JP2011155330A - Transmission system - Google Patents

Abstract

An object of the present invention is to reduce radiation noise of encoded data in a transmission system.
A transmission system according to the present invention converts a plurality of binary m-bit data input to an input unit 110 into a binary n-bit code by a predetermined mBnB conversion technique. Parts 120, 130, and 140. Then, the binary m-bit code obtained by converting the binary m-bit data input to the input unit 110 by any one of the conversion processing units 120, 130, and 140 among the plurality of conversion processing units 120, 130, and 140. The transmission part 170 which transmits digitization data is provided.
[Selection] Figure 1

Description

  The present invention relates to a transmission system.

  In a next-generation storage medium with a large storage capacity, it is necessary to greatly increase the transmission speed of information with the information device in order to enable smooth information transmission with the information device. A high-speed interface used for such information transmission uses a serial transfer method.

  At this time, the raw serial data may be in a Low or High state for a long period. For this reason, the clock may not be extracted from there. For example, 8-bit data in which 0 or 1 continues for a predetermined number or more (for example, “00000000”, “00000001”, “00000010”, “00000011”, “01111111”, “10000000”, “11111110”, “11111111”, etc.) Exists. For 8-bit data in which 0 or 1 continues for a predetermined period or longer, the Low or High state continues for a long period of time. Furthermore, such data may be continuous. For this reason, it is difficult to extract the clock in the method of serial transmission of raw serial data. In addition, when the transmission signal is in a low or high state for a long time, the so-called DC balance is lost. Therefore, a technique for encoding raw serial data is used to ensure an appropriate transition for extracting the clock and to maintain DC balance.

  As such an encoding technique, for example, there is a technique (8B10B conversion technique) for converting binary 8-bit (1 byte) data into binary 10-bit data. Here, “B” means “bit”. In such an 8B10B conversion technique, for example, a binary 10-bit code is assigned in advance to 256 binary 8-bit data. Such 8B10B conversion technology is used in high-speed interface standards such as “Serial-ATA” and “PCI-Express”, for example.

  In the 8B10B conversion technique, for example, a binary 10-bit code in which the numbers of 0 and 1 are the same or the difference between the numbers of 0 and 1 is two codes among binary 10-bit codes, and 0 is not consecutive for more than a certain value. It is assigned to 256 pieces of binary 8-bit data. In this way, by converting the raw serial data into appropriately assigned codes, it is possible to prevent 0 or 1 from continuing more than a predetermined value. In addition, in the transmitted signal, the numbers of 0 and 1 (Low and High states) are almost balanced, and so-called DC balance is improved.

  For example, in a typical 8B10B conversion technology, one binary 8-bit data is divided into the first 5 bits and the second 3 bits. Then, 5B6B conversion for converting the first 5 bits into a 6-bit code and 3B4B conversion for converting the latter 3 bits into a 4-bit code are performed. Table 1 shows a part of the conversion code table of the 8B10B conversion technology.

  In this case, for example, in the 5B6B conversion, a binary 6-bit code is selected in which the numbers of 0 and 1 are the same as the binary 5-bit code or the difference between the numbers of 0 and 1 is two. In addition, when a binary 6-bit code having two difference between 0 and 1 is selected, a binary 6-bit code obtained by logically inverting it is also assigned. In the latter half of the 3B4B conversion, a binary 4-bit code is selected in which the numbers of 0 and 1 are the same as the binary 3-bit code or the difference between the numbers of 0 and 1 is two. In addition, when a binary 4-bit code having two difference between 0 and 1 is selected, a binary 4-bit code obtained by logically inverting it is also assigned.

  For example, typically, “100111” + “0100” or “011000” + “1011” obtained by logically inverting this is assigned to binary 8-bit (1 byte) data “00000000”. Also, “011101” + “0100” or “100010” + “1011” obtained by logically inverting this is assigned to binary 8-bit (1 byte) data “00000001”. Further, for example, “110001” + “1001” is assigned to binary 8-bit (1 byte) data “00100011”, and the numbers 0 and 1 are converted into the same binary 10-bit code. . Similarly, a binary 10-bit code is assigned to 256 binary 8-bit data.

  When a binary 10-bit code converted by the 8B10B conversion technique is transmitted, the code to be transmitted is selected in consideration of the immediately preceding running disparity every 6 bits or 4 bits. In this case, if the number of 0s is two more than the number of 1s in the previous running disparity, the code with the same number of 0s and 1s or two more than the number of 0s is selected. It is. As for the previous running disparity, either the state where the number of 0 is one more than the number of 1 or the state where the number of 1 is one more than the number of 0 is preset as an initial value. Yes.

  Here, the running disparity is obtained by assigning -1 to 0 and +1 to 1 and summing all transmitted bits. Therefore, when 0 is large, it becomes a negative integer, and when 1 is large, it becomes a positive integer. In a binary 10-bit code converted by the 8B10B conversion technique, the running disparity is -1, 0, or +1 at the boundary between 6 bits and 4 bits.

  For example, when the running disparity is −1 in the immediately preceding running disparity (when the number of 0s is one more than the number of 1s), the number of 1s in the first six bits is greater than the number of 0s. Two more codes “100111” + “0100” are selected. On the other hand, when the immediately preceding running disparity is +1 (when the number of 1 is 1 more than the number of 0), the code “0” in which the number of 0s is 2 more than the number of 1s in the first six bits “ 011000 "+" 1011 "is selected. Thereby, DC balance is adjusted every 6 bits or 4 bits. In addition, when a binary 10-bit code having the same number of 0 and 1 is assigned to binary 8 bit (1 byte) data, the number of 0s in the immediately preceding running disparity and 1 In any case where the number of is large, the assigned code is used.

  Such an encoding technique is disclosed in, for example, Japanese Patent No. 3851274 (Patent Document 1).

Japanese Patent No. 385274

  In the encoding technique described above, when the same data is continuously transmitted, the same code is transmitted continuously. At this time, the signal transitions at a certain period of Low or High. In recent years, the frequency of signals has been increased in order to increase the transmission speed. If the same code is transmitted continuously, radiation noise may occur due to its periodicity.

  For example, in the 8B10B conversion technique, as described above, “1001110100” or “0110001011” obtained by logically inverting this is assigned to binary 8-bit (1 byte) data “00000000”. In this case, when binary 8-bit (1 byte) data “00000000” is continuously transmitted, the immediately preceding running disparity is considered.

  For example, when the previous running disparity is −1 (when the number of 0 is one more than the number of 1), “1001110100” is assigned to binary 8-bit (1 byte) data “00000000”. . In this case, the running disparity becomes −1 again. For this reason, when the previous running disparity is −1 and binary 8-bit (1 byte) data “00000000” is continuously transmitted, “1001110100” is continuously transmitted. Also, for example, when the previous running disparity is +1 (when the number of 0 is one more than the number of 1), “0110001011” is assigned to the binary 8-bit (1 byte) data “00000000” It is done. In this case, the running disparity becomes +1 again. For this reason, when the previous running disparity is +1, when binary 8-bit (1 byte) data “00000000” is continuously transmitted, “0110001011” is continuously transmitted. In this case, the same signal (“1001110100” or “0110001011”) is sent continuously in 10-bit units.

  As described above, in the 8B10B conversion technique, when the same binary 8-bit (1 byte) data is continuously transmitted, the same signal is continuously transmitted in units of 10 bits. If the same signal continues in units of 10 bits, periodicity may occur and radiation noise may be generated. Radiation noise based on such periodicity can occur not only in the 8B10B conversion technique but also in various mBnB conversion techniques (for example, 64B66B conversion technique) for converting binary m-bit data into binary n-bit code. . Accordingly, the present invention proposes a novel encoding technique that improves radiation noise based on such periodicity.

  The transmission system according to the present invention has a predetermined mBnB conversion technique for an input unit to which transmission data composed of a plurality of binary m-bit data is input, and binary m-bit data input to the input unit. Thus, a plurality of conversion processing units for converting into binary n-bit code, and binary m-bit data input to the input unit are converted by one of the plurality of conversion processing units. A transmission unit that transmits encoded data of binary n bits.

  According to this transmission system, binary m-bit encoded data obtained by converting binary m-bit data input to the input unit by any one of the plurality of conversion processing units is received by the receiving side. Sent to the device. The mBnB conversion technique for converting binary m-bit data input to the input unit can be changed in a timely manner. As a result, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused. Thereby, radiation noise can be reduced.

  The plurality of conversion processing units convert a binary m-bit data input to the input unit into a binary n-bit code by a predetermined mBnB conversion technique, and a first conversion You may provide the 2nd conversion process part which converts the code | symbol of the binary number n bit converted by the process part into the code | symbol of a different binary number n bit.

  In addition, a plurality of second conversion processing units are provided, and the plurality of second conversion processing units are codes converted by the first conversion processing unit by exclusive OR with predetermined binary n-bit reference codes. May be converted into a different binary n-bit code. In this case, the same reference numerals may be used for the plurality of second conversion processing units, respectively. Different reference numerals may be used for the plurality of second conversion processing units.

  The reference code includes, for example, a binary n-bit code used in the mBnB conversion technique of the first conversion processing unit and a binary n-bit code that is all 0 or all of binary n-bit codes. Any one binary n-bit code, excluding the 1 code, can be used.

  The second conversion processing unit may be configured to invert one or more predetermined bits of the binary n-bit code converted by the first conversion processing unit. For example, the second conversion processing unit is converted by the second conversion processing unit that inverts the first half of the binary n-bit code converted by the first conversion processing unit, and the first conversion processing unit. A second conversion processing unit that inverts the (np) bits in the latter half of the binary n-bit code may be included. (Here, p is an integer satisfying 1 ≦ p <n).

  In addition, the second conversion processing unit may replace predetermined bits in the binary n-bit code converted by the first conversion processing unit. For example, the second conversion processing unit may sequentially replace odd bits and even bits among the binary n-bit codes converted by the first conversion processing unit. Further, for example, the second conversion processing unit may reverse the binary n-bit code converted by the first conversion processing unit in reverse order.

  You may have the encoding process setting part which determines how the data of the binary number m bit input into the input part are encoded with a some conversion process part. The encoding processing setting unit may be configured to output a binary n-bit code converted by one conversion processing unit among the plurality of conversion processing units.

  The encoding processing setting unit turns on one of the plurality of conversion processing units, turns off the other, and the binary m-bit data input to the input unit 110 is turned on. The conversion processing unit may be configured to perform mBnB conversion.

  A transmission system includes a receiving unit that receives encoded data sent from a transmitting unit, and a decoding processing unit that decodes encoded data received by the receiving unit in accordance with processing in a plurality of conversion processing units. , May be provided. Also, the transmission system decodes the decoding processing information necessary for decoding the encoded data sent from the transmission unit into binary m-bit data inputted to the input unit, to the decoding processing unit A processing information transmission unit may be provided. In addition, the transmission system includes a detection unit that detects binary m-bit data to be transmitted. Based on the binary m-bit data to be transmitted detected by the detection unit, the same binary m-bit data is obtained. When transmitting continuously, you may comprise so that the process by a some conversion process part may be performed.

  The data transmission method according to the present invention includes an input step in which binary m-bit data to be transmitted is input, and binary m-bit data input in the input step, each of which is a plurality of mBnB conversions respectively determined in advance. An mBnB conversion step for converting the code into a binary n-bit code by one mBnB conversion process, and a transmission step for transmitting the encoded data of binary n-bit converted by the mBnB conversion step. .

  In this case, the mBnB conversion step may appropriately change the mBnB conversion process for converting the input binary m-bit data among a plurality of predetermined mBnB conversion processes. The mBnB conversion step includes a first conversion step for converting the binary m-bit data input in the input step into a binary n-bit code by a predetermined mBnB conversion process, and a first conversion step. A second conversion step of converting the converted binary n-bit code into a binary n-bit code different from the binary n-bit code converted by the first conversion step may be included.

  In the second conversion step, predetermined bits of the binary n-bit code converted in the first conversion step may be replaced.

  Further, an encoding process setting step for determining how to encode the binary m-bit data input to the input step may be provided before the transmission step. The encoding process setting step turns ON one mBnB conversion process among a plurality of mBnB conversion processes in the mBnB conversion step, turns OFF the other, and turns ON the binary m-bit data input in the input step. The mBnB conversion may be performed by the mBnB conversion process. Also, before the transmission step, decoding processing information for transmitting the decoding processing information necessary for decoding the encoded data sent in the transmission step into binary 8-bit data input in the input step. A transmission step may be provided.

  The present invention can realize a novel encoding technique that improves radiation noise based on periodicity.

The figure which shows the system configuration | structure which concerns on one Embodiment of a transmission system. The figure which shows the encoding process of the transmission system about Example 1. In Example 1, the figure which shows the serial signal of the code | symbol of the binary number 10 bits by 8B10B conversion by the 1st conversion process part The figure which shows the state which converted the serial signal in FIG. 3A from the time axis to the frequency axis. The figure which shows the serial signal of the coding data of Example 1. The figure which shows the state which converted the serial signal in FIG. 4A from the time axis to the frequency axis. The figure which shows the encoding process of the transmission system about Example 2. In Example 2, the figure which shows the serial signal of the code | symbol of the binary number 10 bits by 8B10B conversion by the 1st conversion process part The figure which shows the state which converted the serial signal in FIG. 6A from the time axis to the frequency axis. The figure which shows the serial signal of the coding data of Example 2. The figure which shows the state which converted the serial signal in FIG. 7A from the time axis to the frequency axis The figure which shows the encoding process of the transmission system about Example 3. The figure which shows the encoding process of the transmission system about Example 4. The figure which shows the encoding process of the transmission system about Example 5. The figure which shows the encoding process of the transmission system about Example 6. The figure which shows the system configuration | structure which concerns on other embodiment of a transmission system. The figure which shows the system configuration | structure which concerns on other embodiment of a transmission system. The figure which shows the system configuration | structure which concerns on other embodiment of a transmission system.

  Hereinafter, a transmission system according to an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment. Also, in different embodiments and examples, the same reference numerals are given to members and parts that exhibit the same action as appropriate.

(Transmission system 100)
Here, the transmission system 100 includes a transmission side device 101 and a reception side device 102. Each process of the transmission side device 101 and the reception side device 102 of the transmission system 100 is realized by an electronic circuit or a computer. Here, the computer includes, for example, a calculation unit such as a CPU that performs electrical calculation processing and a storage unit such as a nonvolatile memory that electrically stores data, and is based on preset programs and circuits. It is good to be comprised so that a predetermined calculation may be performed.

  As shown in FIG. 1, the transmission system 100 includes a plurality of conversion processes for converting binary m-bit data input to the input unit 110 into a binary n-bit code using a predetermined mBnB conversion technique. Part (120, 130, 140). The binary m-bit data input to the input unit 110 is converted into binary n-bit encoded data by any one of the plurality of conversion processing units (120, 130, 140). Sent. Since binary n-bit encoded data (encoded data, output signal) transmitted by the transmission unit 170 of the transmission-side device 101 is converted by a plurality of conversion processing units (120, 130, 140), the period Sex is disturbed. For this reason, the radiation noise which arises with transmission of the serial signal of encoded data can be suppressed small.

  The transmission system 100 will be described below. Here, a case will be described as an example where the transmission system 100 converts binary 8-bit data into a binary 10-bit code for transmission. The transmission system 100 is not limited to 8B10B conversion that converts binary 8-bit data into a binary 10-bit code, but other mBnB conversion that converts binary m-bit into binary n-bit encoded data. It can be applied to technology (for example, 64B66B conversion technology).

(Sending device 101)
As shown in FIG. 1, the transmission-side device 101 of the transmission system 100 includes an input unit 110, a plurality of conversion processing units (first conversion processing unit 120, second conversion processing units 130 and 140), and encoding processing. A setting unit 150, a serializer 160, and a transmission unit 170 are provided.

(Input unit 110)
The input unit 110 receives transmission data including a plurality of binary 8-bit data. The binary 8-bit data is composed of 8-bit data represented by 0 and 1 such as “00000000”, “00000001”, “00000010”, “00000011”, and the like. The binary 8-bit data input to the input unit 110 is converted into a binary 10-bit code by a plurality of conversion processing units 120, 130, and 140. In this embodiment, the plurality of conversion processing units includes a first conversion processing unit 120 and second conversion processing units 130 and 140.

(First conversion processing unit 120)
As shown in FIG. 2, the first conversion processing unit 120 converts binary 8-bit data input to the input unit 110 into a binary 10-bit code by a predetermined 8B10B conversion technique. Here, the 8B10B conversion technique is determined in advance by, for example, a standard. In this embodiment, as shown in Table 1 above, “1001110100” (RD−) and “0110001011” (RD +) obtained by logically inverting the data “00000000” of binary 8 bits (1 byte). ) And are assigned.

(Second conversion processing unit 130, 140)
Each of the second conversion processing units 130 and 140 converts the binary 10-bit code converted by the first conversion processing unit 120 into a different binary 10-bit code based on a predetermined conversion rule.

  In this embodiment, as shown in FIG. 2, the second conversion processing units 130 and 140 perform the first conversion processing unit 120 by exclusive OR (EXOR) with a predetermined binary 10-bit reference code. Is converted into a different binary 10-bit code. The “reference code” includes, for example, a binary 10-bit code used in the 8B10B conversion technique of the first conversion processing unit 120 and a binary 10-bit code, all of which are 0 or all. Any one binary 10-bit code can be used except for a code of 1.

  For example, “1111010011” can be used as the “reference code”. “1111010011” is a binary 10-bit code that is not used in the 8B10B conversion technique in this embodiment. In addition, the second conversion processing units 130 and 140 respectively use the same code “1111010011” as the “reference code”.

(Encoding processing setting unit 150)
The encoding process setting unit 150 converts the binary 8-bit data input to the input unit 110 to any one of a plurality of conversion processing units (120, 130, 140) (120, 130, 140). Determine whether to convert with.

  In this embodiment, the encoding process setting unit 150 includes an encoding process control unit 150a and a selector 150b. That is, in this embodiment, the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 are provided as a plurality of conversion processing units. The binary 8-bit data input to the input unit 110 is processed by the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140, respectively. Each conversion processing unit of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 sends an output signal to the selector 150b. The encoding process control unit 150a converts binary 8-bit data input to the input unit 110 into a binary 10-bit number converted by any of the plurality of conversion processing units (120, 130, 140). Determines whether to output the sign of. The encoding process control unit 150a sends a control signal c1 (select signal) to the selector 150b. Based on the control signal c1 sent from the encoding processing control unit 150a, the selector 150b performs conversion by a conversion processing unit defined by the encoding processing control unit 150a among the conversion processing units (120, 130, 140). The generated binary 10-bit code is output. Thereby, the mBnB conversion technique for converting binary m-bit data input to the input unit 110 can be changed in a timely manner.

  In this embodiment, the encoding processing setting unit 150 sequentially processes the input binary 8-bit data in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140. Output the encoded data. Specifically, binary 8-bit data first input to the input unit 110 by the encoding processing setting unit 150 is processed by the first conversion processing unit 120. Next, the binary 8-bit data input to the input unit 110 is processed by the second conversion processing unit 130. Next, the binary 8-bit data input to the input unit 110 is processed by the second conversion processing unit 140. Thus, in this embodiment, the binary 8-bit data input to the input unit 110 is converted into the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing by the encoding processing setting unit 150. The processing is sequentially performed by the unit 140. In this embodiment, the processing of the encoding processing setting unit 150 is realized by the encoding processing control unit 150a and the selector 150b.

  In this embodiment, the processing from the first conversion processing unit 120 to the encoding processing setting unit 150 is performed by a 10-bit parallel signal. The encoded data output from the encoding process setting unit 150 is transmitted to the serializer 160 as shown in FIG.

(Serializer 160)
The serializer 160 converts a 10-bit parallel signal into a 1-bit serial signal. For example, when the speed of a 10-bit parallel signal is 100 MHz, the serializer 160 converts the 10-bit parallel signal into a 1-bit serial signal by outputting a 10-times 1000-bit 1-bit serial signal. . Output data from the serializer 160 is transmitted to the receiving-side device 102 by the transmission unit 170.

(Transmitter 170)
The transmitting unit 170 transmits the encoded data of binary n bits converted by the first conversion processing unit 120 or the plurality of second conversion processing units 130 and 140. In this embodiment, binary 8-bit data input to the input unit 110 is converted into a binary n-bit code converted by a plurality of conversion processing units (120, 130, 140). The binary n-bit encoded data is converted into a 1-bit serial signal by the serializer 160. The transmission unit 170 transmits the 1-bit serial signal output by the serializer 160 to the reception-side device 102.

(Receiving device 102)
As shown in FIG. 1, the receiving-side device 102 of the transmission system 100 includes a receiving unit 210, a deserializer 220, and a decoding processing unit 230.

(Receiver 210)
The receiving unit 210 receives the encoded data sent from the transmitting unit 170 of the transmission side device 101 of the transmission system 100. In this embodiment, the transmission unit 170 of the transmission-side device 101 of the transmission system 100 transmits encoded data converted into a 1-bit serial signal by the serializer 160. The receiving unit 210 receives the encoded data converted into the 1-bit serial signal. The serial signal received by the receiving unit 210 is sent to the deserializer 220.

(Deserializer 220)
The deserializer 220 converts a serial signal into a parallel signal. In this embodiment, the deserializer 220 converts the 1-bit serial signal received by the receiving unit 210 into a 10-bit parallel signal. The 10-bit parallel signal converted by the deserializer 220 is sent to the decoding processing unit 230.

(Decoding processor 230)
The decoding processing unit 230 decodes the encoded data received by the receiving unit 210. In this embodiment, the decoding processing unit 230 decodes the encoded data received by the receiving unit 210 so as to correspond to the processing in the plurality of conversion processing units 120, 130, and 140 of the transmission side device 101.

  In this embodiment, the decoding processing unit 230 decodes the binary 8-bit data input to the input unit 110 based on the encoded data sent from the transmission unit 170. Decoding processing information necessary for decoding into binary 8-bit data is known in the receiving-side device 102 before encoded data obtained by encoding binary 8-bit data is transmitted. In this embodiment, the conversion rules in the plurality of conversion processing units 120, 130, and 140 are uniquely determined by a program set in the transmission-side device 101 or an installed circuit. Further, in this embodiment, the encoding rules (for example, the conversion rules in the plurality of conversion processing units 120, 130, and 140 and the order that is output in the encoding processing setting unit 150) are substantially the receiving side. This is a known state in the device 102 in advance. The receiving-side device 102 is set so as to be able to perform the decoding process based on the conversion rules in the plurality of conversion processing units 120, 130, and 140 and the order output in the encoding process setting unit 150.

  It should be noted that the encoding rules (for example, conversion rules in the plurality of conversion processing units 120, 130, 140, the order of output in the encoding processing setting unit 150, etc.) can be arbitrarily changed in the transmission side device 101. The transmission-side device 101 can be configured. In this case, the conversion rules in the plurality of conversion processing units 120, 130, and 140, the order of output in the encoding processing setting unit 150, and the like are substantially reduced before the encoded data is transmitted in the receiving device 102. It may be in an unknown state. In such a case, it is preferable to configure such unknown information in advance between the transmission-side device 101 and the reception-side device 102. Such an arrangement may be executed before encoded data is transmitted between the transmission-side device 101 and the reception-side device 102, for example. The receiving device 102 may be set so that an appropriate combination process is executed based on information decided in advance.

(Decoding processing information transmission unit 180)
Also, for example, as shown in FIG. 1, decoding processing information necessary for decoding encoded data sent from the transmission unit 170 into binary 8-bit data input to the input unit 110 is decoded. The decryption processing information transmission unit 180 may be provided to send to the conversion processing unit 230. In this embodiment, the decryption processing information transmission unit 180 includes a decryption processing information output unit 180a and a selector 180b, for example, as shown in FIG.

  The decoding process information output unit 180a is connected to the encoding process control unit 150a. The decoding processing information output unit 180a outputs decoding processing information c2 that generates decoding processing information c2 based on the encoding rules determined by the encoding processing control unit 150a. In this embodiment, the decoding processing information c2 is generated as a binary 10-bit signal. Also, the decryption processing information output unit 180a sends a control signal c3 (select signal) to the selector 180b.

  The selector 180b receives the binary 10-bit code output from the selector 150b of the encoding processing setting unit 150 and the decoding processing information c2 from the decoding processing information output unit 180a. The decoding process information c2 is output at an appropriate timing in accordance with the control signal c3 from the decoding process information output unit 180a. In this embodiment, the decoding process information c2 is encoded data from the encoding process setting unit 150 based on the control signal c4 from the encoding process setting unit 150 (encoding process control unit 150a in this embodiment). Is output before being transmitted.

(Modification of Decoding Process Information Transmitter 180)
Note that the configuration of the decryption processing information transmission unit 180 is not limited to the above configuration. In the above-described embodiment, the decoding process information transmission unit 180 generates the decoding process information c2 as a binary 10-bit signal as shown in FIG. Then, the decoding process information c2 is provided in front of the serializer 160 after the selector 150b of the encoding process setting unit 150 together with the binary 10-bit code output from the selector 150b of the encoding process setting unit 150. It is input to the selector 180b. The decoding processing information c2 is output at an appropriate timing in accordance with the control signal c3 from the decoding processing information output unit 180a.

  On the other hand, in the form shown in FIG. 12, the decoding processing information transmission unit 180 generates the decoding processing information c2 as a 1-bit signal as shown in FIG. The 1-bit decoding processing information c2 is input to the selector 180b provided in front of the rear transmission unit 170 of the serializer 160 together with the output signal of the serializer 160. The decoding processing information c2 is output at an appropriate timing in accordance with the control signal c3 from the decoding processing information output unit 180a. The decoding process information output unit 180a receives appropriate decoding process information c2 for generating the decoding process information c2 based on the encoding rules determined by the encoding process control unit 150a in this way. Any configuration can be adopted as long as it can be output.

  Thereby, the decoding processing unit 230 is based on the known conversion rules in the second conversion processing units 130 and 140 and the order output in the encoding processing setting unit 150 before the encoded data is transmitted. The encoded data received by the receiving unit 210 can be appropriately decoded.

  Hereinafter, how the transmission system 100 transmits binary 8-bit data will be described more specifically. The transmission system 100 is particularly useful when the same binary 8-bit data is continuously transmitted.

Example 1
The first embodiment relates to a case where, for example, binary 8-bit data “00000000” is continuously sent to the input unit 110. The binary 8-bit data “00000000” is converted to “1001110100” (a) by 8B10B conversion. Therefore, “1001110100” (a) is continuously output from the first conversion processing unit 120.

  In this case, as illustrated in FIG. 2, the second conversion processing units 130 and 140 convert the code “1001110100” (a) by exclusive OR (EXOR) with the reference code “1111010011”, respectively, and “0110100111”. "(A1)" is output.

  The encoding process setting unit 150 outputs the binary 10-bit codes respectively output from the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 in a predetermined order. In this embodiment, the encoding processing setting unit 150 converts the binary 10-bit code output from each of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 into the first conversion processing. Unit 120, second conversion processing unit 130, and second conversion processing unit 140 in this order. Therefore, “1001110100” (a) output by the first conversion processing unit 120, “0110100111” (a1) output by the second conversion processing unit 130, and “0110100111” output by the second conversion processing unit 140. (A1) is output in order.

  As a result, the encoded data is “1001110100” (a: output by the first conversion processing unit 120), “0110100111” (a1: output by the second conversion processing unit 130), “0110100111”, as shown in FIG. (A1: output by the second conversion processing unit 140), “1001110100” (a: output by the first conversion processing unit 120), “0110100111” (a1: output by the second conversion processing unit 130), “0110100111” (a1 : Output by the second conversion processing unit 140). In this way, it is possible to prevent “1001110100” (a: output from the first conversion processing unit 120) from continuing in the encoded data.

  As described above, in the first embodiment, signals (output signals) output from the encoding processing setting unit 150 of the transmission-side device 101 are “1001110100”, “0110100111”, “0110100111”, “1001110100”, “0110100111”. "... Such encoded data is output as a serial signal through the serializer 160. The receiving device 102 receives the signal by the receiving unit 210 and converts the serial signal into a 10-bit parallel signal by the deserializer 220. The 10-bit parallel signal output from the deserializer 220 is sent to the decoding processing unit 230.

  The decoding processing unit 230 receives the encoded data (output signal), and decodes the received encoded data (output signal) according to the processing of the transmission-side device 101. In this embodiment, the decoding processing unit 230 outputs a signal (output signal) output from the transmission-side device 101 (“1001110100”, “0110100111”, “0110100111”, “1001110100”, “0110100111”,...). Based on the above, the decoding process is performed, and the base data in which the binary 8-bit data “00000000” input to the input unit 110 of the transmission side device 101 is restored is restored.

  Here, FIG. 3A is a diagram illustrating a serial signal of a binary 10-bit code by 8B10B conversion by the first conversion processing unit in the first embodiment. As shown in FIG. 3A, a serial signal of a binary 10-bit code obtained by 8B10B conversion by the first conversion processing unit is a signal in which “1001110100” is continuous. FIG. 3B is a diagram in which the serial signal in FIG. 3A is converted from a time axis to a frequency axis.

  In contrast, FIG. 4A is a diagram illustrating a serial signal of encoded data (output signal) according to the first embodiment. As shown in FIG. 4A, the encoded data of Example 1 is shown. The encoded data output by the first embodiment is converted by the operations of the second conversion processing units 130 and 140 and the encoding processing setting unit 150. The serial signals of the encoded data (output signal) are “1001110100”, “0110100111”, “0110100111”, “1001110100”, “0110100111”,. FIG. 4B is a diagram obtained by converting the serial signal according to FIG. 4A from the time axis to the frequency axis.

  As is clear from the comparison between FIG. 3B and FIG. 4B, in the first embodiment, the frequency component of the serial signal of the encoded data (output signal) transmitted from the transmission unit 170 is spread. For this reason, the radiation noise which arises from coding data is reduced.

(Example 2)
Example 2 will be described below. The second embodiment relates to a case where binary 8-bit data “00011001” is continuously sent to the input unit 110. In this case, binary 8-bit data “00011001” is continuously sent to the first conversion processing unit 120. Then, the data is alternately converted into “1100011101” (a10) and “1100010010” (b10) by 8B10B conversion, and output from the first conversion processing unit 120.

  In this case, as illustrated in FIG. 5, the second conversion processing units 130 and 140 convert the code “1100011101” (a10) by exclusive OR with the reference code “1111010011”, respectively, and “0011001110” (a11 ) Is output. Similarly, the second conversion processing units 130 and 140 convert the code “1100010010” (b10) and output “0011000001” (b11).

  The encoding processing setting unit 150 converts the binary 10-bit code output from each of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 into the first conversion processing unit 120 and the second conversion processing unit 120. The conversion processing unit 130 and the second conversion processing unit 140 are output in this order.

  Accordingly, the encoded data is “1100011101” (a10: output by the first conversion processing unit 120), “0011000001” (b11: output by the second conversion processing unit 130), and “0011001110” (a11: second conversion processing). Output by the unit 140), "1100010010" (b10: output by the first conversion processing unit 120), "0011001110" (a11: output by the second conversion processing unit 130), "0011000001" (b11: second conversion processing unit 140) ), “1100011101” (a10: output by the first conversion processing unit 120), and so on. As described above, it is possible to prevent “1100011101” (a10) and “1100010010” (b10) from being alternately repeated in the encoded data.

  In the second embodiment, the second conversion processing units 130 and 140 convert the signal for the binary 10-bit code output from the first conversion processing unit 120. Further, the encoding processing setting unit 150 determines which of the plurality of conversion processing units processes binary 8-bit data input to the input unit 110. As a result, the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 output a binary 10-bit code in an appropriate order. Thereby, the periodicity of the encoded data can be disturbed, the frequency component of the encoded data can be diffused, and radiation noise can be reduced.

  In the second embodiment, the first conversion processing unit 120 alternately repeats two types of codes “1100011101” (a10) and “1100010010” (b10) by 8B10B conversion. In the second embodiment, three outputs are prepared: an output from the first conversion processing unit 120, an output from the second conversion processing unit 130, and an output from the second conversion processing unit 140. Then, the encoding processing setting unit 150 sequentially performs output by the first conversion processing unit 120, output by the second conversion processing unit 130, and output by the second conversion processing unit 140. Therefore, as shown in FIG. 5, signals (output signals) output from the transmission-side device 101 are “1100011101” (a10), “0011000001” (b11), “0011001110” (a11), “1100010010” ( b10), “0011001110” (a11), “0011000001” (b11), “1100011101” (a10), and so on. The output signal (encoded data) is output as a serial signal through the serializer 160.

  The receiving device 102 receives the signal by the receiving unit 210 and converts the serial signal into a 10-bit parallel signal by the deserializer 220. The 10-bit parallel signal output from the deserializer 220 is sent to the decoding processing unit 230. The decoding processing unit 230 receives the encoded data (output signal), and decodes the received encoded data (output signal) according to the processing of the transmission-side device 101. In the second embodiment, the decoding processing unit 230 also outputs signals (output signals) (“1100011101”, “0011000001”, “0011001110”, “1100010010”, “0011001110”, “ , 0011000001 ”,“ 1100011101 ”,...), It is possible to decode data in which the binary 8-bit data“ 00011001 ”input to the input unit 110 of the transmission-side device 101 is continuous.

  Here, irrespective of the second embodiment, the codes “1100011101” (a10) and “1100010010” (b10) are alternately repeated for signals output by the 8B10B conversion by the first conversion processing unit 120. FIG. 6A is a diagram illustrating a serial signal of a binary 10-bit code by 8B10B conversion by the first conversion processing unit in the second embodiment. As shown in FIG. 6A, in the serial signal, “1100011101” (a10) and “1100010010” (b10) are alternately repeated. FIG. 6B is a diagram obtained by converting the serial signal according to FIG. 6A from the time axis to the frequency axis.

  In contrast, FIG. 7A is a diagram illustrating a serial signal of encoded data (output signal) according to the second embodiment. As shown in FIG. 7A, serial signals of the encoded data are “1100011101”, “0011000001”, “0011001110”, “1100010010”, “0011001110”, “0011000001”, “1100011101”,. FIG. 7B is a diagram obtained by converting the serial signal according to FIG. 7A from the time axis to the frequency axis.

  As is apparent from the comparison between FIG. 6B and FIG. 7B, in the second embodiment, the frequency component of the serial signal of the encoded data (output signal) transmitted from the transmission unit 170 is diffused, so that radiation noise is reduced. Is done.

  As described above, according to the transmission system 100, a plurality of conversion processes for converting binary 8-bit data input to the input unit 110 into a binary 10-bit code using a predetermined 8B10B conversion technique. Parts 120, 130, and 140. Then, a transmission unit 170 that transmits the encoded data of binary 10 bits converted by any one of the conversion processing units 120, 130, and 140 among the plurality of conversion processing units 120, 130, and 140 is provided. As described above, since the plurality of conversion processing units 120, 130, and 140 for converting into a binary 10-bit code are provided, the mBnB conversion technique for converting the input binary m-bit data can be changed in a timely manner. it can. As a result, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused. Thereby, radiation noise can be reduced.

  The embodiment described above includes the second conversion processing units 130 and 140 that convert the binary n-bit code converted by the first conversion processing unit 120 into a different binary n-bit code. In this case, the binary n-bit code converted by the first conversion processing unit 120 can be converted on a small scale by the second conversion processing units 130 and 140. In this case, a plurality of conversion processing units 120, 130, and 140 can be provided with a simple configuration. In the embodiment described above, the second conversion processing units 130 and 140 differ in the code converted by the first conversion processing unit 120 by exclusive OR with a predetermined binary 10-bit reference code. Convert to binary 10-bit code. Thus, the code converted by the first conversion processing unit 120 can be converted into a different binary 10-bit code. For this reason, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused.

  In the above-described embodiment, the second conversion processing units 130 and 140 use the same reference numerals. Not limited to this, different reference numerals may be used for the second conversion processing units 130 and 140. For example, the second conversion processing unit 130 may use the reference symbol A “1111010011”, and the second conversion processing unit 140 may use the reference symbol B “1111010100”. By using different reference codes for the second conversion processing units 130 and 140, even if the codes converted by the first conversion processing unit 120 are the same, the second conversion processing units 130 and 140 each have a different binary 10-bit number. Can be converted into a code. As a result, the periodicity of the encoded data can be further disturbed, the frequency component of the encoded data can be further diffused, and the generated radiation noise can be suppressed more effectively.

  The reference codes include binary n-bit codes used in the mBnB conversion technique of the first conversion processing unit 120, and binary n-bit codes that are all 0s or all 1s. Any one of the binary n-bit codes may be used. In this embodiment, among binary 10-bit codes, a binary 10-bit code used in the 8B10B conversion technique of the first conversion processing unit 120, and a binary 10-bit code with all 0s or all 1s. Any one binary 10-bit code is used. Thereby, in each of the second conversion processing units 130 and 140, appropriate conversion is performed on the binary n-bit code used in the mBnB conversion technique. For example, in the 8B10B conversion, a binary 10-bit code having four differences between 0 and 1 (for example, “1111010011”) is not used in the 8B10B conversion technique. As the binary 10-bit reference code used in the 8B10B conversion technique, an appropriate code can be adopted from among four binary 10-bit codes in which the difference between 0 and 1 is four.

  In the above-described embodiment, the second conversion processing units 130 and 140 change the codes converted by the first conversion processing unit 120 to different 2 by exclusive OR with a predetermined binary 10-bit reference code. It is converted to a 10-bit decimal code. The conversion rules in the second conversion processing units 130 and 140 are not limited to the form using exclusive OR.

  For example, the second conversion processing units 130 and 140 illustrated in FIG. 1 may be configured to invert some bits of the binary n-bit code converted by the first conversion processing unit 120. Also in such a form, the second conversion processing units 130 and 140 can convert the binary n-bit code converted by the first conversion processing unit 120 into a different binary n-bit code.

  Here, “invert the bit” means that the signal of the bit is set to “0” when the signal of the bit is “1”. Further, when the signal of the bit is “0”, the signal of the bit is set to “1”.

  For example, the second conversion processing unit 130 can be configured to invert the first p bits of the binary n-bit code converted by the first conversion processing unit 120. In this case, still another second conversion processing unit 140 may be configured to invert the latter (n−p) bits of the binary n-bit code converted by the first conversion processing unit 120. . Here, p is an integer satisfying 1 ≦ p <n.

  For example, for a binary 10-bit code, p = 5 may be provided, and a second conversion processing unit 130 that inverts the first 5 bits and a second conversion processing unit 140 that inverts the second 5 bits may be provided. . Specific examples will be described below.

(Example 3)
In the third embodiment, among the plurality of second conversion processing units 130 and 140, the second conversion processing unit 130 has a binary 10-bit code converted by the first conversion processing unit 120 as illustrated in FIG. 8. The first 5 bits are inverted (first 5 bits are inverted). On the other hand, the second conversion processing unit 140 inverts the last 5 bits of the binary 10-bit code converted by the first conversion processing unit 120 (the latter 5 bits are inverted).

  Hereinafter, a case where binary 8-bit data “00000000” is continuously sent to the input unit 110 will be described in the third embodiment. The binary 8-bit data “00000000” is converted to “1001110100” (a) by 8B10B conversion. Therefore, “1001110100” (a) is continuously output from the first conversion processing unit 120. In the second conversion processing unit 130 that inverts the first 5 bits, “1001110100” (a) output from the first conversion processing unit 120 is converted to “0110010100” (a21). Further, in the second conversion processing unit 140 that inverts the latter 5 bits, “1001110100” (a) output from the first conversion processing unit 120 is converted into “1001101011” (a22).

  The input binary 8-bit data is sequentially processed by the encoding processing setting unit 150 in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140, and then output. Therefore, the encoded data output from the encoding processing setting unit 150 is “1001110100” (a), “0110010100” (a21), “1001101011” (a22), “1001110100” ( a), “0110010100” (a21), “1001101011” (a22), and so on.

  Thus, in the third embodiment, “1001110100” (a), “0110010100” (a21), “1001101011” (a22), “1001110100” ( a), “0110010100” (a21), “1001101011” (a22),. Thus, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused.

Example 4
Next, a case where binary 8-bit data “00011001” is continuously sent to the input unit 110 will be described. As shown in FIG. 9, binary 8-bit data “00011001” is converted into encoded data in which “1100011101” (a10) and “1100010010” (b10) are alternately repeated by 8B10B conversion. Therefore, the first conversion processing unit 120 outputs encoded data in which “1100011101” (a10) and “1100010010” (b10) are alternately repeated.

  The second conversion processing unit 130 inverts the first 5 bits of the binary 10-bit code output from the first conversion processing unit 120 (first half 5 bit inversion). The second conversion processing unit 140 inverts the last 5 bits of the binary 10-bit code output from the first conversion processing unit 120 (second half 5 bit inversion).

  In the second conversion processing unit 130 that inverts the first 5 bits, “1100011101” (a10) output from the first conversion processing unit 120 is converted to “0011111101” (a31). In the second conversion processing unit 140 that inverts the latter five bits, “1100011101” (a10) output from the first conversion processing unit 120 is converted into “1100000010” (a32).

  Further, in the second conversion processing unit 130 that inverts the first 5 bits, “1100010010” (b10) output from the first conversion processing unit 120 is converted to “0011110010” (b31). In the second conversion processing unit 140 that inverts the latter 5 bits, “1100010010” (b10) output from the first conversion processing unit 120 is converted to “1100001101” (b32).

  The input binary 8-bit data is sequentially processed by the encoding processing setting unit 150 in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140, and then output. Therefore, the encoded data output from the encoding processing setting unit 150 is “1100011101” (a10), “0011110010” (b31), “1100000010” (a32), “1100010010” ( b10), “0011111101” (a31), “1100001101” (b32),.

  As described above, in the fourth embodiment, “1100011101” (a10), “0011110010” (b31), “b11”, “1100011101” (a10), “1100010010” (b31), 110000010 ”(a32),“ 1100010010 ”(b10),“ 0011111101 ”(a31),“ 1100001101 ”(b32),... Thus, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused.

  Although an example has been described above, the second conversion processing units 130 and 140 may be configured to invert one or more predetermined bits of the binary n-bit code converted by the first conversion processing unit 120. Good. Thereby, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused. In the third and fourth embodiments, the configuration in which the first 5 bits of the binary 10-bit code are inverted is exemplified, and the latter 5 bits of the binary 10-bit code is inverted. Thereby, the periodicity can be greatly disturbed. The bit to be inverted may be arbitrarily determined in advance.

  Note that the bit to be inverted is not limited to the above example. For example, a configuration that inverts odd bits of a binary 10-bit code, and a configuration that inverts even bits of a binary 10-bit code may be adopted. Also, any bit of the binary 10-bit code may be inverted. For example, the arbitrarily defined third to sixth bits may be inverted in the binary 10-bit code. The number of bits to be inverted can be arbitrarily set, and one or a plurality of bits may be inverted. Further, the bits to be inverted may be continuous or distributed.

  Furthermore, another embodiment will be described.

  The second conversion processing units 130 and 140 may be configured to replace predetermined bits of the binary n-bit code converted by the first conversion processing unit 120.

(Example 5)
For example, as illustrated in FIG. 10, the second conversion processing unit 130 sequentially replaces the odd bits and the even bits in the binary n-bit code converted by the first conversion processing unit 120 (bit replacement 1). In this embodiment, the second conversion processing unit 130 includes the first and second bits, the third and fourth bits, the fifth and sixth bits, the seventh and eighth bits, the ninth and tenth bits. Replace each bit. For example, when a binary 10-bit code “1001110100” (a) is input, the second conversion processing unit 130 outputs “0110111000” (a41) by sequentially switching odd bits and even bits.

  In addition, the second conversion processing unit 140, for example, replaces the binary n-bit code converted by the first conversion processing unit 120 in reverse order (bit replacement 2). For example, when a binary 10-bit code “1001110100” (a) is input, the second conversion processing unit 140 performs the first bit, the tenth bit, the second bit, the ninth bit, the third bit, and the eighth bit. The fourth bit, the seventh bit, the fifth bit, and the sixth bit are switched. In this way, the second conversion processing unit 140 outputs “0010111001” (a42) by switching the code of the binary number of 10 bits in the reverse order.

  The input binary 8-bit data is sequentially processed by the encoding processing setting unit 150 in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140, and then output. Therefore, the encoded data output from the encoding processing setting unit 150 is “10011110100” (a), “0110111000” (a41), “0010111001” (a42), “1001110100” ( a), “0110111000” (a41), “0010111001” (a42), and so on.

(Example 6)
In addition, as shown in FIG. 11, a case will be described in which binary 8-bit data “00011001” is continuously sent to the input unit 110. The binary 8-bit data “00011001” is converted into encoded data in which “1100011101” (a10) and “1100010010” (b10) are alternately repeated by 8B10B conversion. Therefore, the first conversion processing unit 120 outputs encoded data in which “1100011101” (a10) and “1100010010” (b10) are alternately repeated.

  In addition, the second conversion processing unit 130 sequentially replaces the odd bits and the even bits in the binary 10-bit code converted by the first conversion processing unit 120 (bit replacement 1). In this embodiment, the second conversion processing unit 130 includes the first and second bits, the third and fourth bits, the fifth and sixth bits, the seventh and eighth bits, the ninth and tenth bits. Swap each bit.

  For example, when a binary 10-bit code “1100011101” (a10) is input, the second conversion processing unit 130 outputs “1100101110” (a51) by sequentially switching odd bits and even bits. When a binary 10-bit code “1100010010” (b10) is input, the second conversion processing unit 130 outputs “1100100001” (b51) by sequentially switching odd bits and even bits.

  In addition, the second conversion processing unit 140, for example, replaces the binary n-bit code converted by the first conversion processing unit 120 in reverse order (bit replacement 2). In this embodiment, the second conversion processing unit 140 includes the 1st and 10th bits, the 2nd and 9th bits, the 3rd and 8th bits, the 4th and 7th bits, the 5th and 6th bits. Replace each bit.

  For example, when a binary number 10-bit code “1100011101” (a10) is input, the second conversion processing unit 140 outputs “1011100011” (a52) by switching the binary number n-bit code in reverse order. When a binary 10-bit code “1100010010” (b10) is input, the second conversion processing unit 140 outputs “0100100011” (b52) by switching the binary n-bit code in reverse order.

  The input binary 8-bit data is sequentially processed by the encoding processing setting unit 150 in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140, and then output. For this reason, the encoded data output from the encoding processing setting unit 150 is “1100011101” (a10), “1100100001” (b51), “1011100011” (a52), “1100010010” ( b10), “1100101110” (a51), “0100100011” (b52),. Thus, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused.

  In the fifth and sixth embodiments described above, the second conversion processing unit 130 interchanges the odd bits and the even bits in the binary 10-bit code converted by the first conversion processing unit 120 in order. Also, the second conversion processing unit 140, for example, replaces the binary 10-bit code converted by the first conversion processing unit 120 in reverse order. Here, an example of converting a binary 10-bit code has been illustrated, but the code is not limited to a binary 10-bit code. It can be applied to convert a binary n-bit code output by an arbitrary mBnB conversion.

  In addition, the second conversion processing units 130 and 140 may be configured to replace predetermined bits of the binary n-bit code converted by the first conversion processing unit 120. The bit to be replaced is not limited to the examples given in the fifth and sixth embodiments. For example, the second conversion processing unit 130 may be configured to switch arbitrarily defined s-th and t-th bits among the binary n-bit codes converted by the first conversion processing unit 120. . s and t are arbitrarily determined from integers satisfying 1 ≦ s ≦ n, 1 ≦ t ≦ n, and s ≠ t. Also, the number of bits to be replaced can be arbitrarily determined.

  In addition, the second conversion processing units 130 and 140 replace predetermined bits of the binary n-bit code converted by the first conversion processing unit 120. In this case, before and after being processed by the second conversion processing units 130 and 140, the numbers of 0 and 1 in the binary n-bit code do not change. For this reason, the encoded data output from the encoding process setting unit 150 can maintain the DC balance of the mBnB conversion. Since the DC balance of the mBnB conversion can be maintained, the Low and High states of the transmission signal can be made almost uniform.

(Modification of encoding process setting unit 150)
The encoding processing setting unit 150 determines how the transmission-side device 101 of the transmission system 100 encodes binary 8-bit data input to the input unit 110 with a plurality of conversion processing units. In the embodiment described above, the encoding processing setting unit 150 sequentially processes the input binary 8-bit data in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140. The encoded data is output.

  Note that the configuration of the encoding process setting unit 150 is not limited to such a configuration. For example, the order in which the input binary 8-bit data is processed and output by the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140 is arbitrarily determined. be able to. Thereby, the mBnB conversion technique for converting the input binary m-bit data can be changed in a timely manner. For example, when there are three conversion processing units, there are six combinations in the order of the first conversion processing unit 120, the second conversion processing unit 130, and the second conversion processing unit 140.

(1) First conversion processing unit 120, second conversion processing unit 130, second conversion processing unit 140
(2) Second conversion processing unit 130, second conversion processing unit 140, first conversion processing unit 120
(3) Second conversion processing unit 140, first conversion processing unit 120, second conversion processing unit 130
(4) Second conversion processing unit 140, second conversion processing unit 130, first conversion processing unit 120
(5) Second conversion processing unit 130, first conversion processing unit 120, second conversion processing unit 140
(6) First conversion processing unit 120, second conversion processing unit 140, second conversion processing unit 130
These six combinations may be used in an appropriate order. Thereby, the periodicity of encoded data can be further disturbed, and radiation noise can be further reduced. For example, six combinations may be used in ascending order and then used in descending order. (1) → (2) → (3) → (4) → (5) → (6) → (6) → (5) → (4) → (3) → (2) → (1). Such an example is only an example.

  As described above, the encoding processing setting unit 150 determines how to encode the binary 8-bit data input to the input unit 110 using a plurality of conversion processing units. The encoding processing setting unit 150 can arbitrarily set how the binary 8-bit data input to the input unit 110 is encoded by a plurality of conversion processing units. For example, the encoding processing setting unit 150 may be set so that binary 8-bit data input to the input unit 110 is processed in an appropriate order by a plurality of conversion processing units.

  Further, as described above, in the transmission system 100 having such mBnB conversion technology, the problem of radiation noise considered by the present inventor arises particularly when the same binary m-bit data is continuously transmitted. . For this reason, as shown in FIG. 12, a detection unit 152 that detects binary m-bit data to be transmitted may be provided. In this case, when the transmission system 100 continuously transmits the same binary m-bit data based on the transmitted binary m-bit data d1 detected by the detection unit 152, the second conversion processing unit You may comprise so that the process by 130,140 may be performed.

  In the form shown in FIG. 12, a detection unit 152 that detects binary m-bit data to be transmitted is provided. In this embodiment, the detection unit 152 can detect the binary m-bit data d1 to be transmitted, and determines whether or not the same binary m-bit data is continuously transmitted based on the detection. be able to. In this embodiment, when the same binary m-bit data is continuously transmitted based on the transmitted binary m-bit data d1 detected by the detection unit 152, the encoding process setting unit 150 is controlled. Signal d2 is emitted. Then, the encoding processing setting unit 150 performs the processing by the second conversion processing units 130 and 140 when continuously transmitting the same binary m-bit data based on the control signal d2. It is configured.

  As described above, in the 8B10B conversion, one binary 10-bit code is assigned to one binary 8-bit data, and two binary 10-bit codes are assigned. There may be. In the form in which two second conversion processing units 130 and 140 are provided, a total of three conversion processing units 120, 130, and 140 can be prepared for binary 8-bit data together with the first conversion processing unit 120. .

  In the above-described embodiment, since three conversion processing units 120, 130, and 140 are prepared, when two binary 10-bit codes are assigned to one binary 8-bit data, By using the three conversion processing units 120, 130, and 140 in order, the periodicity of the encoded data can be appropriately disturbed. Thus, by preparing three conversion processing units 120, 130, and 140 for one binary 8-bit data, the periodicity of the encoded data can be appropriately disturbed by simple control.

  Note that, as described above, the periodicity of the encoded data is an encoding process setting that determines how the binary 8-bit data input to the input unit 110 is encoded by a plurality of conversion processing units. It can also be disturbed by the part 150. Therefore, the number of second conversion processing units 130 and 140, conversion rules, and settings of the encoding processing setting unit 150 can be appropriately adjusted. In the above-described embodiment, two second conversion processing units 130 and 140 are provided. However, the number of second conversion processing units 130 and 140 is not limited to two, and one or a plurality of second conversion processing units 130 and 140 may be provided. it can.

  Further, in the above-described embodiment, a configuration including the second conversion processing units 130 and 140 that convert the binary n-bit code converted by the first conversion processing unit 120 into a different binary n-bit code is illustrated. Has been. The plurality of conversion processing units may have a configuration for converting binary m-bit data input to the input unit 110 into a binary n-bit code using a predetermined mBnB conversion technique. The configuration of the processing unit is not limited to such a form. Other embodiments will be exemplified below.

(Embodiment shown in FIG. 13)
For example, FIG. 13 is a block diagram illustrating a configuration of the transmission-side device 101 according to another embodiment. In this embodiment, the transmission-side device 101 includes a plurality of conversion processing units 131, 132, and 133, an encoding process setting unit 150, a selector 150b, and a decoding process information transmission unit 180.

(Conversion processing units 131, 132, 133)
The conversion processing units 131, 132, and 133 convert binary m-bit data into binary n-bit code by a predetermined mBnB conversion technique. In the example illustrated in FIG. 13, three conversion processing units 131, 132, and 133 are illustrated, but the conversion processing units 131, 132, and 133 are not limited to three, and include two or more. Also good. As the conversion rules of the conversion processing units 131, 132, and 133, for example, a configuration in which the conversion rules of the first conversion processing unit 120 and the second conversion processing units 130 and 140 described above are appropriately combined can be employed. Further, at least one of the conversion processing units 131, 132, and 133 only needs to adopt a different conversion rule. Preferably, the conversion processing units 131, 132, and 133 may employ different conversion rules.

  For example, in this embodiment, the conversion processing unit 131 converts binary m-bit data into a binary n-bit code by a predetermined mBnB conversion. The conversion processing unit 132 converts the binary m-bit data into a binary n-bit code by a predetermined mBnB conversion, and further converts some of the binary n-bit codes that have been determined in advance. Swap bits. The conversion processing unit 133 converts the binary m-bit data into a binary n-bit code by a predetermined mBnB conversion. Further, with respect to the converted binary n-bit code, the conversion processing unit 132 Swap some different bits. As described above, the conversion processing units 131, 132, and 133 employ different conversion rules.

(Encoding processing setting unit 150)
In this embodiment, the encoding processing setting unit 150 is configured to output a binary n-bit code converted by one conversion processing unit among the plurality of conversion processing units 131, 132, and 133.

  That is, in this embodiment, the encoding process setting unit 150 includes an encoding process control unit 150a and a selector 150b. The encoding processing control unit 150 a determines how the binary m-bit data input to the input unit 110 is encoded by the plurality of conversion processing units 131, 132, and 133. In this embodiment, binary m-bit data input to the input unit 110 is converted by a plurality of conversion processing units 131, 132, and 133, respectively. Each conversion processing unit 131, 132, 133 outputs the converted binary n-bit code to the selector 150b. The encoding processing control unit 150a includes binary n-bits converted by any of the conversion processing units 131, 132, and 133 among the binary n-bit codes converted by the plurality of conversion processing units 131, 132, and 133, respectively. Is output to the selector 150b.

  In this embodiment, the encoding processing control unit 150a determines which of the conversion processing units 131, 132, and 133 outputs the binary 10-bit code converted according to a preset program or circuit. The select signal q1 is sent to the selector 150b. The encoding process control unit 150a is configured to change the select signal q1 output from the encoding process control unit 150a to the selector 150b based on the external signal q3. Accordingly, the encoding processing setting unit 150 uses any of the conversion processing units 131, 132, and 133 among the plurality of conversion processing units 131, 132, and 133 prepared in advance based on the external signal q3. It can be determined whether mBnB conversion of binary m-bit data input to the unit 110 is performed. Note that the encoding process setting unit 150 may be configured to change the select signal q1 output to the selector 150b based on the external signal q3.

(Selector 150b)
The selector 150b receives output signals from the conversion processing units 131, 132, and 133. Then, based on the select signal q1 sent from the encoding processing control unit 150a, a binary n-bit code converted by one conversion processing unit among the conversion processing units 131, 132, 133 is output. To do. In the form shown in FIG. 13, the binary n-bit code output from the selector 150 b is converted into a 1-bit serial signal by the serializer 160 and output from the transmission unit 170 to the reception-side device 102 (see FIG. 1). .

(Decoding processing information transmission unit 180)
In this embodiment, the transmission-side device 101 includes a decryption processing information transmission unit 180 that transmits the decryption processing information q2 to the decryption processing unit 230 (see FIG. 1) on the reception-side device 102 side. The decoding process information q2 is information necessary for decoding the binary n-bit code output from the selector 150b into binary m-bit data input to the input unit 110. In this embodiment, the decoding processing information transmitting unit 180 is configured to convert any binary m-bit data input to the input unit 110 from among a plurality of conversion processing units 131, 132, and 133. Decoding processing information q 2 (a signal corresponding to the select signal q 1) indicating whether or not the data has been converted is output to the transmission side device 101. In addition to the transmission unit 170 that transmits the serial signal of the encoded data output from the serializer 160, a transmission unit 171 that transmits the decoding processing information is provided. The decryption processing information transmission unit 180 sends the decryption processing information q2 to the transmission unit 171.

  In this case, when the conversion rule of each of the conversion processing units 131, 132, and 133 is not known in the receiving device 102, the decryption processing information transmission unit 180 transmits the conversion rule to the receiving device 102. Configure. For example, the conversion rule may be transmitted to the reception-side device 102 before encoded data obtained by encoding binary 8-bit data is transmitted.

  Furthermore, other embodiments will be described. FIG. 14 is a block diagram illustrating a configuration of the transmission-side device 101 according to another embodiment. For example, as illustrated in FIG. 14, the encoding processing setting unit 150 turns on one conversion processing unit among a plurality of conversion processing units 131, 132, and 133, turns off the other, and is input to the input unit 110. The binary m-bit data may be converted to mBnB by the conversion processing unit turned on.

  In the embodiment illustrated in FIG. 14, the encoding process setting unit 150 includes an encoding process control unit 150a and a selector 150b. The encoding processing control unit 150a is configured to send switching signals r1, r2, and r3 for switching ON / OFF of the conversion processing units 131, 132, and 133 to the conversion processing units 131, 132, and 133, respectively. In this case, the encoding processing setting unit 150 turns on one conversion processing unit among the conversion processing units 131, 132, and 133 and turns off the other at appropriate times. Further, the conversion processing units 131, 132, and 133 to be turned on are changed for each binary m-bit data input to the input unit 110.

  For example, when the conversion processing unit 131 is turned on and the conversion processing units 132 and 133 are turned off, the binary m bits input to the input unit 110 are mBnB converted by the conversion processing unit 131 that is turned on. . When the conversion processing unit 132 is turned on and the conversion processing units 131 and 133 are turned off, the binary m-bit data input to the input unit 110 is mBnB-converted by the conversion processing unit 132 that is turned on. . In the embodiment shown in FIG. 14, the binary m-bit data input to the input unit 110 is subjected to mBnB conversion by the conversion processing unit turned ON by the encoding processing control unit 150a. The encoding process control unit 150a sends a select signal q1 to the selector 150b. The selector 150b outputs, to the serializer 160, a binary n-bit code that has been mBnB-converted by the conversion processing unit turned on based on the select signal q1. The mBnB converted binary n-bit code is converted into a serial signal through the serializer 160 and output from the transmission unit 170 to the reception-side device 102.

  In this case, the rule for turning ON or OFF the conversion processing units 131, 132, 133 set in the encoding processing control unit 150a may be configured to be changed by the external signal q3. Further, the rule set in the encoding process control unit 150 a for turning on or off the conversion processing units 131, 132, and 133 may be configured to be known to the reception-side device 102 in advance. Further, the rule set in the encoding processing control unit 150a to turn on or off the conversion processing units 131, 132, and 133 is, for example, before encoded data obtained by encoding binary m-bit data is transmitted. Alternatively, it may be transmitted to the receiving device 102.

  13 and 14, binary m-bit data input to the input unit 110 is converted by any one of the plurality of conversion processing units 131, 132, and 133. The binary n-bit encoded data is transmitted to the receiving-side device 102. The mBnB conversion technique for converting binary m-bit data input to the input unit 110 can be changed in a timely manner. As a result, the periodicity of the encoded data can be disturbed, and the frequency component of the encoded data can be diffused. Thereby, radiation noise can be reduced.

  The transmission system according to the embodiment of the present invention has been described above, but the transmission system according to the present invention is not limited to the above-described embodiment. Each structure of the transmission system 100 which concerns on each embodiment mentioned above can be combined suitably. The transmission system 100 described above is an embodiment that embodies the following data transmission method.

  The data transmission method according to an embodiment of the present invention includes, for example, an input step (s1), an mBnB conversion step (s2), and a transmission step (s3) as shown in FIG.

  In the input step (s1), binary m-bit data to be transmitted is input. In the mBnB conversion step (s2), the binary m-bit data input in the input step (s1) is converted into a binary n-bit code by one mBnB conversion technique among a plurality of predetermined mBnB conversion techniques. Convert to The transmission step (s3) transmits the encoded data of binary n bits converted by the mBnB conversion step (s2). Such a data transmission method is embodied, for example, by the transmission system 100 shown in FIG. 1, and detailed description thereof is omitted here.

  According to this data transmission method, the binary m-bit data input in the input step (s1) is converted into a binary n-bit code by one mBnB conversion technique among a plurality of predetermined mBnB conversion techniques. (MBnB conversion step (s2)). Then, the binary n-bit encoded data converted by the mBnB conversion step (s2) is transmitted to the receiving side device 102 (transmission step (s3)). In this case, the periodicity of the encoded data is changed by changing the mBnB conversion technique for converting the input binary m-bit data in a timely manner by one mBnB conversion technique among a plurality of predetermined mBnB conversion techniques. Can be disturbed. Then, the frequency component of the encoded data can be diffused, and thereby radiation noise can be reduced.

  In the form shown in FIG. 1, the mBnB conversion step (s2) appropriately changes the mBnB conversion process for converting the input binary m-bit data among a plurality of predetermined mBnB conversion processes.

  In the form shown in FIG. 1, the mBnB conversion step (s2) converts the binary m-bit data inputted in the input step (s1) into a binary n-bit code by a predetermined mBnB conversion process. The binary n-bit code converted by the first conversion step (s21) and the binary n-bit code converted by the first conversion step (s21) are: A second conversion step (s22) for converting the code into a different binary n-bit code.

  Thus, the binary m-bit data to be transmitted is converted into a binary n-bit code by the mBnB conversion technique (first conversion step (s21)) and appropriately converted by the first conversion step. The binary n-bit code is converted into a different binary n-bit code (second conversion step (s22)). Then, the binary n-bit encoded data converted by the first conversion step (s21) or the second conversion step (s22) is transmitted (transmission step (s3)).

  In this way, this data transmission method is a binary n-bit code converted by the mBnB conversion technique and a binary n-bit code different from the binary n-bit code as appropriate. It is possible to transmit encoded data of n-ary digits. For this reason, since the transmitted binary n-bit encoded data is disturbed in periodicity, it is possible to suppress radiation noise caused by transmission of binary n-bit encoded data.

  In this case, the second conversion step (s22) may replace predetermined bits of the binary n-bit code converted by the first conversion step (s21). In this case, the binary n-bit code converted by the second conversion step (s22) can maintain the DC balance of the mBnB conversion. For this reason, the DC balance of mBnB conversion can be maintained in the binary n-bit encoded data transmitted by the transmission step (s3). As a result, the Low and High states can be made substantially uniform in the transmitted binary n-bit encoded data.

  Further, before the transmission step (s3), there may be provided an encoding process setting step (s4) for determining how to encode the binary m-bit data input to the input step (s1). Good. In this case, it is possible to appropriately set how to determine how to encode the binary m-bit data input in the input step (s1).

  In this case, the encoding process setting step (s4) turns on one mBnB conversion process among the plurality of mBnB conversion processes in the mBnB conversion step (s2), turns off the other, and inputs in the input step (s1). The binary m-bit data thus converted may be converted to mBnB by the mBnB conversion process turned on.

  Further, before the transmission step (s3), the decoding process necessary for decoding the encoded data sent in the transmission step (s3) into the binary 8-bit data input in the input step (s1). A decoding process information transmission step (s5) for transmitting information may be provided. As a result, it is possible to perform an appropriate decoding process according to the encoding process for the encoded data transmitted in the transmission step (s3). In particular, when determining how to encode binary m-bit data input to the input step (s1) before the transmission step (s3), decoding processing information corresponding to the encoding processing is determined. Therefore, it is possible to configure so that an appropriate decoding process based on the decoding process information is performed. As a result, the encoding process can be changed as appropriate.

  The transmission system according to the present invention enables smooth information transmission between a storage medium having a large storage capacity and an information device, and is useful for an information electronic device that needs to significantly increase the transmission speed of information.

DESCRIPTION OF SYMBOLS 100 Transmission system 101 Transmission side apparatus 102 Reception side apparatus 110 Input part 120 1st conversion process part 130 2nd conversion process part 131 Conversion process part 132 Conversion process part 133 Conversion process part 140 2nd conversion process part 150 Encoding process setting part 150a encoding processing control unit 150b selector 152 detecting unit 160 serializer 170 transmitting unit 171 transmitting unit 180 decoding processing information transmitting unit 180a decoding processing information output unit 180b selector 210 receiving unit 220 deserializer 230 decoding processing unit c1 encoding processing control Control signal (select signal) sent from the section 150a to the selector 150b
c2 Decoding processing information c3 Control signal (select signal) sent from the decoding processing information output unit 180a to the selector 180b
c4 Control signal sent from the coding process control unit 150a to the decoding process information output unit 180a d1 binary m-bit data to be transmitted detected by the detection unit 152 d2 Control signal sent to the coding process setting unit 150 q1 control Signal (select signal)
q2 decoding processing information q3 external signal r1 switching signal r2 switching signal r3 switching signal

Claims (24)

An input unit to which transmission data composed of a plurality of binary m-bit data is input;
A plurality of conversion processing units for converting binary m-bit data input to the input unit into binary n-bit code by a predetermined mBnB conversion technique; and
A transmission unit for transmitting binary m-bit encoded data obtained by converting binary m-bit data input to the input unit by any one of the plurality of conversion processing units;
A transmission system equipped with. The plurality of conversion processing units are:
A first conversion processing unit that converts binary m-bit data input to the input unit into a binary n-bit code by a predetermined mBnB conversion technique; and
A second conversion processing unit that converts the binary n-bit code converted by the first conversion processing unit into a different binary n-bit code;
The transmission system according to claim 1, comprising: A plurality of the second conversion processing units are provided, and each of the plurality of second conversion processing units is converted by the first conversion processing unit by exclusive OR with a predetermined binary n-bit reference code. The transmission system according to claim 2, wherein the code is converted into a different binary n-bit code. The transmission system according to claim 3, wherein the plurality of second conversion processing units use the same reference numerals. The transmission system according to claim 3, wherein different reference numerals are used for the plurality of second conversion processing units. The reference code includes a binary n-bit code, a binary n-bit code used in the mBnB conversion technique of the first conversion processing unit, and a binary n-bit code in which all 0s or all 1s are used. The transmission system according to any one of claims 3 to 5, wherein any one of the binary n-bit codes excluding is used. 3. The transmission system according to claim 2, wherein the second conversion processing unit inverts one or more predetermined bits of the binary n-bit code converted by the first conversion processing unit. The second conversion processing unit
A second conversion processing unit for inverting the first p bits of the binary n-bit code converted by the first conversion processing unit; and
The transmission system according to claim 2, further comprising: a second conversion processing unit that inverts the latter half (n−p) bits of the binary n-bit code converted by the first conversion processing unit.
Here, p is an integer satisfying 1 ≦ p <n. The second conversion processing unit
The transmission system according to claim 2, wherein a predetermined bit is replaced in a binary n-bit code converted by the first conversion processing unit. The transmission system according to claim 9, wherein the second conversion processing unit sequentially switches odd bits and even bits among the binary n-bit codes converted by the first conversion processing unit. The transmission system according to claim 9, wherein the second conversion processing unit replaces the code of the binary n-bit converted by the first conversion processing unit in reverse order. 12. The method according to claim 1, further comprising: an encoding processing setting unit that determines how the plurality of conversion processing units encode binary m-bit data input to the input unit. The transmission system described in the section. The transmission system according to claim 12, wherein the encoding processing setting unit is configured to output a binary n-bit code converted by one of the plurality of conversion processing units. The encoding processing setting unit turns on one of the plurality of conversion processing units, turns off the other, and the binary m-bit data input to the input unit 110 is turned on. The transmission system according to claim 13, wherein the transmission system is configured to perform mBnB conversion by the conversion processing unit. A receiving unit for receiving encoded data sent from the transmitting unit; and
A decoding processing unit for decoding the encoded data received by the receiving unit in correspondence with the processing in the plurality of conversion processing units;
A transmission system according to any one of claims 1 to 14, comprising: Decoding processing information transmission for transmitting to the decoding processing unit decoding processing information necessary for decoding the encoded data sent from the transmitting unit into binary m-bit data input to the input unit The transmission system according to claim 15, comprising a unit. When having a detection unit for detecting binary m-bit data to be transmitted, and continuously transmitting the same binary m-bit data based on the binary m-bit data detected by the detection unit The transmission system according to any one of claims 1 to 16, wherein processing by the plurality of conversion processing units is executed. An input step in which binary m-bit data to be transmitted is input;
An mBnB conversion step of converting the binary m-bit data input in the input step into a binary n-bit code by one mBnB conversion process among a plurality of predetermined mBnB conversion processes; and
A transmission step of transmitting binary n-bit encoded data converted by the mBnB conversion step;
A data transmission method comprising: 19. The data transmission method according to claim 18, wherein the mBnB conversion step appropriately changes mBnB conversion processing for converting input binary m-bit data among a plurality of predetermined mBnB conversion processing. The mBnB conversion step includes:
A first conversion step of converting the binary m-bit data input in the input step into a binary n-bit code by a predetermined mBnB conversion process; and
A second conversion step of converting the binary n-bit code converted by the first conversion step into a binary n-bit code different from the binary n-bit code converted by the first conversion step;
A data transmission method according to claim 18 or 19, comprising: 21. The data transmission method according to claim 20, wherein in the second conversion step, a predetermined bit is replaced in a binary n-bit code converted in the first conversion step. 21. The encoding process setting step of determining how to encode the binary m-bit data input to the input step before the transmission step. A data transmission method according to claim 1. The encoding process setting step turns on one mBnB conversion process among a plurality of mBnB conversion processes in the mBnB conversion step, turns off the other, and converts the binary m-bit data input in the input step, The data transmission method according to claim 22, wherein the mBnB conversion is performed by the mBnB conversion process turned on. Before the transmission step, the decoding processing information necessary for decoding the encoded data sent in the transmission step into the binary 8-bit data input in the input step is transmitted. The data transmission method according to any one of claims 18 to 23, further comprising a processing information transmission step.

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