U.S. patent number RE43,609 [Application Number 12/654,826] was granted by the patent office on 2012-08-28 for methods and apparatuses for recording information on and reproducing information from a recording medium and the recording medium.
This patent grant is currently assigned to LG Electronics, Inc.. Invention is credited to Byung-Jin Kim, Kang-Soo Seo, Jea-Yong Yoo.
United States Patent |
RE43,609 |
Kim , et al. |
August 28, 2012 |
Methods and apparatuses for recording information on and
reproducing information from a recording medium and the recording
medium
Abstract
.[.The present invention relates to method for recording program
specific information (PSI) for a recorded data stream in an optical
disk such as a high-density digital versatile disk (HD-DVD) and
providing the recorded PSI to a presenting device such as a digital
television. This method writes program or stream specific
information in a management data recording area of a high-density
disk, and when the recorded data stream is reproduced, determines
whether it is time to send the stream specific information, obtains
stream specific information corresponding to a stream object being
reproduced, or to be reproduced based on the determination result,
and transmits the obtained stream specific information. This method
can maintain the disk storage capacity for real video and/or audio
data by recording stream specific information in a management
recording area of a high-density disk, and provide the stream
specific information to a digital television promptly when it is
necessary, thereby reducing the time duration of blank screen or
discontinuity in video and/or audio presentation..]. .Iadd.The
methods and apparatuses record information on or reproduce
information from a recording medium. The information includes at
least video information and presentation control information for
managing presentation of the video information. The presentation
control information includes change information for the video
information, and the change information indicates a point in the
video information where at least a portion of the presentation
control information for the video information changes..Iaddend.
Inventors: |
Kim; Byung-Jin (Kyunggi-do,
KR), Seo; Kang-Soo (Kyunggi-do, KR), Yoo;
Jea-Yong (Seoul, KR) |
Assignee: |
LG Electronics, Inc. (Seoul,
KR)
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Family
ID: |
19617730 |
Appl.
No.: |
12/654,826 |
Filed: |
January 5, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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10973099 |
Oct 26, 2004 |
Re. 41090 |
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Reissue of: |
09688241 |
Oct 16, 2000 |
6473379 |
Oct 29, 2002 |
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Foreign Application Priority Data
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Oct 29, 1999 [KR] |
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99-47610 |
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Current U.S.
Class: |
369/59.1;
369/59.23; 369/47.1 |
Current CPC
Class: |
H04N
9/8042 (20130101); H04N 9/8205 (20130101); H04N
5/85 (20130101); H04N 5/775 (20130101); G11B
7/007 (20130101) |
Current International
Class: |
G11B
7/00 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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0911830 |
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Apr 1999 |
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EP |
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0738078 |
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Aug 1999 |
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EP |
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10-1997-7004213 |
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Aug 1997 |
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KR |
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WO 96/32720 |
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Oct 1996 |
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WO |
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Other References
Korean Office Action dated Jun. 27, 2002. cited by other .
Korean Office Action dated Feb. 10, 2003. cited by other.
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Primary Examiner: Edun; Muhammad N
Attorney, Agent or Firm: Harness, Dickey & Pierce,
PLC
Parent Case Text
.Iadd.DIVISIONAL REISSUE APPLICATIONS.Iaddend.
.Iadd.Notice: A reissue application has been filed previously for
the reissue of U.S. Pat. No. 6,473,379. The previously filed
reissue application is application Ser. No.
10/973,099..Iaddend.
.Iadd.DOMESTIC PRIORITY INFORMATION.Iaddend.
.Iadd.This is a direct divisional of application Ser. No.
10/973,099, filed Oct. 26, 2004 now U.S. Pat. No. Re. 41,090; the
entire contents of which are hereby incorporated by
reference..Iaddend.
Claims
What is claimed is:
.[.1. A method of recording stream specific information along with
data stream in a disk, comprising the steps of: separating program
specific information contained in a received broadcast signal from
the broadcast signal; converting the separated program specific
information into stream specific information and processing the
stream specific information into a digital stream compatible with a
recording format; comparing the separated stream specific
information with previous stream specific information to determine
whether if contains data that is different from the previous stream
specific information; checking whether stream specific information
is the same or needs to be changed while recording the data stream
in the disk; generating stream specific information corresponding
to the data stream being recorded based on a result obtained from
said checking; and writing the generated stream specific
information and additional information linking the stream specific
information with a stream object..].
.[.2. The method set forth in claim 1, wherein the additional
information consists of start and/or end position data of a
corresponding stream object..].
.[.3. The method set forth in claim 1, wherein the stream specific
information is written in the same packetized format that the data
stream is written in..].
.[.4. The method set forth in claim 1, wherein the data stream is
grouped into a single stream object if it is determined that the
stream specific information needs to be changed..].
.[.5. The method set forth in claim 1, wherein the stream specific
information is written in a management information recording area
where presentation control information of the data stream is to be
written..].
.[.6. A method of providing data stream and stream specific
information recorded in a disk, comprising the steps of: (a)
determining whether it is time to send stream specific information;
(b) obtaining stream specific information corresponding to a stream
object being reproduced or to be reproduced based on the result
obtained from determining in (a); and (c) transmitting the obtained
stream specific information..].
.[.7. The method set forth in claim 6, wherein a stream object
contains stream specific information, wherein the stream specific
information for one object differs from the stream specific
information of another object..].
.[.8. The method set forth in claim 6, wherein said step (b)
searches for stream specific information corresponding to a stream
object based on additional information appended to each stream
specific information, the additional information having data to
link stream specific information with a stream object..].
.[.9. The method set forth in claim 8, wherein the additional
information has start and/or end position data of a corresponding
stream object..].
.[.10. The method set forth in claim 6, wherein the stream specific
information has been written in a management information recording
area where presentation control information of a data stream has
been written..].
.[.11. The method set forth in claim 6, wherein said step (a)
determines that it is time to send the stream specific information
when a current reproduction position on the disk is moved..].
.[.12. The method set forth in claim 6, wherein said step (a)
determines that it is time to send the stream specific information
when a connected device receiving a reproduced data stream is
turned on..].
.[.13. The method set forth in claim 6, wherein said step (a)
determines that it is time to send the stream specific information
when a data stream belonging to a new stream object starts to be
reproduced..].
.[.14. The method set forth in claim 6, wherein said step (a)
determines that it is time to send the stream specific information
when a digital bus connected to a device receiving the reproduced
data stream is reset..].
.[.15. The method set forth in claim 6, wherein said step (a)
determines that it is time to send the stream specific information
when the viewing channel of the connected device receiving the
reproduced data stream is changed..].
.[.16. The method set forth in claim 6, wherein said step (c)
transmits the obtained stream specific information more than once
before sending a reproduced real video and/or audio data
stream..].
.[.17. The method set forth in claim 6, wherein data packets
delivering the stream specific information contain time reference
information to be used for data presentation timing in a connected
device receiving a reproduced data stream..].
.[.18. A disk device comprising divided recording areas, one being
a data area where a digital stream of video and/or audio data is
written, the other being a management information area where stream
specific information for controlling the reproduction and
presentation of the data written in said data area are written,
wherein the stream specific information is associated with each
stream object which is a grouping unit of the written digital
stream..].
.[.19. The disk device as set forth in claim 18, wherein the stream
specific information is associated with each stream object by
linking information appended to each stream specific information,
the linking information being indicative of a start and/or end
position of an associated stream object..].
.Iadd.20. A tangible recording medium storing a data structure for
managing presentation of at least video data recorded on the
recording medium, comprising: video information including at least
the video data; and management information including presentation
control information for managing presentation of the video
information, wherein the presentation control information includes
change information for the video information, the change
information indicating a point in the video information where at
least a portion of the presentation control information for the
video information changes..Iaddend.
.Iadd.21. The tangible recording medium of claim 20, wherein the
change information indicates a time in the video information where
at least a portion of the presentation control information for the
video information changes..Iaddend.
.Iadd.22. The tangible recording medium of claim 20, wherein the
video information is packetized..Iaddend.
.Iadd.23. The tangible recording medium of claim 22, wherein the
presentation control information is packetized..Iaddend.
.Iadd.24. The tangible recording medium of claim 20, wherein the
tangible recording medium is an optical disc..Iaddend.
.Iadd.25. A method of recording information for managing
presentation of video information on a recording medium,
comprising: checking at least a portion of presentation control
information for one or more changes in the presentation control
information, the presentation control information being for
managing presentation of the video information; generating change
information indicating a point in the video information where at
least a portion of the presentation control information for the
video information changes; and recording at least the video
information and the presentation control information corresponding
to the video information on the recording medium, the presentation
control information including the change information..Iaddend.
.Iadd.26. The method of claim 25, wherein the change information
indicates a time in the video information where at least a portion
of the presentation control information for the video information
changes..Iaddend.
.Iadd.27. The method of claim 25, wherein the video information is
packetized..Iaddend.
.Iadd.28. The method of claim 27, wherein the presentation control
information is packetized..Iaddend.
.Iadd.29. The method of claim 25, wherein the recording medium is
an optical disc..Iaddend.
.Iadd.30. A apparatus for recording information for managing
presentation of video information on a recording medium,
comprising: a recording unit configured to record information on
the recording medium; and a controller, operably coupled to the
recoding unit, configured to control the recording unit to check at
least a portion of presentation control information for one or more
changes in the presentation control information, the presentation
control information being for managing presentation of the video
information, generate change information indicating a point in the
video information where at least a portion of the presentation
control information for the video information changes, and record
at least the video information and the presentation control
information corresponding to the video information on the recording
medium, the presentation control information including the change
information..Iaddend.
.Iadd.31. The apparatus of claim 30, wherein the change information
indicates a time in the video information where at least a portion
of the presentation control information for the video information
changes..Iaddend.
.Iadd.32. The apparatus of claim 30, wherein the video information
is packetized..Iaddend.
.Iadd.33. The apparatus of claim 32, wherein the presentation
control information is packetized..Iaddend.
.Iadd.34. The apparatus of claim 30, wherein the recording medium
is an optical disc and the recording unit includes an optical
pick-up..Iaddend.
.Iadd.35. A method of reproducing information on a recording
medium, comprising: reproducing video information from the
recording medium; reproducing presentation control information from
the recording medium, the presentation control information being
for managing presentation of the video information, the
presentation control information including change information for
the video information, the change information indicating a point in
the video information where at least a portion of the presentation
control information for the video information changes..Iaddend.
.Iadd.36. The method of claim 35, wherein the change information
indicates a time in the video information where at least a portion
of the presentation control information for the video information
changes..Iaddend.
.Iadd.37. The method of claim 35, wherein the video information is
packetized..Iaddend.
.Iadd.38. The method of claim 37, wherein the presentation control
information is packetized..Iaddend.
.Iadd.39. The method of claim 35, wherein the recording medium is
an optical disc..Iaddend.
.Iadd.40. An apparatus for reproducing information on a recording
medium, comprising: a reproducing unit configured to reproduce
information recorded on the recoding medium; a controller, operably
coupled to the reproducing unit, configured to control the
reproducing unit to reproduce at least video information and
presentation control information for managing presentation of the
video information, the presentation control information including
change information for the video information, the change
information indicating a point in the video information where at
least a portion of the presentation control information for the
video information changes..Iaddend.
.Iadd.41. The apparatus of claim 40, wherein the change information
indicates a time in the video information where at least a portion
of the presentation control information for the video information
changes..Iaddend.
.Iadd.42. The apparatus of claim 40, wherein the video information
is packetized..Iaddend.
.Iadd.43. The apparatus of claim 42, wherein the presentation
control information is packetized..Iaddend.
.Iadd.44. The apparatus of claim 40, wherein the recording medium
is an optical disc and the reproducing unit includes an optical
pick-up..Iaddend.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
.[.The present invention relates to an optical disk and method for
recording program or stream specific information (PSI or SSI) for
recorded data stream in an optical disk such as a high-density
digital versatile disk (HD-DVD) and providing the recorded PSI or
SSI to a presenting device such as a digital television..].
.Iadd.The present invention relates to methods for recording and
reproducing presentation control information from a recording
medium such as an optical disc (e.g., an HD-DVD), and also to
apparatuses for recording and reproducing as well as the recording
medium..Iaddend.
2. Description of the Related Art
A digital television which can receive digital broadcast programs
and present them as high-quality picture and sound is being
popularized. The digital broadcast signal to be processed in the
digital television contains PSI for various programs and data
presentation control as well as a digital video and audio signal.
It is specified that the PSI should be intermittently inserted in
the data stream of the digital broadcast signal.
Therefore, the digital television interprets the PSI received
intermittently, and selects a program contained in the data stream
and decodes data belonging to the selected program based on the PSI
interpretation.
In the meantime, a disk device which is being developed to
reproduce a high-density digital versatile disk (HD-DVD) whose
recording standard is under discussion, is expected to be connected
with a digital television as shown FIG. 1 through IEEE 1394
standard. The digital television 500 still requires PSI to select a
program and to control data presentation when receiving and
presenting the data stream from the disk device 100.
Therefore, when reproducing MPEG-formatted data stream recorded in
a HD-DVD and sending it to the digital television 500 connected
through a digital interface such as IEEE 1394 standard, the disk
device 100 should provide PSI, which consists of a program
association table (PAT), a program map table (PMT), a conditional
access table (CAT), and so on as shown in FIG. 2, to the digital
television 500 in the format of a transport stream (TS) consisting
of 188-byte-long transport packets (TPs).
To provide PSI for a recorded data stream to the digital
television, which is connected through a digital interface such as
IEEE 1394 standard, intermittently and periodically as in a digital
broadcast signal, it may be considered that PSI is recorded
dispersedly and repeatedly in a data recording area `AREA 1` of a
HD-DVD as shown in FIG. 3, and it is retrieved and transmitted
sequentially along with the data stream.
However, if PSI is recorded dispersedly and repeatedly in a data
recording area of a disk, the recording area for real data, that
is, video and/or audio data is greatly reduced, which causes a
decrease in the recording efficiency of a disk.
In addition, the digital television must wait to receive one in a
regular sequence among the PSI recorded dispersedly in the data
recording area to present a received data stream even though data
receiving has been resumed after a reproduction point is moved
according to a key command of a user, or the digital interface such
as IEEE 1394 standard is reset. Since the digital television can
not select a data stream to decode into real picture and/or sound
until the PSI for the data stream is received, there is inevitably
discontinuity in video and/or audio or blank screen for a duration
of time.
SUMMARY OF THE INVENTION
.[.It is an object of the present invention to provide an optical
disk containing PSI in its management recording area and a method
for recording PSI in an optical disk and providing the recorded PSI
to a digital television, which records PSI for the recorded data
stream in a specific area where management information for the
recorded real data is written and, if it is time to send PSI,
searches and reads PSI written in the specific area and sends it to
a digital television..].
.[.A method of recording stream specific information along with a
data stream in a disk according to the present invention, checks
whether stream specific information needs to be changed while
recording the data stream in the disk, generates stream specific
information corresponding to the data stream being recorded based
on the checked result, and writes the generated stream specific
information and an additional information, the additional
information consisting of start and/or end position data of a
related stream object, to link the stream specific information with
a stream object..].
.[.A method of providing data stream and stream specific
information recorded in a disk according to the present invention,
determines whether it is the time to send stream specific
information, obtains stream specific information related with a
stream object being reproduced or to be reproduced based on the
determination result, and transmits the obtained stream specific
information, wherein the stream objects have different contents of
stream specific information differing from each other..]. .Iadd.In
one embodiment, the present invention provides an optical disk
containing PSI in its management recording area and a method for
recording PSI in an optical disk and providing the recorded PSI to
a digital television. The PSI for the recorded data stream may be
recorded in a specific area where management information for the
recorded real data is written. If it is time to send PSI, the PSI
written in the specific area is searched, read and sent to a
digital television..Iaddend.
.Iadd.In one embodiment, a method of recording stream specific
information along with a data stream in a disk according to the
present invention, determines whether stream specific information
needs to be changed while recording the data stream in the disk,
generates stream specific information corresponding to the data
stream being recorded based on the determination, and writes the
generated stream specific information and additional information.
The additional information may consist of start and/or end position
data of a related stream object, to link the stream specific
information with a stream object..Iaddend.
.Iadd.In another embodiment, a method of providing data stream and
stream specific information recorded in a disk according to the
present invention, determines whether it is the time to send stream
specific information, obtains stream specific information related
with a stream object being reproduced or to be reproduced based on
the determination result, and transmits the obtained stream
specific information. Here, the stream objects may have stream
specific information differing from each other..Iaddend.
.Iadd.In a further embodiment of the present invention, an
apparatus for recording information on a recording medium includes
a pick-up for writing information on the recording medium, and a
controller controlling the information supplied to the pick-up. The
information includes at least video information and presentation
control information for managing presentation of the video
information. The presentation control information includes change
information for the video information, and the change information
indicates a point in the video information where at least a portion
of the presentation control information for the video information
changes..Iaddend.
.Iadd.In one embodiment, the change information indicates a time in
the video information where at least a portion of the presentation
control information for the video information changes.
.Iaddend.
.Iadd.In another embodiment of the present invention, an apparatus
for reproducing information on a recording medium includes a
pick-up for reproducing information from the recording medium. The
information includes at least video information and presentation
control information for managing presentation of the video
information. The presentation control information includes change
information for the video information, and the change information
indicates a point in the video information where at least a portion
of the presentation control information for the video information
changes. Here, the change information may indicate a time in the
video information where at least a portion of the presentation
control information for the video information changes.
.Iaddend.
.Iadd.In yet another embodiment of the present invention, a method
of reproducing information on a recording medium includes
reproducing information from the recording medium. The information
includes at least video information and presentation control
information for managing presentation of the video information. The
presentation control information includes change information for
the video information, and the change information indicates a point
in the video information where at least a portion of the
presentation control information for the video information changes.
The change information may indicate a time in the video information
where at least a portion of the presentation control information
for the video information changes. .Iaddend.
.Iadd.A further embodiment of the present invention, provides a
method of supplying information for recording on a recording
medium. The supplied information includes at least video
information and presentation control information for managing
presentation of the video information. The presentation control
information includes change information for the video information,
and the change information indicates a point in the video
information where at least a portion of the presentation control
information for the video information changes. Here, the change
information may indicate a time in the video information where at
least a portion of the presentation control information for the
video information changes. .Iaddend.
.Iadd.A still further embodiment of the present invention provides
a recording medium having a data structure for managing at least
video data recorded on the recording medium. The recording medium
includes a recording area storing at least video information and
presentation control information for managing presentation of the
video information. The presentation control information includes
change information for the video information, and the change
information indicates a point in the video information where at
least a portion of the presentation control information for the
video information changes. The change information may indicate a
time in the video information where at least a portion of the
presentation control information for the video information
changes..Iaddend.
BRIEF DESCRIPTION OF THE DRAWINGS
.[.The accompanying drawings, which are included to provide a
further understanding of the invention, illustrate the preferred
embodiments of the invention, and together with the description,
serve to explain the principles of the present invention..].
.Iadd.The accompanying drawings, which are included to provide a
further understanding of the invention, illustrate the exemplary
embodiments of the invention, and together with the description,
serve to explain the principles of the present
invention..Iaddend.
In the drawings:
FIG. 1 shows a digital television and a high-density disk
reproducing device which are connected each other;
FIG. 2 shows partial contents of program specific information;
FIG. 3 shows partitioned recording areas and contents to be
recorded thereon;
FIG. 4 is a block diagram of a disk device to which a data stream
recording method according to the present invention is applied;
FIG. 5 shows partitioned recording areas and contents to be
recorded thereon according to the present invention;
FIG. 6 is a block diagram of a disk device to which a data stream
reproducing method according to the present invention is
applied;
FIG. 7 shows a flow diagram of method for providing stream specific
information according to the present invention; and
FIG. 8 shows an example of when to transmit stream specific
information.
.[.DETAILED DESCRIPTION OF THE PREFFERRED EMBODIMENTS.].
.Iadd.DETAILED DESCRIPTION OF THE EMBODIMENTS.Iaddend.
.[.In order that the invention may be fully understood, preferred
embodiments thereof will now be described with reference to the
accompanying drawings..]. .Iadd.In order that the invention may be
fully understood, exemplary embodiments thereof will now be
described with reference to the accompanying drawings..Iaddend.
FIG. 4 is a partial block diagram of a disk device, which a
PSI-recording method according to the present invention is applied
to, for recording data in a high density disk.
The disk device of FIG. 4 comprises a PSI separator 21 separating
PSI contained in the received broadcast signal; a signal processor
22 processing the received digital broadcast signal, which the PSI
is separated from, into a digital stream compatible with a
recording format; a PSI processor 23 processing the separated PSI
into a digital stream compatible with a recording format; a signal
selector 24 selecting one of either the broadcast digital stream
and the PSI stream; a pickup 27 writing the stream selected by the
signal selector 24 in a high-density disk 28; a microcomputer 25
controlling the overall recording operation; and a memory 26 for
storing data necessary for control operation of the microcomputer
25.
The recording operation of the disk device 200 configured as above
is described in detail.
The PSI separator 21 detects PSI, which consists of PAT, PMT, CAT,
and so on as explained above referring to FIG. 2, contained
intermittently in digital broadcast signal, and separates it from
the received digital broadcast signal. The PSI processor 23
processes the separated PSI into a digital stream compatible with
the recording format of a high-density rewritable digital versatile
disk (HD-DVD RAM), and the microcomputer 25 compares the separated
PSI with PSI detected previously to determine whether the separated
PSI is new, that is, the separated PSI contains data which is
different from the data of the previous PSI. If the separated PSI
is new, it is written in the high-density disk 28 under control of
the microcomputer 25 after being processed by the PSI processor
23.
When the PSI is processed by the PSI processor 23, control
information may be appended to the PSI or the PSI is modified for
various presentation appropriate for a data stream reproduced from
a disk device. The modified PSI or control information appended PSI
is called stream specific information (SSI).
The recording area where the PSI is written is a management
information recording area where navigation data is written. The
navigation data is used for controlling reproduction and
presentation of recorded broadcast data containing a video and/or
audio data stream processed by the signal processor 22. When
writing PSI (or SSI), the micro-computer 25 generates linking
information between the written PSI (or SSI) and a stream object,
and appends the generated linking information to the written PSI
(or SSI). A stream object corresponds to a single program or a
digital stream recorded from recording start to stop, and the
linking information consists of start and end time of each stream
object.
All of the PSI (or SSI) including the linking information for
stream objects, each stream object having different specific
information for its own data stream, is written in the management
information recording area.
In the meantime, the high-density disk 28 has two partitioned
recording areas `AREA 1` and `AREA 2` as shown in FIG. 5, the one
`AREA 1` being for real data such as video and/or audio data which
is grouped by stream object, the other `AREA 2` being for
management information such as navigation data which is used for
controlling reproduction and presentation of recorded stream
objects. As explained above, the detected PSI, which will be
transmitted to a digital television connected through a digital
interface such as IEEE 1394 to select a data stream from the disk
device and to decode the selected stream, is also written in the
management information recording area `AREA 2`.
Since PSI (or SSI) is written in the management information
recording area `AREA 2`, the storage capacity of the data recording
area `AREA 1` is not reduced.
From now on, a method of reproducing a data stream and specific
information from the disk having PSI (or SSI) written only in the
management information recording area `AREA 2` and providing them
to a digital television will be described.
FIG. 6 is a block diagram of a disk device to conduct the method of
reproducing and providing data stream and specific information
according to the present invention.
The disk device 300 shown in FIG. 6 comprises an optical pickup 32
detecting recorded signals of a high-density disk 31 having PSI (or
SSI) written in the area `AREA 2`; an analog signal processor 33
processing the electrical signal from the pickup 32 to convert it
into a binary signal; a digital signal processor 34 processing the
binary signal to obtain real data and PSI (or SSI); a TS
multiplexer 35 multiplexing the real data and PSI (or SSI) and
converting the multiplexed data into TS; an interfacing unit 36
transmitting the TS to a digital television 500 connected through
IEEE 1394 standard; a microcomputer 37 supervising the overall
reproduction operation; and a memory 36 for storing data necessary
for control operation of the microcomputer 37.
The microcomputer 37 conducts an operation to provide PSI (or SSI),
which corresponds to the present data stream being reproduced or to
be reproduced, to the digital television 500. To do so, it reads
from the management information recording area `AREA 2` when a key
command directly from a user is entered, a packet command from the
digital television 500 connected through IEEE 1394 standard is
received, or there occurs a bus reset on the IEEE 1394. Then, the
digital television 500 interprets the PSI (or SSI) received through
the IEEE 1394 bus, and selects and decodes a data stream based on
the interpretation of the PSI (or SSI).
FIG. 7 is a flow diagram of sending PSI (or SSI) to a digital
television according to the present invention. The PSI (or SSI)
sending procedure to be conducted by the disk device 300 is
described in detail referring to FIG. 7.
If the disk 31 having PSI (or SSI) written in the management
information recording area is inserted onto a tray (not figured) of
the disk device 300 (S10), the microcomputer 37 moves the pickup 32
to the management information recording area `AREA 2` to read
navigation data and PSI (or SSI), and stores them in the memory 38
(S11).
After that, the microcomputer 37 monitors (S12) the operation mode
of the disk device 300 and the digital television 500 connected
through IEEE 1394 standard as well as whether a bus reset occurs on
the digital interface of IEEE 1394. If the operation mode of the
disk device 300 is reproduction mode (S13) in which a data stream
recorded in the disk is or to be reproduced and transmitted in the
form of TS, the microcomputer 37 checks whether a transmission
operation of TS is first (S14), and if so, it searches the memory
38 for PSI (or SSI) corresponding to a stream object to be
reproduced based on the linking information appended to all of PSI
(or SSI) and applies the adequate PSI (or SSI) to the TS
multiplexer 35 along with the real data stream reproduced from the
data recording area `AREA 1` of the disk 31.
The TS multiplexer 35 multiplexes the PSI (or SSI) and real data
stream while converting them into TS consisting of stream
information packets (SIPs) and data packets, and transmits the
converted TS to the connected digital television 500 through the
interfacing unit 36.
The SIP may be transmitted more than once to prevent .[.from.].
accident loss in .Iadd.the .Iaddend.communication channel before
sending real data packets, and it may contain time reference
information such as program clock reference (PCR) to be used to
synchronize an internal clock beforehand for timing control of data
presentation in the digital television 500.
The SIP may be 188-bytes long as specified for a transport packet
(TP) in digital broadcast standard, and it may be transmitted
repeatedly every 40 msec as shown in FIG. 8.
If a data stream of a new program starts to be transmitted, that
is, a new stream object starts to be reproduced (S15) while a data
stream being reproduced from the high-density disk 31 is being
transmitted in the format of TS, the microcomputer 37 also searches
the memory 38 for PSI (or SSI) corresponding to the new stream
object to be reproduced and applies the appropriate PSI (or SSI) to
the TS multiplexer 35 along with the real data stream belonging to
the new stream object which is reproduced from the data recording
area `AREA 1` of the disk 31.
For example, if the start position information of the (N+1)-th
stream object is detected after the N-th stream object is
completely reproduced as shown in FIG. 8 while reproducing the disk
31, the microcomputer 37 reads the PSI (or SSI) corresponding to
the (N+1)-th stream object from the memory 38 and then applies the
read PSI (or SSI) to the TS multiplexer 35. In other words, the
microcomputer 37 searches for PSI (or SSI) corresponding to each
stream object being provided to the digital television 500 at
present, based on the linking information and applies the found PSI
(or SSI) to the TS multiplexer 35.
Therefore, the TS multiplexer 35 multiplexes the PSI (or SSI) and
real data stream of the present stream object (S20) while
converting them into TS consisting of stream information packets
and data packets, and transmits the converted TS to the connected
digital television 500 through the interfacing unit 36 (S21).
And, if the microcomputer 37 conducts a long jump of the pickup 32
according to a key input from a user (S16), it searches the memory
38 for PSI (or SSI) corresponding to the new or same stream object
to be reproduced after the long jump, and applies the appropriate
PSI (or SSI) to the TS multiplexer 35 along with the real data
stream belonging to the stream object to which the pickup 32 is
moved.
Then, the TS multiplexer 35 multiplexes the PSI (or SSI) and real
data stream while converting them into TS consisting of stream
information packets and data packets (S20), and transmits the
converted TS to the connected digital television 500 through the
interfacing unit 36 (S21).
And, if the digital television 500 connected with the disk device
300 through the IEEE 1394 standard is turned on (S17) or its
viewing channel is changed (S18), a corresponding command is sent
to the microprocessor 37 of the disk device 300 through the digital
interface. At this time, the microcomputer 37 reads PSI (or SSI)
corresponding to a stream object being provided, or to be provided
on request of disk reproduction to the digital television 500, and
applies the appropriate PSI (or SSI) to the TS multiplexer 35 along
with the real data stream, if it is in a reproducing mode at
present.
Then, as explained above, the TS multiplexer 35 multiplexes the PSI
(or SSI) and real data stream, if it is applied, while converting
them into TS consisting of stream information packets and data
packets (S20), and transmits the converted TS to the connected
digital television 500 through the interfacing unit 36 (S21).
Furthermore, if a reset occurs on the IEEE 1394 digital interface
(S19), the microcomputer 37 detects the reset while monitoring the
status of the digital interfacing bus, reads again PSI (or SSI)
corresponding to a stream object being provided, or to be provided
to the digital television 500, and applies the appropriate PSI (or
SSI) to the TS multiplexer 35 along with the real data stream, if
it is in a reproducing mode at present.
Then, the TS multiplexer 35 multiplexes the PSI (or SSI) and real
data stream, if it is applied, while converting them into TS
consisting of stream information packets and data packets (S20),
and transmits the converted TS to the connected digital television
500 through the interfacing unit 36 (S21).
The above-explained operations (S12 to S22) is conducted by the
microcomputer 37 until the disk device 300 is turned off or is
requested to stop.
To be brief, whenever there is a command from a user or the digital
television 500 connected through IEEE 1394, or a reset occurs on
the interface bus, the disk device 300 reads the stored PSI (or
SSI), which was reproduced beforehand from the management
information recording area `AREA 2` of the high-density disk 31,
and then provides the read PSI (or SSI) to the connected digital
television 500, so that the digital television 500 can select and
decode the data stream from the disk device 300 immediately after
the interpretation of the PSI (or SSI) is done.
The method of providing specific information on a data stream
according to the present invention can maintain the disk storage
capacity for real video and/or audio data by recording stream
specific information in a management recording area of a
high-density disk, and provide the stream specific information to a
digital television promptly when it is necessary, thereby reducing
the time duration of blank screen or discontinuity in video and/or
audio presentation.
The invention may be embodied in other specific forms without
departing from the sprit or essential characteristics thereof. The
present embodiments are therefore to be considered in all respects
as illustrative and not restrictive, the scope of the invention
being indicated by the appended claims rather than by the foregoing
description and all changes which come within the meaning and range
of equivalency of the claims are therefore intended to be embraced
therein.
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