WO2016002573A1 - データ処理装置、受信装置、データ処理方法、およびプログラム - Google Patents
データ処理装置、受信装置、データ処理方法、およびプログラム Download PDFInfo
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- WO2016002573A1 WO2016002573A1 PCT/JP2015/067978 JP2015067978W WO2016002573A1 WO 2016002573 A1 WO2016002573 A1 WO 2016002573A1 JP 2015067978 W JP2015067978 W JP 2015067978W WO 2016002573 A1 WO2016002573 A1 WO 2016002573A1
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- H—ELECTRICITY
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
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Definitions
- the present disclosure relates to a data processing device, a receiving device, a data processing method, and a program, and in particular, a data processing device, a receiving device, a data processing method, and a data processing device capable of suppressing deterioration in quality when data is reproduced. And program.
- CI Common Interface
- CAS Consumer Access System
- Patent Document 1 discloses a digital broadcast receiving system that enables a plurality of streams to be converted into a single combined stream and satisfactorily transmitted to and received from an external device.
- a receiving apparatus that receives a plurality of streams includes a FIFO (First In In First Out) section in order to avoid a collision when a plurality of TSs are multiplexed into one multiplexed TS. Then, in order to suppress the bit rate of the multiplexed TS, the receiving apparatus converts an unnecessary packet included in the multiplexed TS into a null packet (null packet), and places the null packet at another TS. Performs processing to replace the included valid packet.
- FIFO First In In First Out
- the STC System Clock Reference
- (Time Clock) is generated and video and audio are decoded based on the STC, decoding is performed with the time axis broken. For this reason, conventionally, for example, when video or audio is reproduced, if skipping or repeating is performed, the quality may be deteriorated.
- the present disclosure has been made in view of such a situation, and is intended to suppress deterioration in quality when data is reproduced.
- a data processing apparatus selects a packet that forms each service stream from a multiplexed stream obtained by multiplexing a plurality of service streams, and generates a single service stream And a predetermined number of null packets with time information with predetermined time information added to the payload in an area vacated when a single service stream is generated by the predetermined number of packet selection units.
- the demultiplexing unit for demultiplexing and the timing for outputting the null packet with time information are defined as the null packet with time information.
- an output timing adjusting unit that adjusts by referring to the time information attached to the bets.
- a receiving apparatus includes: a demodulator that performs decoding on a broadcast wave to obtain a multiplexed stream; and the multiplexed stream in which a plurality of service streams are multiplexed, and configures each service stream A predetermined number of packet selection units that generate one service stream, and a predetermined time information in an area that is vacant when a predetermined number of packet selection units generate one service stream.
- a demultiplexing unit that demultiplexes the stream multiplexed by the unit into a predetermined number of streams, and the null packet with time information.
- Output timing adjustment unit that adjusts the output timing with reference to time information given to the null packet with time information, and decodes video and audio included in the stream output from the output timing adjustment unit A decoding unit.
- a data processing method or program generates a single service stream by selecting a packet constituting each service stream from a multiplexed stream obtained by multiplexing a plurality of service streams. Insert null packets with time information with predetermined time information added to the payload into an area vacated when generating a stream of one service, and a predetermined number of streams into which the null packets with time information are inserted. The step of multiplexing, demultiplexing the multiplexed streams into a predetermined number of streams, and adjusting the timing of outputting the null packet with time information with reference to the time information attached to the null packet with time information including.
- one service stream is generated by selecting a packet constituting each service stream from a multiplexed stream obtained by multiplexing a plurality of service streams.
- a null packet with time information with predetermined time information added to the payload is inserted into an area that is freed when generating a stream, and a predetermined number of streams into which the null packets with time information are inserted are multiplexed and multiplexed.
- the divided streams are demultiplexed into a predetermined number of streams, and the timing of outputting the null packet with time information is adjusted with reference to the time information attached to the null packet with time information.
- FIG. 18 is a block diagram illustrating a configuration example of an embodiment of a computer to which the present technology is applied.
- FIG. 1 is a block diagram showing a configuration example of a conventional receiving apparatus that receives one stream.
- the receiving device 11 is connected with a display 12 and a speaker 13 and an antenna (not shown). And the receiver 11 displays an image
- the receiving device 11 includes a demodulation LSI 21, a decode LSI 22, a CI module 23, and a memory 24.
- the demodulation LSI 21 includes a tuner 31 and a demodulation unit 32, and is obtained by frequency-converting an RF (Radio Frequency) signal supplied by the antenna by receiving a broadcast wave and demodulating by the demodulation unit 32. This TS is supplied to the decode LSI 22.
- RF Radio Frequency
- the decode LSI 22 includes a demultiplexer 41, a video decoder 42, an audio decoder 43, and a CPU 44.
- the demultiplexer 41, the video decoder 42, and the audio decoder 43 perform processing according to control by the CPU 44. For example, after the demultiplexer 41 supplies the TS from the demodulation LSI 21 to the CI module 23, the demultiplexer 41 separates the TS returned from the CI module 23 into video ES (Elementary Stream) and audio ES according to PID (packet ID). To the video decoder 42 and the audio decoder 43, respectively.
- the video decoder 42 decodes the video ES into baseband and outputs it to the display 12, and the audio decoder 43 decodes the audio ES into baseband and outputs it to the speaker 13.
- the CI module 23 performs processing for descrambling the TS and returning it to the demultiplexer 41 after exchanging the key for the scrambled TS supplied from the demultiplexer 41.
- the memory 24 appropriately stores data necessary for the decoding LSI 22 to perform processing.
- the receiving device 11 configured as described above can receive one stream, display a video included in the stream, and output audio.
- FIG. 2 is a block diagram showing a configuration example of a conventional receiving apparatus that receives a plurality of streams.
- the receiving device 51 is configured to be able to receive four streams including three RF signals and one IP signal.
- the receiving device 51 is supplied with three RF signals received by an antenna (not shown) and one IP (Internet Protocol) signal distributed via a network such as the Internet.
- the receiving device 51 displays an image on a display (not shown) and outputs sound from a speaker (not shown).
- the reception device 51 includes a front end unit 52, a multi-stream processor 53, a CI module 54, and a decoding unit 55.
- the front end unit 52 includes three tuners 61-1 to 61-3, three demodulation units 62-1 to 62-3, and an IP network interface 63.
- the tuners 61-1 to 61-3 supply the IF signals obtained by performing frequency conversion on the supplied RF signals to the demodulation units 62-1 to 62-3.
- the demodulating units 62-1 to 62-3 demodulate the supplied IF signals to acquire TS, and supply the TS to the decoding unit 55.
- the IP network interface 63 is connected to a network such as the Internet, acquires a TS from an IP signal distributed via the network, and supplies the TS to the decoding unit 55.
- the multi-stream processor 53 includes three PID selection units 71-1 to 71-3, an IP transmission processing unit 72, a TS multiplexer 73, and a TS demultiplexer 74.
- the PID selection units 71-1 to 71-3 select only the packets constituting each corresponding stream (service) according to the PID included in the TS supplied from the demodulation units 62-1 to 62-3, and are unnecessary. An empty area is provided by converting the packet into a null packet. As a result, the PID selection units 71-1 to 71-3 each generate a partial TS, which is a partial TS reconstructed by only the packets constituting the desired stream, and supply the partial TS to the TS multiplexer 73.
- the IP transmission processing unit 72 generates a partial TS from the TS supplied from the IP network interface 63 and supplies it to the TS multiplexer 73 in the same manner as the PID selection units 71-1 to 71-3.
- the TS has a maximum bit rate of 96 Mbps, and the CI module 54 can only accept processing up to 96 Mbps. Therefore, it is necessary to reduce the bit rate when multiplexing four streams, and the PID selection units 71-1 to 71-3 and the IP transmission processing unit 72 select a partial TS that selects only necessary packets. By generating the bit rate, the bit rate can be reduced. In the partial TS, only some main sections and packets including video ES and audio ES are selected, and the others are replaced with null packets.
- the TS multiplexer 73 multiplexes the four partial TSs supplied from the PID selection units 71-1 to 71-3 and the IP transmission processing unit 72 to generate one multiplexed TS, and sends it to the CI module 54. Supply.
- the TS multiplexer 73 performs multiplexing by extracting and arranging all TSs with the same priority, such as round robin, for four TSs.
- the TS demultiplexer 74 demultiplexes the multiplexed TS, which is scrambled by the CI module 54 and further subjected to local encryption, into the original four partial TSs, and supplies the demultiplexed TS to the decoding unit 55.
- the CI module 54 includes a descrambling unit 81 and an encryption unit 82.
- the descrambling unit 81 descrambles the scrambled multiplexed TS supplied from the TS multiplexer 73 and supplies the descrambled TS to the encryption unit 82.
- the encryption unit 82 performs local encryption on the multiplexed TS supplied from the descrambling unit 81 (for example, by applying Content control Encryption) and returns the multiplexed TS to the TS demultiplexer 74. .
- the decoding unit 55 includes four demultiplexers 91-1 to 91-4, a video decoder 92, an audio decoder 93, and three storages 94-1 to 94-3.
- the four partial TSs demultiplexed by the TS demultiplexer 74 are supplied to the demultiplexers 91-1 to 91-4, respectively. Then, the demultiplexers 91-1 to 91-4 separate and output the video ES, audio ES, and the like from each partial TS. For example, the partial TS to be reproduced is supplied to the demultiplexer 91-1, and the demultiplexer 91-1 supplies the video ES separated from the partial TS to the video decoder 92 and the audio ES to the audio decoder. 93.
- the video decoder 92 decodes the video ES supplied from the demultiplexer 91-1, supplies it to a display (not shown), and displays the video.
- the audio decoder 93 decodes the audio ES supplied from the demultiplexer 91-1, supplies it to a speaker (not shown), and outputs the audio.
- the storages 94-1 to 94-3 are supplied with video ES and audio ES for each partial TS separated by the demultiplexers 91-2 to 91-4, and are stored in the storages 94-1 to 94-3.
- the reception device 51 configured as described above receives a plurality of streams, displays the video included in the stream to be reproduced, outputs the audio, and stores the video and audio included in the other streams. can do.
- FIG. 3 shows one TS supplied to one PID selection unit 71, showing the time direction in which packets are input or output from the right side to the left side, and from the upper side to the lower side.
- the TS obtained by performing each process in turn is shown.
- a packet V including a video ES, a packet A including an audio ES, and a section S including various metadata are arranged in a predetermined arrangement. ing.
- the PID selection unit 71 selects only the packet V and the packet A, for example, and replaces an unnecessary PID packet with a null packet N, thereby generating a partial TS.
- (1) and (6) shown below the two packets V indicate PCR.
- the packet O constituting another stream is inserted at the position where the null packet N of the partial TS output from the PID selection unit 71 is arranged, and multiplexed. TS is generated. Thereafter, the multiplexed TS is demultiplexed by the TS demultiplexer 74, and the output TS is output from the multi-stream processor 53.
- the interval between the packet V with PCR (1) and the packet V with PCR (6) is shown in the figure. However, the time axis will be broken. If the output TS is decoded in such a state, the quality of the video deteriorates.
- the output TS has no null packet that existed in the partial TS before multiplexing, and the time information is advanced, so when the output TS is reproduced in this state, Playback with a fast clock will be performed. Therefore, the buffer model breaks down, and decoding occurs in time and skipping occurs or repeats occur due to error concealment appear in the video. In addition, silence is frequently generated in the voice.
- FIG. 4 is a block diagram illustrating a configuration example of the first embodiment of the reception device 101 to which the present technology is applied.
- the same reference numerals are given to components common to the receiving apparatus 51 in FIG. 2, and detailed description thereof is omitted. That is, the receiving apparatus 101 is configured in common with the receiving apparatus 51 of FIG. 2 in that the receiving apparatus 101 includes a front end unit 52, a CI module 54, and a decoding unit 55. However, the receiving apparatus 101 is configured differently from the receiving apparatus 51 of FIG. 2 in that the receiving apparatus 101 includes a multi-stream processor 121 having a configuration different from that of the multi-stream processor 53 of the receiving apparatus 51 of FIG.
- the multi-stream processor 121 includes three PID selection units 71-1 to 71-3, an IP transmission processing unit 72, a TS multiplexer 73, and a TS demultiplexer 74, similarly to the multi-stream processor 53 of the receiving device 51 of FIG. In addition to having four insertion units 122-1 to 122-4, four FIFOs 123-1 to 123-4, four packet shift units 124-1 to 124-4, and a clock generation unit 125 Is done.
- Inserting sections 122-1 to 122-4 add null packets added with time information according to the clock generated by clock generating section 125 (hereinafter referred to as null packets with time information) to PID selecting sections 71-1 to 71-1. 71-3 and the partial TS supplied from the IP sending processing unit 72.
- the insertion units 122-1 to 122-4 detect a packet having PCR included in the partial TS, and add time information to the payload portion of the nearest null packet by going back the time axis from the detected packet.
- the null packet is replaced with a null packet with time information.
- the FIFOs 123-1 to 123-4 are the packets selected as necessary packets by the PID selection units 71-1 to 71-3 and the IP transmission processing unit 72, and the times inserted by the insertion units 122-1 to 122-4. Temporarily holds null packets with information.
- the packets held in the FIFOs 123-1 to 123-4 are sequentially read out to the TS multiplexer 73 for each TS series.
- the packet shift units 124-1 to 124-4 are arranged after the TS demultiplexer 74 and supplied with partial TSs demultiplexed by the TS demultiplexer 74. Further, the time information generated by the clock generation unit 125 is supplied to the packet shift units 124-1 to 124-4 with an offset.
- the packet shift units 124-1 to 124-4 compare the time information from the clock generation unit 125 with the null packet with time information included in the partial TS, and output the null packet with time information. Adjust. For example, the packet shift units 124-1 to 124-4 output null packets with time information to the decoding unit 55 at the same timing as the time information from the clock generation unit 125 or after the time information.
- the clock generation unit 125 generates time information with a constant clock and supplies the time information to the insertion units 122-1 to 122-4 and the packet shift units 124-1 to 124-4.
- the receiving apparatus 101 configured as described above inserts a null packet with time information according to the clock generated by the clock generation unit 125, and then adjusts the output timing based on the null packet with time information.
- the arrival time of the packet can be correctly reproduced.
- FIG. 5 as in FIG. 3, a video packet V, an audio packet A, a section S, and a null packet N are illustrated, and a null packet with time information inserted by the insertion units 122-1 to 122-4. T is illustrated.
- the insertion unit 122 generates a TS with time information by inserting a null packet with time information into an area vacated by replacing the null packet N when generating a partial TS.
- the insertion unit 122 inserts the null packet T with time information by adding the time information of the time stamp # 0 to the payload portion of the null packet N immediately before the packet V with the PCR of (1).
- the inserting unit 122 inserts the null packet T with time information by adding the time information of the time stamp # 5 to the payload portion of the null packet N immediately before the packet V with the PCR of (6).
- the TS with time information is multiplexed in the TS multiplexer 73, so that the packet O constituting another stream is inserted and a multiplexed TS is generated. Thereafter, the demultiplexed TS obtained by demultiplexing the multiplexed TS by the TS demultiplexer 74 is supplied to the packet shift unit 124.
- the packet shift units 124-1 to 124-4 adjust the timing of outputting the null packet T with time information of time stamp # 5 according to the time information generated by the clock generation unit 125, and insert the null packet N To delay.
- the arrival time before multiplexing can be guaranteed.
- the packet following the null packet T with time information of time stamp # 5 is not missing, arrival time information is guaranteed.
- the arrival time information of the packet having the PCR is correct, and the STC generated by the clock recovery based on the PCR can restore the time information on the transmission side.
- the reception apparatus 101 starts a process of receiving a multiplexed stream and a packet constituting the TS demodulated by the front end unit 52 is supplied to the multi-stream processor 121, the process is started.
- step S11 the PID selection units 71-1 to 71-3 and the IP transmission processing unit 72 select and reconfigure only the packets constituting the TS of the corresponding service according to the PIDs included in the supplied packets.
- the generated partial TS is generated and supplied to the insertion units 122-1 to 122-4.
- packets constituting the TS other than the services to which the PID selection units 71-1 to 71-3 and the IP transmission processing unit 72 respectively correspond are replaced with null packets.
- step S12 the insertion units 122-1 to 122-4 insert null packets with time information into the supplied partial TSs according to the clock generated by the clock generation unit 125, and the FIFOs 123-1 to 123-4. To hold each.
- step S13 the TS multiplexer 73 appropriately reads out the packets held in the FIFOs 123-1 to 123-4, multiplexes four streams, and supplies them to the CI module 54.
- step S14 the TS demultiplexer 74 demultiplexes the multiplexed stream supplied from the CI module 54 into four partial TSs, and supplies them to the packet shift units 124-1 to 124-4, respectively.
- step S15 the packet shift units 124-1 to 124-4 adjust the timing of outputting the null packet with time information according to the time information supplied from the clock generation unit 125.
- the receiving apparatus 101 can correctly reproduce the arrival time of the packet by using the null packet with time information. As a result, it is possible to prevent quality degradation when performing an operation of skipping or repeating video and audio. In addition, the receiving apparatus 101 can check whether time information is added by probing the interface with the CI module 54.
- FIG. 7 is a block diagram illustrating a configuration example of a second embodiment of a receiving device to which the present technology is applied.
- the same reference numerals are given to components common to the receiving apparatus 101 in FIG. 4, and detailed description thereof is omitted. That is, the receiving apparatus 101A is configured in common with the receiving apparatus 101 in FIG. 4 in that the receiving apparatus 101A includes a front end unit 52, a CI module 54, and a decoding unit 55. However, the receiving apparatus 101A has a multi-stream processor 121A configured differently from the multi-stream processor 121 of the receiving apparatus 101 in FIG.
- the multi-stream processor 121A includes PID selection units 71-1 to 71-3, an IP transmission processing unit 72, a TS multiplexer 73, a TS demultiplexer 74, insertion units 122-1 to 122-4, FIFOs 123-1 to 123-4,
- the configuration is the same as that of the multi-stream processor 121 of FIG.
- the multi-stream processor 121A is configured differently from the multi-stream processor 121 of FIG. 4 in that it includes a FIFO 131 and a packet shift unit 132.
- the multi-stream processor 121A supplies the multiplexed TS in which the TS with time information into which the null packet with time information is inserted by the insertion units 122-1 to 122-4 is multiplexed in the TS multiplexer 73 to the CI module 54. .
- the multi-stream processor 121A is configured such that the multiplexed TS returned from the CI module 54 is temporarily held in the FIFO 131 and then supplied to the packet shift unit 132.
- the packet shift unit 132 reads the multiplexed TS from the FIFO 131 and supplies it to the TS demultiplexer 74. At this time, the packet shift unit 132 adjusts the timing for outputting the null packet with time information according to the time information supplied from the clock generation unit 125, similarly to the packet shift units 124-1 to 124-4 in FIG. .
- the receiving apparatus 101A configured as described above can guarantee the arrival time at the stage of input to the TS demultiplexer 74 by disposing only one packet shift unit 132 before the TS demultiplexer 74.
- the receiving apparatus 101A can avoid the possibility that the arrival time will pass if the arrangement is unchanged in a multiplexed TS in which a plurality of TSs are multiplexed.
- the packet shift unit 132 can adjust the delay of reading from the FIFO 131 or the immediate reading so that the packet output to the TS demultiplexer 74 can be set at a constant interval.
- the receiving apparatus 101 may replace, for example, a null packet with a null packet with time information, or may replace a PID packet that is not used with a null packet with time information.
- the null packet with time information has a life span before the demultiplexer 91, and thus does not affect the PID filter as a system.
- PIDs that are not used can be changed dynamically.
- the processes described with reference to the flowcharts described above do not necessarily have to be processed in chronological order in the order described in the flowcharts, but are performed in parallel or individually (for example, parallel processes or objects). Processing).
- the program may be processed by one CPU, or may be distributedly processed by a plurality of CPUs.
- the above-described series of processing can be executed by hardware or can be executed by software.
- a program constituting the software executes various functions by installing a computer incorporated in dedicated hardware or various programs.
- the program is installed in a general-purpose personal computer from a program recording medium on which the program is recorded.
- FIG. 8 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processing by a program.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- An input / output interface 205 is further connected to the bus 204.
- the input / output interface 205 includes an input unit 206 composed of a keyboard, mouse, microphone, etc., an output unit 207 composed of a display, a speaker, etc., a storage unit 208 composed of a hard disk or nonvolatile memory, and a communication unit 209 composed of a network interface.
- a drive 210 for driving a removable medium 211 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is connected.
- the CPU 201 loads, for example, the program stored in the storage unit 208 to the RAM 203 via the input / output interface 205 and the bus 204 and executes the program. Is performed.
- Programs executed by the computer (CPU 201) are, for example, a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), etc.), a magneto-optical disk, or a semiconductor.
- the program is recorded on a removable medium 211 that is a package medium composed of a memory or the like, or provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be installed in the storage unit 208 via the input / output interface 205 by attaching the removable medium 211 to the drive 210.
- the program can be received by the communication unit 209 via a wired or wireless transmission medium and installed in the storage unit 208.
- the program can be installed in the ROM 202 or the storage unit 208 in advance.
- this technique can also take the following structures.
- a predetermined number of packet selectors that select packets constituting each service stream from a multiplexed stream in which a plurality of service streams are multiplexed, and generate one service stream;
- a predetermined number of insertion units for inserting null packets with time information in which predetermined time information is added to a payload in an area vacated when a predetermined number of the packet selection units generate a stream of one service;
- a multiplexing unit that multiplexes a predetermined number of streams into which the null packets with time information are inserted by a predetermined number of the insertion units;
- a demultiplexing unit that demultiplexes the streams multiplexed by the multiplexing unit into a predetermined number of streams;
- a data processing apparatus comprising: an output timing adjustment unit that adjusts a timing at which the null packet with time information is output with reference to time information attached to the null packet with time information.
- the data processing device further including a clock generation unit that supplies time information generated with a constant clock to the insertion unit and the output timing adjustment unit.
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Abstract
Description
(1)
複数のサービスのストリームが多重化された多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択して、1つのサービスのストリームを生成する所定数のパケット選択部と、
所定数の前記パケット選択部により1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入する所定数の挿入部と、
所定数の前記挿入部により前記時刻情報付きヌルパケットが挿入された所定数のストリームを多重化する多重化部と、
前記多重化部により多重化されたストリームを所定数のストリームに多重分離する多重分離部と、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する出力タイミング調整部と
を備えるデータ処理装置。
(2)
前記出力タイミング調整部は、前記多重分離部の後段に、所定数に応じて設けられている
上記(1)に記載のデータ処理装置。
(3)
前記出力タイミング調整部は、前記多重分離部の前段に、1つだけ設けられている
上記(1)に記載のデータ処理装置。
(4)
前記挿入部は、元々のストリームに含まれている再生するタイミングを示す情報を有するパケットを検出し、検出したパケットから時間軸をさかのぼり最近傍の前記空いた領域に、前記時刻情報付きヌルパケットを挿入する
上記(1)から(3)までのいずれかに記載のデータ処理装置。
(5)
前記挿入部および前記出力タイミング調整部に対し、一定のクロックで生成した時刻情報を供給するクロック生成部
をさらに備える上記(1)から(4)までのいずれかに記載のデータ処理装置。
(6)
放送波に対する復号を行って多重化ストリームを取得する復調部と、
複数のサービスのストリームが多重化された前記多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択し、1つのサービスのストリームを生成する所定数のパケット選択部と、
所定数の前記パケット選択部により1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入する所定数の挿入部と、
所定数の前記挿入部により前記時刻情報付きヌルパケットが挿入されたストリームを多重化する多重化部と、
前記多重化部により多重化されたストリームを所定数のストリームに多重分離する多重分離部と、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する出力タイミング調整部と、
前記出力タイミング調整部から出力される前記ストリームに含まれる映像および音声を復号する復号部と
を備える受信装置。
(7)
複数のサービスのストリームが多重化された多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択して、1つのサービスのストリームを生成し、
1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入し、
前記時刻情報付きヌルパケットが挿入された所定数のストリームを多重化し、
多重化されたストリームを所定数のストリームに多重分離し、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する
ステップを含むデータ処理方法。
(8)
複数のサービスのストリームが多重化された多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択して、1つのサービスのストリームを生成し、
1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入し、
前記時刻情報付きヌルパケットが挿入された所定数のストリームを多重化し、
多重化されたストリームを所定数のストリームに多重分離し、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する
ステップを含むデータ処理をコンピュータに実行させるプログラム。
Claims (8)
- 複数のサービスのストリームが多重化された多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択して、1つのサービスのストリームを生成する所定数のパケット選択部と、
所定数の前記パケット選択部により1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入する所定数の挿入部と、
所定数の前記挿入部により前記時刻情報付きヌルパケットが挿入された所定数のストリームを多重化する多重化部と、
前記多重化部により多重化されたストリームを所定数のストリームに多重分離する多重分離部と、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する出力タイミング調整部と
を備えるデータ処理装置。 - 前記出力タイミング調整部は、前記多重分離部の後段に、所定数に応じて設けられている
請求項1に記載のデータ処理装置。 - 前記出力タイミング調整部は、前記多重分離部の前段に、1つだけ設けられている
請求項1に記載のデータ処理装置。 - 前記挿入部は、元々のストリームに含まれている再生するタイミングを示す情報を有するパケットを検出し、検出したパケットから時間軸をさかのぼり最近傍の前記空いた領域に、前記時刻情報付きヌルパケットを挿入する
請求項1に記載のデータ処理装置。 - 前記挿入部および前記出力タイミング調整部に対し、一定のクロックで生成した時刻情報を供給するクロック生成部
をさらに備える請求項1に記載のデータ処理装置。 - 放送波に対する復号を行って多重化ストリームを取得する復調部と、
複数のサービスのストリームが多重化された前記多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択し、1つのサービスのストリームを生成する所定数のパケット選択部と、
所定数の前記パケット選択部により1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入する所定数の挿入部と、
所定数の前記挿入部により前記時刻情報付きヌルパケットが挿入されたストリームを多重化する多重化部と、
前記多重化部により多重化されたストリームを所定数のストリームに多重分離する多重分離部と、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する出力タイミング調整部と、
前記出力タイミング調整部から出力される前記ストリームに含まれる映像および音声を復号する復号部と
を備える受信装置。 - 複数のサービスのストリームが多重化された多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択して、1つのサービスのストリームを生成し、
1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入し、
前記時刻情報付きヌルパケットが挿入された所定数のストリームを多重化し、
多重化されたストリームを所定数のストリームに多重分離し、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する
ステップを含むデータ処理方法。 - 複数のサービスのストリームが多重化された多重化ストリームから、それぞれのサービスのストリームを構成するパケットを選択して、1つのサービスのストリームを生成し、
1つのサービスのストリームを生成する際に空いた領域に、所定の時刻情報がペイロードに付与された時刻情報付きヌルパケットを挿入し、
前記時刻情報付きヌルパケットが挿入された所定数のストリームを多重化し、
多重化されたストリームを所定数のストリームに多重分離し、
前記時刻情報付きヌルパケットを出力するタイミングを、前記時刻情報付きヌルパケットに付与されている時刻情報を参照して調整する
ステップを含むデータ処理をコンピュータに実行させるプログラム。
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