamp), and then, transmits a query result
corresponding thereto to the video display device 100.
[0545] According to an embodiment, in order to improve database
search speed and efficiency in the fingerprint server 22, a new
search database including content information only related to the
feature information (for example, the first feature information)
first received from the video display device 100 may be
generated.
[0546] Referring to FIG. 60, the fingerprint server 22 may include
a database including a plurality of feature information, content
information (for example, content identification information
(Content ID), time information (Start time and End time), content
related naming information such as Show names, Episode names, and
Broadcasters) corresponding thereto, respectively.
[0547] In this case, after receiving the first featuring
information from the video display device 100, the fingerprint
server 22 may generate a new search database only including content
information on feature information that includes the content
identification information (Content ID) corresponding to the first
feature information.
[0548] For example, when the first feature information received
from the video display device 100 is "xyzACB123" and the content
identification information (Content ID) corresponding to the first
feature information is "Content1234", a new search database only
including content information on content identification information
(Content ID) having "Content1234" as shown in FIG. 61 may be
generated in the fingerprint server 22.
[0549] Then, with respect to the next feature information (for
example, the second feature information) received from the video
display device 100, the fingerprint server 22 may perform search by
using the newly generated search database.
[0550] In the above, the case that the video display device 100
transmits feature information in addition to previously received
identification information (Content ID) and time information
(timestamp) to the fingerprint server 22 was described, but the
present invention is not limited thereto.
[0551] Referring to FIG. 62, the video display device 100 transmits
to the fingerprint server 22 a query including feature information
(for example, the second feature information) extracted from a
currently received AV content and previously received content
identification information (Content ID), and searches the newly
generated search database of FIG. 61 by using the received feature
information and content identification information (Content
ID).
[0552] Additionally, as shown in FIG. 63, the video display device
100 transmits to the fingerprint server 22 a query only including
feature information (for example, the second feature information)
extracted from a currently received AV content, and the fingerprint
server 22 searches the newly generated search database of FIG. 61
by using the received feature information.
[0553] In this case, the fingerprint server 22 caches a query
result corresponding to the first received feature information (for
example, the first feature information) therein, and searches the
newly generated search database by using the received feature
information (for example, the second feature information) and the
query result cached therein.
[0554] For example, the query result cached in the fingerprint
server 22 may include content identification information (Content
ID) and time information (timestamp) corresponding to the first
feature information.
[0555] A method of performing search by using a newly generated
database in the fingerprint server 22 was described as a
fingerprint based content recognizing manner, with reference to the
FIGS. 58 to 63, but the present invention is not limited thereto.
That is, this method also may be applicable to the watermark based
content recognizing manner described with reference to FIGS. 2 and
3.
[0556] Moreover, broadcasters, i.e., content providers, may provide
content information after making a contract with at least one of a
plurality of Automatic Content Recognition (ACR) service providers,
and the ACR service providers may use respectively different
recognition methods.
[0557] An AV content generated according to the respectively
different content recognition methods is required to be processed
by an ACR module supporting each corresponding recognition
method.
[0558] Accordingly, each ACR service provider provides an ACR
module supporting a content recognition method that it uses to the
video display device 100, and the video display device 100 inputs
an AV content related to the ACR service provider to a
corresponding ACR module to obtain content information.
[0559] For example, in the case of the fingerprint based content
recognizing manner, the video display device 100 samples the
received uncompressed AV content for a predetermined time to
extract feature information (e.g., signature) of a video area or a
pattern of an audio area. The feature information may be
differently extracted according to a specific content recognizing
manner.
[0560] That is, solutions for the content recognizing techniques
are developed diversely. Since the content recognizing techniques
extract patterns, i.e., feature information, from the uncompressed
AV content through respectively different algorithms, the extracted
pattern may vary according to each algorithm.
[0561] According to an embodiment, the video display device 100 may
include a plurality of ACR modules supporting respectively
different recognizing manners, and may select one corresponding to
a received AV content from the plurality of ACR modules to obtain
content identification information on the AV content.
[0562] Referring to FIG. 64, a plurality of broadcasting stations
11, 12, and 13 may provide content information to at least one of a
plurality of ACR service providers 23, 24, and 25, and the ACR
service providers 23, 24, and 25 may provide a content recognizing
service to the video display device 100 according to respectively
different content recognizing manners.
[0563] The video display device 100 may include a plurality of ACR
modules 171, 172, and 173 supporting the content recognizing
manners that each of the ACR service providers 23, 24, and 25
uses.
[0564] For example, a first broadcasting station 11 provides
information on an AV content that it transmits to a first ACR
service provider 11 and a second ACR service provider 24, and
accordingly, a first ACR module 171 and a second ACR module 172
corresponding to the respective first and second ACR service
providers 23 and 24 are downloaded into the video display device
100.
[0565] In this case, the AV content received from the first
broadcasting station 11 may be recognized by one of the first and
second ACR modules 171 and 172 in the video display device 100.
[0566] Additionally, the second broadcasting station 12 provides
content information to the second and third ACR service providers
24 and 25, and accordingly, the second ACR module 172 and the third
ACR module 173 corresponding to the respective second and third ACR
service providers 24 and 25 are downloaded into the video display
device 100.
[0567] In this case, the AV content received from the second
broadcasting station 12 may be recognized by one of the second and
third ACR modules 172 and 173 in the video display device 100.
[0568] Moreover, the AV content received from the third
broadcasting station 13 may be recognized by the third ACR module
173 in the video display device 100.
[0569] For this, the video display device 100 includes a memory
storage for storing a plurality of ACR modules 171, 172, and 173,
and recognizes the number and kinds of ACR modules that a
corresponding device may receive through a pre-stored internet
address.
[0570] Unlike this, the video display device 100 may store an
internet address of each broadcasting station in advance, and may
recognize the number of kinds of ACR modules that a corresponding
device may receive through an internet address of a corresponding
broadcasting station.
[0571] Moreover, the ACR modules may provide a broadcaster list for
content information provided through each corresponding module, and
the ACR module may be downloaded in the video display device 100
through one of a manufacturer, a broadcaster, and an ACR service
provider of the video display device 100.
[0572] For example, if a manufacturer of the video display device
100 provides an ACR module, the video display device 100 may
receive a list of installable ACR modules through a predetermined
internet address as power is on.
[0573] The received list includes version information of each
module. When a corresponding module is already installed in the
video display device 100, it is determined whether update is made
or not after comparing the installed ACR module with version
information of a module in the list.
[0574] Moreover, when a corresponding module is not installed in
the video display device 100, a new ACR module is downloaded and
installed.
[0575] Additionally, when an ACR module not in the received list is
installed in the video display device 100, it means that a
corresponding module is no longer necessary so that it may be
deleted from the video display device 100.
[0576] Moreover, when a broadcaster provides an ACR module, the
video display device 100 receives a list of ACR modules supporting
a corresponding broadcaster through a predetermined broadcaster
internet address as power is on.
[0577] After receiving an ACR module list for each of broadcasters,
the video display device 100 may include a list of the minimum ACR
modules for processing contents of the broadcasters.
[0578] Then, the video display device 100 downloads ACR modules
according to the list.
[0579] Referring to FIG. 65, a video of an AV content received as
an external input through an external interface 174 of the video
display device 100 may include a data block having a plurality of
video frames in pixel unit, provided from a video processing unit
175.
[0580] Moreover, an audio of the received AV content may include
data block having a digitized sound pitch provided from Pulse
Coding Modulation (PCM) of an audio processing unit 176.
[0581] As mentioned above, when the video and audio format of the
received AV content is unified and standardized, since contents
inputted to the plurality of ACR modules 171, 172, and 173 have the
same format, the video display device 100 may be easily
developed.
[0582] Furthermore, the ACR module 171 recognizes a data block
inputted from the video processing unit 175 or the audio processing
unit 176 according to a specific algorithm, so thereby outputting
information on the AV content, for example, content identification
information (Content ID).
[0583] In addition, content information outputted from the ACR
module 171 may be converted into the standardized format through
the output processing unit 177.
[0584] FIG. 66 is a flowchart illustrating a method of receiving an
enhanced service according to a third embodiment.
[0585] Referring to FIG. 66, the video display device 100 receives
an AV content in operation S2201, and selects a plurality of ACR
modules supporting respectively different recognizing manners
according to a predetermined priority in operation S2202.
[0586] For example, the video display device 100 inquires a list of
the ACR modules 171, 172, and 173 therein, and then, sequentially
inputs the received AV content (in more detail, a data block
inputted from the video processing unit 175 or the audio processing
unit 176) into the ACR modules 171, 172, and 173.
[0587] Moreover, an order of the inputted AV content may follow the
predetermined priority, and the priority may be determined
according to one of channel watching timing, channel preference,
and the number of channels.
[0588] For example, the AV content is inputted to an ACR module for
providing content information on the most recent watching channel
among the ACR modules 171, 172, and 173, and then, the AV content
is sequentially inputted according to a fast order of the watching
timing.
[0589] Additionally, the AV content is inputted to an ACR module
for providing content information on the most watched channel among
the ACR modules 171, 172, and 173, and then, the AV content is
sequentially inputted according to the number of watching.
[0590] Additionally, the AV content is inputted to an ACR module
for providing content information on the most watched channel among
the ACR modules 171, 172, and 173, and then, the AV content is
sequentially inputted starting from the largest one according to
the number of watching.
[0591] Moreover, the control unit (not shown) in the video display
device 100 may sequentially confirm which one of the ACR modules
171, 172, and 173 recognizes the AV content according to an
inputted order of the AV content.
[0592] According to the confirmed result, if one of the ACR modules
171, 172, and 173 recognizes the AV content, that is, if the
content identification information (for example, Content ID) on the
AV content is outputted from the ACR module, the control unit may
select a corresponding ACR module among the ACR modules 171, 172,
and 173.
[0593] Then, content identification information on the AV content
obtained using the selected ACR module is transmitted to the server
in operation S2204, and an enhanced service corresponding to the
content identification information is received in operation
S2205.
[0594] Since a method of receiving an enhanced service
corresponding to content identification information in operation
S2205 is identical to that described with reference to FIGS. 1 to
9, its detailed description will be omitted.
[0595] As mentioned above, the video display device 100 includes
three ACR modules according to an embodiment, but the present
invention is not limited thereto. That is, the video display device
may include two or more than four ACR modules.
[0596] Moreover, as shown in FIG. 64, a plurality of ACR modules
may have a similar function. Since content recognition needs to be
automatically performed, an ACR module may be required to operate
in background of the video display device 100.
[0597] According to another embodiment, the video display device
100 may not include a plurality of ACR modules and may include one
common module for a plurality of content recognizing manners.
[0598] Referring to FIG. 67, the video display device 100 sets at
least one sampling parameter for extracting some samples from an AV
content in operation S2301, and then obtains a sample by sampling
an AV content according to the set parameter in operation
S2302.
[0599] Then, the video display device 100 transmits the obtained
sample to a server in operation S2303, and receives content
identification information on the AV content from the server in
operation S2304.
[0600] For example, the video display device 100 may transmit raw
data of the AV content for extracting an actual bit pattern such as
feature information to a server, in order to reduce the load for a
plurality of ACR modules.
[0601] Accordingly, the video display device 100 may include only a
module for obtaining raw data, which is to be transmitted to the
server, from the received AV content, regardless of a content
recognizing manner.
[0602] Moreover, the server processes the raw data received from
the video display device 100, and then, provides a query result
including content identification information on the AV content to
the video display device 100.
[0603] In this case, since patterns of necessary data may vary
according to a content recognizing manner, the video display device
100 and the server may negotiate and determine a pattern of the
transmitted/received raw data in advance.
[0604] In more detail, the video display device 100 may sample the
received AV content as the raw data, and then transmits the
obtained video sample or audio sample as it is to the server.
[0605] In this case, the video display device 100 may negotiate
with the server and set at least one sampling parameter for
extracting a sample from an AV content, and the sampling parameter
may include a sampling time having information on how long the AV
content is sampled to obtain a sample.
[0606] That is, if the sampling time is not sufficiently long, a
content matching result processed in the server may not be
accurate, and if it is excessively long, a network transmission
time and a processing time in the server may be unnecessarily
increased.
[0607] Additionally, the sampling parameter may include attribute
information on a video or audio sample transmitted from the video
display device 100.
[0608] For example, in the case of a video sample, sampling
parameters may include an aspect ratio and position of a sampled
area, the number of frames per sec, a compression format, and a
sampling time.
[0609] Referring to FIG. 68, the video sample may be obtained by
sampling an entire area (for example, 1920.times.1080 in the case
of an HD video) of the screen 181 of the AV content or a portion of
the screen 181.
[0610] For example, the sampled area may be positioned on the top
right where a title of the corresponding content appears
frequently, and the position of the sampled area may be disposed
using the coordinates of a specific point of the screen 181.
[0611] Additionally, when an entire area of the screen 181 is
sampled, the sampled video sample is resized to smaller one, and
then, is transmitted to the server.
[0612] Moreover, as shown in FIG. 69, the video sample may be
obtained by sampling a plurality of areas (for example, areas at
the four direction edges 182, 183, 184, and 185) in the screen
181.
[0613] Moreover, the number of frames per sec of the video sample
may be 24, 30, or 60, and is determined based on whether time is
sensitive in content recognition.
[0614] Moreover, the video display device 100 may transmit the
video sample to the server without or with compression, and when
the video sample is transmitted with compression, information (for
example, h.264, mpeg2-ts, and wmv) on the compression file format
is determined in negotiation with the server.
[0615] Furthermore, when the video sample is transmitted without
compression, information on RGB bit pattern or an YPbPr bit pattern
may be required.
[0616] The determining of the sampling parameters may be affected
by hardware performance of the video display device 100 and
processing performance of the server, and an amount of transmitted
data may be adjusted according to CPU performance and memory
capacity of the video display device 100.
[0617] Moreover, in the case of the audio sample, the sampling
parameters may include the number of bits per sample, a sampling
frequency and a frequency band, the number of channels, a sampling
time, and a compression format.
[0618] For example, the number of bits per sample is the number of
bits applied to one audio sample such as 16 bits or 32 bits, and
the sampling frequency may be 4,4100 Hz, 4,800 Hz or 14,000 Hz as a
frequency when the audio sample is sampled
[0619] Additionally, the number of audio channels is a mono 1
channel, a stereo 2 channel, or a 5.1 channel. The sampling
frequency band is a frequency area used for extracting the audio
sample may include a low frequency region (about 20 Hz to about
1000 Hz), a human voice region (about 200 to about 2000 Hz), a
middle band of about 10000 Hz, and a high frequency region of about
20000 Hz.
[0620] In more detail, a frequency band used according to a content
recognizing manner may vary. That is, entire bands or some bands
may be used, and various bands may be used together.
[0621] Moreover, the video display device 100 may transmit the
audio sample to the server without or with compression, and when
the audio sample is transmitted with compression, information (for
example, mp3, mpeg2-ts, and wmv) on the compression file format is
determined in negotiation with the server.
[0622] Hereinafter, referring to FIGS. 70 to 75, a method of
determining the sampling parameter as the video display device 100
negotiates with the server will be described according to
embodiments.
[0623] Referring to FIG. 70, the video display device 100 transmits
a plurality of sampling parameter values that the video display
device 100 supports to the ACR server 27 in operation S2401.
[0624] For example, the video display device 100 may transmit a
query including at least one value that it may support to each of
the sampling parameters to the ACR server 27, as described with
reference to FIGS. 67 to 69.
[0625] Referring to FIG. 71, in the case of an uncompressed audio
sample, the video display device 100 may transmit to the ACR server
27 information on the number of bits per sampling that it supports
such as 16 bits and 32 bits, a supportable sampling frequency such
as 44100 Hz and 48000 Hz, the number of supportable channels such
as mono and stereo.
[0626] Moreover, the ACR server 27 selects one of the parameter
values from the video display device 100 according to its hardware
performance in operation S2402, and transmits the selected
parameter value to the video display device 100 in operation
S2403.
[0627] When the query in FIG. 71 is received from the video display
device 100, the ACR server 27 selects one of the parameter values
supported by the video display device 100 as shown in FIG. 72, and
then transmits the selected on in addition to the sampling time
information as a reply to the video display device 100.
[0628] According to a negotiation process in operation S2401 to
operation S2403, the video display device 100 sets the sampling
parameters by using the values selected by the ACR server 27.
[0629] Then, the video display device 100 generates a sample by
sampling the AV content according to the set sampling parameters,
and transmits the generated sample to the ACR server in operation
S2404 and operation S2406. The ACR server 27 transmits content
identification information on the AV content to the video display
device 100 by using the transmitted sample in operation S2405 and
operation S2407.
[0630] For example, the ACR server 27 extracts a pattern of feature
information (signature) from the sample transmitted from the video
display device 100, and transmits a result matching to the pattern
to the video display device 100.
[0631] Moreover, the matched result in the ACR server 27 may be the
query result as shown in FIG. 7, and for example, may include
content identification information (Content ID) and time
information (timestamp).
[0632] In the case of a compressed video sample, the video display
device 100 transmits a query including information as shown in FIG.
73 to the ACR server 27, and then, receives a relay including
information as shown in FIG. 74 from the ACR server 27 to set the
sampling parameter.
[0633] Moreover, referring to FIG. 75, during a negotiation process
between the video display device and the ACR server 27, when the
video display device 100 requests an ACR session connection to the
ACR server 27 in operation S2501, the ACR server 27 transmits the
supportable parameter values to the video display device in
operation S2502. The video display device 100 may select one of the
values that the ACR server 27 supports to the ACR server 27 in
operation S2503.
[0634] FIG. 76 is a block diagram illustrating a configuration of a
video display device 100 for sampling an AV content according to
the set parameter. The video display device 100 includes a
receiving unit 191, a sampling unit 192, a parameter setting unit
193, and a data transmitting/receiving unit 194.
[0635] Referring to FIG. 76, the parameter setting unit 193 may set
at least one sampling parameter for extracting some samples from
the AV content by using the method described with reference to
FIGS. 67 to 75.
[0636] Moreover, the sampling unit 192 may sample the received AV
content from the receiving unit 191 according to the setting
parameter, and then, obtain a sample.
[0637] Additionally, the data transmitting/receiving unit 194
transmits the obtained sample to the ACR server 27, and then
receives content identification information on the received AV
content from the ACR server 27.
[0638] FIG. 77 is a block diagram illustrating a configuration of
an ACR server 27 for identifying a content by using a sample
received from a video display device. The ACR server 27 includes a
data transmitting/receiving unit 301, a pattern extracting unit
302, a pattern matching unit 303, and a database 304.
[0639] Referring to FIG. 77, the pattern extracting unit 302 may
extract a pattern (for example, a signature of a bit pattern) of
feature information from a sample received from the video display
device 100 through the data transmitting/receiving unit 301,
according to the set sampling parameter.
[0640] Moreover, the pattern matching unit 303 may search the
database 304 by using the extracted pattern, and may obtain a query
result including a matched result such as content identification
information (Content ID) and time information (timestamp).
[0641] Structures of video display devices according to various
embodiments of the present invention will be described referring to
FIG. 78 and FIG. 79.
[0642] FIG. 78 is a block diagram illustrating a structure of a
fingerprint-based video display device according to another
embodiment.
[0643] As shown in FIG. 78, a tuner 501 extracts a symbol from an
8-VSB RF signal transmitted through an air channel.
[0644] An 8-VSB demodulator 503 demodulates the 8-VSB symbol that
the tuner 501 extracts and restores meaningful digital data.
[0645] A VSB decoder 505 decodes the digital data that the 8-VSB
demodulator 503 to restore an ATSC main service and ATSC M/H
service.
[0646] An MPEG-2 TP Demux 507 filters a Transport Packet that the
video display device 100 is to process from an MPEG-2 Transport
Packet transmitted through an 8-VSB signal or an MPEG-2 Transport
Packet stored in a PVR Storage to relay the filtered Transport
Packet into a processing module.
[0647] A PES decoder 539 buffers and restores a Packetized
Elementary Stream transmitted through an MPEG-2 Transport
Stream.
[0648] A PSI/PSIP decoder 541 buffers and analyzes PSI/PSIP Section
Data transmitted through an MPEG-2 Transport Stream. The analyzed
PSI/PSIP data are collected by a Service Manager (not shown), and
then, is stored in DB in a form of Service Map and Guide data.
[0649] A DSMCC Section Buffer/Handler 511 buffers and processes
DSMCC Section Data for file transmission through MPEG-2 TP and IP
Datagram encapsulation.
[0650] An IP/UDP Datagram Buffer/Header Parser 513 buffers and
restores IP Datagram, which is encapsulated through DSMCC
Addressable section and transmitted through MPEG-2 TP to analyze
the Header of each Datagram. Additionally, an IP/UDP Datagram
Buffer/Header Parser 513 buffers and restores UDP Datagram
transmitted through IP Datagram, and then analyzes and processes
the restored UDP Header.
[0651] A Stream component handler 557 may include ES
Buffer/Handler, PCR Handler, STC module, Descrambler, CA Stream
Buffer/Handler, and Service Signaling Section Buffer/Handler.
[0652] The ES Buffer/Handler buffers and restores an Elementary
Stream such as Video and Audio data transmitted in a PES form to
deliver it to a proper A/V Decoder.
[0653] The PCR Handler processes Program Clock Reference (PCR) Data
used for Time synchronization of Audio and Video Stream.
[0654] The STC module corrects Clock values of the A/V decoders by
using a Reference Clock value received through PCR Handler to
perform Time Synchronization.
[0655] When scrambling is applied to the received IP Datagram, the
Descrambler restores data of Payload by using Encryption key
delivered from the CA Stream Handler.
[0656] The CA Stream Buffer/Handler buffers and processes Data such
as Key values for Descrambling of EMM and ECM, which are
transmitted for a Conditional Access function through MPEG-2 TS or
IP Stream. An output of the CA Stream Buffer/Handler is delivered
to the Descrambler, and then, the descrambler descrambles MPEG-2 TP
or IP Datagram, which carriers A/V Data and File Data.
[0657] The Service Signaling Section Buffer/Handler buffers,
restores, and analyzes NRT Service Signaling Channel Section Data
transmitted in a form of IP Datagram. The Service Manager (not
shown) collects the analyzed NRT Service Signaling Channel Section
data and stores them in DB in a form of Service Map and Guide
data.
[0658] The A/V Decoder 561 decodes the Audio/Video data received
through an ES Handler to present them to a user.
[0659] An MPEG-2 Service Demux (not shown) may include an MPEG-2 TP
Buffer/Parser, a Descrambler, and a PVR Storage module.
[0660] An MPEG-2 TP Buffer/Parser (not shown) buffers and restores
an MPEG-2 Transport Packet transmitted through an 8-VSB signal, and
also detects and processes a Transport Packet Header.
[0661] The Descrambler restores the data of Payload by using an
Encryption key, which is delivered from the CA Stream Handler, on
the Scramble applied Packet payload in the MPEG-2 TP.
[0662] The PVR Storage module stores an MPEG-2 TP received through
an 8-VSB signal at the user's request and outputs an MPEG-2 TP at
the user's request. The PVR storage module may be controlled by the
PVR manager (not shown).
[0663] The File Handler 551 may include an ALC/LCT Buffer/Parser,
an FDT Handler, an XML Parser, a File Reconstruction Buffer, a
Decompressor, a File Decoder, and a File Storage.
[0664] The ALC/LCT Buffer/Parser buffers and restores ALC/LCT data
transmitted through a UDP/IP Stream, and analyzes a Header and
Header extension of ALC/LCT. The ALC/LCT Buffer/Parser may be
controlled by an NRT Service Manager (not shown).
[0665] The FDT Handler analyzes and processes a File Description
Table of FLUTE protocol transmitted through an ALC/LCT session. The
FDT Handler may be controlled by an NRT Service Manager (not
shown).
[0666] The XML Parser analyzes an XML Document transmitted through
an ALC/LCT session, and then, delivers the analyzed data to a
proper module such as an FDT Handler and an SG Handler.
[0667] The File Reconstruction Buffer restores a file transmitted
through an ALC/LCT, FLUTE session.
[0668] If a file transmitted through an ALC/LCT and FLUTE session
is compressed, the Decompressor performs a process to decompress
the file.
[0669] The File Decoder decodes a file restored in the File
Reconstruction Buffer, a file decompressed in the decompressor, or
a film extracted from the File Storage.
[0670] The File Storage stores or extracts a restored file if
necessary.
[0671] The M/W Engine (not shown) processes data such as a file,
which is not an A/V Stream transmitted through DSMCC Section and IP
Datagram. The M/W Engine delivers the processed data to a
Presentation Manager module.
[0672] The SG Handler (not shown) collects and analyzes Service
Guide data transmitted in an XML Document form, and then, delivers
them to the EPG Manager.
[0673] The Service Manager (not shown) collects and analyzes
PSI/PSIP Data transmitted through an MPEG-2 Transport Stream and
Service Signaling Section Data transmitted through an IP Stream, so
as to produce a Service Map. The Service Manager (not shown) stores
the produced service map in a Service Map & Guide Database, and
controls an access to a Service that a user wants. The Service
Manager is controlled by the Operation Controller (not shown), and
controls the Tuner 501, the MPEG-2 TP Demux 507, and the IP
Datagram Buffer/Handler 513.
[0674] The NRT Service Manager (not shown) performs an overall
management on the NRT service transmitted in an object/file form
through a FLUTE session. The NRT Service Manager (not shown) may
control the FDT Handler and File Storage.
[0675] The Application Manager (not shown) performs overall
management on Application data transmitted in a form of object and
file.
[0676] The UI Manager (not shown) delivers a user input to an
Operation Controller through a User Interface, and starts a process
for a service that a user requests.
[0677] The Operation Controller (not shown) processes a command of
a user, which is received through a UI Manager, and allows a
Manager of a necessary module to perform a corresponding
action.
[0678] The Fingerprint Extractor 565 extracts fingerprint feature
information from an AV stream.
[0679] The Fingerprint Comparator 567 compares the feature
information extracted by the Fingerprint Extractor with a Reference
fingerprint to find an identical content. The Fingerprint
Comparator 567 may use a Reference fingerprint DB stored in local
and may query a Fingerprint query server on the internet to receive
a result. The matched result data obtained by a comparison result
may be delivered to Application and used.
[0680] As an ACR function managing module or an application module
providing an enhanced service on the basis of ACR, the Application
569 identifies a broadcast content in watching to provide an
enhanced service related to it.
[0681] FIG. 79 is a block diagram illustrating a structure of a
watermark-based video display device according to another
embodiment.
[0682] Although the watermark-based video display device of FIG. 79
is similar to the fingerprint-based video display device of FIG.
78, the fingerprint-based video display device does not includes
the Fingerprint Extractor 565 and the Fingerprint Comparator 567,
but further includes the Watermark Extractor 566.
[0683] The Watermark Extractor 566 extracts data inserted in a
watermark form from an Audio/Video stream. The extracted data may
be delivered to an Application and may be used.
[0684] Moreover, the above methods of the present invention can
also be embodied as computer readable codes on a computer readable
recording medium. Examples of the computer readable recording
medium include read-only memory (ROM), random-access memory (RAM),
CD-ROMs, magnetic tapes, floppy disks, optical data storage
devices, and carrier waves (such as data transmission through the
Internet).
[0685] The configurations and methods of the above-described
embodiments are applied to the video display device without any
restriction, and all or some of the embodiments may be selectively
combined to have various modifications.
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