JP2001156860A - Method and device for data transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To multiplex multiple MPEG picture information data by relatively easily prepared means so that they can be surely reproduced on the reception side and also perform 8B/10B conversion to transmit them. SOLUTION: Individual prescribed period divisions of the multiple MPEG picture information data are written in multiple memory means, and period divisions written in the multiple memory means are sequentially read out as 8-bit word string data, and the read plural 8-bit word string data and an additional word data group including specific word synchronizing data are synthesized to generate compound 8-bit word string data where the additional word data group is inserted at intervals of a prescribed number of words, and this data is subjected to 8 bits/10 bits conversion processing to generate compound 10-bit word string data including 10-bit word synchronizing data where running disparity is preliminarily determined as resistive on negative, and this generated data is converted to serial data and is transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention described in the claims of the present application relates to an additional word data group including a plurality of data compressed digital video signal data or video and audio signal data and word synchronization data. To obtain 8-bit word string data, convert the obtained 8-bit word string data into 10-bit word string data including word synchronization data, and transmit the 10-bit word string data for transmission. The present invention relates to a transmission method and a data transmission device provided for implementing the method.

[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 on the transmission side into, for example, 8 bits / 10 bits (8B / 8 bits) where every 8 bits is converted to 10 bits.
10B conversion) to obtain 10-bit word string data. And what is actually transmitted is 8B / 10B
The 10-bit word string data formed by the conversion is converted into serial data obtained by further performing a parallel / serial conversion (P / S conversion) process.

[0004] On the receiving side, serial / parallel conversion (S / P conversion) is performed on the received serial data.
The processing is performed to form 10-bit word string data,
The 10-bit / 8-bit conversion (1
0B / 8B conversion). The original digital data is reproduced from the word string data formed by performing the 10B / 8B conversion in this manner.

[0005] As described above, data transmission in which digital data to be transmitted is subjected to 8B / 10B conversion is recognized as providing good transmission quality.

Further, digital data transmitted as 10-bit word string data under a digital data transmission system such as a fiber channel system is called a "frame" as shown in FIG. 20, for example. It follows the data format in which the smallest independent packet is formed. The "frame" shown in FIG. 20 has a total 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 states of the respective numbers of “1” and “0”, for example, running disparity (Running Disparity)
: RD), the running disparity (RD) is said to be positive when the number of “1” is larger than the number of “0”, and when the number of “0” is “1”. Is greater than the number of "", RD is said to be negative, and when the number of "1" is equal to the number of "0", the RD is 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, 10-bit word string data is transmitted on the receiving side.
In the 10B / 8B conversion performed on the bit word string data, it is necessary to accurately grasp each word data having a 10-bit configuration. Therefore, the 10-bit word string data transmitted as serial data is transmitted on the transmission side. , Word synchronization data is appropriately inserted. 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, the RD is made positive when the immediately preceding word data makes the RD negative, and the word synchronization data is obtained when the immediately preceding word data makes the RD positive. At some point, RD is made negative.

Such word synchronization data is, for example,
This is 10-bit word data DS10 called by a code name of K28.5. FIG. 21 shows a 10-bit word data D called by a code name of K28.5.
S10, and the 10-bit word data DS10
Is "001" when the CRD, which is the 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 (+), the RD is made negative," 110000 0101 "(hereinafter," 001111 1010 "is replaced by + K28). .5
And "110000 0101" is -K2
8.5).

On the other hand, digital data representing image information, that is, 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 data compression be performed so that the data amount can be reduced without lowering. Therefore, various researches and developments have been made on data compression technology for reducing the amount of image information data. One of the results is digital data representing image information, especially moving image information. As a method for implementing the data compression of image information data, which has been studied by the Moving Picture Experts Group (MPEG), a working group under the technical committee under the international standardization organization, and approved as a standard. Also, a standard method called MPEG has been proposed.

In the standard method called MPEG, image information data is subjected to data compression by high-efficiency coding.
When data compression by high-efficiency encoding according to EG is performed, data compression with an extremely high compression rate can be realized.
In addition, there is an advantage that an image reproduced based on the image information data subjected to the data compression can be of high quality. Therefore, in the field of business or home electronic devices such as digital video cameras and digital video tape recorders, image information data (hereinafter referred to as MPEG image information data) that has been subjected to data compression by high-efficiency encoding according to MPEG. ) That tend to increase.

In the transmission of such MPEG image information data, as described above, on the transmission side, 8-bit word string data including word synchronization data is formed based on the data to be transmitted, and the 8-bit word The transmission method in which the column data is converted into 10-bit word sequence data by 8B / 10B conversion and transmitted is performed. This is desirable from the viewpoint of effective use of.

[0014]

As described above, on the transmission side, 8-bit word string data including word synchronization data is formed based on data to be transmitted, and the 8-bit word string data is 8B / 10B. 10 by conversion
Since it is desired to transmit MPEG image information data using a transmission method that is converted into bit word string data and transmitted, not only a single MPEG image information data but also a plurality of MPEG image information data are multiplexed. If the MPEG image information data can be transmitted, the MPEG image information data can be used efficiently, and the range of use of the MPEG image information data can be expanded. And MPE
Efficient use of G image information data or MPEG
The expansion of the use range of the image information data, for example, leads to further development of technology in the field of business or home electronic devices.

However, conventionally, on the transmission side, 8-bit word string data including word synchronization data is formed based on data to be transmitted, and the 8-bit word string data is converted by 8B / 10B conversion. 10
There is no specific example that realizes a transmission system capable of multiplexing and transmitting a plurality of MPEG image information data by using a transmission method that is converted into bit word string data and transmitted. Further, there is no document describing a technique relating to a transmission system capable of multiplexing and transmitting such a plurality of MPEG image information data.

In view of the above, according to the invention described in the claims of the present application, 8-bit word string data including word synchronization data is formed based on data to be transmitted, and the 8-bit word string data is generated. The data includes 10-bit word data and 10-bit word synchronization data based on the data to be transmitted by the 8B / 10B conversion.
The data is converted into bit word string data, and the 10 bit word string data is transmitted to be transmitted, for example, into a plurality of MPEG image information data.
Provided are a transmission method capable of multiplexing and transmitting a plurality of digital video signal data or video and audio signal data subjected to data compression, and a data transmission device provided for the implementation.

[0017]

The data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application is such that each of them is subjected to data compression. For each of a plurality of digital video signal data or video and audio signal data, each predetermined period segment is written into a plurality of memory means,
The period divisions written in each of the plurality of memory means are sequentially read as 8-bit word string data, and a plurality of 8-bit word string data respectively read from the plurality of memory means and 8-bit word data having a preset code Is combined with the additional word data group containing the specified word synchronization data to form composite 8-bit word string data into which the additional word data group is inserted at predetermined word intervals, and the composite 8-bit word 10-bit word synchronization data having a predetermined positive or negative RD, which is obtained based on the specific word synchronization data by subjecting the column data to 8B / 10B conversion processing,
Composite 1 having part based on additional word data group
It forms 0-bit word string data, converts the composite 10-bit word string data into serial data, and sends out the serial data for transmission.

In particular, in the data transmission method according to the second or third aspect of the present invention, each of the data to be obtained based on the data is subjected to data compression. A plurality of digital video signal data or video and audio signal data are converted into a plurality of MPEG image information data or data equivalent thereto.

A data transmission apparatus according to a ninth aspect of the present invention provides a plurality of digital video signal data or video and audio signals each of which has been subjected to data compression. For the data, each predetermined period division is written to a plurality of memory means, and the period divisions written to each of the plurality of memory means are sequentially read as 8-bit word string data. And the additional word data group including the specific word synchronization data converted into the 8-bit word data having a preset code, and the additional word data group is spaced at a predetermined word interval. 8 bit word string data forming means for forming composite 8 bit word string data into which is inserted If, 8B the composite 8-bit word sequence data obtained from 8-bit word sequence data forming means /
A composite 10-bit having a portion based on an additional word data group, including a 10-bit word synchronization data having a predetermined positive or negative RD obtained by performing a 10B conversion process and based on the specific word synchronization data 8B / 10B conversion means for forming word string data;
Data transmitting means for converting composite 10-bit word string data obtained from the 10B converting means into serial data and transmitting the serial data for transmission.

In the data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application as described above, for example, claim 2
Or a plurality of digital video signal data or video, each of which has been subjected to data compression, which is a plurality of MPEG image information data or data equivalent thereto as in the data transmission method according to the invention described in 3. For the audio signal data, word string data obtained by writing to and reading from a plurality of memory means and an additional word data group including specific word synchronization data are synthesized. The obtained composite 8-bit word string data is formed by performing 8B / 10B conversion processing on the obtained composite 8-bit word string data, and is converted into serial data and transmitted to be transmitted.
This means that 10-bit word synchronization data with RD being predetermined positive or negative is included. Such 10-bit word synchronization data is, for example, + K28.5 which is word data DS10 having RD positive or -K2 which is word data DS10 having RD negative.
8.5. Then, the RD of the 10-bit word synchronization data included in the composite 10-bit word string data
Depends on whether the word synchronization data detection on the receiving side is to detect only word synchronization data with RD being positive or only word synchronization data with RD being negative. Set to positive or negative.

Therefore, either the case where the receiving side detects the word synchronous data by detecting only the word synchronous data whose RD is positive or the case where it detects only the word synchronous data whose RD is negative is detected. Under the circumstances, on the receiving side, 10-bit word synchronous data is appropriate as word synchronous data required for processing for reproducing data that has been subjected to data compression such as a plurality of MPEG image information data. Is to be detected. The 10-bit word string data included in the composite 10-bit word string data is 8B /
Good transmission quality can be obtained by being obtained through the 10B conversion processing. therefore,
On the receiving side, under good transmission quality,
Ensuring that a data synchronization state required for processing for reproducing data that has been subjected to data compression, such as a plurality of MPEG image information data based on received composite 10-bit word string data, can be reliably obtained. Is done.

According to the data transmission method according to any one of the first to eighth aspects of the present invention, RD is set to a predetermined positive or negative value. Conversion of composite 10-bit word string data with an additional word data group including 10-bit word synchronization data to serial data, transmission of the converted serial data, and further, reception and reception of the serial data on the receiving side Conversion of serial data to composite 10-bit word string data and the like can be performed using, for example, a transmission circuit device used for transmitting and receiving digital video signals under a fiber channel system. Therefore, 8-bit word string data including word synchronization data is formed based on data to be transmitted, and the 8-bit word string data is converted to 10-bit word string data by 8B / 10B conversion and transmitted. With the transmission method to be transmitted, for example, a plurality of MPEG image information data is set.
Digital video signal data or video and audio signal data to which a plurality of data compressions have been applied can be transmitted so that they can be reliably reproduced on the receiving side by using means that can be prepared relatively easily.

In the data transmission apparatus according to the ninth aspect of the present invention, the data transmission means converts the data into serial data and transmits the serial data. Word string data obtained by performing writing to and reading from a plurality of memory means for a plurality of digital video signal data or video and audio signal data to be obtained, and specific word synchronization data. The combined 10-bit word string data obtained by combining the included additional word data group and the combined 8-bit word string data is formed by performing 8B / 10B conversion processing, converted into serial data, and transmitted to be transmitted. The bit word string data includes RD
Is a predetermined positive or negative 10-bit word synchronization data. 10 like this
The bit word synchronization data is, for example, + K28.5 which is the word data DS10 with RD being positive, or R
-K28.5 which is the word data DS10 with D being negative
It is said. The RD of the 10-bit word synchronization data included in the composite 10-bit word string data is determined based on whether the detection of the word synchronization data on the receiving side detects only the word synchronization data whose RD is positive or not.
It is set to be positive or negative in advance, depending on whether only word synchronization data with D being negative is detected.

Therefore, either the case where the receiving side detects the word synchronous data by detecting only the word synchronous data whose RD is positive or the case where it detects only the word synchronous data whose RD is negative is detected. Under the circumstances, on the receiving side, 10-bit word synchronous data is suitable as word synchronous data required for processing for reproducing data that has been subjected to data compression such as a plurality of MPEG image information data. Is to be detected. The 10-bit word string data included in the composite 10-bit word string data is 8B /
Good transmission quality can be obtained by being obtained through the 10B conversion processing. therefore,
On the receiving side, under good transmission quality,
Ensuring that a data synchronization state required for processing for reproducing data that has been subjected to data compression, such as a plurality of MPEG image information data based on received composite 10-bit word string data, can be reliably obtained. Is done.

According to the data transmission apparatus of the ninth aspect of the present invention, the RD is set to a predetermined positive or negative value.
Conversion of composite 10-bit word string data to serial data with an additional word data group including bit word synchronization data, transmission of the converted serial data, reception of serial data on the receiving side, reception of serial data Conversion of data into composite 10-bit word string data and the like can be performed using, for example, a transmission circuit device used for transmitting and receiving digital video signals under a fiber channel system. Therefore, 8-bit word string data including word synchronization data is formed based on the data to be transmitted,
A transmission method in which the 8-bit word string data is converted into 10-bit word string data by 8B / 10B conversion and transmitted to be transmitted, for example, a plurality of MPEG
A plurality of data compressed digital video signal data or video and audio signal data, which are image information data, are transmitted using a means that can be prepared relatively easily so that they can be reliably reproduced on the receiving side. You can do it.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a data transmission method according to the present invention described in any one of claims 1 to 8 in the claims of the present application. An example of the data transmission device according to the invention described in claim 9 in the range of FIG.

In the example shown in FIG. 1, seven channels of MPEG image information data DCP1, which are a plurality of digital video signal data or video and audio signal data each of which is subjected to data compression. DCP
2, DCP3, DCP4, DCP5, DCP6 and DC
P7 is supplied to the composite 8-bit word string data forming unit 11. 7-channel MPEG image information data DCP
Each of 1 to DCP7 forms 8-bit word string data with a word transmission rate of 3.64525 MBps, for example.

In the composite 8-bit word string data forming section 11, the MPEG image information data DCP1 to DCP7
Are switches 12, 13, 14, 15, 16, 17 and 1
8 respectively. Each of the switches 12-18 has
The control signal CSV from the control signal forming unit 19 is also supplied.

In the control signal forming section 19, the vertical synchronizing signal SSV synchronized with the vertical synchronizing period for each of the MPEG image information data DCP1 to DCP7 and the frequency are set to 3.64.
Clock pulse signal CA having a frequency of 525 MHz and clock pulse signal CB having a frequency of 26.5625 MHz
Is supplied. The control signal CSV obtained from the control signal forming unit 19 is obtained based on, for example, the vertical synchronizing signal SSV and the MPEG image information data DCP1 to DCP.
The period is synchronized with a predetermined period DV corresponding to the vertical synchronization period of P7 or an integral multiple thereof.

The switch 12 has the memory sections 21A and 21B, the switch 13 has the memory sections 22A and 22B, the switch 14 has the memory sections 23A and 23B, and the switch 15 has the memory sections 23A and 23B. Unit 24A and the memory unit 24B, and the switch 16 has the memory unit 25A
And the memory unit 25B, and the switch 17
A and the memory 26B, and the switch 18 is connected to the memory 27A and the memory 27B, respectively.

The switch 12, to which the MPEG image information data DCP1 is supplied, switches the MPE in accordance with the control signal CSV.
The G image information data DCP1 is converted to a control signal CSV, for example.
Are alternately supplied to the memory unit 21A and the memory unit 21B for a predetermined period DV synchronized with each other, and every other predetermined period DV in the MPEG image information data DCP1 is performed.
Are distributed to the memory units 21A and 21B, respectively, and the odd-numbered predetermined period divisions corresponding to. Similarly, a switch 13 to which the MPEG image information data DCP2 to DCP7 are respectively supplied.
18 to store the MPEG image information data DCP2 to DCP7 in accordance with the control signal CSV, for example, for a predetermined period of DV, for each of the memory units 22A to 27A and the memory units 22B to 27B.
Is performed alternately, and every other predetermined period D in the MPEG image information data DCP2 to DCP7 is performed.
The odd-numbered predetermined period section corresponding to V and the even-numbered predetermined period section corresponding to every other predetermined period DV are respectively stored in the memory unit 2.
It distributes and supplies to 2A-27A and 22B-27B.

Each of the memory units 21A to 27A is supplied with a write control signal QWO from the control signal forming unit 19,
Further, a write control signal QWE from the control signal forming unit 19 is supplied to each of the memory units 21B to 27B. Write control signal QWO is formed based on clock pulse signal CA, has a frequency of 3.64525 MHz, and has
G image information data DCP1 to DCP7 are transmitted from control signal forming section 19 in synchronization with odd predetermined period divisions, and write control signal QWE is also formed based on clock pulse signal CA and has a frequency 3.
64525 MHz, and MPEG image information data DCP
It is transmitted from the control signal forming unit 19 as being synchronized with the even-numbered predetermined period division for each of 1 to DCP7.

Thus, the MPEG image information data DC
Each of the odd predetermined period sections in P1 is sequentially written into the memory unit 21A in response to the write control signal QWO,
Each even-numbered predetermined period section in the MPEG image information data DCP1 is sequentially written to the memory unit 21B in accordance with the write control signal QWE. Similarly, each of the odd predetermined period sections in the MPEG image information data DCP2 to DCP7 is sequentially written in the memory sections 22A to 27A in accordance with the write control signal QWO, and each even predetermined period in the MPEG image information data DCP2 to DCP7. The time period is
The data is sequentially written into the memory units 22B to 27B in accordance with the write control signal QWE.

Therefore, as shown in FIG.
7B is alternately performed for a predetermined period DV. Note that, in FIG. 2, an arrow t indicates a lapse of time.

The composite 8-bit word string data forming unit 11 includes a memory unit 29 in addition to the memory units 21A to 27A and 21B to 27B. The memory unit 29 includes an additional word data group D composed of a plurality of 8-bit word data including 8-bit word synchronization data DEK8 and 8-bit word auxiliary data DEA8.
WS is stored.

When the 8-bit word synchronization data DEK8 included in the additional word data group DWS is converted to 10-bit word data, the word data DS10
Is converted into 8-bit word data. Therefore, 8
When converted to 10-bit word data, the bit word synchronization data DEK8 is called by a code name of K28.5, and when the CRD, which is the RD of the word data immediately preceding it, is negative (-). , + K
28.5, and when the CRD, which is the RD based on the word data arranged immediately before, is positive (+), -K
28.5.

The 8-bit word auxiliary data DEA8 included in the additional word data group DWS is 8-bit word data represented as "011 10101" as shown in FIG. 3, and is converted to 10-bit word data. And D21.3. D21.3 is “101010 110 when RD is neutral when the CRD that is the RD based on the word data arranged immediately before is negative (−).
When the CRD, which is the RD based on the word data arranged immediately before, is positive (+), it is set to "101010 0011" in which the RD is neutral.

The control signal forming section 19 is provided in the memory section 21A.
, And a read control signal QR1E from the control signal forming unit 19 is supplied to the memory unit 21B. Similarly, the memory units 22A to 27A
A indicates the read control signals QR2O to QR0 from the control signal forming unit 19;
QR7O are supplied respectively, and the memory units 22B to 27
B, the read control signals QR2E to
QR7E is supplied respectively. Further, a read control signal QRWS from the control signal forming unit 19 is supplied to the memory unit 29.

Each of the read control signals QR1O, QR1E to QR7O, QR7E, and QRWS obtained from the control signal forming unit 19 is formed based on the clock pulse signal CB, has a frequency of 26.5625 MHz, and has a control signal forming unit. The state of transmission from 19 is controlled by the vertical synchronization signal SSV.

Then, M written in the memory unit 21A
Each odd-numbered predetermined period section of the PEG image information data DCP1 is read by 8 bits at a time according to the read control signal QR1O, and each even-numbered predetermined period section of the MPEG image information data DCP1 written in the memory unit 21B is read control signal QR.
8 bits are read out according to 1E. Similarly, each odd-numbered predetermined period section of the MPEG image information data DCP2 to DCP7 written in the memory units 22A to 27A is read out in 8 bits at a time in accordance with the read control signals QR2O to QR7O, and is read to the memory units 22B to 27B, respectively. Each of the even predetermined period sections of the written MPEG image information data DCP2 to DCP7 is a read control signal QR2E to QR2.
8 bits are read out in accordance with 7E. The additional word data group DWS stored in the memory unit 29
Are read according to the read control signal QRWS assuming that the word transmission rate is 26.5625 MBps.

At this time, the memory units 21A to 27A and 2
As shown in FIG. 2B, reading from the memory units 21B to 27B and reading from the memory unit 2B are performed.
Reading from 1A to 27A is alternately performed for a predetermined period DV.

The read control signal QR1O from the memory unit 21A
The odd predetermined period section of the MPEG image information data DCP1, which is read by 8 bits at a time according to
Each of the even-numbered predetermined period sections of the MPEG image information data DCP1 that is read from the 1B in 8 bits at a time in accordance with the read control signal QR1E has a word transmission rate of 26.562.
It is assumed that 8-bit word string data of 5 MBps is formed, the read output D1O (8) as 8-bit word string data is obtained from the memory section 21A, and the 8-bit word string data is obtained from the memory section 21B. The read output D1E (8) is obtained.

Similarly, MPEG image information data DCP2 to DCP2 read from memory units 22A to 27A in units of 8 bits according to read control signals QR2O to QR7O, respectively.
7, each odd-numbered predetermined period section, and the memory section 22B
27B respectively form 8-bit word string data having a word transmission rate of 26.5625 MBps for each even-numbered predetermined period section of the MPEG image information data DCP2 to DCP7 which are read in 8 bits at a time in accordance with the read control signals QR2E to QR7E, respectively. And the memory unit 22
Read outputs D2O (8) to D7O (8) as 8-bit word string data are obtained from A to 27A, respectively, and read outputs D2E (8) to 8-bit word string data are obtained from memory units 22B to 27B. D7E (8) is obtained respectively.

The read outputs D1O (8) to D7O (8) obtained from the memory units 21A to 27A and the additional word data group DW read from the memory unit 29, respectively.
S are collected in the data collection unit 30A. Further, readout outputs D1E obtained from the memory units 21B to 27B respectively.
(8) to D7E (8) and the additional word data group DWS read from the memory unit 29 are included in the data collection unit 3
Collected on OB.

Memory unit 21 in data collection unit 30A
Readout outputs D1O (8) to D7O (8) from A to 27A
And additional word data group DWS from memory unit 29
Are set as the read control signals QR1O to QR7O from the control signal forming unit 19 and the read control signal QRWS.
Is set in accordance with the transmission state of. Then, in the data aggregation unit 30A, according to the aggregation state of the read outputs D1O (8) to D7O (8) from the memory units 21A to 27A and the additional word data group DWS from the memory unit 29,
Synthesized 8-bit word string data DXO (8) having a word transmission rate of 26.5625 MBps is formed. This combined section 8-bit word string data DXO (8)
Are read control signals QR1O to
It has a portion corresponding to a predetermined period DV corresponding to each of the QR70 and the vertical synchronization signal SSV for controlling the transmission state of the read control signal QRWS.

Further, read outputs D1E (8) to D7E from memory units 21B to 27B in data collection unit 30B.
The aggregate state of (8) and the additional word data group DWS from the memory unit 29 is based on the read control signals QR1E to QR7E from the control signal forming unit 19 and the read control signal QWS.
This is set according to the transmission state of the RWS. Then, in the data collection unit 30B, the word transmission rate is set to 26 according to the collection state of the read outputs D1E (8) to D7E (8) from the memory units 21B to 27B and the additional word data group DWS from the memory unit 29. The combined division 8-bit word string data DXE (8) having a size of 0.5625 MBps is formed. This combined 8-bit word string data DXE
(8) also shows the read control signal QR from the control signal forming unit 19
1E to QR7E and a predetermined period D corresponding to the vertical synchronization signal SSV for controlling the transmission state of the read control signal QRWS.
It has a portion corresponding to V.

FIG. 4 shows an example of the combined section 8-bit word string data DXO (8) and DXE (8) formed in the data collecting units 30A and 30B, respectively. This figure 4
In the example shown in FIG. 4A, as shown in FIG. 4A, portions OV1, OV2, OV3,... Corresponding to each predetermined period DV of the combined section 8-bit word string data DXO (8).
Start with an additional word data group DWS, and read outputs D1O (8) to D7O (8) are sequentially connected to each other. Further, as shown in FIG. Part EV1, EV2, EV corresponding to each predetermined period DV of data DXE (8)
.. Are added word data groups DWS
And the readout outputs D1E (8) to D7E
(8) are successively formed.

FIG. 5 shows the data collection units 30A and 30A.
11 shows another example of the combined section 8-bit word string data DXO (8) and DXE (8) formed at 0B, respectively.
In the example shown in FIG. 5, as shown in FIG. 5A, portions OV1, OV2, OV corresponding to the respective predetermined periods DV of the combined section 8-bit word string data DXO (8).
.. Are added word data groups DWS
, Followed by the read output D1O (8), and the read output D2O is added to the additional word data group DWS.
(8), a portion where the additional word data group DWS is followed by the read output D3O (8), a portion where the additional word data group DWS is followed by the read output D4O (8), and a portion where the additional word data group DWS is the read output D5O (8). ), A portion in which the additional word data group DWS is followed by the readout output D6O (8), and a portion in which the additional word data group DWS is followed by the readout output D7O (8) are sequentially connected. 5B, portions EV1, EV2, EV3, and EV3 corresponding to each predetermined period DV of the combined section 8-bit word string data DXE (8).
.. Begin with a portion where the additional word data group DWS is followed by the read output D1E (8), and the read output D2E (8) is added to the additional word data group DWS.
, A portion where the readout output D3E (8) follows the additional word data group DWS, a portion where the readout output D4E (8) follows the additional word data group DWS, and a readout output D5E (8) follows the additional word data group DWS. Read output D6E to partial, additional word data group DWS
The part following (8) and the additional word data group D
It is assumed that the portion where WS is followed by the read output D7E (8) is sequentially connected.

As described above, the composite section 8-bit word string data DXO formed in the data collection section 30A
(8) and each of the synthesized section 8-bit word string data DXE (8) formed in the data collection unit 30B has a word transmission rate at which the additional word data group DWS is inserted at a predetermined word interval. 26.56
This is 8-bit word string data of 25 MBps.
Then, the synthesis section 8-bit word string data DXO (8)
And the combined section 8-bit word string data DXE (8)
Each of them is alternately derived from the data collection units 30A and 30B by a predetermined period DV, and both are supplied to the data collection unit 31. In the data aggregating unit 31, the combined section 8-bit word string data DXO (8) and the combined section 8-bit word string data DXE (8) are sequentially and alternately connected to each other to increase the word transmission rate to 26.5625M.
A series of composite 8-bit word string data DZ at Bps
Form (8).

The additional word data group DWS includes 8-bit word synchronization data DEK8 and 8-bit word auxiliary data DEA8, and is formed to include other 8-bit word data. At least one arbitrary 8-bit word data DE
X8, three 8-bit word synchronization data DEK8 and eight 8-bit auxiliary word data DEA8 are alternately arranged and connected, and further, at least one arbitrary 8-bit word data DEX8 is connected thereto. Is done. When the arbitrary 8-bit word data DEX8 is converted into 10-bit word data, the 10-bit word data DXX. X.

Such an additional word data group DW
In the composite 8-bit word string data DZ (8) formed by inserting S, the portion where the additional word data group DWS is inserted is as shown in FIG. 6A.
In FIG. 6A, MPEG8 is stored in memory units 21A to 21A.
Read outputs D1O (8) to D7O read from 7A
Each 8-bit word data forming (8) is represented, and is converted into 10-bit word data MPEG10 by 8B / 10B conversion.

In the second specific example of the additional word data group DWS, three 8-bit word synchronizing data DEK8 and three 8-bit auxiliary word data DEA8 are alternately arranged at each of the start and end portions. It is assumed that 8-bit word data for inverting RD is arranged in a portion between the start end portion and the end side portion.

Such an additional word data group DW
In the composite 8-bit word string data DZ (8) formed by inserting S, the portion where the additional word data group DWS is inserted is as shown in FIG. 7A.
Also in FIG. 7A, MPEG8 is used for the memory units 21A to 21A.
Read outputs D1O (8) to D7O read from 27A
Each 8-bit word data forming (8) is represented, and is converted into 10-bit word data MPEG10 by 8B / 10B conversion.

A third specific example of the additional word data group DWS is a predetermined number of arbitrary 8-bit word data DEX.
8 is followed by 8-bit word synchronization data DEK8.
10-bit word data in which the RD for the 8-bit word data DEX8 immediately before the 8-bit word synchronization data DEK8 is converted into 8B / 10B and the RD of the 8-bit word data DEX8 is set to negative (-) immediately after the 8-bit word synchronization data DEK8 −DXX · X.

Such an additional word data group DW
In the composite 8-bit word string data DZ (8) formed by inserting S, the portion where the additional word data group DWS is inserted is as shown in FIG. 8A.

Further, additional word data group DWS
Of the first 8-bit word synchronization data D
A predetermined number of arbitrary 8-bit word data DEX8 is stored in EK8.
Followed by a predetermined number of arbitrary 8-bit word data DE
X8 is followed by a second 8-bit word synchronization data DEK8.
EK8 is followed by arbitrary 8-bit word data DEX8, and the RD for the 8-bit word data DEX8 immediately before the second 8-bit word synchronization data DEK8 is negative (-) immediately after the 8B / 10B conversion. Is set to 10-bit word data -DXX.X. In such a case, the first 8-bit word synchronization data D in the additional word data group DWS is used.
The 8-bit word data MPEG8 immediately before EK8 is
Immediately after the B / 10B conversion, 10-bit word data MPEG1 whose RD is set to negative (-)
It shall be 0.

Such an additional word data group DW
In the composite 8-bit word string data DZ (8) formed by inserting S, the portion where the additional word data group DWS is inserted is as shown in FIG. 9A.

The composite 8-bit word sequence data DZ (8) with the word transmission rate of 26.5625 MBps obtained from the data collection unit 31 is sent from the composite 8-bit word sequence data forming unit 11 and converted into an 8B / 10B conversion unit. 32
Supplied to

In the 8B / 10B conversion section 32, the composite 8-bit word string data DZ (8) is divided into 8 bits forming each word in the data, and the divided 8 bits are divided into 8 bits.
Performing an 8B / 10B conversion process for sequentially converting each of the bits into 10-bit data, and setting the word transmission rate based on the composite 8-bit word string data DZ (8) to 26.
Form composite 10-bit word string data DZ (10) of 5625 MBps. At this time, the 8-bit word synchronization data DEK (8) is converted into K28.5, the 8-bit word auxiliary data DEA (8) is converted into D21.3, and an arbitrary 8-bit word data DEX8 is converted into a 10-bit word data. DXX. X and the 8-bit word data MPEG8 is converted to the 10-bit word data MP
It is converted to EG10.

Therefore, the composite 8-bit word string data D
Z (8) additional word data group DWS inserted
Is as shown in FIG. 6A, the composite 1
As shown in FIG. 6B, the 0-bit word string data DZ (10) has a portion based on the additional word data group DWS when the immediately preceding 10-bit word data MPEG10 makes RD positive (+). (Or such as a portion based on the additional word data group DWS shown in FIG. 6C),
The immediately preceding 10-bit word data MPEG10 is RD
Is negative (-), it is as shown in FIG. 6C (or as a part based on the additional word data group DWS shown in FIG. 6B).

The composite 8-bit word string data DZ
Additional word data group DWS inserted in (8)
Is as shown in FIG. 7A, the composite 1
As shown in FIG. 7B, the 0-bit word string data DZ (10) has a portion based on the additional word data group DWS when the immediately preceding 10-bit word data MPEG10 sets RD to positive (+). While the immediately preceding 10-bit word data MP
When the EG 10 sets the RD to be negative (-), the RD is as shown in FIG. 7C.

When the additional word data group DWS inserted into the composite 8-bit word string data DZ (8) is as shown in FIG. 8A, the composite 10-bit word string data DZ (10) The portion based on the additional word data group DWS therein is as shown in FIG.
It is assumed that the portion based on S includes + K28.5 which makes RD positive (+).

Further, composite 8-bit word string data DZ
Additional word data group DWS inserted in (8)
Is as shown in FIG. 9A, the composite 10-bit word string data DZ (10) has a part based on the additional word data group DWS,
As shown in FIG. 9B, the first 8-bit word synchronization data DE in the additional word data group DWS is added to the portion based on the additional word data group DWS.
Based on K8 and the second 8-bit word synchronization data DEK8, + K28.5 which makes two RDs positive (+) is included.

The composite 8-bit word string data DZ
(8), if the portion into which the additional word data group DWS is inserted is as shown in FIG. 8A or as shown in FIG. The group DWS sets the RD to positive () in the portion based on the additional word data group DWS in the composite 10-bit word sequence data DZ (10) obtained by performing the 8B / 10B conversion on the composite 8-bit word sequence data DZ (8) +), That is, 10-bit word synchronous data, that is, data that includes + K28.5. However, in some cases,
The composite 8-bit word string data DZ (8) has a portion where the additional word data group DWS is inserted, similar to the one shown in FIG. 8A or the one shown in FIG. 9A. The additional word data group DWS is added to the composite 10-bit word string data DZ (10) obtained by subjecting the composite 8-bit word string data DZ (8) to 8B / 10B conversion. In the part based on the word data group DWS,
It may be selected to include 10-bit word synchronization data with RD being negative (-), that is, -K28.5.

The composite 10-bit word string data DZ (10) having a word transmission rate of 26.5625 MBps obtained from the 8B / 10B converter 32 is P / P
It is supplied to the S conversion unit 33. The P / S converter 33 performs a P / S conversion process for converting the parallel data into serial data on the composite 10-bit word string data DZ (10), and executes the composite 10-bit word string data DZ (1).
0), the bit transmission rate is 26.5625 × 1
Serial data DZ with 0 = 265.625 Mbps
S, and transmits the serial data DZS to the transmission signal forming unit 3.
4

The transmission signal forming section 34 outputs the serial data D
For example, a ZS is connected to a coaxial cable or an optical cable.
An electric signal suitable for a data transmission line formed using a coaxial cable or a data transmission line formed using an optical fiber for transmission through a data transmission line formed using a fiber. The signal is converted into a transmission signal SZ that is a suitable optical signal 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 33 and the transmission signal forming section 3
4 converts the composite 10-bit word string data DZ (10) having a word transmission rate of 26.5625 MBps into serial data DZS having a bit transmission rate of 265.625 Mbps and transmits the data. The / S conversion unit 33 and the transmission signal formation unit 34 are, for example, integrated circuits (I / O) provided for transmitting digital data under a fiber channel system.
C) 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. 10
The 7-channel MPEG image information data DCP1 to DCP7 can be relatively easily converted into a 10-bit word string data including bit word synchronization data and transmitted by the 10-bit word string data to be transmitted. Thus, it is possible to multiplex and transmit the data so that the data can be surely reproduced on the receiving side by using the means that can be adjusted.

In the example shown in FIG. 1 described above, each of the data is supplied to the composite 8-bit word string data forming unit 11 to be transmitted, and each of them is subjected to data compression. A plurality of digital video signal data or video and audio signal data each have a word transmission rate,
For example, the 7-channel MPEG image information data DCP1 to DCP7, which are 8-bit word string data of 3.64525 MBps, are used.
Instead of the PEG image information data DCP1 to DCP7, each sets the word transmission rate to, for example, 3.64525 × 8
= 29.162 Mbps 7
The MPEG image information data of the channel may be supplied to the composite 8-bit word string data forming unit 11.

FIG. 10 shows another example of the data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application. 14 shows another example of the data transmission device according to the invention described in claim 9 in the first embodiment.

In the example shown in FIG. 10, each of a plurality of digital video signal data or video and audio signal data to be subjected to data compression is used.
Channel MPEG image information data DCP1, DCP
2 and DCP3 are supplied to the composite 8-bit word string data forming unit 41. Each of the three-channel MPEG image information data DCP1 to DCP3 forms 8-bit word string data with a word transmission rate of 3.64525 MBps, for example.

In the composite 8-bit word string data forming section 41, the MPEG image information data DCP1 to DCP3
Are supplied to switches 42, 43 and 44, respectively. A control signal CSV from the control signal forming unit 45 is also supplied to each of the switches 42 to 44.

In the control signal forming section 45, the vertical synchronizing signal SSV synchronized with the vertical synchronizing period for each of the MPEG image information data DCP1 to DCP3 and the frequency are set to 3.64.
A clock pulse signal CA having a frequency of 525 MHz and a clock pulse signal CC having a frequency of 125 MHz are supplied. The control signal CSV obtained from the control signal forming unit 45 is obtained based on, for example, the vertical synchronization signal SSV, and corresponds to the vertical synchronization period for each of the MPEG image information data DCP1 to DCP3 or a period of an integral multiple thereof. This is synchronized with the predetermined period DV.

The switch 42 has a memory section 51A and a memory section 51B, the switch 43 has a memory section 52A and a memory section 52B, and the switch 44 has a memory section 5A.
3A and the memory unit 53B are connected to each other.

The switch 42 to which the MPEG image information data DCP1 is supplied operates according to the control signal CSV to the MPE.
The G image information data DCP1 is converted to a control signal CSV, for example.
Are alternately supplied to the memory unit 51A and the memory unit 51B for each predetermined period DV synchronized with each other, and every other predetermined period DV in the MPEG image information data DCP1 is performed.
Are distributed to the memory units 51A and 51B respectively. Similarly, a switch 4 to which the MPEG image information data DCP2 and DCP3 are respectively supplied.
3 and 44 store the MPEG image information data DCP2 and DCP3 in the memory units 52A and 53A and the memory unit 52B in accordance with the control signal CSV, for example, by a predetermined period DV.
And 53B are alternately supplied to the MPEG
In the image information data DCP2 and DCP3, odd-numbered predetermined period divisions corresponding to every other predetermined period DV and even-numbered predetermined period divisions corresponding to other every other predetermined period DV are respectively stored in the memory units 52A and 53A and the memories 52B and 52B. 53B
And supply it.

Each of the memory units 51A to 53A is supplied with a write control signal QWO from the control signal forming unit 45.
Further, a write control signal QWE from the control signal forming unit 45 is supplied to each of the memory units 51B to 53B. Write control signal QWO is formed based on clock pulse signal CA, has a frequency of 3.64525 MHz, and has
The control signal forming unit 45 transmits the G image information data DCP1 to DCP3 in synchronization with the odd-numbered predetermined period divisions, and the write control signal QWE is also formed based on the clock pulse signal CA. 3.
64525 MHz, and MPEG image information data DCP
It is transmitted from the control signal forming unit 45 as synchronized with the even-numbered predetermined period division for each of 1 to DCP3.

Thus, the MPEG image information data DC
Each odd-numbered predetermined period segment in P1 is sequentially written into the memory unit 51A in response to the write control signal QWO,
Each even-numbered predetermined period section in the MPEG image information data DCP1 is sequentially written to the memory unit 51B in accordance with the write control signal QWE. Similarly, each odd predetermined period segment in the MPEG image information data DCP2 and DCP3 is
The write control signals QWO are supplied to the memory units 52A and 53A, respectively.
, And the even-numbered predetermined periods in the MPEG image information data DCP2 and DCP3 are sequentially written to the memory units 52B and 53B in response to the write control signal QWE.

Therefore, as shown in FIG. 11A, writing in the memory sections 51A to 53A and writing to the memory sections 51B to 51B
Writing in 53B is performed alternately by the predetermined period DV. Note that, in FIG. 11, an arrow t indicates a lapse of time.

The composite 8-bit word string data forming section 41 includes a memory section 55 in addition to the memory sections 51A to 53A and 51B to 53B. The memory unit 55 includes an additional word data group D composed of a plurality of 8-bit word data including 8-bit word synchronization data DEK8 and 8-bit word auxiliary data DEA8.
WS is stored.

The 8-bit word synchronization data DEK8 and the 8-bit word auxiliary data DEA8 included in the additional word data group DWS are the 8-bit word synchronization data DEK8 and the 8-bit data included in the additional word data group DWS in the example shown in FIG. Word auxiliary data D
It is the same as EA8.

The memory 51A includes a control signal forming unit 45.
, And a read control signal QR1E from the control signal forming unit 45 is supplied to the memory unit 51B. Similarly, the memory units 52A and 52A
3A, the read control signal QR2O from the control signal forming unit 45
And QR3O, respectively, and read control signals QR from the control signal forming unit 45 to the memory units 52B and 53B.
2E and QR3E are supplied respectively. Further, the memory unit 55 has a read control signal QR from the control signal forming unit 45.
WS is supplied.

Each of the read control signals QR1O, QR1E to QR3O, QR3E, and QRWS obtained from the control signal forming section 45 is formed based on the clock pulse signal CC, has a frequency of 125 MHz, and has a frequency of 125 MHz. Is controlled by the vertical synchronization signal SSV.

Then, M written in the memory unit 51A
Each odd-numbered predetermined period section of the PEG image information data DCP1 is read by 8 bits in accordance with the read control signal QR1O, and each even-numbered predetermined period section of the MPEG image information data DCP1 written in the memory unit 51B is read control signal QR.
8 bits are read out according to 1E. Similarly, each odd-numbered predetermined period segment of each of the MPEG image information data DCP2 and DCP3 written in the memory units 52A and 53A is divided into eight according to the read control signals QR2O and QR3O.
MPEG image information data DCP2 and DCP2 read bit by bit and written in the memory units 52B and 53B, respectively.
Each even-numbered predetermined period segment of each of CP3 is read control signal QR.
8 bits are read out according to 2E and QR3E.
Further, the additional word data group DWS stored in the memory unit 55 is read in accordance with the read control signal QRWS with the word transmission rate being set to 125 MBps.

At this time, the memory units 51A to 53A and 5A
As shown in FIG. 11B, reading from the memory units 51B to 53B and reading from the memory unit 5B are performed.
Reading from 1A to 53A is performed alternately for a predetermined period DV.

Read control signal QR1O from memory unit 51A
And a memory section 5 for each odd-numbered predetermined period of the MPEG image information data
Each of the even-numbered predetermined period divisions of the MPEG image information data DCP1 read from the 1B in 8 bits at a time in accordance with the read control signal QR1E has a word transmission rate of 125 MBp.
It is assumed that 8-bit word string data is formed as s, the readout D1O (8) as 8-bit word string data is obtained from the memory unit 51A, and the 8-bit word string data is obtained from the memory unit 51B. Read output D
1E (8) is obtained.

Similarly, each of the odd-numbered predetermined periods of the MPEG image information data DCP2 and DCP3 read from the memory sections 52A and 53A in accordance with the read control signals QR2O and QR3O, respectively, and the memory sections 52B and 53B respectively. Read control signals QR2E and Q2
Each of the even-numbered predetermined period divisions of the MPEG image information data DCP2 and DCP3 read out in units of 8 bits in accordance with R3E has a word transmission rate of 125 MBps.
Readout outputs D2O (8) and D3O (8) as 8-bit word string data are obtained from memory sections 52A and 53A, respectively, and 8 bit word string data are formed from memory sections 52B and 53B. Readout outputs D2E (8) and D3E as word string data
(8) is obtained respectively.

The read outputs D1O (8) to D3O (8) obtained from the memory units 51A to 53A and the additional word data group DW read from the memory unit 55, respectively.
S are collected in the data collection unit 56A. Further, readout outputs D1E obtained from the memory units 51B to 53B respectively.
(8) to D3E (8) and the additional word data group DWS read from the memory unit 55 are
Collected in 6B.

Memory unit 51 in data collection unit 56A
Readout outputs D1O (8) to D3O (8) from A to 53A
And additional word data group DWS from memory unit 55
Are set as the read control signals QR1O to QR3O from the control signal forming unit 45 and the read control signal QRWS.
Is set in accordance with the transmission state of. Then, in the data collection unit 56A, according to the collection state of the read outputs D1O (8) to D3O (8) from the memory units 51A to 53A and the additional word data group DWS from the memory unit 55,
Synthesized 8-bit word string data DXO (8) having a word transmission rate of 125 MBps is formed. The synthesized section 8-bit word string data DXO (8) is provided for a predetermined period DV according to each of the read control signals QR1O to QR3O from the control signal forming unit 45 and the vertical synchronization signal SSV for controlling the transmission state of the read control signal QRWS. Is provided.

Further, read outputs D1E (8) to D3E from memory units 51B to 53B in data collecting unit 56B.
The aggregate state of (8) and the additional word data group DWS from the memory unit 55 is based on the read control signals QR1E to QR3E from the control signal forming unit 45 and the read control signal Q
This is set according to the transmission state of the RWS. Then, in the data collection unit 56B, the word transmission rate is set to 125 MBps according to the aggregation state of the read outputs D1E (8) to D3E (8) from the memory units 51B to 53B and the additional word data group DWS from the memory unit 55. Is formed, the synthesis section 8-bit word string data DXE (8) is formed.
This combined section 8-bit word string data DXE (8) is also
Read control signals QR1E to QR from control signal forming section 45
3E and a portion corresponding to a predetermined period DV corresponding to the vertical synchronization signal SSV for controlling the transmission state of the read control signal QRWS.

FIG. 12 shows the data collection units 56A and 56B
2 shows an example of the combined section 8-bit word string data DXO (8) and DXE (8) formed respectively in FIG. In the example shown in FIG. 12, as shown in FIG. 12A, portions OV1, OV2, OV3, corresponding to each predetermined period DV of the combined section 8-bit word string data DXO (8).
.. Begin with an additional word data group DWS, and read outputs D1O (8) to D3O (8) are sequentially connected to each other. Further, as shown in FIG. Bit word string data DXE
Part EV1, EV corresponding to each predetermined period DV of (8)
, EV3,... Start with an additional word data group DWS, and read outputs D1E (8) to D1E
3E (8) are sequentially formed.

FIG. 13 shows another example of the combined divided 8-bit word string data DXO (8) and DXE (8) formed in the data collecting units 56A and 56B, respectively. In the example shown in FIG. 13, as shown in FIG. 13A, the composite section 8-bit word string data DXO
Part OV1, OV corresponding to each predetermined period DV of (8)
, OV3,... Start from the portion where the additional word data group DWS is followed by the readout output D1O (8), and the additional word data group DWS is followed by the portion where the readout output D2O (8) is added. A portion in which the read output D3O (8) continues to the word data group DWS is successively formed. Further, as shown in FIG.
EV1, EV2, EV corresponding to each predetermined period DV
.. Are added word data groups DWS
, Followed by a read output D2E in the additional word data group DWS.
The part following (8) and the additional word data group D
The portion where WS is followed by the read output D3E (8) is sequentially formed.

In this manner, the composite section 8-bit word string data DXO formed in data collection section 56A
(8) Each of the synthesized section 8-bit word string data DXE (8) formed in the data collection unit 56B has a word transmission rate at which the additional word data group DWS is inserted at a predetermined word interval. 125MB
This is 8-bit word string data of ps. And
The combined section 8-bit word string data DXO (8) and the combined section 8-bit word string data DXE (8) are derived from the data collecting sections 56A and 56B alternately by a predetermined period DV, respectively. , Data collection unit 5
7 is supplied. In the data aggregating unit 57, the combined section 8-bit word string data DXO (8) and the combined section 8-bit word string data DXE (8) are sequentially and alternately connected to form a series having a word transmission rate of 125 MBps. To form the composite 8-bit word string data DZ (8).

The additional word data group DWS includes 8-bit word synchronization data DEK8 and 8-bit word auxiliary data DEA8, and further includes other 8-bit word data. And the composite 8-bit word string data DZ (8) formed by insertion of the additional word data group DWS in the example of
The portion where the WS is inserted is as shown in FIG. 6A, FIG. 7A, FIG. 8A or FIG. 9A.

The composite 8-bit word sequence data DZ (8) with the word transmission rate of 125 MBps obtained from the data collection unit 57 is transmitted from the composite 8-bit word sequence data forming unit 41 and sent to the 8B / 10B conversion unit 58. Supplied.

The 8B / 10B conversion section 58 divides the composite 8-bit word string data DZ (8) into 8 bits forming each word in the data, and divides the data into 8 bits.
An 8B / 10B conversion process of sequentially converting each of the bits into 10-bit data is performed, and the word transmission rate based on the composite 8-bit word string data DZ (8) is set to 125.
Composite 10-bit word string data DZ (1
0) is formed. At this time, the 8-bit word synchronization data D
EK (8) is converted to K28.5, 8-bit word auxiliary data DEA (8) is converted to D21.3, and arbitrary 8-bit word data DEX8 is converted to 10-bit word data DXX. X, and the 8-bit word data MPEG8 is converted to the 10-bit word data MPEG10.
Is converted to

Therefore, the composite 8-bit word string data D
Z (8) additional word data group DWS inserted
Is as shown in FIG. 6A, the composite 1
As shown in FIG. 6B, the 0-bit word string data DZ (10) has a portion based on the additional word data group DWS when the immediately preceding 10-bit word data MPEG10 makes RD positive (+). (Or such as a portion based on the additional word data group DWS shown in FIG. 6C),
The immediately preceding 10-bit word data MPEG10 is RD
Is negative (-), it is as shown in FIG. 6C (or as a part based on the additional word data group DWS shown in FIG. 6B).

Also, the composite 8-bit word string data DZ
Additional word data group DWS inserted in (8)
Is as shown in FIG. 7A, the composite 1
As shown in FIG. 7B, the 0-bit word string data DZ (10) has a portion based on the additional word data group DWS when the immediately preceding 10-bit word data MPEG10 sets RD to positive (+). While the immediately preceding 10-bit word data MP
When the EG 10 sets the RD to be negative (-), the RD is as shown in FIG. 7C.

When the additional word data group DWS inserted into the composite 8-bit word string data DZ (8) is as shown in FIG. 8A, the composite 10-bit word string data DZ (10) The portion based on the additional word data group DWS therein is as shown in FIG.
It is assumed that the portion based on S includes + K28.5 which makes RD positive (+).

Further, composite 8-bit word string data DZ
Additional word data group DWS inserted in (8)
Is as shown in FIG. 9A, the composite 10-bit word string data DZ (10) has a part based on the additional word data group DWS,
As shown in FIG. 9B, the first 8-bit word synchronization data DE in the additional word data group DWS is added to the portion based on the additional word data group DWS.
Based on K8 and the second 8-bit word synchronization data DEK8, + K28.5 which makes two RDs positive (+) is included.

The composite 8-bit word string data DZ
(8), if the portion into which the additional word data group DWS is inserted is as shown in FIG. 8A or as shown in FIG. The group DWS sets the RD to positive () in the portion based on the additional word data group DWS in the composite 10-bit word sequence data DZ (10) obtained by performing the 8B / 10B conversion on the composite 8-bit word sequence data DZ (8) +), That is, 10-bit word synchronous data, that is, data that includes + K28.5. However, in some cases,
The composite 8-bit word string data DZ (8) has a portion where the additional word data group DWS is inserted, similar to the one shown in FIG. 8A or the one shown in FIG. 9A. The additional word data group DWS is added to the composite 10-bit word string data DZ (10) obtained by subjecting the composite 8-bit word string data DZ (8) to 8B / 10B conversion. In the part based on the word data group DWS,
It may be selected to include 10-bit word synchronization data with RD being negative (-), that is, -K28.5.

Then, the composite 1 having a word transmission rate of 125 MBps obtained from the 8B / 10B converter 58 is used.
The 0-bit word string data DZ (10) is supplied to the P / S converter 59. The P / S conversion unit 58 performs a P / S conversion process for converting parallel data into serial data on the composite 10-bit word string data DZ (10), and performs composite 10-bit word string data DZ (10). , The bit transmission rate is 125 × 10 = 1.25 Gbp
s is obtained, and the serial data DZS is supplied to the transmission signal forming unit 60.

The transmission signal forming section 60 transmits the serial data D
For example, a ZS is connected to a coaxial cable or an optical cable.
An electric signal suitable for a data transmission line formed using a coaxial cable or a data transmission line formed using an optical fiber for transmission through a data transmission line formed using a fiber. The signal is converted into a transmission signal SZ that is a suitable optical signal and transmitted.
Thereby, transmission of the serial data DZS is performed.

In the data transmission apparatus shown in FIG. 10 as described above, P / S conversion section 59 and transmission signal forming section 60 transmit composite 10-bit word string data DZ (10 ) Is converted to serial data DZS having a bit transmission rate of 1.25 Gbps and transmitted. Therefore, such a P / S conversion unit 59 and a transmission signal formation unit 60 may be used, for example, in a fiber channel system. And the integrated circuit (IC) element provided for transmitting the digital data in the above. 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. It is converted into 10-bit word string data including 10-bit word synchronization data, and a 3-channel MPEG is used in a transmission method in which the 10-bit word string data is transmitted to be transmitted.
The image information data DCP1 to DCP3 can be multiplexed and transmitted so that they can be reliably reproduced on the receiving side by using means that can prepare the image information data relatively easily.

In such a case, the M of three channels is used.
Since each of the PEG image information data DCP1 to DCP3 is 8-bit word string data with a word transmission rate of 3.64525 MBps, when converted to a bit transmission rate, 3.64525 × 8 × 3 × 10/8 = 109.
3575 Mbps, whereas the serial data DZS has a bit transmission rate of 1.25 Gbps.
ps, so three-channel MPEG
The image information data DCP1 to DCP3 are transmitted at about 10 times speed.

In the example shown in FIG. 10 described above, each of the data is supplied to the composite 8-bit word string data forming section 41 to be transmitted, and each of them is subjected to data compression. A plurality of digital video signal data or video and audio signal data each have a word transmission rate,
For example, three-channel MPEG image information data DCP1 to DCP3, which are 8-bit word string data of 3.64525 MBps, are used.
Instead of the PEG image information data DCP1 to DCP3, each sets the word transmission rate to, for example, 3.64525 × 8
= 3, which is serial data with 29.162 Mbps
The MPEG image information data of the channel may be supplied to the composite 8-bit word string data forming unit 41.

FIG. 14 shows an example of the data transmission method shown in FIG. 1 according to an example of the data transmission method according to the invention described in any one of claims 1 to 8 of the present application. An example of a data receiving apparatus which receives a transmission signal SZ based on serial data DZS obtained by converting composite 10-bit word string data DZ (10) sent from the signal forming unit 34 is shown.

In the example of the data receiving apparatus shown in FIG. 14, 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 70 for receiving a transmission signal SZ which is an optical signal suitable for the data transmission path. The receiving unit 70 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 71.

In the synchronous data detection / S / P converter 71, + K28.5 (or -K28.5), which is 10-bit word data in the serial data DZS, is used.
, The part converted into serial data is detected as synchronization data, word synchronization is performed based on the detected synchronization data, S / P conversion processing is performed on the serial data DZS, and A or C in FIG. A or C as shown in FIG. 17A or FIG. 18A, for example, composite 10-bit word string data D which is parallel data having a word transmission rate of 26.5625 MBps.
Form Z (10). A or C of FIG. 15, FIG.
A or C of FIG. 17, the composite 10-bit word string data DZ (10) shown in FIG. 17A or FIG. 18A depends on the contents of the additional word data group DWS and the RD of the data immediately before the additional word data group DWS. Formed selectively. Then, the composite 10-bit word string data DZ obtained from the synchronous data detection / S / P converter 71
(10) is supplied to the 10B / 8B conversion unit 72.

In the 10B / 8B conversion section 72, the composite 10-bit word string data DZ (10) is divided into 10 bits each, and each of the divided 10 bits is sequentially converted into 8-bit data. 10B / 8 going
B-conversion processing is performed, and complex 8-bit word string data DZ (8) having a word transmission rate of 26.5625 MBps is formed based on 8-bit data sequentially obtained by the 10B / 8B conversion processing. And 10B
The word transmission rate obtained from the / 8B conversion unit 72 is 2
The composite 8-bit word string data DZ (8) of 6.5625 MBps is supplied to the word data separation unit 73.

The synchronous data detection / S / P converter 71
, The composite 10-bit word string data DZ (1
+ K in the additional word data group DWS in 0)
28.5 (or -K28.5) is detected as synchronous data, and a synchronous data detection output signal SWS is transmitted.
This synchronous data detection output signal SWS is based on the contents of the additional word data group DWS and the additional word data group D in the composite 10-bit word string data DZ (10).
According to the RD of the data immediately before WS, for example, it is obtained as shown in B or D in FIG. 15, B or D in FIG. 16, B in FIG. 17 or B in FIG. Thus, the synchronous data detection output signal SWS obtained from the synchronous data detection / S / P converter 71 is supplied to the word data separator 73.

The word data separating section 73 uses the synchronous data detection output signal SWS from the synchronous data detecting / S / P converting section 71 to add an additional word data group from the composite 8-bit word string data DZ (8). DWS separation is performed, and the composite 8-bit word string data DZ (8)
The 8-bit word string data DM (8) having a word transmission rate of 26.5625 MBps based on the above and the additional word data group DWS are separated and taken out.

As a result, 8-bit word string data DM (8) having a word transmission rate of 26.5625 MBps obtained from word data separating section 73 is supplied to data restoring section 74. Are also supplied to the data restoring unit 74.

In data restoring section 74, 8-bit word string data DM (8) from word data separating section 73 is output.
Is supplied to the movable contact 76a of the switch 76,
Further, the additional word data group DWS from the word data separating unit 73 is supplied to the control signal forming unit 75.
The control signal forming unit 75 has a frequency of 3.64525 MHz.
The clock pulse signal CA having a frequency z and the frequency is 26.5.
A clock pulse signal CB of 625 MHz is also supplied.

The control signal CDV from the control signal forming unit 75 is also supplied to the switch 76 having the movable contact 76a to which the 8-bit word string data DM (8) from the word data separating unit 73 is supplied. The control signal CDV is formed in the control signal forming section 75 in accordance with the additional word data group DWS from the word data separating section 73, and each predetermined signal in the 10-bit word string data DM (8) obtained from the word data separating section 73. This is synchronized with a portion corresponding to the period DV (hereinafter, referred to as a predetermined period DV portion).

The switch 76 alternately connects the movable contact 76a to the selection contact 76b and the selection contact 76c in accordance with a control signal CDV from the control signal forming unit 75, at intervals corresponding to a predetermined period DV portion. Perform the operation. The selection contacts 76b of the switch 76 include the memory units 81A, 82
A, 83A, 84A, 85A, 86A and 87A are connected, and the selection contacts 67c of the switch 76 are connected to the memory units 81B, 82B, 83B, 84B, 85B, 86B.
And 87B are connected.

As a result, the switch 76 outputs the control signal C
According to the DV, the 8-bit word string data DM (8) from the word data separating unit 73 is divided into DV portions for a predetermined period,
Each of the memory units 81A to 87A and the memory unit 81B
To 87B.

The write control signals QW1O, QW2O, QW from the control signal forming section 75 are stored in the memory sections 81A to 87A.
3O, QW4O, QW5O, QW6O, and QW7O are supplied, respectively, and the write control signals QW1E, QW1E from the control signal forming unit 75 are supplied to the memory units 81B to 87B, respectively.
QW2E, QW3E, QW4E, QW5E, QW6E and QW7E are supplied respectively. Write control signals QW1O to QW7O and QW1E obtained from control signal forming section 75
To QW7E are formed based on the clock pulse signal CB and have a frequency of 26.5625 MHz, and the transmission timing from the control signal forming unit 75 is determined according to the additional word data group DWS. Furthermore, in the 8-bit word string data DM (8) from the word data separating unit 73, the control is performed in accordance with the timing set in advance corresponding to the data synthesis mode of the DV portion for each predetermined period.

At this time, the writing in each of the memory units 81A to 87A and the writing in each of the memory units 81B to 87B are alternately performed for each period section corresponding to each predetermined period DV portion with which the control signal CDV is synchronized. Done. Then, in each of the period divisions corresponding to every other predetermined period DV portion, in accordance with each transmission timing of the write control signals QW1O to QW7O from the control signal forming section 75,
8-bit word string data D1O (8), D2O (8), D3O (8), D4O constituting a first part of a predetermined period DV portion of 8-bit word string data DM (8)
(8), D5O (8), D6O (8) and D7O (8)
Are written together in the memory units 81A to 87A, respectively. Further, in each of the other time periods corresponding to the other predetermined time period DV portion, the 8-bit word string data DM 8-bit word string data D1E (8), D2E (8), D3E constituting the second part of the DV part for the predetermined period of (8)
(8), D4E (8), D5E (8), D6E (8) and D7E (8) are collectively written in the memory units 81B to 87B, respectively.

Further, a read control signal QRO from control signal forming unit 75 is supplied to each of memory units 81A to 87A, and a read control signal QRO from control signal forming unit 75 is supplied to each of memory units 81B to 87B. A control signal QRE is provided. The read control signal QRO has a frequency of 3.64525 MHz based on the clock pulse signal CA, and according to the additional word data group DWS, the 8-bit word string data DM (8) from the word data separation unit 73. In the DV portion for a predetermined period of time
And the read control signal QRE is formed to have a frequency of 3.64525 MHz based on the clock pulse signal CA, and is generated in accordance with the additional word data group DWS. , In the 8-bit word string data DM (8) from the word data separation unit 73 during the predetermined period DV.
Are transmitted from the control signal forming section 75 in synchronization with the portion.

Thus, in the period division corresponding to every other predetermined period DV portion, memory units 81A to 87A
8-bit word string data D1O respectively written to
(8) to D7O (8) are in accordance with the read control signal QRO in the period section corresponding to the next predetermined period DV portion.
These are read from the memory units 81A to 87A, respectively. At this time, each of the 8-bit word string data D1O (8) to D7O (8) written in the memory units 81A to 87A has a word transmission rate of 3.664525 MBps corresponding to the frequency 3.64525 MHz of the read control signal QRO.
The word transmission rate based on the 8-bit word string data D1O (8) to D7O (8) is read from the memory units 81A to 87A, respectively. Readout outputs S1O and S2 converted into 8-bit word string data of 64525 Mbps
O, S3O, S4O, S5O, S6O and S7O are obtained.

Further, in a period division corresponding to every other predetermined period DV portion, the 8-bit word string data D1E (8) written in the memory units 81B to 87B respectively.
To D7E (8) are read from the memory units 81B to 87B in accordance with the read control signal QRE in the period section corresponding to the next predetermined period DV portion. At this time, each of the 8-bit word string data D1E (8) to D7E (8) read from the memory units 81B to 87B has the word transmission rate corresponding to the frequency 3.645 of the read control signal QRE.
It forms 8-bit word string data of 3.64525 MBps corresponding to 25 MHz.
8B word string data D1 from 1B to 87B, respectively.
Readout outputs S1E, S2E, S3E, S4E, S which are 8-bit word string data having a word transmission rate of 3.64525 Mbps based on E (8) to D7E (8).
5E, S6E and S7E are obtained.

Read output S1 obtained from memory unit 81A
O and the read output S1E obtained from the memory unit 81B are supplied to the switch 91, and the read output S1 obtained from the memory unit 82A.
2O and the read output S2E obtained from the memory section 82B are provided to the switch 92, the read output S3O obtained from the memory section 83A and the read output S3E obtained from the memory section 83B are provided to the switch 93, and the read output obtained from the memory section 84A. S4O and read output S4E obtained from memory unit 84B
Are provided to the switch 94 so that the read output S5O obtained from the memory unit 85A and the read output S5 obtained from the memory unit 85B are provided.
E switches the switch 95 between the read output S60 obtained from the memory 86A and the read output S obtained from the memory 86B.
6E is supplied to the switch 96, and the read output S7O obtained from the memory unit 87A and the read output S7E obtained from the memory unit 87B are supplied to the switch 97, respectively.

Each of the switches 91 to 97 is also supplied with a control signal CSV from the control signal forming section 75. The control signal CSV is synchronized with the control signal CDV.

The switch 91 takes out the read output S1O and the read output S1E alternately in accordance with the control signal CSV, and outputs the MPEG image information data DCP1 having a word transmission rate of 3.664525 MBps, which is a series of 8-bit word string data. Reproduce. Similarly, switches 92 to
97 is a read output S2 according to the control signal CSV.
O, S2E and ~ S7O and S7E are alternately taken out, and MPEG image information data DCP2 to DCP7 having a word transmission rate of 3.64525 MBps, which is a series of 8-bit word string data, are reproduced.

In this way, the 7-channel MPEG image information data D obtained from the switches 91 to 97 respectively.
CP1 to DCP7 are transmitted from the data restoration unit 74.

FIG. 19 shows an example of the data transmission apparatus shown in FIG. 10 according to another example of the data transmission method according to any one of the first to eighth aspects of the present invention. Of the composite 10-bit word string data DZ (1
0) shows an example of a data receiving apparatus that receives a transmission signal SZ based on serial data DZS obtained by converting (0).

In the example of the data receiving apparatus shown in FIG. 19, 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 100 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 section 100 reproduces the serial data DZS based on the received transmission signal SZ and supplies it to the synchronous data detection / S / P conversion section 101.

In the synchronous data detecting / S / P converter 101, + K28.5 (or -K28.) Which is 10-bit word data in the serial data DZS is used.
5) Detects the part converted to serial data as synchronous data, performs word synchronization based on the detected synchronous data, performs S / P conversion processing on serial data DZS, and for example, sets the word transmission rate to 125 MBps. The composite 10-bit word string data DZ (10), which is parallel data, is formed. Then, synchronous data detection S
The composite 10-bit word string data DZ (10) obtained from the / P converter 101 is supplied to the 10B / 8B converter 102.

In the 10B / 8B conversion section 102, the composite 10-bit word string data DZ (10) is divided into 10 bits each, and each of the divided 10 bits is sequentially converted into 8-bit data. Going 10B /
8B conversion processing is performed, and complex 8-bit word string data DZ (8) having a word transmission rate of 125 MBps is formed based on 8-bit data sequentially obtained by the 10B / 8B conversion processing. And 10B / 8B
The word transmission rate obtained from the conversion unit 102 is 125M
Composite 8-bit word string data DZ (8) to be Bps
Is supplied to the word data separation unit 103.

The synchronous data detection / S / P converter 10
1, the composite 10-bit word string data DZ (1
+ K in the additional word data group DWS in 0)
28.5 (or -K28.5) is detected as synchronous data, and a synchronous data detection output signal SWS is transmitted.
This synchronous data detection output signal SWS is based on the contents of the additional word data group DWS and the additional word data group D in the composite 10-bit word string data DZ (10).
According to the RD of the data immediately before WS, it is obtained in the same manner as in the example shown in FIG. Synchronous data detection output signal SWS obtained from synchronous data detection / S / P conversion section 101
Is supplied to the word data separation unit 103.

The word data separation section 103 uses the synchronization data detection output signal SWS from the synchronization data detection / S / P conversion section 101 to add an additional word data group from the composite 8-bit word string data DZ (8). DW
S is separated and the composite 8-bit word string data DZ
The 8-bit word string data DM (8) whose word transmission rate based on (8) is 125 MBps and the additional word data group DWS are separated from each other and taken out.

As a result, the word transmission rate obtained from word data separation section 103 is set to 125 MBps.
The bit word string data DM (8) is
4 and the additional word data group DWS obtained from the word data separation unit 103 is also supplied to the data restoration unit 104.

In data restoration section 104, 8-bit word string data DM from word data separation section 103 is output.
(8) is supplied to the movable contact 106 a of the switch 106, and the additional word data group DWS from the word data separating unit 103 is supplied to the control signal forming unit 105.
Supplied to The control signal forming unit 105 includes a clock pulse signal CA having a frequency of 3.64525 MHz and a clock pulse signal CC having a frequency of 125 MHz.
Is also supplied.

Movable contact 106 to which 8-bit word string data DM (8) is supplied from word data separating section 103
a, the control signal forming unit 105
Is supplied as well. Control signal CDV
Are formed in the control signal forming section 105 according to the additional word data group DWS from the word data separating section 103, and are obtained from the word data separating section 103.
Each predetermined period D in the bit word string data DM (8)
Synchronized with the V portion.

The switch 106 is connected to the control signal forming unit 105
The movable contact 106a according to the control signal CDV from
The selection contact 1 is set for each period segment corresponding to the predetermined period DV portion.
06b and the selection contact 106c are alternately connected. The selection contact 106b of the switch 106 is connected to the memory units 111A, 112A and 113A, and the selection contact 106c of the switch 106 is connected to the memory unit 111A.
B, 112B and 113B are connected.

Accordingly, switch 106 converts 8-bit word string data DM (8) from word data separation section 103 into DV sections for a predetermined period of time in each of memory sections 111A to 113A, and , To the memory units 111B to 113B.

Write control signals QW1O and QW2O from control signal forming section 105 are provided in memory sections 111A to 113A.
And QW3O are supplied respectively, and the memory unit 111B
To 113B are supplied with write control signals QW1E, QW2E and QW3E from the control signal forming unit 105, respectively. Each of the write control signals QW1O to QW3O and QW1E to QW3E obtained from the control signal forming unit 105 is formed based on the clock pulse signal CC and has a frequency of 125 MHz. The output timing from the word data separation unit 105 is determined according to the additional word data group DWS.
In (8), control is performed in accordance with the timing set in advance corresponding to the data synthesis mode of the DV portion for each predetermined period.

In this case, the writing in each of the memory units 111A to 113A and the writing in each of the memory units 111B to 113B are alternately performed for each period section corresponding to each predetermined period DV portion in which the control signal CDV is synchronized. Done. Then, in each of the period divisions corresponding to every other predetermined period DV portion, the 8-bit word string data DM (8) is output in accordance with the transmission timing of the write control signals QW1O to QW3O from the control signal forming section 105. ), The 8-bit word string data D1O (8), D2O (8) and D3O constituting the first part of the DV part for a predetermined period of time.
(8) are written together in the memory units 111A to 113A, respectively. In addition, every other predetermined period DV
In each of the period divisions corresponding to the portion, the 8-bit word string data D is output in accordance with the respective transmission timings of write control signals QW1E to QW3E from control signal forming section 105.
8-bit word string data D1E (8), D2E constituting a second part of the DV part for a predetermined period of M (8)
(8) and D3E (8) correspond to the memory units 111B to 111B, respectively.
113B.

Further, read control signal QR from control signal forming section 105 is applied to each of memory sections 111A-113A.
O, and the read control signal QR from the control signal forming unit 105 is supplied to each of the memory units 111B to 113B.
E is supplied. The read control signal QRO has a frequency of 3.64525 MHz based on the clock pulse signal CA.
In response to WS, control signal forming section 105 transmits the 8-bit word string data DM (8) from word data separating section 103 in synchronization with the first part of the DV section for a predetermined period of time, and read control signal QRE. Is based on the clock pulse signal CA and has a frequency of 3.64525 MHz.
In accordance with the additional word data group DWS, the control signal forming unit synchronizes with the second portion in the predetermined period DV portion of the 8-bit word string data DM (8) from the word data separating unit 103. 105
Sent from.

Thus, in the period division corresponding to every other predetermined period DV portion, memory units 111A to 111A
8-bit word string data D1O respectively written in 3A
(8) to D3O (8) are in accordance with the read control signal QRO in the period section corresponding to the next predetermined period DV portion.
These are read from the memory units 111A to 113A, respectively. At this time, each of the 8-bit word string data D1O (8) to D3O (8) written in the memory units 111A to 113A has a word transmission rate of 3.664525 MBp corresponding to the frequency 3.64525 MHz of the read control signal QRO.
s is read as forming 8-bit word string data, and 8-bit word string data D1O (8) to D3O are read from the memory units 111A to 113A, respectively.
The word transmission rate is 3.64525M based on (8).
Readout outputs S1O, S2O and S3O are obtained as 8-bit word string data at bps.

In the period division corresponding to every other predetermined period DV, the memory units 111B to 113B
8-bit word string data D1E respectively written in B
(8) to D3E (8) are in accordance with the read control signal QRE in a period section corresponding to the next predetermined period DV portion.
These are read from the memory units 111B to 113B, respectively. At this time, 8-bit word string data D1E (8) to D3E (8) read from the memory units 111B to 113B, respectively.
Have a word transmission rate of 3.64525 MB corresponding to the frequency of 3.64525 MHz of the read control signal QRE.
It is assumed that 8-bit word string data of ps is formed. Based on the 8-bit word string data D1E (8) to D3E (8) from the memory units 111B to 113B, respectively.
Readout outputs S1E, S2E and S3E are obtained as 8-bit word string data with a word transmission rate of 3.64525 Mbps.

Readout output S obtained from memory unit 111A
1O and read output S1E obtained from memory unit 111B are provided to switch 115, read output S2O obtained from memory unit 112A and read output S2E obtained from memory unit 112B are provided to switch 116, and read output obtained from memory unit 113A. S3O and the read output S3E obtained from the memory unit 113B are supplied to the switch 117, respectively.

Each of the switches 115 to 117 is also supplied with a control signal CSV from the control signal forming unit 105.
The control signal CSV is synchronized with the control signal CDV.

The switch 115 takes out the readout output S1O and the readout output S1E alternately according to the control signal CSV, and outputs the MPEG image information data DCP1 which is a series of 8-bit word string data and has a word transmission rate of 3.664525 MBps. Reproduce. Similarly, switch 116
And 117 alternately take out the readout outputs S2O and S2E and S3O and S3E, respectively, according to the control signal CSV, and form a series of 8-bit word string data, the MPEG image information data DCP2 and the MPEG image information data DCP2 having a word transmission rate of 3.64525 MBps. Play DCP3.

In this way, the switches 115 to 117
Are transmitted from the data restoring unit 104.

In the example of the data transmission method implemented using the example of the data transmission apparatus shown in FIG. 1 or FIG. 10, for example, 7-channel or 3-channel MPEG image information data is multiplexed and transmitted. The data to be multiplexed is not limited to the MPEG image information data, but may be digital video data or video and audio data subjected to other data compression. The number of channels of multiplexed data is not limited to seven or three, but may be any number.

[0146]

As is apparent from the above description, the data transmission method according to any one of claims 1 to 8 in the claims of the present application is, for example, described in the claims. A plurality of MPEG image information data or data equivalent to the plurality of MPEG image information data as in the data transmission method according to the invention described in 2 or 3; Word string data obtained by writing and reading from a plurality of memory means for video and audio signal data and an additional word data group including specific word synchronization data are synthesized. 8B to the composite 8-bit word string data
The composite 10-bit word string data formed by being subjected to the / 10B conversion process and transmitted to be converted into serial data includes 10-bit word synchronization data having a predetermined positive or negative RD. RD of the 10-bit word synchronization data
Depends on whether the word synchronization data detection on the receiving side is to detect only word synchronization data with RD being positive or only word synchronization data with RD being negative. Set to positive or negative.

Therefore, either the case where the receiving side detects the word synchronous data by detecting only the word synchronous data whose RD is positive, or the case where it detects only the word synchronous data whose RD is negative is detected. Under the circumstances, on the receiving side, 10-bit word synchronous data is appropriate as word synchronous data required for processing for reproducing data that has been subjected to data compression such as a plurality of MPEG image information data. The 10-bit word string data included in the composite 10-bit word string data is 8B / 1
By being obtained through the 0B conversion process,
This will result in good transmission quality. Therefore, on the receiving side, a plurality of Ms based on the received composite 10-bit word string data can be obtained while obtaining good transmission quality.
A state is ensured in which a data synchronization state required for a process for reproducing data that has been subjected to data compression such as PEG image information data is reliably obtained.

According to the data transmission method according to any one of the first to eighth aspects of the present invention, RD is set to a predetermined positive or negative value. Conversion of composite 10-bit word string data with an additional word data group including 10-bit word synchronization data to serial data, transmission of the converted serial data, and further, reception and reception of the serial data on the receiving side Conversion of serial data to composite 10-bit word string data and the like can be performed using, for example, a transmission circuit device used for transmission and reception of a digital video signal under a fiber channel system. 8-bit word string data including word synchronization data is formed based on the power data, 8-bit word sequence data of 8B /
A digital video signal data or a plurality of data-compressed digital video signal data, for example, a plurality of MPEG image information data, which are transmitted to be transmitted after being converted into 10-bit word string data by the 10B conversion process. In addition, the audio signal data can be transmitted so that it can be reliably reproduced on the receiving side by using means that can be prepared relatively easily.

In the data transmission apparatus according to the ninth aspect of the present invention, the data transmission means converts the data into serial data and transmits the serial data. Word string data obtained by performing writing to and reading from a plurality of memory means for a plurality of digital video signal data or video and audio signal data to be obtained, and specific word synchronization data. The combined 10-bit word string data obtained by combining the included additional word data group and the combined 8-bit word string data is formed by performing 8B / 10B conversion processing, converted into serial data, and transmitted to be transmitted. The bit word string data includes RD
Of the 10-bit word synchronization data having a predetermined positive or negative value. The RD of the 10-bit word synchronization data is determined by the word synchronization data detection on the receiving side. Depending on whether only synchronous data is detected or only word synchronous data with negative RD is detected,
It is set to positive or negative in advance.

Therefore, either the case where the receiving side detects the word synchronous data by detecting only the word synchronous data whose RD is positive or the case where the receiving side detects only the word synchronous data whose RD is negative is detected. Under the circumstances, on the receiving side, 10-bit word synchronous data is appropriate as word synchronous data required for processing for reproducing data that has been subjected to data compression such as a plurality of MPEG image information data. The 10-bit word string data included in the composite 10-bit word string data is 8B / 1
By being obtained through the 0B conversion process,
This will result in good transmission quality. Therefore, on the receiving side, a plurality of Ms based on the received composite 10-bit word string data can be obtained while obtaining good transmission quality.
A state is ensured in which a data synchronization state required for a process for reproducing data that has been subjected to data compression such as PEG image information data is reliably obtained.

According to the data transmission apparatus of the ninth aspect of the present invention, the RD is set to a predetermined positive or negative value.
Conversion of composite 10-bit word string data to serial data with an additional word data group including bit word synchronization data, transmission of the converted serial data, reception of serial data on the receiving side, reception of serial data The conversion of data into complex 10-bit word string data and the like can be performed using, for example, a transmission circuit device used for transmitting and receiving a digital video signal under a fiber channel system. Based on the data, 8-bit word string data including word synchronization data is formed, and the 8-bit word string data is converted into 10 bits by 8B / 10B conversion processing.
For example, a plurality of digital video signal data or video and audio signal data subjected to a plurality of data compression, which are a plurality of MPEG image information data, are transmitted according to a transmission method that is transmitted after being converted into bit word string data. It can be transmitted so that it can be reliably reproduced on the receiving side using means that can be arranged relatively easily.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a data transmission method according to an embodiment of the present invention; FIG. 2 is a block diagram illustrating an example of a data transmission device according to the described invention.

FIG. 2 is a time chart for explaining an example of a data transmission method according to any one of claims 1 to 8 in the claims of the present application.

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

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 to 8 in the claims of the present application.

FIG. 5 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

FIG. 6 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

FIG. 7 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

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

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

FIG. 10 is a view showing another embodiment of the data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application; FIG. 10 is a block diagram showing another example of the data transmission device according to the invention described in FIG. 9.

FIG. 11 is a time chart for explaining another example of the data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

FIG. 12 is a time chart for explaining another example of the data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

FIG. 13 is a time chart for explaining another example of the data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

FIG. 14 shows an example of a data receiving apparatus that receives a transmission signal transmitted according to an example of the data transmission method according to any one of claims 1 to 8 in the claims of the present application. It is a block block diagram.

FIG. 15 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 14;

FIG. 16 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 14;

FIG. 17 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 14;

FIG. 18 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 14;

FIG. 19 shows an example of a data receiving apparatus for receiving a transmission signal transmitted according to another example of the data transmission method according to any one of claims 1 to 8 in the claims of the present application. FIG. 3 is a block diagram showing the configuration.

FIG. 20 is a conceptual diagram used to explain a “frame” used in transmitting digital data.

FIG. 21 is a conceptual diagram serving to explain word synchronization data used in transmitting digital data.

[Explanation of symbols]

11, 41... Composite 8-bit word string data forming unit,
12-18, 42-44 ... switch, 19, 4
5. Control signal forming unit, 21A to 27A, 21B
27B, 29, 51A to 53A, 51B to 53B, 55
... Memory unit, 30A, 30B, 31, 56A, 5
6B, 57... Data set, 32, 58.
B / 10B converter, 33, 59 ... P / S converter,
34, 60... Transmission signal forming unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/30 H04N 7/133 Z F-term (Reference) 5C059 KK00 MA00 RB01 RC02 SS06 UA02 UA32 UA34 5K028 AA06 AA11 BB08 EE03 KK23 MM10 MM16 SS06 SS24 5K029 AA18 BB01 CC04 DD02 EE06 EE18 GG03 GG07 LL17 5K047 AA16 BB02 CC02 DD01 DD02 HH03 HH12 HH42 LL04 MM02 MM24

Claims (9)

[Claims] 1. A plurality of digital video signal data or video and audio signal data, each of which has been subjected to data compression, is written into a plurality of memory means for each predetermined period and stored in a plurality of memory means. The period divisions written in each of the memory means are sequentially read as 8-bit word string data, and a plurality of 8-bit word string data respectively read from the plurality of memory means and an 8-bit word data having a preset code are read. Is combined with the additional word data group including the specified word synchronization data to form composite 8-bit word string data into which the additional word data group is inserted at a predetermined word interval. The column data is subjected to an 8-bit / 10-bit conversion process, and based on the specific word synchronization data. Forming composite 10-bit word string data having a portion based on the additional word data group, including the resulting 10-bit word synchronization data having a predetermined positive or negative running disparity, A data transmission method for converting bit word string data into serial data and transmitting the serial data for transmission. 2. The data transmission according to claim 1, wherein each of the plurality of digital video signal data or video and audio signal data is digital image information data that has been subjected to data compression by high-efficiency coding. Method. 3. A method according to claim 1, wherein each of the plurality of digital video signal data or video and audio signal data is digital image information data forming 8-bit word string data obtained by performing data compression by high efficiency coding. The data transmission method according to claim 2, wherein: 4. An additional word data group is selected as a part of the composite 10-bit word string data based on the additional word data group, which includes 10-bit word synchronous data having a positive running disparity. 3. The method according to claim 1, wherein
Or the data transmission method according to 3. 5. An additional word data group is selected as a part based on the additional word data group in the composite 10-bit word string data, which includes 10-bit word synchronous data having a negative running disparity. 3. The method according to claim 1, wherein
3. The data transmission method according to 3. 6. The supplementary word data group includes auxiliary word data. When the auxiliary word data is converted into a 10-bit word, the auxiliary word data is converted into 10-bit word data having a running disparity of neutral. 2. The method of claim 1, wherein
The data transmission method according to any one of claims 1 to 5. 7. An 8-bit word data immediately before an 8-bit word synchronous data which is converted into a 10-bit word synchronous data when the additional word data group is converted into a 10-bit word, is converted into a 10-bit word. 5. The data transmission method according to claim 4, wherein the running disparity of the 10-bit word is set to be negative immediately after the execution. 8. An 8-bit word data immediately before an 8-bit word synchronous data which is converted to a 10-bit word synchronous data when the additional word data group is converted into a 10-bit word, is converted into a 10-bit word. 6. The data transmission method according to claim 5, wherein the running disparity of the 10-bit word is selected to be set to be positive immediately after the execution. 9. A plurality of digital video signal data or video and audio signal data, each of which has been subjected to data compression, is written into a plurality of memory means for each predetermined period and stored in a plurality of memory means. The period divisions written in each of the memory means are sequentially read as 8-bit word string data, and a plurality of 8-bit word string data respectively read from the plurality of memory means and an 8-bit word data having a preset code are read. 8 bit word string data formation for forming composite 8-bit word string data into which the additional word data group is inserted at a predetermined word interval by combining the added word data group including the specified word synchronization data. Means; and a composite 8 obtained from the 8-bit word string data forming means.
Including 10-bit word synchronization data having a running disparity of a predetermined positive or negative predetermined value obtained by performing an 8-bit / 10-bit conversion process on the bit word string data and based on the specific word synchronization data;
8 bits / 10 to form composite 10-bit word string data having a portion based on the additional word data group
Bit conversion means, and a composite 10 obtained from the 8-bit / 10-bit conversion means
A data transmission means for converting bit word string data into serial data and transmitting the serial data for transmission.