WO2005074219A1 - データ送信装置、データ受信装置、伝送路符号化方法および復号方法 - Google Patents
データ送信装置、データ受信装置、伝送路符号化方法および復号方法 Download PDFInfo
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- WO2005074219A1 WO2005074219A1 PCT/JP2004/000746 JP2004000746W WO2005074219A1 WO 2005074219 A1 WO2005074219 A1 WO 2005074219A1 JP 2004000746 W JP2004000746 W JP 2004000746W WO 2005074219 A1 WO2005074219 A1 WO 2005074219A1
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- 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
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- 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
- H03M5/20—Conversion to or from representation by pulses the pulses having more than three levels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
Definitions
- the present invention relates to a data transmitting apparatus, a data receiving apparatus, a transmission path coding method, and a decoding method. More specifically, the present invention relates to a transmission ⁇ symbol for a plurality of signal levels. , A transmitter for transmitting or receiving a signal generated by mapping to a receiver, a receiver for transmitting a signal, a transmission path coding method, and the like. And decryption method o
- Each is represented by a pamphlet value.
- the receiving device will not be able to easily reproduce the quick signal from the transfer data.
- the data that has been modulated as described above is in addition to the data that has been modulated. 8 V to get the date
- Biphasic modulation is not used for the week, and the sequence of bits in the pamble contains three or more consecutive 0s or 1s.
- example X For example, the (B pumble) that indicates the beginning of the DV The one that indicates the beginning of the subchannel of the R channel (M amble) or the one that indicates the beginning of the subchannel of the L channel (W amble) )
- S / PDIF the frame (S
- the T-block uses the above-mentioned bi-directional modulation.Also, at the beginning of the block, As described above, a puzzle
- Figure 20 shows the pattern of each header (V to V, M to V, and W header) used in S / PDIF.
- the sign is always inverted in the field of the header section and the header section. Therefore, the pattern of each header corresponds to the sign of the direct J. Two patterns are prepared
- FIG. 21 shows a typical configuration of a conventional S / PDIF transmission / reception apparatus.
- the transmission / reception apparatus 90 includes an S / PDIF controller 91 E / 0 converter 92, an o / E converter 9 3 is separated from the BX.
- the S / PDIF connector ⁇ -911 receives a transmission 7 "header, and the S / PDIF controller D-91 receives the transmission termination.
- the phase change is added to row 0, and headers (V to V, M to V, etc.) are added weekly.
- the E / O converter 92 which outputs a simple S / PDIF frame as an E / O converter 92, is composed of the S / PDIF frame from the S / PDIF connector 91. (Electrical signal) is converted into an optical signal, and the optical signal is output to another transmitting / receiving device through the optical fiber 94. On the other hand, the transmitting / receiving device 90 is provided with an optical signal.
- An optical signal from another transmitting / receiving device is input through 95.
- the input optical signal is converted into an electric signal by the O / E converter 93, and is shown in FIG.
- S / PDIF is PF (plastic optical fiber).
- the transmission of the clock signal is not required, but the transmission of the clock signal is not required.
- the transmission bandwidth required to achieve this has increased.
- PDIF requires a 50 Mb P s data transfer rate. Therefore, if the no-fuzzy-mark-modulated transmission data output from an on-vehicle device or the like is sent as it is to the in-vehicle network, the transmission medium
- the use of distorted cables, which are unlikely to affect the outside use the electromagnetic radiation emitted to the outside.
- each of the two sources of the transmitter data output from the S / PDIF controller 91 was used.
- the signal is mapped to a predetermined signal level and transmitted as a symbol (for example, country publication number 0 2/3 0 0
- Fig. 22 shows the S / PDIF frame with V O
- the example of the configuration of the receiving device when transmitting by S is not shown.
- the PDIF frame (serial writer) is an s / P converter.
- an 8-level mapping section 98 that is converted into a parallel ⁇ unit every 2 bits is sequentially output from the S / ⁇ conversion section 97.
- a signal level is defined as one symbol of a vector.
- the transmission / reception device 96 includes, for example, a ⁇ digital filter such as a mouthpiece filter at the subsequent stage of the 8-valued M-V-Ping section 98.
- a filter is provided, and the D / A converter
- the differential receiver 104 has a disassembly cable 1
- the received signal is input to an A / D conversion section 103 through a differential receiver 104 and is converted to an end-to-end digital signal 0 A / D conversion section 10
- the output 7 "from 3 is supplied to an octal decision unit 102, and each symbol is converted into a 2-bit V parallel output based on the signal level.
- O The binary data output from the octal value section 102 for every two bits is the P / s conversion section 10 It is converted to a filter and converted to an S / PDIF
- the output of the P / S converter 101 of o input to the controller 91 corresponds to the S / PDIF frame shown in FIG. 19.
- the / PDIF unit D-outputs a receiver based on the input S / PDIF frame.
- each 2 bits of the transmitter output from the S / PDIF controller 91 is regarded as one symbol, and is mapped to a predetermined signal level.
- the symbol level is higher than when transmitting one bit as one symbol.
- the polarity of the signal level is always inverted for each symbol as shown in Fig. 23. Since the transmission signal always contains half the frequency component of the symbol frequency due to the mapping to the receiver, the signal is transmitted to the receiving device. Les, then, PL
- each symbol When two symbols of information are transmitted by one symbol, each symbol must be mapped to eight signal levels or shifted (hereafter, this type of mapping).
- the threshold interval for judging the signal level at the receiving end is narrower than the transmission level.
- the signal is considered to be transmitted as a quaternary mapping (0), and the signal level cannot be increased due to the signal level. It is possible to increase the interval between the thresholds for judging the threshold value in comparison with the 8-valued mapping, so that fewer transmissions can be performed. ⁇
- the data is not generated by changing the data, it can be transmitted as a 4-bit data. If you try to transmit quaternary mapping to the header part of an 8-bit scratch for a week, it takes eight symbol periods to transfer the header part. As a result, the frame cycle of the S / PDIF frame changes, and the smooth transfer of the S / PDIF frame is hindered. O There is a problem
- the present invention provides, for example, the S / PDIF file described above. It should be transmitted separately from the header section of the rem section.
- the present invention employs the following constitutions to solve any of the above problems.
- Reference numerals in parentheses are used in the following embodiments to facilitate understanding of the present invention. It shows the corresponding relationship with, and should not limit the scope of the present invention at all.
- the transmission path coding method of the present invention is a method of transmitting each symbol of a 7 "transmission to a plurality of signal levels (+1.5, +0.5, 0.5,-).
- the reference level (0) The magnitude (polarity) of the signal level of each symbol with respect to the symbol 0 is mapped so that it always reverses for each symbol 0, that is, the N ( N is an integer.)
- the signal level of the symbol is greater than the reference level, and the symbol ⁇ is the symbol next to the symbol in the field ⁇ .
- the signal level of the symbol is mapped so as to be smaller than the reference level, while the signal level of the Nth S symbol in the filter section is smaller than the reference level.
- the signal level of the (N + 1) th symbol is larger than the reference level.
- the data is to be transmitted separately from the data, such as the header, the data must be transmitted between the T and the data.
- the discrimination symbol for discrimination is included, and the signal level of the discrimination symbol with respect to the reference level is included.
- the relationship between the symbol of the discrimination symbol and the symbol of the discrimination symbol is the same as that of the symbol of the discrimination symbol.
- the signal level is greater than the reference level, and in the field P, the signal level of the discrimination symbol is mapped to the V level such that the signal level of the discrimination symbol is smaller than the reference level.
- the signal level immediately after the discrimination symbol is equal to the signal level of
- the receiving machine it is possible for the receiving machine to recognize the reference level and to reliably detect the discrimination symbol.
- the reference level it is not possible to detect the reference level. If the reference level is obtained, it is particularly effective for rings. 0
- the discrimination symbol is a symbol included in the symbol sequence that constitutes the non-interrupt part, a misaligned symbol that can be used, and 0 at the beginning of the non-interrupt part. If the discrimination symbol is set to BX, it is possible for the receiving device to discriminate the head of the non- ⁇ unit earlier than before, so that it is more preferable. , O
- the transmitter (10) of the present invention transmits each symbol of the transmitter to a plurality of signal levels (+1.5, +0.5).
- the transmission data is sent to a certain two levels (
- the discrimination symbol for the discrimination symbol is included, and the signal level of the discrimination symbol with respect to the reference level is determined by the discrimination symbol.
- the data receiving apparatus (26) of the present invention is capable of transmitting each symbol of a transmission end signal to a plurality of signal levels (+1.5, +0.5,
- a discriminating symbol detector for detecting a discriminating symbol for discriminating the end of the transmission signal from the non-tater section (header section). 30), and a data determination unit (34) that reproduces the data from a portion of the transmission signal based on the detection result of the discrimination symbol detection unit and a discrimination symbol
- a non-data determination section (32) for reproducing non-T-data information (header information) from a non-data section of the transmission signal based on a detection result of the detection section;
- FIG. 1 is a block diagram showing the configuration of a ⁇ -data transmitting apparatus according to the first embodiment of the present invention.
- Figure 2 shows the header V-Ping section 16 and the data mapping section.
- FIG. 18 is a diagram showing an output of 18
- FIG. 3 is a diagram for explaining the operation of the seven-taping section 18.
- Fig. 4 shows the mapping table referenced by the T-mapping section 18 o
- FIG. 5 is a diagram for explaining the operation of the header massing unit 16.
- FIG. 6 is a diagram for explaining the operation of the header masking section 16.
- FIG. 7 is a diagram showing a configuration of the data receiving apparatus according to the first embodiment of the present invention.
- FIG. 8 is a diagram showing the relationship between the received signal and the output of the difference calculation unit 36.
- FIG. 9 is a diagram for explaining the operation of the data determination unit 34.
- FIG. 10 is a diagram for explaining the operation of the header judging unit 32.
- FIG. 11 is a diagram showing a part of the configuration of the data transmission device according to the second embodiment of the present invention.
- FIG. 12 is a diagram for explaining the operation of the data transmission device according to the second embodiment.
- FIG. 13 is a diagram showing a part of the configuration of the data receiving device according to the second embodiment of the present invention.
- FIG. 14 is a diagram showing an example of a system configuration according to a modification of the present invention.
- Fig. 15 is a diagram showing the structure of the transmission data in the modification example.
- FIG. 16 is a diagram showing a pattern of a signal waveform of an utterance part in a modification.
- FIG. 17 is a diagram showing a pattern of a signal waveform of a non-data portion in the modified example.
- Fig. 18 is a diagram to show the change of the noise pattern o
- FIG. 19 is a diagram for explaining the configuration of the S / PDIF frame.
- FIG. 20 is a diagram for explaining the head section of the S / PDIF frame.
- FIG. 21 is a diagram showing a configuration of a conventional transmitting / receiving apparatus that transmits / receives an S / PDIF frame through an optical fan.
- Fig. 22 is a diagram showing the configuration of a conventional transmitting / receiving device that transmits / receives an S / PDIF frame through a conductor.
- FIG. 23 is a diagram showing a mapping example when two bits of data are mapped to a predetermined signal level as one symbol.
- FIG. 24 is a diagram showing an example of mapping when one bit of data is mapped to a predetermined signal level as one symbol.
- FIG. 1 shows a configuration of a T-transmitter. o
- the transmitter 10 performs quaternary mapping on the transmission end, and the quaternary mapping unit 12 and quaternary mapping.
- a D / A conversion unit 20 for converting the digital signal output from the mapping unit 12 into an analog P / A signal;
- a differential K line is used to transmit a symmetrical signal to each of the two bus cables 24.
- 2 is provided at the end of the 4-valued mapping section 128, although not shown in the figure.
- a filter is provided, and in the subsequent stage of the D / A conversion section 20, a fan ⁇ filter is provided on a weekly basis.
- the four-valued V pinning section 12 includes a signal level storage section 14 and a quadruple pinning section 16 and a T-cell V pinning section 18 to 0.
- the damping section 16 is a T-transmitter 1
- Reference numeral 18 denotes each of the transmission data generated by the data transmission device 10 (or input from the device connected to the ⁇ -data transmission device 10).
- the symbol here, a 1-bit filter
- the header mapping section 16 and the processing of the ⁇ mapping section 18 result in the generation of a symbol sequence as shown in FIG. O
- the signal level storage section 14 output to the A conversion section 20 sequentially stores the signal levels of the symbols directly output from the quaternary mapping section 12, and The values are supplied to the pinning section 16 and the ⁇ -mapping section 18 o
- the processing of the 4-value mapping section 12 is performed in one section. First, let's look at Figure 3 and Figure 4 and then refer to Figure 3 and Figure 4.
- the transmission V-Ping section 18 converts each symbol of the transmission end (here, the end of one bit) into four signal levels (+ 1 • 5, + 0 • 5,-0 5,-1 • 5)
- each symbol of the transmission 7 "block is mapped to the upper level and the lower level alternately.
- One-tagging section 18 is a symbol of the symbol that is used as the masking head 5 and a value supplied from signal level storage section 14. (The signal level of the symbol immediately after the symbol to be pinned).
- Example X Refer to the V-Ping table to determine the signal level o Example X. For example, if the symbol of the symbol to be mapped is 1 and
- the number in parentheses indicates a difference from the direct signal level, which will be described later.
- the receiver receives the M-Ping process based on the difference of>-.
- the transmission ⁇ is 1 is 0.
- the difference between the signal level between successive symbols is T
- the reference signal level eg, Gran K level
- ⁇ 0 related to the signal level of the immediate symbol, +0 to the symbol 0, or +0 •
- the header section is composed of 4 symbols as shown in Fig. 2. o
- the V-damping section 16 has an output in advance for each V-axis type. Outputs a V-pattern according to the type of the V-pattern, as shown in Figs. 5 and 6.
- O Figure 5 shows the pattern of the header considered in Figure 16 and Figure 6 shows the header for B, the header for M, and the V for W.
- the head to be selected depends on the head V pinning part 1
- the header pin 16 is a value provided by the signal level storage section 14 (that is, the symbol ft after the ⁇ unit) for each header type.
- the output of four turns in response to the signal level) is output.
- the header type is B and the header type is B.
- the signal level is stored in the signal level storage unit 14. 4-H. Memory was-0 • 5
- the signal levels from the head masking part 16 are -0 • 5,-1-5, 1-5, and-1-5, respectively.
- the signal level storage unit If the header type is W and the header is W, the signal level storage unit
- the supplied value is-15, and the value of ⁇ is changed from Fig. 6.
- the signal level from the header mapping section 16 is-1 • 5, and -1 • 5, + 1 • 5,-0 • 5
- the common symbol for all headers is that the symbol at the head of the header is the signal of the symbol directly at the end (the last symbol at the end of the header).
- the signal level is to be mapped to the same signal level as the signal level. Invert Since the signal is clipped, the receiving device described later sets the symbol level to the signal level of the symbol and the signal level to the same signal level.
- the symbol at the beginning of the header section is a special symbol for distinguishing the header section from the 7 "section, such as 0, which makes it possible to reliably identify the section.
- -The symbol in the following is referred to as the discrimination symbol.
- the discrimination symbol does not necessarily have to be the first symbol in the head part. In order to distinguish the receiver from the receiver earlier, it is preferable to use the symbol at the head of the header as the determination symbol.
- the signal level of the discrimination symbol is assumed to be the signal level of the immediate symbol and
- the present invention is not limited to this, and the signal level of The signal level of the discrimination symbol may be set to any value as long as the discriminating section and the hender section can be discriminated. 0
- the discrimination symbol The polarity of the signal level (that is, the magnitude relationship with respect to the reference level) depends on the discrimination symbol
- the signal level of the discriminating symbol is set so that it has the same polarity as that of the direct symbol, the signal is set to a 7 "receiver and the change in polarity is monitored. Therefore, detecting a discriminating symbol by detecting a change in polarity is not a problem.However, in order to monitor a change in polarity, it is necessary to determine a reference level. Therefore, in situations where it is difficult to determine the reference level, it is desirable that the reference level be determined and a level-determining symbol be detected.
- the signal level of the discriminating symbol is set to be equal to or smaller than the signal level of the immediate symbol, the signal level of the signal receiving device is simply increased. Ha 0 data of the increase or decrease
- the signal level of the discrimination symbol can be changed as shown in Fig. 6 as shown in Fig. 6. Because the signal level is equal to the signal level, the receiver can detect the discrimination symbol by simply monitoring whether the signal level has changed or not. Therefore, it is easy to detect discrimination symbols
- the head section has three symbols in addition to the discrimination symbol, and discriminates the head type based on the signal level patterns of these three symbols.
- the second largest symbol in the header section is used, and all the types of the header are used. It has the same polarity as the discriminating symbol and is set to the maximum amplitude level, and depends on the signal level pattern of the No. 3 and No. 4 symbols (that is, 2-bit information).
- the header type is indicated, but this is only an example, and the discrimination symbol is excluded. ⁇ The header pattern is set arbitrarily. However, as described later, in the ⁇ receiver, the frequency of the received signal is one-half the symbol frequency.
- Extract the number component in the bus down Doba scan full Note1 it plays the click lock signal Tsu by the extraction result of its in and the child to enter the PLL. Therefore, in order to obtain a stable extraction result from the noise filter, the signal in the data section is used.
- the fluctuation pattern of the signal level (upper level ⁇ lower level ⁇ upper level ⁇ lower level) remains unchanged.
- the signal level of each symbol in the header section should be set to BX.o For example, if the header section is If it consists of an even number of symbols, change the polarity of the signal level of the last symbol in the header to-
- Fig. 7 shows the configuration of the remote receiver.
- O Fig. 7 shows that the differential receiver 40 is transmitted from the remote transmitter 10 shown in Fig. 1.
- the transmitted signal is input through the Vdist cable 24.
- the differential receiver 40 has two sources, the source cable 24. Outputs the difference between the signals transmitted by the line
- This output is converted into a digital signal by an A / D converter 38.
- the output of the A / D converter 38 is a difference calculator.
- the difference calculating unit 36 sequentially calculates, for each symbol, a difference in signal level between the first symbol and the next symbol, and outputs the result.
- the relation between the received signal and the calculation result of the difference calculation unit 36 is shown.o
- the calculation result of the difference calculation unit 36 is input to the quaternary determination unit 28.
- the 4-value determination section 28 has a discrimination symbol detection section 30 for detecting the discrimination symbol from the received signal, and reproduces V-da information from the header section of the reception signal.
- the receiver judging unit 3 2 reproduces the received data (corresponding to the transmitting data in FIG. 1) from the received signal coordinating unit. 4 and o
- the division corresponding to the discrimination symbol can be clearly seen from Fig. 8.
- O The discrimination symbol detection unit 30 monitors the output of the detection unit 36 and outputs 0 as the difference calculation result that centers on a certain symbol. Is output, and the symbol is detected as a discrimination symbol.
- the o-V discriminator 32 and the ⁇ -ta discriminator 34 are provided by the discrimination symbol detector. Based on the detection result of 30, the output part and the output part are determined, and the processing is performed for each part. 0 Describes the operation of the data judgment unit 3 4 0
- the 7 "data determination section 34 refers to the conversion table shown in FIG. 9 and sequentially converts the difference calculation result into a code of 0 or 1 and outputs the result.
- the calculated result is -3, -1, +1, +3, and 0 is output to the position where the difference was found, and the difference calculation output result is-
- reception completion data is reproduced at the 7 "data determination section 34.
- the header discrimination section 32 Based on the detection result of the discrimination symbol detection section 30, the header discrimination section 32 outputs four symbols from the discrimination symbol (that is,
- the header type is determined based on the difference calculation result corresponding to the V header portion. 0
- the third symbol and the fourth symbol of the header portion are determined. Refer to the difference calculation results corresponding to each
- the head judging unit can judge that the lever is a V and a lever based on the judgment table shown in Fig. 10. 3 2-outputs the lidar type determined as the head information as header information.
- the discrimination symbol detection unit 30 monitors the output of the difference calculation unit 36 and sets 0 as a difference calculation result corresponding to a certain symbol.
- the symbol is detected as the discrimination symbol.
- the M V pin of the discrimination symbol in the T-card transmitter 10 is used.
- the method is different from that of the present embodiment.
- the operation of the discriminating symbol detection section 30 needs to be minimized in the same manner.
- the signal level of the symbol immediately following the discrimination symbol Is greater than the reference level, in which case the signal level of the discrimination symbol
- the signal level is equal to or greater than the signal level of the direct symbol, and is equal to the signal level.
- the signal level of the symbol immediately following the symbol is smaller than the reference level, which means that the signal level of the discriminating symbol is the same as the signal level of the symbol
- the discrimination symbol detector detects the discrimination symbol by monitoring the change in the sign of the division result. To 0
- the ⁇ -ta part and the header part are collated on the basis of the discrimination symbol.
- the transmitter unit can distinguish between the header unit and the header unit and transmit the data.
- the present invention is not limited to the header portion, but should be used to transmit the data separately from the 7 "data.
- FIG. 11 shows a part of the configuration of the data transmitting apparatus. The point that the ⁇ ′ data transmitting device according to the embodiment differs from the data transmitting device according to the first embodiment shown in FIG.
- the header and the header of the DIF frame are input to the V respectively.
- Da discriminator 4 2 S / PDIF full les Motodzure arm to the the C 0 capacitor Ichin clauses reader unit, to the hand to determine the click da type, to set to determine source d'information f the results of V Dama Supply to the V-Ping section 16 o
- the buffer coder 44 is used to provide the noise to the V-section of the S / PDIF frame.
- the output data of the 0-nozzle encoder 44 that supplies the decryption result and supplies the decrypted result to the T-tagging section 18 is as follows.
- the S / PDIF controller D-the change in the value of the controller. 0 which is the same as that of the first embodiment.
- the signal transmitted from the 7 "transmitter is a signal having a waveform as shown in FIG.
- the header discriminator 42 and the buffer 44 are provided independently of the quaternary M-pin 12.
- the present invention is not limited to this.
- the header mapping part 16 and the T-head pinning part 18 are provided.
- the function of the header discriminator 4 2 and the bi-phase 4 4 may be configured in a LA that includes the functions of the respective sections.
- FIG. 13 shows a part of the configuration of the - ⁇ receiver of-.
- the difference between the y-channel receiver according to the embodiment and the router according to the first embodiment shown in FIG. 7 is that
- a header generation unit 46 and a bi-phase ladder 48 are provided after the quaternary information unit 28. Omit the description because it is
- the four-value determination section 28 receives the reproduced and transmitted header information based on the transmission signal transmitted from the transmitter. -The header information that is output and the header information are input to the header generation unit 46 and the header output unit 48, respectively.
- the header generation unit 4 6 is the header determination unit 3
- the no-fuzzy-slower 48 receives the transmission output from the data judging unit 34. Performs a phase change on the data, and outputs the modulation result as the end of the S / PDIF frame.
- the S / PDIF frame transmitted by the ⁇ -transmitter is reproduced.
- the header generator 46 and the noise coder 48 are independent of the quaternary determination unit 28.
- the present invention is not limited to this, but the present invention is not limited to this.
- the header determining unit 32 and the ⁇ -unit determining unit 34 may be replaced by a header generating unit 46. Occasionally, it is okay to configure it to include the functions of DA48 and O4, respectively.
- the radiated noise can be suppressed because the transmitter for two bits of the S / PDIF frame is transmitted as a symbol with four-level mapping. Also, it is difficult to transmit the header section of the 8-bit s / PDIF frame with 4 symbols, but the receiving side device ends up with the header section.
- the S / PDIF frame output from the S / PDIF connector D on the transmitting side can be used to identify the S / PDIF frame on the receiving side. Since it is easy to input data to the F controller as it is, there is no need to make any changes to the configuration of the existing SIF / DIF controller. Using a DIF system to minimize the use of conductors and T-bit data transfer can improve the efficiency.
- each of the T-transmitter and the receiver has only a transmitter transmission function and a receiver reception function.
- -these devices are equipped with both a data transmission function and a ⁇ data reception function.
- -It may be configured as a transmitter / receiver.
- the present invention is not limited thereto. Not only in the data part, but also in the case where the information that is to be transmitted separately from the data is transmitted as the non-authorized part 0
- a data identifier indicating the type of the data included in the copier (for example, the data included in the V ⁇ is an identifier that indicates whether the data is a data pointer or a video data).
- the control is an example of the information.
- the end information for specifying the time information, frame number, and scan line number for the end of the video included in the end part.
- Fig. 14 shows an example of a system configuration in which a data identifier is transmitted to a non-monitor unit.
- a data identifier is transmitted to a non-monitor unit.
- Fig. 15 shows the structure of the transmission 7 "data in the system shown in Fig. 15 o
- the transmission transmitter is transmitted in packet units 0 and each packet V
- the unit 1 is composed of an unordered unit and a V unit, and the unit 1 adds a different unit according to the data to be transmitted. Is based on the received non-printer part, and separates the output data from the video data and outputs the data separately. It contains a data identifier that indicates the data type of the data block.
- the start timing of each packet is a discrimination signal that is included in the non-data block.
- FIG. 17 shows the pattern of the signal waveform when each of the two bits of the filter section is mapped to a predetermined signal level as one symbol.
- Figure 17 shows the signal pattern of the non-interrupter section.In the example of Figure 17, in the latter half of the non-T printer section, the signal level is four per symbol. Take the level 16 0 pieces of information (that is, 4 bits of information)
- 8-valued mass is used as in this example.
- the non-filter part is composed of four symbols, but the number of symbols in the non-fracture part is arbitrary. By increasing the number of symbols, it is possible to transmit more information as a data identifier or control ⁇ data.
- the present invention relates to an S / P system in a system that can communicate between a plurality of devices in an in-vehicle LAN or the like.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005517347A JPWO2005074219A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置、伝送路符号化方法および復号方法 |
US10/530,278 US20060034388A1 (en) | 2004-01-28 | 2004-01-28 | Data sending device, data receiving device, transmission path encoding method, and decoding method |
PCT/JP2004/000746 WO2005074219A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置、伝送路符号化方法および復号方法 |
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PCT/JP2004/000746 WO2005074219A1 (ja) | 2004-01-28 | 2004-01-28 | データ送信装置、データ受信装置、伝送路符号化方法および復号方法 |
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US (1) | US20060034388A1 (ja) |
JP (1) | JPWO2005074219A1 (ja) |
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US7542535B2 (en) * | 2004-06-30 | 2009-06-02 | Intel Corporation | Method and apparatus for recovering a clock signal |
US8958276B1 (en) | 2012-10-31 | 2015-02-17 | Marvell International Ltd. | Optical disc drive high frequency modulation signal detection |
US9172426B2 (en) | 2013-03-07 | 2015-10-27 | Qualcomm Incorporated | Voltage mode driver circuit for N-phase systems |
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 |
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 |
JP2002216424A (ja) * | 2001-01-22 | 2002-08-02 | Ricoh Co Ltd | 多値データサンプリング装置と多値データのサンプリング方法 |
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US5898684A (en) * | 1996-12-19 | 1999-04-27 | Stanford Telecommunications, Inc. | TDMA burst receiver |
US6888886B2 (en) * | 2000-03-06 | 2005-05-03 | Yamaha Corporation | Interface apparatus and method for receiving serially-transmitted data |
US7139340B2 (en) * | 2002-06-28 | 2006-11-21 | Hitachi, Ltd. | Robust OFDM carrier recovery methods and apparatus |
JP2005020692A (ja) * | 2003-06-02 | 2005-01-20 | Matsushita Electric Ind Co Ltd | データ受信方法およびその装置、並びにデータ伝送システム |
-
2004
- 2004-01-28 US US10/530,278 patent/US20060034388A1/en not_active Abandoned
- 2004-01-28 JP JP2005517347A patent/JPWO2005074219A1/ja active Pending
- 2004-01-28 WO PCT/JP2004/000746 patent/WO2005074219A1/ja active Application Filing
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 |
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 |
JP2002216424A (ja) * | 2001-01-22 | 2002-08-02 | Ricoh Co Ltd | 多値データサンプリング装置と多値データのサンプリング方法 |
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JPWO2005074219A1 (ja) | 2007-11-15 |
US20060034388A1 (en) | 2006-02-16 |
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