WO2005074220A1 - データ送信装置、データ受信装置およびデータ伝送方法 - Google Patents
データ送信装置、データ受信装置およびデータ伝送方法 Download PDFInfo
- Publication number
- WO2005074220A1 WO2005074220A1 PCT/JP2004/000765 JP2004000765W WO2005074220A1 WO 2005074220 A1 WO2005074220 A1 WO 2005074220A1 JP 2004000765 W JP2004000765 W JP 2004000765W WO 2005074220 A1 WO2005074220 A1 WO 2005074220A1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
- H03M5/02—Conversion to or from representation by pulses
- H03M5/04—Conversion to or from representation by pulses the pulses having two levels
- H03M5/06—Code representation, e.g. transition, for a given bit cell depending only on the information in that bit cell
- H03M5/12—Biphase level code, e.g. split phase code, Manchester code; Biphase space or mark code, e.g. double frequency code
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
Definitions
- the present invention relates to an end-to-end transmitter, an end-to-end receiver, and an end-to-end transmission method, and more specifically, to transmitting a noise-modulated transmission y-end.
- a state transition occurs in the center of one bit period (for example, 0 ⁇ 1 or 1 ⁇ 0)
- the logical value is always inverted (that is, after the phase-phase modulation, the direct A
- the transmitter signal is not transmitted separately.
- O Figure 19 shows the frame configuration of s / ⁇ D IF 0 S / P
- the frame of D IF is formed by a shutter and a header, and the beam modulator is applied to the shutter.
- MOS metal-oxide-semiconductor
- T (Med 1 a ⁇ r ien t ed S y S t e ms T ran s P ort) 0 M
- a single block is sent in units of a frame (MOST frame).
- FIG. 20 shows a typical configuration of a conventional MoS ⁇ transmitting / receiving apparatus.
- the transmitting / receiving apparatus 90 includes a MoST controller 91
- An E / O converter 92, an o / / converter 93 are provided.
- the transmission end data is input to M0ST input port 91.
- the MOST controller 91 performs a predetermined process, and performs E / O conversion of the M0ST frame that has been changed to a phased mark.
- the ⁇ E / O converter 92 which outputs as 9 2, converts the OSTST frame (electric signal) from the MOST controller 91 into an optical signal, and converts the optical fan 94 into an optical signal.
- the optical signal is output to another transmission / reception device through the o-way, and the transmission / reception device 90 includes an optical fiber 9
- Optical signals from other transmitting and receiving devices are input through 5 0 Input optical signals are converted into electrical signals by ⁇ 0 / E conversion 93 Converted as MOST n controller as a frame
- ⁇ ⁇ S is a ring-type LAN and is a communication tool optimized for data transfer using SPOF (plastic optical phono). Vist as a transmission medium.
- SPOF plastic optical phono
- the transmission of the VQ signal is not required, but the transmission bandwidth required to achieve a predetermined data transfer rate is obtained. For example, as shown in FIG. 20, in order to achieve an effective transfer rate of 25 MbPs, as shown in FIG.
- the transmitter is output from an in-vehicle device or the like, and the modulated transmitter and receiver are left in the vehicle. If a V-distorted cable is used as a transmission medium that is unlikely to affect the outside, the effect of electromagnetic radiation emitted outside will be ,, cannot be seen
- Fig. 21 shows an example of the configuration of a transmission / reception device for transmitting a MoST frame by using the J-channel and the output cable.
- the o-value and the ping unit 98 are converted to parallel ⁇ s / P conversion units 97 by the ⁇ s / P conversion unit 97.
- the two bits sequentially output from the S / P converter 977 are mapped to a predetermined signal level as one symbol (more precisely, to the direct symbol). Although each symbol is mapped to the amount of signal level fluctuation, detailed mRTti light is omitted here.o)
- o Figure 22 shows the 8-valued M-V ping part of-. An example of the processing result of 9 8-is shown.
- the processing result of the 8-valued M-V-Ping unit 98 is output to the D / A conversion unit 99 and converted to an analog signal.
- the transmitting and receiving device 96 has an octal mapping unit 9 After 8 Ruofu off I filter or the like Ryo emissions - * 0, ⁇ data Le off I filter is provided, is ⁇ Na Gouf I filter are found provided have so etc. subsequent D / A converter 9 9
- the differential receiver 104 has a V-disc cable 1
- the signal received from the receiver is input through the differential receiver 104.
- each symbol is converted into a 2-bit parallel unit based on the signal level.
- the data is ⁇ / s Further, the signal is converted to a converter T by the conversion unit 101 and input to the MOs ⁇ controller 91.
- each of the two transmission and output terminals output from the MoSTn controller 91 is mapped to a predetermined signal level as one symbol and transmitted.
- the transmission signal always contains a frequency component that is half the symbol frequency by mapping the signal level so that the polarity of the signal level is always inverted for each symbol.
- the PLL on the receiving side.
- mapping each symbol When transmitting two bins of information with one symbol, map each symbol to eight signal levels or offsets (such mappings as shown below). (Referred to as 8-valued mapping), the interval between thresholds for judging the signal level to the receiving side is narrow, and there is a problem that transmission errors are likely to occur.
- the present invention can further reduce electromagnetic radiation in transmitting and receiving phasor-tuned transmission data. And a transmission device that can reduce transmission errors.
- the purpose of this is to provide a transmission method.
- the present invention employs the following configurations.o Reference numerals and the like in parentheses are shown. ⁇ In order to assist understanding of the present invention, a correspondence relationship with an embodiment described later is shown. Therefore, it should not limit the scope of the present invention in any way.
- a transmitter (10) generates and outputs a transmission signal on the basis of a transmission end changed in a bi-directional manner, and outputs a transmission T.
- a transmission section that generates and outputs a transmission signal based on a phase-locking section and a section (12) for performing a phase-mapped demodulation and an output filter of the phase-out section. 14)
- the feature is that the electromagnetic radiation is reduced when transmitting and receiving the noise-modulated transmission data. Reduced transmission errors can be further reduced 0
- the in-vehicle device has an anti-phase-mark modulation function, and is further provided with the above-mentioned client transmitting device.
- No-fuzzy-mark When transmitting and receiving modulated transmission data, there is no change in the on-vehicle-device-modulating function that the on-board equipment has. ⁇ It is possible to further reduce electromagnetic radiation and to further reduce transmission errors.
- the data receiver (22) of the present invention generates and outputs reception data based on the reception signal. Therefore, the reception unit (26) for receiving the reception signal and the reception unit (26) *- ⁇ ,
- the on-vehicle device of the present invention is characterized in that it has a bi-directional mask recovery function and is equipped with the above-mentioned remote receiver.
- the in-vehicle unit has a function to perform the demodulation function. Without any changes, the electromagnetic radiation can be further reduced, and transmission errors can be further reduced.
- the data transmission method of the present invention is a method of transmitting a packet-modulated transmission data and a data transmission.
- the data is transmitted after demodulation of the data from the transmitter to the receiver, and the receiving side changes the receiver to the receiver by changing the receiver's buffer to transmit the data.
- the transmission device When transmitting and receiving the transmission data that has been modulated by the noise engineering, the transmission device must be able to transfer the data.
- FIG. 1 is a block diagram showing a configuration of a data transmission device according to an embodiment of the present invention.
- FIG. 2 is a diagram showing the relationship between the input and output of the phasing end code section 12 o
- FIG. 3 is a block diagram showing the configuration of the transmitting unit 14.
- FIG. 4 is a diagram for explaining the operation of the quaternary mapping unit 16.
- FIG. 5 is a diagram for explaining the operation of the quaternary mapping unit 16.
- FIG. 6 is a diagram showing a mapping table referred to in the four-valued M V ping section 16.
- FIG. 7 is a block diagram illustrating a configuration of a data receiving apparatus according to an embodiment of the present invention.
- FIG. 8 is a block diagram showing the configuration of the receiving section 26.
- FIG. 9 is a diagram for explaining the operation of the difference calculation unit 30.
- FIG. 10 is a diagram for explaining the operation of the quaternary determination unit 28.
- Fig. 11 shows the relationship between the input and output of the perforated engineering code section 24.
- FIG. 12 is a diagram showing a frame structure in SP DIF.
- Fig. 13 is a diagram showing an example of the header part mapping table.
- FIG. 14 shows the signal level of each symbol when each header is mapped.
- FIG. 15 is another diagram showing the signal level of each symbol when each is mapped.
- FIG. 16 is a diagram showing a waveform of a transmission signal including a header section mapped based on the mapping table in FIG. 13.
- Figure 17 shows an example of a conversion template for the header section.
- FIG. 18 is a diagram for explaining the hyper-diffusion modulation.
- Figure 19 is a diagram showing the generation of the s / PDIF frame.
- FIG. 20 is a diagram showing a configuration of a conventional transmission device for transmitting and receiving a MONST frame via an optical fiber.
- FIG. 21 is a diagram showing a configuration of a conventional transmitting / receiving apparatus for transmitting / receiving a MOS frame through a conductor.
- FIG. 22 is a diagram for explaining the octal mapping. 0 Best Mode for Carrying Out the Invention
- a filter transmitting apparatus according to an embodiment of the present invention will be described.
- the receiver will be explained with reference to the drawings.
- FIG. 1 shows the configuration of the transmitting device.
- the transmitting device 10 is not shown, and is subjected to bi-phase mark modulation output from the transmitting device.
- the transmission transmitter 10 receives the transmission data, and the transmission device 10 includes a phasing unit 12 for performing a pulse demodulation and demodulation of the input transmission data, and And a transmitting unit 14 that converts the output data of the unit 12 into a signal suitable for outputting to the transmission line.o Generated by the transmitting unit 14
- the electrical signal is transmitted as a transmission signal through a conductor such as a V-strand cable.
- the transmitting section 14 outputs an electric signal.
- the transmitting section may output an optical signal.
- the modulated transmission data may be an optical signal.
- Fig. 2 shows the relationship between the input and output of the end unit 12 of the source unit.
- the sending unit is the unit that transfers the device on the receiving side.
- Figure 3 shows the structure of the transmitter 14; however, Figure 3 is only an example of the structure of the transmitter-in this case, the output of Each bit of the above is regarded as one symbol,
- V-dist cable that is, a V-is cable.
- a pair of lines transmits signals with inverted polarities, respectively.
- the transmitting unit 14 is in a state where the transmission is completed.
- the 4-level mapping is performed on the output data of 1 and 2 (the details of the processing will be described later) from the 4-level mapping section 16 and the 4-level mapping section 16 A D / A converter 18 that also converts the output digital signal to an analog signal, and a pair of a distortable cable based on the signal after DA conversion. It has a differential K-radiator 20 for transmitting signals symmetrical to each other on the line.
- the four-level mapping section 16 is provided at the subsequent stage.
- a ⁇ digital filter such as a Lof filter is provided.
- a ⁇ ⁇ filter is provided on a weekly basis, for example, at the subsequent stage of the D / A converter 18.
- the quaternary mapping section 16 is shown in FIG. 4 in which the symbols of the output phase of the noise-fed and section 12 (in this case, one-bit V data) are shown in FIG. Four signal levels (+1 5 ⁇ + 0
- each symbol of the transmitter is mapped to the upper level and the lower level alternately.
- the ping is performed by a four-level mapping section 16 and held according to a certain mapping template.
- the four-level mapping section 16 is shown in FIG. Try to map a symbol-map the sign of the symbol you want to map to
- Fig. 6 shows a specific example of the mapping table held and retained by the four-valued mapping section 16. o
- the number indicates the difference from the signal level of the first U, and the receiving device, which will be described later, reproduces the last bit of the mapping process based on this difference.
- the difference between the signal level and the symbol is 3-1 + 1
- the transmission end value can be set to 0. If it is any one of +3, it is determined that the transmission end value can be set to 0.If the difference between the signal level and the direct symbol is -2 +2, Can be determined to be 0.If the difference between the signal levels of the consecutive symbols is transmitted together with the signal, it will be used as a reference when reproducing the signal. Eliminates the need for signal levels (e.g., ground, level for 7L)-o This is particularly useful if the reference signal level differs between the transmitter and receiver. However, the present invention is not limited to this. For example, if the symbol level is related to the signal level of the immediate symbol ⁇ 0, or +0 5 or 0 • 5
- V-Ping to symbol 1, + 1 • 5 or 1 •
- FIG. 7 shows the configuration of the terminal receiving device.
- the receiving device 22 includes a power-span, a part 24 and a receiving part 26.
- the signal transmitted from the collector transmitting device 10 shown in FIG. 1 is input to the receiving unit 26 via a soot cable, and
- the differential receiver 34 which is an example of the configuration, is a
- the difference between the signals transmitted by the two wires is output, and the-output is converted to a digital signal by the A / D converter 32.
- the A / D converter 32 The output ⁇ is input to the difference calculator 30.
- the force difference calculator 30 sequentially calculates and outputs the signal level difference between the direct symbol and the symbol for each symbol.
- the quaternary determination unit 28 sequentially converts the difference calculation result into a code of 0 or 1 with reference to the conversion table shown in FIG. 10 and outputs the result. That is, the difference calculation result is ⁇ 3. ,-1 ⁇ +1, +3, -H.
- 1 is output to octave which is 2 or +2, so that the quaternary judgment unit 28 outputs the data sequentially.
- the output end of the four-value determination unit 28 is determined by the buffer process in FIG. 7 and the signal input to the unit 24.
- the unit 24 changes the input ⁇ -data into a noise pattern, and outputs the data to the receiving-side device (not shown).
- the output of the first part 24 corresponds to the input of the phase ⁇ - ⁇ , one-way, part 12 shown in FIG.
- the receiving device has a noise mask function, and generates a live signal based on the output T of the noise circuit unit 24. If you try again
- the transmission controller that has been subjected to no-phase mask modulation is bi-directionally demodulated and then transmitted.
- the transmission bit rate required to achieve the required effective transfer rate is reduced by half, for example, as in Example X.
- the electromagnetic radiation can be further reduced and the transmission can be further reduced. This is a very serious problem, so it is very effective when transferring data between vehicles using a wire such as a cable for cable transfer.
- the data transmitting device and the data receiving device are each provided with only the data transmitting function and the data receiving device. Use both the transmission function and the reception function
- It can be configured as a V-tape transmission / reception device equipped with a B
- the four-valued mapping is performed in the transmitting unit 14.
- the present invention is not limited to this.
- mapping such as 8-valued mapping shown in Fig. 2.>
- the receiving side A macro signal that can be easily reproduced from a clock signal
- the present invention is not limited to this.
- the transmitting device may be built in the transmitting device, or the receiving device may be used.
- O The device on the side is the same as the data receiving device.
- the master transfer is performed in frame units, and the phasor mark is applied to the y part.
- the header part of the S / PDIF frame does not apply the bi-directional mask modulation.
- the header section is a neutral phase, and the demodulation is not performed by the section 12.
- Data was transmitted individually from the transmitter to the receiver, and the knotter was added to the receiver output device.
- the V-section of the V-section is processed according to the mapping table. It is unlikely that a broken pair will be required.o
- the mapping table of the Example of 1 1 data transmission operation
- Figure 12 shows the frame structure of the S / PDIF.
- the S / PDIF has three types of headers.
- (B head M head K head W head K head) is specified, and two head head structures are specified for each of the head end values of head head. o Specifically, if the immediate data value of the header is 0, the header structure of (a), (b), and (c)
- the perf process code shown in Fig. 1 is sent to the part 12 and the transmission data input from the transmitting machine is sent to the transmission device, as shown in Fig. 12 (a).
- mapping section 16 uses a separate mapping table for the V-header section, which is different from the V-header section. Is an example of a mapping table for the header part. In the case of a V-Ping-tele of 0, the header part is mapped to a total of four symbols, and signal level 0 is repeated for the first two symbols. ⁇ Two symbols stipulate mapping that distinguishes three types of headers. O For example, for header B, ⁇ 0 0 + 1 • 5 0 • 5 J or ⁇ 0 0
- the order of the magnitude relation is maintained.0 Specifically, the signal level of the symbol directly mapped to the head part is equal to the reference level. In the case of rising upward, the signal level of the symbol immediately after the header is mapped below the reference level and is mapped directly below the header.
- the signal level of the V-pinned symbol falls below the reference level, the signal level of the symbol immediately after the head section is mapped above the reference level. It is preferable that the signal level of the symbol immediately after the last symbol (4th symbol) of the header part is changed with respect to the reference level. If it is to be mapped down, it is above the reference level, and if the signal level of the symbol immediately after it is mapped above to the reference level.
- the conversion table for the normal unit is used. It is possible to convert using Fig. 10).
- Two mapping patterns are provided for mapping the bol (4th symbol) to ⁇ and level up and down o
- Figure 14 shows the signal level of the symbol directly in the header section and the vertical level when mapped to the reference level.
- Figure 15 shows each header when the signal level of the symbol directly beneath the header is mapped above the reference level.
- the waveform of the transmission signal that includes the header section that has been pinned based on the mapping table shown in Fig. 13 has the waveform shown in Fig. 16.
- Figure 16 shows that the signal level of the symbol immediately after is mapped above the reference level.
- the waveform is as shown in (b), and if it is mapped below, the waveform is as shown in Figure 16 (a).
- the receiver receives the received signal having the waveform of FIG. 16 and the difference calculator 30 of FIG. 8 receives the header. Then, the soda part is divided into It according to the difference value or h, and the perforated part 24 in FIG. 7 is located at a position corresponding to the ferrule part in FIG. Insert the header converted based on the love table, generate a reception header, and send it to the receiving machine.
- ⁇ S / PDIF, BB, ⁇ H, W, ⁇ , and ⁇ D are determined by the immediately preceding value of FIG.
- the permutation process n-mode changes the vector sequence to be converted depending on whether the judgment value of the data immediately before the head is 0 or 1. For example, in the case of header X, if the direct y-address value is 0, it is calculated as ⁇ 1 1 1 0 1 0 0 0 ', and the -H. Is ⁇ 0 0 0 1 0 1
- the header to which the bi-directional mask is not applied can also be obtained. Transmission is possible, and the present invention can be used.
- the present invention is suitable, for example, for a system in which noise modulation is performed by a plurality of devices on a LAN in a car or the like, and in which no data is removed. Is
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005517351A JPWO2005074220A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置およびデータ伝送方法 |
US10/530,321 US20060165194A1 (en) | 2004-01-28 | 2004-01-28 | Data sending device, data receiving device, and data transmission method |
PCT/JP2004/000765 WO2005074220A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置およびデータ伝送方法 |
Applications Claiming Priority (1)
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PCT/JP2004/000765 WO2005074220A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置およびデータ伝送方法 |
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WO2005074220A1 true WO2005074220A1 (ja) | 2005-08-11 |
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PCT/JP2004/000765 WO2005074220A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置およびデータ伝送方法 |
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US (1) | US20060165194A1 (ja) |
JP (1) | JPWO2005074220A1 (ja) |
WO (1) | WO2005074220A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63104525A (ja) * | 1986-10-21 | 1988-05-10 | Sumitomo Electric Ind Ltd | デイジタル変復調回路 |
JPH0423614A (ja) * | 1990-05-18 | 1992-01-28 | Mitsubishi Electric Corp | 復号装置 |
JP2001251285A (ja) * | 2000-03-06 | 2001-09-14 | Yamaha Corp | 伝送レート判別方法及び回路 |
WO2002030075A1 (fr) * | 2000-10-05 | 2002-04-11 | Matsushita Electric Industrial Co., Ltd. | Emetteur de donnees numeriques, procede de codage d'une ligne de transmission et procede de decodage |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6344799B1 (en) * | 1999-02-08 | 2002-02-05 | Calvin Walker | Location specific alarm relay (L.S.A.R) |
US6307475B1 (en) * | 1999-02-26 | 2001-10-23 | Eric D. Kelley | Location method and system for detecting movement within a building |
US6888886B2 (en) * | 2000-03-06 | 2005-05-03 | Yamaha Corporation | Interface apparatus and method for receiving serially-transmitted data |
US20010033622A1 (en) * | 2000-03-14 | 2001-10-25 | Joengren George | Robust utilization of feedback information in space-time coding |
US7194047B2 (en) * | 2002-09-20 | 2007-03-20 | Ati Technologies Inc. | Receiver for robust data extension for 8VSB signaling |
US7983327B2 (en) * | 2006-08-28 | 2011-07-19 | Samsung Electronics Co., Ltd. | Method and system for providing digital adaptive predistortion in a subscriber station |
-
2004
- 2004-01-28 US US10/530,321 patent/US20060165194A1/en not_active Abandoned
- 2004-01-28 WO PCT/JP2004/000765 patent/WO2005074220A1/ja active Application Filing
- 2004-01-28 JP JP2005517351A patent/JPWO2005074220A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63104525A (ja) * | 1986-10-21 | 1988-05-10 | Sumitomo Electric Ind Ltd | デイジタル変復調回路 |
JPH0423614A (ja) * | 1990-05-18 | 1992-01-28 | Mitsubishi Electric Corp | 復号装置 |
JP2001251285A (ja) * | 2000-03-06 | 2001-09-14 | Yamaha Corp | 伝送レート判別方法及び回路 |
WO2002030075A1 (fr) * | 2000-10-05 | 2002-04-11 | Matsushita Electric Industrial Co., Ltd. | Emetteur de donnees numeriques, procede de codage d'une ligne de transmission et procede de decodage |
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JPWO2005074220A1 (ja) | 2007-11-15 |
US20060165194A1 (en) | 2006-07-27 |
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