JP2009111955A - Stream reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stream reproducing device capable of reproducing a data broadcasting, where output timing information is not imparted, in synchronization with sound and video. <P>SOLUTION: A TS reading processing part 21 reads a transport stream of an indicated program from a storage part 22 for storing the transport streams, and supplies the transport stream to a TS decoding part 12. The TS decoding part 12 separates PES, DSMCC section packets and PSI/SI section packets and PCRs, extracts them, and imparts the PCRs to the DSMCC section packets and PSI/SI section packets. A section stay processing part 701 controls the organization timing of section data through the use of a reference clock to be announced from an AV synthesizing part 91 and the PCRs imparted to the DSMCC section packets and PSI/SI section packets. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stream reproduction apparatus that reproduces a stream in which multimedia data such as video, audio, and data broadcast is multiplexed.

  In recent years, digital broadcasting has become mainstream in television broadcasting. For example, in BS digital broadcasting, CS digital broadcasting, and terrestrial digital broadcasting, a stream in which data broadcasting is multiplexed according to the MPEG2 standard is transmitted in addition to digitized video and audio. The output timing of video and audio is controlled by time information called PTS, and video and audio can be synchronized. In addition, data broadcasting is transmitted in accordance with video and audio transmission timing. For example, synopsis and actor information is transmitted as data broadcast in conjunction with drama video and audio. When switching to a quiz program, transmission of data broadcasts related to the drama is stopped, and instead of transmitting data broadcasts that allow viewers to participate in the quiz, video and audio can be synchronized with the data broadcasts.

  In addition, a form of reproducing such digital broadcast after being recorded in a recording device such as a DVD recorder or an HDD recorder is also actively performed. Patent Document 1 discloses a technique related to stream recording and reproduction according to the MPEG2 standard. More specifically, Patent Document 1 describes a technique of adding a time stamp packet whose information is arrival time at the time of recording to a stream and reading out the stream based on the time information of the time stamp packet at the time of reproduction. Yes. By reading out the data broadcast from the stream in this way at the same timing as when recording, the arrival timing of the data broadcast can be reproduced, and the video and audio can be synchronized with the data broadcast.

  However, in order to realize a method of reading at the same timing as recording at the time of reproduction as in Patent Document 1, a highly accurate timepiece is required. Specifically, the transmission frequency of a crystal oscillator used in a watch changes depending on the temperature. If the temperature at the time of recording is the same as that at the time of reproduction, the frequency is the same, but if the temperature is different, the frequency is different. For this reason, a timepiece using a high-accuracy crystal oscillator in which a change in the transmission frequency is extremely small in a wide temperature range is required, and the cost of the stream recording / reproducing apparatus increases.

  For this reason, an audio master method is used in a stream reproduction device aimed at low cost. The configuration and operation of a stream playback apparatus using the audio master method will be described with reference to FIG.

  In FIG. 6, the storage unit 22 is a recording medium such as an optical disk such as a DVD, an HDD, or a semiconductor memory. The TS read processing unit 21 reads out the transport stream of the designated program from the storage unit 22 in which the transport stream is stored.

  The transport stream read from the storage unit 22 is transmitted from the transport stream to a DSMCC section packet, a PSI / SI section packet, and a packetized elementary stream (hereinafter referred to as a TS decoding unit) 15 by a transport stream decoding unit (hereinafter referred to as a TS decoding unit) 15. (Hereinafter referred to as PES).

  The DSMCC section packet is supplied to the DSMCC section buffer 301. The DSMCC section processing unit 51 converts the DSMCC section data supplied to the DSMCC section buffer 301 into an original BML (Broadcast Markup Language) content file.

  The PSI / SI section packet is supplied to the PSI / SI section buffer 401. The PSI / SI section processing unit 501 extracts information about broadcasts and programs from the PSI / SI section data supplied to the PSI / SI section buffer 401 and supplies the information to the channel selection processing unit 502.

  When the processing speed for reading from the storage unit 22 is faster than the video and audio decoding processing speeds of the video decoder 41 and the audio decoder 42, the video buffer 101 and the audio buffer 201 will eventually become full. When the buffer is full, the TS read processing unit 21 temporarily stops the read processing from the storage unit 22. Thereafter, when the video buffer 101 and the audio buffer 201 are vacated by the decoding process, the TS read processing unit 21 resumes the read process from the storage unit 22.

  The PES is supplied to the PES processing unit 31 and converts the selected PES into an audio stream and a video stream. The audio stream is accumulated in the audio buffer 201. The video stream is accumulated in the video buffer 101.

  The audio decoder 42 decodes a continuous audio stream at the timing supplied to the audio buffer 201, and is converted into a continuous audio signal by the audio output unit 72, so that a smooth sound corresponding to the audio signal is output by a speaker or the like. Audio can be output. The audio output unit 72 notifies the audio decoder 42 of the time information when the audio is output. The audio decoder 42 notifies the AV synchronization unit of the notified time information.

  The AV synchronization unit 91 uses the time information notified from the audio decoder 42 as a reference clock. Further, the AV synchronization unit 91 compares the PTS of the video stream notified from the video decoder 41 and the reference clock, and if the reference clock is larger than the PTS, the AV synchronization unit 91 performs the process from decoding the video stream to outputting the video signal to the outside. A video output trigger is notified to the video decoder 41 earlier by the processing time. The video decoder 41 decodes the video stream at the timing when the video output trigger from the AV synchronization unit 91 is notified, and the video output unit 72 outputs the video.

  By operating only the video output timing as described above, it is possible to keep the audio and video synchronized while maintaining the temporal continuity of the audio even without a high-precision crystal transmitter. .

  The data broadcast engine 52 extracts a BML content file described in BML in the data broadcast, generates data data of the data broadcast, operation data, etc. according to the description code described in the file, and uses the image data, etc. Processing related to the display and operation of data broadcast images.

The video synthesis unit 61 synthesizes the video stream from the video decoder 41 and the image data of the data broadcast from the data broadcast engine 52. The synthesized video stream from the video synthesis unit 61 is converted into a video signal by the video output unit 71, and this video signal is output to the outside as a video output.
JP 2001-268518 A

  However, in recent stream playback apparatuses, for example, devices such as mobile phones, not only the stream playback function but also various functions operate simultaneously. In addition, since many functions in the stream playback device are implemented by software and operate in multitasking, when processing of other functions is heavy, assignment of a CPU (Central Processing Unit) to the stream playback function is not possible. For example, the transport stream read processing from the storage unit 22 is not in time, data supply to the video decoder 41 and the audio decoder 42 is delayed, underflow occurs, and audio and video are interrupted. . Therefore, in order to reproduce audio and video without interruption, very large video buffer 101 and audio buffer 201 are required.

  For this reason, when a stream playback mechanism using a conventional audio master method is introduced and audio, video, and data broadcasting are played back, the audio and video are stored in a very large capacity audio buffer and video buffer. Therefore, the delay increases accordingly. As described above, the audio and video to which the output timing information is added are output synchronously, and there is no problem even if the delay increases. However, a data broadcast to which no output timing information is attached cannot be synchronized with audio or video, and therefore is output without being controlled after being read from the storage unit. Therefore, there is a problem that the data broadcast is switched even though the program has not yet been switched, that is, the display content update is greatly shifted compared to the time of viewing the broadcast (the output timing of the data broadcast is earlier than the video and audio). become.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a stream playback apparatus that can perform synchronized playback of audio, video, and data broadcasting.

  The stream reproducing apparatus according to the first aspect of the present invention (corresponding to claim 1) reads out the transport stream of the designated program from the storage medium, separates and extracts the PES, section, and PCR from the transport stream, and extracts the DSMCC section. TS decoding section for adding PCR to the packet and PSI / SI section packet, AV synchronization section for notifying the section stay processing section described later of the reference clock notified from the audio decoder, DSMCC section packet and PSI / SI section packet The configuration includes a section retention processing unit that controls the construction timing of the section data using the assigned PCR and the reference clock notified from the AV synchronization unit.

  A stream reproduction apparatus according to the second aspect of the present invention (corresponding to claim 2) reads a transport stream of an instructed program from a storage medium, and separates and extracts a PES, a section, and a PCR from the transport stream An AV synchronization unit for notifying a reference clock notified from the audio decoder to a section retention processing unit to be described later, a section data from the DSMCC section packet and the PSI / SI section packet, and a PCR notified from the TS decoding unit. The DSMCC section data is sent to the DSMCC section processing unit using the PCR added to the section data, the PCR added to the DSMCC section data and the PSI / SI section data, and the reference clock notified from the AV synchronization unit. A configuration in which a section retention processing unit for controlling a timing of supplying an I section data to PSI / SI section processing unit.

  A stream reproduction apparatus according to the third aspect of the present invention (corresponding to claim 3) discards a section using a PCR added to a section packet or section data from a storage medium and a reference clock notified from an AV synchronization unit. The section retention processing unit is provided.

  A stream reproduction apparatus according to the fourth aspect of the present invention (corresponding to claim 4) is configured to include a channel selection processing unit that controls output of video and audio in accordance with copy control information extracted from the PSI / SI section.

  According to the stream reproduction apparatus of the present invention, it is possible to perform synchronous reproduction of audio, video, and data broadcasting without using a high-precision crystal oscillator. Furthermore, it is possible to control the timing of copy control in AVOUT during playback. As a result, as a merit on the user side, it is possible to copy content up to the point where copying is permitted. Further, as a merit on the broadcasting station side, it is possible to prohibit copying of content up to a point where copying is prohibited.

(Embodiment 1)
Hereinafter, an embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a block diagram showing a configuration of a stream reproduction apparatus according to Embodiment 1 of the present invention.

  In the present embodiment, an example of a stream reproducing apparatus that reproduces a program by reading a transport stream recorded on a storage medium will be described.

  In FIG. 1, a TS read processing unit 21 reads a transport stream of an instructed program from a storage unit 22 in which a transport stream is stored.

  The transport stream read from the storage unit 22 is supplied to the TS decoding unit 12. The TS decoding unit 12 separates and extracts PES and section packets from the supplied transport stream in accordance with the MPEG-2 standard. That is, the TS decoding unit 12 first extracts necessary packets with reference to a packet ID (Packet IDentifier, hereinafter referred to as PID) which is identification information of each packet of the transport stream, and makes it correspond to the PID. Sort. Further, the TS decoding unit 12 constructs a PES from the distributed packets. The extracted PES is supplied to the PES processing unit 31. Also, the TS decoding unit 12 extracts a PCR (Program Clock Reference) stored in the option field of the adaptation field of the transport stream. Further, the TS decoding unit 12 separates and extracts the DSMCC (Digital Storage Media Command and Control) section packet and the PSI / SI (Program Specific Information / Service Information) section packet, and adds the extracted PCR to these packets. . The DSMCC section packet to which PCR is added in this way is supplied to the DSMCC section buffer 301, and the PSI / SI section packet to which PCR is also supplied is supplied to the PSI / SI section buffer 401.

  A method of assigning the PCR to the DSMCC section packet and the PSI / SI section packet will be specifically described with reference to FIG.

  (1) in FIG. 2 shows the stream supplied to the TS decoding unit 12 by reading out the transport stream of the instructed program from the storage unit 22 in which the transport stream is stored. In (1) of FIG. 2, as various packets, a video packet indicated by “V”, an audio packet indicated by “A”, a PSI / SI section packet indicated by “P”, a DSMCC section packet indicated by “D”, and “PCR” An example including a PCR packet including a PCR indicated by "." PCR is described in the PCR packet.

  The TS decoding unit 12 stores the PCR of the extracted PCR packet. When the DSMCC section packet and the PSI / SI section packet are extracted, the stored PCR is added to these section packets. The DSMCC section packet to which PCR is added in this way is configured as shown in (2) of FIG. 2, and the PSI / SI section packet to which PCR is also added is shown in (3) of FIG. Such a configuration is supplied to the PSI / SI section buffer 401, respectively.

  The PES processing unit 31 converts the supplied PES into an audio stream and a video stream, and accumulates them in the audio buffer 201 and the video buffer 101.

  The section retention processing unit 701 controls the section data construction timing based on the reference clock notified from the AV synchronization unit 91 described later and the PCR added to the DSMCC section packet and the PSI / SI section packet. The DSMCC section data constructed by the section retention processing unit 701 is supplied to the DSMCC section processing unit 51, and the PSI / SI section data is supplied to the PSI / SI section processing unit 501.

  A method for controlling the construction timing of the section data based on the PCR assigned to the DSMCC section packet and the PSI / SI section packet at this time will be specifically described with reference to FIG.

  FIG. 3 is a flowchart showing a processing procedure until the section retention processing unit 701 constructs section data. The section retention processing unit 701 extracts the PCR attached to the DSMCC section packet and the PSI / SI section packet (step S10). The reference clock is notified from the AV synchronization unit 91 to the section retention processing unit 701 (step S11). The section retention processing unit 701 compares the PCR and the reference clock, and determines whether to construct or retain the section (step S12). If the reference clock is larger than the PCR, it is determined that a section is to be constructed, and the process proceeds to the next step. Otherwise, the section is retained. Next, it is determined whether to construct or discard the section (step S13). If the reference clock is smaller than (PCR + 10 seconds), a section is constructed (step S14). Otherwise, the section is discarded (step S15).

  The DSMCC section processing unit 51 converts the DSMCC section data into an original BML (Broadcast Markup Language) content file.

  The PSI / SI section processing unit 501 extracts information about broadcasts and programs from the PSI / SI section data supplied to the PSI / SI section buffer 401 and supplies the information to the channel selection processing unit 502.

  When the processing speed for reading from the storage unit 22 is faster than the video and audio decoding processing speeds of the video decoder 41 and the audio decoder 42, the video buffer 101 and the audio buffer 201 will eventually become full. When the buffer is full, the TS read processing unit 21 temporarily stops the read processing from the storage unit 22. Thereafter, when the video buffer 101 and the audio buffer 201 are vacated by the decoding process, the TS read processing unit 21 resumes the read process from the storage unit 22.

  The audio decoder 42 decodes a continuous audio stream at the timing supplied to the audio buffer 201, and is converted into a continuous audio signal by the audio output unit 72, so that a smooth sound corresponding to the audio signal is output by a speaker or the like. Audio can be output. The audio output unit 72 notifies the audio decoder 42 of the time information at which the audio is output as a reference clock, and the audio decoder 42 notifies the AV synchronization unit 91 of the reference clock.

  The AV synchronization unit 91 compares the reference clock notified from the audio decoder 42 with the PTS of the video stream notified from the video decoder 41, and processes the time from decoding the video stream to outputting the video signal to the outside. A video output trigger is notified to the video decoder 41 early. The video decoder 41 decodes the video stream at the timing when the video output trigger from the AV synchronization unit 91 is notified, and the video output unit 71 outputs the video. In addition, the AV synchronization unit 91 notifies the section stay processing unit 701 of the reference clock.

  The data broadcast engine 52 performs a data broadcast data restoration process supplied from the DSMCC section processing unit 51. That is, the data broadcast engine 52 extracts a BML content file described in BML in the data broadcast, generates data data of the data broadcast, operation data, etc. according to the description code described in the file, and the image data Processing related to the display of data broadcast images and the operation thereof is performed.

  The video synthesizing unit 61 synthesizes the image data of the data broadcast from the data broadcast engine 52 with the video from the video decoder 41. The synthesized video from the video synthesis unit 61 is converted into a video signal by the video output unit 71, and this video signal is output to the outside as a video output. Furthermore, a video corresponding to the video signal is displayed on a screen such as an external display, for example. In the present embodiment, a stream reproducing apparatus in which a display and a speaker are externally connected will be described as an example. However, for example, an apparatus having a built-in display and a speaker may be used.

  As described above, in the first embodiment, the transport stream of the instructed program is read from the storage medium, and the DSMCC section data and the PSI / SI section data are constructed using the PCR and the reference clock. By controlling, synchronized playback of audio, video, and data broadcasting becomes possible.

(Embodiment 2)
FIG. 4 is a block diagram showing the configuration of the stream reproduction apparatus according to Embodiment 2 of the present invention.

  In the second embodiment as well, as in the first embodiment, an example of a stream reproduction device that reproduces a program by reading out the transport stream of the designated program from the accumulation unit 22 in which the transport stream is accumulated. Will be described. Hereinafter, the configuration and operation of the second embodiment will be described with reference to FIG.

  In FIG. 4, the TS read processing unit 21 reads out the transport stream of the designated program from the storage unit 22 in which the transport stream is stored.

  The transport stream read from the storage unit 22 is supplied to the TS decoding unit 13.

  The TS decoding unit 13 separates and extracts PES and section packets from the supplied transport stream in accordance with the MPEG-2 standard. That is, the TS decoding unit 13 first extracts necessary packets by referring to the PID that is identification information of each packet of the transport stream, and performs distribution corresponding to the PID. Furthermore, the TS decoding unit 13 constructs a PES from the data included in each distributed packet. The extracted PES is supplied to the PES processing unit 31. In addition, the TS decoding unit 13 extracts the PCR stored in the option field of the adaptation field of the transport stream. Further, the TS decoding unit 13 separates and extracts the DSMCC section packet and the PSI / SI section packet. The extracted PCR, DSMCC section packet, and PSI / SI section packet are supplied to the section retention processing unit 702, respectively.

  The PES processing unit 31 converts the supplied PES into an audio stream and a video stream, and accumulates them in the audio buffer 201 and the video buffer 101.

  The section retention processing unit 702 constructs section data from the DSMCC section packet and the PSI / SI section packet, compares the reference clock notified from the AV synchronization unit 91 (to be described later) with the PCR, and constructs or retains the section. Judge whether or not. If the reference clock is larger than (PCR + 10 seconds), the section is discarded. When the reference clock is smaller than the PCR, it waits until the reference clock becomes larger than the PCR. When the reference clock becomes larger than the PCR, the DSMCC section data is supplied to the DSMCC section processing unit 51 and the PSI / SI section data is supplied to the PSI / SI section processing unit 501.

  The DSMCC section processing unit 51 converts the DSMCC section data into the original BML content file.

  The PSI / SI section processing unit 501 extracts information about broadcasts and programs from the PSI / SI section data supplied to the PSI / SI section buffer 401 and supplies the information to the channel selection processing unit 502.

  The audio decoder 42 decodes a continuous audio stream at the timing supplied to the audio buffer 201, and is converted into a continuous audio signal by the audio output unit 72, so that a smooth sound corresponding to the audio signal is output by a speaker or the like. Audio can be output. The audio output unit 72 notifies the audio decoder 42 of the reference clock, and the audio decoder 42 notifies the AV synchronization unit 91 of the reference clock.

  The AV synchronization unit 91 compares the reference clock notified from the audio decoder 42 with the PTS of the video stream notified from the video decoder 41, and processes the time from decoding the video stream to outputting the video signal to the outside. A video output trigger is notified to the video decoder 41 early. The video decoder 41 decodes the video stream at the timing when the video output trigger from the AV synchronization unit 91 is notified, and the video output unit 72 outputs the video. In addition, the AV synchronization unit 91 notifies the section stay processing unit 702 of the reference clock.

  The data broadcast engine 52 performs a data broadcast data restoration process supplied from the DSMCC section processing unit 51. That is, the data broadcast engine 52 extracts a BML content file described in BML in the data broadcast, generates data data of the data broadcast, operation data, etc. according to the description code described in the file, and the image data Processing related to the display of data broadcast images and the operation thereof is performed.

  The video synthesizing unit 61 synthesizes the image data of the data broadcast from the data broadcast engine 52 with the video from the video decoder 41. The synthesized video from the video synthesis unit 61 is converted into a video signal by the video output unit 71, and this video signal is output to the outside as a video output. Furthermore, a video corresponding to the video signal is displayed on a screen such as an external display, for example. In the present embodiment, a stream reproducing apparatus in which a display and a speaker are externally connected will be described as an example. However, for example, an apparatus having a built-in display and a speaker may be used.

  As described above, in the second embodiment, the transport stream of the designated program is read from the storage medium, and the supply timing of the DSMCC section data and the PSI / SI section data is controlled using the PCR and the reference clock. Thus, synchronized playback of audio, video, and data broadcasting becomes possible.

(Embodiment 3)
FIG. 5 is a block diagram showing the configuration of the stream reproduction apparatus according to Embodiment 3 of the present invention.

  Also in the third embodiment, as in the first embodiment, an example of a stream reproduction device that reproduces a program by reading out the transport stream of the designated program from the accumulation unit 22 in which the transport stream is accumulated. Will be described. Hereinafter, the configuration and operation of the third embodiment will be described with reference to FIG. Further, the same constituent elements as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In FIG. 5, the PSI / SI section processing unit 503 extracts copy control information from the PSI / SI section data supplied to the PSI / SI section buffer 401,
The channel selection processing unit 504 is supplied.

  The channel selection processing unit 504 supplied with the copy control information notifies the AVOUT unit 73 of the copy prohibition when it is determined from the copy control information that the copy is prohibited, and stops the output of video and audio. If it is determined from the copy control information that copying is possible, the AVOUT unit 73 is notified that copying is possible, and the output of video and audio is resumed.

  In any of the (Embodiment 1), (Embodiment 2), and (Embodiment 3), instead of extracting time information, a DSMCC section packet, and a PSI / SI section packet from a transport stream, For example, the same effect can be obtained by extracting time information, a data broadcast packet, and a channel selection information packet from a multiplexed stream other than the MPEG2 standard.

  In any of the (Embodiment 1), (Embodiment 2), and (Embodiment 3), instead of PCR, the TS decoding unit 12 uses a PTS (Presentation Time Stamp) and a DTS (Decoding Time). It is obvious that the same effect can be obtained by extracting time information of either (Stamp) or SCR (System Clock Reference) and adding it to each packet of the DSMCC section packet and the PSI / SI section packet.

  In any of the (Embodiment 1), (Embodiment 2), and (Embodiment 3) modes, 10 seconds used for determining whether to discard a section is an example of a threshold value. Depending on the required synchronization accuracy, it may be changed.

  Note that in any of the (Embodiment 1), (Embodiment 2), and (Embodiment 3) modes, the TS decoding units 12 and 13, the AV synchronization unit 91, the section retention processing units 701 and 702, etc. Each functional block is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.

  Further, if integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology.

  The present invention can be used for, for example, a stream reproduction device that reproduces a program in digital broadcasting, and a reception device that receives a program in digital broadcasting and also has a recording and reproduction function.

Configuration diagram of stream reproduction apparatus according to Embodiment 1 of the present invention A diagram showing a configuration example of a playback stream Section construction process flowchart Configuration diagram of stream reproduction apparatus according to Embodiment 2 of the present invention Configuration diagram of stream reproduction apparatus according to Embodiment 3 of the present invention Configuration of conventional stream playback device

Explanation of symbols

12, 13, 15 TS decoding unit 21 TS read processing unit 22 Storage unit 23 Stream multiplexing unit 31 PES processing unit 41 Video decoder 42 Audio decoder 51 DSMCC section processing unit 52 Data broadcasting engine 61 Video synthesis unit 71 Video output unit 72 Audio Output unit 73 AVOUT unit 101 Video buffer 201 Audio buffer 301 DSMCC section buffer 401 PSI / SI section buffer 501, 503 PSI / SI section processing unit 502, 504 Channel selection processing unit 701, 702 Section retention processing unit

Claims (10)

A stream playback device that plays back a recorded program by reading a transport stream recorded in a storage medium,
A transport stream decoding unit that extracts time information, a DSMCC section packet and a PSI / SI section packet from the transport stream, and adds time information extracted for each of the DSMCC section packet and the PSI / SI section packet;
A DSMCC section buffer for storing DSMCC section packets extracted by the transport stream decoding unit;
A PSI / SI section buffer for storing the PSI / SI section packets extracted by the transport stream decoding unit;
An AV synchronization unit for notifying a section clock processing unit of a reference clock;
When the reference clock notified from the AV synchronization unit and the time information given to the section packet are compared, the reference clock is larger, and the difference between the reference clock and the time information given to the section packet is less than the threshold A stream reproducing apparatus comprising: a section retention processing unit that constructs section data from section packets stored in the DSMCC section buffer and the PSI / SI section buffer. A stream playback device that plays back a recorded program by reading a transport stream recorded on a storage medium,
A transport stream decoding unit for extracting time information, a DSMCC section packet and a PSI / SI section packet from the transport stream, and notifying the section retention processing unit of the time information;
A DSMCC section buffer for storing DSMCC section packets extracted by the transport stream decoding unit;
A PSI / SI section buffer for storing the PSI / SI section packets extracted by the transport stream decoding unit;
An AV synchronization unit for notifying a section clock processing unit of a reference clock;
The section data is constructed from the section packets stored in the DSMCC section buffer and the PSI / SI section buffer, the time information notified from the transport stream unit is added to the section data, and the reference notified from the AV synchronization unit Comparing the time information given to the clock and the section data, if the reference clock is larger and the difference between the time information given to the reference clock and the section data is less than the threshold, the DSMCC section data is converted to the DSMCC section processing unit. A stream reproduction apparatus comprising a section retention processing unit for supplying PSI / SI section data to the PSI / SI section processing unit. When the reference clock notified from the AV synchronization unit and the time information given to the section packet are compared, the reference clock is larger, and the difference between the reference clock and the time information given to the section packet is greater than or equal to a threshold value The stream reproduction apparatus according to claim 1 or 2, further comprising a section retention processing unit that discards the DSMCC section packet or the PSI / SI section packet. A PSI / SI section processing unit that extracts copy control information from the PSI / SI section and notifies the channel selection processing unit;
4. The stream reproduction apparatus according to claim 1, further comprising a channel selection processing unit that controls video and audio output in accordance with the notified copy control information. A stream reproduction method for reproducing a recorded program by reading a transport stream recorded on a storage medium,
Extracting time information, DSMCC section packet and PSI / SI section packet from the transport stream, and adding the extracted time information for each DSMCC section packet and PSI / SI section packet;
Accumulating extracted DSMCC section packets;
Accumulating extracted PSI / SI section packets;
Notifying the reference clock;
Compare the reference clock and the time information given to the section packet, and if the reference clock is larger and the difference between the reference clock and the time information given to the section packet is less than a threshold, the accumulated section packet And a step of constructing section data. A stream reproduction method for reproducing a recorded program by reading a transport stream recorded on a storage medium,
Extracting time information, DSMCC section packet and PSI / SI section packet from the transport stream, and notifying time information;
Accumulating extracted DSMCC section packets;
Accumulating extracted PSI / SI section packets;
Notifying the reference clock;
The section data is constructed from the accumulated section packets, the time information is added to the section data, the time information given to the section data is compared with the reference clock, the reference clock is larger, the reference clock and the time And a step of supplying DSMCC section data and PSI / SI section data when a difference in time information given to the section data is less than a threshold. A program providing medium for providing a computer program for executing on a computer system a reproduction process of a recorded program by reading a transport stream recorded in a storage medium, wherein the computer program is
Extracting time information, DSMCC section packet and PSI / SI section packet from the transport stream, and adding the extracted time information for each DSMCC section packet and PSI / SI section packet;
Accumulating extracted DSMCC section packets;
Accumulating extracted PSI / SI section packets;
Notifying the reference clock;
Compare the reference clock and the time information given to the section packet, and if the reference clock is larger and the difference between the reference clock and the time information given to the section packet is less than a threshold, the accumulated section packet A program providing medium comprising the step of constructing section data. A program providing medium for providing a computer program for executing on a computer system a reproduction process of a recorded program by reading a transport stream recorded in a storage medium, wherein the computer program is
Extracting time information, DSMCC section packet and PSI / SI section packet from the transport stream, and notifying time information;
Accumulating extracted DSMCC section packets;
Accumulating extracted PSI / SI section packets;
Notifying the reference clock;
The section data is constructed from the accumulated section packets, the time information is added to the section data, the time information given to the section data is compared with the reference clock, the reference clock is larger, the reference clock and the time A program providing medium comprising: a step of supplying DSMCC section data and PSI / SI section data when a difference in time information given to section data is less than a threshold value. An integrated circuit that executes control within a playback device to play back a recorded program by reading a transport stream recorded on a storage medium,
A transport stream decoding unit that extracts time information, a DSMCC section packet and a PSI / SI section packet from the transport stream, and adds time information extracted for each of the DSMCC section packet and the PSI / SI section packet;
A DSMCC section buffer for storing DSMCC section packets extracted by the transport stream decoding unit;
A PSI / SI section buffer for storing the PSI / SI section packets extracted by the transport stream decoding unit;
An AV synchronization unit for notifying a section clock processing unit of a reference clock;
When the reference clock notified from the AV synchronization unit and the time information given to the section packet are compared, the reference clock is larger, and the difference between the reference clock and the time information given to the section packet is less than the threshold An integrated circuit comprising a section retention processing unit for constructing section data from section packets stored in the DSMCC section buffer and PSI / SI section buffer. An integrated circuit that executes control within a playback device to play back a recorded program by reading a transport stream recorded on a storage medium,
A transport stream decoding unit for extracting time information, a DSMCC section packet and a PSI / SI section packet from the transport stream, and notifying the section retention processing unit of the time information;
A DSMCC section buffer for storing DSMCC section packets extracted by the transport stream decoding unit;
A PSI / SI section buffer for storing the PSI / SI section packets extracted by the transport stream decoding unit;
An AV synchronization unit for notifying a section clock processing unit of a reference clock;
The section data is constructed from the section packets stored in the DSMCC section buffer and the PSI / SI section buffer, the time information notified from the transport stream unit is added to the section data, and the reference notified from the AV synchronization unit Comparing the time information given to the clock and the section data, if the reference clock is larger and the difference between the time information given to the reference clock and the section data is less than the threshold, the DSMCC section data is converted to the DSMCC section processing unit. An integrated circuit comprising a section retention processing section for supplying PSI / SI section data to the PSI / SI section processing section.