JP2001177488A - Data transmission method and data transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transmission system that employs a comparatively easily prepared means to apply 8B/10B conversion to compressed data in a way that a receiver side can surely recover the data and that applies P/S conversion to the converted data and then transmits the resulting data. SOLUTION: Data by each prescribed period of a plurality of DV format image information data are written in a plurality of memory means, the data by each prescribed period written respectively in each of a plurality of the memory means are sequentially read as 8-bit word stream data, a plurality of the read 8-bit word stream data and attached word data groups including specific word synchronous data are combined to generate a composite 8-bit word stream where the additional word data group is inserted in them at a prescribed word interval, a P/S conversion section incorporating a 8B/10B conversion section applies 8B/10B conversion to the composite 8-bit word stream to generate composite 10-bit word streams data including 10-bit synchronous data on the basis of the specific word synchronous data, the composite 10-bit word stream data are converted into serial data and then the serial data are transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The invention described in the claims of the present application combines digital video signal data or video and audio signal data subjected to data compression with an additional word data group including 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, further convert the data into serial data, and transmit the serial data. The present invention relates to a data transmission method for transmitting data 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 at the transmission side into, for example, 10 bits every 8 bits, and the conversion table is prepared in advance. , And is converted to 10-bit word string data by performing an 8-bit / 10-bit conversion (8B / 10B conversion). And what is actually transmitted is 8B
The 10-bit word string data formed by performing the / 10B 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 word string data is converted into 8-bit data every 10 bits, and a 10-bit / 8-bit conversion (10B / 8B conversion) is performed in which the conversion is performed according to a conversion table prepared in advance. Is done. Thus 10B /
The original digital data is reproduced from the word string data formed by performing the 8B conversion.

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

Digital data transmitted as 10-bit word string data under a digital data transmission system such as a fiber channel system is referred to as a "frame" as shown in FIG. 16, for example. It follows the data format in which the smallest independent packet is formed. The "frame" shown in FIG. 16 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. 17 shows 10-bit word data D called by a code name of K28.5.
S10, and the 10-bit word data DS10
Is "001" when 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 system called the MPEG system has been proposed.

A DV format method has been proposed in which image information data based on a television signal or the like is compressed using DCT (Discrete Cosine Transform), which is a transform coding method employed in the MPEG method. . In the DV format, the number of lines in one frame is 525 and the field frequency is 60 Hz.
Or, a standard television signal in which the number of lines in one frame is 625 and the field frequency is 50 Hz,
The SD specification DV format system applied to the digitalization of the above, and the field frequency is 60 Hz with the number of lines in one frame being 1,125 lines, or the field frequency is 50 Hz with the number of lines in one frame being 1,250 lines. There is an HD specification DV format system applied to digitization of a high definition television (HDTV) signal.

In such MPEG system, DV format system, etc., image information data is subjected to data compression by high-efficiency coding. However, the MPEG system, DV format system, etc. for image information data are used. When data compression is performed by high-efficiency encoding according to the above, it is possible to realize data compression at an extremely high compression rate, and to perform high-quality reproduction of an image reproduced based on the image information data subjected to data compression. There are advantages that can be achieved. Therefore, in the field of business or home electronic devices such as digital video cameras and digital video tape recorders, image information data (M
PEG image information data) or image information data (DV format image information data) that has been subjected to data compression by high-efficiency encoding in accordance with the DV format has tended to increase.

In the transmission of such MPEG image information data, DV format image information data, etc., the transmission side, as described above, transmits 8-bit word string data including word synchronization data based on the data to be transmitted. And the 8-bit word string data is 8B / 10B
Conversion into 10-bit word string data by conversion, and further conversion to serial data and transmission are performed. For example, an existing integrated circuit element (IC element ) Is desired from the viewpoint of effective use of

[0015]

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
MPE with a transmission system which is converted to bit word string data and further converted to serial data and transmitted
With the desire to transmit G image information data, DV format image information data, etc., not only one MPEG image information data, DV format image information data, etc., but also a plurality of MPEG image information data, DV format images, etc. If information data and the like can be transmitted in a multiplexed manner, efficient use of MPEG image information data, DV format image information data, and the like is achieved.
The range of use of PEG image information data, DV format image information data, and the like can be expanded. And M
Efficient use of PEG image information data, DV format image information data, or the like, or expansion of the use range of MPEG image information data, DV format image information data, etc., is, for example, in the field of business or home electronic devices. This will result in further development of technology.

However, conventionally, on the transmitting 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
A transmission system capable of transmitting one or a plurality of MPEG image information data, DV format image information data, and the like by using a transmission method that is converted into bit word string data and further converted into serial data and transmitted. No specific examples are found. Further, there is no document describing a technique relating to a transmission system capable of transmitting MPEG image information data, DV format image information data, and the like.

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 formed. 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 transmission method is converted into bit word string data, and further converted into serial data and transmitted to be transmitted, for example, one or more MPEG image information data, DV format image information data, and the like.
Provided are a transmission method capable of transmitting digital video signal data or video and audio signal data subjected to one or a plurality of data compression, and a data transmission device provided for carrying out the method.

[0018]

The data transmission method according to any one of claims 1 to 3 in the claims of the present application provides compressed digital video signal data or video and audio data. For signal data, predetermined period divisions are alternately written to the first and second memory means, and the period divisions written to the first and second memory means are sequentially written as 8-bit word string data. N (N is a positive number) double-speed reading, and 8-bit word string data respectively read from the first and second memory means and specific word synchronization data which is 8-bit word data having a preset code. A composite 8-bit in which the additional word data group is inserted at predetermined word intervals by combining the The word string data is formed, and the combined 8-bit word string data is subjected to 8B / 10B conversion using P / S conversion means having a built-in 8B / 10B conversion processing means, and is obtained based on specific word synchronization data. ,
Form composite 10-bit word string data having a portion based on an additional word data group, including 10-bit word synchronization data having a predetermined positive or negative RD, and converting the composite 10-bit word string data into serial data And transmitted for transmission.

The data transmission method according to any one of claims 4 to 9 in the claims of the present application provides a method for transmitting a plurality of compressed digital video signal data or video and audio signal data. about,
Each predetermined period segment is written to a plurality of memory means, and the period segments written to each of the plurality of memory means are sequentially read as 8-bit word string data, and a plurality of 8th word sections respectively read from the plurality of memory means are read. Bit word string data is combined with an additional word data group including specific word synchronization data which is converted into 8-bit word data having a preset code, and the additional word data group is inserted at predetermined word intervals. To form the composite 8-bit word string data
The bit word string data is subjected to 8B / 10 conversion using P / S conversion means having a built-in 8B / 10B conversion processing means, and RD obtained based on the specific word synchronization data is set to a predetermined positive or negative value. Forming composite 10-bit word string data having a portion based on the additional word data group, including 10-bit word synchronization data
The composite 10-bit word string data is converted into serial data and transmitted for transmission.

On the other hand, the data transmission apparatus according to the invention described in claim 10 in the claims of the present application provides the compressed digital video signal data or video and audio signal data by dividing a predetermined period division into first periods. And alternately writing to the second memory means, and sequentially reading out the period divisions written to the first and second memory means as 8-bit word string data at N (N is a positive number) double-speed reading, By combining 8-bit word string data respectively read from the first and second memory means, and an additional word data group including specific word synchronization data as 8-bit word data having a preset code, 8-bit data forming compound 8-bit word string data into which additional word data groups are inserted at predetermined word intervals The combined 8-bit word string data obtained from the word string data forming means and the 8-bit word string data forming means is supplied, and the combined 8-bit word string data is subjected to 8B / 10B conversion, and based on the specific word synchronization data. Having a portion based on an additional word data group, including 10-bit word synchronization data having a predetermined positive or negative RD.
8B that forms bit word string data and converts composite 10-bit word string data into serial data.
P / S conversion means incorporating a / 10B conversion processing means;
And transmitting means for transmitting serial data obtained from the P / S conversion means having a built-in B / 10B conversion processing means.

Further, in the data transmission apparatus according to the present invention described in claim 11 of the present application, each of the plurality of compressed digital video signal data or video and audio signal data has a predetermined period division Are written into a plurality of memory means, and 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 are provided. A composite 8-bit word in which the additional word data group including the specific word synchronization data and the additional word data group including the specific word synchronization data are combined with a predetermined code and the additional word data group is inserted at a predetermined word interval. 8-bit word string data forming means for forming string data;
A 10-bit word synchronization that performs 8B / 10B conversion on the composite 8-bit word string data obtained from the 8-bit word string data forming means and has a predetermined positive or negative RD obtained based on the specific word synchronization data A PB incorporating 8B / 10B conversion processing means for forming composite 10-bit word string data having a portion based on an additional word data group including data and converting the composite 10-bit word string data into serial data
/ S conversion means, and transmission means for transmitting serial data obtained from the P / S conversion means incorporating the 8B / 10B conversion processing means for transmission.

In the data transmission method according to any one of the first to third aspects of the present invention, the MPEG image information data and the DV format image information data Etc.,
Data compressed digital video signal data or video and audio signal data is written to the first and second memory means and read out at N times speed from the first and second memory means. The composite 8-bit word string data obtained by combining the 8-bit word string data and the additional word data group containing the specific word synchronization data is converted into 8B / 10B data by P / S conversion means incorporating 8B / 10B conversion processing means. When the data is transmitted after being converted into / 10B and serial data, 8B / 1
The composite 10-bit word string data obtained by subjecting the composite 8-bit word string data to 8B / 10B conversion by the P / S conversion means having a built-in 0B conversion processing means includes 10 bits in which RD is predetermined positive or negative. Word synchronization data will be included. Such 10-bit word synchronization data is, for example, + K28.5 which is the word data DS10 having the positive RD, or -K28.5 which is the word data DS10 having the negative RD. Depending on whether the word synchronization data detection on the side detects only word synchronization data having RD as positive or only word synchronization data having RD as negative, Set to negative.

In the data transmission method according to any one of the fourth to ninth aspects of the present invention, a plurality of MPEG image information data, DV format image information data, Etc.,
8-bit data obtained by writing to and reading from a plurality of memory means for a plurality of digital video signal data or video and audio signal data, each of which has been subjected to data compression. The combined 8-bit word string data obtained by synthesizing the word string data and the additional word data group including the specific word synchronizing data is converted into 8B / 10B data by the P / S conversion means incorporating the 8B / 10B conversion processing means. When conversion and conversion to serial data are performed and transmitted, 8B /
The composite 10-bit word string data obtained by subjecting the composite 8-bit word string data to 8B / 10B conversion by the P / S conversion means having a built-in 10B conversion processing means includes a 10-bit RD with a predetermined positive or negative RD. Word synchronization data will be included. Such 10-bit word synchronization data is also, for example, + K28.5 which is word data DS10 having RD positive or −K28.5 which is word data DS10 having RD negative.
The RD indicates that the word synchronization data detection on the receiving side is
It is set to be positive or negative in advance depending on whether only the word synchronous data with RD being positive is detected or only the word synchronous data with RD being negative is detected.

According to the data transmission method according to any one of claims 1 to 3 or 4 to 9 in the claims of the present application, the data is converted into serial data. Composite 10 to be sent
The bit word string data is used when the receiving side performs word synchronization data detection by detecting only word synchronization data with RD being positive or by detecting only word synchronization data with RD being negative. In any case, on the receiving side, 10-bit word synchronous data is required for processing for reproducing data that has been subjected to data compression, such as MPEG image information data and DV format image information data. It is assumed that the word synchronization data is properly detected. Also, 1 included in the composite 10-bit word string data
Since the 0-bit word string data is obtained through the 8B / 10B conversion processing, good transmission quality is provided. Therefore, on the receiving side, data compression such as MPEG image information data, DV format image information data, etc., based on the received composite 10-bit word string data is performed under the condition that good transmission quality is obtained. A state in which the data synchronization state required for the processing for reproducing the data on which the data synchronization is performed can be reliably obtained.

According to the data transmission method according to any one of claims 1 to 3 or claims 4 to 9 in the claims of the present application, the composite 8 8 for bit word string data
B / 10B conversion and conversion into serial data, transmission of the converted serial data, reception of serial data, conversion of received serial data into composite 8-bit word string data on the receiving side, and the like. For example, it can be performed using an integrated circuit device used for transmitting and receiving a digital video signal under a fiber channel system. 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. For example, one or a plurality of MPEG image information data, DV, and the like are converted into 10-bit word string data including 10-bit word synchronization data and further transmitted to be converted into serial data and transmitted. It is possible to transmit digital video signal data or video and audio signal data subjected to one or more data compression, such as format image information data.

Further, in the data transmission apparatus according to the invention set forth in claim 10 of the present application, the first and second digital video signal data or the video and audio signal data subjected to the data compression are provided. Word string data obtained by performing writing to the second memory means and reading at N times speed from the first and second memory means is combined with an additional word data group including specific word synchronization data. The obtained composite 8-bit word string data is converted to a P with a built-in 8B / 10B conversion processor.
The composite 1 is formed by being subjected to 8B / 10B conversion by the / S conversion means, converted into serial data by the P / S conversion means having the built-in 8B / 10B conversion processing means, and transmitted.
The 0-bit word string data includes 10-bit word synchronization data that sets RD to a predetermined positive or negative value. Such 10-bit word synchronization data is, for example, word data DS10 with RD being positive.
+ K28.5 or −K28.5 which is the word data DS10 having a negative RD. And
The RD of the 10-bit word synchronization data included in such 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 whether the RD is negative. Is set in advance to be positive or negative depending on whether only the word synchronization data to be detected is detected.

In the data transmission apparatus according to the eleventh aspect of the present invention, a plurality of digital video signal data or video and audio data each of which is subjected to data compression. A word string data obtained by writing to a plurality of memory means and reading from a plurality of memory means with respect to signal data, and an additional word data group including specific word synchronization data are synthesized and obtained. P with built-in 8B / 10B conversion processing means
The composite 1 is formed by being subjected to 8B / 10B conversion by the / S conversion means, converted into serial data by the P / S conversion means having the built-in 8B / 10B conversion processing means, and transmitted.
The 0-bit word string data includes 10-bit word synchronization data that sets RD to a predetermined positive or negative value. Such 10-bit word synchronization data is, for example, word data DS10 with RD being positive.
+ K28.5 or −K28.5 which is the word data DS10 having a negative RD. And
The RD of the 10-bit word synchronization data included in the composite 10-bit word string data is determined whether the detection of the word synchronization data on the receiving side detects only the word synchronization data whose RD is positive, or that the RD is negative. It is set to positive or negative in advance depending on whether only the word synchronization data to be detected is detected.

The composite 10-bit word string data transmitted as serial data by the data transmission device according to the invention set forth in claim 10 or 11 of the present application is transmitted on the receiving side by word synchronization. In either case where data detection is performed by detecting only word synchronous data with RD being positive or only by detecting word synchronous data with RD being negative, the receiving side , 10-bit word synchronous data is MPEG image information data, DV
It is to be properly detected as word synchronization data required for processing for reproducing data that has been subjected to data compression, such as format image information data. Further, the 10-bit word string data included in the composite 10-bit word string data is obtained through the 8B / 10B conversion processing, thereby providing good transmission quality. Therefore, on the receiving side,
Under the condition that good transmission quality is obtained, the received composite 10
A state in which a data synchronization state required for a process for reproducing data that has been subjected to data compression, such as MPEG image information data and DV format image information data, based on bit word string data, is reliably obtained. Is done.

According to the data transmission apparatus of the present invention as set forth in claim 10 or claim 11, 8B / 10B conversion of composite 8-bit word string data and conversion to serial data are performed. ,
The transmission of the converted serial data and the reception of the serial data on the receiving side, the conversion of the received serial data into composite 8-bit word string data, and the like are performed, for example, under a fiber channel system. This can be performed by using an integrated circuit device used for transmitting and receiving a digital video signal. 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
For example, one or a plurality of MPEG image information data, DV, and the like are converted into 10-bit word string data including bit word synchronization data, and further converted into serial data and transmitted to be transmitted.
It is possible to transmit digital video signal data or video and audio signal data subjected to one or more data compression, such as format image information data.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention in which an example of a data transmission method according to the present invention is implemented. An example of the data transmission device according to the invention described in claim 11 in the range of FIG.

In the example shown in FIG. 1, a plurality of digital video signal data or video and audio signal data, each of which has been subjected to data compression.
Channel HD specification DV format image information data (hereinafter simply referred to as DV format data) DCP
1, DCP2, DCP3, DCP4,..., DC
P20 is supplied to the composite 8-bit word string data forming unit 10. 20 channel DV format data D
Each of CP1 to DCP20 forms 8-bit word string data (bit transmission rate is 50 Mbps) with a word transmission rate of, for example, 6.25 MBps.

In the composite 8-bit word string data forming unit 10, DV format data DCP1 to DCP2
0 is switch 11, 12, 13, 14, ..., 3
0 respectively. Each of the switches 11 to 30 has
The control signal CSV from the control signal forming unit 52 is also supplied.

In the control signal forming section 52, the vertical synchronizing signal SSV synchronized with the vertical synchronizing period for each of the DV format data DCP1 to DCP20 and the frequency are set to 6.2.
5 MHz clock pulse signal CA and frequency 1
A clock pulse signal CB having a frequency of 25 MHz is supplied. The control signal CSV obtained from the control signal forming unit 52 is obtained based on, for example, the vertical synchronization signal SSV, and corresponds to a vertical synchronization period for each of the DV format data DCP1 to DCP20 or a predetermined period corresponding to an integral multiple thereof. This is synchronized with the period TT.

The switch 11 includes a memory section 31A and a memory section 31B, the switch 12 includes a memory section 32A and a memory section 32B, the switch 13 includes a memory section 33A and a memory section 33B, and the switch 14 includes a memory section. The unit 34A and the memory unit 34B are connected to each other. The switch 30 is connected to the memory unit 50A and the memory unit 50B.

The switch 11 to which the DV format data DCP1 is supplied converts the DV format data DCP1 into, for example, the control signal CSV in response to the control signal CSV.
Are alternately supplied to the memory unit 31A and the memory unit 31B for a predetermined period TT at which the data is synchronized with each other, so that every other predetermined period TT in the DV format data DCP1.
Are stored in the memory unit 31 respectively.
A and 31B are separately supplied. Similarly, the switches 12 to 30, to which the DV format data DCP2 to DCP20 are respectively supplied, convert the DV format data DCP2 to DCP20 into, for example, the memory units 32A to 50A and the memory units 32A to 50A for a predetermined period TT in response to the control signal CSV. 32B
, And an odd predetermined period corresponding to every other predetermined period TT in the DV format data DCP2 to DCP20 and an even predetermined period corresponding to another every other predetermined period TT. The divisions are distributed to the memory units 32A to 50A and 32B to 50B, respectively.

A write control signal QWO from a control signal forming unit 52 is supplied to each of the memory units 31A to 50A.
Further, a write control signal QWE from the control signal forming unit 52 is supplied to each of the memory units 31B to 50B. The write control signal QWO is formed based on the clock pulse signal CA, has a frequency of 6.25 MHz, and synchronizes with the odd predetermined period division of each of the DV format data DCP1 to DCP20.
The write control signal QWE is also formed based on the clock pulse signal CA and has a frequency of 6.25.
MHz and DV format data DCP1 to DCP
The control signal forming section 52 sends out the signals in synchronization with the even-numbered predetermined period divisions for each of the twenty.

Thus, the DV format data DC
Each of the odd predetermined period sections in P1 is sequentially written into the memory unit 31A in response to the write control signal QWO, and
Each even-numbered predetermined period section in the DV format data DCP1 is sequentially written to the memory unit 31B according to the write control signal QWE. Similarly, each odd predetermined period segment in the DV format data DCP2 to DCP20 is
The write control signals QW are sequentially written to the memory units 32A to 50A in accordance with the write control signal QWO, and the even-numbered predetermined period divisions in the DV format data DCP2 to DCP20 are respectively written to the memory units 32B to 50B.
The data is sequentially written according to E.

Therefore, as shown in FIG. 2A, the writing in the memory units 31A to 50A and the writing in the memory units 31B to 5B
The writing in 0B is performed alternately by the predetermined period TT. In FIG. 2A, an arrow t indicates an elapsed time.

The composite 8-bit word string data forming unit 10 includes a memory unit 51 in addition to the memory units 31A to 50A and 31B to 50B. The memory unit 51 has 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 into 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 by "011 10101" as shown in FIG. 3, and is converted into 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 memory 31A includes a control signal generator 52
, And a read control signal QR1E from the control signal forming unit 52 is supplied to the memory unit 31B. Similarly, the memory units 32A to 32A
A indicates the read control signals QR2O to QR0 from the control signal forming unit 52.
QR20O are supplied, respectively, and the memory units 32B-5
0B, the read control signal QR2E from the control signal forming unit 52
To QR20E. Further, the memory unit 51
The read control signal QRWS from the control signal forming unit 52
Is supplied.

The read control signals QR1O and QR1E to QR20O and QR20E obtained from the control signal forming section 52
Further, each of the QRWSs is formed based on the clock pulse signal CB, the frequency is set to 125 MHz, and the transmission state from the control signal forming unit 52 is set to the vertical synchronization signal SS.
Controlled by V.

The D written in the memory 31A is
Each odd-numbered predetermined period section of the V format 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 DV format data DCP1 written in the memory unit 31B is read control signal QR.
8 bits are read out according to 1E. Similarly, each odd-numbered predetermined period section of the DV format data DCP2 to DCP20 written in the memory units 32A to 50A is read out by 8 bits in accordance with the read control signals QR2O to QR20O, and written to the memory units 32B to 50B, respectively. DV format data DCP2 to DCP2
0, each even-numbered predetermined period section is a read control signal QR2E.
8 bits are read in accordance with .about.QR20E. Further, the additional word data group DWS stored in the memory unit 51 is read in accordance with the read control signal QRWS with the word transmission rate set to 125 MBps.

At this time, the memory units 31A to 50A and 3
As shown in FIG. 2B, reading from the memory units 31B to 50B and reading from the memory unit 3B are performed.
Reading from 1A to 50A is alternately performed for a predetermined period TT. In FIG. 2B as well, the arrow t indicates the elapsed time.

The read control signal QR1O from the memory unit 31A
And the memory section 3 for each odd-numbered predetermined period of the DV format data DCP1,
Each of the even-numbered predetermined period divisions of the DV format data DCP1, which is read from the 1B in accordance with the read control signal QR1E in units of 8 bits, each has a word transmission rate of 125 MBp.
It is assumed that the 8-bit word string data is formed as s, the read output D1O (8) as the 8-bit word string data is obtained from the memory section 31A, and the 8-bit word string data is obtained from the memory section 31B. Read output D
1E (8) is obtained.

Similarly, DV format data DCP2 to DCP are read from memory units 32A to 50A in units of 8 bits according to read control signals QR2O to QR20O, respectively.
P20 each odd-numbered predetermined period section and memory unit 3
2B to 50B to read control signals QR2E to QR20, respectively.
Each of the even-numbered predetermined period divisions of the DV format data DCP2 to DCP20, which are read in units of 8 bits according to E,
Each of them forms 8-bit word string data having a word transmission rate of 125 MBps, and a memory unit 32
Read outputs D2O (8) to D20O (8) as 8-bit word string data from A to 50A, respectively, and read outputs D2E (8) to 8-bit word string data from memory units 32B to 50B. D20E (8) is obtained respectively.

The read outputs D1O (8) to D20O (8) obtained from the memory units 31A to 50A and the additional word data group D read from the memory unit 51, respectively.
WS are collected in the data collection unit 55A. Further, readout outputs D1E obtained from the memory units 31B to 50B respectively.
(8) to D20E (8) and the additional word data group DWS read from the memory unit 51 are collected in the data collection unit 55B.

Memory unit 31 in data collection unit 55A
Readout outputs D1O (8) to D20O from A to 50A
The aggregation state of (8) and the additional word data group DWS from the memory unit 51 is set according to each of the read control signals QR1O to QR20O from the control signal forming unit 52 and the transmission state of the read control signal QRWS. Then, in the data collection unit 55A, the read outputs D1O (8) to D20O (8) from the memory units 31A to 50A and the memory unit 5
In accordance with the state of aggregation with the additional word data group DWS from No. 1, the synthesis section 8-bit word string data DXO (8) having a word transmission rate of 125 MBps is formed. This combined section 8-bit word string data DXO (8)
Are the read control signals QR1O to QR0 from the control signal forming unit 52.
It has a portion corresponding to a predetermined period TT corresponding to each of the QR20Os and the vertical synchronization signal SSV for controlling the transmission state of the read control signal QRWS.

Further, read outputs D1E (8) to D20 from memory units 31B to 50B in data collecting unit 55B.
The aggregation state of E (8) and the additional word data group DWS from the memory unit 51 is set according to each of the read control signals QR1E to QR20E from the control signal forming unit 52 and the transmission state of the read control signal QRWS. . Then, in the data collection unit 55B, the word transmission rate is set to 125 MBps according to the aggregation state of the read outputs D1E (8) to D20E (8) from the memory units 31B to 50B and the additional word data group DWS from the memory unit 51. Is formed, the synthesis section 8-bit word string data DXE (8) is formed. This combined 8-bit word string data DXE
(8) also shows the read control signal QR from the control signal forming unit 52
1E to QR20E and a portion corresponding to a predetermined period TT corresponding to the vertical synchronization signal SSV for controlling the transmission state of the read control signal QRWS.

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 55A and 55B, 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 TT 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 D20O (8) are successively connected to each other. Further, as shown in FIG. Data DXE (8)
EV1, EV2, EV corresponding to each predetermined period TT
.. Are added word data groups DWS
And the readout outputs D1E (8) to D20E
(8) are successively formed.

FIG. 5 shows the data collection units 55A and 55A.
5B shows another example of the combined section 8-bit word string data DXO (8) and DXE (8) formed respectively in FIG. 5B.
In the example shown in FIG. 5, as shown in FIG. 5A, portions OV1, OV2, OV corresponding to each predetermined period TT of the composite 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),.
... Readout output D to additional word data group DWS
The portions following 20O (8) are successively formed, and further, as shown in FIG. 5B, portions EV1 and EV2 corresponding to each predetermined period TT of the combined section 8-bit word string data DXE (8). , EV3,... Are output to the additional word data group DWS by the read output D1E (8).
, A portion where the additional word data group DWS is followed by the readout output D2E (8), a portion where the additional word data group DWS is followed by the readout output D3E (8), and a portion where the additional word data group DWS is read out D.
4E (8),...,..., An additional word data group DWS, followed by a read output D20E (8).

In this way, the synthesized section 8-bit word string data DXO formed in data grouping section 55A
(8) and each of the synthesized segmented 8-bit word string data DXE (8) formed in the data collection unit 55B 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 55A and 55B alternately by a predetermined period TT, respectively. , Data collection unit 5
6. In the data aggregating section 56, 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. In this case, at least one arbitrary 8-bit word auxiliary data DEX8 is alternately arranged with two 8-bit word synchronization data DEK8 and 8-bit word auxiliary data DEA8, and two additional arbitrary 8-bit word auxiliary data DEA8. Of the 8-bit word auxiliary data DEX8. The optional 8-bit word auxiliary data DEX8 is 10
When converted to bit word data, 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, DVV8 includes memory units 31A to 50A.
Read outputs D1O (8) to D20O read from A
(8) or 8 bit word data forming read outputs D1E (8) to D20E (8) read from the memory units 31B to 50B, and 8B / 10B
The conversion results in 10-bit word data DVV10.

In the second specific example of the additional word data group DWS, two 8-bit word synchronizing data DEK8 and two 8-bit word auxiliary 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, the DVV8 has the memory units 31A-5A.
Read outputs D1O (8) to D20O read from 0A
(8) or 8 bit word data forming read outputs D1E (8) to D20E (8) read from the memory units 31B to 50B, and 8B / 10B
The conversion results in 10-bit word data DVV10.

The composite 8-bit word sequence data DZ (8) with a word transmission rate of 125 MBps obtained from the data collection unit 56 is sent out from the composite 8-bit word sequence data forming unit 10 and has a built-in 8B / 10B conversion unit. / S conversion section 57.

P / S converter 57 with built-in 8B / 10B converter
, The composite 8-bit word string data DZ (8)
Then, an 8B / 10B conversion is performed in which each of the 8 bits forming each word is divided, and each of the divided 8 bits is sequentially converted into 10-bit data according to a conversion table prepared in advance. , The word transmission rate is 12 based on the composite 8-bit word string data DZ (8).
Composite 10-bit word string data DZ with 5 MBps
Form (10). At that time, the 8-bit word synchronization data DEK (8) is converted into K28.5 which is 10-bit word synchronization data, and the 8-bit word auxiliary data DEK (8) is converted.
A (8) is converted to D21.3, and arbitrary 8-bit word auxiliary data DEX8 is converted to 10-bit word data DX.
X. X, and further converted to 8-bit word data DV.
V8 is converted to 10-bit word data DVV10.

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
When the portion based on the additional word data group DWS in the 0-bit word string data DZ (10) is such that the RD immediately before the first K28.5 is negative (-), as shown in FIG. 6B. On the other hand, when the RD immediately before the first K28.5 is positive (+), it is as shown in FIG. 6C.

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
When the portion based on the additional word data group DWS in the 0-bit word string data DZ (10) is such that the RD immediately before the first K28.5 is negative (-), as shown in FIG. 7B. On the other hand, when the RD immediately before the first K28.5 is positive (+), it is as shown in FIG. 7C.

In addition to the above, a P with a built-in 8B / 10B conversion unit
In the / S conversion section 57, the composite 10 bit having a word transmission rate of 125 MBps obtained by the 8B / 10B conversion of the composite 8-bit word string data DZ (8)
P / S conversion for converting parallel data into serial data is performed on the bit word string data DZ (10), and the bit transmission rate based on the composite 10-bit word string data DZ (10) is 125 × 10 = 1.25 Gbps. Is obtained, and the serial data DZS is obtained.
Is supplied to the transmission unit 58.

The transmitting section 58 converts the serial data DZS into
For example, in order to transmit through a data transmission line formed using a coaxial cable or an optical fiber, an electric signal suitable for the data transmission line formed using a coaxial cable or an optical fiber is used. The signal is converted into a transmission signal SZ which is an optical signal suitable for the formed data transmission path and transmitted. Thereby, transmission of the serial data DZS is performed.

In the data transmission apparatus shown in FIG. 1 as described above, the P / S converter 5 with a built-in 8B / 10B converter
7 and the transmission unit 58 set the word transmission rate to 125 MBp
8B in the composite 8-bit word string data DZ (8) as s
/ 10B conversion to increase the word transmission rate to 125 MB
composite 10-bit word string data DZ (10) as ps
And the composite 10-bit word string data D
P / S conversion for converting parallel data into serial data is performed on Z (10), and the composite 10-bit word string data DZ (10) is converted into serial data DZS having a bit transmission rate of 1.25 Gbps and transmitted. Will be. Therefore, such an 8B / 10B conversion unit built-in P /
For example, the S conversion unit 57 and the transmission unit 58 can be configured by effectively using an integrated circuit (IC) element provided for transmitting digital data under a fiber channel system. 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. A plurality of DV format data are converted into 10-bit word string data including 10-bit word synchronization data, and further converted into serial data and transmitted to be transmitted, for example, into a plurality of DV format data. The digital video signal data or the video and audio signal data subjected to the data compression can be transmitted.

In the example shown in FIG. 1, the data is supplied to the composite 8-bit word string data forming unit 10 for transmission, 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, 20-channel DV format data DC which is 8-bit word string data of 6.25 MBps
P1 to DCP20, but D of 20 channels
Instead of the V format data DCP1 to DCP20,
Each has a bit transmission rate of, for example, 6.25 × 8 = 5.
20-channel DV format data, which is serial data of 0 Mbps, may be supplied to the composite 8-bit word string data forming unit 10.

FIG. 8 shows an example of the data transmission method according to the invention described in any one of claims 1 to 3 in the claims of the present application. An example of the data transmission device according to the invention described in Item 10 is shown.

In the example shown in FIG. 8, DV format data DCP, which is a plurality of digital video signal data or video and audio signal data subjected to data compression, is composed of a composite 8-bit word string. The data is supplied to the data forming unit 60. DV format data DCP
Is assumed to form 8-bit word string data with a word transmission rate of 6.25 MBps, for example.

In the composite 8-bit word string data forming section 60, the DV format data DCP is
1 is supplied. The switch 61 includes a control signal forming unit 6
2 is also supplied.

The control signal forming section 62 includes a vertical synchronizing signal SSV synchronized with the vertical synchronizing period of the DV format data DCP, a clock pulse signal CA having a frequency of 6.25 MHz, and a clock pulse signal CB having a frequency of 125 MHz. Supplied. The control signal CSV obtained from the control signal forming unit 62 is obtained based on, for example, the vertical synchronization signal SSV, and is synchronized with a predetermined period TT corresponding to the vertical synchronization period of the DV format data DCP or a period of an integral multiple thereof. It is assumed that.

The switch 61 is connected to a memory section 63A and a memory section 63B. Then, the switch 61 to which the DV format data DCP is supplied alternates the DV format data DCP between the memory unit 63A and the memory unit 63B by, for example, a predetermined period TT during which the control signal CSV is synchronized in response to the control signal CSV. In the DV format data DCP, the odd predetermined period section corresponding to every other predetermined period TT and the even predetermined period section corresponding to every other predetermined period TT are stored in the memory section 63A and the memory section 63A, respectively. 63B.

The memory section 63A includes a control signal forming section 62
Is supplied to the memory unit 63B, and the write control signal QWO from the control signal forming unit 62 is supplied to the memory unit 63B.
WE is supplied. Write control signal QWO is formed based on clock pulse signal CA and has a frequency of 6.25M.
Hz, and the control signal forming unit 6 synchronizes with the odd predetermined period division of the DV format data DCP.
2 and the write control signal QWE is also formed based on the clock pulse signal CA and has a frequency of 6.2.
It is set to 5 MHz, and is transmitted from the control signal forming unit 62 as synchronized with the even-numbered predetermined period division of the DV format data DCP.

Thus, the DV format data DC
Each odd-numbered predetermined period section in P is sequentially written into memory section 63A in response to write control signal QWO, and
Each even-numbered predetermined period section in the V format data DCP is sequentially written to the memory unit 63B in response to the write control signal QWE. Therefore, as shown in FIG. 9A, writing in the memory unit 63A and writing in the memory unit 63B are performed alternately by the predetermined period TT. Note that, in FIG. 9A, an arrow t indicates a lapse of time.

The composite 8-bit word string data forming unit 60 includes a memory unit 64 in addition to the memory units 63A and 63B.
Is provided. The memory unit 64 includes 8-bit word synchronization data DEK8 and 8-bit word auxiliary data DEA.
8 is stored as an additional word data group DWS composed of a plurality of 8-bit word data including “8”.

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 word 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 control signal forming section 62 is provided in the memory section 63A.
Is supplied to the memory unit 63B, and the read control signal QRO from the control signal forming unit 62 is supplied to the memory unit 63B.
RE is supplied. Further, the read control signal QRWS from the control signal forming unit 62 is supplied to the memory unit 64. Read control signal QR obtained from control signal forming section 62
O, QRE, and QRWS are each formed based on the clock pulse signal CB, and have a frequency of 125 MHz.
The transmission state from the control signal forming unit 62 is controlled by the vertical synchronization signal SSV.

The D written in the memory 63A is
Each of the odd predetermined period sections of the V format data DCP is read in units of 8 bits in accordance with the read control signal QRO, and the DV format data D written in the memory unit 63B is read.
Each even-numbered predetermined period section of the CP is read out by 8 bits according to the read control signal QRE. In such a case, the memory unit 63
As shown in FIG. 9B, reading from A and 63B alternates between reading from memory unit 63B and reading from memory unit 63A for a predetermined period TT. FIG.
Also in B, the arrow t indicates the passage of time. Also,
Additional word data group D stored in memory unit 64
WS is read in accordance with the read control signal QRWS assuming that the word transmission rate is 125 MBps.

The odd-numbered predetermined period division of the DV format data DCP read out by 8 bits at a time according to the read control signal QRO from the memory section 63A, and the memory section 63B
Each of the even-numbered predetermined period divisions of the DV format data DCP read from the memory unit 63 in accordance with the read control signal QRE forms 8-bit word string data having a word transmission rate of 125 MBps. The read output DO (8) as word string data is obtained, and the memory unit 63B outputs
A read output DE (8) as bit word string data is obtained.

At this time, in each of the memory units 63A and 63B, the DV format data DCP is written at a bit rate of 6.25 × 8 = 50 Mbps, and thereafter, the bit rate is set at 125 × 8 = 1.0 Gb.
and the word transmission rate is 125
Since it is 8-bit word string data of MBps,
The data is read at 20 times speed.

The read output DO (8) obtained from the memory section 63A, the read output DE (8) obtained from the memory section 63B, and the additional word data group DWS read from the memory section 64 are stored in the data collection section. Collected at 65. Memory unit 63A in data collection unit 65
The read output DO (8) from the memory unit 63, the read output DE (8) from the memory unit 63B, and the aggregate state of the additional word data group DWS from the memory unit 64 are stored in the control signal forming unit 6.
2 is set in accordance with the transmission state of the read control signals QRO, QRE and QRWS from the second. Then, the data collection unit 65
, The read output DO (8) from the memory 63A,
Readout output DE (8) from memory unit 63B and memory unit 6
4, the composite 8-bit word string data DZ (8) having a word transmission rate of 125 MBps is formed in accordance with the aggregation state with the additional word data group DWS from No. 4.

FIG. 10 shows an example of the composite 8-bit word string data DZ (8) formed in the data collection section 65. In the example shown in FIG. 10, each of portions ZV1, ZV2, ZV3,... Corresponding to each predetermined period TT of composite 8-bit word string data DZ (8) is First, the read output DO (8) or DE (8) is connected to the read output DO (8) or DE (8).

FIG. 11 shows another example of the composite 8-bit word string data DZ (8) formed in the data collection section 65. In the example shown in FIG. 11, each predetermined period TT of composite 8-bit word string data DZ (8)
., Corresponding to the additional word data group DWS,
The portion following (8) or DE (8) is repeatedly connected.

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, for example, as shown in FIG. 6A or FIG. 7A.

The composite 8-bit word sequence data DZ (8) obtained from the data collection unit 65 and having the word transmission rate of 125 MBps is sent from the composite 8-bit word sequence data forming unit 60 and has a built-in 8B / 10B conversion unit P / S conversion section 67.

P / S converter 67 with built-in 8B / 10B converter
In the above, 8B / 10B conversion is performed on the composite 8-bit word string data DZ (8), and the word transmission rate based on the composite 8-bit word string data DZ (8) is set to 125 MB.
composite 10-bit word string data DZ (10) as ps
To form At this time, the 8-bit word synchronization data DEK
(8) is K28. 10-bit word synchronous data.
5 and the 8-bit word auxiliary data DEA (8)
Is converted to D21.3, and arbitrary 8-bit word auxiliary data DEX8 is converted to 10-bit word data DXX. X, and the 8-bit word data DVV8 is
It is converted into bit word data DVV10.

Therefore, composite 8-bit word string data D
Z (8) additional word data group DWS inserted
Is as shown in FIG. 6A, the composite 1
When the portion based on the additional word data group DWS in the 0-bit word string data DZ (10) is such that the RD immediately before the first K28.5 is negative (-), as shown in FIG. 6B. On the other hand, when the RD immediately before the first K28.5 is positive (+), it is as shown in FIG. 6C.

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
When the portion based on the additional word data group DWS in the 0-bit word string data DZ (10) is such that the RD immediately before the first K28.5 is negative (-), as shown in FIG. 7B. On the other hand, when the RD immediately before the first K28.5 is positive (+), it is as shown in FIG. 7C.

In addition to the above, a P with a built-in 8B / 10B conversion unit
The / S converter 67 converts the composite 8-bit word string data DZ (8) to 8 MB / 10B conversion, and sets the word transmission rate to 125 MBps.
P / S conversion for converting parallel data into serial data is performed on the bit word string data DZ (10), and the bit transmission rate based on the composite 10-bit word string data DZ (10) is 125 × 10 = 1.25 Gbps. Is obtained, and the serial data DZS is obtained.
Is supplied to the transmission unit 68.

The transmitting section 68 converts the serial data DZS into
For example, in order to transmit through a data transmission line formed using a coaxial cable or an optical fiber, an electric signal suitable for the data transmission line formed using a coaxial cable or an optical fiber is used. The signal is converted into a transmission signal SZ which is an optical signal suitable for the formed data transmission path and transmitted. Thereby, transmission of the serial data DZS is performed.

The serial data DZS transmitted at a bit transmission rate of 1.25 Gbps is
S / P converted on the receiving side and 10B / 8B
After conversion, 8-bit word string data with a word transmission rate of 125 MBps is reproduced.
Therefore, the word transmission rate is set to 6.25 MBps8.
Bit word string data (bit transmission rate is 50 Mbp
s), the DV format data DCP is transferred as 8-bit word string data with a word transmission rate of 125 MBps (the bit transmission rate is 1 Gbps), and therefore, 125 / 6.25 for the DV format data DCP. (100/50) = 20 times speed transfer is performed.

Even in the data transmission apparatus shown in FIG. 8 as described above, the P / S conversion section 6 with a built-in 8B / 10B conversion section
7 and the transmitting unit 68 set the word transmission rate to 125 MBp
8B in the composite 8-bit word string data DZ (8) as s
/ 10B conversion to increase the word transmission rate to 125 MB
composite 10-bit word string data DZ (10) as ps
And the composite 10-bit word string data D
P / S conversion for converting parallel data into serial data is performed on Z (10), and the composite 10-bit word string data DZ (10) is converted into serial data DZS having a bit transmission rate of 1.25 Gbps and transmitted. Will be. Therefore, such an 8B / 10B conversion unit built-in P /
The S conversion section 67 and the transmission section 68 can be configured by effectively utilizing, for example, an integrated circuit (IC) element provided for transmitting digital data under a fiber channel system. 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. The data is converted into 10-bit word string data including 10-bit word synchronization data, further converted into serial data, and sent out for transmission. The digital video signal data or the video and audio signal data thus obtained can be transmitted.

In the example shown in FIG. 8 described above, data compressed digital video signal data or video is supplied to the composite 8-bit word string data forming section 60 for transmission. And audio signal data,
The DV format data DCP, which is 8-bit word string data with a word transmission rate of, for example, 6.25 MBps, is used.
Instead of the bit transmission rate, for example, 6.25 × 8
DV format data, which is serial data having a data rate of 50 Mbps,
0 may be supplied.

FIG. 12 shows a transmission in the example of the data transmission apparatus shown in FIG. 1 according to an example of the data transmission method according to any one of claims 4 to 9 in the claims of the present application. Sent out by the unit 58;
Combined 8-bit word string data DZ (8) is 8B / 10B
1 shows an example of a data receiving apparatus that receives a transmission signal SZ based on serial data DZS obtained by conversion and P / S conversion.

In the example of the data receiving apparatus shown in FIG. 12, for example, an electric signal suitable for a data transmission line formed using a coaxial cable, or an optical signal formed 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 / 10B / 8B converter 71.

Synchronous data detection, S / P conversion, 10B / 8
The B conversion unit 71 detects, as synchronous data, a portion of the serial data DZS in which + K28.5 or -K28.5, which is 10-bit synchronous word data, is converted into serial data, and detects the detected synchronous data. Synchronizes the serial data DZS with S
/ P conversion processing, as shown in A or C of FIG. 13 or A or C of FIG.
Form composite 10-bit word string data DZ (10), which is parallel data with a word transmission rate of 125 MBps. The composite 10-bit word string data DZ (10) shown in A or C of FIG. 13 or A or C of FIG. 14 is composed of the contents of the additional word data group DWS and the first K28.5 of the additional word data group DWS. It is selectively formed according to the RD of the immediately preceding data.

Synchronous data detection, S / P conversion, 10
The B / 8B conversion section 71 divides the composite 10-bit word string data DZ (10) into 10-bit units at a time, and converts each of the divided 10-bit data into 8-bit data according to a conversion table prepared in advance. Performs 10B / 8B conversion for sequentially converting data, and based on the 8-bit data sequentially obtained, compound 8-bit word string data D having a word transmission rate of 125 MBps.
Play Z (8). Then, synchronous data detection / S / P
The composite 8-bit word string data DZ (8) with the word transmission rate of 125 MBps obtained from the conversion / 10B / 8B conversion unit 71 is supplied to the word data separation unit 72.

Synchronous data detection, S / P conversion, 10
The B / 8B converter 71 detects + K28.5 and -K28.5 in the additional word data group DWS in the composite 10-bit word string data DZ (10), and sends out a K28.5 detection output signal SWS. . This K
The 28.5 detection output signal SWS is, for example, shown in B or D in FIG. 13 or B or D in FIG. Obtained as

In the case of B or D in FIG. 13, K28.5
From the 30th bit counted from the falling edge of the last pulse in the detection output signal SWS, the DV format data DC
10-bit word data DV based on P1 to DCP20
V10 starts. In the case of B or D in FIG. 14, 10-bit word data DVV10 based on the DV format data DCP1 to DCP20 starts from the 10th bit counted from the trailing edge of the last pulse in the K28.5 detection output signal SWS. . Thus, the K28.5 detection output signal SWS obtained from the synchronous data detection / S / P conversion / 10B / 8B conversion unit 71 is supplied to the word data separation unit 72.

The word data separation section 72 uses the K28.5 detection output signal SWS from the synchronization data detection / S / P conversion / 10B / 8B conversion section 71 to generate a composite 8
The additional word data group DWS is separated from the bit word string data DZ (8), and the word transmission rate based on the composite 8-bit word string data DZ (8) is set to 125.
The 8-bit word string data DX (8) having MBps and the additional word data group DWS are separated from each other and extracted.

Thus, the word transmission rate obtained from the word data separating section 72 is set to 125 MBps.
The bit word string data DX (8) is supplied to the data restoring unit 73.
The additional word data group DWS obtained from the word data separation unit 72 is also supplied to the data restoration unit 7.
3 is supplied.

In data restoring section 73, 8-bit word string data DX (8) from word data separating section 72 is output.
Is supplied to the movable contact 75a of the switch 75,
Further, the additional word data group DWS from the word data separating unit 72 is supplied to the control signal forming unit 74.
The control signal forming unit 74 is also supplied with a clock pulse signal CA having a frequency of 6.25 MHz and a clock pulse signal CB having a frequency of 125 MHz.

The control signal CDV from the control signal forming unit 74 is also supplied to the switch 75 having the movable contact 75a to which the 8-bit word string data DX (8) from the word data separating unit 72 is supplied. The control signal CDV is formed in the control signal forming section 74 in accordance with the additional word data group DWS from the word data separating section 72, and each predetermined signal in the 8-bit word string data DX (8) obtained from the word data separating section 72. This is synchronized with a portion corresponding to the period TT (hereinafter, referred to as a predetermined period TT portion).

The switch 75 alternately connects the movable contact 75a to the selection contact 75b and the selection contact 75c at intervals corresponding to the predetermined period TT in accordance with the control signal CDV from the control signal forming unit 74. Perform the operation. The selection contacts 75b of the switch 75 include the memory units 81A, 82
A, 83A, 84A,..., 100A are connected, and the selection contacts 75c of the switch 75 are connected to the memory units 81B, 82B, 83B, 84B,.
0B is connected.

Thus, the switch 75 sets the control signal C
In accordance with the DV, the 8-bit word string data DX (8) from the word data separating unit 72 is divided into TT portions for a predetermined period TT,
Each of the memory units 81A to 100A and the memory unit 81
B to 100B are sequentially and alternately supplied.

The write control signals QW1O, QW2O, QW from the control signal forming section 74 are provided in the memory sections 81A to 100A.
, QW20O are supplied respectively, and the write control signals QW1E, QW2 from the control signal forming unit 74 are supplied to each of the memory units 81B to 100B.
, QW3E, QW4E,..., QW20E are respectively supplied. Write control signals QW1O to QW20O and QW1E to QW20E obtained from control signal forming section 74
Are formed based on the clock pulse signal CB, the frequency is set to 125 MHz, and the transmission timing from the control signal forming unit 74 is set according to the additional word data group DWS. 8-bit word string data DX from word data separating section 72
In (8), control is performed in accordance with the timing set in advance corresponding to the data synthesis mode of each predetermined period TT.

At this time, the writing in each of the memory units 81A to 100A and the writing in each of the memory units 81B to 100B are alternately performed for each period segment corresponding to each predetermined period TT in which the control signal CDV is synchronized. Done.
Then, in each of the period divisions corresponding to every other predetermined period TT, the 8-bit word string data DX (8) is output in accordance with the transmission timing of the write control signals QW1O to QW20O from the control signal forming unit 74. ) Predetermined period T
8-bit word string data D1O (8), D2O (8), D3O (8), D constituting the first part of the T part
4O (8),..., D20O (8) are collectively written into the memory units 81A to 100A, respectively. Further, in each of the other time periods corresponding to the other predetermined time period TT portion, the 8-bit word string data DX is output in accordance with the transmission timing of the write control signals QW1E to QW20E from the control signal forming unit 74. The predetermined period T of (8)
8-bit word string data D1E (8), D2E (8), D3E (8), D constituting the second part of the T part
4E (8),..., D20E (8) are written together in the memory units 81B to 100B.

Further, each of memory units 81A to 100A is supplied with a read control signal QRO from control signal forming unit 74, and each of memory units 81B to 100B is provided with a read control signal QRO from control signal forming unit 74. A control signal QRE is provided. The read control signal QRO has a frequency of 6.25 MHz based on the clock pulse signal CA, and the 8-bit word string data DX (8) from the word data separation unit 72 according to the additional word data group DWS. In the predetermined period TT in
And the read control signal QRE is formed to have a frequency of 6.25 MHz based on the clock pulse signal CA, and according to the additional word data group DWS. , 8-bit word string data DX from word data separating section 72
It is transmitted from the control signal forming section 74 in synchronization with the second part of the predetermined period TT in (8).

Thus, in the period division corresponding to every other predetermined period TT, memory units 81A-100A
A 8-bit word string data D1O written to A respectively
(8) to D20O (8) are read from the memory units 81A to 100A in accordance with the read control signal QRO in the period section corresponding to the next predetermined period TT.
At this time, the 8-bit word string data D1O (8) to D20O (8) written in the memory units 81A to 100A, respectively.
Set the word transmission rate to 6.25 MBps according to the frequency 6.25 MHz of the read control signal QRO8
The data is read as forming bit word string data, and is read from the memory units 81A to 100A based on the 8-bit word string data D1O (8) to D20O (8), respectively.
Readout outputs S1O, S2O, S3 as 8-bit word string data with a word transmission rate of 6.25 MBps
O, S4O,..., S20O are obtained.

Further, in the period division corresponding to every other predetermined period TT, the memory units 81B to 100B
Word string data D1E respectively written in
(8) to D20E (8) are read from the memory units 81B to 100B in accordance with the read control signal QRE in the period section corresponding to the next predetermined period TT.
At this time, the 8-bit word string data D1E (8) to D20E (8) written in the memory units 81B to 100B, respectively.
Set the word transmission rate to 6.25 MBps corresponding to the frequency 6.25 MHz of the read control signal QRE.
It is read as forming bit word string data and read from the memory units 81B-100B based on the 8-bit word string data D1E (8) -D20E (8), respectively.
Readout outputs S1E, S2E, S3 as 8-bit word string data having a word transmission rate of 6.25 MBps
, S4E,..., S20E are obtained.

Read output S1 obtained from memory unit 81A
O, the readout output S1E obtained from the memory unit 81B is provided to the switch 101, the readout output S2O obtained from the memory unit 82A and the readout output S2E obtained from the memory unit 82B are provided to the switch 102, and the readout output obtained from the memory unit 83A. S3O and readout output S3 obtained from memory unit 83B
E is the switch 103, the read output S4O obtained from the memory section 84A and the read output S4E obtained from the memory section 84B are the switch 104,..., The read output S200 obtained from the memory section 100A and the memory. Part 10
0B and the output S20E obtained from the switch 120
Are supplied respectively.

Each of the switches 101 to 120 is also supplied with a control signal CSV from the control signal forming unit 74. The control signal CSV is synchronized with the control signal CDV.

The switch 101 alternately takes out the read output S1O and the read output S1E in accordance with the control signal CSV, and reproduces a series of 8-bit word string data, DV format data DCP1 having a word transmission rate of 6.25 MBps. I do. Similarly, switches 102 to 12
0 is the read output S2O according to the control signal CSV.
And S2E and ~ S20O and S20E are alternately taken out,
DV format data D having a word transmission rate of 6.25 MBps, which is a series of 8-bit word string data
Play CP2 to DCP20.

Thus, the switches 101 to 120
, And 20-channel DV format data DCP1 to DCP20 obtained respectively from the data restoration unit 73.

FIG. 15 shows a transmission in the example of the data transmission apparatus shown in FIG. 8 in accordance with an example of the data transmission method according to any one of the first to third aspects of the present invention. Sent from the unit 68,
Combined 8-bit word string data DZ (8) is 8B / 10B
1 shows an example of a data receiving apparatus that receives a transmission signal SZ based on serial data DZS obtained by conversion and P / S conversion.

In the example of the data receiving apparatus shown in FIG. 15, 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. And a receiving unit 130 for receiving a transmission signal SZ which is an optical signal suitable for the data transmission path. When receiving the transmission signal SZ, the receiving unit 130 reproduces the serial data DZS based on the received transmission signal SZ and supplies it to the synchronous data detection / S / P conversion / 10B / 8B conversion unit 131.

Synchronous data detection, S / P conversion, 10B / 8
In the B conversion unit 131, + K28.5 which is 10-bit synchronous word data in the serial data DZS is used.
Alternatively, -K28.5 is detected as a part of the data converted to serial data as synchronous data, word synchronization is performed based on the detected synchronous data, and S / P conversion processing is performed on the serial data DZS. Rate 1
Form composite 10-bit word string data DZ (10), which is parallel data of 25 MBps.

Further, synchronous data detection, S / P conversion, 1
The 0B / 8B conversion unit 131 performs 10B / 8B conversion on the composite 10-bit word string data DZ (10),
Based on the 8-bit data obtained sequentially,
The composite 8-bit word string data DZ (8) having a word transmission rate of 125 MBps is reproduced. Then, the composite 8-bit word string data DZ (8) with the word transmission rate of 125 MBps obtained from the synchronous data detection / S / P conversion / 10B / 8B conversion section 131 is supplied to the word data separation section 132.

Synchronous data detection, S / P conversion, 10
The B / 8B converter 131 detects + K28.5 and -K28.5 in the additional word data group DWS in the composite 10-bit word string data DZ (10), and outputs the K28.5 detection output signal SWS to the word data. It is sent to the separation unit 132. This K28.5 detection output signal SW
S is determined according to the contents of the additional word data group DWS in the composite 10-bit word string data DZ (10).
For example, B or D in FIG. 13 or B in FIG.
Alternatively, it is obtained as shown in D.

In the word data separation section 132, synchronous data detection / S / P conversion / 10B / 8B conversion section 131
Is used to separate the additional word data group DWS from the composite 8-bit word string data DZ (8), and the word based on the composite 8-bit word string data DZ (8) is used. Transmission rate 1
8-bit word string data DX (8) with 25 MBps
And the additional word data group DWS are separated from each other and taken out.

As a result, the 8-bit word string data DX (8) with a word transmission rate of 125 MBps obtained from the word data separation section 132 is converted to the data restoration section 1.
33, and the additional word data group DWS obtained from the word data separation unit 132 is also supplied to the data restoration unit 133.

In data restoration section 133, 8-bit word string data DX from word data separation section 132 is output.
(8) is supplied to the movable contact 135 a of the switch 135, and the additional word data group DWS from the word data separating unit 132 is supplied to the control signal forming unit 134.
Supplied to The control signal forming unit 134 is also supplied with a clock pulse signal CA having a frequency of 6.25 MHz and a clock pulse signal CB having a frequency of 125 MHz.

Movable contact 135 to which 8-bit word string data DX (8) is supplied from word data separating section 132
The switch 135 having “a” includes the control signal forming unit 134.
Is supplied as well. Control signal CDV
Are formed in the control signal forming unit 134 in accordance with the additional word data group DWS from the word data separating unit 132, and are obtained from the word data separating unit 132.
Each predetermined period T in the bit word string data DX (8)
It is synchronized with a portion corresponding to T (hereinafter, referred to as a TT portion for a predetermined period).

The switch 135 is connected to the control signal forming unit 134
The movable contact 135a in accordance with the control signal CDV from
The selection contact 1 is set for each period segment corresponding to the predetermined period TT.
An operation of connecting alternately to 35b and selection contact 135c is performed. The memory section 136A is connected to the selection contact 135b of the switch 135, and the memory section 136B is connected to the selection contact 135c of the switch 135.

Thus, switch 135 sequentially transmits 8-bit word string data DX (8) from word data separation section 132 to memory sections 136A and 136B for a predetermined period TT in response to control signal CDV. Supply alternately.

The memory section 136A includes the control signal forming section 1
The write control signal QWO from the control signal generator 34 is supplied to the memory unit 136B. Each of write control signals QWO and QWE obtained from control signal forming section 134 is formed based on clock pulse signal CB and has a frequency of 1
The transmission timing from the control signal forming unit 134 is set to 25 MHz according to the additional word data group DWS. , And is controlled in accordance with the timing set in advance in accordance with the data synthesizing mode of each predetermined period TT.

At this time, the writing in the memory unit 136A and the writing in the memory unit 136B are alternately performed for each period section corresponding to each predetermined period TT in which the control signal CDV is synchronized. And every other predetermined period T
In each of the time divisions corresponding to the T part, the first part of the 8-bit word string data DX (8) in the predetermined period TT is determined according to the transmission timing of the write control signal QWO from the control signal forming unit 134. The constituent 8-bit word string data DO (8) is written to the memory unit 136A. In addition, in each of the period divisions corresponding to every other predetermined period TT, according to the transmission timing of the write control signal QWE from the control signal forming unit 134, the 8-bit word string data DX (8) is output. 8-bit word string data DE constituting a second portion in a predetermined period TT portion
(8) is written to the memory unit 136B.

Furthermore, read control signal QRO from control signal forming section 134 is supplied to memory section 136A, and read control signal QRE from control signal forming section 134 is supplied to memory section 136B. Read control signal QR
O sets the frequency to 6. based on the clock pulse signal CA.
25 MHz, and the word data separation unit 132 according to the additional word data group DWS.
From the control signal forming section 134 in synchronization with the first portion of the predetermined period TT in the 8-bit word string data DX (8) from
Sets the frequency to 6.2 based on the clock pulse signal CA.
The control signal is formed in synchronization with the second part of the 8-bit word string data DX (8) from the word data separation unit 132 in the predetermined period TT in accordance with the additional word data group DWS. It is sent from the unit 134.

Thus, in the period division corresponding to every other predetermined period TT, the 8-bit word string data DO (8) written in the memory unit 136A is changed to the period division corresponding to the next predetermined period TT. , The data is read from the memory unit 136A in accordance with the read control signal QRO. At this time, the word transmission rate of the 8-bit word string data DO (8) written in the memory unit 136A is set to 6.2 according to the frequency 6.25 MHz of the read control signal QRO.
8-bit word string data having a word transmission rate of 6.25 MBps based on the 8-bit word string data DO (8) and read out from the memory unit 136A based on the formation of 8-bit word string data of 5 MBps. Read output SO is obtained.

Further, in a period division corresponding to every other predetermined period TT, the 8-bit word string data DE (8) written in the memory unit 136B has a period corresponding to the next predetermined period TT. In the section, data is read from the memory unit 136B according to the read control signal QRE. At this time, the word transmission rate of the 8-bit word string data DE (8) written in the memory unit 136B is set to 6.2 according to the frequency 6.25 MHz of the read control signal QRE.
The 8-bit word string data having a word transmission rate of 6.25 MBps based on the 8-bit word string data DE (8) is read from the memory unit 136B and read as forming 8-bit word string data of 5 MBps. Read output SE is obtained.

Read output S obtained from memory unit 136A
O and the read output SE obtained from the memory unit 136B are supplied to the switch 137. The control signal CSV from the control signal forming unit 134 is also supplied to the switch 137.
The control signal CSV is synchronized with the control signal CDV.

The switch 137 takes out the read output SO and the read output SE alternately according to the control signal CSV.
DV format data D having a word transmission rate of 6.25 MBps, which is a series of 8-bit word string data
Play the CP. In this way, the DV format data DCP obtained from the switch 137 is transmitted from the data restoration unit 73.

In the example of the data transmission method implemented using the example of the data transmission apparatus shown in FIG. 1 or FIG. 8, DV format data is multiplexed or transmitted alone. However, the data to be transmitted is not limited to DV format data,
It may be digital video signal data or video and audio signal data subjected to other data compression,
The number of channels of multiplex-transmitted data is also 20 in the case of the example shown in FIG. 1, but is not limited to 20 channels and can be an arbitrary number of channels.

[0132]

As is clear from the above description, any one of claims 1 to 3 or claims 4 to 9 in the claims of the present application as described above. According to the data transmission method according to the invention, the composite 10 transmitted as serial data in accordance therewith
The bit word string data is used when the receiving side performs word synchronization data detection by detecting only word synchronization data with RD being positive or by detecting only word synchronization data with RD being negative. In any case, on the receiving side, 10-bit word synchronous data is required for processing for reproducing data that has been subjected to data compression, such as MPEG image information data and DV format image information data. It is assumed that the word synchronization data is properly detected. Also, 1 included in the composite 10-bit word string data
Since the 0-bit word string data is obtained through the 8B / 10B conversion processing, good transmission quality is provided. Therefore, on the receiving side, data compression such as MPEG image information data, DV format image information data, etc., based on the received composite 10-bit word string data is performed under the condition that good transmission quality is obtained. A state in which the data synchronization state required for the processing for reproducing the data on which the data synchronization has been performed is reliably obtained.

According to the data transmission method according to any one of claims 1 to 3 or claims 4 to 9 in the claims of the present application, the composite 8 8 for bit word string data
B / 10B conversion and conversion into serial data, transmission of the converted serial data, reception of serial data, conversion of received serial data into composite 8-bit word string data on the receiving side, and the like. For example, it can be performed using an integrated circuit device used for transmitting and receiving a digital video signal under a fiber channel system. 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. For example, one or a plurality of MPEG image information data, DV, and the like are converted into 10-bit word string data including 10-bit word synchronization data and further transmitted to be converted into serial data and transmitted. It is possible to transmit digital video signal data or video and audio signal data subjected to one or more data compression, such as format image information data.

Further, according to the data transmission apparatus of the invention described in claim 10 or claim 11 of the present application, the composite 10-bit word string data transmitted as serial data by the data transmission apparatus is In either case, the receiving side detects the word synchronous data by detecting only the word synchronous data with RD being positive, or performs the detection by detecting only the word synchronous data with RD negative. Also, on the receiving side, the 10-bit word synchronization data
It is assumed that the data is properly detected as word synchronization data required for processing for reproducing data that has been subjected to data compression such as G image information data. Further, the 10-bit word string data included in the composite 10-bit word string data is obtained through the 8B / 10B conversion processing, thereby providing good transmission quality. Therefore, on the receiving side, reproduction of data that has been subjected to data compression, such as a plurality of MPEG image information data based on the received composite 10-bit word string data, can be performed while obtaining good transmission quality. A state in which the data synchronization state required for the processing for the data is reliably obtained.

According to the data transmission apparatus according to the tenth or eleventh aspect of the present invention, 8B / 10B conversion of composite 8-bit word string data and serial data conversion are performed. The conversion of the serial data and the transmission of the converted serial data, and the reception of the serial data and the conversion of the received serial data into the composite 8-bit word string data on the receiving side are performed, for example, in a fiber channel system. It can be performed using an integrated circuit device used for transmission and reception of the original digital video signal.
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. For example, one or a plurality of MPEG image information data, D, and the like are converted into 10-bit word string data including 10-bit word synchronization data, and further converted into serial data and transmitted to be transmitted.
Digital video signal data or video and audio signal data subjected to one or more data compression, such as V format image information data, can be transmitted.

[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. 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 4 to 9 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 9 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 any one of claims 4 to 9 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 4 to 9 in the claims of the present application.

FIG. 6 is a time chart for explaining an example of the data transmission method according to the invention described in any one of claims 4 to 9 in the claims of the present application.

FIG. 7 is a time chart for explaining an example of a data transmission method according to any one of claims 4 to 9 in the claims of the present application.

FIG. 8 is a diagram showing an example of a data transmission method according to any one of claims 1 to 3 in the claims of the present application; FIG. 2 is a block diagram illustrating an example of a data transmission device according to the described invention.

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 3 in the claims of the present application.

FIG. 10 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 3 in the claims of the present application.

FIG. 11 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 3 in the claims of the present application.

FIG. 12 shows an example of a data receiving apparatus for receiving a transmission signal transmitted according to an example of the data transmission method according to any one of claims 4 to 9 in the claims of the present application. It is a block block diagram.

FIG. 13 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 12;

FIG. 14 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 12;

FIG. 15 shows an example of a data receiving apparatus for receiving a transmission signal transmitted according to an example of the data transmission method according to any one of claims 1 to 3 in the claims of the present application. It is a block block diagram.

FIG. 16 is a conceptual diagram explaining a “frame” used for transmitting digital data.

FIG. 17 is a conceptual diagram serving to explain word synchronization data used in transmitting digital data.

[Explanation of symbols]

10, 60... Composite 8-bit word string data forming unit,
11 to 30, 61 ... switch, 52, 62 ...
・ Control signal forming unit, 31A to 50A, 31B to 50
B, 51, 63A, 63B, 64 ... memory unit, 5
5A, 55B, 56, 65... Data set part, 5
7, 67 ... 8B / 10B converter built-in P / S converter,
58, 68 ... transmitting unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/24 H04N 7/13 Z F Term (Reference) 5C059 LA02 LA10 MA00 RC02 UA24 UA35 5K028 AA14 BB08 GG00 KK01 KK03 MM17 NN01 5K029 AA01 CC04 DD02 EE06 EE18 FF10 GG03 HH21 HH26 5K034 AA05 EE02 HH01 HH02 HH05 HH12 HH16 MM25 PP07 5K047 AA11 BB02 CC01 DD01 DD02 FF17 HH01 HH03 HH12 HH43 MM

Claims (11)

[Claims] 1. A compressed digital video signal data or video and audio signal data is alternately written in predetermined time intervals into first and second memory means, and the first and second memory means are written in the first and second memory means. The period divisions written for each are sequentially converted into N-bit word string data by N
(N is a positive number) The data is read at double speed reading, the 8-bit word string data respectively read from the first and second memory means, and the specific word synchronization data which is 8-bit word data having a preset code The combined 8-bit word string data is combined with the included additional word data group to form composite 8-bit word string data into which the additional word data group is inserted at a predetermined word interval. Using a parallel / serial conversion means having a built-in 10-bit conversion processing means, an 8-bit / 10-bit conversion is performed, and a running disparity obtained based on the specific word synchronization data is set to a predetermined positive or negative. And a portion based on the additional word data group, including 10-bit word synchronization data Data transmission method to form a case 10-bit word sequence data, and converts the composite 10-bit word sequence data into serial data, and sends order to transmit the serial data. 2. The data transmission method according to claim 1, wherein the digital video signal data or the video and audio signal data is digital image information data subjected to data compression by high efficiency coding. 3. The 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 a discrete cosine transform method. Item 3. The data transmission method according to Item 2. 4. A plurality of compressed digital video signal data or video and audio signal data, each of which is written in a predetermined period segment into a plurality of memory means, and a period in which each of the plurality of memory means is written. The section is sequentially read as 8-bit word string data, and includes a plurality of 8-bit word string data respectively read from the plurality of memory means and specific word synchronization data which is 8-bit word data having a preset code. The combined 8-bit word string data is combined with the additional 8-bit word string data to form composite 8-bit word string data in which the additional word data group is inserted at a predetermined word interval. Using parallel / serial conversion means incorporating bit conversion processing means,
Based on the additional word data group including 10-bit word synchronization data obtained by performing 8-bit / 10-bit conversion based on the specific word synchronization data and having a predetermined positive or negative running disparity. A data transmission method for forming composite 10-bit word string data having a portion, converting the composite 10-bit word string data into serial data, and transmitting the serial data for transmission. 5. The data transmission according to claim 4, wherein each of the plurality of digital video signal data or video and audio signal data is digital image information data subjected to data compression by high efficiency coding. Method. 6. 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 5, wherein 7. The 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. 6. The method according to claim 4, wherein
Or the data transmission method according to 6. 8. 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 negative running disparity. 6. The method according to claim 4, wherein
6. The data transmission method according to claim 6. 9. The supplementary word data group includes auxiliary word data, and when the auxiliary word data is converted into a 10-bit word, the auxiliary word data is converted into 10-bit word data with a running disparity of neutral. 5. The method according to claim 4, wherein
The data transmission method according to any one of claims 1 to 8. 10. For the compressed digital video signal data or video and audio signal data, predetermined time intervals are alternately written into the first and second memory means, and the first and second memory means are stored in the first and second memory means. The written period segments are sequentially read as N-bit (N is a positive number) double-speed reading as 8-bit word string data.
And an 8-bit word string data read from the second memory means and an additional word data group including specific word synchronization data converted into 8-bit word data having a preset code are combined to form a predetermined 8-bit word string data forming means for forming compound 8-bit word string data into which the additional word data group is inserted at a word interval, and a compound 8 obtained from the 8-bit word string data forming means
Bit word string data is supplied, and the composite 8-bit word string data is subjected to 8-bit / 10-bit conversion to obtain a predetermined positive or negative running disparity obtained based on the specific word synchronization data. Forming composite 10-bit word sequence data having a portion based on the additional word data group, including 10-bit word synchronization data, and converting the composite 10-bit word sequence data into serial data. Data comprising: a parallel / serial converter having a built-in 10-bit conversion processor; and a transmitter for transmitting serial data obtained from the parallel / serial converter having a built-in 8-bit / 10-bit converter. Transmission equipment. 11. A plurality of compressed digital video signal data or video and audio signal data, each of which is written in a predetermined period division into a plurality of memory means, and a period in which each of the plurality of memory means is written. The sections are sequentially read as 8-bit word string data, and a plurality of 8-bit word string data respectively read out from the plurality of memory means and an 8-bit word string having a preset code.
An 8-bit word that combines bit word data and an additional word data group containing specific 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 Word string data forming means; composite 8 obtained from the 8-bit word string data forming means
An 8-bit / 10-bit conversion is performed on the bit word string data, and is obtained based on the specific word synchronization data.
A composite 1 having a portion based on the additional word data group, including 10-bit word synchronization data having a predetermined positive or negative running disparity.
While forming the 0-bit word string data,
Convert 0-bit word string data to serial data,
Parallel / serial conversion means including an 8-bit / 10-bit conversion processing means; transmission means for transmitting serial data obtained from the parallel / serial conversion means including the 8-bit / 10-bit conversion processing means; A data transmission device comprising: