WO2005096635A1 - 符号化信号蓄積配信システム、符号化信号選択転送装置、符号化信号分離送信装置、符号化信号受信合成装置 - Google Patents
符号化信号蓄積配信システム、符号化信号選択転送装置、符号化信号分離送信装置、符号化信号受信合成装置 Download PDFInfo
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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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6375—Control signals issued by the client directed to the server or network components for requesting retransmission, e.g. of data packets lost or corrupted during transmission from server
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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
- H04N21/21—Server components or server architectures
- H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
Definitions
- Coded signal storage / delivery system Coded signal selective transfer device, Coded signal separation / transmission device, Coded signal reception / synthesis
- the present invention relates to a coded signal storage / delivery system capable of performing scalable video transmission and storing the coded signal, a coded signal selective transfer device, a coded signal separation / transmission device, and a coded signal reception / synthesis device. It is.
- a standard for encoding a digital video and an accompanying audio is referred to as ISOZIEC 13818 (also known as “MPEG-2” (Moving Picture Expert Group Phase 2).
- MPEG-2 bit stream The bit stream conforming to the MPEG-2 standard (hereinafter referred to as “MPEG-2 bit stream”) generated in this manner is used in a wide range of fields such as communication and television broadcasting!
- MPEG The two-bit stream has a hierarchical structure, and the GOP starts from the highest sequence layer.
- each screen is saved in a frame memory, and a difference between frames is taken to reduce redundancy in a time axis direction. Further, by performing orthogonal transform processing such as discrete cosine transform (hereinafter abbreviated as “DCT”) on a plurality of pixels constituting each frame to reduce the redundancy in the spatial axis direction, the efficiency is improved. Video compression encoding is realized.
- DCT discrete cosine transform
- the encoded signal is sent to a decoder, decoded and reproduced.
- the decoder reproduces the screen, stores it in the first frame memory, predicts the next screen to be continued based on the difference information, stores it in the second frame memory, and displays the screen inserted between the two frames. Furthermore, a series of screens are constructed and a moving image is reproduced by making predictions. Such a method is called bidirectional prediction.
- three types of I picture, P picture and B picture are defined in order to realize the bidirectional prediction.
- An I picture is an abbreviation of an intra-coded picture, and is a screen that is coded as a still picture independently of other pictures.
- the P picture is an abbreviation of a forward predictive coding picture, and is a picture that is predictively coded based on an I or P picture located in the past in time.
- a B picture is an abbreviation of a bidirectional predictive encoding picture, and is predictively encoded based on a forward, backward or bidirectional picture using I or P pictures located before and after in time. It is a screen. That is, after the I picture and the P picture are first encoded, the B picture inserted between them is encoded.
- the MPEG-2 bit stream encoded by the encoder is transmitted at a predetermined transfer rate to a transmission path, input to a decoder on the transmission path, decoded and reproduced.
- the amount of information generated by coding a moving image is not constant.
- the amount of information increases at a stretch.
- TM5 (April, 1993) (hereinafter abbreviated as "TM5") describes a rate control method.
- step 1 bits are first allocated to each picture type based on the code amount R allocated to uncoded pictures in a GOP.
- the virtual buffer occupancy calculated based on the bit allocation is also calculated for the quantization scale used when performing the encoding process on a macroblock basis.
- MPEG-2 bitstreams having different compression formats and different transmission speeds are used.
- a moving picture compression coding signal converting apparatus for converting the video signal is required.
- a device for realizing this is a so-called transcoder.
- the image compression coded signal transmitted from the encoder is converted into an appropriate signal by a transcoder, and the signal is supplied to each decoder.
- FIG. 29 shows a first example of a general conventional transcoder 50.
- Conventional transcoder 50 Is connected to a first transmission line (not shown) having a first bit rate and receives a first MPEG-2 bit stream bl, a variable length decoding unit (VLD) 51, an inverse quantizer 53, a quantizer 55, a VLC 57 connected to a second transmission path (not shown) having a second bit rate and outputting a second MPEG-2 bit stream b2, and a rate control unit 59 for controlling the amount of code generated by the quantizer 55
- VLD variable length decoding unit
- the VLD 51 and the inverse quantizer 53 decode the first MPEG-2 bit stream bl up to the DCT coefficient region in macroblock units, and encode the obtained DCT coefficient signal by the quantizer 55 and the VLC 57. Then, a second MPEG-2 bit stream b2 having a smaller code amount than the first MPEG-2 bit stream is generated.
- the coefficient obtained by the DCT transform is divided by a predetermined quantization step. As a result, the image signal is compressed.
- This quantization step is obtained by multiplying a plurality of quantization matrix values included in a predetermined quantization table by a quantization scale.
- the transcoder 50 almost reuses the coding information of the sequence layer, GOP layer, picture layer, slice layer, and macroblock layer in the first MPEG-2 bit stream bl. Basically, only the conversion of the block layer DCT coefficients and the conversion of the macroblock layer code that needs to be modified with the block layer conversion are performed
- the rate control unit 59 uses the MPEG-2 T
- FIG. 30 shows a flowchart of a rate control process of the conventional transcoder 50. As shown in the figure, the conventional rate control process has steps A1 to A14.
- a variable n is set to 1.
- the variable n indicates a number assigned to a plurality of pictures included in the input image signal, and the n-th picture is hereinafter referred to as pic (n).
- indices Xi, Xp and Xb indicating the complexity of the I, P and B pictures are calculated by the following equations (al), (a2) and (a3).
- Si, Sp, and Sb are generated code amounts of I, P, and B pictures, respectively
- Qi, Qp, and Qb are quantized scale codes of all macroblocks in I, P, and B pictures, respectively.
- the screen complexity index Xi, Xp, and Xb is large for an image in which a large amount of encoded information is generated, that is, for an image with a low compression rate, and conversely, for an image with a high compression rate. Will be smaller.
- target_Bitrate is a target bit rate of the transcoder 50.
- the code amounts Ti, Tp and Tb to be allocated to the I, P and B pictures in the GOP are calculated by the following equations (a7), (a8) and (a9).
- Np and Nb indicate the numbers of uncoded P and B pictures, respectively, in the GOP.
- step A4 it is determined whether or not the variable n is 1. That is, it is determined whether the picture to be coded is the first picture pic (l). If it is the first picture, go to step A5. If it is not the first picture, go to step A6. In step A5, the code amount R to be assigned to the uncoded picture in the GOP when the first picture pic (l) in the GOP is coded is calculated by the following equation (alO).
- R target—Bitrate X NZpicture— rate + R... Equation (alO)
- N is the total number of pictures in the GOP
- picture_rate is a value indicating the time resolution of the input image, and indicates the number of screens decoded and displayed in one second.
- step A6 the code amount R allocated to the uncoded picture in the GOP is changed to the generated code of the I, P, and B pictures when the (n-1) th picture pic (nl) is coded. Based on the quantity Si, Sp, or Sb, update with any of the following formulas (all), (al2) and (al3).
- R R-Sb ... formula (al3)
- Steps A5 and A6 both proceed to step A7, and set 1 to a variable j.
- the variable j indicates a number assigned to a plurality of macroblocks in one picture, and the j-th macroblock is hereinafter referred to as MB (j).
- step A8 the occupation amounts di (j), dp (j) and db (j) of the virtual buffer when encoding the j-th macroblock MB (j) in the I, P and B pictures. ) Is calculated by the following equations (al4), (al5) and (al6).
- B (j ⁇ 1) is the generated code amount of all macroblocks up to the (j ⁇ 1) th macroblock MB (j ⁇ 1).
- di (0), dp (0), and db (0) are initial values of the virtual buffer occupancy of the I, P, and B pictures, respectively. 18) and equation (a 19), respectively.
- r is called a reaction parameter, and is represented by the following equation (a20), and controls the response speed of the feedback loop.
- the virtual buffer occupancy at the end of I, P, and B picture encoding that is, the virtual buffer occupancy di (NMB), dp (NMB) when the NMB-th macroblock MB (NMB) is encoded.
- db (NMB) are used as initial values di (0), dp (0), and db (0) of the virtual buffer occupancy at the next encoding for each picture type.
- the quantization scale code QG for the j-th macroblock MB (j) is calculated for each picture by the following equation (a21). ).
- step A10 the j-th macroblock MB (j) is quantized using the quantization scale code Q (j) calculated in step A9.
- the variable j is incremented, and the process proceeds to step A12 to determine whether the variable j exceeds the total number of macroblocks NMB.
- NMB is the total number of macroblocks included in the n-th picture pic (n). If variable j does not exceed the total number of macroblocks NMB, return to step A8. If the variable j exceeds the total number of macroblocks NMB, the process proceeds to step A13.
- variable j is also used as a loop counter for repeating the encoding process of steps A8 to A11.
- the variable j is also used as a loop counter for repeating the encoding process of steps A8 to A11.
- it is possible to sequentially perform the encoding process on all the macroblocks from the first macroblock MB (1) in the nth picture pic (n) to the NMBth macroblock MB (NMB). it can.
- step A13 the variable n is incremented, and the flow advances to step A14 to determine whether or not the variable n exceeds the total number NPIC of pictures to be coded. If the variable n does not exceed the total number of pictures NPIC, the process returns to step A2, and if the variable n exceeds the total number of pictures NPIC, the process ends.
- the first transcoder 50 since the first transcoder 50 cannot have information on the image structure such as the I and P picture periods, the first transcoder 50 uses an image such as the TM5 rate control shown in FIG. A method of allocating bits based on information such as the GOP structure cannot be performed unless the input image structure is assumed!
- the second conventional transcoder 60 includes, in addition to the configuration of the first conventional transcoder 50, a delay circuit 61, a bit rate ratio calculation unit 63, and an input code amount. It includes an integrating section 65, a difference code amount calculation section 67, a target output code amount update section 69, and a quantization scale code calculation section 71.
- FIG. 32 shows a processing flow of the transcoder 60 thus configured.
- the process of the transcoder 60 includes steps B1 to B13.
- Steps B6 to B13 are the same as steps A7 to A14 of the rate processing shown in the first conventional example.
- the virtual buffer occupancy is calculated based on the target output code amount Tout calculated by the target output code amount update unit 69.
- FIGS. 33 and 34 show a third example of a conventional transcoder.
- a third conventional transcoder 80 is connected to a first transmission line having a first bit rate, receives a VLD 81 that inputs an input bit stream b3, and a first conventional transcoder 50.
- 31 includes an inverse quantizer 53, a quantizer 55, and a VLC 57, and is the same as the transcoder 60 in FIG.
- a target output code amount updating unit 83 and a quantization scale code calculating unit 85 are examples of a target output code amount updating unit 83 and a quantization scale code calculating unit 85.
- the code amount is described in advance in the bit stream b3 as information, and rate control is performed based on the information.
- the transcoder uses the signal after the encoding process as a target, the original signal before the encoding cannot be known. Therefore, in the code amount control, attention is paid to the distortion newly generated by the requantization processing instead of the distortion of the image itself after the transcoding processing, and by suppressing this distortion, the deterioration of the image quality is suppressed. The amount of code must be reduced.
- the applicant of the present application considers the decoding quantization parameter and the quantization calculated in the preceding stage by considering the requantization rate distortion function that depends on the decoding quantization parameter and the requantization parameter first.
- a moving picture compression coded signal conversion method and apparatus for realizing the calculation of an optimal quantization parameter based on parameters, and a medium recording a conversion program (for example, Japanese Patent Application Laid-Open No. 2001-169283 (Europe corresponding to Europe). Patent Publication EP1067798).
- the quantization parameter switching unit for switching the quantization parameter, it is possible to minimize the error when converting the quantization coefficient area data into the requantization coefficient area data.
- the transcoder is a processor that realizes bit stream conversion into a form suitable for various use environments.
- bit rate scaling scheme As a technique for realizing scalability of generating and providing a video stream suitable for a usage environment in a network in which various bands are mixed, a bit rate scaling scheme and a hierarchical coding scheme exist.
- bit rate scaling transcoder installed in each router on a network
- stream conversion by bit rate reduction is realized according to a required bit rate. This enables video scalability to respond to network fluctuations. Yes.
- bit rate scaling transcoder itself performs rate control and stream conversion, a high level of processing is required for the router, so that a large load S is applied.
- the stream that is preliminarily input by the server is converted into a stream having a hierarchical structure, and scalability is realized by selecting a layer in a router. This eliminates the need for rate control by the transcoder and eliminates the load of signal processing and the like on each router on the network.
- each layer is given a priority, and there is a problem that it is necessary to perform control in consideration of the priority when selecting the layer.
- the present invention has been made to solve such a conventional problem.
- a separator in a server an independent separated stream is generated, and in a router having a band selection function, a network state is changed.
- a network state is changed.
- storing the stream with a router or the like, and distributing the router power storing the stream at the time of redistribution scalable video transmission is performed, and communication costs are reduced. It is an object of the present invention to provide a coded signal accumulation / delivery system, a coded signal selective transfer device, a coded signal separation / transmission device, and a coded signal reception / synthesis device capable of reducing the number of signals.
- the encoding / decoding signal accumulation / delivery system of the present invention converts a primary encoded signal obtained by encoding a primary moving image composed of a plurality of image information into a pseudo moving image of the primary moving image.
- a basic code signal having a code amount smaller than that of the primary code signal for restoring a next moving image, and a tertiary code closer to the primary video than the secondary video restored by the basic coded signal.
- a separation transmitter for separating and reconstructing a moving image into a plurality of transmission coded signals to be transmitted over a network while separating and reconstructing the plurality of extension coded signals for use and restoration with the basic coded signal; , Input the plurality of transmission coded signals, select a transfer destination, A selective transfer unit for transmitting the transmission coded signal; and a reception unit for inputting a plurality of transmission coded signals transmitted to the transmission path selector and combining a tertiary coded signal for restoring the tertiary video image And a synthesizer,
- the separating transmitter inputs the primary coded signal to a separator input unit, and converts the primary coded signal input by the separator input unit to the basic coded signal and the plurality of extension coding.
- a separator separating means for separating the basic coded signal and a plurality of the above-mentioned extended coded signals into an arbitrary combination and multiplexing to generate a plurality of transmission coded signals.
- a transfer receiving means for receiving the transmission coded signal from the separation transmitter, a transfer storage means for storing the transmission coded signal received by the transfer receiving means, the transmission code;
- a transmitter transmitting means for transmitting a converted signal to the reception synthesizer,
- a receiving unit that receives the transmission coded signal from the selective transfer unit and separates the basic coded signal and the extended coded signal from the transmission coded signal; Combiner separating means; combiner storage means for storing the basic coded signal and the extended coded signal separated by the combiner separating means in the receiving combiner; A combiner combining means for combining the extended coded signal with the extended coded signal to generate a tertiary coded signal for restoring a tertiary video, and a combiner for outputting the tertiary coded signal combined by the combiner combining means Output means, and a combiner re-distribution request transmitting means for transmitting a redistribution request of the transmission coded signal to the selective transfer device.
- Receive redistribution request for encoded signal Transferring means for transmitting the stored transmission code signal to the receiving combiner in accordance with the redistribution request, and combining the received combiner.
- Receiving means for receiving a transmission coded signal transmitted from the selective transfer device in accordance with the redistribution request.
- the selective transfer unit is configured to transmit and receive the transmission code received by the transfer unit receiving means.
- a transmitter storing signal selecting unit for selecting a transmission coded signal to be stored in the selective transfer unit from among the signals, wherein the transfer unit storing unit stores the selected transmission coded signal. It has a configuration.
- the transmission code transmitted from the transmission encoded signal by the selective transfer unit is selected.
- Transfer signal selecting means for selecting an encoded signal wherein the transfer means transmits the transmission coded signal selected by the transfer signal selecting means.
- the selective transmission unit transmits the transmission code signal transmitted by the transmission unit transmitting means.
- a transmitter transmission information storage unit for storing the transmission information of the non-transmitted transmission coding unit based on the stored transmission information when the transmitter transmission signal selection unit receives the redistribution request. It has a configuration characterized by selecting a signal.
- the reception / synthesizer outputs the transmission coded signal received by the synthesizer receiving means.
- a combiner reception information storage means for storing identification information to be distinguished from other transmission coded signals, and a synthesis means for searching for an unreceived transmission coded signal based on the identification information stored in the combiner reception information storage means
- Device non-received signal searching means wherein the combiner redistribution request transmitting means transmits a redistribution request of the unreceived transmission coded signal to the selective transfer device, and
- a re-distribution request receiving unit receives a re-distribution request in which the transmission code signal to be re-transmitted is specified from the reception combiner card, and the transfer unit transmission signal selection unit re-transmits in accordance with the re-delivery request.
- the transfer unit transmitting means comprises a
- the coded signal accumulation and distribution system of the present invention provides the coded signal storage device according to claim 5.
- the selective transfer device includes a redistribution request for a transmission coded signal other than the transmission coded signal stored in the selective transfer device in the redistribution request
- a transmission unit for transmitting a distribution request in place of the transmission-encoded signal redistribution request outside the storage, and a transmission unit that transmits the transmission-encoded signal redistribution request to the selective transmission unit.
- the receiving means has a configuration characterized in that the receiving means receives the transmission coded signal transmitted from the separation transmitter in accordance with the redistribution request.
- the transfer receiving means of the selective transfer device is configured such that: Receiving the transmission coded signal from a transmitter, the transferer transmitting means transmitting the transmission coded signal to the reception combiner or another selective transferer, and the transferer redistribution request receiving means Receives the redistribution request from the receiving combiner or another selective transfer device, and the transfer device redistribution request transmitting means transmits the redistribution request of the transmission coded signal outside the accumulation to another selective transfer. To the transmitter or the separated transmitter.
- the encoded signal accumulation / delivery system according to the present invention is the encoded signal accumulation / delivery system according to any one of claims 3 to 7, wherein
- the transmission signal selection means selects the transmission coded signal to be distributed according to the distribution band of the selective transfer device.
- the encoded signal accumulation / delivery system of the present invention uses a primary encoded signal obtained by encoding a primary video composed of a plurality of pieces of image information as a pseudo video of the primary video.
- a basic coded signal having a smaller code amount than the primary coded signal for restoring a secondary moving image; and a tertiary moving image closer to the primary moving image than the secondary moving image restored by the basic coded signal.
- the plurality of transmission coded signals are input, and a transfer destination is selected.
- the separating transmitter inputs the primary coded signal to a separator input unit, and converts the primary coded signal input by the separator input unit to the basic coded signal and the plurality of extension coding.
- a signal separating means for separating the signal into a plurality of signals; a separator storing means for storing the basic coded signal and the extended coded signal separated by the separator separating means; a plurality of the basic coded signals;
- a demultiplexer multiplexing means for multiplexing and arbitrarily combining the extension coded signal to generate a plurality of transmission coded signals; and a demultiplexer transmitting means for transmitting the transmission coded signal to the selective transfer device.
- a transfer receiving means for receiving the transmission coded signal from the separation transmitter, a transfer storage means for storing the transmission coded signal received by the transfer receiving means, the transmission code;
- a transmitter transmitting means for transmitting a converted signal to the reception synthesizer,
- a combiner receiving means for receiving the transmission coded signal from the selective transfer device, and a combiner storage means for storing the transmission coded signal received by the combiner reception means in the reception combiner;
- a combiner separating unit that separates the basic coded signal and the extended coded signal from the transmission coded signal, the basic coded signal, and some of the extended coded signals.
- a combiner combining means for generating a tertiary coded signal for combining and restoring a tertiary video, a combiner output means for outputting a tertiary coded signal combined by the combiner combining means, and the transmission coding
- a combiner redistribution request transmitting means for transmitting a signal redistribution request to the selective transfer device.
- the selective transfer device includes a transfer device re-distribution request receiving means for receiving the re-distribution request transmitted from the reception / synthesizer, wherein the transfer device transmitting device performs the transfer according to the re-distribution request. Transmitting the accumulated transmission coded signal, wherein the combiner receiving means of the reception combiner receives the transmitted coded signal transmitted by the selective transfer device according to the redistribution request. I have.
- the encoded signal storage and delivery system provides the encoded signal storage and delivery system according to claim 9.
- the selective transfer device when the selective transfer device includes a redistribution request for a transmission coded signal other than the transmission coded signal stored in the selective transfer device in the redistribution request, A transmission unit for transmitting a distribution request in place of the transmission-encoded signal redistribution request outside the storage, and a transmission unit that transmits the transmission-encoded signal redistribution request to the selective transmission unit. From the stored basic coded signal and the expanded coded signal, the transmission coded signal according to the redistribution request.
- the separator transmitting means transmits the generated transmission coded signal to the selective transfer device.
- Transfer receiving means of the selective transfer device transmits from the separation transmitter in accordance with the redistribution request. Sent And receiving the encoded transmission signal.
- the encoding / selecting signal selective transfer apparatus of the present invention converts a primary encoded signal obtained by encoding a primary moving image composed of a plurality of pieces of image information into a pseudo moving image of the primary moving image.
- a basic encoding signal having a smaller code amount than the primary encoding signal for restoring a certain secondary video, and the secondary video restored from the basic encoded signal is closer to the primary video than the primary video.
- Transfer receiver receiving means for receiving the generated transmission coded signal, transfer storage means for storing the transmission coded signal received by the transfer receiver reception means, and transfer transmitter transmitting means for transmitting the transmission coded signal And receiving a request for redistribution of the transmission coded signal. And a transmitter redistribution request receiving means, wherein the transmitter transmitting means transmits the accumulated transmission coded signal in accordance with the redistribution request.
- the encoding / selecting signal selective transfer device of the present invention is the same as the encoding / signal selecting / transferring device of claim 11, wherein the encoded signal transmitted and received by the transfer unit receiving means is transmitted. It has a transfer signal storage means for selecting a transmission coded signal to be stored from among them, and the transfer storage means has a configuration characterized by storing the selected transmission coded signal. .
- the encoding / selection signal selection / transfer device of the present invention provides the encoding / selection signal selection / transfer device according to claim 11.
- the transfer device further comprises a transfer device transmission signal selecting means for selecting a transmission coded signal to be transmitted from the transmission coded signals, wherein the transfer device transmission device selects the transmission signal selected by the transfer device transmission signal selection device. It has a configuration characterized by transmitting an encoded signal.
- the encoding / selecting signal selective transfer apparatus of the present invention is the same as the encoding / signal selecting / transferring apparatus of claim 13, wherein the transmission encoded signal transmitted by the transfer unit transmitting means is transmitted.
- a transmitter transmission information storage unit for storing transmission information wherein the transmitter transmission signal selection unit receives the re-distribution request and, based on the stored transmission information, transmits the untransmitted transmission code.
- the configuration is characterized in that the conversion signal is selected.
- the transmission coded signal to be retransmitted by the transferor redistribution request receiving means Receives the specified re-distribution request, the transferer transmission signal selecting means selects a transmission coded signal to be retransmitted in accordance with the re-distribution request, and the transferer transmission means It has a configuration characterized by transmitting the selected transmission coded signal.
- the transmission / encoding signal accumulated in the re-distribution request is transmitted to the encoding / selecting signal selecting / transferring device according to claim 15. If the request includes a redistribution request for a transmission coded signal other than a signal, the transferor redistribution request transmission means for transmitting the redistribution request in place of the redistribution request for the transmission coded signal outside the storage is transmitted. In addition, there is provided a configuration in which the transfer device receiving means receives a transmission coded signal according to the redistribution request.
- the transfer unit receiving means generates and transmits the transmission encoded signal.
- the transmitter transmitting means receiving the transmission coded signal and the transmission coded signal to restore a tertiary video 3
- the transfer device redistribution request receiving means receives the redistribution request from the receiving combiner or another selective transfer device.
- the transferor re-distribution request transmitting means stores the It has a configuration characterized by transmitting a redistribution request of an external transmission coded signal to another selective transfer device or the separation transmitter.
- the coded signal selective transfer device of the present invention is characterized in that, in the coded signal selective transfer device according to any one of claims 13 to 17, the transfer device transmission signal selecting means is provided. And (c) selecting the transmission encoded signal to be distributed according to the distribution band of the selective transfer unit.
- the encoded signal receiving / synthesizing apparatus of the present invention uses a primary encoded signal obtained by encoding a primary moving image composed of a plurality of pieces of image information as a pseudo moving image of the primary moving image.
- a basic encoding signal having a smaller code amount than the primary encoding signal for restoring a secondary video, and a tertiary closer to the primary video than the secondary video restored by the basic encoding signal.
- Combiner receiving means for receiving the encoded transmission coded signal, combiner separation means for separating the basic coded signal and the extended coded signal from the transmission coded signal, and the combiner separation means The basic coded signal and the extended coded signal separated by And a combiner for combining the basic coded signal and some of the extended coded signals to generate a tertiary coded signal for restoring a tertiary video image.
- the combiner receiving means receives a transmission coded signal according to the redistribution request.
- the encoding / reception signal receiving / synthesizing apparatus of the present invention converts a primary encoded signal obtained by encoding a primary moving image composed of a plurality of pieces of image information into a pseudo moving image of the primary moving image.
- a basic coding signal having a smaller code amount than the primary coding signal for restoring a certain secondary video, and the primary moving image closer to the secondary video restored by the basic coding signal.
- Combiner receiving means for receiving the multiplexed transmission coded signal; Synthesizing means for accumulating the transmission coded signal received by the transmitting means; synthesizing means for separating the basic coded signal and the extended coded signal from the transmission coded signal;
- a combiner output means for outputting a next encoded signal; and a combiner redistribution request transmitting means for transmitting a redistribution request for the transmission encoded signal, wherein the combiner receiving means responds to the redistribution request. It has a configuration characterized by receiving a transmission code signal according to the above.
- the coded signal receiving / synthesizing apparatus is the coded signal receiving / synthesizing apparatus according to claim 19 or 20, wherein the coded signal receiving / synthesizing apparatus receives the coded signal received by the synthesizer receiving means.
- a combiner reception information storage unit for storing identification information to be distinguished from other transmission encoded signals, and a search for an unreceived transmission encoded signal based on the identification information stored in the combiner reception information storage unit.
- a combiner non-received signal search unit wherein the combiner redistribution request transmitting unit transmits a redistribution request for the unreceived transmission coded signal.
- the coded signal separation / transmission apparatus of the present invention comprises: a separator input means for inputting a primary coded signal obtained by coding a primary moving image composed of a plurality of pieces of image information; A primary coded signal having a smaller code amount than the primary coded signal for restoring a secondary moving image which is a pseudo moving image of the primary moving image, Separation into a plurality of extended coded signals to be restored by using a tertiary moving image closer to the primary moving image than the secondary moving image restored by a basic coded signal together with the basic coded signal Separator multiplexing means for multiplexing arbitrarily combining the basic coded signal and the plurality of extended coded signals to generate a plurality of transmission coded signals; and Demultiplexer that stores the transmission coded signal multiplexed by the demultiplexer It has a configuration characterized by comprising storage means and separator transmitting means for transmitting the transmission coded signal.
- the coded signal separating / transmitting apparatus of the present invention provides a coded signal separating / transmitting apparatus according to claim 22, which receives the request for redistribution of the transmission coded signal.
- Arrangement Communication request receiving means wherein the separator transmitting means transmits the accumulated transmission coded signal in accordance with the redistribution request.
- the coded signal demultiplexing and transmitting apparatus of the present invention comprises: a demultiplexer input means for inputting a primary coded signal obtained by coding a primary moving image composed of a plurality of pieces of image information; A primary encoded signal input by the input means, a basic encoded signal having a smaller code amount than the primary encoded signal for restoring a secondary moving image which is a pseudo moving image of the primary moving image, A plurality of extended coded signals that are restored using the tertiary video closer to the primary video than the secondary video restored by the basic coded signal together with the basic coded signal; A separating unit, a separating unit storing unit that stores the basic coded signal and the extended coded signal separated by the separating unit, the basic coded signal, and a plurality of the extended coded signals. Multiplexing and combining multiple Has a separator multiplexing means for generating a separator transmitting means for transmitting said transmission coded signal, a configuration in which, comprising the a.
- a coded signal separation / transmission apparatus provides a coded signal separation / transmission apparatus according to claim 24, which receives the re-transmission request for the transmission coded signal.
- a redistribution request receiving unit wherein the separator multiplexing unit generates the transmission code signal according to the redistribution request from the stored basic coded signal and the extended coded signal,
- the separator transmitting means transmits the generated transmission coded signal.
- the coded signal storage / delivery method and the coded signal storage / delivery program of the present invention provide a coded signal storage / distribution program that converts a primary coded signal obtained by coding a primary moving image composed of a plurality of pieces of image information into a primary coded signal.
- a plurality of extended coded signals which are restored by using a tertiary moving image close to a moving image together with the basic code signal, and are reconstructed and reconstructed, and a plurality of transmission coding signals transmitted over a network.
- a separate transmitter control step for controlling a separate transmitter for converting the signal into a signal, and a selection for inputting the plurality of transmission coded signals, selecting a transfer destination, and controlling a selected transfer apparatus for transmitting the transmission coded signal.
- the separating transmitter control step includes the steps of: a separator input step for inputting the primary encoded signal; and a primary encoded signal inputted in the separator input step, the basic encoded signal; A separator separating step of separating the plurality of extension coded signals into a plurality of extension coded signals; multiplexing the base coded signal and the plurality of extension coded signals in an arbitrary combination to form a plurality of transmission coded signals; A demultiplexer multiplexing step for generating, a demultiplexer accumulating step for accumulating the transmission coded signal multiplexed in the demultiplexer multiplexing step, and a demultiplexer transmission step for transmitting the transmission coded signal to the selective transfer unit And
- the receiving combiner controlling step includes: a combiner receiving step of receiving the transmission code signal by the selective transfer device power; and the transmission coded signal, the basic coded signal, and the extended coded signal.
- the selective transfer device control step includes a transfer device redistribution request receiving step of receiving a redistribution request of a transmission coded signal transmitted from the reception combiner, and the transfer device transmitting step includes: In accordance with the redistribution request, the stored transmission code signal is transmitted to the receiving / synthesizing unit, and the combining / receiving unit in the receiving / synthesizing control step transmits from the selective transfer unit according to the redistribution request.
- Transmission code It has a configuration characterized by receiving a signal.
- the selective transfer unit control step includes the step of transmitting the coded signal received in the transfer unit receiving step.
- the selective transfer unit control step includes the step of transmitting from among the transmission coded signals.
- the selective transfer unit control step includes: A transmitter transmission information storing step of storing transmission information of a signal, wherein the transmitter transmission signal selecting step includes the step of, when receiving the redistribution request, the transmission code that has not been transmitted based on the stored transmission information. It has a configuration characterized by selecting a conversion signal.
- the reception / synthesizer control step includes the step of transmitting and receiving the encoded signal received in the combiner receiving step.
- a combiner non-received signal search step for searching wherein the combiner re-distribution request transmitting step transmits a redistribution request of the unreceived transmission coded signal to the selective transfer device, and the selective transfer device control Receiving the retransmission request in which the transmission code to be retransmitted is specified, from the reception combiner card, and selecting the transmission signal from the retransmitter.
- a transmission coded signal to be retransmitted is selected according to a request, and the transmitter transmitting step transmits the transmission coded signal selected in the transmitter transmission signal selecting step. It has a characteristic configuration.
- the selective transfer unit control step includes the selective transmission in the re-delivery request. If the request includes a redistribution request for a transmission coded signal other than the transmission coded signal stored in the storage device, the request for redistribution is replaced with a request for redistribution of the transmission coded signal outside the storage.
- the separator transmitting step transmits the accumulated transmission coded signal to the selective transfer device according to the redistribution request, and the transfer receiving step power of the selective transfer device control step is used to perform the separation according to the redistribution request.
- Sending Has a structure obtained by and receives the transmission encoded signal transmitted from the vessel.
- the transfer receiving step in the selective transfer control step is the separation transmitter or the separated transmitter.
- the request receiving step receives the redistribution request from the reception combiner or another selective transfer unit, and transmits the transfer unit redistribution request transmission step. It has a configuration characterized in that transmission is performed to a selective transfer device or the separation transmitter.
- the encoded signal accumulating / distributing method according to the present invention further includes:
- the transmitter transmission signal selection step is characterized in that the transmission coded signal to be distributed is selected according to the distribution band of the selected transmitter.
- the encoding / decoding signal accumulation / delivery method and the encoding / decoding signal accumulation / distribution program of the present invention provide a method for encoding a primary encoded signal obtained by encoding a primary moving image composed of a plurality of pieces of image information.
- a tertiary moving image closer to the primary moving image than the moving image is separated into a plurality of extended coded signals to be restored by using the basic coded signal together with the basic code signal, reconstructed, and transmitted over a network.
- the separating transmitter control step includes the steps of: a separator input step for inputting the primary encoded signal; and a primary encoded signal inputted in the separator input step, the basic encoded signal; A separator separating step of separating the plurality of extended coded signals into a plurality of extended coded signals; a separator storing the basic coded signal and the extended coded signal separated in the separator separating step; Multiplexing a signal and a plurality of the extension coded signals in any combination to generate a plurality of transmission coded signals; and a demultiplexer for transmitting the transmission coded signal to the selective transfer unit.
- Device transmission step includes the steps of: a separator input step for inputting the primary encoded signal; and a primary encoded signal inputted in the separator input step, the basic encoded signal; A separator separating step of separating the plurality of extended coded signals into a plurality of extended coded signals; a separator storing the basic coded signal and the extended coded signal separated in the separator separating
- the receiving / synthesizer controlling step includes: a synthesizing unit receiving step of receiving the transmission code signal by the selective transfer unit power; and a synthesizing unit for storing the transmission coded signal received in the synthesizing unit receiving step in the reception synthesizer.
- a storage unit a synthesizer separating step of separating the basic coded signal and the extended coded signal from the transmission coded signal; a basic coded signal; and some of the extended coded signals.
- a combiner for generating a tertiary coded signal for restoring a tertiary video, and a combiner output step for outputting a tertiary coded signal combined in the combiner combining step. Transmitting a redistribution request for the transmission coded signal to the selective transfer unit, And
- the selective transfer device control step includes a transfer device redistribution request receiving step of receiving a redistribution request transmitted from the receiving / synthesizing device, wherein the transfer device transmission step is performed in accordance with the redistribution request. Transmitting the accumulated transmission coded signal, wherein the combiner receiving step of the reception combiner control step receives the transmission coded signal transmitted from the selective transfer unit in accordance with the redistribution request. It has a configuration as follows.
- the selective transfer unit control step includes the selective transmission in the re-delivery request. If the request includes a redistribution request for a transmission coded signal other than the transmission coded signal stored in the storage device, the request for redistribution is replaced with a request for redistribution of the transmission coded signal outside the storage.
- a transmitter re-distribution request transmitting step for transmitting the demultiplexing transmitter control step includes a demultiplexer re-distribution request receiving step for receiving the re-transmission request of the transmission code transmission signal by the selective transmitting device,
- the demultiplexer multiplexing step generates the transmission coded signal according to the redistribution request from the stored basic coding signal and the extended coding signal, and the demultiplexer transmitting step generates the transmission coded signal.
- Transmission code Signal to the selective transmitter, and the transmitter receiving step of the selective transmitter control step receives a transmission code signal transmitted from the separation transmitter in accordance with the redistribution request. It has the configuration described above.
- the encoded signal selective transfer method and the encoded signal selective transfer program of the present invention provide a primary encoded signal obtained by encoding a primary moving image composed of a plurality of pieces of image information, A basic coded signal having a smaller code amount than the primary coded signal for restoring a secondary moving image that is a pseudo moving image of a moving image, and the primary coded signal from the secondary moving image restored by the basic coded signal.
- the coded signal selective transfer method and the coded signal selective transfer program of the present invention are as follows: the coded signal selective transfer method according to claim 36, or the coded signal selective transfer program according to claim 49 A transfer device storing signal selecting step of selecting a transfer coded signal to be stored from the transfer coded signals received in the transfer device receiving step, wherein the transfer device storing step includes selecting the transfer code. A configuration characterized by storing the converted signal.
- the coded signal selective transfer method and the coded signal selective transfer program according to the present invention are the coded signal selective transfer method according to claim 36, or the coded signal selective transfer program according to claim 49.
- the coded signal selective transfer method and the coded signal selective transfer program according to the present invention comprise the coded signal selective transfer method according to claim 38 or the coded signal selective transfer program according to claim 51
- the coded signal selective transfer method and the coded signal selective transfer program of the present invention are the coded signal selective transfer method according to claim 38, or the coded signal selective transfer program according to claim 51.
- the transferor re-distribution request receiving step receives a re-distribution request in which the transmission coded signal to be retransmitted is specified
- the transfer device transmission signal selecting step includes a transmission code re-transmission in accordance with the re-distribution request. Selecting a dangling signal, wherein the transmission unit transmitting step selects the transmission code selected in the transmission unit transmission signal selecting step. It has a configuration characterized by transmitting an encoded signal.
- the coded signal selective transfer method and the coded signal selective transfer program according to the present invention are the coded signal selective transfer method according to claim 40 or the coded signal selective transfer program according to claim 53
- the redistribution request is transmitted outside the storage.
- the encoded signal selective transfer method and the encoded signal selective transfer program of the present invention provide the encoded signal selective transfer method according to any one of claims 38 to 41, 55.
- the coded signal reception / synthesis method and the coded signal reception / synthesis program of the present invention provide a coded signal reception / synthesis program that converts a primary coded signal obtained by coding a primary moving image composed of a plurality of pieces of image information into the primary A basic coded signal having a smaller code amount than the primary coded signal for restoring a secondary moving image that is a pseudo moving image of a moving image, and the primary coded signal from the secondary moving image restored by the basic coded signal.
- a plurality of extended coded signals to be restored by using a tertiary moving image close to a moving image together with the basic coded signal, and the basic coded signal and the plurality of extended coded signals are separated from each other.
- the synthesizer separating step A combiner accumulating step of accumulating the basic coded signal and the extended coded signal separated by the above, and combining the basic coded signal and some of the extended coded signals to restore a tertiary video
- the generator receiving step includes a step of receiving a transmission code signal according to the redistribution request.
- the encoded signal receiving / synthesizing method and the encoded signal receiving / synthesizing program of the present invention include a method for encoding a primary encoded signal obtained by encoding a primary moving image composed of a plurality of pieces of image information.
- a plurality of extended coded signals to be restored by using a tertiary moving image close to the primary moving image together with the basic code signal, and the basic coded signal and the plurality of extended coded signals are separated from each other.
- the coded signal separation / transmission method and the coded signal separation / transmission program of the present invention input a primary coded signal obtained by coding a primary moving image composed of a plurality of image information cards.
- a plurality of base encoded signals and a plurality of tertiary moving images closer to the primary moving image than the secondary moving image restored by the basic coded signal are restored together with the basic encoded signal.
- the coded signal separation / transmission method and the coded signal separation / transmission program of the present invention input a primary coded signal obtained by coding a primary moving image composed of a plurality of image information cards.
- a plurality of base encoded signals and a plurality of tertiary moving images closer to the primary moving image than the secondary moving image restored by the basic coded signal are restored together with the basic encoded signal.
- the transmission code received in the combiner receiving step is provided.
- the coded signal separation and transmission program according to the present invention is the coded signal separation and transmission program according to claim 59, wherein the demultiplexer redelivery request reception receiving the retransmission request of the transmission coded signal is performed. And transmitting the stored transmission coded signal in accordance with the redistribution request.
- the coded signal separation and transmission program of the present invention is the coded signal separation and transmission program according to claim 61, wherein the coded signal separation and transmission program receives the re-distribution request of the transmission coded signal.
- a receiver re-distribution request receiving step wherein the demultiplexer multiplexing step generates the transmission coded signal according to the re-distribution request from the stored basic coded signal and the extended coded signal.
- the separator transmitting step includes transmitting the generated transmission code signal.
- FIG. 1 is a block diagram of an encoding / decoding signal accumulation / delivery system according to a first embodiment of the present invention.
- FIG. 2 is a block diagram showing an outline of processing (processing in a server) of the code-sharing signal accumulation / delivery system.
- FIG. 3 is a block diagram showing an outline of a process (distribution process from Sanoku to a receiver) of the encoding / decoding signal accumulation / delivery system.
- FIG. 4 is a block diagram showing an outline of processing of an encoded signal accumulation / delivery system (re-delivery processing between a router and a receiver).
- FIG. 5 is a block diagram showing a relationship between a server separator and a server storage.
- FIG. 6 is a block diagram showing a relationship between a server separator and a server storage.
- FIG. 7 is a block diagram showing a multiplexing method of a multiplexing unit of a demultiplexer in method 1 (with a robustness transmission path).
- FIG. 8 is a block diagram showing a multiplexing method of a multiplexing unit of a demultiplexer in method 2 (no robustness transmission path).
- FIG. 9 is a block diagram showing a router of the present invention.
- FIG. 10 is a block diagram showing control by a storage control switch box and a switch controller of the transmission path selector.
- FIG. 11 is a block diagram showing control by a band selection control switch box and a switch controller of a transmission path selector.
- FIG. 12 is a diagram showing an example of values taken by Rs in a switch controller of a transmission line selector.
- FIG. 13 is a diagram illustrating an example of transmission path selection in a transmission path selector under the control of a switch controller.
- FIG. 14 is a diagram showing a relationship between switch values and accumulation and transmission states in the example of FIG. 13.
- FIG. 15 is a block diagram showing an example of redelivery processing (first transmission from a router to a receiver) using a register of a switch controller of a router.
- FIG. 16 is a block diagram showing an example of re-delivery processing (requesting a receiver power to a router) using a register of a switch controller of the router.
- FIG. 17 is a block diagram showing an example of a redistribution process (second transmission from the router to the receiver) using the register of the switch controller of the router.
- FIG. 18 is a diagram showing a relationship between a distribution operation between a router and a receiver and a register value.
- FIG. 19 is a block diagram showing a relationship between a combiner of a receiver and a receiver accumulator.
- FIG. 20 is a block diagram showing a relationship between a combiner of a receiver and a receiver accumulator.
- FIG. 21 is a block diagram showing a demultiplexing unit and a basic stream selector in scheme 1.
- FIG. 22 is a block diagram showing a demultiplexing unit and a basic stream selector in scheme 2.
- FIG. 23 is a diagram showing a relationship between a distribution operation between a router and a receiver and a register value.
- FIG. 24 is a block diagram showing a separation unit of the separator.
- FIG. 25 is a block diagram showing a synthesis unit of the synthesizer.
- Fig. 26 is a block diagram illustrating an example of transmission path selection by a transmission path selector that inputs separated streams having different rates.
- FIG. 27 is a block diagram illustrating a codec signal accumulation / delivery system (first-time stream distribution) that performs multi-stage transmission.
- Fig. 28 is a block diagram illustrating a coded signal accumulation / delivery system (stream search on a transmission path) that performs multi-stage transmission.
- FIG. 29 is a schematic block diagram of a conventional transcoder.
- FIG. 30 is a flowchart showing a rate control process of TM5 of MPEG-2 in a conventional transcoder.
- FIG. 31 is a schematic block diagram of a conventional transcoder.
- FIG. 32 is a flowchart showing processing of a conventional transcoder.
- FIG. 33 is a schematic block diagram of a conventional transcoder.
- FIG. 34 is a flowchart showing processing of a conventional transcoder.
- the encoding / decoding signal accumulation / delivery system of the present invention uses a transcoder having a stream separation function in a server to generate an independent separated stream and a router having a band selection function to transmit a transmission path according to a network state in a router having a band selection function.
- a transcoder having a stream separation function in a server to generate an independent separated stream
- a router having a band selection function to transmit a transmission path according to a network state in a router having a band selection function.
- scalable video transmission is realized.
- the scalability can be realized by selecting an arbitrary transmission path in the router, where the priority of each separated stream is almost equal.
- the encoding / decoding signal accumulation / delivery system according to the present embodiment, in particular, the demultiplexing process in the server, the multiplexing process, the multiplexing process in the receiver, and the like are disclosed in Japanese Patent Application No. This is performed by using the processing of the encoding / decoding signal separation / synthesis system of 381859.
- FIG. 1 shows and describes the encoding / decoding signal accumulation / delivery system according to the first embodiment of the present invention.
- the coded signal accumulation / delivery system includes a server 1000 for transmitting a coded stream (transmission coded signal) for video reproduction, and a router 2000 for selecting a transmission path on a network.
- a server 1000 for transmitting a coded stream (transmission coded signal) for video reproduction
- a router 2000 for selecting a transmission path on a network.
- Recino 3000a, 3000b *, and 3000 ⁇ that receive and combine a plurality of encoded streams (transmission encoded signals).
- Resino 3000a, 3000b ⁇ ⁇ ⁇ 3000 ⁇ may be any number.
- a plurality of routers 2000 may be provided. An example in which a plurality of routers 2000 are provided will be described in another embodiment.
- the encoded streams synthesized and decoded by the receivers 3000a, 3000b ⁇ ⁇ ⁇ 3000 ⁇ are reproduced as images by the displays 4000a, 4000b- ⁇ ⁇ 4000 ⁇ , respectively.
- the encoded stream input to server 1000 is an encoded stream generated by a standard encoder.
- an image captured by camera 600 is encoded by encoder 700 into an encoder.
- the server 1000 includes a separator 1010 and a server storage 1040, and the router 2000 includes a transmission path selector 2010 and a router storage 2040 as a transmitter transmission information storage unit.
- the Recinos 3000a, 3000b ..., 3000 ⁇ are provided with combiners 3010a, 3010b ⁇ , 3010 ⁇ , decoders 3030a, 3030b..., 3030 ⁇ , and Recino accumulators 3040a, 3040b- ⁇ , 3040 ⁇ , respectively.
- Resino 3000a, 3000b * ⁇ ⁇ , 3000 ⁇ Decoding with decoders 3030a, 3030b ⁇ ⁇ ⁇ , 3030 ⁇ conforms to standard ones.
- Recino 3000a, 3000b..., 3000 ⁇ , synthesizers 3010a, 3010b..., 3010n, decoders 3030a, 3030b- ⁇ , 3030 ⁇ , and Recino accumulators 3040a, 30 ink..., 3040 ⁇ are similar to each other.
- a receiver 3000 a combiner 3010 as a combiner redistribution request transmitting means and a combiner non-received signal search means, a decoder 3030, and a receiver as a combiner reception information storage means.
- This will be described as a storage device 3040.
- the displays 4000a, 400 ( ⁇ ⁇ , 4000 ⁇ ) are the same, respectively, and one of them is referred to as the display 4000.
- an encoding stream is also input to encoder 700 and the like.
- a separator 1010 separates the encoded stream into a plurality of separated streams (transmission encoded signals; Stl to St6). Then, the plurality of separated streams (Stl to St6) are stored in the server storage 1040.
- server 1000 transmits the separation streams (Stl to St6) stored in server storage 1040 to norator 2000.
- Sano 1000 receives the transmitted separation stream (Stl to St6).
- the router 2000 selects the separated streams (Stl, St3, St5, St6) to be stored in the router 2000 from the received separated streams (Stl to St6) and stores them in the router storage unit 2040.
- the router 2000 selects the separated streams (St2, St4) to be transmitted from the router 2000 from the received separated streams (Stl to St6) and transmits them to the receiver 3000.
- the band between the router 2000 and the receiver 3000 is a narrow band. In other words, Sano 1000 and router 2000 The bandwidth between the router 2000 and the receiver 3000 is narrower.
- the receiver 3000 receives the separated streams (St2, St4) transmitted from the router 2000. Then, the receiver 3000 accumulates the received separated streams (St2, St4) in the receiver accumulator 3040. Also, the receiver 3000 combines the received separated streams (St2, St4) with the combiner 3010, generates a combined stream, and decodes the generated combined stream with the decoder 3030, so that the image on the display 4000 is displayed. Can play
- the router 2000 selects and acquires a separated stream (Stl, St3) to be redistributed from the router storage 2040 according to the request and the distribution band transmitted from the Resino 4000 power. Then, the router 2000 transmits the obtained separated stream (Stl, St3) to the Resino 3000.
- the receiver 3000 receives the separated stream (Stl, St3) transmitted this time from the router 2000. Then, the receiver 3000 combines the received separated streams (Stl, St3) and the separated streams (St2, St4) already stored in the receiver accumulator 3040 with a combiner 3010 to generate a combined stream. I do.
- the generated combined stream is decoded by the decoder 3030, so that a higher quality video than the previous one can be reproduced on the display 4000.
- each of the server 1000, the router 20000, and the receiver 3000 since each of the server 1000, the router 20000, and the receiver 3000 has an accumulation function, only the encoded stream that is sufficient for the redelivery request is transmitted. Then, it can be decoded and combined with the encoded stream already received by the receiver 3000, so that high-quality video can be restored and played back simply by transmitting and receiving a small-sized encoded stream. Can be.
- the separator 1010 receives an encoded stream already encoded and stored in an archive or the like and an encoded stream captured and encoded by a camera. Then, it is separated into independent encoded streams and output. Further, the separator 1010 includes a separator (separateU 100) as a separator input unit and a separator separator, and a multiplexing unit (MUX) 1600 as a separator multiplexer and a separator output unit. .
- a separator separatateU 100
- MUX multiplexing unit
- the encoded stream accumulated in the server accumulator 1040 as a separator accumulator is output from the multiplexing unit 1600, and is directly transmitted from the server 1000. Alternatively, they are the basic stream B and the extended stream E (m) (in the case of FIG. 6) separated by the separation unit 1100 and not multiplexed by the multiplexing unit 1600.
- the method of generating a separated stream by the demultiplexer 1010 includes the following two methods depending on the processing in the multiplexing unit 1600, and the processing diagrams of each method are shown in FIGS. 7 and 8, respectively.
- Video is transmitted over a network having a robustness transmission path.
- Method (2) Video is transmitted over a network without a robustness transmission path.
- the separation unit (l lOO) converts the input coded stream into one elementary stream B.
- the multiplexing unit (MUX) 1600 converts the multiplexing of the basic stream B output from the demultiplexing unit 1100 and the extended stream E (m) (0 ⁇ m ⁇ M-1) into the characteristics of the transmission path. Perform according to.
- the method includes the following method (1) and method (2).
- St (0) and L streams St (l) are output as separated streams.
- the basic stream B is sent out as a separated stream St (0) to the mouth bustness transmission line where no transmission error occurs, and the extended streams E (m) (0 ⁇ m ⁇ M-1) are respectively separated streams St (l) (1 ⁇ 1 ⁇ L-1).
- St (l) is shown in the following equation (1).
- bit rate Rate [St (l)] of the first separated stream St (l) is represented by the following expression (2).
- L streams St (l) (0 ⁇ l ⁇ L-1) are output.
- Elementary stream B is copied and multiplexed into all extension streams E (m).
- the separation stream St (l) can be represented as the following equation (3).
- Multiplex ['] means multiplexing.
- the router 2000 includes a transmission path selector 2010, a switch controller 2020, and a router accumulator 2040 as a transfer accumulator, and the L separated streams output from the server 1000.
- St (l) is input, and the rate of the stream to be transmitted is controlled by selecting the transmission path (on / off of the transmission path) according to the network conditions, thereby realizing the scalability of the video and storing the separated stream St (l). Is selected and stored in the router storage device 2040.
- the transmission path selector 1010 has a video storage function
- the storage path and the presence or absence of transmission are controlled by switches for each stream, so that the transmission path selector 1010 functions as a transmitter receiving unit and a transmitter storage signal selecting unit.
- An accumulation control switch box 2300 and a band selection control switch box 2400 as a transmitter transmitter and a transmitter transmission signal selector are provided.
- the storage control switch box 2300 is controlled by the switch controller 2020, selects the separated stream St (l) to be output to the router storage 2040, and the band selection control switch box 2400 is controlled by the switch controller 2020, This is for selecting the separated stream St (l) to be transmitted to the receiver 3000.
- Rate [St out] ⁇ Rtarget St Turn on the transmission line switch of 1).
- the switch controller 2020 has two registers, and controls the accumulation control switch box 2300 and the band selection control switch box 2400 according to the values of the respective registers.
- FIG. 10 shows the configuration of the accumulation control switch box 2300 and the control by the switch controller 2020
- FIG. 11 shows the configuration of the band selection control switch box 2400 and the control by the switch controller 2020.
- the value of the register in the switch control function is represented by Rt or a binary number.
- R is composed of L digits, and each bit corresponds to each state of Sw (0), Sw (l) ⁇ , and Sw (L-1) in order from the MSB (most significant bit) side.
- the value of the register of the accumulation control switch be Rs
- the value of the register of the band selection control switch be Rd.
- the switch controller 2020 has a register Rs and a register Rd, and the storage control switch box 2300 and the band selection control switch box 2400 To select the separated stream St (l) to be stored and the separated stream St (l) to be transmitted, respectively.
- the corresponding switch of the accumulation control switch box 2300 is set to “0”.
- the corresponding switch of the accumulation control switch box 2300 is set to the "1" side. That is, the separation stream St (l) is output to the router storage 2040.
- the router storage 2040 stores the separated stream St (l) output from the storage control switch box 2300.
- the corresponding switch of the band selection control switch box 2400 is set to “0”.
- the separation stream St (l) is not output and the value of the register Rs of the switch controller 2020 is “1”
- the corresponding switch of the band selection control switch box 2400 is set to the “1” side. That is, the separation stream St (l) is transmitted to the receiver 3000.
- FIG. 13 shows a specific example of transmission path selection in transmission path selector 2010 under the control of switch controller 2020.
- FIG. 14 shows the relationship between the switch values and the storage and transmission states in FIG.
- the storage control switch box 23 For storage, by turning on Sw (0), Sw (3), and Sw (4), the storage control switch box 23 s s s
- the separated streams St (0), St (3), and St (4) are selected and stored in the router storage unit 2040.
- the target rate Rtarget is given, turn on Sw (0), Sw (2), Sw (3), and Sw (5) to achieve Rate [St out] ⁇ Rtarget.
- the separated streams St (0), St (2), St (3), and St (5) are selected in the band selection control switch box 2400, and Rate (St (0) + St (2) + St (3) + St (5)] ⁇ Rtarget.
- FIGS. 15 to 17 show an example of redelivery processing of the separated stream St (1) using the registers Rs and Rd in the switch controller 2020 in the router 2000.
- FIG. 18 shows the relationship between the distribution operation between the router 2000 and the receiver 3000 and the register value Rd.
- the available bandwidth of the line between the router 2000 and the receiver 3000 is limited to two streams.
- the router 2000 selects the separated stream St (1) to be transmitted according to the band distributed to the receiver 3000 from the separated streams St (0) to St (5) distributed from the server 1000. Find the value of Rd.
- Rd the number of bits in the register Rd, Sw (0) and Sw (3), are selected.
- the band selection control switch box 2400 of the switch controller 2020 and the transmission path selector 2010 is controlled to select the separated streams St (0) and St (3). Then, the selected separated streams St (0) and St (3) are transmitted from the router 2000 to the receiver 3000 as the first transmission. In the receiver 3000, storing the received separated string over beam St and (0) St (3) into the receiver accumulator 3 040.
- the first request is transmitted so that the separated stream St (1) is further distributed from the receiver 3000.
- the router 2000 Upon receiving the first request from the receiver 3000, the router 2000 searches for Rd and searches the router storage 2040 for a stream whose Rd bit is 0 (St (1), St (2), St (2)). 4), St (5)).
- the separated streams St (1) to be transmitted according to the band distributed from the searched separated streams St (1), St (2), St (4), and St (5). Select).
- the separated streams St (1) and St (5) are selected, read from the router storage 2040, and transmitted to the receiver 3000 as the second transmission.
- the switch controller 2040 sets 1 to Rd Sw (1) and Sw (5).
- the separated streams St (1) and St (5) delivered from the data stream 2000 are received by the synthesizer 3010, and are stored in the received separated streams St (l) and St (5) and the receiver storage 3040. And the separated streams St (0) and St (3).
- the second request is transmitted from the receiver 3000. In this way, by repeating the request, all the separated streams St (1) can be received by the receiver 3000.
- the combiner 3010 of the receiver 3000 combines the input L and book streams St (l) and outputs a combined stream.
- the video quality of the composite stream depends only on the total rate of the stream to be received, not on the type of the received stream.
- the total rate of the stream to be received is determined by the transmission path selection in Router 2000. Determined.
- the combiner 3010 includes a demultiplexer (DEMUX), a basic stream selector (B-Selector), and combiners as combiner combining means and combiner output means.
- the multiplexing / demultiplexing unit and the basic stream selector are combined to form a multiplexing basic selector 3090 as a combiner receiving means and a combiner separating means.
- the configuration of the combining controller 3020 and the receiver storage unit 3040 as the combining unit storage means may be included in the combining unit 3010.
- the synthesis controller 302 0 has a register Rm of L digits, and indicates the reception state of St (0), St (l), St (L-1) from the MSB (most significant bit) side, respectively. .
- the bit corresponding to the received stream becomes 1.
- the demultiplexing schemes in the type 1 and type 2 combiners 3010 each take two, and a block diagram of a demultiplexing unit and a basic stream selector corresponding to the scheme (1) is shown in FIG.
- FIG. 22 shows a block diagram of the demultiplexer and the basic stream selector corresponding to the above method (2).
- each of the B streams is demultiplexed from the E stream, and an optimum B stream is selected and then synthesized. Small B streams that are not actually used for composition are discarded.
- the demultiplexing unit (DEMUX) 3100 divides the input L, book stream St (l) into ⁇ basic streams ⁇ and ⁇ , book extended streams E (m).
- ⁇ indicates the total number of basic streams ⁇ multiplexed in all the separated streams St (l) input to the demultiplexing unit 3100, and corresponds to the above methods (1) and (2). The number is different as shown in the following equation (9).
- the basic stream selector (B-Selector) 3200 selects and outputs one stream with little bit error from the input ⁇ B streams. At this time, -1) the basic stream ⁇ is discarded.
- the combining section (merge) 3300 receives control from the combining controller 3020, combines the input basic stream B and the extended stream E (m) (0 ⁇ m ⁇ M, 1 1), and combines Output stream. Therefore, not all of the extension streams E (m) input to the combining unit 3300 are combined.
- the merge controller 3020 receives error correction information on the network, error correction information, and error information detected in the processing in the demultiplexing unit 3100 and the synthesis unit 3300.
- the information is processed by the basic stream selector 3200, and the information on the extended stream E (m) is controlled by the synthesis unit 3300, and the stream for which error correction is impossible is discarded by the synthesis controller 3020. I do.
- the stream redelivery processing can be performed in the same manner as described for the router 2000.
- the register Rd of the switch controller 2020 of the router 2000 has a value for storing the distribution state
- the register Rm of the combining controller 3020 of the receiver 3000 has a value for storing the reception state. There is a guarantee for lost streams above.
- FIG. 23 shows the relationship between the distribution operation between the router 2000 and the receiver 3000 and the register value Rm.
- the register Rd it is assumed that all streams are stored in the router 2000, and the line between the router 2000 and the receiver 3000 has the available bandwidth of the stream. It is assumed that it is limited to two.
- the receiver 3000 searches for a stream that has not been received by referring to the value of the register Rm. Transmission line The stream is arbitrarily selected in consideration of the bandwidth, and a redelivery request is sent to the router 2000.
- the stream that has not been received is detected as St (1), St (2), St (4), St (5) from each bit of Rm, and the separated stream St ( 1) and St (5) are selected and a request is sent to router 2000.
- Router 2000 retrieves the requested stream from router storage 2040 and redistributes it to receiver 3000.
- the receiver 3 000 updates Rm by setting the corresponding bit of Rm to 1.
- the separating unit (separate) 100 of the separator 1010 of the server 1000 and the combining unit (merge) 3300 of the combining unit 3010 of the receiver 3000 will be briefly described.
- FIG. 24 shows a block diagram of a separating unit (separate) l 100a, which is an embodiment of the separating unit (separate) l 100.
- Separating section 1100a includes coefficient information separating section 1260, variable length decoder (VLD) 1110, run-level coefficient converter 1120, basic enhancement layer separator 1130, basic quantization coefficient converter 1140, extended quantization coefficient Separator 1150, basic rescanner 1160, prediction error rescanner 1170, extended rescanner 1181, 1182, 1183, basic variable length coder (VLC basic) 1210, prediction error variable length coder (VLC prediction Error) 1220, extended variable length coder (VLC-F 0) 1231, (VLC-F 1 ) 1232, (VLC 'F N_1 ) 1233 and coefficient information multiplexing section 1270a. ), And outputs a basic coded signal B and extended coded signals E (0), E (1), E (2),..., E (M-1).
- VLD variable length decoder
- the coefficient information separation unit 1260 of the separation unit 1100a separates the input coded stream (primary coded signal) into coefficients other than coefficient information and coefficient information, and outputs the result.
- the coefficient information is a quantized coefficient code subjected to Huffman coding by two-dimensional run length
- the other than the coefficient information is MB layer data and intra MB DC coefficient code.
- variable length decoder (VLD) 1110 performs variable length decoding on the coefficient information separated by the coefficient information separating unit 1260, and converts it into run level information.
- the run level coefficient change 120 converts the run level information decoded by the VLD 1110 into a one-dimensional quantized coefficient sequence X.
- the base enhancement layer separator 1130 separates the quantized coefficient sequence X converted into the run-level coefficient modification 1120 into a coefficient sequence ⁇ of the base layer and a coefficient sequence ⁇ of the enhancement layer.
- the basic quantization coefficient converter 1140 receives the basic layer coefficient sequence ⁇ separated by the basic enhancement layer separator 1130, performs conversion for code amount reduction, generally performs quantization, and performs basic quantization. And a residual coefficient sequence (prediction error coefficient sequence) D which is difference information between the basic coefficient sequence C and the basic quantized coefficient sequence C.
- the basic quantized coefficient sequence C is a sequence of basic quantized coefficients obtained by performing conversion for code amount reduction on each coefficient value of the basic hierarchical coefficient sequence ⁇ .
- the remainder coefficient sequence D is a remainder coefficient value which is a difference between each coefficient value of the above-described basic hierarchy coefficient sequence ⁇ and each coefficient value restored from the basic quantization coefficient of the basic quantization coefficient sequence C. It is a column of (prediction error coefficient value).
- the extended quantization coefficient separator 1150 receives the extended hierarchical coefficient sequence ⁇ separated by the basic extended hierarchical separator 1130, inputs extended hierarchical separated pattern information from the outside, and adds the extended hierarchical separated pattern information to the extended hierarchical separated pattern information. Therefore, the extended hierarchical coefficient sequence ⁇ is separated into a plurality of extended quantized coefficient sequences F °, F 1 ′′ ′ F N — 1 .
- the basic rescanner 1160 and the basic variable length encoder (VLC basic) 1210 rescan the basic quantized coefficient sequence C generated by the basic quantized coefficient converter 1140, and perform variable length coding. , For generating a basic quantized coefficient coded signal.
- the prediction error rescanner 1170 and the prediction error variable length encoder (VLC prediction error) 1220 rescan the remainder coefficient sequence D generated by the basic quantization coefficient converter 1140, and calculate the remainder coefficient. Is generated, and the run-level coefficient value of the remainder coefficient is subjected to variable-length coding to generate a remainder coefficient encoded signal, which is output as an extended code signal E (0).
- Extended rescanning units 1181, 1182, and 1183 rescan the respective extended quantized coefficient sequences F and FF N_1 generated by extended quantized coefficient converter 1150, and run extended quantized coefficient A level coefficient value is generated.
- the extended variable length encoders ( ⁇ 1 ⁇ ) 1231, (VLC 'F 1 ) 1232, and (VLC' F N_1 ) 1233 are the extended quantizers generated by the extended rescanners 1181, 1182, and 1183, respectively.
- Coefficient la The variable-level coefficient value is variable-length coded to generate extended coded signals E (1), E (2), and E (M-1).
- the coefficient information multiplexing unit 1270a inputs the basic quantized coefficient coded signal generated in the VLC basic 1210 and data other than the coefficient information separated by the coefficient information separating unit 1260, and multiplexes the signals. , To generate the basic coded signal B.
- the coded stream (primary coded signal) is input, and the basic coded signal B, the extended coded signal ⁇ (0), ⁇ (1), ⁇ (2) ⁇ ⁇ ⁇ , E (M— 1
- FIG. 25 shows a block diagram of a synthesizing unit (merge) 3300a, which is one embodiment of the synthesizing unit (merge) 3300.
- Combining section 3300a includes coefficient information separating section 3450a, basic variable length decoder (VLD basic) 3310, prediction error variable length decoder (VLD prediction error) 3320, and extended variable length decoder (VLD, E (0) ) 3331, (VLD'E (1)) 3332, (VLDE (N'-1)) 3333, basic coefficient converter 3340, prediction error coefficient converter 3350, expansion coefficient converter 3361, 3362, 3363, basic A quantization coefficient synthesizer 3370, an extended quantized coefficient synthesizer 3380, a basic extended hierarchical synthesizer 3390, a run-level coefficient converter 3410, a variable length coder (VLC) 3420, and a coefficient information multiplexing unit 3460 are provided.
- the basic coded signal B *, the extended coded signals E * (0), E * (1), E * (2) ..., E * (M'-1) are input, and the combined stream (third-order code Signal).
- Coefficient information separating section 3450a of combining section 3300a separates input basic coded signal B * into elements other than coefficient information and coefficient information, and outputs the result.
- the coefficient information is a quantized coefficient code that is Huffman-coded by two-dimensional run length
- the other than the coefficient information is the MB layer data and the intra MB DC coefficient code.
- VLD basic variable length decoder
- basic coefficient transformer 3340 perform variable length decoding on the coefficient information separated by the coefficient information separation unit 3450a, and convert it to a basic quantized coefficient sequence C *. It is.
- the prediction error variable-length decoder (VLD prediction error) 3320 and the prediction error coefficient converter 3350 perform variable-length decoding on the input extended coded signal E * (0), and calculate residual coefficients (prediction error coefficients). To the run level information, and then to the remainder coefficient sequence (prediction error coefficient sequence). It is.
- the extended variable-length decoders 0 ⁇ 3 ⁇ (0)) 3331, (VLD'E (l)) 3332, and (VLD'E (N'-1)) 3333 are input extended coded signals, respectively.
- E * (0), E * (1), and E * ( ⁇ '-1) are variable-length decoded and converted to run-level information of extended quantized coefficients.
- the extended coefficient variations ⁇ 3361, 3362, and 3363 are the extended quantized coefficients converted to VLD'E (O) 3331, VLD'E (1) 3332, and VLD'E (N, —1) 3333, respectively.
- VLD'E the extended quantized coefficients converted to VLD'E (O) 3331, VLD'E (1) 3332, and VLD'E (N, —1) 3333, respectively.
- F * ° the run-level information of the extended quantized coefficient sequence
- the basic quantized coefficient synthesizer 3370 includes a basic quantized coefficient sequence C * converted to the basic coefficient converter 3340, and a residual coefficient sequence (prediction error coefficient sequence) D converted to the prediction error coefficient converter 3350. And * to generate a base layer coefficient sequence B *.
- the extended quantized coefficient synthesizer 3380 converts the extended quantized coefficients converted to VLD'E (0) 3331, VLD-E (l) 3332, ..., VL D'E (N,-1) 3333 Input the columns F * °, F * 1 '.' F * N ' _ 1 , input the external layer separation pattern information, and input the extended quantization coefficient sequence according to the expansion layer separation pattern information.
- F * °, F * 1 ' ⁇ ⁇ , F * N ' _1 are synthesized into an extended hierarchical coefficient sequence E *.
- the basic enhanced hierarchical synthesizer 3390 includes a basic hierarchical coefficient sequence B * generated by the basic quantized coefficient synthesizer 3370, an extended hierarchical coefficient sequence E * generated by the extended quantized coefficient synthesizer 3380, Are combined to generate a combined quantized coefficient sequence (third-order quantized coefficient sequence) X *.
- the run-level coefficient translator 3410 converts the synthesized quantified coefficient sequence (third-order quantized coefficient sequence) X * generated by the basic extended hierarchical synthesizer 3390 into run-level information. is there.
- variable-length encoder (VLC) 3420 performs variable-length coding on the run-level information converted to the run-level coefficient change 3410, and generates a coding information signal of the coefficient information.
- the coefficient information multiplexing unit 3460 inputs the coded signal of the coefficient information generated by the VLC 3420, and the data other than the coefficient information separated by the coefficient information separating unit 3450a, and multiplexes the combined stream. (Tertiary coded signal).
- this composite stream (tertiary encoded signal) is a normal MPEG-2 stream, it can be decoded and reproduced by, for example, a decoder 3030 that is a general decoder.
- the multiplexing unit 1600 of the demultiplexer 1010 multiplexes the extension stream E (m) to generate separated streams St (l) (0 ⁇ 1 ⁇ L-1) having different rates. explain.
- the multiplexing section 1600 multiplexes the extension stream E (m), so that the number of extension streams E (m) output from the demultiplexing section 1100 can be changed without changing the number M of extension streams.
- a stream can be generated, and by using the difference in the rate of the separated stream St (l), the types of selectable rates are larger than the number of streams.
- a video storage function is added to the fifth embodiment in the above-mentioned Patent Application and Japanese Patent Application No. 2003-381859.
- the separated streams St (0) and St (1) are stored in the router storage 2040.
- each bit of the register is Sw (0), Sw from the LSB (least significant bit) side.
- the bandwidth can be controlled by giving the value of the used bandwidth in binary as a register value.
- the demultiplexing unit 3100 of the synthesizer 3010 is the same as that of the above-mentioned patent and Japanese Patent Application No. 2003-381859.
- a video storage function is added to the fifth embodiment.
- FIG. 27 An encoded signal accumulation / delivery system performing multi-stage transmission will be described with reference to FIGS. 27 and 28.
- the server 1000 inputs an original encoded stream, separates the original encoded stream into a plurality of separated streams St (1), and outputs all separated streams St (1).
- (1) is stored in the server storage 1040.
- the receiver 3000 re-establishes the separated streams St (0;), St (1), St (4), and St (5) that could not be obtained! Send the quest to Norator 2000b.
- the router 2000b searches for the separated stream St (1) stored in the router storage 2040b, and distributes some of the requested streams St (0) and St (4) to the receiver 3000. Also, the router 2000b sends a redelivery request of the missing separated streams St (1) and St (5) to the router 2000a.
- the norator 2000a searches for the separated stream St (1) stored in the norator accumulator 2040a, but does not perform distribution because there is no stored separated stream St (1). Further, the router 2000a sends a redistribution request of the missing separated streams St (1) and St (5) to the server 1000.
- the server 1000 searches for the stored separated streams St (1), and transmits the requested separated streams St (l) and St (5) to the receivers 30 via the routers 2000a and 2000b. I believe in Rooster at 00. Also, at this time, it is not necessary that the rooster self-respect to the Recino 3000 pass through the Norator 2000a and the Norator 2000b.
- the separated streams St (1) and St (5) delivered from 1000 can be combined by the combiner 3010 to obtain a combined stream equivalent to the original encoded stream input to the SANO 1000 .
- the Resino 3000 can obtain the necessary separation stream St (1) from the nearest router 2000 / server 1000 on the network, reducing the communication cost and reducing the communication cost.
- being closest on the network means that the physical route is short, which does not mean that the physical distance is short.
- this synthesized stream can be output to decoder 3020, decoded, and reproduced on display 4000. Therefore, the stream can be received from the closest device (router or server) on the network, and the same video reproduction as the original can be performed.
- the encoding / decoding signal accumulation / delivery system, the encoded signal selection / transmission device, the encoded signal separation / transmission device, and the encoded signal reception / synthesis device according to the present invention are used when a redelivery request is made.
- the transmission encoded signal stored in the encoded signal selective transfer apparatus without going to the encoded signal separating / transmitting apparatus to transmit the encoded signal, thereby reducing traffic on the network.
- the code that has the effect and performs scalable video transmission It is useful as a coded signal storage / delivery system, a coded signal selective transfer device, a coded signal separation / transmission device, a coded signal reception / synthesis device, and the like.
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JP2003153229A (ja) * | 2001-11-15 | 2003-05-23 | Mitsubishi Electric Corp | データ通信装置及びデータ通信方法 |
JP2003219386A (ja) * | 2002-01-17 | 2003-07-31 | Seiko Epson Corp | 画像伝送方法 |
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JP2003153229A (ja) * | 2001-11-15 | 2003-05-23 | Mitsubishi Electric Corp | データ通信装置及びデータ通信方法 |
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