JP2001204019A - Data transmission method and data transmission device - Google Patents

Abstract

(57) Abstract: Word string data including word synchronization data formed based on data to be transmitted is 8B / 10B.
It is assumed that a plurality of digital video signals can be multiplex-transmitted by a transmission method in which conversion and S / P conversion are performed and transmitted. A multiplexing process is performed on a plurality of digital video signals or a combination of a plurality of digital video signals and a bit addition signal to form word string data, and an additional word data group including word synchronization data is inserted therein. 8B / 10B conversion is performed on the word string data obtained by using a P / S conversion unit having a built-in 8B / 10B conversion unit, and a compound including the word synchronization data after the 8B / 10B conversion based on the word synchronization data is obtained. It forms word string data, converts the compound word string data into serial data, and transmits the serial data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The invention described in the claims of the present application obtains word string data by multiplexing a plurality of digital video signals or a combination of a plurality of digital video signals and bit addition signals. A data transmission method for performing processing such as insertion of word synchronization data and 8 bit / 10 bit conversion on the word string data to form composite word string data, and converting it to serial data for transmission And a data transmission device provided for the implementation.

[0002]

2. Description of the Related Art In the field of transmission of digital data containing information data representing various kinds of signal information such as image information, the digital data is converted into serial data, an electric signal based on the serial data is obtained, and the signal is coaxial. A system for transmitting data through a transmission line formed using a cable or twisted pair line,
Alternatively, digital data is converted into serial data, and the serial data is converted into an optical signal, and the optical
A system for transmitting data through a transmission line formed using fibers has been put to practical use.

As one of such digital data transmission systems, a fiber channel system (Fibr
e Channel System) is known. Digital data handled under a digital data transmission system such as this fiber channel system is converted at the transmission side into, for example, 10 bits every 8 bits, and the conversion table is prepared in advance. , And is converted to 10-bit word string data by performing an 8-bit / 10-bit conversion (8B / 10B conversion). And what is actually transmitted is 8B
The serial data is obtained by further performing parallel / serial conversion (P / S conversion) on the 10-bit word string data formed by performing the / 10B conversion.

[0004] On the receiving side, serial / parallel conversion (S / P conversion) is performed on the received serial data.
Is performed to form 10-bit word string data, and the 10-bit word string data is converted into 8 bits for every 10 bits, and the conversion is performed according to a conversion table prepared in advance. Bit / 8-bit conversion (10B / 8B conversion) is performed. Thus 10B / 8
From the word string data formed by performing the B conversion processing,
The original digital data is reproduced.

[0005] As described above, data transmission in which digital data to be transmitted is subjected to 8B / 10B conversion provides good transmission quality by using 10-bit words having selected contents. Has been recognized as.

Further, digital data transmitted as 10-bit word string data under a digital data transmission system such as a fiber channel system is referred to as a "frame" as shown in FIG. It follows the data format in which the smallest independent packet is formed. The "frame" shown in FIG. 13 is composed entirely of 2148 bytes, and includes a 4-byte frame start portion, a 24-byte frame header portion, and a 64-byte optional header portion. , A 2048-byte payload portion, a 4-byte error check portion, and a 4-byte frame end portion are sequentially connected.

[0007] A 2048-byte payload portion of each portion constituting these "frames" stores 10-bit word string data representing signal information. That is,
When the 10-bit word string data is transmitted,
On the transmitting side, a "frame" in which a 10-bit word string data of a maximum of 2048 bytes is stored in the payload portion
Are formed, and are sequentially transmitted. On the receiving side, 10-bit word string data is extracted from the payload portion of each of a number of sequentially arriving "frames".

In each of the 10-bit word data (10-bit word data) in such 10-bit word string data, 10 bits constituting the word data have the following structure.
The number of “1” is greater than the number of “0”, the number of “0” is greater than the number of “1”, or the number of “1” is equal to the number of “0”. In expressing the respective states of “1” and “0”, for example, running disparity (Running Disparit)
y: RD) is introduced. When the number of “1” is larger than the number of “0”, it is said that the running disparity (RD) is positive, and the number of “0” is “ When the number of “1” is larger than the number of “1”, the RD is said to be negative, and when the number of “1” is equal to the number of “0”, the RD is said to be neutral. And the number of “1” is “0”
Is greater than the number of "1", and the word data having the number of "0" greater than the number of "1" is R
Word data in which D is negative and word data in which the number of "1" is equal to the number of "0" are referred to as word data in which RD is neutral (neutral word data).

When the 10-bit word string data is transmitted as described above, the receiving side performs S / P conversion on the received serial data to obtain 10-bit word string data based on the serial data. Is the 10B / 8B conversion performed on the 10-bit word string data obtained by the S / P conversion,
It is necessary to properly grasp each word data of the 10-bit configuration. Therefore, on the transmission side, the 10-bit word string data transmitted as serial data is assumed to be appropriately inserted with word synchronization data. You. The word synchronization data is a 10-bit word data, but has a specific code that is not used as the 10-bit word data for transmitting information. When the word synchronization data is inserted, if the immediately preceding word data has a negative RD, the RD is assumed to be positive.
Is positive, RD is negative.

Such word synchronization data is, for example,
This is 10-bit word data DS10 called by a code name of K28.5. FIG. 14 shows 10-bit word data D called by a code name of K28.5.
S10, and the 10-bit word data DS10
Is "001" when RD is positive when CRD, which is RD based on the word data arranged immediately before, is negative (-).
111 1010 ", and when the CRD, which is the RD based on the immediately preceding word data, is positive (+), it is set to" 110000 0101 "in which the RD is negative (hereinafter" 001111 1010 "is replaced by + K28). .5
And "110000 0101" is -K2
8.5).

On the other hand, in the field of video signals, digital transmission of video signals has been attempted from the viewpoint of diversifying transmitted information and improving the quality of reproduced images in connection with the transmission. Standardized digital video signals for digital transmission of video signals have been proposed, such as 4: 2: 2 component digital video signal (D1 signal) and 4fsc composite digital video signal (D2 signal). It has been known. The D1 signal, the D2 signal, and the like are, for example, a Y data sequence represented by 10-bit word string data representing a luminance signal component in a video signal and a C _B represented by 10-bit word string data representing a color difference signal component in a video signal. / _CR data sequence is subjected to word multiplexing processing, and a predetermined portion of the resulting word multiplexed data sequence is
Timing reference code data (SAV: Start of Activ
e Video and EAV: End of Active Video). SAV and EAV play the role of word synchronization data.

For example, the data sequence constituting the D1 signal takes the form of 10-bit word string data.
It follows the data format as shown in FIG. FIG. 15 shows a line blanking period in each line period of the D1 signal and a portion corresponding to a part of the video data period before and after the line blanking period. In such a part, immediately before a part corresponding to each video data period, four words (3F) each having a 10-bit configuration are used.
SAV, which is timing reference code data composed of F, 000,000, XYZ), is provided, and immediately after a portion corresponding to each video data period, four words (3FF, 000,000, 10FF) each having a 10-bit configuration are provided. 000, XY
Z) EAV which is timing reference code data
Is arranged. 3FF and 000 are fixed value information displayed in hexadecimal, XYZ is variable value information displayed in hexadecimal, and indicates field identification, field blanking period identification, and SAV and EAV identification.

The D1 signal forming the 10-bit word string data as shown in FIG. 15 is converted to serial data by P / S conversion and transmitted when transmitted. Then, on the receiving side, a portion based on SAV or EAV in the received serial data is detected, and S /
The P conversion is performed, and the D1 signal is reproduced.

Further, digital data representing image information, that is, digital image information data usually has a huge data amount. For example, when the data is transmitted or recorded, the quality of the data is substantially reduced. It is desired that the data is compressed so that the data amount can be reduced without lowering the data. Therefore, various researches and developments have been made on data compression techniques for reducing the data amount of digital image information data. One of the results is digital information representing image information, especially moving image information. As a method for implementing data compression of digital image information data, which is data, MPEG which is a working group under the technical committee under the international standardization organization
(Moving Picture Experts Group)
A standard system called MPEG which has been approved as a standard has been proposed.

In the standard system called MPEG, digital image information data is subjected to data compression by high-efficiency encoding. However, high-efficiency encoding of digital image information data in accordance with MPEG is performed. When data compression is performed by data compression, it is possible to achieve an extremely high compression rate of data compression, and to provide a high quality image reproduced based on the data compressed digital image information data. The possible benefits are obtained. Therefore, in the field of business or home electronic equipment such as digital video cameras and digital video tape recorders, digital image information data (MPEG image information data) subjected to data compression by high-efficiency encoding according to MPEG. There is a tendency that the number of people who handle is increasing. In general, MPEG image information data forms 8-bit word string data.

The compressed digital video signal data such as the MPEG image information data and the compressed digital video and audio signal data obtained by adding the audio data to the compressed digital video signal data are transmitted as serial data through a transmission path. SDTI (Serial DataTra) has been developed as an interface
An nsport interface has been proposed.
This SDTI is based on SMPTE (Society of Motio)
n Picture and Television Engineers: “SMPTE 305M”.

[0017] Even in the signal format under the SDTI (SDTI signal format), timing reference code data is allocated during each line period as necessary. Then, S used for transmission of compressed digital video signal data or video and audio signal data is used.
A digital signal (SDTI signal) formed according to the DTI signal format is also converted from parallel data to serial data and transmitted in the form of a transmission signal that is an electric signal or an optical signal.

The D1 signal, D2 signal, SDT as described above
Regarding the transmission of digital video signals such as I signals, the transmission side includes word synchronization data based on the digital video signals to be transmitted, as described above.
Word string data subjected to B / 10B conversion is formed,
The transmission method in which the word string data is converted into serial data and transmitted is performed. For example, an existing integrated circuit element (IC element) or the like can be effectively used in configuring a transmission / reception circuit. This is what is desired from a viewpoint.

[0019]

As described above, on the transmitting side, word string data including word synchronization data and subjected to 8B / 10B conversion based on data to be transmitted is formed, and the word string is formed. With a transmission system in which data is converted to serial data and transmitted, D
When transmission of digital video signals such as one signal, D2 signal, SDTI signal, etc. is desired, not only one digital video signal but also a plurality of digital video signals can be multiplexed and transmitted. , D2 signal, SD
Efficient use of digital video signals such as TI signals is achieved, and the range of use is expanded. Efficient use of digital video signals such as D1 signal, D2 signal, SDTI signal and the like, expansion of the use range, and the like, for example, will bring about further development of technology in the field of business or home electronic devices. .

However, conventionally, on the transmitting side, word string data including word synchronization data and subjected to 8B / 10B conversion is formed based on data to be transmitted, and the word string data is serialized. A transmission system that can multiplex and transmit digital video signals such as a plurality of D1 signals, D2 signals, and SDTI signals with a transmission method that is converted into data and transmitted is realized by means that can relatively easily prepare digital video signals. No specific example was found. Also, a document and the like describing a technique relating to a transmission system capable of multiplex transmission of digital video signals such as a plurality of D1 signals, D2 signals, SDTI signals, etc., in a relatively easy manner. Can not be found.

In view of the above, according to the invention described in the claims of the present application, word string data that includes word synchronization data and is subjected to 8B / 10B conversion is formed based on data to be transmitted. A plurality of digital video signals, for example, a plurality of D1 signals, D2 signals, SDTI signals, etc., can be relatively easily prepared by a transmission method in which the word string data is converted into serial data and transmitted. Provided is a data transmission method and a data transmission device provided for implementing the method, which can be transmitted by means that can be used.

[0022]

According to a first aspect of the present invention, there is provided a data transmission method comprising a plurality of digital video signals or a plurality of digital video signals. A multiplexing process is performed on the combination of the bit string and the bit addition signal to obtain word string data based on a plurality of digital video signals or a combination of the plurality of digital video signals and the bit addition signal. At an interval, an additional word data group including word synchronization data having a preset code is inserted, and then the additional word data group is converted using a P / S converter having a built-in 8B / 10B converter. 8B / 1 in the inserted word string data
Form composite word string data having a portion based on the additional word data group, including word synchronization data after 8B / 10B conversion in which RD obtained based on the word synchronization data is positive or negative while performing 0B conversion. And
Further, the composite word string data is converted into serial data, and the serial data is transmitted for transmission.

In particular, in the data transmission method according to the invention described in claim 5 of the present application, a combination of a plurality of digital video signals and a bit addition signal
A digital video signal having a data format of 10-bit word string data of a channel and 2-bit additional data are formed. The word string data based on the digital video signal is converted into 8-bit word string data.
It is assumed that the data includes 8-bit word synchronization data, and that the composite word string data is converted to composite 10-bit word string data.

According to a tenth aspect of the present invention, there is provided a data transmission apparatus comprising: a plurality of digital video signals or a plurality of digital video signals and a bit addition signal; Signal multiplexing means for performing a multiplexing process on the combination of the word string data and word string data based on a combination of a plurality of digital video signals or a plurality of digital video signals and bit addition signals; and word string data obtained from the signal multiplexing means. A synchronous data inserting means for inserting an additional word data group including word synchronous data having a preset code at predetermined word intervals, and an additional word data group obtained from the synchronous data inserting unit. 8B / 10B conversion is performed on the word string data Word data including a part based on an additional word data group, including word synchronization data after 8B / 10B conversion in which the RD obtained is positive or negative, and further, the compound word string data is serialized. P / S conversion means having a built-in 8B / 10B conversion means for converting into data, and transmission means for transmitting serial data obtained from the P / S conversion means having a built-in 8B / 10B conversion means for transmission. It is composed.

In particular, in the data transmission apparatus according to the twelfth aspect of the present invention, the signal multiplexing means includes a digital video signal having a data format of three-channel 10-bit word string data and a two-bit digital video signal. A multiplexing process is performed on the combination with the bit-added data to obtain 8-bit word string data, and the synchronization data inserting means adds 8-bit word synchronization data to the 8-bit word string data obtained from the signal multiplexing means. It is assumed that an additional word data group including data is inserted, and further, 8B / 1
The P / S conversion means incorporating the 0B conversion means performs 8B / 10B conversion on the 8-bit word string data into which the additional word data group obtained from the synchronization data insertion means is inserted, and obtains the data based on the word synchronization data. RD
And a composite 10-bit word string including a part based on an additional word data group, including word synchronization data after 8B / 10B conversion in which is set to a predetermined positive or negative value. It is configured to convert column data into serial data.

In the data transmission method according to any one of the first to ninth aspects of the present invention as described above, for example, a plurality of D
The word string data into which an additional word data group is inserted based on a plurality of digital video signals such as one signal, D2 signal, SDTI signal, or a combination of a plurality of digital video signals and bit addition signals is 8B / 10
8B / 10 by P / S conversion means incorporating B conversion means
In transmitting after being subjected to B conversion and P / S conversion,
The compound word string data obtained through the 8B / 10B conversion in the P / S conversion means incorporating the 8B / 10B conversion means and converted into serial data includes word synchronization data having a predetermined positive or negative RD. Will be included. Such word synchronization data is, for example,
+ K28. Word data DS10 with RD being positive.
5, or -K28.5, which is the word data DS10 having a negative RD.

According to the data transmission method according to any one of the first to ninth aspects of the present invention, the composite word string data transmitted as serial data is transmitted by the receiving side. Whether the word synchronization data detection is performed by detecting only the word synchronization data whose RD is positive, or the detection is performed by detecting only the word synchronization data whose RD is negative, On the side, the word synchronization data is properly detected as word synchronization data required for processing for reproducing a plurality of digital video signals or a plurality of digital video signals and bit addition signals. Is done. Further, the word string data included in the compound word string data is obtained through 8B / 10B conversion, so that the word string data is formed using 10-bit words having the selected contents, thereby achieving good transmission quality. Will bring. Therefore, on the receiving side, reproduction of a plurality of digital video signals or a plurality of digital video signals and a bit addition signal based on the received composite word string data is performed under the condition that good transmission quality is obtained. A state in which the data synchronization state required for the processing for the purpose can be reliably obtained.

According to the data transmission method according to any one of the first to ninth aspects of the present invention, the data transmission method for the word string data into which the additional word data group is inserted is 8B. / 10B conversion, conversion of composite word string data obtained into serial data, transmission of the converted serial data, reception of serial data on the receiving side, composite bit word of received serial data Conversion to column data and the like can be performed using, for example, an integrated circuit device used for transmitting and receiving digital video signals under a fiber channel system. Therefore, word string data including word synchronization data is formed based on the data to be transmitted, and the word string data is subjected to 8B / 10B conversion and converted to serial data for transmission. With this transmission method, for example, a plurality of digital video signals, such as a plurality of D1 signals, D2 signals, and SDTI signals, can be transmitted by means that can be prepared relatively easily.

Further, in the data transmission apparatus according to any one of the tenth to twelfth aspects of the present invention, for example, a plurality of D1
8B / 10B to word string data into which an additional word data group is inserted based on a plurality of digital video signals such as a signal, a D2 signal, an SDTI signal, or a combination of a plurality of digital video signals and bit addition signals.
8B / 10B by P / S converter with built-in converter
A word having a predetermined positive or negative RD is included in the composite word string data which is formed by the conversion, is converted into serial data by the P / S conversion means having the built-in 8B / 10B conversion means, and is transmitted. Synchronous data will be included. Such word synchronization data is, for example, + K2 which is word data DS10 with RD being positive.
8.5 or word data DS1 with RD being negative
0, which is -K28.5.

The compound word string data transmitted as serial data by the data transmission apparatus according to any one of claims 10 to 12 in the claims of the present application is transmitted to Whether the word synchronization data detection is performed by detecting only the word synchronization data whose RD is positive, or the detection is performed by detecting only the word synchronization data whose RD is negative, On the side, the word synchronization data is properly detected as word synchronization data required for processing for reproducing a plurality of digital video signals or a plurality of digital video signals and bit addition signals. Is done. Further, the word string data included in the composite word string data is obtained through 8B / 10B conversion, so that the word string data is formed using 10-bit words having selected contents,
This will result in good transmission quality. Therefore, on the receiving side, reproduction of a plurality of digital video signals or a plurality of digital video signals and a bit addition signal based on the received composite word string data is performed under the condition that good transmission quality is obtained. A state in which the data synchronization state required for the processing for the purpose can be reliably obtained.

According to the data transmission apparatus according to any one of the tenth to twelfth aspects of the present invention, the data transmission apparatus includes 8B for the word string data into which the additional word data group is inserted. / 10
B-conversion, conversion of composite word string data obtained into serial data, transmission of the converted serial data, reception of serial data on the receiving side, composite bit word string of received serial data Conversion to data, such as Fiber Channel
This can be done using integrated circuit devices used for transmitting and receiving digital video signals under the system. Therefore, word string data including word synchronization data is formed based on the data to be transmitted,
The word string data is subjected to 8B / 10B conversion, converted into serial data, and transmitted to be transmitted. For example, a plurality of D1 signals, D2 signals, SDTI signals, and the like are transmitted. Can be transmitted by means that can be prepared relatively easily.

[0032]

FIG. 1 shows an example of a data transmission method according to the invention described in any one of claims 1 and 3 to 9 in the claims of the present application. An example of the data transmission device according to the invention described in claim 10 or claim 12 in the claims of the present application will be shown.

In the example shown in FIG. 1, a three-channel D1 signal DVP which is a plurality of digital video signals
1, DVP2 and DVP3 and the bit addition signal 2
The bit addition data DAB (2) is supplied to the signal multiplexing unit 10. 3 channel D1 signals DVP1 to DVP3
Are digital signals forming 10-bit word string data in the form of a data sequence as shown in FIG. 15, for example, and are parallel data having a word transmission rate of, for example, 27 MBps. The 2-bit additional data DAB (2) is 2-bit word string data in which words of a 2-bit configuration are consecutive, and the word transmission rate is selected to be, for example, 27 MBps.

In the signal multiplexing unit 10, the phases of the line periods in each of the three-channel D1 signals DVP1 to DVP3 are aligned, and the three-channel D1 signal DVP
VP1 to DVP3 and 2-bit additional data DAB
Under the condition that bit synchronization with (2) is taken, 3
A multiplexing process is performed on a combination of the channel D1 signals DVP1 to DVP3 and the 2-bit additional data DAB (2),
As a result, the three-channel D1 signals DVP1 to DVP
An 8-bit word string data DU (8) based on a combination of 3 and 2-bit additional data DAB (2) is obtained. In such a case, each word (10 bits) in each of the three-channel D1 signals DVP1 to DVP3 and each word (2 bits) in the 2-bit additional data DAB (2) supplied to the signal multiplexing unit 10 at the same time Of 10 × 3 + 2 =
The 32 bits are sequentially divided into 4 words of 8 bits each, so that the word transmission rate is 27 MBps × 32
/ 8 = 108 MBps 8-bit word string data D
U (8) is formed.

The three-channel D1 signals DVP1 to DVP3 supplied to the signal multiplexing unit 10 are arranged such that the phases of the line periods in each of them are aligned, so that the 8-bit word string data obtained as described above is obtained. DU
(8) has a line period, a line blanking period, and the like based on a line period, a line blanking period, and the like in each of the D1 signals DVP1 to DVP3. During each line blanking period of the 8-bit word string data DU (8), the D1 signals DVP1 to DVP are output.
3 based on the timing reference codes EAV and SAV in each of the EAV and SAV.
A horizontal synchronization data group composed of a plurality of horizontal synchronization word data is arranged between the AV and the SAV.

The 8-bit word string data DU (8) obtained from the signal multiplexing unit 10 is supplied to a synchronous data insertion unit 11. The synchronous data insertion unit 11 has a three-channel D
The horizontal synchronizing pulse signal SH in each of the one signal DVP1 to DVP3 is also supplied. Then, the synchronous data insertion unit 1
1, the 8-bit word string data DU (8) from the signal multiplexing unit 10 is supplied to the data selection and extraction unit 12,
The data selection / extraction section 12 is also supplied with an additional word data group DWS from the word data transmission section 13 at a word transmission rate of 108 MBps. The additional word data group DWS includes a plurality of 8-bit word data including word synchronization data having a preset code.

In the synchronous data insertion unit 11,
The horizontal synchronization pulse signal SH is supplied to the control signal forming section 14. The control signal forming unit 14 outputs the horizontal synchronization pulse signal SH
The control signal CWD and the control signal CDS are synchronized with the control signal CWD, and the control signal CWD is supplied to the word data transmission unit 13 and the control signal CDS is supplied to the data selection extraction unit 12.

Thus, the word data sending unit 13
Additional word data group DW according to control signal CWD
S is sent out and supplied to the data selection and extraction unit 12. When the control signal CDS is supplied, the data selecting / extracting section 12 extracts the additional word data group DWS from the word data transmitting section 13 in response to the control signal CDS. The 8-bit word string data DU (8) is taken out and the data is selectively taken out. The 8-bit word string data DU (8) from the signal multiplexing unit 10 is output during the line blanking period of each line period. , A process of inserting the additional word data group DWS from the word data transmitting unit 13 in accordance with the control signal CDS.

The process of inserting the additional word data group DWS into the 8-bit word string data DU (8) in the data selecting / extracting section 12 is specifically, for example, as shown in FIG. Column data DU
Of the plurality of horizontal synchronization word data constituting the horizontal synchronization data group DHS arranged in the line blanking period of each line period of (8), a plurality of horizontal synchronization word data arranged immediately before the timing reference code SAV are plural. , Is replaced by the additional word data group DWS. Then, the timing of replacing the plurality of horizontal synchronization word data with the additional word data group DWS is set by the control signal CWD and the control signal CDS. As a result, from the data selection and extraction unit 12, the 8-bit word string data DZ (8) into which the additional word data group DWS is inserted during the line blanking period in each line period has a word transmission rate of 108 MB.
It is derived as ps.

The additional word data group DWS with a word transmission rate of 108 MBps from the word data transmitting unit 13 includes 8-bit word synchronization data DEK8 to which a predetermined code is given, 8-bit auxiliary word data DEA8, and the like. In one specific example, the 8-bit word synchronization data DEK8 is followed by 8-bit auxiliary word data DEA8, and furthermore, 2 bits.
The four-word configuration in which the RD inversion 8-bit word data DEX8 is formed in succession is repeated twice.

The 8-bit word synchronization data DEK8 is 1
When converted into 0-bit word data, it is 8-bit word data that becomes the above-described word data DS10. Therefore, when the 8-bit word synchronous data DEK8 is converted to 10-bit word data, it is called by a code name of K28.5, and the CRD, which is the RD of the word data arranged immediately before, is negative (-). When + K
When the CRD, which is the RD of the immediately preceding word data, is positive (+), −K2
8.5.

The 8-bit auxiliary word data DEA8
Is 8-bit word data represented as "01110101" as shown in FIG. 3. When converted into 10-bit word data, it is called by a code name of D21.3. D21.3 is “1010110 110” when the CRD which is the RD of the immediately preceding word data is negative (−) and the RD is neutral.
It is set to "0", and when the CRD which is the RD of the immediately preceding word data is positive (+), the value is set to "1010001111" where RD is neutral.

Further, the RD inversion 8-bit word data DEX8 becomes 1 when converted into 10-bit word data.
0-bit word data DXX. X and 10-bit word data DXX. X sets RD to positive (+) when the RD of the word data arranged immediately before is negative (-),
When the RD of the immediately preceding word data is positive (+), RD is made negative (-). That is, RD
The inversion 8-bit word data DEX8 is any 8-bit word data that satisfies the above condition.

Such an additional word data group DW
8-bit word string data DZ formed by inserting S
In (8), the portion where the additional word data group DWS is inserted is as shown in FIG. FIG.
In A, DD8 represents each 8-bit word data forming the 8-bit word string data DU (8) obtained from the signal multiplexing unit 10, and an arrow t represents an elapsed time.

Another specific example of the additional word data group DWS is that three 8-bit word synchronization data DEK8
A four-word configuration in which bit auxiliary word data DEA8 is formed twice is repeated twice. Two 8-bit word data DEX8 for RD inversion are connected to 8-bit word synchronization data DEK8. 8
Bit auxiliary word data DEA8 is subsequently formed 4
The word configuration is repeated twice. The 8-bit word synchronization data DEK8 contains RD inversion 8-bit word data DEX8, 8-bit auxiliary word data DEA8 and R
For example, a 4-word configuration in which 8-bit word data DEX8 for D inversion is successively formed is repeated twice. 8-bit word string data DZ formed by inserting these additional word data groups DWS
In (8), the portion where the additional word data group DWS is inserted is as shown in FIGS. 5A, 5B, and 5C, respectively. 5A to 5C, DD8 represents each 8-bit word data forming the 8-bit word string data DU (8) obtained from the signal multiplexing unit 10, and an arrow t represents elapsed time.

The 8-bit word string data DZ (8) formed in the data selection / extraction unit 12 and having the word transmission rate of 108 MBps and having the additional word data group DWS inserted therein is transmitted from the synchronous data insertion unit 11 , 8B / 10B conversion unit built-in P / S conversion unit 15.

P / S converter 15 with built-in 8B / 10B converter
, The 8-bit word string data DZ (8) is divided into 8 bits forming each word in the data,
Each of the divided 8-bit data is subjected to an 8B / 10B conversion for sequentially converting the 8-bit data into 10-bit data in accordance with a conversion table prepared in advance, thereby obtaining 8-bit word string data D.
A word transmission rate of 108 MBps based on Z (8)
To form the composite 10-bit word string data DZ (10). At this time, the 8-bit word synchronization data DEK
(8) is K28. 10-bit word synchronous data.
5 and the 8-bit auxiliary word data DEA (8)
Is converted to D21.3, and the RD conversion 8-bit word data DEX8 is converted to 10-bit word data DXX. X, and the 8-bit word data DD8 is converted to 10-bit word data DD10.

Therefore, 8-bit word string data DZ
Additional word data group DWS inserted in (8)
Is, for example, as shown in FIG. 4A, the composite 10-bit word string data DZ (10) has a portion based on the additional word data group DWS in which the portion based on the additional word data group DWS is located immediately before the first K28.5. When the RD of the 10-bit word data DD10 is negative (-), B in FIG.
, While the first K28.5
When the RD of the 10-bit word data DD10 immediately before is set to be positive (+), it is as shown in FIG. 4C. Therefore, in any case, + K28.5 is included in the portion based on the additional word data group DWS in the composite 10-bit word string data DZ (10).

Also, 8-bit word string data DZ (8)
, The additional word data group DWS inserted into the data string DZ is, for example, as shown in FIG. 5A, FIG. 5B or FIG.
As in the case where the additional word data group DWS inserted in (8) is as shown in FIG. In
+ K28.5 will be included.

In addition to the above, a P with a built-in 8B / 10B converter
/ S conversion section 15 outputs 8-bit word string data D
P / S conversion for converting parallel data into serial data is performed on the composite 10-bit word string data DZ (10) having a word transmission rate of 108 MBps obtained by the 8B / 10B conversion for Z (8). The serial data DZS having a bit transmission rate of 108 × 10 = 1.08 Gbps based on the bit word string data DZ (10) is obtained, and the serial data DZS is supplied to the transmission unit 16.

The transmitting unit 16 converts the serial data DZS into
For example, in order to transmit through a data transmission line formed using a coaxial cable or an optical fiber, an electric signal suitable for the data transmission line formed using a coaxial cable or an optical fiber is used. The signal is converted into a transmission signal SZ which is an optical signal suitable for the formed data transmission path and transmitted. Thereby, transmission of the serial data DZS is performed.

In the data transmission apparatus shown in FIG. 1 as described above, the P / S conversion section 1 with a built-in 8B / 10B conversion section
5 and the transmission unit 16 set the word transmission rate to 108 MBp
8B / 1 in the 8-bit word string data DZ (8) as s
Performs 0B conversion to increase the word transmission rate to 108 MBps
And the composite 10-bit word string data DZ (10) is obtained.
(10) is subjected to P / S conversion to convert the composite 10-bit word string data DZ (10) to a bit transmission rate of 1.08 Gb.
The data is converted into serial data DZS of ps and transmitted. Therefore, such a P / S converter 15 and a transmitter 16 having a built-in 8B / 10B converter can be provided, for example, in an integrated circuit (IC) provided for transmitting digital data under a fiber channel system or the like. It can be configured by effectively utilizing the elements. Therefore, 8-bit word string data including word synchronization data is formed based on the data to be transmitted, and the 8-bit word string data is converted into 10-bit word data based on the data to be transmitted by 8B / 10B conversion. Each of the three-channel D1 signals DVP1 to DVP3 is converted into 10-bit word string data including data and 10-bit word synchronization data, and further converted into serial data and transmitted to be transmitted. The bit addition data DAB (2) can be multiplex-transmitted by means that can be prepared relatively easily.

FIG. 6 shows an example of a data transmission method according to any one of the first to ninth aspects of the present invention. An example of the data transmission device according to the invention described in any one of Items 10 to 12 is shown.

In the example shown in FIG. 6, a three-channel D1 signal DVP which is a plurality of digital video signals
1, DVP2 and DVP3 and the bit addition signal 2
The bit addition data DAB (2) is supplied to the signal multiplexing unit 20. 3 channel D1 signals DVP1 to DVP3
Are digital signals forming 10-bit word string data in the form of a data sequence as shown in FIG. 15, for example, and are parallel data having a word transmission rate of, for example, 27 MBps. The 2-bit additional data DAB (2) is 2-bit word string data in which words of a 2-bit configuration are consecutive, and the word transmission rate is selected to be, for example, 27 MBps.

In the signal multiplexing section 20, the phases of the line periods in each of the three-channel D1 signals DVP1 to DVP3 are aligned, and the three-channel D1 signal DVP
VP1 to DVP3 and 2-bit additional data DAB
Under the condition that bit synchronization with (2) is taken, 3
A multiplexing process is performed on a combination of the channel D1 signals DVP1 to DVP3 and the 2-bit additional data DAB (2),
As a result, the three-channel D1 signals DVP1 to DVP
An 8-bit word string data DU (8) based on a combination of 3 and 2-bit additional data DAB (2) is obtained. In this case, each word (10 bits) in each of the three-channel D1 signals DVP1 to DVP3 and each word (2 bits) in the 2-bit additional data DAB (2), which are simultaneously supplied to the signal multiplexing unit 20, are used. Of 10 × 3 + 2 =
The 32 bits are sequentially divided into 4 words of 8 bits each, so that the word transmission rate is 27 MBps × 32
/ 8 = 108 MBps 8-bit word string data D
U (8) is formed.

The three-channel D1 signals DVP1 to DVP3 supplied to the signal multiplexing unit 20 have the same phase of the line period in each of them, so that the 8-bit word string data obtained as described above is obtained. DU
(8) has a line period, a field period, a frame period, and the like based on a line period, a field period, a frame period, and the like in each of the D1 signals DVP1 to DVP3.

The 8-bit word string data DU (8) obtained from the signal multiplexing section 20 is supplied to a synchronization data inserting section 21. The synchronous data insertion unit 21 has a three-channel D
The horizontal synchronization pulse signal SH and the vertical synchronization pulse signal SV in each of the one signal DVP1 to DVP3, and 3
The frequency synchronized with the word clock signal in each of the channel D1 signals DVP1 to DVP3 is 27 MHz.
Clock pulse signal CA and frequency 11
A clock pulse signal CB of 0.014 MHz is also supplied.

Then, in the synchronous data insertion unit 21, the 8-bit word string data DU from the signal multiplexing unit 20 is output.
(8) is supplied to the speed conversion / data insertion unit 22. The speed conversion / data insertion unit 22 includes a horizontal synchronization pulse signal S
H, a vertical synchronization pulse signal SV, a clock pulse signal CA having a frequency of 27 MHz, and a frequency of 110.0
A clock pulse signal CB of 14 MHz is also supplied,
Further, an additional word data group DWS having a word transmission rate of 110.014 MBps is also supplied from the word data transmission unit 23. The additional word data group DWS includes a plurality of 8-bit word data including 8-bit word synchronization data having a preset code.

The rate conversion / data insertion unit 22 changes the word transmission rate of, for example, from 108 MBps to 110.01 with respect to the 8-bit word string data DU (8) having a word transmission rate of 108 MBps.
At the same time as performing transmission rate conversion for converting to 4 MBps, an additional word data group DWS including 8-bit word synchronization data from the word data transmission unit 23 is inserted at a predetermined word interval, whereby the three-channel D1 Signals DVP1 to DVP3 and 2-bit additional data DA
Based on the combination with B (2), 8-bit word string data DZ (8) having a word transmission rate of, for example, 110.014 MBps is formed.

FIG. 7 shows a specific configuration example of the speed conversion / data insertion unit 22. In the example shown in FIG. 7, 8-bit word string data DU having a word transmission rate of 108 MBps obtained from signal multiplexing section 20 is used.
(8) is supplied to the switch 27. The switch 27
In accordance with the control signal CSA from the switch control signal forming unit 28, switching is performed every predetermined period, for example, every one line period in the 8-bit word string data DU (8).

The switch control signal forming section 28 is supplied with a horizontal synchronizing pulse signal SH, a vertical synchronizing pulse signal SV, and a clock pulse signal CB having a frequency of 110.014 MHz. Then, the switch control signal forming unit 2
8 forms the control signal CSA in synchronization with the line period in the 8-bit word string data DU (8) in accordance with the horizontal synchronizing pulse signal SH and the vertical synchronizing pulse signal SV. In response to the clock pulse signal CB, the control signal CSB is formed so as to be synchronized with a line period in the 8-bit word string data DU (8) and a period that is an integral multiple of the period of the clock pulse signal CB.

The switch 27 is connected to a memory section 29 and a memory section 30. Under such circumstances, the switch 27
Is 1 in the 8-bit word string data DU (8).
By switching every line period, the 8-bit word string data DU (8) is alternately supplied to the memory unit 29 and the memory unit 30 for one line period, and the 8-bit word string data DU (8) is changed. Memory unit 29 and memory unit 30
And supply to the distribution.

A memory control signal forming unit 31 is provided in association with the memory unit 29 and the memory unit 30.
The memory control signal forming unit 31 includes a clock pulse signal CA having a frequency of 27 MHz and a frequency of 110.014.
And a clock pulse signal CB of MHz.
Then, the memory control signal forming unit 31 sets the frequency to 27 MHz × 4 = 108 based on the clock pulse signal CA.
MHz and a frequency of 110.0 based on the clock pulse signal CB.
A read control signal QR having a frequency of 14 MHz is generated, and the write control signal QW and the read control signal QR are supplied to both the memory unit 29 and the memory unit 30.

As a result, in the memory section 29, the 8-bit word string data DU (8)
Is supplied, the 8-bit word string data D
U (8) is written in a state where the word transmission rate is 108 MBps according to the write control signal QW having the frequency of 108 MHz. Also, in the memory unit 30, the 8-bit word string data DU is transmitted through the switch 27.
In the period in which (8) is supplied, the 8-bit word string data DU (8) changes the word transmission rate to 108 MBp according to the write control signal QW having a frequency of 108 MHz.
s is written. Therefore, the writing in a state where the word transmission rate of the 8-bit word string data DU (8) in each of the memory unit 29 and the memory unit 30 is 108 MBps is performed by one line in the 8-bit word string data DU (8) of the switch 27. According to the switching for each period, it is performed alternately for one line period.

The 8-bit word string data DU (8) written in the memory unit 29 during one line period of the 8-bit word string data DU (8) is replaced with the 1-bit data of the next 8-bit word string data DU (8). During the line period, the word transmission rate is set to 110.014M according to the read control signal QR whose frequency is set to 110.014 MHz.
The data is read from the memory unit 29 as 8-bit word string data DZ ′ (8) of Bps and supplied to the switch 32. The memory unit 30 stores 8-bit word string data D
8 written in one line period in U (8)
The bit word string data DU (8) also has a word transmission rate of 110 in response to a read control signal QR having a frequency of 110.014 MHz in one line period of the next 8-bit word string data DU (8). .014MB
The data is read from the memory unit 30 as 8-bit word string data DZ ′ (8) of ps and supplied to the switch 32. The switch 32 is also supplied with an additional word data group DWS having a word transmission rate of 110.014 MBps from the word data transmission unit 23.

The switch 32 adjusts the word transmission rate from the word data transmitting section 23 to 110.014 MBp in response to the control signal CSB from the switch control signal forming section 28.
s additional word data group DWS, memory unit 3
The word transmission rate read from 0 is 110.014
Each of 8-bit word string data DZ ′ (8) with MBps and 8-bit word string data DZ ′ (8) with a word transmission rate of 110.014 MBps read from the memory unit 29 is stored in a predetermined word. Retrieve sequentially for each period. Thereby, the switch 32 adds an additional word data group having a word transmission rate of 110.014 MBps to the 8-bit word string data DZ '(8) having a word transmission rate of 110.014 MBps at a predetermined word interval. 8 formed by inserting DWS
Bit word string data DZ (8) is derived.

The additional word data group DWS having a word transmission rate of 110.014 MBps from the word data transmission unit 23 includes 8-bit word synchronization data DEK8 and 8-bit auxiliary word data DEA8 to which a predetermined code is given. , But in one specific example, the 8-bit word synchronization data DEK8
Is repeated twice, and an arbitrary number of RD inversion 8-bit word data are successively formed.

The 8-bit word synchronization data DEK8, 8-bit auxiliary word data DEA8, and 8-bit word data for RD inversion constitute an additional word data group DWS transmitted from the word data transmission unit 13 in the example shown in FIG. It is similar to the one. That is, the 8-bit word synchronous data DEK8 becomes the above-mentioned word data DS10 when converted into 10-bit word data, and the 8-bit auxiliary word data DEA8 is converted into a 10-bit word data with a code name of D21.3. When the RD inversion 8-bit word data DEX8 is converted into 10-bit word data, the 10-bit word data DXX. X and 10-bit word data DXX. X indicates that RD is positive (+) when the RD of the immediately preceding word data is negative (-).
When the RD of the immediately preceding word data is positive (+), RD is negative (-).

Such an additional word data group DW
8-bit word string data DZ formed by inserting S
In (8), the portion where the additional word data group DWS is inserted is as shown in FIG. 8A. FIG.
In A, DD8 represents each 8-bit word data forming 8-bit word string data DZ '(8) obtained from each of the memory units 29 and 30, and an arrow t.
Represents the elapsed time.

The 8-bit word string data DZ (8) having a word transmission rate of 110.014 MBps formed by the speed conversion / data insertion unit 22 is transmitted from the synchronous data insertion unit 21 and is converted to an 8B / 10B conversion unit. Built-in P
/ S conversion unit 24.

P / S converter 24 with built-in 8B / 10B converter
, The 8-bit word string data DZ (8) is divided into 8 bits forming each word in the data,
Each of the divided 8-bit data is subjected to an 8B / 10B conversion for sequentially converting the 8-bit data into 10-bit data in accordance with a conversion table prepared in advance, thereby obtaining 8-bit word string data D.
A word transmission rate of 110.14 based on Z (8)
Composite 10-bit word string data DZ (1
0) is formed. At this time, the 8-bit word synchronization data D
EK8 is 10-bit word synchronous data K28.
5 and the 8-bit auxiliary word data DEA8 is
21.3, and RD inversion 8-bit word data DEX8 is converted to 10-bit word data DXX. X, and the 8-bit word data DD8 is converted to 10-bit word data DD10.

Therefore, 8-bit word string data DZ
Additional word data group DWS inserted in (8)
Is, for example, as shown in FIG. 8A, the composite 10-bit word string data DZ (10) has a portion based on the additional word data group DWS in which the portion based on the additional word data group DWS is located just before the first K28.5. When the RD of the 10-bit word data DD10 is negative (-), it is as shown in FIG. 8B, while the first K2
When the RD of the 10-bit word data DD10 immediately before 8.5 is positive (+), it is as shown in FIG. 8C. Therefore, in any case, + K2 is added to the portion based on the additional word data group DWS in the composite 10-bit word string data DZ (10).
8.5 would be included.

In addition to the above, a P with a built-in 8B / 10B converter
In the / S converter 24, the 8-bit word string data D
Compound 1 with word transmission rate of 110.014 MBps obtained by 8B / 10B conversion on Z (8)
P / S conversion for converting parallel data into serial data is performed on the 0-bit word string data DZ (10), and the bit transmission rate based on the composite 10-bit word string data DZ (10) is set to 110.014 × 10４. 1.1Gbp
The serial data DZS to be set as s is obtained, and the serial data DZS is supplied to the transmission unit 25.

The transmitting section 25 converts the serial data DZS into
For example, in order to transmit through a data transmission line formed using a coaxial cable or an optical fiber, an electric signal suitable for the data transmission line formed using a coaxial cable or an optical fiber is used. The signal is converted into a transmission signal SZ which is an optical signal suitable for the formed data transmission path and transmitted. Thereby, transmission of the serial data DZS is performed.

In the data transmission apparatus shown in FIG. 6 as described above, the P / S converter 2 with a built-in 8B / 10B converter is used.
4 and the transmission unit 25 set the word transmission rate to 110.01.
The 8-bit word string data DZ (8) having 4 MBps is subjected to 8B / 10B conversion to reduce the word transmission rate to 11 MBps.
The composite 10-bit word string data DZ (10) having 0.014 MBps is obtained, and the composite 10-bit word string data DZ (10) is subjected to P / S conversion to obtain composite 1
The 0-bit word string data DZ (10) is converted into serial data DZS having a bit transmission rate of 1.1 Gbps and transmitted. Therefore, such 8B /
The P / S converter 24 with built-in 10B converter and the transmitter 25
For example, it can be configured by effectively utilizing an integrated circuit (IC) element provided for transmitting digital data under a fiber channel system or the like. Therefore, even in the data transmission apparatus shown in FIG. 6, 8-bit word string data including word synchronization data is formed based on the data to be transmitted, and the 8-bit word string data is converted to 8B / 10B data. , 10-bit word data based on the data to be transmitted and 1
Each of the three-channel D1 signals DVP1 to DVP3 is converted into 10-bit word string data including 0-bit word synchronization data and further converted into serial data and transmitted to be transmitted. The additional data DAB (2) can be multiplex-transmitted by means that can be prepared relatively easily.

FIG. 9 shows a data transmission apparatus shown in FIG. 1 according to an example of the data transmission method according to the invention described in any one of claims 1 and 3 to 9 of the present application. , The 8-bit word string data DZ (8) transmitted from the transmitting unit 16 is 8B / 10
1 shows an example of a data receiving apparatus that receives a transmission signal SZ based on serial data DZS obtained by performing B conversion and P / S conversion.

In the example of the data receiving apparatus shown in FIG. 9, for example, an electric signal suitable for a data transmission line formed by using a coaxial cable or an optical fiber formed by using an optical fiber is used. A receiving unit 40 is provided for receiving a transmission signal SZ, which is an optical signal suitable for the data transmission path. When receiving the transmission signal SZ, the receiving unit 40 reproduces the serial data DZS based on the received transmission signal SZ, and detects it by synchronizing data detection / S
/ P conversion / 10B / 8B conversion unit 41.

Synchronous data detection, S / P conversion, 10B / 8
In the B converter 41, + K28.5 which is 10-bit word synchronous data in the serial data DZS is used.
(Or -K28.5) is converted into serial data, the part is detected as synchronous data, and word synchronization is performed based on the detected synchronous data to obtain serial data DZ.
S is subjected to S / P conversion processing, and for example, the word transmission rate as shown in A or C of FIG.
Form composite 10-bit word string data DZ (10), which is parallel data of 108 MBps. The composite 10-bit word string data DZ (10) shown in A or C of FIG.
It is selectively formed according to D.

Synchronous data detection, S / P conversion, 10
The B / 8B conversion unit 41 divides the composite 10-bit word string data DZ (10) into 10 bits at a time and converts each of the divided 10 bits into an 8-bit data according to a conversion table prepared in advance. 8-bit word string data DZ having a word transmission rate of 108 MBps based on the 8-bit data sequentially obtained by performing 10B / 8B conversion for sequentially converting the data into data.
(8) is reproduced. The 8-bit word string data D having a word transmission rate of 108 MBps obtained from the synchronous data detection / S / P conversion / 10B / 8B conversion unit 41
Z (8) is supplied to the data separation unit 42.

Further, synchronous data detection, S / P conversion, 1
The 0B / 8B converter 41 detects + K28.5 and -K28.5 in the additional word data group DWS in the composite 10-bit word string data DZ (10), and outputs the K28.5 detection output signal SWS as a control signal. Forming part 4
3 This K28.5 detection output signal SWS is
According to the contents of the additional word data group DWS in the composite 10-bit word string data DZ (10), for example, it is obtained as shown in B or D in FIG.

In control signal forming section 43, K28.
A synchronization control signal CW based on the 5-detection output signal SWS is formed. Then, the synchronization control signal CW obtained from the control signal forming unit 43 is supplied to the data separation unit 42.

In data separation section 42, synchronization control signal CW obtained from control signal formation section 43 is used,
The additional word data group DWS is separated from the 8-bit word string data DZ (8), and the word transmission rate based on the 8-bit word string data DZ (8) is set to 108M.
The 8-bit word string data DU (8) having Bps and the additional word data group DWS are obtained by being separated from each other. Then, the additional word data group DWS and the word transmission rate are set to 108 MBp from the data separation unit 42.
The 8-bit word string data DU (8) as s is transmitted.

The 8-bit word string data DU (8) obtained from the data separation section 42 is supplied to a signal separation section 44. In the signal separation unit 44, the word transmission rate is set to 1
8-bit word string data DU (8) with 08 MBps
Are formed into three groups of 10 bits and 2 bits, and a state in which each of the three groups of 10 bits and 2 bits is individually derived continues. . As a result, based on the 8-bit word string data DU (8), three-channel parallel data each forming 10-bit word string data having a word transmission rate of 108/4 = 27 MBps, and a word transmission rate of 108 / D of three channels, which is 2-bit word string data with 4 = 27 MBps
One signal DVP1, DVP2 and DVP3 and bit addition signal DAB (2) are formed separately from each other. Accordingly, the reproduced D1 signals DVP1 to DVP3 of three channels and the bit addition signal DA are output from the signal separation unit 44.
B (2) is derived.

In this manner, the three-channel D1 signal DVP1 each having a word transmission rate of 27 MBps
.. DVP3 and the bit addition signal DAB (2) are reproduced.

FIG. 11 shows an example of a data transmission method according to one of the first to ninth aspects of the present invention. Shows an example of a data receiving apparatus that receives a transmission signal SZ based on serial data DZS obtained by performing 8-B / 10B conversion and P / S conversion on 8-bit word string data DZ (8) transmitted from the CDMA system. .

In the example of the data receiving apparatus shown in FIG. 11, for example, an electric signal suitable for a data transmission path formed by using a coaxial cable or an optical fiber formed by using an optical fiber is used. A receiving unit 50 is provided for receiving a transmission signal SZ which is an optical signal suitable for the data transmission path. The receiving unit 50 transmits the transmission signal SZ
, The serial data DZS based on the received transmission signal SZ is reproduced, and the reproduced
It is supplied to the S / P converter / 10B / 8B converter 51.

Synchronous data detection, S / P conversion, 10B / 8
In the B converter 51, + K28.5 which is 10-bit word synchronous data in the serial data DZS is used.
(Or -K28.5) is converted into serial data, the part is detected as synchronous data, and word synchronization is performed based on the detected synchronous data to obtain serial data DZ.
S is subjected to S / P conversion processing, and for example, a word transmission rate as shown in A or C of FIG.
The composite 10-bit word string data DZ (10), which is parallel data of 110.14 MBps, is formed.
The composite 10-bit word string data DZ (10) shown in A or C of FIG.
It is selectively formed according to the contents of WS and the RD of 10-bit word data immediately before the first K28.5 in the additional word data group DWS.

Synchronous data detection, S / P conversion, 10
The B / 8B conversion section 51 divides each of the 10 bits into the composite 10-bit word string data DZ (10), and converts each of the divided 10 bits into an 8-bit data according to a conversion table prepared in advance. 10B / 8B conversion is performed sequentially to convert the data, and 8-bit word string data DZ (8) with a word transmission rate of 110.014 MBps is reproduced based on the sequentially obtained 8-bit data. Then, synchronous data detection S
The 8-bit word string data DZ (8) having a word transmission rate of 110.014 MBps obtained from the / P conversion / 10B / 8B conversion unit 51 is converted into the data separation / speed conversion unit 5
2 is supplied.

Further, synchronous data detection, S / P conversion, 1
The 0B / 8B converter 51 detects + K28.5 and -K28.5 in the additional word data group DWS in the composite 10-bit word string data DZ (10), and outputs the K28.5 detection output signal SWS as a control signal. Forming part 5
3 This K28.5 detection output signal SWS is
According to the contents of the additional word data group DWS in the composite 10-bit word string data DZ (10), for example, it is obtained as shown in B or D in FIG.

In control signal forming section 53, K28.
A synchronization control signal CW based on the 5-detection output signal SWS is formed. Then, the synchronization control signal CW obtained from the control signal forming unit 53 is supplied to the data separation / speed conversion unit 52.

In the data separation / speed conversion section 52,
The additional word data group DWS is separated from the 8-bit word string data DZ (8) by using the synchronization control signal CW obtained from the control signal forming unit 53, and is based on the 8-bit word string data DZ (8). 8-bit word string data DU (8) having a word transmission rate of 110.014 MBps and an additional word data group DWS are:
Obtained separated from each other. Further, in the data separation / speed conversion unit 52, the word transmission rate is set to 110.014 MBps by converting the word transmission rate to 110.14 MBps.
A transmission rate conversion from MBps to 108 MBps is performed, and 8-bit word string data DU (8) having a word transmission rate of 108 MBps is formed. As a result, the data separation / speed conversion unit 52 sends the additional word data group DWS and the word transmission rate to 108 MBp.
The 8-bit word string data DU (8) as s is transmitted.

The 8-bit word string data DU (8) obtained from the data separation / speed conversion section 52 is
Supplied to In the signal separating section 54, 32 bits forming continuous 4 words of the 8-bit word string data DU (8) having a word transmission rate of 108 MBps are divided into three groups of 10 bits and 2 bits. The state where each of the three groups of 10 bits and 2 bits is individually derived is continued. As a result, based on the 8-bit word string data DU (8), three-channel parallel data each forming 10-bit word string data having a word transmission rate of 108/4 = 27 MBps, and a word transmission rate of 108 / 4 =
2-bit word string data of 27 MBps
3 channel D1 signals DVP1, DVP2 and DVP
3 and the bit addition signal DAB (2) are formed separately from each other. Thereby, the reproduced three-channel D1 signals DVP1 to DVP3 and the bit addition signal DAB (2) are derived from the signal separation unit 54.

Thus, the D1 signal DVP1 of three channels each having a word transmission rate of 27 MBps
.. DVP3 and the bit addition signal DAB (2) are reproduced.

In the example of the data transmission method implemented by using the data transmission apparatus shown in FIG. 1 or FIG. 6, the digital video signal supplied to the signal multiplexing unit 10 or 20, ie, The digital video signal to be transmitted is a three-channel D1 signal and is combined with the bit addition signal DAB (2). However, the data transmission method according to any one of claims 1 to 9 in the claims of the present application and the data transmission method according to any of claims 10 to 12 in the claims of the present application In the data transmission device according to the described invention, the digital video signal to be transmitted need not be limited to the D1 signal, but may be a digital video signal other than the D1 signal such as the D2 signal or the SDTI signal. Also, the combination with the bit addition signal such as the bit addition signal DAB (2) is not always necessary. Further, the number of channels of the digital video signal to be transmitted is not limited to three, but can be any number.

[0095]

As is clear from the above description, in the data transmission method according to any one of the first to ninth aspects of the present invention, for example, The word string data into which an additional word data group is inserted based on a plurality of digital video signals such as a D1 signal, a D2 signal, an SDTI signal, or a combination of a plurality of digital video signals and bit addition signals is 8B / When the data is transmitted after being subjected to the 8B / 10B conversion and the P / S conversion by the P / S conversion means incorporating the 10B conversion means, the P / S conversion means incorporating the 8B / 10B conversion means performs the 8B / 10B conversion. The compound word string data obtained and converted into serial data includes word synchronization data having a predetermined positive or negative RD. It will be.

The word synchronization data in the compound word string data which is converted into serial data and transmitted is received by the receiving side receiving the serial data based on the compound word string data including the word synchronization data detection and RD. Regardless of whether the detection is performed by detecting only word synchronization data that is positive or only by detecting word synchronization data that has negative RD, a plurality of digital video It is assumed that it is properly detected as word synchronization data required for processing for reproducing a signal or a plurality of digital video signals and bit addition signals. The word string data included in the compound word string data is
Being obtained through an 8B / 10B conversion, a 10-bit word with the selected content is used and formed, resulting in good transmission quality.
Therefore, on the receiving side, reproduction of a plurality of digital video signals or a plurality of digital video signals and a bit addition signal based on the received composite word string data is performed under the condition that good transmission quality is obtained. A state in which the data synchronization state required for the processing for the purpose can be reliably obtained.

According to the data transmission method according to any one of the first to ninth aspects of the present invention, the word string data into which the additional word data group is inserted 8B / 10 against
B-conversion, conversion of composite word string data obtained into serial data, transmission of the converted serial data, reception of serial data on the receiving side, composite bit word string of received serial data Conversion to data, such as Fiber Channel
This can be done using integrated circuit devices used for transmitting and receiving digital video signals under the system. Therefore, word string data including word synchronization data is formed based on the data to be transmitted,
The word string data is subjected to 8B / 10B conversion, converted into serial data, and transmitted to be transmitted. For example, a plurality of D1 signals, D2 signals, SDTI signals, and the like are transmitted. Can be transmitted by means that can be prepared relatively easily.

Further, in the data transmission apparatus according to any one of the tenth to twelfth aspects of the present invention, for example, a plurality of D1
8B / 10B to word string data into which an additional word data group is inserted based on a plurality of digital video signals such as a signal, a D2 signal, an SDTI signal, or a combination of a plurality of digital video signals and bit addition signals.
8B / 10B by P / S converter with built-in converter
A word having a predetermined positive or negative RD is included in the composite word string data which is formed by the conversion, is converted into serial data by the P / S conversion means having the built-in 8B / 10B conversion means, and is transmitted. Synchronous data will be included.

The word synchronizing data in the compound word string data transmitted as serial data is received by the receiving side receiving the serial data based on the compound word string data including the word synchronizing data detection and RD. In the case where the detection is performed by detecting only the word synchronization data to be used, or the case where the detection is performed only by detecting the word synchronization data in which the RD is negative, a plurality of digital video signals Alternatively, it is to be properly detected as word synchronization data required for processing for reproducing a plurality of digital video signals and bit addition signals. The word string data included in the compound word string data is
Being obtained through an 8B / 10B conversion, a 10-bit word with the selected content is used and formed, resulting in good transmission quality.
Therefore, on the receiving side, reproduction of a plurality of digital video signals or a plurality of digital video signals and a bit addition signal based on the received composite word string data is performed under the condition that good transmission quality is obtained. A state in which the data synchronization state required for the processing for the purpose can be reliably obtained.

According to the data transmission apparatus according to any one of the tenth to twelfth aspects of the present invention, the data transmission apparatus is capable of transmitting 8B to the word string data into which the additional word data group is inserted. / 10B
Conversion, conversion of the composite word string data obtained into serial data, and transmission of the converted serial data, and further, reception of the serial data on the receiving side, and composite bit word string data of the received serial data The conversion can be performed using, for example, an integrated circuit device used for transmitting and receiving a digital video signal under a fiber channel system. Therefore, word string data including word synchronization data is formed based on the data to be transmitted, and the word string data is subjected to 8B / 10B conversion and converted to serial data for transmission. With this transmission method, for example, a plurality of digital video signals, such as a plurality of D1 signals, D2 signals, and SDTI signals, can be transmitted by means that can be prepared relatively easily.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a data transmission method according to the invention described in claim 1 and claims 3 to 9 in the claims of the present application. FIG. 14 is a block diagram showing an example of a data transmission device according to the invention described in claim 10 or 12.

FIG. 2 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 and 3 to 9 in the claims of the present application.

FIG. 3 is a view for explaining 8-bit auxiliary word data used in an example of the data transmission method according to the invention according to any one of claims 1 and 3 to 9 in the claims of the present application; FIG.

FIG. 4 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 and 3 to 9 in the claims of the present application.

FIG. 5 is a time chart for explaining an example of the data transmission method according to the invention described in any one of claims 1 and 3 to 9 in the claims of the present application.

FIG. 6 is a block diagram illustrating a data transmission method according to an embodiment of the present invention; FIG. 13 is a block diagram showing an example of a data transmission device according to the invention as set forth in claim 12.

7 is a block diagram showing a specific configuration example of a rate conversion / data insertion unit in the data transmission device shown in FIG. 6;

FIG. 8 is a time chart for explaining one example of a data transmission method according to the invention described in any one of claims 1 to 9 in the claims of the present application.

FIG. 9 is a data receiving apparatus for receiving a transmission signal transmitted according to one example of the data transmission method according to the invention described in claim 1 and claims 3 to 9 of the present application. FIG. 3 is a block diagram showing an example of the configuration.

FIG. 10 is a time chart used for describing the operation of the data receiving apparatus shown in FIG. 9;

FIG. 11 shows an example of a data receiving apparatus for receiving a transmission signal transmitted according to an example of the data transmission method according to any one of claims 1 to 9 in the claims of the present application. It is a block diagram.

FIG. 12 is a time chart for explaining the operation of the data receiving apparatus shown in FIG. 11;

FIG. 13 is a conceptual diagram explaining a “frame” used in transmitting digital data.

FIG. 14 is a conceptual diagram serving to explain word synchronization data used in transmitting digital data.

FIG. 15 is a conceptual diagram explaining an example of a data format of a digital video signal.

[Explanation of symbols]

10, 20 ... signal multiplexing unit, 11, 21 ... synchronous data insertion unit, 12 ... data selection and extraction unit, 1
3, 23 ... word data sending section, 14, control signal forming section, 15, 24 ... 8B / 10B conversion section built-in P
/ S conversion unit, 16, 25 ... transmission unit, 22 ...
Speed conversion / data insertion unit, 27, 32 ... switch, 28 ... switch control signal forming unit, 29, 3
0: memory unit, 31: memory control signal forming unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04J 3/06 H04L 25/49 A 5K029 H04L 29/06 H04N 7/13 Z 5K034 25/49 H04L 13/00 305B H04N 7/08 H04N 7/08 Z 7/081 F term (reference) 5B014 EB01 GA24 GA55 5B077 AA04 FF11 NN02 5C059 KK00 MA00 PP04 RB02 RB10 RB16 RC02 RD03 RE02 SS06 UA02 UA05 UA28 UA35 CA20 AB03 CA01 AB03 DA01 DA05 DA13 5K028 AA06 EE03 KK05 MM16 NN59 RR03 5K029 AA18 CC04 EE06 EE18 EE19 5K034 AA10 CC02 DD01 FF02 HH05 HH16 HH61 KK12 LL07 MM08 PP05

Claims (12)

[Claims] A multiplexing process is performed on a plurality of digital video signals or a combination of a plurality of digital video signals and bit addition signals, and a combination of the plurality of digital video signals or a plurality of digital video signals and bit addition signals is provided. And obtains word string data based on
At an interval of a predetermined word, an additional word data group including word synchronization data having a preset code is inserted, and then, using a parallel / serial conversion means having a built-in 8-bit / 10-bit conversion means, The word string data into which the additional word data group is inserted is subjected to 8-bit / 10-bit conversion, and the running disparity obtained based on the word synchronization data is converted to positive or negative after 8-bit / 10-bit conversion. Forming compound word string data having a part based on the additional word data group including word synchronization data, further converting the compound word string data into serial data, and transmitting the serial data for transmission Data transmission method. 2. A method according to claim 1, wherein when adding an additional word data group to word string data based on a combination of a plurality of digital video signals or a plurality of digital video signals and bit addition signals, the word string data is subjected to transmission rate conversion. 2. The data transmission method according to claim 1, wherein: 3. Each of a plurality of digital video signals is
3. The data transmission method according to claim 1, wherein the signal is in the form of bit word string data. 4. A combination of a plurality of digital video signals and a bit addition signal is formed by a digital video signal having a data format of 3-channel 10-bit word string data and 2-bit additional data. Item 3. The data transmission method according to Item 3. 5. Word string data based on a plurality of digital video signals or a combination of a plurality of digital video signals and bit addition signals is defined as 8-bit word string data, and the additional word data group includes 8-bit word synchronization data. 5. The data transmission method according to claim 4, wherein the compound word string data is compound 10-bit word string data. 6. The additional word data group is characterized in that a portion based on the additional word data group in the composite word string data includes word synchronous data after 8 bit / 10 bit conversion with positive running disparity. The data transmission method according to any one of claims 1 to 5, wherein the data transmission method is selected. 7. A part based on the additional word data group in the composite word string data, wherein the additional word data group includes word synchronous data after 8-bit / 10-bit conversion with negative running disparity. The data transmission method according to any one of claims 1 to 5, wherein the data transmission method is selected. 8. The method according to claim 1, wherein the additional word data group includes auxiliary word data, and the auxiliary word data is selected such that the running disparity is neutral after 8 bits / 10 bits conversion. The data transmission method according to any one of claims 1 to 7. 9. The data transmission method according to claim 8, wherein the additional word data group is selected such that a portion including word synchronization data and auxiliary word data is repeated at least twice. 10. A multiplexing process for a plurality of digital video signals or a combination of a plurality of digital video signals and bit addition signals, and a combination of the plurality of digital video signals or a plurality of digital video signals and bit addition signals. Signal multiplexing means for obtaining word string data based on the following. An additional word data group including word synchronization data having a preset code is provided at predetermined word intervals in the word string data obtained from the signal multiplexing means. The synchronous data inserting means to be inserted, and the word string data into which the additional word data group obtained from the synchronous data inserting means has been inserted, have 8 bits / byte.
A portion based on the additional word data group, which includes 10-bit converted word-synchronous data that has undergone 8-bit / 10-bit conversion with positive or negative running disparity obtained based on the word-synchronous data. A parallel / serial conversion means for forming the compound word string data and further converting the compound word string data into serial data, the parallel / serial conversion means having a built-in 8-bit / 10-bit conversion means; Built-in parallel /
A transmission means for transmitting serial data obtained from the serial conversion means for transmission. 11. The communication system according to claim 10, wherein said synchronous data insertion means performs transmission rate conversion on said word string data when inserting the additional word data group into the word string data obtained from the signal multiplexing means. Data transmission device. 12. A signal multiplexing means for multiplexing a combination of a digital video signal having a data format of 3-channel 10-bit word string data and 2-bit additional data to obtain 8-bit word string data. Wherein the synchronization data insertion means inserts an additional word data group including 8-bit word synchronization data into the 8-bit word string data obtained from the signal multiplexing means;
Parallel / serial conversion means incorporating 8-bit / 10-bit conversion means performs 8-bit / 10-bit conversion on the 8-bit word string data into which the additional word data group obtained from the synchronization data insertion means is inserted, A composite having a portion based on the additional word data group, including word synchronization data after 8 bit / 10 bit conversion in which the running disparity obtained based on the word synchronization data is predetermined positive or negative. 12. The data transmission apparatus according to claim 10, wherein the data transmission apparatus forms 10-bit word string data, and further converts the composite 10-bit word string data into serial data.