WO2005076622A1 - 情報処理装置および情報処理方法、プログラム、並びにデータ構造 - Google Patents
情報処理装置および情報処理方法、プログラム、並びにデータ構造 Download PDFInfo
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- WO2005076622A1 WO2005076622A1 PCT/JP2004/016532 JP2004016532W WO2005076622A1 WO 2005076622 A1 WO2005076622 A1 WO 2005076622A1 JP 2004016532 W JP2004016532 W JP 2004016532W WO 2005076622 A1 WO2005076622 A1 WO 2005076622A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2362—Generation or processing of Service Information [SI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4621—Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
- H04N21/8113—Monomedia components thereof involving special audio data, e.g. different tracks for different languages comprising music, e.g. song in MP3 format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
- H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
Definitions
- the present invention relates to an information processing apparatus, an information processing method, a program, and a data structure, and in particular, to an information processing apparatus, an information processing method, and a program for processing a stream including a basic stream and a multi-stage extension stream. And data structure.
- An MPEG (Moving Picture Experts Group) 2 audio stream has backward compatibility so that it can be reproduced by an MPEG1 audio decoder. That is, the MPEG2 audio stream has a structure including an MPEG1 audio stream portion as a basic portion and an MPEG2 audio portion as an extension portion thereof.
- FIG. 1 is a diagram showing a structure of a program stream 1 in a DVD video format.
- the program stream 1 in Figure 1 contains a video pack (Video Pack) 11, a MEPG2 audio pack (Audio Pack) 12, and multiple packs (Pack) 13—1 to 13—j, where j is any natural number. Let's do it.
- the payload of the MPEG2 audio pack 12 has a PES packet of MPEG1 audio including a PES packet header 22 and MPEG1 audio data 23, and a PES packet of an extension part of MPEG2 audio including a PES packet header 24 and MPEG2 audio data 25.
- the reproducing apparatus uses the PES packet header 22 and the MPEG1 audio data 23 which are the MPEG1 audio stream portion. Only A playback device that can play back separately and decode up to an MPEG2 audio stream (playback device that has the ability to play up to extended audio streams) plays back both basic and extended audio streams separately. . Specifically, the latter reproducing apparatus reproduces a PES packet header 24 and MPEG2 audio data 25, which are MPEG2 extended audio streams, in addition to the PES packet header 22 and MPEG1 audio data 23.
- Non-Patent Document 1 DVD Specifications for Read-Only Disc Part 3; Versionl.l Invention Disclosure
- a TS packet corresponding to a knock is relatively small, having a length of 188 bytes, and thus includes a basic part (MPEG1) and an extended part (MPEG2).
- MPEG1 basic part
- MPEG2 extended part
- the present invention has been made in view of such a situation, and it is an object of the present invention to encode and decode a stream including a basic stream and an extended stream of a plurality of stages. Means for solving the problem
- the first information processing device of the present invention converts the input stream into at least the basic stream and the first to n-th extended streams having expandability with respect to the basic stream and the first stream.
- Encoding means for encoding so as to include the first extended stream, an ID for identifying each of the basic stream encoded by the encoding means, and the first to n-th extended streams; a basic stream; n extended streams
- Table generation means for generating a table in which information relating to the system is described, and addition of a corresponding ID to each of the basic stream encoded by the encoding means and the first to n-th extended streams.
- Means, and a packetizing means for packetizing the basic stream, the first to n-th extension streams, and the tables to which IDs have been added by the adding means, into TS packets.
- the first information processing method of the present invention is characterized in that, among the basic stream and the first to n-th extended streams having expandability to the basic stream, at least the basic stream and the first stream are selected.
- An encoding step of encoding so as to include the extension stream of the first, the base stream encoded by the processing of the encoding step, an ID for identifying each of the first to n-th extension streams, the basic stream, and the first to n-th IDs corresponding to the table generation step for generating a table in which information for associating with the extension streams of the first and second base streams encoded by the processing of the encoding step, and the first to n-th extension streams.
- the ID is added by the addition step to be added and the processing of the addition step.
- the first program of the present invention is configured to convert an input stream into at least a basic stream and a first extended stream among a basic stream and first to n-th extended streams having expandability with respect to the basic stream.
- An encoding step for encoding so as to include a stream; an ID for identifying each of the basic stream encoded by the processing of the encoding step and the first to n-th extension streams; a basic stream; and an ID for identifying the first to n-th streams.
- IDs corresponding to each of the table generation step for generating a table in which information for associating the extended stream with the first extended stream and the basic stream encoded by the encoding step and the first to n-th extended streams are provided.
- ID is added by adding step and adding caro step Basic stream, expanded stream of first to n, and a table, respectively, characterized in that to execute processing including the onneti spoon step of ariati spoon into TS packets to the computer.
- the input stream is composed of the basic stream and the first to n-th streams.
- the basic stream and the first stream are encoded so as to include the first extended stream, and the IDs for identifying the encoded basic streams, the first to n-th extended streams, the basic stream, and A table in which information relating to the first to n-th extension streams is described is generated, and a corresponding ID is added to each of the encoded basic stream and the first to n-th extension streams.
- the stream, the first to n-th extension streams, and the table are respectively packetized into TS packets.
- the second information processing apparatus of the present invention includes a TS packet forming a basic stream, a TS packet forming each of first to n-th extended streams having expandability with respect to the basic stream, and An input for inputting a stream including a TS packet in which a table describing information for associating an ID for identifying a TS packet with a basic stream composed of the TS packet or the first to n-th extension streams is stored.
- Means referring to a table stored in the TS packet inputted by the input means, and judging means for judging the type of stream that can be processed by the user, and the stream judged by the judging means to be capable of being processed by the user.
- a buffer unit for buffering the TS packet selected by the selection unit for each ID may be further provided.
- the second information processing method of the present invention provides a TS packet constituting a basic stream, a TS packet constituting each of first to n-th extended streams having expandability with respect to the basic stream, and An input for inputting a stream including a TS packet in which a table describing information for associating an ID for identifying a TS packet with a basic stream composed of the TS packet or the first to n-th extension streams is stored.
- Step a step of referring to the table stored in the TS packet input by the processing of the input step to determine the type of stream that can be processed by the user, and the processing of the determination step determines that the user can process the stream.
- a second program includes a TS packet constituting a basic stream, a TS packet constituting each of first to n-th extended streams having expandability with respect to the basic stream, and a TS packet.
- a stream containing a TS packet storing a table in which information for associating an ID for identifying a TS with a basic stream composed of TS packets or the first to n-th extension streams is stored.
- the step of referring to the table stored in the TS packet input by the processing of the input step to determine the type of stream that can be processed by the user, and the processing of the determination step determines that the user can process the stream.
- Selecting a TS packet with an ID associated with the stream from the stream It shall be the said to execute processing including a decoding step of decode the TS packets selected by processing in the computer.
- each of the first to n-th extension streams is composed of a TS packet, a TS packet which constitutes a basic stream, and an ID and a TS packet for identifying the TS packet.
- the first data structure of the present invention is that, in the entire stream, a TS packet constituting a basic stream, a TS packet constituting each of the first to n-th extension streams, a basic stream or a first stream, To the n-th extension stream, and a TS packet storing a table in which information for associating the TS packet with an ID for identifying the TS packet is stored.
- each of the headers of the TS packets constituting each of the first to n-th extended streams includes an ID for identifying the TS packet.
- the TS packets constituting the basic stream included in the entire stream and the TS packets constituting each of the first to n-th extension streams are transmitted at the same time.
- the packets may be consecutively arranged in the order of the TS packets constituting the basic stream and the TS packets constituting each of the first to n-th extension streams.
- the entire stream includes a TS packet forming the basic stream, a TS packet forming each of the first to n-th extension streams, and the basic stream or the first stream.
- a TS packet storing a table in which information for associating the TS packet with an ID for identifying the TS packet is stored.
- each header of the TS packets constituting each of the first to n-th extension streams includes an ID for identifying the TS packet.
- the third information processing apparatus of the present invention encodes at least a basic stream of an entire stream that can include a basic stream and first to n-th extended streams having expandability with respect to the basic stream.
- the same one added to the one encoded by the encoding means the same first ID used to identify the entire stream.
- Second adding means for adding the second ID, and the first ID and the second ID are added by the first adding means and the second adding means.
- a packetizing unit for packetizing each of the basic stream and the first to n-th extension streams into TS packets.
- the encoding means is configured such that TS packets constituting the basic stream included in the entire stream and TS packets constituting each of the first to n-th extension streams are consecutively reproduced at the same time. In this way, the encoding can be performed so that the TS buckets constituting the basic stream and the TS packets constituting each of the first to n-th extension streams are arranged in this order.
- the encoding unit includes the synchronization unit. Thus, it can be used to encode the existing extension stream among the first to n-th extension streams and the basic stream.
- the encoding unit performs the first to n-th synchronization units in the synchronization unit.
- the overall The stream may be encoded at a variable bit rate.
- the third information processing method of the present invention encodes at least a basic stream of an entire stream that can include a basic stream and first to n-th extended streams that have expandability with respect to the basic stream.
- the same first ID used to identify the entire stream is added to the encoding step, the basic stream, and the first to n-th extension streams that have been encoded by the encoding step processing.
- Of the basic stream and the first to n-th extended streams are encoded by the encoding step of the basic stream and the first to n-th extended streams.
- a third program of the present invention is configured to encode at least the basic stream among the entire streams that can include the basic stream and the first to n-th extended streams having expandability with respect to the basic stream.
- the same first ID used to identify the entire stream is added to the step, the basic stream, and the first to n-th extension streams encoded by the encoding step processing.
- those encoded by the encoding step processing include the basic stream and the first to n-th extension streams, respectively.
- a second adding step of adding a second ID for identifying the First ID and the second ID are added by processing-up
- the present invention is characterized by causing a computer to execute processing including a packetizing step of packetizing a basic stream and first to n-th extension streams into TS packets.
- At least the basic stream is encoded out of the entire stream that can include the basic stream and the first to n-th extended streams having expandability with respect to the basic stream.
- the same first ID used to identify the entire stream is added to the encoded one of the basic stream and the first to n-th extension streams, and the basic stream and the first A second ID for identifying each of the first to n-th extension streams is added, and each of the two is streamed to a TS packet.
- the TS packet forming the basic stream and the TS packets forming the first to n-th extended streams each having expandability with respect to the basic stream include: Input means for inputting an entire stream that can be included, a first ID stored in each of the TS packets input by the input means and used for identifying the entire stream; a basic stream; On the basis of a second ID for identifying each of the first to n-th extension streams and predetermined conditions that have been set in advance! Is selected from the entire stream, and decoding means for decoding the TS packet selected by the selection means is provided.
- the input means includes: transmitting TS packets constituting a basic stream to be reproduced at the same time; and TS packets constituting each of the first to n-th extension streams. It is assumed that the entire stream arranged in the order of the TS packets constituting the TS packets and the TS packets constituting each of the first to n-th extension streams is input.
- the entire stream input to the input means includes at least the encoded basic stream, and the first to n-th extension streams corresponding to the respective synchronization units of the basic stream are output at a variable bit rate. It can be encoded and included further.
- the TS packet forming the base stream and the TS packets forming each of the first to n-th extension streams having expandability with respect to the base stream are included.
- a second ID for identifying each of the first to n-th extended streams and a predetermined condition which has been previously set and can be processed by the user the entirety of the TS packet can be processed. It is characterized by including a selection step of selecting from a stream and a decoding step of decoding the TS packet selected by the processing of the selection step.
- the fourth program of the present invention includes a TS packet constituting a basic stream and TS packets constituting each of first to n-th extended streams having expandability with respect to the basic stream.
- Input step of inputting the entire stream to be obtained, a first ID stored in each of the TS packets input by the processing of the input step and used for identifying the entire stream, a basic stream, and a first ID.
- a decoding step of decoding the TS packet selected by the processing of the selecting step.
- a TS packet forming a base stream and TS packets forming each of the first to n-th extension streams having expandability with respect to the base stream are included.
- the first ID used to identify the entire stream, which is stored in each of the TS packets and is used to identify the entire stream, the base stream, and each of the first to n-th extension streams is identified.
- a TS packet that can be processed by itself is selected from the entire stream and decoded.
- the second data structure of the present invention is that, in the entire stream, any one of the TS packet forming the basic stream and the first to n-th extended streams corresponding to each synchronization unit of the basic stream is included. If such a synchronization unit exists, in that synchronization unit, A TS packet forming an existing extension stream among the first to n-th extension streams is included, and a TS packet forming a basic stream and a TS packet forming each of the first to n-th extension streams are included.
- Each header shall include a first ID used to identify the entire stream, and a second ID to identify each of the base stream and each of the first to n-th extension streams. It is characterized by.
- the TS packets constituting the basic stream included in the entire stream and the TS packets constituting each of the first to n-th extension streams are consecutive TS packets reproduced at the same time, and The TS packets constituting the basic stream and the TS packets constituting each of the first to n-th extension streams are arranged in this order.
- the whole stream includes at least a basic stream, and further includes a variable number of TS packets constituting first to n-th extension streams corresponding to respective synchronization units of the basic stream. It can be.
- the entire stream includes any one of the TS packets constituting the basic stream and the first to n-th extension streams corresponding to each synchronization unit of the basic stream.
- the synchronization unit includes a TS packet constituting an existing extension stream among the first to n-th extension streams, and a TS packet constituting a basic stream,
- the first ID used to identify the entire stream, the basic stream, and the first to n-th extension streams are included in the header of each TS packet that constitutes each of the And a second ID for identifying each of them.
- the first aspect of the present invention it is possible to perform processing corresponding to stream expansion.
- encoding can be performed so as to correspond to the information processing device on the receiving side.
- the second aspect of the present invention it is possible to perform processing corresponding to stream expansion.
- decoding can be performed according to its own processing capability.
- the data structure can be a data structure corresponding to the information processing device on the receiving side.
- the fourth aspect of the present invention it is possible to perform processing corresponding to stream expansion.
- encoding can be performed so as to correspond to the information processing device on the receiving side.
- the fifth aspect of the present invention it is possible to perform processing corresponding to stream expansion.
- decoding can be performed according to its own processing capability.
- a data structure corresponding to stream expansion can be provided.
- the data structure can be a data structure corresponding to the information processing device on the receiving side.
- FIG. 1 is a diagram showing a structure of a program stream in a DVD video format.
- FIG. 2 is a diagram illustrating an overall configuration example of a transmission / reception system according to a first embodiment of the present invention.
- FIG. 3 is a block diagram showing a configuration example of a transmitting apparatus of FIG. 2.
- FIG. 4 is a diagram illustrating the structure of a TS in which a basic audio stream and a multi-stage extended audio stream are multiplexed.
- FIG. 5 is a diagram illustrating the structure of a TS in which a basic audio stream and a multi-stage extended audio stream are multiplexed.
- FIG. 6 is a flowchart illustrating a TS packet transmission process in the transmission device of FIG. 3.
- FIG. 7 is a diagram illustrating an example of a PAT table.
- FIG. 8 is a diagram illustrating an example of a PMT table.
- FIG. 9 is a flowchart illustrating a TS packet generation process.
- FIG. 10 is a block diagram showing a configuration example of a receiving device in FIG. 2.
- FIG. 11 is a diagram illustrating a configuration example of an audio stream processing unit that can decode only a basic audio stream.
- FIG. 12 is a flowchart illustrating a TS packet receiving process in the receiving device of FIG. 10.
- FIG. 13 is a flowchart illustrating audio stream processing in the audio stream processing unit in FIG. 11.
- FIG. 14 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and a first extension audio stream.
- FIG. 15 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and first and second extended audio streams.
- FIG. 16 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and first to n-th extended audio streams.
- FIG. 17 is a flowchart illustrating audio stream processing in the audio stream processing unit in FIG.
- FIG. 18 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and first to n-th extended audio streams.
- FIG. 19 illustrates the order of TS packets.
- FIG. 20 is a block diagram illustrating a configuration example of a transmission device according to a second embodiment of the present invention.
- FIG. 21 is a diagram illustrating another example of the PMT table.
- FIG. 22 is a diagram illustrating the structure of a TS in which a basic audio stream and a multi-stage extended audio stream are multiplexed.
- FIG. 23 is a diagram illustrating the structure of a TS in which a basic audio stream and a multi-stage extended audio stream are multiplexed.
- FIG. 24 is a flowchart illustrating a TS packet generation process.
- FIG. 25 is a diagram illustrating the structure of a TS packet corresponding to FIG.
- FIG. 26 is a diagram illustrating the structure of a TS in which a basic audio stream and a first extension audio stream are multiplexed.
- FIG. 27 is a diagram illustrating the structure of a TS packet corresponding to FIG. 26.
- FIG. 28 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and first to n-th extended audio streams.
- FIG. 29 is a diagram illustrating the order of TS packets.
- FIG. 30 is a flowchart illustrating audio stream processing in the audio stream processing unit in FIG. 28.
- FIG. 31 is a flowchart illustrating audio stream processing in an audio stream processing unit in FIG. 28.
- FIG. 32 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and a first extension audio stream.
- FIG. 33 is a diagram illustrating the order of TS packets.
- FIG. 34 is a diagram illustrating a configuration example of an audio stream processing unit that can decode a basic audio stream and first and second extension audio streams.
- FIG. 35 is a diagram illustrating the order of TS packets.
- FIG. 36 is a diagram illustrating a personal computer.
- FIG. 37 is a diagram illustrating another configuration example of a TS packet.
- FIG. 2 is a diagram showing an example of the overall configuration of a transmission / reception system to which the present invention is applied.
- the transmitting / receiving system 40 includes a transmitting device 41 and a receiving device 42.
- Transmission equipment The device 41 is a device that transmits a stream composed of a plurality of TS packets, such as a broadcast station, for example.
- the receiving device 42 is a device that transmits the stream at home, such as a set-top box at home. The receiving device.
- the audio stream is encoded by the transmitting device 41, and is also formed into TS packets and transmitted.
- the receiving device 42 receives and decodes the TS packets, and outputs the audio stream. Is obtained.
- FIG. 3 is a block diagram showing a configuration example of the transmission device 41 of FIG.
- the transmission device 41 includes an input unit 71, an audio encoder 72, a basic buffer 73, extended buffers 74-1 to 74-n, an extraction information adding unit 75, a TS packet unit 76, and a transmitting unit 77.
- n is any natural number of 1 or more.
- the input unit 71 receives an audio stream to be transmitted.
- the audio encoder 72 encodes the audio stream.
- the audio encoder 72 in FIG. 3 is an encoder corresponding to the n-th stage extended audio stream. That is, the audio encoder 72 can encode the audio stream as a basic stream and an extended audio stream of a plurality of stages from the first stage to the n-th stage.
- the audio encoder 72 encodes the audio stream into the basic stream and the first to n-th extension streams, and encodes them into the corresponding basic buffer 73 and the corresponding number of extension buffers 74-1 to 74-n. And supply the stream.
- the audio encoder 72 supplies the encoded basic audio stream (BS) to the basic buffer 73, supplies the encoded first extended audio stream (Extl) to the extended buffer 74-1, and encodes the encoded second extended audio stream (Extl).
- the extension audio stream (Ext2) is supplied to the extension buffer 74-2, and similarly, the encoded n-th extension audio stream (ExtN) is supplied to the extension buffer 74-n.
- the number of stages of the extended audio stream corresponds to the code of the buffer.
- the basic audio stream is described as BS, and the first to n-th extended audio streams are described as Extl to ExtN, respectively.
- the audio encoder 72 of the present embodiment converts the audio stream into a basic stream. After being separated into the stream and the first to n-th extended audio streams, each may be encoded, or as a result of encoding the audio stream, the basic stream and the first to n-th extended audio streams may be encoded. It may be output.
- the basic buffer 73 stores (buffers) a basic audio stream
- the extension buffers 74-1 to 74-n store (buffer) the first to n-th extension audio streams, respectively. Then, based on the control from the TS packetizer 76, the audio streams stored in the basic buffer 73 and the extension buffers 74-1 to 74-n are respectively transmitted.
- the extraction information adding unit 75 generates a table as extraction information in order to extract a desired number of stages of extended audio streams from the basic audio stream and the first to n-th extended audio streams on the decoding side. I do.
- the table includes an ID (PID (Packet Identification) in the first embodiment) for identifying each of the basic audio stream and the first to n-th extended audio streams, and the basic audio stream and the first audio stream. Information for associating with the first to n-th extended audio streams is described.
- the tape tray is composed of a PAT (Program Association Table) and a PMT (Program Map Table). The details of the table will be described later with reference to FIGS. 7 and 8.
- the extraction information adding unit 75 supplies the table to the TS packet
- the TS packetizer 76 controls the basic buffer 73 and the extension buffers 74-1 to 74-n to acquire the basic audio stream and the first to n-th extension audio streams, and extracts the extraction information.
- the table supplied from the adding unit 75 is obtained.
- the TS packet shading unit 76 performs TS packet shading on the table, and converts the basic audio stream and the first to n-th extended audio streams into TS buckets based on the table (generates TS packets).
- the TS packet driver 76 adds a PID for identifying the type of the stream (the basic audio stream and the first to n-th extended audio streams) based on the table.
- the TS packetizer 76 supplies the generated TS bucket to the transmitter 77.
- the transmitting unit 77 transmits a TS packet. At this time, multiple T Since S packets are transmitted continuously, one stream (consisting of multiple TS packets) is transmitted as a result.
- the PID is for identifying each packet (TS packet (transport stream packet)) constituting the MPEG TS, and each packet has a unique ID.
- a value PID is assigned. That is, in order for the receiving device 42 on the receiving side to select a packet of the extension audio stream of a desired number of stages, the value of the PID attached to the packet is necessary.
- the TS is composed of a basic audio stream 81, a first extended audio stream 82-1 to an n-th extended audio stream 82-n.
- the basic audio stream 81 and the first to n-th extended audio streams 82-1 to 82-n are both coded using a predetermined number of audio samples as one unit. Each unit is indicated by a subscript in parentheses.
- the basic audio stream 81 is divided into a plurality of units such as BS (1), BS (2),..., BS (n) and encoded.
- the same subscripts for example, BS (l), Extl (l), Ext2 (l), ..., ExtN (l) are synchronously encoded by the audio encoder 72 and synchronized. To be played (decoded).
- the TS packetizer 76 separates the basic audio stream 81 and the first to n-th extended audio streams 82-1 to 82-n into separate PIDs (packet IDs). Multiplex with TS packet in ()) One TS packet stores, for example, data having a length of 188 knots.
- TS packet 93-2 of the second extended audio stream (Ext2) with PID a2 93-2
- T in the table The S packet 91 is transmitted by the transmission device 41 every predetermined cycle.
- the receiving device 42 on the reproduction side has at least the ability to decode the basic audio stream (BS). Also, if the receiving device 42 on the reproducing side can reproduce the extended audio stream up to a predetermined m-th stage (m is a natural number of 1 or more and m ⁇ n), the receiving device 42 And the first to m-th extended audio streams can be decoded.
- m is a natural number of 1 or more and m ⁇ n
- the receiving device 42 And the first to m-th extended audio streams can be decoded.
- the relationship between the basic audio stream and the extended audio stream for example, as the extended audio stream having a large value of n can be decoded, the audio reproduction quality and the functionality are enhanced.
- step S11 the input unit 71 receives an input of an audio stream, and outputs the received audio stream to the audio encoder 72 in step S12.
- step S13 the audio encoder 72 encodes the basic audio stream and the first to n-th extended audio streams. As a result, the audio encoder 72 outputs the basic audio stream shown in FIG. 4 and the first to n-th extended audio streams synchronously (vertically).
- step S14 the audio encoder 72 divides and outputs the encoded audio stream for each level (stream type). Specifically, the audio encoder 72 outputs the encoded basic audio stream to the basic buffer 73, outputs the encoded first extended audio stream to the extended buffer 74-1, and encodes the encoded second extended audio stream. The audio stream is output to the extension buffer 74-2, and the encoded nth extended audio stream is output to the extension buffer 74-n.
- step S15 the basic buffer 73 and the first to n-th extension buffers 74-1 to 74-n store (buffer) the encoded audio streams.
- step S16 the basic buffer 73 and the first to n-th extension buffers 74-1 to 74-n each output an audio stream encoded at a predetermined timing.
- the TS packet driver 76 controls the respective buffers (the basic buffer 73 and the first to n-th extension buffers 74-1 to 74-n) to read the audio stream.
- step S17 the extraction information adding unit 75 generates a table and supplies the table to the TS packet filtering unit 76. Specifically, the extraction information adding unit 75 generates a table as shown in FIGS. 7 and 8, and supplies this to the TS packet writer 76.
- FIG. 7 describes a PAT (Program Association Table).
- PAT Program Association Table
- the PMT-PID for the program-number is described respectively.
- the PMT-PID corresponding to the program-number 1 is X
- PAT and PMT are transmitted in different TS packets. That is, as shown in FIG. 5, the packet is transmitted as a TS packet 90 in a table describing PAT and a TS packet 91 in a table describing PMT.
- step S18 the TS packetizer 76 performs a TS packet generation process. The details of this process will be described later with reference to FIG.
- the TS packet generated by the TS packet deviator 76 is output to the transmitter 77.
- transmitting section 77 transmits a TS packet (audio stream composed of a plurality of TS packets) to receiving apparatus 42.
- a TS packet audio stream composed of a plurality of TS packets
- the stream including the TS packets 93-1 to 93-n of the stream is transmitted. Thereafter, the processing is terminated.
- the TS packet is transmitted to the receiving device 42, but may be recorded on various recording media (not shown). Further, when transmitting the TS packet to the receiving device 42, the TS packet may be recorded in a recording medium, and the recording medium may be provided to the receiving device 42, thereby indirectly transmitting the TS packet.
- step S31 the TS packetizer 76 acquires a table.
- This table is a table generated in step S17 of FIG. 6 and shown in FIGS. 7 and 8. That is, the table describes a PID for identifying each of the basic audio stream and each of the first to n-th extended audio streams, and information for identifying each of the basic audio stream and each of the first to n-th extended audio streams. Information included.
- step S32 the TS packet shading section 76 performs TS packet shading on the tape tape (generates a TS packet based on the table), and outputs the TS packet to the transmitting section 77 (the transmitting section 77 outputs the TS packet).
- a TS packet 90 describing the PAT and a TS packet describing the PMT in FIG. 5 are generated and output to the transmitting unit 77.
- the TS packet is transmitted only once, but in practice, a TS packet in which the table is described is transmitted at predetermined time intervals. Accordingly, even when the receiving device 42 starts receiving in the middle of the stream, the receiving device 42 can acquire the table and can reliably decode.
- step S33 the TS packetizer 76 attaches a PID to each of the basic buffer 73 and the audio streams from the first to n-th extension buffers 74-1 to 74-n based on the table.
- the table is the power transmitted after being TS-packed in the process of step S31.
- the TS-packet-holding unit 76 holds the table.
- step S34 the TS packet relay unit 76 generates TS packets based on the audio streams from the basic buffer 73 and the first to n-th extension buffers 74-1 to 74-n. As shown in FIG. 5, these basic audio streams and the first to n-th extended audio streams are generated as TS packets of different PIDs (packet IDs). That is, it is attached to a PID force TS packet for determining the type of stream.
- PIDs packet IDs
- step S35 TS packet relay unit 76 outputs the generated TS packet to transmitting unit 77. Thereafter, the processing returns to step S18 in FIG.
- the transmission device 41 capable of encoding the n-th extended audio stream divides the encoded data into a basic audio stream and first to n-th extended audio streams.
- a PID is attached based on the table, and the packet is transmitted after being TS-packaged.
- an audio stream including a plurality of TS packets to which a PID for identifying the type of the stream and a TS packet in the table are transmitted to the receiving device 42.
- the stream transmitted by the transmission device 41 includes a TS packet constituting the basic audio stream, a TS packet constituting the first to n-th extended audio streams, a PID for identifying these TS packets, and a basic audio stream.
- the receiving device 42 on the receiving side will be described below.
- FIG. 10 is a block diagram showing a configuration example of the receiving device 42 in FIG.
- the receiving device 42 includes a receiving unit 121, an audio stream processing unit 122, and an output unit 123.
- the receiving unit 121 receives the TS packet, and the audio stream processing unit 122 executes a process related to the audio stream. Specifically, the audio stream processing unit 122 decodes the received TS packet, Retrieve a stream.
- the output unit 123 outputs the audio stream processed by the audio stream processing unit 122.
- the audio stream processing unit 122 extracts a different audio stream depending on its decoding capability. Hereinafter, the audio stream processing unit 122 will be described.
- FIG. 11 is a diagram showing a configuration example of an audio stream processing unit 122 having an audio decoder capable of decoding only a basic audio stream.
- the audio stream processing unit 122 in Fig. 11 includes an input unit 151, a filter control unit 152, a PID filter 153, a basic buffer 154, and an audio decoder 155.
- Input section 151 receives an input of a TS bucket of the audio stream supplied from receiving section 121 in FIG.
- the input unit 151 supplies the TS packets of the table (tables described in FIGS. 7 and 8) among the TS packets of the audio stream to the filter control unit 152, and the other TS packets (for example, FIG.
- the PID filter 153 supplies the PID-added basic audio stream and the TS packets of the first to n-th extended audio streams. Further, for example, when the receiving unit 121 receives the TS packets of the video stream and the audio stream, the input unit 151 acquires only the TS packets of the audio stream.
- Filter control unit 152 controls the operation of PID filter 153 based on the acquired table. Specifically, the filter control unit 152 stores the types of streams that can be processed by itself, and determines the types of streams that can be processed by itself based on the table. Then, the filter control unit 152 refers to the PID of the stream that can be processed by itself and the table power, and controls the PID filter 153 so as to select the TS packet with the PID associated with the stream that can be processed by itself. For example, the filter control unit 152 notifies the filter 153 of the PID number associated with the type of stream that can be decoded as the PID number to be selected.
- the PID filter 153 selects (extracts) a TS packet based on the control from the filter control unit 152. Specifically, based on the PID notified from the filter control unit 152, The TS packets with the same PID are selected and supplied to the corresponding buffers. Each buffer stores (buffers) the TS packet selected by the PID filter 153. The audio decoder 155 acquires the TS packet stored in each buffer and decodes it.
- the audio stream processing unit 122 has only the audio decoder 155 corresponding to the basic audio stream, and has no ability to decode the first to n-th extended audio streams.
- the filter control unit 152 stores that the type of the stream that it can process is only the basic audio stream, and refers to the PID corresponding to the basic audio stream from the table.
- the filter control unit 152 notifies the PID filter 153 of a PID number that can pass the ID of the stream that can be decoded.
- the basic buffer 154 stores TS packets of the basic audio stream selected and supplied by the PID filter 153.
- the basic buffer 154 operates to synchronize the TS packets on the receiving side and to synchronize with the audio decoder 155.
- a buffer having only one basic buffer 154 is provided, and two buffers for synchronizing the TS packets on the receiving side and two buffers for synchronizing the audio decoder 155 are provided in series. You may.
- the audio decoder 155 decodes the TS packet of the basic audio stream and outputs the decoded basic audio stream.
- step S51 the receiving unit 121 of the receiving device 42 receives a TS packet (a stream composed of a plurality of TS packets).
- This TS packet is, for example, the TS packet transmitted by the transmitting device 41 in the process of step S19 in FIG.
- step S52 the receiving unit 121 extracts a TS packet of the audio stream and supplies the TS packet to the audio stream processing unit 122. For example, when the TS packet received by the receiving unit 121 includes the TS packet of the video stream, the receiving unit 121 extracts only the TS packet of the audio stream, and extracts the TS packet of the audio stream. To be supplied.
- step S53 the audio stream processing unit 122 performs audio stream processing for decoding TS packets of the audio stream (that is, an audio stream including a plurality of TS packets) according to the decoding capability of the audio stream processing unit 122. Execute. Details of this processing will be described later with reference to FIG.
- the audio stream that has been subjected to the audio stream processing by the audio stream processing unit 122 is supplied to the output unit 123.
- step S54 the output unit 123 outputs the decoded audio stream.
- the signal is output to a speaker (not shown). Thereafter, the process is terminated.
- the TS packet is received, and the TS packet of the audio stream is subjected to the audio stream processing (decoding) and output.
- This process is a process executed by the audio stream processing unit 122 in FIG. That is, the process is executed by the audio stream processing unit 122 that can decode only the basic audio stream.
- step S71 the input unit 151 receives an input of an audio stream TS packet (an audio stream including a plurality of TS packets).
- the TS packet of the audio stream is transmitted by the transmitting device 41 in step S19 of FIG. 6 described above.
- step S72 the input unit 151 supplies the TS packet in the table to the filter control unit 152. Specifically, since the TS packet of the audio stream includes the TS packet of the table, the TS packet of the basic audio stream, and the TS packets of the first to n-th extended audio streams, The unit 151 supplies the TS packets in the table from the TS buckets to the filter control unit 152.
- step S73 the input unit 151 supplies the TS packet with the PID to the PID filter 153. More specifically, in FIG. 5, the PID filter 153 supplies the basic audio stream to which the PID is attached and the TS packets of the first to n-th extended audio streams.
- step S76 the basic buffer 154 stores the supplied TS packet.
- the TS packet stored at this time is the TS packet of the basic audio stream.
- step S77 the basic buffer 154 outputs a TS packet to the audio decoder 155 at a predetermined timing.
- step S78 the audio decoder 155 decodes the TS packet of the supplied basic audio stream, and outputs the decoded audio stream in step S79.
- the PID is attached to the TS knocket, and the relationship between the PID and the type of the TS packet (the basic audio stream and the TS packets of the first to n-th extended audio streams) is described in the table. Therefore, even in the audio stream processing unit 122 (receiving device 42) capable of decoding only the basic audio stream as shown in FIG. 11, only the TS packet corresponding to the basic audio stream is selected and decoded. can do. That is, even when an audio stream extended in a plurality of stages is transmitted, the receiving device 42 including the audio stream processing unit 122 in FIG. 11 can take out and reproduce only the basic audio stream.
- an audio stream processing unit 122 having an audio decoder capable of decoding the basic audio stream and the first extension audio stream will be described with reference to FIG.
- FIG. 14 is a diagram showing a configuration example of the audio stream processing unit 122 having an audio decoder that can decode the basic audio stream and the first extension audio stream.
- parts corresponding to those in FIG. 11 are denoted by the same reference numerals, and description thereof will not be repeated because it is repeated.
- the audio stream processing unit 122 in FIG. 14 is different from the audio stream processing unit 122 in FIG. 11 in that a first extension buffer 202 is added, and a first extension in which the audio decoder 203 uses only the basic audio stream.
- the audio stream can also be decoded.
- the PID filter 153 can extract a first extended audio stream that is not limited to the basic audio stream.
- the audio stream processing unit 122 in FIG. 14 includes an input unit 151, a filter control unit 152,
- a PID filter 201 a basic buffer 154, a first extension buffer 202, and an audio decoder 203 are provided.
- Filter control section 152 controls the operation of PID filter 201 based on the table.
- the basic buffer 154 stores (buffers) TS packets of the basic audio stream extracted by the PID filter 201
- the first extended buffer 202 stores the first extended audio stream extracted by the PID filter 201.
- the audio decoder 203 acquires the TS packets stored in the basic buffer 154 and the first extension buffer 202, and decodes the TS packets.
- the audio stream processing unit 122 has an audio decoder 203 corresponding to the basic audio stream and the first extended audio stream, and is capable of decoding the second to n-th extended audio streams.
- the basic buffer 154 operates for synchronizing the TS packet on the receiving side and synchronizing with the audio decoder 203.
- the first extension buffer 202 operates to synchronize the TS packets on the receiving side and to synchronize with the audio decoder 203.
- the basic buffer 154 and the extension buffer 202 are provided one by one.
- a buffer for synchronizing the TS packets on the receiving side and a buffer for synchronizing with the audio decoder 203 are provided. Two each may be provided in series.
- the audio decoder 203 decodes the TS packet of the basic audio stream and the TS packet of the first extended audio stream, and outputs the decoded basic audio stream and the first extended audio stream.
- the receiving device 42 (the audio stream processing unit 122 in FIG. 14) capable of decoding (decoding) the basic audio stream and the first extension audio stream, the basic audio stream and the first Only the extended audio stream can be played separately.
- an audio stream processing unit 122 having an audio decoder capable of decoding the basic audio stream and the first and second extended audio streams will be described with reference to FIG.
- FIG. 15 is a diagram showing a configuration example of an audio stream processing unit 122 having an audio decoder capable of decoding a basic audio stream and first and second extended audio streams.
- portions corresponding to those in FIGS. 11 and 14 are denoted by the same reference numerals, and description thereof will not be repeated.
- the audio stream processing unit 122 in FIG. 15 sets the first extension buffer 202 in FIG. 14 as the first extension buffer 202-1 and the second extension buffer 202-2 as the audio decoder 2 32 Can decode a second extended audio stream that is composed of only the basic audio stream and the first extended audio stream. It is also assumed that the PID filter 231 can extract the basic audio stream and the first and second extended audio streams.
- the audio stream processing unit 122 in Fig. 15 includes an input unit 151, a filter control unit 152, a PID filter 231, a basic buffer 154, a first extended buffer 202-1, and a second extended buffer. 202-2 and an audio decoder 232 are provided.
- the second extension buffer 202-2 stores the TS packet of the second extension audio stream selected by the PID filter 231.
- the audio decoder 232 acquires the TS packets stored in the basic buffer 154 and the first and second extension buffers 202-1, 202-2, and decodes them.
- the audio stream processing unit 122 has an audio decoder 232 corresponding to the basic audio stream, the first and second extended audio streams, and outputs the third to n-th extended audio streams. No ability to decode.
- the basic buffer 154 operates to synchronize the receiving side TS packet and synchronize with the audio decoder 232.
- the first extension buffer 2202-1 operates to synchronize the TS packet on the receiving side and to synchronize with the audio decoder 232.
- the first extension buffer 202-2 operates to synchronize the TS packet on the receiving side and to synchronize with the audio decoder 232.
- a buffer for synchronizing TS packets on the receiving side provided with one basic buffer 154, one extended buffer 202-1, and one extended buffer 202-2, and an buffer.
- Two buffers for synchronizing with the decoder 232 may be provided in series.
- the audio decoder 232 decodes the TS packet of the basic audio stream and the TS packets of the first and second extended audio streams, and outputs the decoded basic audio stream and the first and second extended audio streams.
- the receiving device 42 capable of decoding (decoding) the basic audio stream and the first and second extended audio streams
- the basic audio stream In addition, only the first and second extended audio streams can be played separately.
- an audio stream processing unit 122 having an audio decoder capable of decoding the basic audio stream and the first to n-th extended audio streams will be described with reference to FIG.
- FIG. 16 is a diagram showing a configuration example of the audio stream processing unit 122 having an audio decoder capable of decoding the basic audio stream and the first to n-th extended audio streams. In the figure, the parts corresponding to FIG. , And the description is omitted because it is repeated.
- the audio stream processing unit 122 in FIG. 16 includes the third to n-th extension buffers 202-3 to 203 -n in FIG. 15, and the audio decoder 262 includes the basic audio stream, the first and second It is possible to decode the third to n-th extended audio streams that are not limited to only the extended audio stream. Further, the PID filter 261 can extract the basic audio stream and the first to n-th extended audio streams.
- the audio stream processing unit 122 in FIG. 16 includes an input unit 151, a filter control unit 152,
- a PID filter 261, a basic buffer 154, first to n-th extension buffers 202-1 to 202-n, and an audio decoder 262 are provided.
- the third to n-th extension buffers 202-3 to 202-n store the TS packets of the third to n-th extension audio streams extracted by the PID filter 261 respectively.
- the audio decoder 262 includes a basic buffer 154, and first to n-th extension buffers 202-1 to 202-2. Get TS packets stored in the range from 202 to n and decode them.
- the audio stream processing unit 122 has an audio decoder 262 corresponding to the basic audio stream and the first to n-th extended audio streams. That is, it has the ability to decode all of the received extended audio streams up to the nth.
- the basic buffer 154 operates to synchronize the receiving side TS packet and synchronize with the audio decoder 262.
- the first extension buffer 2202-1 operates to synchronize the TS packets on the receiving side and to synchronize with the audio decoder 262.
- the first extension buffer 202-2 operates to synchronize the receiving side TS packet and synchronize with the audio decoder 262.
- the first extension buffer 202-n operates to synchronize the receiving side TS packet and synchronize with the audio decoder 262.
- a buffer for synchronizing the TS packets on the receiving side with the basic buffer 154 and the extension buffers 202-1 to 202-n being provided one by one and a synchronization with the audio decoder 262 are provided. May be provided in series with two buffers.
- the audio decoder 262 decodes the TS packet of the basic audio stream and the TS packets of the first to n-th extended audio streams, and outputs the decoded basic audio stream and the first to n-th extended audio streams. .
- n-th step which is an example of step S53 in FIG. 12, will be described.
- the audio stream processing of the stage will be described.
- This process is a process executed by the audio stream processing unit 122 in FIG. That is, the process is performed by the audio stream processing unit 122 that can decode the first to n-th extended audio streams by adding the basic audio stream.
- the input unit 151 receives an input of a TS packet of an audio stream (an audio stream including a plurality of TS packets).
- the audio stream TS packet includes the table TS packet, the basic audio stream TS packet, and the first to n-th extended audio streams transmitted by the transmitting device 41 in step S19 of FIG. 6 described above. This is an audio stream including TS packets.
- step S92 the input unit 151 supplies the TS packet in the table to the filter control unit 152. Specifically, since the TS packet of the audio stream includes the TS packet of the table, the TS packet of the basic audio stream, and the TS packets of the first to n-th extended audio streams, The unit 151 supplies the TS packets in the table from the TS buckets to the filter control unit 152.
- step S93 the input unit 151 supplies the TS packet with the PID to the PID filter 261.
- the PID filter 261 is supplied with the basic audio stream to which the PID is attached and the TS packets of the first to n-th extended audio streams.
- the filter control unit 152 refers to the table and determines the type of stream that the audio decoder 262 can process. Specifically, the filter control unit 152 stores the type of the stream that can be processed by itself, the basic audio stream, and the first to n-th extended audio streams. The type of stream that can be processed, that is, the basic audio stream and the first to n-th extended audio streams are determined from the table. In other words, the filter control unit 152 determines the type of stream that can be processed by itself with reference to the table, and determines the PID associated with the stream as the type of stream that can be processed by itself.
- the filter control unit 152 stores the TS packet of the basic audio stream and the TS packet of the first to n-th extension audio streams in the basic buffer 154 and the first to n-th extension buffer 202, respectively.
- —1 to 202 Control the PID filter 261 to supply it to n.
- the PID filter 261 is controlled so as to supply the TS buckets marked with aN to the corresponding buffers.
- step S96 the basic buffer 154 and the first to n-th extension buffers 202-1 to 202-n store the supplied TS packets.
- step S97 the basic buffer 154 and the first to n-th extension buffers 202
- 1 to 202-n output TS packets to the audio decoder 262 at a predetermined timing.
- step S98 the audio decoder 262 decodes the supplied TS packet of the basic audio stream, and outputs the decoded audio stream in step S99.
- the streams to be received include a TS bucket constituting the basic audio stream, a TS packet constituting the first to n-th extended audio streams, a PID for identifying these TS packets, and a basic stream. It includes a TS packet of a table in which information for associating the audio stream with the first to n-th extended audio streams is included.
- the TS packets that make up the audio stream and the TS packets that make up the first to n-th extended audio streams are provided with PIDs for identifying the type of the audio stream.
- the audio stream processing unit 122 capable of decoding the basic audio stream and the first to n-th extended audio streams can also perform decoding.
- the receiving device 42 capable of decoding (decoding) the basic audio stream and the first to m-th (m is a natural number not less than 1 and not more than n) extended audio streams, the basic audio stream and the The first to m-th extended audio streams can be reproduced separately.
- FIG. 18 is a diagram illustrating a configuration example of the audio stream processing unit 122 that decodes the basic audio stream and the first to n-th extended audio streams.
- the multiplexing method of the TS is restricted. Specifically, in the TS, the units to be reproduced synchronously in the basic audio stream and the first to n-th extended audio streams must be arranged and encoded in order. Must. That is, in TS, the order of BS (l), Extl (l), Ext2 (l),---E xtN (l), BS (2), Ext2 (2), -ExtN (2) Must be encoded side by side with! /. In other words, as shown in FIG.
- the TS packet received by the receiving unit 121 of the receiving device 42 includes BS (1), Extl (1), Ext2 (l), -ExtN (l), BS (2), Ext2 (2), ... -ExtN (2) is input to the input unit 151 in order, and the input unit 151 outputs BS (1), Extl (1), Ex t2 (1), TS packets are supplied to the PID filter 301 in the order of ExtN (l), BS (2), Ext2 (2), ... -ExtN (2).
- the TS packets constituting the basic stream included in the entire stream and the TS packets constituting each of the first to n-th extension streams are such that TS packets reproduced at the same time are continuous and
- the TS packets constituting the basic stream and the TS packets constituting each of the first to n-th extension streams are arranged in this order (the transmitting device 41 on the encoder side outputs the TS packets arranged in this order and outputs the TS packets. There).
- the synchronization unit of the extended audio stream corresponding to each synchronization unit of the basic audio stream does not necessarily need to exist.
- the audio stream includes at least TS packets constituting the basic audio stream, and the TS packets constituting the first to n-th extended audio streams corresponding to the respective synchronization units of the basic audio stream.
- the number is further included as a variable length.
- one audio stream includes at least the basic audio stream and may include the first to n-th extended audio streams. If any of the first to n-th extended audio streams corresponding to the respective synchronization units of the basic audio stream (predetermined units reproduced at the same time) exists, In the synchronization unit, the existing extension stream among the first to n-th extension audio streams is encoded.
- the number of TS packets constituting the extended audio stream included in the entire audio stream has a variable length (only the TS packet corresponding to the first extended audio stream is included). , TS packets corresponding to the first to third extended audio streams).
- the audio stream processing unit 122 in Fig. 18 includes an input unit 151, a filter control unit 152, a PID filter 301, a notifier 302, and an audio decoder 303.
- the PID filter 301 is controlled to supply power.
- the PID filter 301 has BS (l), Extl (l), Ext2 (l), '''ExtN (l), BS (2), Ext2 ( 2), — Supply TS packets to buffer 302 in the order of ExtN (2).
- the buffer 302 has the order of BS (1), Extl (1), Ext2 (l), ...- ExtN (l), BS (2), Ext2 (2), ..., ExtN (2) Stores the TS packets supplied side by side.
- the audio decoder 303 acquires a TS packet stored in the buffer 302 and decodes the TS packet.
- the audio stream processing unit 122 has an audio decoder 303 corresponding to the basic audio stream and the first to n-th extended audio streams. That is, it has the ability to decode the received basic audio stream and all of the first to n-th extended audio streams.
- the notifier 302 operates to synchronize the TS packet on the receiving side and synchronize with the audio decoder 303.
- a buffer for synchronizing a TS packet on the receiving side with one buffer 302 is provided, and two buffers for synchronizing the audio decoder 303 are provided in series. You may do so.
- the audio decoder 303 sequentially decodes the TS packet of the basic audio stream and the TS packets of the first to n-th extended audio streams, and outputs the decoded basic audio stream and the first to n-th extended audio streams. Output.
- the number of the buffers can be reduced as compared with FIG. 16, and therefore, it can be realized at low cost. Also, in FIG. 16, although the number of buffers is larger than in FIG. 18, there is an advantage that the order of the encoded TS packets is not limited.
- the receiving device 42 (for example, the receiving device 42 having the audio stream processing unit 122 in FIG. 11) can separate and reproduce only the basic audio stream, and has a reproducing capability up to a predetermined stage n extended audio stream. 42 (for example, the receiver 42 having the audio stream processing unit 122 in FIG. 16) encodes the multiplexed stream to separate and reproduce the basic and the extended audio stream up to the stage n.
- a dangling and decoding method can be provided.
- a stream including a basic audio stream and an extended stream of a plurality of stages can be encoded so that it can be decoded according to the processing capability of the receiving side.
- the receiving apparatus determines the type of stream that can be processed by itself, and only the stream that can be processed by itself is determined. Can be decoded and played.
- a PID is used to identify each packet (TS packet) constituting an MPEG-TS, and a basic audio stream is used based on the PID. The stream and each of the first to n-th extended audio streams are identified.
- Subjd is used to identify each packet (TS packet) constituting the MPEG-TS.
- FIGS. 20 to 35 An example in which each of the basic audio stream and the first to n-th extended audio streams is identified based on the second embodiment of the present invention will be described with reference to FIGS. 20 to 35. . Note that an embodiment that overlaps with the first embodiment will be described with reference to the first embodiment (FIGS. 1 to 19) as appropriate.
- the transmission / reception system of the second embodiment is the same as the transmission / reception system 40 of FIG. 2 described above.
- a configuration example of the transmission device and the reception device that configure the transmission / reception system 40 of the present embodiment will be described.
- FIG. 20 is a block diagram showing a configuration example of a transmitting apparatus according to the second embodiment of the present invention. It is.
- the transmitting apparatus 310 includes an input unit 71, an audio encoder 72, a basic buffer 73, extended buffers 74-1 to 74-n, and a transmitting unit 77, an extraction information adding unit 311 and a TS packet unit. 312 are provided.
- n is an arbitrary natural number of 1 or more (an integer value of 1 or more).
- the portions corresponding to FIG. 3 are denoted by the same reference numerals, and detailed description thereof will not be repeated because it will be repeated. That is, the input unit 71, the audio encoder 72, the basic buffer 73, the extension buffers 74-1 to 74-n, and the transmission unit 77 have the same functions as those of the above-described units in FIG.
- Extraction information adding section 311 generates tables (PAT and PMT) as extraction information in order to extract one audio stream on the decoding side.
- an example of one audio stream is a Japanese voice or a English voice of a predetermined movie (content).
- This table defines a predetermined type of audio stream.
- the extraction information adding unit 311 generates the PAT shown in FIG. 7 described above and the PMT shown in FIG. 21 and supplies them to the TS packetizing unit 312.
- Fig. 21 is a diagram illustrating an example of the PMT of the transport stream (TS).
- TS transport stream
- FIG. 8 first embodiment
- a plurality of PIDs are described (entries) in stream_entryO.
- Audio_stream_type coding type is Information
- one PID the PAT of the TS is the same as in FIG.
- the value of the PMT-PID in FIG. 7 is referred to in the PMT in FIG.
- FIGS. 7 and 21 the same kind of audio stream (one audio stream) can be identified. In other words, one audio stream corresponding to one content can be identified by the tables (PAT and PMT) shown in FIGS.
- the TS packet relay unit 312 is provided with 31)) (1 addition unit 313.
- Subjd adding unit 313 predetermined conditions relating the Sub jd and the type of the TS packet are set in advance, and the Subjd adding unit 313 sets the TS packet header according to the condition.
- the TS packetizing unit 312 controls the basic buffer 73 and the extension buffers 74-1 to 74-n to acquire the basic audio stream and the first to n-th extension audio streams, and adds extraction information. Obtain the table (Figs. 7 and 21) supplied from unit 311. Further, the TS packet dagger 312 performs TS packet doodle on the table, and according to a predetermined condition and table set in the Subjd addition unit 313, converts the basic audio stream and the first to n-th extended audio streams, respectively. Perform TS packet generation (generate TS packets).
- the TS packet formatter 312 adds a PID, which is identification information common to one audio stream, to the header of the TS packet, and the Subjd adder 313 of the TS packetizer 312 Subjd for identifying the type of stream (basic audio stream and the 1st to n-th extended audio streams) is added to the header of the TS packet according to predetermined conditions. Further, the TS packet relay unit 312 supplies the generated TS packet to the transmission unit 77.
- a PID which is identification information common to one audio stream
- Transmitting section 77 transmits a TS packet. At this time, since a plurality of TS packets are continuously transmitted, one stream (consisting of a plurality of TS packets) is transmitted as a result.
- PID is information for identifying one audio stream, not information indicating the extensibility of the type of encoding of the TS packet. This is information indicating the expandability of the type of packet encoding. That is, according to Subjd, the type of stream (basic audio stream and first to n-th extended audio streams) can be identified. The header of each TS packet contains this Since the Subjd is added, the receiver of the decoder side can select packets of the extended audio stream of a desired number of stages.
- One TS bucket stores, for example, data having a length of 188 bytes.
- the TS packet 320 of the table describing the PAT (PAT90 of FIG. 5, that is, the same information as the PAT of FIG. 7), and the TS packet 321 of the table of PMT described (Same information as PMT in FIG.
- the TS packets 320 and 321 in the table are transmitted by the transmission device 310 at predetermined intervals.
- PID indicates the PID of the transport packet header.
- each of the basic audio stream 81 and the first to n-th extended audio streams 82-1 to 82-n in Fig. 4 uses a predetermined number of audio samples as one unit. Are shown in parentheses for each unit. Specifically, the basic audio stream 81 is encoded by being divided into a plurality of units such as BS (1), BS (2),..., BS (n). Similarly, for example, the first extended audio stream 82-1 is encoded by being divided into a plurality of units, such as Extl (l), Extl (2),..., Extl (n).
- the audio data is encoded by the audio encoder 72 shown in FIG. 20 and synchronously reproduced (decoded) by the receiving device 42 on the receiving side. It is.
- the TS packetizer 312 converts the basic audio stream 81 in FIG. 23 and the first to n-th extended audio streams 82-1 to 82-n (upper part in FIG. 23) into FIG. As shown in the middle part of the figure, a PES packet stream is formed and a PES packet stream 330 is obtained.
- PESH indicates a PES packet header.
- the TS packetizing unit 312 multiplexes each of the PES packets constituting the PES packet stream 330 as shown in the lower part of FIG. At this time, the TS packet filtering unit 312 adds the PID and Subjd to the header part of each TS packet according to the conditions set in the Subjd adding unit 313 and the table supplied from the extraction information adding unit 311.
- the TS packetizing section 312 packetizes the table supplied from the extraction information adding section 311 into TS packets. That is, the TS packetizing section 312 packetizes the PAT into the TS knocket 331 and the PMT into the TS knocket 332 in the tables supplied from the extraction information adding section 311.
- one TS packet does not necessarily include one audio frame (such as the entire BS (1) or the entire Extl (l)). Specifically, since data of a predetermined data length is stored in one TS packet, one audio frame (for example, the entire BS (1)) is divided (separated) into a plurality of TS packets. You. In the example of FIG. 23, BS (1) is divided into TS packets 333 and 334.
- the PMT TS packet 332 is illustrated as being transmitted from the transmitting unit 77 after the PAT TS packet 331 and before the TS packet 333. Actually, it is transmitted from the transmission unit 77 every predetermined cycle.
- PID aO
- TS packet transmission processing in transmitting apparatus 310 in FIG. 20 will be described. Since the processing is basically the same as the processing shown in the flowchart of FIG. 6, only the differences from the processing of FIG. 6 will be described using the flowchart of FIG. The processing in steps S11 to S16 is the same as the processing described above with reference to FIG.
- step S17 the extraction information addition unit 311 in Fig. 20 generates a table, and supplies the table to the TS packet doll unit 312. Specifically, the extraction information adding unit 311 generates a PAT and PMT table as shown in FIG. 7 and FIG. 21, and supplies this to the TS packet routing unit 311.
- step S18 the TS packet relay unit 312 performs a TS packet generation process.
- the TS packet generated by the TS packet relay unit 312 is output to the transmitting unit 77.
- step S19 the transmitting unit 77 transmits a TS packet (audio stream composed of a plurality of TS packets) to the receiving device 42 (Fig. 10). More specifically, TS packets 320 and 321, PAT and PMT (tape tape) 320, 321 and TS packets 322 and 3fe, and TS packets 323-1 through 323-1 through 1 through n of the extended audio stream The stream including 323-n is transmitted to the receiving device 42. Thereafter, the processing is terminated.
- the TS packet is transmitted to the receiving device 42 (FIG. 10).
- the TS packet may be recorded on various recording media (not shown).
- the recording medium By recording and providing the recording medium to the receiving device 42 (FIG. 10), the data is transmitted indirectly.
- step S131 the TS packetizer 312 acquires the tables (PAT and PMT).
- This table is the PAT and PMT generated in step S17 of FIG. 6 and shown in FIG. 7 and FIG.
- TS packetizing section 312 performs TS packetizing of the table (PAT and PMT) (generates a TS packet based on PAT and PMT), and outputs the result to transmitting section 77.
- the transmitting unit 77 transmits this table to the receiving device 42.
- a TS packet 320 in which the PAT is described in FIG. 7 and a TS packet 321 (see FIG. 22) in which the PMT is described are generated and output to the transmitting unit 77.
- a TS packet is transmitted only once, but in practice, a TS packet in which a table is described is transmitted at predetermined time intervals. By this means, even when the receiving device starts receiving in the middle of the stream, the receiving device can acquire the table and can reliably decode.
- step S133 the TS packetizing unit 312 sends the basic buffer 73 and the first to n-th expansions according to the table and the predetermined condition set in the 1 addition unit 313.
- Each of the audio streams from the extension buffers 74-1 to 74-n is provided with a PID and a Subjd.
- the table itself was transmitted after being TS-packed in the process of step S131. It is assumed that the TS packet is stored in the TS buffer unit 312.
- the TS packet processing unit 312 adds the audio stream from the basic buffer 73 and the audio streams from the first to n-th extension buffers 74-1 to 74-n.
- each corresponding Subjd is added according to a predetermined condition set in Subjd adding section 313.
- PID aO (identical) and the value of Subjd changes to 0, 1, 2, ⁇ ⁇ ⁇ , N.
- step S134 the TS packet relay unit 312 generates TS packets based on the audio streams from the basic buffer 73 and the first to n-th extension buffers 74-1 to 74-n, respectively. . From this, as shown in FIG. 22, these basic audio streams and the first to n-th extended audio streams have the same PID and different Subjd, respectively, and are assigned as TS packets. Generated. In detail, if the same audio frame is included, the same Subjd is added (see Sid in FIG. 23).
- step S135 TS packet relay unit 312 outputs the generated TS packet to transmitting unit 77. Thereafter, the processing returns to step S18 in FIG.
- transmitting apparatus 310 capable of encoding the n-th extended audio stream converts the encoded data into the basic audio stream and the first to n-th extended audio streams.
- the PID and the Subjd are added based on the conditions and the table set in the Subjd adding unit 313, and TS packets are transmitted.
- transmitting apparatus 310 transmits the PAT and PMT tables by TS packet routing. That is, transmitting apparatus 310 (FIG. 20) transmits, to receiving apparatus 42, an audio stream including a plurality of TS packets each having a Subjd for identifying the type of the stream attached to the header part and the TS packets in the table. .
- the stream transmitted by transmitting apparatus 310 includes a basic audio stream, a TS packet forming a first to n-th extended audio stream, and a TS packet in which PAT and PMT are described.
- the headers of the TS packets constituting the basic audio stream and the first to n-th extended audio streams include a PID for identifying one audio stream, and the type of each TS packet included in the audio stream. Subjd for identification is included, so the receiving side can perform decoding according to its own processing capability.
- FIG. 25 shows the basic audio stream of the TS (transport stream) shown in FIG.
- FIG. 3 is a diagram showing a structure of a TS packet transmitting the extended audio stream of FIG.
- Private_data_byte can be put in Adaptation_fieldO.
- One byte of this private_data_byte is used for Subjd purpose. In the case of the example of FIG. 25, it is described as Sub_id, and it is written as private_data_byte.
- transport_packet from sync_byte to Subjd constitutes the header part of the TS bucket (that is, PID and Subjd are described), and the payload describes the actual data (audio stream). Be composed.
- the second half of the TS packet 322 is a block in which the BS is described as a TS. This is used as the payload of the packet.
- adaptation-nelajength of adaptation-neld describes an adaptation-field key 21 , and flag is other information.
- Subjd values of 0, 1, 2,..., N are described according to the type of TS packet. Specifically, 0 is described for a TS packet corresponding to the basic audio stream, and 1 is described for a TS packet corresponding to the first extended audio stream. Thus, the PID and the Subjd are described in the header of the TS packet.
- FIG. 23 In the examples of Fig. 23 and Fig. 25, the structure of the TS packet of the basic audio stream and the audio stream that also has the multi-stage extended audio stream power is explained. A description will be given of the audio stream TS packet having only a few bits with reference to FIGS. 26 and 27.
- FIG. 26 A description will be given of the audio stream TS packet having only a few bits with reference to FIGS. 26 and 27.
- FIG. 26 is a diagram illustrating the structure of a transport stream when a basic audio stream and a first extension audio stream are multiplexed.
- the parts corresponding to Fig. 23 Minutes are given the same reference numerals.
- transport_priority (described as tp in Fig. 26) is used instead of Sub jd to identify the type of TS packet.
- the TS packetizer 312 converts the basic audio stream 81 and the first extended audio stream 82-1 in FIG. 26 (upper part in FIG. 26) into a PES packet stream as shown in the middle part of FIG. Into a PES packet stream 370.
- the TS packetizer 312 multiplexes each of the PES packets constituting the PES packet stream 370 by TS packet multiplexing as shown in the lower part of FIG. 26 to obtain TS knockets 371 to 378.
- the TS packetizer 312 determines the PID, transport_priority, and PID in the header of each TS packet according to the conditions set in the sub-id attached caro unit 313 and the table supplied from the extraction information adder 311. To be added. Actually, the TS packet driver 312 also adds other various information. In addition, the TS packet relay unit 312 packetizes the tables (PAT and PMT) supplied from the extraction information adding unit 311 into TS packets. That is, the TS packetizer 312 packetizes the PAT into the TS knocket 331 and the PMT into the TS knocket 332.
- FIG. 27 is a diagram showing the structure of a TS packet that transmits the basic audio stream of the TS (Transport Stream) in FIG. 26 and the first extension audio stream.
- the transport_priority flag is used to distinguish whether the data of the payload of the transport packet is the basic audio stream or the first extended audio stream.
- the description of transport_packet from sync_byte to continuity_counter in Fig. 27 configures the header portion of the TS packet (that is, describes the PID and transport_priority), and the description of payload configures the actual data (audio stream). Is done.
- the TS packet has a structure as shown in Fig. 27, and is compared with the TS packet structure in Fig. 25.
- the data amount of the header can be further reduced.
- the structure of the TS packet in FIG. 25 may be used.
- the method of defining Sub jd in the transport packet header is not limited to the methods of FIGS. 25 and 27, and other syntax fields can be applied.
- the receiving device on the reproduction side has at least the ability to decode the basic audio stream (BS). Also, if the receiving device 42 on the reproducing side can reproduce the extended audio stream up to a predetermined m-th stage (m is a natural number of 1 or more and m ⁇ n), the receiving device 42 (FIG. 10) Can decode the basic audio stream and the first to m-th extended audio streams.
- the relationship between the basic audio stream and the extended audio stream is that, for example, the higher the value of n, the higher the audio playback quality or the higher the functionality, as the extended audio stream can be decoded. I do.
- FIG. 28 shows a case where, in the TS, encoding units that are reproduced synchronously are arranged side by side in the order of the basic audio stream and the first to n-th extended audio streams.
- 13 is an example of an audio stream processing unit 122 applied to the audio stream processing unit.
- the TS packets constituting the basic stream included in the entire stream and the TS packets constituting each of the first to n-th extended streams are consecutive TS packets reproduced at the same time.
- the TS packets constituting the basic stream, and the first to n-th extended streams The TS packets constituting each of the systems are arranged in the order of the TS packets (the transmitting device 41 on the encoder side outputs the TS packets arranged in this order).
- the audio stream processing unit 122 in Fig. 28 includes an input unit 401, a PID filter control unit 402, a PID filter 403, a Subjd filter control unit 404, 3 1) "(1 filter 405, buffer 406, and audio decoder). 407 is provided!
- the input unit 401 synchronously reproduces the TS packet (the basic audio stream and the first to n-th extended audio streams) of the audio stream supplied from the receiving unit 121 (Fig. 10).
- the input of TS packets (units of TS packets that are input side by side) is accepted.
- the input unit 401 supplies the TS packets of the table (the PAT and PMT tables described above with reference to FIGS. 7 and 21) among the TS packets of the audio stream to the PID filter control unit 402.
- the packet (for example, the basic audio stream to which the PID or Subjd is added in FIG. 23 and the TS packet of the first to n-th extended audio streams) is supplied to the PID filter 403.
- the input unit 401 controls the header part of the basic audio stream to which the PID or Subjd is added and the header part of the TS buckets (TS packets other than PAT and PMT) of the first to n-th extended audio streams by the Subjd filter control. Supply to section 404.
- the header from sync_byte to Subjd in FIG. 25 is supplied to the Subjd filter control unit 404, and the input unit
- the header part from sync_byte to continuity_counter in FIG. 27 is supplied to the Subjd filter control unit 404.
- the Subjd filter control unit 404 includes information (value) of the Subjd described in the header part of the TS packet supplied from the input unit 401, and a predetermined value set in advance in the Subjd filter control unit 404. Based on the above condition, the operation of the Subjd filter 405 is controlled. Since the same conditions as those set in the Subjd adding unit 313 of the transmitting device 310 (FIG. 20) described above are set in the Subjd filter control unit 404, the Subjd filter control unit 404 sets this condition.
- the type of stream that can be processed by the audio decoder 407 is determined, and the operation of the Subjd filter 405 is controlled (the operation of the Subjd filter 405). Switch).
- the Subjd filter 405 selects (extracts) a TS bucket based on the control from the Subjd filter control unit 404! Specifically, the Subjd filter 405 selects a switch corresponding to the value of Subjd described in the header based on the control from the Subjd filter control unit 404. For example, based on the control from the Subjd filter control unit 404, the Subjd filter 405 filters the TS packet in which the value of Subjd described in the header portion of the TS packet is 0, 1, 2,. , Are sequentially supplied to the subsequent buffer 406. At this time, as shown in Figs.
- the Subjd filter 405 includes BS (1), Extl (1) , Ext2 (l),... -ExtN (l), BS (2), Ext2 (2), ' ⁇ , ExtN (2) in this order, and supplies the TS packet payload data to the buffer 406.
- the buffer 406 stores (buffers) the TS packet supplied from the Subjd filter 405.
- the buffer 406 is an audio buffer that operates to synchronize with the audio decoder 407.
- the buffer 406 has BS (1), Extl (1), ⁇ xt2 (l),---, ExtN (1), BS (2), Ext2 (2), Supplied in the order of (2) Stored TS packet (data).
- the buffer 406 outputs the buffered TS packets to the audio decoder 407 at a predetermined timing (that is, the audio decoder 407 outputs the TS packets stored in the buffer 406 at a predetermined timing). get).
- the audio decoder 407 decodes the TS packet supplied from the notifier 406.
- the audio decoder 407 supplies the decoded audio stream to a subsequent output unit 123 (FIG. 10).
- the PID value is set so that different values are not used depending on the type of stream (basic audio stream and first to n-th extended audio streams). Since the value of Subjd is different depending on the type of stream, an audio stream that combines basic and extended functions can be considered as one entity, and can be managed by giving one PID value to it. This is particularly effective when applied to an application that manages the basic audio stream and the multi-stage extended audio stream as one stream.
- the processing of the TS packet reception processing in receiving apparatus 42 (Fig. 10) provided with audio stream processing section 122 in Fig. 28 is basically the same as the processing in Fig. 12, but 12 Step S53
- the details of the audio stream processing in step S53 are different. Therefore, the n-th stage extended audio stream process, which is an example of the process in step S53 in FIG. 12, will be described with reference to the flowcharts in FIGS. 30 and 31.
- This process is a process executed by the audio stream processing unit 122 in FIG. That is, the process is executed by the audio stream processing unit 122 that can decode the basic audio stream and the first to n-th extended audio streams.
- the input unit 401 receives an input of a TS packet of an audio stream (an audio stream including a plurality of TS packets).
- the TS packet of this audio stream is composed of the TS packet of the table (FIGS. 7 and 21), the basic audio stream TS packet, and the first to n-th packets transmitted by the transmitting device 41 in step S19 of FIG. This is one audio stream including TS packets of the extended audio stream.
- step S172 the input unit 401 converts the TS packet in the table (FIGS. 7 and 21) into a PID.
- the TS packets of the audio stream include the TS packets of the tables (PAT and PMT), the TS packets of the basic audio stream, and the TS packets of the first to n-th extension audio streams. Therefore, the input unit 401 supplies the TS packets in the tables (FIGS. 7 and 21) to the PID filter control unit 402 among these TS packets (see FIGS. 22 and 23).
- step S173 the input unit 401 supplies the TS packet with the PID to the PID filter 403. Specifically, in FIG. 22 and FIG. 23, the basic audio stream to which the PID is added and the TS packets of the first to n-th extended audio streams are supplied to the PID filter 403.
- a TS packet TS packet associated with the audio stream
- step S174 the PID filter control unit 402 assigns the same PID (PID
- PID filter 403 so as to supply the TS packet of the basic audio stream and the TS packets of the first to n-th extension audio streams, which constitute one audio stream, to the Subjd filter 405. Will be controlled.
- step S176 the Subjd filter control unit 404 sets the information of the header portion of the TS packet supplied from the input unit 401 in the process of step S173 and the Subjd filter control unit 404 in advance.
- the audio decoder 407 performs processing based on predetermined conditions. The type of stream that can be managed is determined, and the Sub jd filter 405 is controlled. For example, the Subjd filter control unit 404 determines that the audio decoder 407 can process the basic audio stream and the first to n-th extended audio streams.
- the subjd filter control unit 404 based on this condition, determines that it is possible to determine itself based on this condition.
- the operation of the Subjd filter 405 is controlled so that the stream is supplied to the buffer 406 at the subsequent stage.
- Data is supplied to the buffer 406 in the order of the TS packets as shown in FIG.
- step S178 the buffer 406 stores (buffers) the TS packet supplied from the Subjd filter 405.
- BS (l), Extl (l), Ext2 (l),---, ExtN (1), BS (2), Ext2 (2) as shown in FIG. , ⁇ , ExtN (2) Stores the TS packets supplied in this order.
- the buffer 406 outputs the TS packet to the audio decoder 407 at a predetermined timing.
- the buffer 406 includes BS (1), Extl (1), Ext2 (l), ExtN (1), BS (2), Ext2 (2), ⁇ ⁇ , ExtN (2)
- the TS packets that have been buffered by the decoder are sequentially output to the audio decoder 407 at a predetermined timing.
- step S180 the audio decoder 407 sends the TS packets (BS (1), Extl (1), Ext2 (l), ..., ExtN (l), BS (2), TS packets supplied in the order of Ext2 (2),..., ExtN (2)) are sequentially decoded, and in step S181, the decoded audio streams are sequentially output.
- FIGS. 30 and 31 a table for distributing the TS packets constituting the basic audio stream, the TS packets constituting the first to n-th extended audio streams, and the PIDs to the stream to be received (FIG. 7).
- the PAT and PMT in FIG. 21) and the TS packets forming the basic audio stream and the TS packets forming the first to n-th extended audio streams include one for identifying one audio stream. Since the PID and the Subjd for identifying the type of the audio stream are added, the audio stream processing unit 122 (see FIG. 28) capable of decoding the basic audio stream and the first to n-th extended audio streams Decoding can also be easily performed in the receiving device 42).
- FIGS. 28 to 31 illustrate the power of the receiving apparatus 42 (FIG. 10) including the audio stream processing unit 122 capable of decoding the TS of FIGS. 22 and 23.
- FIGS. A configuration example in the case where the audio decoder 407 of the audio stream processing unit 122 capable of decoding the TS having the capability of decoding only the basic audio stream will be described with reference to FIG. In the figure, portions corresponding to those in FIG. 28 are denoted by the same reference numerals, and the description thereof will not be repeated because it is repeated.
- the audio stream processing unit 122 has only the audio decoder 407 corresponding to the basic audio stream, and has no ability to decode the first to n-th extended audio streams.
- the processing of the TS packet receiving processing in the receiving apparatus 42 (Fig. 10) provided with the audio stream processing unit 122 of Fig. 32 is the same as the processing of Figs. 12, 30, and 31, and Description is omitted.
- the Sub_id filter 405 switches the switch based on the control from the Subjd filter control unit 404.
- the Subjd filter 405 supplies only the TS packet of the basic audio stream to the buffer 406 as shown in FIG.
- the audio decoder 407 decodes the TS packet of the basic audio stream supplied from the buffer 406 at a predetermined timing.
- the PID indicating one stream and the Subjd for identifying the type of stream are added to the header of the TS packet, only the basic audio stream as shown in Fig. 32 is decoded.
- the possible audio stream processing unit 122 (receiving device 42) can also select and decode only the TS packet corresponding to the basic audio stream. That is, even when an audio stream extended in a plurality of stages is transmitted, the receiving device 42 including the audio stream processing unit 122 in FIG. 32 can extract and reproduce only the basic audio stream.
- Subjd is added to the header that is not in the payload of the TS packet, it is possible to determine whether or not the receiver can process itself without looking at the payload of the TS packet in the receiver 42 based on the header. Judgment can be made, and processing can be performed quickly.
- the example of the receiving apparatus 42 including the audio stream processing unit 122 capable of decoding the TS in Figs. 22 and 23 has been described.
- the audio decoder 407 of the audio stream processing unit 122 capable of decoding the TS in FIGS. 22 and 23 has the ability to decode only the basic audio stream and the first extension audio stream This will be described with reference to FIG.
- the audio stream processing unit 122 has only the audio decoder 407 corresponding to the basic audio stream and the first extended audio stream, and decodes the second to n-th extended audio streams. Inability to do so.
- the receiving apparatus 42 (Fig. 10) provided with the audio stream processing unit 122 shown in Fig. 34 has The processing of the TS packet reception processing is the same as the processing of FIG. 12, FIG. 30, and FIG. 31, and a description thereof will be omitted.
- the Subjd filter 405 supplies only the TS packets of the basic audio stream and the first extended audio stream to the buffer 406, as shown in FIG.
- the audio decoder 407 decodes the TS packets of the basic audio stream and the first extended audio stream supplied from the buffer 406 at a predetermined timing.
- the receiving device 42 (the audio stream processing unit 122 in Fig. 34) capable of decoding (decoding) the basic audio stream and the first extended audio stream, the basic audio stream and the first extended audio stream are combined. Only the extended audio stream can be played separately.
- the units of the encoding to be reproduced synchronously are sequentially encoded in the order of the basic audio stream and the first to n-th extended audio streams, and are supplied. 28, 32 and 34, the number of buffers can be reduced as compared with FIG. 16 of the first embodiment. Can be reduced. Also, the audio stream processing unit can be realized at low cost.
- the TS multiplexing method is used.
- the force described when performing stream processing when restrictions are imposed.
- a buffer corresponding to each stream type is provided. Buffers may be individually provided. In that case, the number of the buffers increases, and the limitation of the method of multiplexing the TS is eliminated, and the degree of freedom of the receiving device 42 can be further increased.
- the input unit 401 supplies the header of the TS packet to the Subjd filter control unit 404.
- 404 may be supplied.
- the Subjd filter control unit 404 controls the Subjd filter 405 based on the header of the TS packet supplied from the PID filter 403 instead of the input unit 401.
- the receiving device 42 when reproducing audio multiplexing a basic audio stream and a multi-stage extended audio stream, it has a decoding capability of only the basic audio stream.
- the receiving device 42 (for example, the receiving device 42 having the audio stream processing unit 122 in FIG. 32) can separate and reproduce only the basic audio stream, and has a reproducing capability up to an extended audio stream of a predetermined stage n.
- 42 (for example, the receiving apparatus 42 having the audio stream processing unit 122 in FIG. 28) encodes a multiplexed stream to separate and reproduce the basic and extended audio streams up to the stage n.
- a dangling and decoding method can be provided.
- a stream including a basic audio stream and a multi-stage extension stream can be decoded according to the processing capability of the reception side.
- the receiving device for example, FIG. 28, FIG. 32, and FIG. 34
- PID and Subjd may be added to the header of each TS packet, the present invention can be easily applied to a transport stream.
- the stream structure is not determined by the format, so that both the encoding and the decoding can cope. it can. That is, even in a device that cannot decode the basic audio stream, the audio stream to which the extension is added can be decoded.
- the present invention is not limited to the transmission device 41 having an encoder, but can be applied to all information processing devices that perform encoding. Further, the present invention is not limited to the receiving device 42 having a decoder, but can be applied to all information processing devices that perform decoding.
- the present invention is applied to the case where the present invention is applied to encoding and decoding of an audio stream.
- the present invention is not limited to this, and can be applied to encoding and decoding of a video stream. That is, the present invention can be applied to streams such as audio or video streams.
- the CPU 501 executes various processes according to a program stored in the ROM 502 or a program loaded from the storage unit 508 into the RAM 503.
- the RAM 503 also appropriately stores data necessary for the CPU 501 to execute various processes.
- the CPU 501, the ROM 502, and the RAM 503 are interconnected via an internal bus 504.
- the input / output interface 505 is also connected to the internal bus 504.
- the input / output interface 505 includes an input unit 506 including a keyboard, a mouse, and the like.
- An output unit 507 including a display such as a CRT and an LCD, a speaker, a storage unit 508 including a hard disk, and a communication unit 509 including a modem, a terminal adapter, and the like are connected.
- the communication unit 509 performs communication processing via various networks including a telephone line and CATV.
- a drive 510 is connected to the input / output interface 505 as necessary, and a removable medium 521 composed of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately mounted and read from the removable medium 521.
- the computer program is installed in the storage unit 508 as needed.
- this recording medium is provided to the user separately from the computer by a user. Provided to the user in a state in which it is not only configured by a removable medium 521 consisting of a removable medium in which a program is recorded, but also pre-installed in the main body of the apparatus.
- the program is recorded on a hard disk including a ROM 502 and a storage unit 508.
- the system represents the entire device including a plurality of devices.
Abstract
Description
Claims
Priority Applications (6)
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CN2004800424094A CN1926872B (zh) | 2004-02-06 | 2004-11-08 | 信息处理设备和信息处理方法 |
EP20040821281 EP1713276B1 (en) | 2004-02-06 | 2004-11-08 | Information processing device, information processing method, program, and data structure |
JP2005517621A JP4964467B2 (ja) | 2004-02-06 | 2004-11-08 | 情報処理装置、情報処理方法、プログラム、データ構造、および記録媒体 |
CA 2553708 CA2553708C (en) | 2004-02-06 | 2004-11-08 | Information processing device, information processing method, program, and data structure |
US10/588,501 US8483053B2 (en) | 2004-02-06 | 2004-11-08 | Information processing device, information processing method, program, and data structure |
KR1020067015875A KR101073950B1 (ko) | 2004-02-06 | 2006-08-04 | 정보 처리 장치 및 정보 처리 방법, 및 기록 매체 |
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Cited By (7)
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JP2006197543A (ja) * | 2004-12-16 | 2006-07-27 | Sony Corp | 多重化装置および多重化方法、並びにプログラム |
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JP4863990B2 (ja) * | 2004-10-07 | 2012-01-25 | パナソニック株式会社 | 情報記録媒体、tsパケット判定装置、及びデータ再生装置 |
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JP2021177638A (ja) * | 2014-09-04 | 2021-11-11 | ソニーグループ株式会社 | 送信装置、送信方法、受信装置および受信方法 |
JP7238925B2 (ja) | 2014-09-04 | 2023-03-14 | ソニーグループ株式会社 | 送信装置、送信方法、受信装置および受信方法 |
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Also Published As
Publication number | Publication date |
---|---|
CA2553708C (en) | 2014-04-08 |
CA2553708A1 (en) | 2005-08-18 |
EP1713276A1 (en) | 2006-10-18 |
CN1926872B (zh) | 2010-09-29 |
JPWO2005076622A1 (ja) | 2008-01-10 |
KR20070001125A (ko) | 2007-01-03 |
US20070165676A1 (en) | 2007-07-19 |
EP1713276B1 (en) | 2012-10-24 |
US8483053B2 (en) | 2013-07-09 |
JP5263364B2 (ja) | 2013-08-14 |
CN1926872A (zh) | 2007-03-07 |
JP2012042972A (ja) | 2012-03-01 |
JP4964467B2 (ja) | 2012-06-27 |
KR101073950B1 (ko) | 2011-10-17 |
EP1713276A4 (en) | 2010-06-16 |
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