JP2000349835A - Method and device for data transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To divide data representing a digital video signal into a plurality of channel data to enable multiplex transmission by converting 1st and 2nd compound 10-bit word string data into 1st and 2nd serial data respectively and transmitting the respective 1st and 2nd serial data. SOLUTION: Compound 10-bit word string data DZY (10) formed by a 8B/10B converting part 20 is transmitted from a 10-bit word string data forming part 11 and supplied to a parallel/serial(PUS) converting part 21. The part 21 performs P/S conversion in which parallel data is converted into serial data of the data DZY (10) to form serial data DSY based on the data DZY and supplies the data DSY to a transmission signal forming part 22. The part 22 forms an optical signal SLY specifying a wavelength fitting a data transmission line formed by using optical fiber from the data DSY and transmits the signal SLY.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention described in the claims of the present application relates to a plurality of 8-bit word string data based on digital image information data such as luminance signal information data and color difference signal information data forming a digital video signal. And a data transmission apparatus for converting each of a plurality of 8-bit word string data into 10-bit word string data containing word synchronization data and transmitting the converted data, and a data transmission apparatus in which the method is implemented About.

[0002]

2. Description of the Related Art Digital data representing various kinds of signal information is transmitted in a system for transmitting digital data as an electric signal through a transmission line formed by using a coaxial cable or twisted pair line, or a digital data transmission system. There has been proposed a system that converts an optical signal into an optical signal and transmits the optical signal through a transmission line formed using an optical fiber. And
Digital data handled under such a digital data transmission system is, for example, several hundred Mbps to 1 Gbps.
Serial data having a bit transmission rate (bit rate) of about

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 composed, for example, of an 8-bit word string data composed of one word with eight bits on the transmission side. Conversion to the configured 10-bit word string data, that is, 8B / 10B conversion is performed,
This is 0-bit word string data. What is actually transmitted is serial data obtained by further performing a parallel / serial conversion process on the 10-bit word string data thus formed. On the other hand, on the receiving side, serial / parallel conversion processing is performed on the received serial data to form 10-bit word string data, and the 10-bit word string data is returned to the original 8-bit word string data. The conversion from 10-bit word string data in which one word is composed of 10 bits to 8-bit word string data in which one word is composed of 8 bits, that is, 10B / 8B conversion is performed.

In a digital data transmission system such as a fiber channel system, digital data transmitted on a transmission path as 10-bit word string data is, for example, a "frame" as shown in FIG. And the data format in which the smallest independent packet, referred to as, is formed. The “frame” shown in FIG. 32 has a total of 2148 bytes, and includes a 4-byte frame start portion, a 24-byte frame header portion,
An optional header portion having a 64-byte structure, a payload portion having a 2048-byte structure, an error check portion having a 4-byte structure, and a frame end portion having a 4-byte structure are sequentially connected.

[0005] 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 transmission side, a "frame" in which 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 words in such 10-bit word string data, the 10-bit words constituting the 10-bit word string data are those in which the number of “1” is larger than the number of “0”,
If the number of “0” is greater than the number of “1”, or
The number of “1” is equal to the number of “0”. In expressing the respective states of “1” and “0”, for example, running disparity (Running Diparity) is used.
sparity: RD) has been introduced,
When the number of “1” is greater than the number of “0”, the running disparity (RD) is said to be positive, and “0”
Is greater than the number of "1", RD is said to be negative, and when the number of "1" is equal to the number of "0",
Say RD is neutral. Word data in which the number of "1" s is greater than "0" is word data with RD being positive, word data in which the number of "0" is greater than "1" is word data with RD being negative, Word data in which the number of “1” is equal to the number of “0” is word data in which RD is neutral (neutral word data)
Called.

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. It is assumed that 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 word data DS10 having a 10-bit configuration called by a code name of K28.5. FIG.
The word data DS10 having a 10-bit configuration called by the code name 8.5 is shown.
0 indicates that the RD is positive when the CRD, which is the RD based on the word data immediately preceding it, is negative (-).
1111 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 ". .5
And "110000 0101" is -K2
8.5).

[0009] On the other hand, in the field of video signals, digitization has been attempted from the viewpoint of diversifying transmitted information and improving the quality of reproduced images. High Definition Television (HDT
V) Systems and the like have been proposed. A digital video signal such as a digitized video signal under the HDTV system follows a data format as shown in FIG. 34, for example.

The data format of the digital video signal shown in FIG. 34 is a brightness signal data sequence (Y data sequence) representing a brightness signal component in the video signal as shown in FIG. And a color difference signal data sequence (P _B / P _R data sequence) representing a color difference signal component in the video signal, and the Y data sequence and the P _B / P _R data sequence are
It represents luminance signal information data forming a digital video signal and color difference signal information data forming a digital video signal.

Each of the word data forming each of the Y data sequence and the P _B / P _R data sequence has a 10-bit configuration. That is, each of the color difference signal information data represented as luminance signal information data and the P _B / P _R data sequence represented as Y data sequence, quantization with 10-bit word is digital image information data has been made. FIG. 34A shows a horizontal blanking period in each horizontal period in the Y data sequence and a portion corresponding to a part of the video data period before and after the horizontal blanking period, and FIG. It has been shown a portion corresponding to a portion of the video data period in the horizontal blanking period and before and after in each horizontal period in P _B / P _R data sequence.

In the Y data series, immediately before the portion corresponding to each video data period, 4 words (3FF (Y), 000 (Y), 000) each having a 10-bit configuration.
(Y), XYZ (Y)) are provided, and four words each having a 10-bit configuration are provided immediately after a portion corresponding to each video data period. (3FF (Y),
000 (Y), 000 (Y), XYZ (Y)), and timing reference code data (EAV: Endof Active V).
ideo). Similarly, P _B / P _R data be in sequence, just before the portion corresponding to the respective video data period, four words, each of which is a 10-bit configuration (3FF
(C), 000 (C), 000 (C), XYZ (C))
, And four words (3FF (C), 000 (C), 000) each having a 10-bit configuration immediately after the portion corresponding to each video data period.
(C), XYZ (C)). Of course, EAV and SAV Each of the in Y data sequence, Y data is arranged in a portion corresponding to the horizontal blanking period in the sequence, also people P _B / P _R data in the sequence of the EAV and SAV husband, P disposed in a portion corresponding to the horizontal blanking period in _B / P _R data sequence.

[0013] In the digital video signal according to the data format consisting of such Y data sequence and P _B / P _R data sequence is transmitted, Y data sequence and P _B /
The P _R data sequence, the word multiplexing process at Moto the portion corresponding to the horizontal blanking period, each of EAV are disposed has been made to the synchronization is performed, the word multiple data series as shown in FIG. 35 formed Is done. Then, the digital video signal converted into a 10-bit quantized digital signal according to the word multiplexed data sequence is converted into serial data and transmitted.

[0014] For transmission of digital video signals according to the word multiple data sequence based on such Y data sequence and P _B / P _R data sequence is also at the transmitting side, based on the data representing the digital video signal to be transmitted word The 8-bit word string data to which the synchronization data is added is formed, and the 8-bit word string data is 8B / 10
In order to perform the transmission by converting the data into 10-bit word string data by the B conversion and transmitting the data, for example, an existing integrated circuit element (IC element) or the like can be effectively used in configuring a transmission / reception circuit. From a point of view, this is what we want.

[0015]

SUMMARY OF THE INVENTION Y data series and P _B
/ P when _R digital video signal according to the word multiple data sequence based on the data sequence is transmitted by being converted into serial data, the serial data transmission rate,
In the past, the speed was set to 1.485 Gbps, for example, but in the future, it is expected that the speed will be extremely high, which is equivalent to, for example, twice the conventional value.

As described above, on the transmitting side, 8-bit word string data to which word synchronization data is added is formed based on data representing a digital video signal to be transmitted, and the 8-bit word string data is 8B / 10
In a situation where it is desired to transmit a digital video signal using a transmission method which is converted into 10-bit word string data by B conversion and transmitted, the Y data sequence and P _B / P _R
Considering that the serial data transmission rate at which the digital video signal according to the word multiplex data sequence based on the data sequence is converted into serial data and transmitted is expected to be extremely high in the future, If the data representing a signal can be transmitted not only as single channel data but also the data representing a digital video signal can be divided into multiple channel data and multiplexed, the serial data transmission rate will be extremely high. As for the video signal, for example, it is possible to transmit the digital video signal by using a transmission / reception circuit configured by effectively using existing IC elements and the like, and the digital video signal can be efficiently used. Expansion of digital video signal usage range It becomes Rukoto. Efficient use of digital video signals, expansion of the range of use of digital video signals, and the like, for example, will result in further development of technology in the field of business or household electronic devices.

However, conventionally, on the transmitting side, 8-bit word string data to which word synchronization data is added is formed based on data representing a digital video signal to be transmitted, and the 8-bit word string data is formed. A specific example of realizing a transmission system capable of dividing data representing a digital video signal into a plurality of channel data and performing multiplex transmission by using a transmission system which is converted into 10-bit word string data by 8B / 10B conversion and transmitted. Is not found. Further, there is no literature or the like which describes a technique relating to a transmission system capable of dividing data representing such a digital video signal into a plurality of channel data and performing multiplex transmission.

In view of the above, the invention described in the claims of the present application forms 8-bit word string data to which word synchronization data is added based on data representing a digital video signal to be transmitted. , The 8-bit word string data is converted into 10-bit word string data including 10-bit word data based on data representing a digital video signal and 10-bit word synchronization data by 8B / 10B conversion. A data transmission method capable of dividing data representing a digital video signal into a plurality of channel data and performing multiplex transmission by a transmission method in which column data is transmitted so as to be transmitted, and a data transmission apparatus in which the data transmission method is implemented I will provide a.

[0019]

The data transmission method according to any one of the first to tenth aspects of the present invention provides a method for transmitting data to first and second digital image information data. First and second 8-bit word string data are obtained based on the first and second 8-bit word string data, respectively.
An additional word data group including specific word synchronization data which is 8-bit word data having a preset code is inserted into each of the bit word string data at predetermined word intervals, and the additional word data group is Bit conversion of each of the inserted first and second 8-bit word string data into 10-bit word string data is performed, and is obtained based on the specific word synchronization data.
Forming first and second composite 10-bit word string data having a portion based on the additional word data group, including 10-bit word synchronization data having a predetermined positive or negative RD; And the second composite 10
The bit word string data is converted into first and second serial data, respectively, and transmitted to transmit the first and second serial data, respectively.

The first and second digital image information data are, for example, luminance signal information data and color difference signal information data which form a digital video signal, respectively, or the first digital image information data is Two of the first, second and third primary color signal information data forming the digital video signal
Is the remaining one of the first, second and third primary color signal information data.

The data transmission method according to any one of the eleventh to sixteenth aspects of the present invention provides a luminance signal information data and a chrominance signal information data for forming a digital video signal. Is performed to obtain a plurality of 8-bit word string data, and each of the plurality of 8-bit word string data is separated from the 8-bit word string data having a predetermined code by a predetermined word interval. Insert an additional word data group containing the specified word synchronization data
By performing bit conversion on each of the plurality of 8-bit word string data into which the additional word data group is inserted into 10-bit word string data, the RD obtained based on the specific word synchronization data is set to a predetermined positive or negative value. Multiple composites 10 having a portion based on additional word data groups, including negative 10-bit word synchronization data
Forming bit word string data,
Each of the 0-bit word string data is converted into serial data, and each of the plurality of serial data is transmitted for transmission.

Further, in the data transmission apparatus according to the invention described in claim 17 of the present application, the first and second 8-bit word strings based on the first and second digital image information data, respectively. First and second 8-bit word string forming means for obtaining data; and word data sending means for sending an additional word data group including specific word synchronization data converted to 8-bit word data having a preset code. , An additional word data group sent from the word data sending means is inserted into each of the first and second 8-bit word string data obtained from the first and second 8-bit word string forming means. Bit conversion of each of the first and second 8-bit word string data into which the group has been inserted into 10-bit word string data is performed. Therefore, the first and second portions each having a portion based on the additional word data group, including 10-bit word synchronization data having a predetermined positive or negative running disparity obtained based on the specific word synchronization data. First and second 10-bit word string data forming means for forming two composite 10-bit word string data, and first and second compound 10 data obtained from the first and second 10-bit word string data forming means. Data transmission means for converting the bit word string data into first and second serial data, respectively, and transmitting the first and second serial data for transmission.

According to the data transmission method according to any one of the first to tenth aspects of the present invention as described above, the data is transmitted to be transmitted. Are luminance signal information data and color difference signal information data forming a digital video signal, or first, second and third data forming a digital video signal.
RD is assigned to each of the first and second composite 10-bit word string data based on the first and second digital image information data, which are two of the primary color signal information data and the remaining one. This means that predetermined 10-bit word synchronization data, which is positive or negative, is included. Such 10-bit word synchronization data is, for example, + K28.5 which is the word data DS10 having RD positive or the word data DS10 having RD negative.
K28.5. And the first and second composites 10
The RD of the 10-bit word synchronization data included in each of the bit word string data is determined by the word synchronization data detection on the receiving side that receives the transmitted first and second composite 10-bit word string data, where the RD is positive. The value is set in advance to be positive or negative depending on whether only synchronous data is detected or only word synchronous data with RD being negative is detected.

Each of the first and second composite 10-bit word string data based on the first and second digital image information data, which is transmitted to be transmitted as described above, is transmitted to the receiving side by the word synchronizing data. Regardless of whether the detection is performed by detecting only the word synchronization data with RD being positive, or the detection is performed by detecting only the word synchronization data with RD being negative, on the receiving side, The 10-bit word synchronization data is
It is assumed that the data is properly detected as word synchronization data required for conversion from 10-bit word string data to 8-bit word string data. Therefore, on the receiving side, data synchronization required for processing for reproducing the first and second digital image information data based on the received first and second composite 10-bit word string data is provided. A state where the state can be reliably obtained is secured.

That is, according to the data transmission method according to any one of the first to tenth aspects of the present invention, each of the first and second digital image information data is The luminance signal information data and the color difference signal information data forming the digital video signal, or two of the first, second and third primary color signal information data forming the digital video signal and the remaining data. When the number is one, 8-bit word string data to which word synchronization data is added is formed based on data representing a digital video signal to be transmitted, and the 8-bit word string data is converted into a digital signal by 8B / 10B conversion. A 10-bit word string including 10-bit word data and 10-bit word synchronization data based on data representing a video signal It is converted to over data, with a transmission scheme in which the 10-bit word sequence data are transmitted to be transmitted, so that it is possible to multiplex by dividing the data representing the digital image signal into a plurality of channels data.

According to the data transmission method according to any one of the eleventh to sixteenth aspects of the present invention, a digital video signal to be transmitted is formed. For each of the plurality of composite 10-bit word string data based on the plurality of 8-bit word string data obtained by the bit division processing of the luminance signal information data and the color difference signal information data, RD is set to a predetermined positive or negative value. 10-bit word synchronous data. Such 10-bit word synchronization data is, for example, + K28.5 or RD, which is word data DS10 with RD being positive.
Is -K28.5, which is the word data DS10 in which is negative. Then, the RD of the 10-bit word synchronization data included in each of the plurality of composite 10-bit word string data is determined by the word synchronization data detection on the receiving side that receives the transmitted composite 10-bit word string data to indicate that RD is positive. It is set to be positive or negative in advance depending on whether only the word synchronization data to be detected is detected or only the word synchronization data having a negative RD is detected.

Each of the plurality of composite 10-bit word string data based on the plurality of 8-bit word string data transmitted to be transmitted as described above is received by the receiving side to detect the word synchronization data and to set RD to positive. Or by detecting only the word synchronization data
In any case where the detection is performed by detecting only the word synchronization data having a negative value on the receiving side,
It is assumed that the 10-bit word synchronization data is properly detected as word synchronization data required for conversion from 10-bit word string data to 8-bit word string data and the like. Therefore, on the receiving side,
A state in which a data synchronization state required for a process for reproducing a plurality of 8-bit word string data based on a plurality of received composite 10-bit word string data is reliably obtained.

That is, according to the data transmission method according to any one of the eleventh to sixteenth aspects of the present invention, based on the data representing the digital video signal to be transmitted, 8-bit word string data to which word synchronization data is added is formed,
The 8-bit word string data is converted into a 10-bit data based on data representing a digital video signal by 8B / 10B conversion.
The data is converted into 10-bit word string data including bit word data and 10-bit word synchronization data.
According to a transmission method in which bit word string data is transmitted to be transmitted, data representing a digital video signal can be divided into a plurality of channel data and multiplexed.

Further, in the data transmission apparatus according to the invention described in claim 17 of the present application, for example, each digital video signal transmitted to be transmitted by the data transmitting means is transmitted. The luminance signal information data and the color difference signal information data to be formed, or two and the remaining one of the first, second, and third primary color signal information data that form the digital video signal.
First based on the first and second digital image information data
And the second composite 10-bit word string data,
This means that 10-bit word synchronization data with RD being predetermined positive or negative is included. Such 10-bit word synchronization data is, for example, + K28.5 which is the word data DS10 whose RD is positive, or -K2 which is the word data DS10 whose RD is negative.
8.5. The RD of the 10-bit word synchronization data included in each of the first and second composite 10-bit word string data is the transmitted first and second composite 10-bit word data.
Whether the word synchronization data detection on the receiving side receiving the bit word string data detects only the word synchronization data having RD as positive or only the word synchronization data having RD as negative. Depending on,
It is set to positive or negative in advance.

Each of the first and second composite 10-bit word string data based on the first and second digital image information data, which are transmitted to be transmitted as described above, is transmitted to the word synchronizing data by the receiving side. Regardless of whether the detection is performed by detecting only the word synchronization data with RD being positive, or the detection is performed by detecting only the word synchronization data with RD being negative, on the receiving side, The 10-bit word synchronization data is
It is assumed that the data is properly detected as word synchronization data required for conversion from 10-bit word string data to 8-bit word string data. Therefore, on the receiving side, data synchronization required for processing for reproducing the first and second digital image information data based on the received first and second composite 10-bit word string data is provided. A state where the state can be reliably obtained is secured.

That is, according to the data transmission apparatus of the invention described in claim 17 of the present application, the first and second digital image information data each have a luminance for forming a digital video signal. When the signal information data and the color difference signal information data are used, or when two of the first, second, and third primary color signal information data forming the digital video signal and the remaining one are used, transmission is performed. An 8-bit word string data to which word synchronization data is added is formed based on data representing a digital video signal to be performed, and the 8-bit word string data is converted into an 8-bit word string data based on data representing a digital video signal by 8B / 10B conversion. It is converted into 10-bit word string data including bit word data and 10-bit word synchronization data, With transmission method Ttowado column data is sent to be transmitted, so that it is possible to multiplex by dividing the data representing the digital image signal into a plurality of channels data.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a data transmission method according to the present invention described in any one of the first to tenth aspects of the present invention. An example of a data transmission device according to the invention described in claim 17 in the range of FIG.

In the example shown in FIG.
Luminance signal information data and color difference signal information forming a video signal
34A and B of FIG.
Y data series and P_B/ P_RY data like data series
Data series DYV and P_B/ P _ROf the data series DCV
Is the first digital image information data.
To the 8-bit word string data forming unit 10 as data
Is done. Y data series DYV indicates the word transmission rate, for example.
For example, a 10-bit quantization
Digital data.

The 8-bit word string data forming section 10 has Y
The horizontal synchronizing signal SH related to the data sequence DYV is also supplied, and the 8-bit word string data forming unit 10 uses the horizontal synchronizing signal SH as a reference timing.
The Y data series DYV is converted to a word transmission rate of, for example, 9
The data is converted into first 8-bit word string data DXY (8) having 2.8125 MBps. 8-bit word string data D obtained in 8-bit word string data forming unit 10
XY (8) is supplied to the 10-bit word string data forming unit 11.

In the 10-bit word string data forming section 11, 8-bit word string data DXY (8) is supplied to the speed conversion / synchronization data inserting section 12. The speed conversion / synchronous data insertion unit 12 includes a word data transmission unit 1
3 provides an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 12
, The word transmission rate is 92.8125 MBps
For 8-bit word string data DXY (8)
The word transmission rate is, for example, 92.8125 MBp
s is converted to 106.25 MBps, and an additional word data group DWS including 8-bit word synchronization data from the word data transmission unit 13 is inserted at a predetermined word interval.
The word transmission rate is set to 106.
Compound 8-bit word string data DZY at 25 MBps
Form (8).

FIG. 2 shows the speed conversion / synchronous data insertion unit 12
The following is a specific configuration example of. In the example shown in FIG. 2, 8-bit word string data DXY (8) based on Y data series DYV is supplied to switch 15. The switch 15 performs switching every predetermined period, for example, every 1 ms according to the control signal CSA.
The 8-bit word string data DXY (8) is alternately supplied to the memory section 16 and the memory section 17 every 1 ms, and the memory section 1 for the 8-bit word string data DXY (8) is supplied.
6 and the memory unit 17 are distributed.

A memory control signal forming unit 18 is provided in association with the memory unit 16 and the memory unit 17.
A clock signal CA having a frequency of 74.25 MHz and a clock signal CB having a frequency of 106.25 MHz are supplied to the memory control signal forming section 18 in synchronization with the clock signal of the 8-bit word string data DXY (8). Is done. Then, the memory control signal forming unit 18 sets the frequency to 92.8125 MH based on the clock signal CA.
z, and generates a read control signal QR having a frequency of 106.25 MHz based on the clock signal CB, and stores the write control signal QW and the read control signal QR in the memory unit 16. And the memory unit 17.

Thus, in the memory section 16, the 8-bit word string data DXY is passed through the switch 15.
In the period in which (8) is supplied, the word transmission speed of the 8-bit word string data DXY (8) becomes 9 according to the write control signal QW having a frequency of 92.8125 MHz.
Writing is performed in a state of 2.8125 MBps. Also in the memory unit 17, 8
During the period in which the bit word string data DXY (8) is supplied, the word transmission rate of the 8-bit word string data DXY (8) is 92.8125 MBps according to the write control signal QW having a frequency of 92.8125 MHz. It is written in the state where it does. Accordingly, the writing of the 8-bit word string data DXY (8) in the memory unit 16 and the memory unit 17 at the word transmission speed of 92.8125 MBps is performed alternately for 1 ms in accordance with the switching of the switch 15 every 1 ms. Will be

The 8-bit word string data DXY (8) written into the memory section 16 for 1 ms is read out during the next 1 ms in accordance with the read control signal QR having a frequency of 106.25 MHz. , The word transmission rate is 106.
8-bit word string data DXY '(8) with 25 MBps
Is read from the memory unit 16 and supplied to the switch 19. Also, the 8-bit word string data DXY (8) written in the memory unit 17 for 1 ms also has the frequency of 106.25 MHz during the next 1 ms according to the read control signal QR. Word transmission rate of 10
8-bit word string data DX with 6.25 MBps
Y ′ (8) is read from the memory unit 17 and the switch 1
9. The switch 19 is also supplied with the additional word data group DWS from the word data sending unit 13. The additional word data group DWS has a word transmission rate of 106.25 MBps.

The switch 19 controls the word transmission rate from the word data transmission unit 13 to 1 according to the control signal CSB.
Additional word data group D with 06.25 MBps
WS, 8-bit word string data D having a word transmission rate of 106.25 MBps read from the memory unit 17
XY ′ (8) and 8-bit word string data DXY ′ (8) read from the memory unit 16 and having a word transmission rate of 106.25 MBps are sequentially extracted for a predetermined word period. Thus, the switch 19 adds an additional word data group having a word transmission rate of 106.25 MBps to the 8-bit word string data DXY ′ (8) whose word transmission rate has been converted to 106.25 MBps at a predetermined word interval. The composite 8-bit word string data DZY (8) formed by inserting the DWS is derived.

The additional word data group DWS having a word transmission rate of 106.25 MBps from the word data transmission unit 13 is composed of a plurality of 8-bit data words including 8-bit word synchronization data. In each of the portion and the end portion, three 8-bit word synchronization data DEK8 and three 8-bit auxiliary word data DEA8 are alternately arranged, and the portion between the start end portion and the end portion has the It is assumed that at least one 8-bit word data in which the RD of the last word data is inverted with respect to the RD of the last 8-bit word synchronization data DEK8 in the start end portion is arranged.

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

On the other hand, 8-bit auxiliary word data DEA8
Is 8-bit word data represented by "01110101" as shown in FIG. 3. When converted into 10-bit word data, it is called by a code name of D21.3. D21.3 is “101010 11 when the CRD, which is the RD based on the word data arranged immediately before, is negative (−), and the RD is neutral.
00 ", and when the CRD, which is the RD based on the word data immediately preceding it, is positive (+), it is set to" 1010100011 ", which makes the RD neutral.

Such an additional word data group DW
The composite 8-bit word string data DZY (8) formed by inserting S is added to the additional word data group DWS.
Is inserted as shown in FIG. 4A. In FIG. 4A, DY8 represents 8-bit word data forming 8-bit word string data DXY '(8) read from each of the memory units 16 and 17 shown in FIG. / 10B conversion gives 10
This is set as bit word data DY10.

The additional word data group DWS having a word transmission rate of 106.25 MBps from the word data transmission unit 13 includes, for example, at least one arbitrary 8-bit word data DEX8 and 8-bit word synchronization data DEK8. 8-bit auxiliary word data DEA8
Are alternately arranged three by three, and further, at least one arbitrary 8-bit word data DEX8 is continuously formed. When the arbitrary 8-bit word data DEX8 is converted into 10-bit word data, the 10-bit word data DXX. X.

Such an additional word data group DW
The composite 8-bit word string data DZY (8) formed by inserting S is added to the additional word data group DWS.
Is inserted as shown in FIG. 5A. Also in FIG. 5A, DY8 represents each 8-bit word data forming the 8-bit word string data DXY ′ (8) read from each of the memory units 16 and 17 shown in FIG. 1 by 8B / 10B conversion
This is set to 0-bit word data DY10.

As described above, the composite 8-bit word string data DZY (8) formed in the speed conversion / synchronization data insertion unit 12 is supplied to the 8B / 10B conversion unit 20. The 8B / 10B conversion unit 20 performs an 8B / 10B conversion for converting the 8-bit word data to the 10-bit word data on the composite 8-bit word string data DZY (8), and performs the composite 8-bit word string data DZY ( 8), the first composite 10-bit word string data DZY (1
0) is formed. At this time, the 8-bit word synchronization data D
EK (8) is converted to K28.5, 8-bit auxiliary word data DEA (8) is converted to D21.3, and arbitrary 8-bit word data DEX8 is set to 1
0-bit word data DXX. Converted to X.

Composite 8-bit word string data DZY (8)
The additional word data group DWS inserted in FIG.
A, the composite 10-bit word string data DZY (10) is such that the 10-bit word data DY10 immediately before the portion based on the additional word data group DWS has its RD set to positive (+). When you do
4B. On the other hand, when the 10-bit word data DY10 immediately before the portion based on the additional word data group DWS has its RD negative (-), it is shown in FIG. 4C. It is assumed to be.

The composite 8-bit word string data DZY
Additional word data group DWS inserted in (8)
Is as shown in FIG. 5A, the composite 1
When the 10-bit word data DY10 immediately before the portion based on the additional word data group DWS has its RD set to positive (+), the 0-bit word string data DZY (10) is as shown in FIG. And, on the other hand,
When the RD of the 10-bit word data DY10 immediately before the portion based on the additional word data group DWS is negative (-), the data is as shown in FIG. 5C.

The composite 10-bit word string data DZY (10) formed in the 8B / 10B conversion section 20 is 1
The data is sent from the 0-bit word string data forming unit 11 and supplied to the parallel / serial (P / S) conversion unit 21.
In the P / S converter 21, the composite 10-bit word string data DZY (10) is subjected to P / S conversion for converting parallel data into serial data, and is converted into composite 10-bit word string data DZY (10). Based serial data D
SY is formed, and the serial data DSY is supplied to the transmission signal forming unit 22. In the transmission signal forming unit 22,
To transmit the serial data DSY through, for example, a data transmission line formed using optical fiber, a wavelength suitable for the data transmission line formed using optical fiber based on the serial data DSY is used. For example, an optical signal SL of 1.3 μm
Form Y and send. Then, the optical signal SLY obtained from the transmission signal forming unit 22 is supplied to, for example, a multiplexing unit 23 which is a multiplexing unit.

Also, the Y data series and P _B shown in FIGS. 34A and 34B, which represent the luminance signal information data and the color difference signal information data forming the digital video signal, respectively.
/ P _R data series, such as Y data series DYV and P
_The P _B / P _R data series DCV of the _B / P _R data series DCV is used as the second digital image information data.
The data is supplied to the 8-bit word string data forming unit 25. P _B
/ P _R data sequence DCV also a word transmission rate, for example, a 10-bit quantized digital data to 74.25 MBps.

The 8-bit word string data forming section 25 has P
Horizontal synchronizing signal SH involved in _B / P _R data sequence DCV
Is also supplied, in the 8-bit word sequence data forming section 25, in the original on the basis timing of the horizontal synchronizing signal SH, the P _B / P _R data sequence DCV, a word transmission rate, for example, the 92.8125MBps Second eight
It is converted into bit word string data DXC (8). The 8-bit word string data DXC (8) obtained in the 8-bit word string data forming unit 25 is supplied to the 10-bit word string data forming unit 26.

In the 10-bit word string data forming section 26, the 8-bit word string data DXC (8) is supplied to the speed conversion / synchronization data inserting section 27. The speed conversion / synchronous data insertion unit 27 includes a word data transmission unit 2.
8 provides an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 27
, The word transmission rate is 92.8125 MBps
For 8-bit word string data DXC (8)
The word transmission rate is, for example, 92.8125 MBp
s is converted to 106.25 MBps, and an additional word data group DWS including 8-bit word synchronization data from the word data transmission unit 28 is inserted at a predetermined word interval.
Based on _B / P _R data sequence DCV, to form a composite 8-bit word sequence data DZC (8) for the word transmission rate and 106.25MBps.

FIG. 6 shows a speed conversion / synchronous data insertion unit 27.
The following is a specific configuration example of. In the example shown in FIG. 6, 8-bit word string data DXC (8) based on P _B / P _R data series DCV is supplied to switch 29. The switch 29 performs switching every predetermined period, for example, every 1 ms in accordance with the control signal CSA, thereby changing the 8-bit word string data DXC (8) to 1 ms.
The data is alternately supplied to the memory unit 30 and the memory unit 31 at every interval, and the distribution of the 8-bit word string data DXC (8) to the memory unit 30 and the memory unit 31 is performed.

A memory control signal forming unit 32 is provided in association with the memory units 30 and 31.
The memory control signal forming unit 32 includes a clock signal CA for setting the frequency synchronized with the word clock signal in the 8-bit word string data DXC (8) to 74.25 MHz,
A clock signal CB having a frequency of 106.25 MHz is supplied. Then, the memory control signal forming unit 32
The frequency is set to 92.8125 based on the clock signal CA.
MHz and a frequency of 106.25 MHz based on the clock signal CB.
z, a read control signal QR is generated, and a write control signal QW
And the read control signal QR to the memory unit 30 and the memory unit 31
Supply to both.

Thus, in the memory unit 30, the 8-bit word string data DXC
In the period in which (8) is supplied, the word transmission speed of the 8-bit word string data DXC (8) becomes 9 according to the write control signal QW having a frequency of 92.8125 MHz.
Writing is performed in a state of 2.8125 MBps. Also, in the memory unit 31, 8
During the period in which the bit word string data DXC (8) is supplied, the 8-bit word string data DXC (8) has a word transmission rate of 92.8125 MBps according to the write control signal QW having a frequency of 92.8125 MHz. It is written in the state where it does. Therefore, the writing of the 8-bit word string data DXC (8) in the memory unit 30 and the memory unit 31 at the word transmission speed of 92.8125 MBps is performed alternately for 1 ms in accordance with the switching of the switch 29 every 1 ms. Is

The 8-bit word string data DXC (8) written to the memory unit 30 for 1 ms is read in accordance with the read control signal QR having a frequency of 106.25 MHz during the next 1 ms. , The word transmission rate is 106.
8-bit word string data DXC '(8) with 25 MBps
From the memory unit 30 and supplied to the switch 33. Also, the 8-bit word string data DXC (8) written into the memory unit 31 for 1 ms also has a frequency of 106.25 MHz during the next 1 ms according to the read control signal QR. Word transmission rate of 10
8-bit word string data DX with 6.25 MBps
C ′ (8) is read from the memory unit 31 and the switch 3
3 is supplied. The switch 33 is also supplied with the additional word data group DWS from the word data transmission unit 28. The additional word data group DWS has a word transmission rate of 106.25 MBps.

The switch 33 sets the word transmission rate from the word data transmitting section 28 to 1 in response to the control signal CSB.
Additional word data group D with 06.25 MBps
WS, 8-bit word string data D having a word transmission rate of 106.25 MBps read from the memory unit 31
XC ′ (8) and 8-bit word string data DXC ′ (8) read from the memory unit 30 and having a word transmission rate of 106.25 MBps are sequentially extracted for a predetermined word period. As a result, the switch 33 adds an additional word data group having a word transmission rate of 106.25 MBps to the 8-bit word string data DXC '(8) whose word transmission rate has been converted to 106.25 MBps at a predetermined word interval. The composite 8-bit word string data DZC (8) formed by inserting the DWS is derived.

The additional word data group DWS having a word transmission rate of 106.25 MBps from the word data transmitting unit 28 is constituted by a plurality of 8-bit data words including 8-bit word synchronization data. In each of the portion and the end portion, three 8-bit word synchronization data DEK8 and three 8-bit auxiliary word data DEA8 are alternately arranged, and the portion between the start end portion and the end portion has the It is assumed that at least one 8-bit word data in which the RD of the last word data is inverted with respect to the RD of the last 8-bit word synchronization data DEK8 in the start end portion is arranged.

Such an additional word data group DW
S is inserted to form the composite 8-bit word string data DZC (8).
Is inserted as shown in FIG. 7A. In FIG. 7A, DC8 represents each 8-bit word data forming the 8-bit word string data DXC '(8) read from each of the memory units 30 and 31 shown in FIG. / 10B conversion gives 10
The bit word data is DC10.

The additional word data group DWS having a word transmission rate of 106.25 MBps from the word data transmission unit 28 is composed of, for example, at least one arbitrary 8-bit word data DEX8, and 8-bit word synchronization data DEK8. 8-bit auxiliary word data DEA8
Are alternately arranged three by three, and further, at least one arbitrary 8-bit word data DEX8 is continuously formed. When the arbitrary 8-bit word data DEX8 is converted into 10-bit word data, the 10-bit word data DXX. X.

Such an additional word data group DW
S is inserted to form the composite 8-bit word string data DZC (8).
Is inserted as shown in FIG. 8A. Also in FIG. 8A, DC8 represents each 8-bit word data forming the 8-bit word string data DXC '(8) read from each of the memory units 30 and 31 shown in FIG. 1 by 8B / 10B conversion
This is set to 0-bit word data DC10.

As described above, the composite 8-bit word string data DZC (8) formed in the speed conversion / synchronization data insertion section 27 is supplied to the 8B / 10B conversion section 34. The 8B / 10B conversion unit 34 performs an 8B / 10B conversion for converting the 8-bit word data into the 10-bit word data on the composite 8-bit word string data DZC (8), thereby obtaining the composite 8-bit word string data DZC (8). 8) based on the second composite 10-bit word string data DZC (1
0) is formed. At this time, the 8-bit word synchronization data D
EK (8) is converted to K28.5, 8-bit auxiliary word data DEA (8) is converted to D21.3, and arbitrary 8-bit word data DEX8 is set to 1
0-bit word data DXX. Converted to X.

Composite 8-bit word string data DZC (8)
The additional word data group DWS inserted in FIG.
A, the composite 10-bit word string data DZC (10) is such that the 10-bit word data DC10 immediately before the portion based on the additional word data group DWS has its RD being positive (+) When you do
7B. On the other hand, when the 10-bit word data DC10 immediately before the portion based on the additional word data group DWS has its RD negative (-), it is shown in FIG. 7C. It is assumed to be.

The composite 8-bit word string data DZC
Additional word data group DWS inserted in (8)
Is as shown in FIG. 8A, the composite 1
When the 10-bit word data DC10 immediately before the portion based on the additional word data group DWS makes its RD positive (+), the 0-bit word string data DZC (10) is as shown in FIG. On the other hand,
When the RD of the 10-bit word data DC10 immediately before the portion based on the additional word data group DWS has a negative (-) value, the data is as shown in FIG. 8C.

The composite 10-bit word string data DZC (10) formed in the 8B / 10B conversion section 34 is 1
Sent from the 0-bit word string data forming unit 26,
/ S converter 35. In the P / S converter 35, the composite 10-bit word string data DZC (10)
P / S that converts parallel data into serial data
After conversion, the composite 10-bit word string data DZC
The serial data DSC based on (10) is formed, and the serial data DSC is supplied to the transmission signal forming unit 36. In the transmission signal forming unit 36, the serial data D
To transmit the SC through, for example, a data transmission line formed using optical fiber, a wavelength suitable for the data transmission line formed using optical fiber based on the serial data DSC,
For example, an optical signal SLC of 1.55 μm is formed and transmitted. Then, the optical signal SLC obtained from the transmission signal forming unit 36 is supplied to, for example, the multiplexing unit 23 which is a multiplexing unit.

In multiplexing section 23, transmission signal forming section 2
2 and the optical signal SLC obtained from the transmission signal forming unit 36, for example, are subjected to a multiplexing process, which is a multiplexing process, to form a multiplexed optical signal SLT. The data is transmitted to a data transmission path formed using optical fibers. Thereby,
Transmission of serial data DSY and serial data DSC is performed.

FIG. 9 shows an example of a data transmission apparatus in which another example of the data transmission method according to any one of the first to tenth aspects of the present invention is implemented. .

In the example shown in FIG. 9, among the blue primary color signal information data DBV, green primary color signal information data DGV and red primary color signal information data DRV forming the digital video signal, the blue primary color signal information data DBV and green primary color The signal information data DGV is used as the first digital image information data as an 8-bit word string data forming unit 40.
Supplied to Each of the blue primary color signal information data DBV and the green primary color signal information data DGV is 10-bit quantized digital data having a word transmission rate of, for example, 13.5 MBps.

The 8-bit word string data forming section 40 includes:
The horizontal synchronization signal SH relating to each of the blue primary color signal information data DBV and the green primary color signal information data DGV is also supplied. In the 8-bit word string data forming section 40, the horizontal synchronization signal SH is used as a reference timing.
The blue primary color signal information data DBV and the green primary color signal information data DGV are converted to a word transmission rate of, for example, 33.75.
First 8-bit word string data DBG with MBps
Convert to (8). 8-bit word string data forming unit 40
8-bit word string data DBG (8) obtained in
Is supplied to the 10-bit word string data forming unit 41.

In the 10-bit word string data forming section 41, the 8-bit word string data DBG (8) is supplied to the speed conversion / synchronization data inserting section. The speed conversion / synchronization data insertion unit 42 includes a word data transmission unit 4.
3 provides an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 42
, The word transmission rate of the 8-bit word string data DBG (8) having a word transmission rate of 33.75 MBps is, for example, 33.75 MBps to 5
3. While performing speed conversion to convert to 125 MBps, the word data sending unit 4
3 to add the additional word data group DWS including the 8-bit word synchronization data, whereby the blue primary color signal information data DBV and the green primary color signal information data DG
Based on V, compound 8-bit word string data DZBG (8) having a word transmission rate of 53.125 MBps is formed.

FIG. 10 shows the speed conversion / synchronous data insertion unit 4
2 shows a specific configuration example. In the example shown in FIG. 10, 8-bit word string data DBG (8) based on the blue primary color signal information data DBV and the green primary color signal information data DGV is supplied to the switch 45. The switch 45 performs switching every predetermined period, for example, every 1 ms in response to the control signal CSA, thereby changing the 8-bit word string data DBG (8) to the memory 46 and the memory 47 to the memory unit 46 and the memory unit 47 for the 8-bit word string data DBG (8).

A memory control signal forming section 48 is provided in association with the memory section 46 and the memory section 47.
The memory control signal forming section 48 has a frequency of 13.5 synchronized with the word clock signal in each of the blue primary color signal information data DBV and the green primary color signal information data DGV.
MHz and a frequency of 53.12
A clock signal CB having a frequency of 5 MHz is supplied. The memory control signal forming section 48 generates a write control signal QW having a frequency of 33.75 MHz based on the clock signal CA, and performs a read control having a frequency 53.125 MHz based on the clock signal CB. Signal Q
R is generated, and the write control signal QW and the read control signal QR are supplied to both the memory unit 46 and the memory unit 47.

Thus, in memory section 46, 8-bit word string data DBG
In the period in which (8) is supplied, the word transmission rate of the 8-bit word string data DBG (8) is set to 33.7 according to the write control signal QW having the frequency of 33.75 MHz.
The data is written in a state of 5 MBps. Also, in the memory unit 47, during the period in which the 8-bit word string data DBG (8) is supplied through the switch 45, the frequency of the 8-bit word string data DBG (8) is 33.7.
According to the write control signal QW of 5 MHz, writing is performed in a state where the word transmission rate is 33.75 MBps.
Therefore, the word transmission speed of the 8-bit word string data DBG (8) in the memory units 46 and 47 is set to 3
When writing at 3.75 MBps, switch 4
5 are alternately performed for 1 ms in accordance with the switching every 1 ms.

The 8-bit word string data DBG (8) written into the memory unit 46 for 1 ms is supplied with the read control signal QR having a frequency of 53.125 MHz during the next 1 ms. , Word transmission rate 53.1
8-bit word string data DBG '(8) with 25 MBps
Is read from the memory unit 46 and supplied to the switch 49. Also, the 8-bit word string data DBG (8) written into the memory unit 47 for 1 ms also has a frequency of 53.125 MHz during the next 1 ms according to the read control signal QR. Word transmission speed of 5
8-bit word string data DX with 3,125 MBps
Y ′ (8) is read from the memory unit 47 and the switch 4
9. The switch 49 is also supplied with the additional word data group DWS from the word data transmission unit 43. The word transmission rate of the additional word data group DWS is 53.125 MBps.

The switch 49 controls the word transmission rate from the word data transmission section 43 to 5 in response to the control signal CSB.
Additional word data group D with 3.125 MBps
WS, 8-bit word string data D having a word transmission rate read from the memory unit 47 of 53.125 MBps
BG ′ (8) and 8-bit word string data DBG ′ (8) read from the memory unit 46 and having a word transmission rate of 53.125 MBps are sequentially extracted for a predetermined word period. Thus, the switch 49 adds the additional word data having a word transmission rate of 53.125 MBps to the 8-bit word string data DBG '(8) whose word transmission rate has been converted to 53.1 25 MBps at a predetermined word interval. The composite 8-bit word string data DZBG (8) formed by inserting the group DWS is derived.

The additional word data group DWS having a word transmission rate of 53.125 MBps from the word data transmitting section 43 is constituted by a plurality of 8-bit data words including 8-bit word synchronization data. 8 in any 8-bit word data DEX8
The 8-bit word synchronization data DEK8 is followed by the 8-bit word synchronization data DEK8, followed by an arbitrary 8-bit word data DEX8, and the 8-bit word synchronization data DEK8 immediately before the 8-bit word synchronization data DEK8.
Are set to be 10-bit word data DXX.X in which RD is negative (-) when 8B / 10B converted.

The additional word data group DW
The composite 8-bit word string data DZBG (8) formed by inserting the S is added to the additional word data group DW
The portion where S is inserted is as shown in FIG. DBG8 is the 8-bit word string data D read from each of the memory units 46 and 47 shown in FIG.
Each of the 8-bit word data forming BG '(8) is represented, and is converted into 10-bit word data DBG10 by 8B / 10B conversion.

The additional word data group DWS having a word transmission rate of 53.125 MBps from the word data transmitting section 43 has, for example, a predetermined number of arbitrary 8-bit word data DEX8 added to the first 8-bit word synchronization data DEK8. Subsequently, the second 8-bit word synchronization data DEK8 is added to the arbitrary 8-bit word data DEX8.
The second 8-bit word synchronization data DEK8 is followed by an arbitrary 8-bit word data DEX8, and the second 8-bit word synchronization data DEK8
Is 8-bit word data DEX8 immediately before 8B / 10
It is set to be 10-bit word data DXX.X with RD being negative (-) when B-converted.

The additional word data group DW
The composite 8-bit word string data DZBG (8) formed by inserting the S is added to the additional word data group DW
The portion where S is inserted is as shown in FIG.

As described above, the composite 8-bit word string data DZBG (8) formed in the speed conversion / synchronization data insertion unit 42 is supplied to the 8B / 10B conversion unit 50. The 8B / 10B converter 50 converts the 8-bit word data into 10-bit word data into the composite 8-bit word string data DZBG (8).
B-converted, and compound 8-bit word string data DZBG
First composite 10-bit word string data D based on (8)
A ZBG (10) is formed. At this time, the 8-bit word synchronization data DEK (8) is converted into K28.5, and any 8-bit word data DEX8 is converted to 10-bit word data DXX. Converted to X.

Composite 8-bit word string data DZBG
Additional word data group DWS inserted in (8)
Is as shown in FIG. 11A, the composite 10-bit word string data DZBG (10) is
B, and RD is defined as positive (+) in a portion based on the additional word data group DWS.
5 is included. When the additional word data group DWS inserted into the composite 8-bit word string data DZBG (8) is as shown in FIG. 12A, the composite 10-bit word string data DZBG (1
0) is as shown in FIG. 12B, and the RD based on the second 8-bit word synchronization data DEK8 in the additional word data group DWS is positive (+) in the portion based on the additional word data group DWS. Do + K2
8.5 shall be included.

The composite 10-bit word string data DZBG (10) formed in the 8B / 10B converter 50 is
Sent from the 10-bit word string data forming unit 41,
It is supplied to the P / S converter 51. In the P / S converter 51, the composite 10-bit word string data DZBG (1
0), P for converting parallel data into serial data
/ S conversion to obtain composite 10-bit word string data DZ
The serial data DSBG based on the BG (10) is formed, and the serial data DSBG is transmitted to the transmission signal forming unit 52.
To supply. The transmission signal forming unit 52 transmits the serial data DSBG based on the serial data DSBG based on the serial data DSBG so as to transmit the data DSBG through, for example, a data transmission path formed using an optical fiber.
An optical signal SLBG suitable for a data transmission path formed using fibers is formed and transmitted. Thereby,
Transmission of serial data DSBG is performed.

Further, blue primary color signal information data DBV and green primary color signal information data D
The red primary color signal information data DRV of the GV and red primary color signal information data DRV is supplied to the 8-bit word string data forming unit 53 as second digital image information data. The red primary color signal information data DRV is also 10-bit quantized digital data having a word transmission rate of, for example, 13.5 MBps.

The 8-bit word string data forming unit 53 includes:
The horizontal synchronizing signal SH related to the red primary color signal information data DRV is also supplied, and the 8-bit word string data forming unit 53 transmits the red primary color signal information data DRV by word transmission based on the horizontal synchronizing signal SH as a reference timing. A second speed of, for example, 16.875 MBps
Is converted to 8-bit word string data DR (8). The 8-bit word string data DR (8) obtained in the 8-bit word string data forming unit 53 is supplied to the 10-bit word string data forming unit.

In the 10-bit word string data forming section 54, the 8-bit word string data DR (8) is supplied to the speed conversion / synchronous data insertion section 55. The speed conversion / synchronization data insertion unit 55 includes a word data transmission unit 56.
Supplies an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 55
In, the 8-bit word string data DR (8) having a word transmission rate of 16.875 MBps is subjected to speed conversion for converting the word transmission rate from, for example, 16.875 MBps to 26.5625 MBps, The additional word data group DWS including the 8-bit word synchronization data from the word data transmission unit 56 is inserted at a word interval of, so that the word transmission rate based on the red primary color signal information data DRV is 2
Form composite 8-bit word string data DZR (8) of 6.5625 MBps.

FIG. 13 shows the speed conversion / synchronous data insertion unit 5
5 shows a specific configuration example. In the example shown in FIG. 13, 8-bit word string data DR (8) based on the red primary color signal information data DRV is supplied to the switch 57. The switch 57 operates according to the control signal CSA.
The switching is performed every predetermined period, for example, every 1 ms, whereby the 8-bit word string data DR (8)
The data is alternately supplied to the memory unit 58 and the memory unit 59 every s to distribute the 8-bit word string data DR (8) to the memory unit 58 and the memory unit 59.

A memory control signal forming unit 60 is provided in association with the memory unit 58 and the memory unit 59.
The clock signal CA whose frequency is 13.5 MHz and the clock signal CB whose frequency is 26.5625 MHz, which are synchronized with the word clock signal in the red primary color signal information data DRV, are supplied to the memory control signal forming unit 60. . Then, the memory control signal forming unit 60 sets the frequency to 16.875 MHz based on the clock signal CA.
A write control signal QW having a frequency of 26.5625 MHz is generated based on the clock signal CB, and the write control signal QW and the read control signal QR are stored in the memory unit 58 and It is supplied to both of the memory unit 59.

Thus, in memory section 58, 8-bit word string data DR (8)
Is supplied, the 8-bit word string data D
R (8) increases the word transmission rate to 16.875M in response to the write control signal QW having a frequency of 16.875 MHz.
It is written in the state of Bps. Also, the memory unit 59
Also, in the period in which the 8-bit word string data DR (8) is supplied through the switch 57, the 8-bit word string data DR (8) has a frequency of 16.875 MHz.
Writing is performed in a state where the word transmission rate is set to 16.875 MBps according to the write control signal QW set to z. Accordingly, the word transmission speed of the 8-bit word string data DR (8) in the memory units 58 and 59 is set to 16.87.
Writing in the state of 5 MBps is performed by the switch 57
It is performed alternately for 1 ms in accordance with the switching every ms.

The 8-bit word string data DR (8) written into the memory unit 58 for 1 ms is the next 1-bit word data DR (8).
Within a period of ms, the word transmission rate is set to 26.5 according to the read control signal QR whose frequency is set to 26.5625 MHz.
8-bit word string data DR '(8) with 625 MBps
Is read from the memory unit 58 and supplied to the switch 61. The 8-bit word string data DR (8) written in the memory unit 59 for 1 ms also has a frequency of 26.5625 MHz during the next 1 ms according to the read control signal QR. Word transmission speed 2
8-bit word string data D of 6,62525 MBps
R ′ (8) is read from the memory unit 59 and the switch 6
1 is supplied. The switch 61 is also supplied with the additional word data group DWS from the word data transmission unit 56. The additional word data group DWS has a word transmission rate of 26.5625 MBps.

The switch 61 controls the word transmission rate from the word data transmitting section 56 to 2 in response to the control signal CSB.
An additional word data group DWS with 6.5625 MBps, 8-bit word string data DR '(8) with a word transmission rate of 26.5625 MBps read from the memory unit 59, and a word read from the memory unit 58 Each of the 8-bit word string data DR '(8) having a transmission rate of 26.5625 MBps is sequentially extracted for a predetermined word period. As a result, the switch 61 adds, to the 8-bit word string data DR ′ (8) whose word transmission rate has been converted to 26.5625 MBps, an additional word data group having a word transmission rate of 26.5625 MBps at a predetermined word interval. Composite 8-bit word string data DZR (8) formed by inserting DWS is derived.

The additional word data group DWS having a word transmission rate of 26.5625 MBps from the word data transmission unit 56 is composed of a plurality of 8-bit data words including 8-bit word synchronization data. The 8-bit word synchronization data DEK8 is followed by the arbitrary 8-bit word synchronization data DEK8, and the 8-bit word synchronization data DEK8 is followed by the arbitrary 8-bit word synchronization data DEX8. Bit word data DEX
8 is set to be 10-bit word data DXX.X with RD being negative (-) when 8B / 10B converted.

Such an additional word data group DW
The composite 8-bit word string data DZR (8) formed by inserting the S is added to the additional word data group DWS.
Is inserted as shown in FIG. 14A. DR8 corresponds to the memory units 58 and 59 shown in FIG.
8 bit word string data DR ′ read from each of
(8) represents each 8-bit word data, and is converted into 10-bit word data DR10 by 8B / 10B conversion.

The additional word data group DWS having a word transmission rate of 26.5625 MBps from the word data transmitting section 56 has, for example, a predetermined number of arbitrary 8-bit word data DEX8 added to the first 8-bit word synchronization data DEK8. Subsequently, the second 8-bit word synchronization data DEK is added to the arbitrary 8-bit word data DEX8.
8, the second 8-bit word synchronization data DEK8 is followed by an arbitrary 8-bit word synchronization data DEX8, and the second 8-bit word synchronization data DEK8
The 8-bit word data DEX8 immediately before 8 is 8B / 1
It is set to be 10-bit word data DXX.X with RD being negative (-) when converted to 0B.

Such an additional word data group DW
The composite 8-bit word string data DZR (8) formed by inserting the S is added to the additional word data group DWS.
Is inserted as shown in FIG. 15A.

As described above, the composite 8-bit word string data DZR (8) formed in the speed conversion / synchronization data insertion unit 55 is supplied to the 8B / 10B conversion unit 62. The 8B / 10B conversion unit 62 performs an 8B / 10B conversion for converting the 8-bit word data to the 10-bit word data on the composite 8-bit word string data DZR (8), thereby obtaining the composite 8-bit word string data DZR (8). 8) based on the second composite 10-bit word string data DZR (1
0) is formed. At this time, the 8-bit word synchronization data D
EK (8) is converted to K28.5 and any 8
The bit word data DEX8 is 10 bit word data DXX. Converted to X.

Composite 8-bit word string data DZR (8)
The additional word data group DWS inserted in FIG.
4A, the composite 10-bit word string data DZR (10) is set as shown in FIG. 14B, and the RD is positive (+ )) And + K28.5. Also, composite 8-bit word string data D
Additional word data group DW inserted in ZR (8)
When S is as shown in FIG. 15A, the composite 10-bit word string data DZR (10) is
B, and a portion based on the additional word data group DWS includes an additional word data group DW.
Second 8-bit word synchronization data DEK8 in S
, And + K28.5 which makes RD positive (+).

The composite 10-bit word string data DZR (10) formed in the 8B / 10B conversion section 62
Sent from the 0-bit word string data forming unit 54,
/ S conversion section 63. In the P / S converter 63, the composite 10-bit word string data DZR (10)
P / S that converts parallel data into serial data
After conversion, the composite 10-bit word string data DZR
The serial data DSR based on (10) is formed, and the serial data DSR is supplied to the transmission signal forming unit 64. In the transmission signal forming unit 64, the serial data D
For transmitting the SR through, for example, a data transmission line formed using an optical fiber, an optical signal SL based on the serial data DSR and suitable for a data transmission line formed using an optical fiber.
Form R and send. Thereby, transmission of the serial data DSR is performed.

FIG. 16 shows an example of a data transmission apparatus in which an example of the data transmission method according to any one of claims 11 to 16 in the claims of the present application is implemented.

In the example shown in FIG. 16, the Y data series and the P _B / P _R data shown in FIGS. 34A and 34B respectively represent the luminance signal information data and the color difference signal information data forming the digital video signal. Y, like a series
Data series DYV and P _B / P _R data sequence DCV is,
The data is supplied to the bit division unit 70. Each of the Y data sequence DYV and P _B / P _R data sequence DCV is a word transmission rate, for example, a 10-bit quantized digital data to 74.25 MBps.

[0105] In the bit dividing portion 70 to each word in the Y data sequence DYV and P _B / P _R data sequence DCV, subjected to a bit dividing processing to divide 8 bits, into three 8-bit and 4-bit, whereby, 8-bit word string data DA (8), 8-bit word string data DB
(8) and 4-bit word string data DC (4) are formed. Each of the 8-bit word string data DA (8), the 8-bit word string data DB (8) and the 4-bit word string data DC (4) has a word transmission rate of 74.25.
MBps.

Then, the 8-bit word string data DA (8) obtained in the bit dividing section 70 is supplied to the 10-bit word string data forming section 71. In the 10-bit word string data forming section 71, the 8-bit word string data DA (8) is supplied to the speed conversion / synchronization data insertion section 72. The speed conversion / synchronization data insertion unit 72 is supplied from the word data transmission unit 73 with an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 72
, The word transmission speed of the 8-bit word string data DA (8) having a word transmission speed of 74.25 MBps is, for example, from 74.25 MBps to 10
While performing speed conversion to convert to 6.25 MBps,
At a predetermined word interval, an additional word data group DWS including the 8-bit word synchronization data from the word data transmission unit 73 is inserted, and thereby the word transmission rate based on the 8-bit word string data DA (8) is obtained. 10
Composite 8-bit word string data D at 6.25 MBps
A ZA (8) is formed.

The specific configuration example of the speed conversion / synchronous data insertion unit 72 is the same as the specific configuration example of the speed conversion / synchronization data insertion unit 12 shown in FIG. 2, for example. The additional word data group DWS from the word data transmission unit 73 has a word transmission rate of 106.2.
5 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZA (8) formed in the speed conversion / synchronization data insertion section 72 is supplied to the 8B / 10B conversion section 74. The 8B / 10B conversion unit 74 performs an 8B / 10B conversion for converting the 8-bit word data into the 10-bit word data on the composite 8-bit word string data DZA (8), thereby obtaining the composite 8-bit word string data DZA (8). Form composite 10-bit word string data DZA (10) based on 8). At this time, the 8-bit word synchronization data DEK
(8) is converted to K28.5.

The composite 10-bit word string data DZA (10) formed in the 8B / 10B conversion section 74 is
The data transmitted from the 0-bit word string data forming unit 71
/ S conversion section 75. In the P / S converter 75, the composite 10-bit word string data DZA (10)
P / S that converts parallel data into serial data
After conversion, the composite 10-bit word string data DZA
The serial data DSA based on (10) is formed, and the serial data DSA is supplied to the transmission signal forming unit 76. In the transmission signal forming section 76, the serial data D
In order to transmit the SA through, for example, a data transmission line formed by using an optical fiber, an optical signal SL based on the serial data DSA and suitable for a data transmission line formed by using an optical fiber.
Form A and send it out. Thereby, the serial data D
The transmission of the SA is performed.

The 8-bit word string data DB (8) obtained in the bit dividing section 70 is supplied to a 10-bit word string data forming section 77. In the 10-bit word string data forming unit 77, the 8-bit word string data DB (8) is supplied to the speed conversion / synchronization data insertion unit 78. In addition, the speed conversion / synchronous data insertion unit 78 includes:
An additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data is supplied from the word data transmission unit 79.

The speed conversion / synchronous data insertion unit 78
In the case of the 8-bit word string data DB (8) having a word transmission rate of 74.25 MBps, the word transmission rate is changed from 74.25 MBps to 10
While performing speed conversion to convert to 6.25 MBps,
At a predetermined word interval, an additional word data group DWS including the 8-bit word synchronization data from the word data sending unit 79 is inserted, and thereby, the word transmission rate based on the 8-bit word string data DB (8) is obtained. 10
Composite 8-bit word string data D at 6.25 MBps
ZB (8) is formed.

The specific configuration example of the speed conversion / synchronization data insertion unit 78 is the same as the specific configuration example of the speed conversion / synchronization data insertion unit 12 shown in FIG. 2, for example. The additional word data group DWS from the word data sending unit 79 has a word transmission rate of 106.2.
5 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZB (8) formed in the speed conversion / synchronization data insertion section 78 is supplied to the 8B / 10B conversion section 80. The 8B / 10B conversion unit 80 performs an 8B / 10B conversion for converting the 8-bit word data into the 10-bit word data on the composite 8-bit word string data DZB (8), thereby obtaining the composite 8-bit word string data DZB ( Form composite 10-bit word string data DZB (10) based on 8). At this time, the 8-bit word synchronization data DEK
(8) is converted to K28.5.

The composite 10-bit word string data DZB (10) formed in the 8B / 10B conversion section 80 is 1
The P bit transmitted from the 0-bit word string data forming unit 77
/ S conversion section 81. In the P / S converter 81, the composite 10-bit word string data DZB (10)
P / S that converts parallel data into serial data
After conversion, composite 10-bit word string data DZB
The serial data DSB based on (10) is formed, and the serial data DSB is supplied to the transmission signal forming unit 82. In the transmission signal forming section 82, the serial data D
To transmit the SB through, for example, a data transmission line formed using optical fiber, an optical signal SL based on the serial data DSB and suitable for the data transmission line formed using optical fiber.
Form B and send it out. Thereby, the serial data D
Transmission of SB is performed.

Further, 4-bit word string data DC (4) obtained in bit division section 70 is supplied to bit addition section 83. The bit addition unit 83 is also supplied with predetermined 4-bit word string additional data DD (4) having a word transmission rate of 74.25 MBps. Then, in the bit adding section 83, the 4-bit word string additional data DD (4) is added to the 4-bit word string data DC (4) from the bit dividing section 70, and the word transmission speed is set to 74.
8-bit word string data DD (8) at 25 MBps
Is formed.

The 8-bit word string data DD (8) formed in the bit adding section 83 is supplied to a 10-bit word string data forming section 84. In the 10-bit word string data forming section 84, the 8-bit word string data D
D (8) is supplied to the speed conversion / synchronization data insertion unit 85. The speed conversion / synchronization data insertion unit 85 is supplied from the word data transmission unit 86 with an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 85
, The word transmission speed of the 8-bit word string data DD (8) having a word transmission speed of 74.25 MBps is, for example, from 74.25 MBps to 10
While performing speed conversion to convert to 6.25 MBps,
At a predetermined word interval, an additional word data group DWS including the 8-bit word synchronization data from the word data transmission unit 86 is inserted, and thereby, the word transmission rate based on the 8-bit word string data DD (8) is obtained. 10
Composite 8-bit word string data D at 6.25 MBps
Form ZD (8).

The speed conversion / synchronous data insertion unit 85 also has a specific configuration example similar to that of the speed conversion / synchronization data insertion unit 12 shown in FIG. 2, for example. The additional word data group DWS from the word data sending unit 86 has a word transmission rate of 106.2.
5 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZD (8) formed in the speed conversion / synchronization data insertion section 85 is supplied to the 8B / 10B conversion section 87. The 8B / 10B conversion section 87 performs an 8B / 10B conversion for converting the 8-bit word data to the 10-bit word data on the composite 8-bit word string data DZD (8), thereby obtaining the composite 8-bit word string data DZD ( Form composite 10-bit word string data DZD (10) based on 8). At this time, the 8-bit word synchronization data DEK
(8) is converted to K28.5.

Composite 10-bit word string data DZD (10) formed in 8B / 10B conversion section 87 is 1
Sent from the 0-bit word string data forming unit 84,
/ S conversion section 88. In the P / S converter 88, the composite 10-bit word string data DZD (10)
P / S that converts parallel data into serial data
After conversion, composite 10-bit word string data DZD
The serial data DSD based on (10) is formed, and the serial data DSD is supplied to the transmission signal forming unit 89. In transmission signal forming section 89, serial data D
An optical signal SL suitable for a data transmission line formed using an optical fiber based on serial data DSD in order to transmit SD through a data transmission line formed using an optical fiber, for example.
Form D and send. Thereby, the serial data D
Transmission of SD is performed.

FIGS. 17 and 18 show a data transmission apparatus in which another example of the data transmission method according to any one of claims 11 to 16 in the claims of the present application is implemented. Here is an example.

In the examples shown in FIGS. 17 and 18, the luminance signal information data and the color difference signal information data forming the first digital video signal are respectively shown in FIG.
Of as the Y data sequence and P _B / P _R data sequence shown in A and B of, Y data sequence DYA and P _B / P _R data sequence DCA it is supplied to the bit dividing portion 90. Y
Each data series DYA and P _B / P _R data sequence DCA is a word transmission rate, for example, 74.25 MBps
10-bit quantized digital data.

In the bit division section 90, each word in the Y data series DYA and the P _B / P _R data series DCA is subjected to a bit division process of dividing the words into 8 bits, 8 bits, and 4 bits. 8-bit word string data DA (8), 8-bit word string data DB
(8) and 4-bit word string data DC (4) are formed. Each of the 8-bit word string data DA (8), the 8-bit word string data DB (8) and the 4-bit word string data DC (4) has a word transmission rate of 74.25.
MBps.

Then, the 8-bit word string data DA (8) obtained in the bit dividing section 90 is supplied to a 10-bit word string data forming section 91. In the 10-bit word string data forming section 91, the 8-bit word string data DA (8) is supplied to the speed conversion / synchronization data insertion section 92. The speed conversion / synchronization data insertion unit 92 is supplied from the word data transmission unit 93 with an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 92
, The word transmission speed of the 8-bit word string data DA (8) having a word transmission speed of 74.25 MBps is, for example, from 74.25 MBps to 10
While performing speed conversion to convert to 6.25 MBps,
At a predetermined word interval, an additional word data group DWS including 8-bit word synchronizing data from the word data transmitting unit 93 is inserted, and thereby, a word transmission rate based on the 8-bit word string data DA (8) is obtained. 10
Composite 8-bit word string data D at 6.25 MBps
A ZA (8) is formed.

The specific example of the configuration of the speed conversion / synchronous data insertion unit 92 is the same as the specific example of the configuration of the speed conversion / synchronization data insertion unit 12 shown in FIG. 2, for example. The additional word data group DWS from the word data transmission unit 93 has a word transmission rate of 106.2.
5 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZA (8) formed in the speed conversion / synchronization data insertion section 92 is supplied to the 8B / 10B conversion section 94. The 8B / 10B conversion unit 94 performs an 8B / 10B conversion for converting the 8-bit word data into the 10-bit word data on the composite 8-bit word string data DZA (8) to obtain the composite 8-bit word string data DZA (8). Form composite 10-bit word string data DZA (10) based on 8). At this time, the 8-bit word synchronization data DEK
(8) is converted to K28.5.

The composite 10-bit word string data DZA (10) formed in the 8B / 10B conversion section 94 is
Sent from the 0-bit word string data forming unit 91,
/ S conversion section 95. In the P / S converter 95, the composite 10-bit word string data DZA (10)
P / S that converts parallel data into serial data
After conversion, the composite 10-bit word string data DZA
The serial data DSA based on (10) is formed, and the serial data DSA is supplied to the transmission signal forming section 96. In transmission signal forming section 96, serial data D
In order to transmit the SA through, for example, a data transmission line formed by using an optical fiber, an optical signal SL based on the serial data DSA and suitable for a data transmission line formed by using an optical fiber.
Form A and send it out. Thereby, the serial data D
The transmission of the SA is performed.

Further, the 8-bit word string data DB (8) obtained in the bit division section 90 is supplied to a 10-bit word string data forming section 97. In the 10-bit word string data forming section 97, the 8-bit word string data DB (8) is supplied to the speed conversion / synchronization data inserting section 98. In addition, the speed conversion / synchronous data insertion unit 98 includes:
An additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data is supplied from the word data transmission unit 99.

The speed conversion / synchronous data insertion section 98
In the case of the 8-bit word string data DB (8) having a word transmission rate of 74.25 MBps, the word transmission rate is changed from 74.25 MBps to 10
While performing speed conversion to convert to 6.25 MBps,
At a predetermined word interval, an additional word data group DWS including the 8-bit word synchronization data from the word data sending unit 99 is inserted, and thereby, the word transmission rate based on the 8-bit word string data DB (8) 10
Composite 8-bit word string data D at 6.25 MBps
ZB (8) is formed.

The speed conversion / synchronous data insertion unit 98 has a specific configuration example similar to the specific configuration example of the speed conversion / synchronization data insertion unit 12 shown in FIG. 2, for example. The additional word data group DWS from the word data sending unit 99 has a word transmission rate of 106.2.
5 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZB (8) formed in the speed conversion / synchronization data insertion section 98 is supplied to the 8B / 10B conversion section 100. In the 8B / 10B converter 100, the composite 8
8B / 10 for converting 8-bit word data into 10-bit word data in bit word string data DZB (8)
B-converted, and compound 8-bit word string data DZB
Compound 10-bit word string data DZB based on (8)
Form (10). At that time, the 8-bit word synchronization data DEK (8) is converted into K28.5.

Composite 10-bit word string data DZB (10) formed in 8B / 10B conversion section 100 is
Sent from the 10-bit word string data forming unit 97,
It is supplied to the P / S converter 101. P / S converter 101
, The composite 10-bit word string data DZB (1
0), P for converting parallel data into serial data
/ S conversion to obtain composite 10-bit word string data DZ
The serial data DSB based on B (10) is formed, and the serial data DSB is supplied to the transmission signal forming unit 102. In the transmission signal forming unit 102, in order to transmit the serial data DSB through, for example, a data transmission path formed using optical fiber, data formed using optical fiber based on serial data DSB is used. An optical signal SLB suitable for a transmission path is formed and transmitted. Thereby, transmission of the serial data DSB is performed.

Further, 4-bit word string data DC (4) obtained in bit division section 90 is supplied to bit addition section 103.

A Y data sequence and a P _B / P _R data sequence shown in FIGS. 34A and 34B respectively representing the luminance signal information data and the chrominance signal information data forming the second digital video signal. , Y data sequence DYB and P _B / P _R data sequence DCB is, the bit dividing portion 110
Supplied to Y data sequence DYB and P _B / P _R data sequence DCB each well, the word transmission rate, for example, 7
This is 10-bit quantized digital data of 4.25 MBps. Then, a synchronization signal SYC common to the bit division unit 90 is supplied to the bit division unit 110,
The bit division unit 90 and the bit division unit 110 are in a synchronous relationship.

[0137] In the bit dividing portion 110, each word in the Y data sequence DYB and P _B / P _R data sequence DCB, 4 bits performs bit dividing process of dividing into three 8-bit and 8-bit, whereby, 4-bit word string data DD (4), 8-bit word string data DE
(8) and 8-bit word string data DF (8) are formed. Each of the 4-bit word string data DD (4), the 8-bit word string data DE (8) and the 8-bit word string data DF (8) has a word transmission rate of 74.25.
MBps.

The 8-bit word string data DE (8) obtained in the bit dividing section 110 is supplied to a 10-bit word string data forming section 117. In the 10-bit word string data forming section 117, the 8-bit word string data DE (8) is converted into the speed conversion / synchronous data inserting section 1
18. Further, the speed conversion / synchronization data insertion unit 118 is supplied from the word data transmission unit 119 with an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 11
8, the word transmission rate of the 8-bit word string data DE (8) having a word transmission rate of 74.25 MBps is, for example, from 74.25 MBps to 1
In addition to performing the speed conversion for converting the data to a data rate of 0.625 MBps, the word data transmitting unit 1 is provided at a predetermined word interval.
A compound 8-bit word string data having a word transmission rate of 106.25 MBps based on the 8-bit word string data DE (8) is inserted based on the additional word data group DWS including the 8-bit word synchronization data from No. 19. DZE (8) is formed.

The speed conversion / synchronous data insertion unit 118 also has a specific configuration example, for example, as shown in FIG.
This is the same as the specific configuration example of the synchronous data insertion unit 12. The additional word data group DWS from the word data transmission unit 119 has a word transmission rate of 106.
25 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZE (8) formed in the speed conversion / synchronization data insertion section 118 is supplied to the 8B / 10B conversion section 120. The 8B / 10B converter 120 converts 8 bit word data into 10 bit word data into composite 8 bit word string data DZE (8).
0B conversion is performed, and the composite 8-bit word string data DZE
Compound 10-bit word string data DZE based on (8)
Form (10). At that time, the 8-bit word synchronization data DEK (8) is converted into K28.5.

Compound 10-bit word string data DZE (10) formed in 8B / 10B conversion section 120 is
The data is sent from the 10-bit word string data forming unit 117 and supplied to the P / S conversion unit 121. P / S converter 1
21, the composite 10-bit word string data DZE
(10) is subjected to P / S conversion for converting parallel data into serial data to form serial data DSE based on the composite 10-bit word string data DZE (10), and the serial data DSE is transmitted to the transmission signal forming unit 122.
To supply. In the transmission signal forming unit 122, in order to transmit the serial data DSE through a data transmission path formed by using an optical fiber, for example, the data formed by using the optical fiber based on the serial data DSE is used. An optical signal SLE suitable for a transmission path is formed and transmitted. Thereby, transmission of the serial data DSE is performed.

The 8-bit word string data DF (8) obtained in the bit dividing section 110 is supplied to a 10-bit word string data forming section 123. In the 10-bit word string data forming unit 123, the 8-bit word string data DF (8) is converted into the speed conversion / synchronous data inserting unit 12
4 is supplied. Also, a speed conversion / synchronous data insertion unit 1
24, an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data is supplied from the word data transmission unit 125.

The speed conversion / synchronous data insertion unit 12
4, the word transmission rate of the 8-bit word string data DF (8) having a word transmission rate of 74.25 MBps is, for example, from 74.25 MBps to 1
In addition to performing the speed conversion for converting the data to a data rate of 0.625 MBps, the word data transmitting unit 1 is provided at a predetermined word interval.
25, an additional word data group DWS including 8-bit word synchronization data from 25 is inserted, whereby composite 8-bit word string data having a word transmission rate of 106.25 MBps based on 8-bit word string data DF (8) Form DZF (8).

The speed conversion / synchronous data insertion unit 124 also has a specific configuration example, for example, as shown in FIG.
This is the same as the specific configuration example of the synchronous data insertion unit 12. The additional word data group DWS from the word data transmission unit 125 has a word transmission rate of 106.
25 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZF (8) formed in the speed conversion / synchronization data insertion section 124 is supplied to the 8B / 10B conversion section 126. The 8B / 10B converter 126 converts the 8-bit word data into 10-bit word data into the composite 8-bit word string data DZF (8).
0B conversion is applied to the composite 8-bit word string data DZF.
Compound 10-bit word string data DZF based on (8)
Form (10). At that time, the 8-bit word synchronization data DEK (8) is converted into K28.5.

The composite 10-bit word string data DZF (10) formed in the 8B / 10B conversion section 126 is
The data is sent from the 10-bit word string data forming unit 123 and supplied to the P / S converter 127. P / S converter 1
27, the composite 10-bit word string data DZF
(10) is subjected to P / S conversion for converting parallel data into serial data to form serial data DSF based on composite 10-bit word string data DZF (10), and the serial data DSF is transmitted to transmission signal forming section 128.
To supply. In the transmission signal forming unit 128, in order to transmit the serial data DSF through, for example, a data transmission path formed using an optical fiber, the data formed using an optical fiber based on the serial data DSF is used. An optical signal SLF suitable for a transmission path is formed and transmitted. Thereby, transmission of the serial data DSF is performed.

Further, 4-bit word string data DD (4) obtained in bit division section 110 is supplied to bit addition section 103. In bit adding section 103, 4-bit word string data D
The 4-bit word string data DD (4) from the bit division unit 110 is added to C (4) to reduce the word transmission rate to 7 (C).
8-bit word string data DG at 4.25 MBps
(8) is formed.

8 formed in the bit adding section 103
The bit word string data DG (8) is supplied to the 10-bit word string data forming unit 111. In the 10-bit word string data forming unit 111, the 8-bit word string data DG (8) is supplied to the speed conversion / synchronization data insertion unit 112. The speed conversion / synchronous data insertion unit 112
Is supplied from the word data sending unit 113 to an additional word data group DWS composed of a plurality of 8-bit data words including 8-bit word synchronization data.

The speed conversion / synchronous data insertion unit 11
2, the word transmission rate of the 8-bit word string data DG (8) having a word transmission rate of 74.25 MBps is, for example, from 74.25 MBps to 1
In addition to performing the speed conversion for converting the data to a data rate of 0.625 MBps, the word data transmitting unit 1 is provided at a predetermined word interval.
13 inserts the additional word data group DWS including the 8-bit word synchronization data from the X.13, and thereby, based on the 8-bit word string data DG (8), the composite 8-bit word string data having a word transmission rate of 106.25 MBps DZG (8) is formed.

The speed conversion / synchronous data insertion unit 112 also has a specific configuration example, for example, as shown in FIG.
This is the same as the specific configuration example of the synchronous data insertion unit 12. The additional word data group DWS from the word data transmission unit 113 has a word transmission speed of 106.
25 MBps and includes at least one 8-bit word synchronization data DEK8.

As described above, the composite 8-bit word string data DZG (8) formed in the speed conversion / synchronization data insertion section 112 is supplied to the 8B / 10B conversion section 114. The 8B / 10B conversion unit 114 converts the 8-bit word data into 10-bit word data into the composite 8-bit word string data DZG (8).
0B conversion is applied to the composite 8-bit word string data DZG.
Compound 10-bit word string data DZG based on (8)
Form (10). At that time, the 8-bit word synchronization data DEK (8) is converted into K28.5.

Compound 10-bit word string data DZG (10) formed in 8B / 10B conversion section 114 is
The data is sent from the 10-bit word string data forming unit 111 and supplied to the P / S conversion unit 115. P / S converter 1
15, the composite 10-bit word string data DZG
(10) is subjected to P / S conversion for converting parallel data into serial data to form serial data DSG based on composite 10-bit word string data DZG (10), and the serial data DSG is transmitted to transmission signal forming section 116.
To supply. In the transmission signal forming unit 116, in order to transmit the serial data DSG through a data transmission path formed by using an optical fiber, for example, data formed by using an optical fiber based on the serial data DSG is used. An optical signal SLG suitable for the transmission path is formed and transmitted. Thereby, transmission of the serial data DSG is performed.

FIG. 19 shows a multiplexing unit in the data transmission apparatus shown in FIG. 1 according to an example of the data transmission method according to any one of the first to tenth aspects of the present invention. 1 shows an example of a data receiving apparatus that receives a multiplexed optical signal SLT transmitted from the H.23.

In the example of the data receiving apparatus shown in FIG. 19, for example, a signal separating unit 104 for receiving a multiplexed optical signal SLT transmitted through a data transmission line formed using an optical fiber is used. Provided. When receiving the multiplexed optical signal SLT, the signal separating unit 104 separates the optical signal SLY and the optical signal SLC from the received multiplexed optical signal SLT.

The optical signal SLY separated by the signal separation unit 104 is supplied to the demodulation unit 105. Demodulation unit 105
In, the optical signal SLY is demodulated to reproduce serial data DSY based on the optical signal SLY, and the reproduced serial data DSY is serial / parallel (S /
P) It is supplied to the conversion / word synchronization data detection unit 106.

S / P conversion / word synchronous data detecting section 10
In step 6, the serial data DSY is subjected to serial / parallel conversion, and the word transmission rate is set to, for example, 106.25 Mbps as shown in FIG. 20A, FIG. 20C, FIG. 21A or FIG. First composite 10-bit word string data DZY which is parallel data
Form (10). Then, the composite 10-bit word sequence data DZY (10) obtained from the S / P conversion / word synchronization data detection unit 106 is supplied to the 8-bit word sequence data formation unit 107.

Further, in S / P conversion / word synchronous data detecting section 106, additional word data group DW in composite 10-bit word string data DZY (10) is output.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
When the composite 10-bit word string data DZY (10) is as shown in FIG. 20A, the word synchronous data detection output signal SWS is + K28. If the composite 10-bit word string data DZY (10) is obtained as shown in FIG. 20B and is as shown in FIG. Corresponding to + K28.5 in the column data DZY (10), it is obtained as shown in FIG.
When the bit word string data DZY (10) is as shown in FIG. 21A, corresponding to + K28.5 in the composite 10-bit word string data DZY (10), FIG. When the composite 10-bit word sequence data DZY (10) is obtained as shown in FIG. 21C and the composite 10-bit word sequence data DZY (10) is as shown in FIG.
It is obtained as shown in FIG. 21D, corresponding to K28.5.

S / P conversion / word synchronous data detection unit 10
6 is a word synchronous data detection output signal SWS obtained from
Is supplied to the synchronization signal forming unit 108. In synchronization signal forming section 108, word synchronization data detection output signal S
A word synchronization signal CWY based on WS is formed.

S / P conversion / word synchronous data detection unit 10
6 compound 10-bit word string data DZY (10)
The word synchronizing signal CWY from the synchronizing signal forming unit
Is also supplied. Then, in the 8-bit word string data forming unit 107, the composite 10-bit word string data DZ
Y (10) and the word synchronization signal CWY are supplied to the 10B / 8B conversion unit 109, and the 10B / 8B conversion unit 109 performs 10B / 8B conversion on the composite 10-bit word string data DZY (10) by the word synchronization signal CWY. Is performed under the control of synchronization by the
Bit word string data DZY (8) is formed.

At this time, the 10-bit word data DY included in the composite 10-bit word string data DZY (10)
10 is converted to 8-bit word data DY8. Also, ± DXX · X, ± 10-bit word data included in a portion based on the additional word data group DWS in the composite 10-bit word string data DZY (10)
K28.5 and D21.3 are converted into 8-bit word data DEX8, 8-bit word synchronization data DEK8, and 8-bit auxiliary word data DEA8, respectively. As a result, the composite 8-bit word string data DZY (8) obtained by the 10B / 8B conversion unit 109 corresponds to the composite 8-bit word string data DZY (8) shown in FIG. 4A or FIG. It shall be.

The composite 8-bit word string data DZY (8) from the 10B / 8B converter 109 is supplied to the speed converter / synchronous data separator 129. The word conversion signal CWY from the synchronization signal forming unit 108 is also supplied to the speed conversion / synchronization data separation unit 129. Then, in the speed conversion / synchronization data separation unit 129, the word synchronization signal CWY
, And the word transmission rate is set to 106. based on the composite 8-bit word string data DZY (8).
First 8-bit word string data DX to be 25 MBps
Y (8), 8-bit word data DEX8, 8-bit word synchronization data DEK8, and 8-bit auxiliary word data DEA8 forming the additional word data group DWS.
Are separated and taken out, and the taken out 8
The bit word string data DXY (8) is subjected to speed conversion from a word transmission speed of 106.25 MBps to a word transmission speed of 92.8125 MBps.

The 8-bit word string data DXY (8) having a word transmission rate of 92.8125 MBps obtained in the rate conversion / synchronous data separation section 129 is sent from the 8-bit word string data forming section 107 and is converted into a 10-bit word. The data is supplied to the column data forming unit 130.

The optical signal SLC separated by the signal separation unit 104 is supplied to a demodulation unit 131. The demodulation unit 131 performs demodulation processing on the optical signal SLC,
Regenerate serial data DSC based on optical signal SLC,
The reproduced serial data DSC is supplied to the S / P conversion / word synchronous data detection unit 132.

S / P conversion / word synchronous data detecting section 13
2, serial / parallel conversion is performed on the serial data DSC to change the word transmission rate to, for example, 106.25 Mbps as shown in FIG. 22A, FIG. 22C, FIG. 23A or FIG. Second composite 10-bit word string data DZC which is parallel data
(10) is formed. Then, the composite 10-bit word string data DZC (10) obtained from the S / P conversion / word synchronization data detecting section 132 is supplied to the 8-bit word string data forming section 133.

Further, in S / P conversion / word synchronous data detecting section 132, additional word data group DW in composite 10-bit word string data DZC (10) is output.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
When the composite 10-bit word string data DZC (10) is as shown in FIG. 22A, the word synchronous data detection output signal SWS is + K28. In the case where the composite 10-bit word string data DZC (10) is obtained as shown in FIG. 22B and is as shown in FIG. Corresponding to + K28.5 in the column data DZC (10), it is obtained as shown in FIG.
When the bit word string data DZC (10) is as shown in FIG. 23A, corresponding to + K28.5 in the composite 10-bit word string data DZC (10), FIG. When the composite 10-bit word sequence data DZC (10) is obtained as shown in FIG. 23C and the composite 10-bit word sequence data DZC (10) is obtained as shown in FIG.
It is obtained as shown in FIG. 23D, corresponding to K28.5.

S / P conversion / word synchronous data detecting section 13
2 is a word synchronous data detection output signal SWS obtained from
Is supplied to the synchronization signal forming unit 134. In synchronization signal forming section 134, word synchronization data detection output signal S
A word synchronization signal CWC based on WS is formed.

S / P conversion / word synchronous data detecting section 13
2 composite 10-bit word string data DZC (10)
Is supplied to the 8-bit word string data forming unit 133, the word synchronizing signal CWC from the synchronizing signal forming unit 134 is supplied.
Is also supplied. In the 8-bit word string data forming unit 133, the composite 10-bit word string data DZ
C (10) and the word synchronization signal CWC are supplied to the 10B / 8B conversion unit 135, and the 10B / 8B conversion unit 135 performs the 10B / 8B conversion on the composite 10-bit word string data DZC (10) by the word synchronization signal CWC. Is performed under the control of synchronization by the
Bit word string data DZC (8) is formed.

At this time, the 10-bit word data DC included in the composite 10-bit word string data DZC (10)
10 is converted to 8-bit word data DC8. Further, ± DXX · X, ± DXX · X, which are 10-bit word data included in a portion based on the additional word data group DWS in the composite 10-bit word string data DZC (10).
K28.5 and D21.3 are converted into 8-bit word data DEX8, 8-bit word synchronization data DEK8, and 8-bit auxiliary word data DEA8, respectively. As a result, the composite 8-bit word string data DZC (8) obtained in the 10B / 8B conversion unit 135 corresponds to the composite 8-bit word string data DZC (8) shown in FIG. 7A or FIG. It shall be.

The composite 8-bit word string data DZC (8) from the 10B / 8B conversion unit 135 is supplied to the speed conversion / synchronization data separation unit 136. The word conversion signal CWC from the synchronization signal forming unit 134 is also supplied to the speed conversion / synchronization data separation unit 136. Then, in the speed conversion / synchronization data separation unit 136, the word synchronization signal CWC
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZC (8).
Second 8-bit word string data DX to be 25 MBps
C (8), 8-bit word data DEX8, 8-bit word synchronization data DEK8, and 8-bit auxiliary word data DEA8 forming the additional word data group DWS.
Are separated and taken out, and the taken out 8
The bit word sequence data DXC (8) is subjected to rate conversion from a word transmission rate of 106.25 MBps to a word transmission rate of 92.8125 MBps.

The 8-bit word string data DXC (8) with the word transmission rate of 92.8125 MBps obtained in the rate conversion / synchronous data separation section 136 is sent from the 8-bit word string data forming section 133 and is converted into a 10-bit word. The data is supplied to the column data forming unit 137.

The word synchronizing signal CWY from the synchronizing signal forming unit 108 and the word synchronizing signal CWC from the synchronizing signal forming unit 134 are also supplied to the skew absorption control signal forming unit 138. In the skew absorption control signal forming section 138, the wavelength of the optical signal SLY is 1.3 μm based on the time difference between the word synchronization signal CWY and the word synchronization signal CWC.
m, whereas the optical signal SLC has a wavelength of 1.55 μm.
Detecting the time difference between the optical signal SLY and the optical signal SLC,
Skew absorption control signal SKY corresponding to the detected time difference
And SKC, and supplies them to the 10-bit word string data forming unit 130 and the 10-bit word string data forming unit 137, respectively.

In 10-bit word string data forming section 130, 8-bit word string data DXY (8) is controlled under timing control by skew absorption control signal SKY.
Is a Y data series DYV which is 10-bit quantized digital data having a word transmission rate of 74.25 MBps.
Convert to Thereby, Y reproduced from the 10-bit word string data forming unit 130 without skew due to the time difference between the optical signal SLY and the optical signal SLC.
The data series DYV is obtained.

Similarly, in 10-bit word string data forming section 137, 8-bit word string data DX is controlled under timing control by skew absorption control signal SKC.
C (8) is represented by P _B / P _R which is 10-bit quantized digital data having a word transmission rate of 74.25 MBps.
Convert to a data series DCV. Thereby, the 10-bit word sequence data forming unit 137, the optical signal SLY and P are reproduced without skew due to the time difference between the optical signal SLC _B / P _R data sequence DCV is obtained.

FIG. 24 shows another example of the data transmission method according to any one of the first to tenth aspects of the present invention. In the data transmission apparatus shown in FIG. An example of a data receiving device that receives the optical signal SLBG and the optical signal SLR transmitted from the transmission signal forming unit 52 and the transmission signal forming unit 64, respectively, is shown.

In the example of the data receiving apparatus shown in FIG. 24, for example, a demodulation section 140 for receiving an optical signal SLBG transmitted through a data transmission line formed using an optical fiber, Demodulation unit 1 for receiving an optical signal SLR transmitted through a data transmission line formed using an optical fiber
41 are provided.

In demodulation section 140, optical signal SLBG
Receive the optical signal SLBG, demodulate the received optical signal SLBG, and perform serial data DSB based on the optical signal SLBG.
G is reproduced, and the reproduced serial data DSBG is converted to S /
It is supplied to the P conversion / word synchronization data detection unit 142.

S / P conversion / word synchronous data detector 14
In step 2, the serial data DSBG is subjected to serial / parallel conversion to set the word transmission rate to 53.12, for example, as shown in A of FIG. 25 or A of FIG.
First composite 10 which is parallel data of 5 MBps
The bit word string data DZBG (10) is formed. Then, the composite 10-bit word string data DZBG (1) obtained from the S / P conversion / word synchronization data detection unit 142
0) is supplied to the 8-bit word string data forming unit 143.

Further, in S / P conversion / word synchronous data detecting section 142, additional word data group D in composite 10-bit word string data DZBG (10) is output.
1 where RD is positive (+) included in the part based on WS
Detects + K28.5 which is 0-bit word synchronization data and sends out a word synchronization data detection output signal SWS.
When the composite 10-bit word sequence data DZBG (10) is as shown in FIG. 25A, the word synchronous data detection output signal SWS is + K28. 5 and obtained as shown in FIG.
The 0-bit word string data DZBG (10) is A
In the composite 10-bit word string data DZBG (10),
This is obtained as shown in FIG. 26B, corresponding to 8.5.

S / P conversion / word synchronous data detecting section 14
2 is a word synchronous data detection output signal SWS obtained from
Is supplied to the synchronization signal forming unit 144. In synchronization signal forming section 144, word synchronization data detection output signal S
A word synchronization signal CWBG based on WS is formed.

S / P conversion / word synchronous data detecting section 14
2 compound 10-bit word string data DZBG (1
0) is supplied to the 8-bit word string data forming unit 143.
The word synchronizing signal CW from the synchronizing signal forming unit 144
BG is also supplied. Then, in the 8-bit word string data forming section 143, the composite 10-bit word string data DZBG (10) and the word synchronization signal CWBG are converted into 10B.
Supplied to the / 8B converter 145, and supplied to the 10B / 8B converter 1
45, the composite 10-bit word string data DZBG
The 10B / 8B conversion for (10) is performed under the condition that the synchronization control by the word synchronization signal CWBG is performed, thereby forming the composite 8-bit word string data DZBG (8).

At this time, the 10-bit word data D included in the composite 10-bit word string data DZBG (10)
BG10 is converted into 8-bit word data DBG8. The composite 10-bit word string data DZBG (1
0), which are 10-bit word data ± DXX included in the portion based on the additional word data group DWS.
X and ± K28.5 are converted into 8-bit word data DEX8 and 8-bit word synchronization data DEK8, respectively. As a result, composite 8-bit word string data DZBG (8) obtained in 10B / 8B conversion section 145.
Is equivalent to the composite 8-bit word string data DZBG (8) shown in FIG. 11A or FIG. 12A.

The composite 8-bit word string data DZBG (8) from the 10B / 8B converter 145 is supplied to the speed converter / synchronous data separator 146. The word conversion signal CWBG from the synchronization signal forming unit 144 is also supplied to the speed conversion / synchronization data separation unit 146. And speed conversion
In the synchronization data separation unit 146, the word synchronization signal C
Under the synchronization control by the WBG, the first 8-bit word string data DBG (8) having a word transmission rate of 53.125 MBps and the additional word data group are obtained from the composite 8-bit word string data DZBG (8). DWS
Are separated and taken out from the 8-bit word data DEX8 and the 8-bit word synchronization data DEK8, and the taken out 8-bit word string data DBG
In (8), the speed conversion is performed from the word transmission speed of 53.125 MBps to the word transmission speed of 33.75 MBps.

The 8-bit word string data DBG (8) having a word transmission rate of 33.75 MBps obtained by the rate conversion / synchronous data separation section 146 is sent from the 8-bit word string data forming section 143, and has a 10-bit word length. The data is supplied to the column data forming unit 147.

In the demodulation section 141, the optical signal S
When receiving the LR, the received optical signal SLR is subjected to demodulation processing to obtain serial data DSR based on the optical signal SLR.
And supplies the reproduced serial data DSR to the S / P conversion / word synchronous data detection unit 148.

S / P conversion / word synchronous data detecting section 14
In FIG. 8, serial / parallel conversion is performed on the serial data DSR to set the word transmission rate to 53.125, for example, as shown in FIG. 27A or FIG. 28A.
Second composite 10-bit word string data DZR (10), which is parallel data of MBps, is formed. Then, the composite 10-bit word string data DZR (10) obtained from the S / P conversion / word synchronous data detection unit 148
Is supplied to the 8-bit word string data forming unit 149.

Further, in S / P conversion / word synchronous data detecting section 148, additional word data group DW in composite 10-bit word string data DZR (10) is output.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
When the composite 10-bit word string data DZR (10) is as shown in FIG. 27A, the word synchronous data detection output signal SWS is + K28. If the composite 10-bit word string data DZR (10) is obtained as shown in FIG. 27B corresponding to FIG. 27 and is as shown in FIG. This is obtained as shown in FIG. 28B, corresponding to + K28.5 in the column data DZR (10).

S / P conversion / word synchronous data detecting section 14
8 is a word synchronous data detection output signal SWS obtained from
Is supplied to the synchronization signal forming unit 150. In synchronization signal forming section 150, word synchronization data detection output signal S
A word synchronization signal CWR based on WS is formed.

S / P conversion / word synchronous data detecting section 14
8 to compound 10-bit word string data DZR (10)
Is supplied to the 8-bit word string data forming unit 149, and the word synchronizing signal CWR from the synchronizing signal forming unit 150
Is also supplied. Then, in the 8-bit word string data forming section 149, the composite 10-bit word string data DZ
R (10) and the word synchronizing signal CWR are supplied to the 10B / 8B converter 151, and the 10B / 8B converter 151 performs the 10B / 8B conversion on the composite 10-bit word string data DZR (10) by the word synchronizing signal CWR. Is performed under the control of synchronization by the
Bit word string data DZR (8) is formed.

At this time, the 10-bit word data DR included in the composite 10-bit word string data DZR (10)
10 is converted into 8-bit word data DR8. Further, ± DXX.X and ± K28.5, which are 10-bit word data included in the portion based on the additional word data group DWS in the composite 10-bit word string data DZR (10), are respectively 8-bit word data DEX8.
And 8 bit word synchronous data DEK8.
As a result, the composite 8-bit word string data DZR (8) obtained in the 10B / 8B conversion unit 151 corresponds to the composite 8-bit word string data DZR (8) shown in FIG. 14A or FIG. It shall be.

The composite 8-bit word string data DZR (8) from the 10B / 8B converter 151 is supplied to the speed converter / synchronous data separator 152. The word conversion signal CWR from the synchronization signal forming unit 150 is also supplied to the speed conversion / synchronization data separation unit 152. Then, in the speed conversion / synchronization data separation unit 152, the word synchronization signal CWR
, The word transmission rate is set to 26.5 from the composite 8-bit word string data DZR (8).
Second 8-bit word string data D of 625 MBps
R (8) and 8-bit word data DEX8 and 8-bit word synchronization data DEK8 forming the additional word data group DWS are separated and extracted, and the extracted 8-bit word string data DR (8)
Then, a rate conversion from a word transmission rate of 26.5625 MBps to a word transmission rate of 16.875 MBps is performed.

The 8-bit word string data DR (8) having a word transmission rate of 16.875 MBps obtained by the rate conversion / synchronous data separation section 152 is sent from the 8-bit word string data forming section 149, and is output from the 10-bit word. The data is supplied to the column data forming unit 153.

The word synchronization signal CWBG from the synchronization signal forming section 144 and the word synchronization signal CWR from the synchronization signal forming section 150 are also supplied to the skew absorption control signal forming section 154. In skew absorption control signal forming section 154, word synchronizing signal CWBG and word synchronizing signal CWR
Based on the time difference between the optical signal SLBG and the optical signal SBG.
A time difference between the optical signal SLBG and the optical signal SLR, which is caused by the fact that the LR and the LR have different wavelengths, is detected, and the skew absorption control signals SKBG and SKR corresponding to the detected time difference are formed. Then, they are supplied to the 10-bit word string data forming section 147 and the 10-bit word string data forming section 153, respectively.

In the 10-bit word string data forming section 147, the 8-bit word string data DBG is controlled under the timing control by the skew absorption control signal SKBG.
(8) is converted into blue primary color signal information data DBV and green primary color signal information data DGV, each of which is 10-bit quantized digital data having a word transmission rate of 13.5 MBps.
And convert to Thus, the 10-bit word string data forming section 147 outputs the blue primary color signal information data DBV and the green primary color signal information data DGV reproduced without skew due to the time difference between the optical signal SLBG and the optical signal SLR. Is obtained.

Similarly, in 10-bit word string data forming section 153, 8-bit word string data DR is controlled under timing control by skew absorption control signal SKR.
(8) is changed to a word transmission rate of 13.5 MBps.
It is converted into red primary color signal information data DRV which is 0-bit quantized digital data. As a result, red primary color signal information data DRV reproduced without skew due to the time difference between the optical signal SLBG and the optical signal SLR is obtained from the 10-bit word string data forming unit 153.

FIG. 29 shows a transmission signal in the data transmission apparatus shown in FIG. 16 according to an example of the data transmission method according to any one of claims 11 to 16 of the present application. An example of a data receiving device that receives the optical signals SLA and SLB and the optical signal SLD sent from the forming unit 76, the transmission signal forming unit 82, and the transmission signal forming unit 89, respectively, is shown.

In the example of the data receiving apparatus shown in FIG. 29, for example, a demodulation section 160 for receiving an optical signal SLA transmitted through a data transmission line formed by using an optical fiber, Demodulation unit 16 for receiving an optical signal SLB transmitted through a data transmission path formed by using an optical fiber
1 and an optical signal SL transmitted through a data transmission line formed using, for example, an optical fiber.
And a demodulation unit 162 for receiving D.

Upon receiving the optical signal SLA, the demodulation section 160 demodulates the received optical signal SLA, reproduces the serial data DSA based on the optical signal SLA, and converts the reproduced serial data DSA into an S / S signal. It is supplied to the P conversion / word synchronization data detection unit 165.

S / P conversion / word synchronous data detector 16
5, serial / parallel conversion is performed on the serial data DSA, and for example, the word transmission rate is set to 106.
Form composite 10-bit word string data DZA (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZA (10) obtained from the S / P conversion / word synchronous data detection unit 165 is 8 bits.
The data is supplied to the bit word string data forming unit 166.

Further, in S / P conversion / word synchronous data detecting section 165, additional word data group DW in composite 10-bit word string data DZA (10) is provided.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 165 is supplied to the synchronization signal formation unit 167. In synchronization signal forming section 167, word synchronization signal CWA based on word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 16
5, the composite 10-bit word string data DZA (10)
Is supplied to the 8-bit word string data forming unit 166, the word synchronizing signal CWA from the synchronizing signal forming unit 167.
Is also supplied. Then, in the 8-bit word string data forming unit 166, the composite 10-bit word string data DZ
A (10) and the word synchronization signal CWA are supplied to the 10B / 8B conversion section 168, and the 10B / 8B conversion section 168 performs the 10B / 8B conversion on the composite 10-bit word string data DZA (10) by the word synchronization signal CWA. Is performed under the control of synchronization by the
Bit word string data DZA (8) is formed.

The composite 8-bit word string data DZA (8) from the 10B / 8B converter 168 is supplied to the speed converter / synchronous data separator 169. The word conversion signal CWA from the synchronization signal forming unit 167 is also supplied to the speed conversion / synchronization data separation unit 169. Then, in the speed conversion / synchronization data separation unit 169, the word synchronization signal CWA
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZA (8).
8-bit word string data DA (8) with 25 MBps
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and 8-bit auxiliary word data DEA8 are separated and taken out, and the taken-out 8-bit word string data DA (8) is added with a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DA (8) having a word transmission rate of 74.25 MBps obtained in the rate conversion / synchronous data separation section 169 is sent from the 8-bit word string data formation section 166 and is converted into a bit synthesis section. 1
70.

The demodulation section 161 outputs the optical signal S
Upon receiving the LB, the received optical signal SLB is subjected to demodulation processing to obtain serial data DSB based on the optical signal SLB.
And supplies the reproduced serial data DSB to the S / P conversion / word synchronous data detection unit 171.

S / P conversion / word synchronous data detecting section 17
1, serial / parallel conversion is performed on the serial data DSB, and for example, the word transmission speed is set to 106.
Form composite 10-bit word string data DZB (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZB (10) obtained from the S / P conversion / word synchronization data detection unit 171 is 8 bits.
The data is supplied to the bit word string data forming unit 172.

Further, in S / P conversion / word synchronous data detecting section 171, additional word data group DW in composite 10-bit word string data DZB (10) is provided.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 171 is supplied to the synchronization signal formation unit 173. In synchronization signal forming section 173, word synchronization signal CWB based on word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 17
Compound 10-bit word string data DZB (10) from 1
The word synchronizing signal CWB from the synchronizing signal forming unit 173 is supplied to the 8-bit word string data forming unit 172 to which
Is also supplied. Then, in the 8-bit word string data forming section 172, the composite 10-bit word string data DZ
B (10) and the word synchronization signal CWB are supplied to the 10B / 8B conversion section 174, where the 10B / 8B conversion of the composite 10-bit word string data DZB (10) is performed by the word synchronization signal CWB. Is performed under the control of synchronization by the
Bit word string data DZB (8) is formed.

The composite 8-bit word string data DZB (8) from the 10B / 8B conversion section 174 is supplied to the speed conversion / synchronization data separation section 175. The word conversion signal CWB from the synchronization signal forming unit 173 is also supplied to the speed conversion / synchronization data separation unit 175. Then, in the speed conversion / synchronization data separation unit 175, the word synchronization signal CWB
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZB (8).
8-bit word string data DB (25 MBps) (8)
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and the 8-bit auxiliary word data DEA8 are separated and taken out, and the taken-out 8-bit word string data DB (8) has a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DB (8) having a word transmission rate of 74.25 MBps obtained in the rate conversion / synchronization data separation section 175 is sent from the 8-bit word string data formation section 172, and sent to the bit synthesis section. 1
70.

Further, when receiving the optical signal SLD, the demodulation section 162 performs demodulation processing on the received optical signal SLD to obtain the serial data DS based on the optical signal SLD.
D is reproduced, and the reproduced serial data DSD is S / P
It is supplied to the conversion / word synchronization data detection unit 176.

S / P conversion / word synchronous data detecting section 17
In step S6, serial / parallel conversion is performed on the serial data DSD to set the word transmission rate to 106.
Form composite 10-bit word string data DZD (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZD (10) obtained from the S / P conversion / word synchronization data detection unit 176 is 8 bits.
The data is supplied to the bit word string data forming unit 177.

Further, in S / P conversion / word synchronous data detecting section 176, additional word data group DW in composite 10-bit word string data DZD (10) is provided.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 176 is supplied to the synchronization signal formation unit 178. In synchronization signal forming section 178, word synchronization signal CWD based on word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 17
6 compound 10-bit word string data DZD (10)
Is supplied to the 8-bit word string data forming unit 177, and the word synchronizing signal CWD from the synchronizing signal forming unit 178
Is also supplied. Then, in the 8-bit word string data forming section 177, the composite 10-bit word string data DZ
D (10) and the word synchronization signal CWD are supplied to the 10B / 8B conversion section 179, and the 10B / 8B conversion section 179 performs 10B / 8B conversion on the composite 10-bit word string data DZD (10) by the word synchronization signal CWD. This is performed under the condition that the synchronization control is performed, whereby the composite 8-bit word string data DZD (8) is formed.

The composite 8-bit word string data DZD (8) from the 10B / 8B converter 179 is supplied to the speed converter / synchronous data separator 180. The word conversion signal CWD from the synchronization signal forming unit 178 is also supplied to the speed conversion / synchronization data separation unit 180. Then, in the speed conversion / synchronization data separation unit 180, the word synchronization signal CWD
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZD (8).
8-bit word string data DD (8) with 25 MBps
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and the 8-bit auxiliary word data DEA8 are separated and taken out, and the taken-out 8-bit word string data DD (8) has a word transmission rate of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DD (8) having a word transmission rate of 74.25 MBps obtained by the rate conversion / synchronous data separation section 180 is sent from the 8-bit word string data forming section 177 and is sent to the bit separation section. 1
81. In the bit separation unit 181, 8
Each 8-bit word forming the bit word string data DD (8) is separated into four bits, and 4-bit word string data DC (4) and 4-bit word string data DD (4) are obtained. Then, the 4-bit word string data DC (4) obtained from the bit separation unit 181 is combined with the bit synthesis unit 1
70.

The word synchronizing signal CWA from the synchronizing signal forming section 167, the word synchronizing signal CWB from the synchronizing signal forming section 173 and the word synchronizing signal CWD from the synchronizing signal forming section 178 are also supplied to the skew absorption control signal forming section 182. Is done. In the skew absorption control signal forming unit 182, based on the time difference between the word synchronization signal CWBA, the word synchronization signal CWB, and the word synchronization signal CWD,
A time difference between the optical signal SLA, the optical signal SLB, and the optical signal SLD, which is caused by the optical signal SLA, the optical signal SLB, and the optical signal SLD having different wavelengths, is detected and detected. A skew absorption control signal SKW corresponding to the calculated time difference is formed,
To supply.

In the bit synthesizing unit 170, under the timing control by the skew absorption control signal SKW, the 8-bit word string data DA (8) from the speed conversion / synchronization data separation unit 169, the speed conversion / synchronization data separation unit 17
5 and the 8-bit word string data DC (8) from the bit separation unit 181.
The bit synthesizing process of (4) is performed, and a Y data sequence DYV, which is 10-bit quantized digital data having a word transmission rate of 74.25 MBps, and 10-bit quantized digital data having a word transmission rate of 74.25 MBps. A certain P _B / P _R data sequence DCV is formed. Thus, from the bit combining unit 170, the reproduced Y data sequence DYV and P _B / P _R data sequence DCV
Is derived.

FIGS. 30 and 31 show another example of the data transmission method according to the invention described in any one of claims 11 to 16 in the claims of the present application. The optical signal SLA and the optical signal S transmitted from the transmission signal forming unit 96, the transmission signal forming unit 102, the transmission signal forming unit 116, the transmission signal forming unit 122, and the transmission signal forming unit 128 in the illustrated data transmission apparatus, respectively.
An example of a data receiving device that receives LB, optical signal SLG, optical signal SLE, and optical signal SLF is shown.

In the example of the data receiving apparatus shown in FIGS. 30 and 31, each of the optical signals SLA, SLB, and the optical signal transmitted through a data transmission line formed using, for example, an optical fiber is used. SLG, SLE
And demodulators 190, 191, and 19 for receiving SLF and SLF, respectively.
2, 193 and 194 are provided.

[0220] Upon receiving the optical signal SLA, the demodulation section 190 demodulates the received optical signal SLA to reproduce serial data DSA based on the optical signal SLA, and converts the reproduced serial data DSA to S / S. It is supplied to the P conversion / word synchronization data detection unit 195.

S / P conversion / word synchronous data detecting section 19
5, serial / parallel conversion is performed on the serial data DSA, and for example, the word transmission rate is set to 106.
Form composite 10-bit word string data DZA (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZA (10) obtained from the S / P conversion / word synchronous data detecting unit 195 is 8 bits.
The data is supplied to the bit word string data forming unit 196.

Further, in S / P conversion / word synchronous data detecting section 195, additional word data group DW in composite 10-bit word string data DZA (10) is provided.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 195 is supplied to the synchronization signal formation unit 197. In the synchronization signal forming section 197, a word synchronization signal CWA based on the word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 19
5, the composite 10-bit word string data DZA (10)
Is supplied to the 8-bit word string data forming unit 196, the word synchronizing signal CWA from the synchronizing signal forming unit 197.
Is also supplied. Then, in the 8-bit word string data forming section 196, the composite 10-bit word string data DZ
A (10) and the word synchronization signal CWA are supplied to the 10B / 8B conversion section 198, and the 10B / 8B conversion section 198 performs the 10B / 8B conversion on the composite 10-bit word string data DZA (10) by the word synchronization signal CWA. Is performed under the control of synchronization by the
Bit word string data DZA (8) is formed.

The composite 8-bit word string data DZA (8) from the 10B / 8B converter 198 is supplied to the speed converter / synchronous data separator 199. The word conversion signal CWA from the synchronization signal formation unit 197 is also supplied to the speed conversion / synchronization data separation unit 199. Then, in the speed conversion / synchronization data separation unit 199, the word synchronization signal CWA
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZA (8).
8-bit word string data DA (8) with 25 MBps
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and 8-bit auxiliary word data DEA8 are separated and taken out, and the taken-out 8-bit word string data DA (8) is added with a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DA (8) having a word transmission rate of 74.25 MBps obtained by the rate conversion / synchronous data separation section 199 is sent from the 8-bit word string data forming section 196, and the bit synthesizing section. 2
00 is supplied.

Upon receiving the optical signal SLB, the demodulation section 191 performs demodulation processing on the received optical signal SLB to reproduce serial data DSB based on the optical signal SLB, and converts the reproduced serial data DSB to S / S. It is supplied to the P conversion / word synchronization data detection unit 201.

S / P conversion / word synchronous data detecting section 20
1, serial / parallel conversion is performed on the serial data DSB, and for example, the word transmission speed is set to 106.
Form composite 10-bit word string data DZB (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZB (10) obtained from the S / P conversion / word synchronization data detection unit 201 is 8 bits.
The data is supplied to the bit word string data forming unit 202.

Further, in S / P conversion / word synchronous data detecting section 201, additional word data group DW in composite 10-bit word string data DZB (10) is output.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 201 is supplied to the synchronization signal formation unit 203. In synchronization signal forming section 203, word synchronization signal CWB based on word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 20
Compound 10-bit word string data DZB (10) from 1
Is supplied to the 8-bit word string data forming unit 202, the word synchronizing signal CWB from the synchronizing signal forming unit 203.
Is also supplied. In the 8-bit word string data forming unit 202, the composite 10-bit word string data DZ
B (10) and the word synchronization signal CWB are supplied to the 10B / 8B conversion section 204, where the 10B / 8B conversion of the composite 10-bit word string data DZB (10) is performed by the word synchronization signal CWB. Is performed under the control of synchronization by the
Bit word string data DZB (8) is formed.

The composite 8-bit word string data DZB (8) from the 10B / 8B converter 204 is supplied to the speed converter / synchronous data separator 205. The word conversion signal CWB from the synchronization signal forming unit 203 is also supplied to the speed conversion / synchronization data separation unit 205. Then, in the speed conversion / synchronization data separation unit 205, the word synchronization signal CWB
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZB (8).
8-bit word string data DB (25 MBps) (8)
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and the 8-bit auxiliary word data DEA8 are separated and taken out, and the taken-out 8-bit word string data DB (8) has a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DB (8) having a word transmission rate of 74.25 MBps obtained by the rate conversion / synchronous data separation section 205 is sent from the 8-bit word string data forming section 202 and is subjected to the bit synthesizing section. 2
00 is supplied.

Upon receiving the optical signal SLG, the demodulation section 192 demodulates the received optical signal SLG to reproduce serial data DSG based on the optical signal SLG, and converts the reproduced serial data DSG to S / S It is supplied to the P conversion / word synchronization data detection unit 206.

S / P conversion / word synchronous data detecting section 20
6, serial / parallel conversion is performed on the serial data DSG, and for example, the word transmission rate is set to 106.
Form composite 10-bit word string data DZG (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZG (10) obtained from the S / P conversion / word synchronization data detection unit 206 is 8 bits.
The data is supplied to the bit word string data forming unit 207.

Further, in S / P conversion / word synchronous data detecting section 206, additional word data group DW in composite 10-bit word string data DZG (10) is output.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 206 is supplied to the synchronization signal formation unit 208. In synchronization signal forming section 208, word synchronization signal CWG based on word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 20
6 compound 10-bit word string data DZG (10)
Is supplied to the 8-bit word string data forming unit 207, the word synchronizing signal CWG from the synchronizing signal forming unit 208.
Is also supplied. Then, in the 8-bit word string data forming unit 207, the composite 10-bit word string data DZ
G (10) and the word synchronization signal CWG are supplied to the 10B / 8B conversion unit 209, and the 10B / 8B conversion unit 209 performs 10B / 8B conversion on the composite 10-bit word string data DZG (10) by the word synchronization signal CWG. Is performed under the control of synchronization by the
Bit word string data DZG (8) is formed.

The composite 8-bit word string data DZG (8) from the 10B / 8B converter 209 is supplied to the speed converter / synchronous data separator 210. The word conversion signal CWG from the synchronization signal forming unit 208 is also supplied to the speed conversion / synchronization data separation unit 210. Then, in the speed conversion / synchronization data separation section 210, the word synchronization signal CWG
, And the word transmission rate is set to 106. from the composite 8-bit word string data DZG (8).
8-bit word string data DG (8) with 25 MBps
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and the 8-bit auxiliary word data DEA8 are separated and taken out, and the taken-out 8-bit word string data DG (8) has a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DG (8) having a word transmission rate of 74.25 MBps obtained in the rate conversion / synchronous data separation section 210 is sent from the 8-bit word string data formation section 207, and is sent to the bit separation section. 2
11 is supplied. In the bit separation unit 211, 8
Each 8-bit word forming the bit word string data DG (8) is separated into 4 bits, and 4-bit word string data DC (4) and 4-bit word string data DD (4) are obtained. Then, the 4-bit word string data DC (4) obtained from the bit separation unit 211 is output to the bit synthesis unit 2
00 is supplied.

The word synchronizing signal CWA from the synchronizing signal forming unit 197, the word synchronizing signal CWB from the synchronizing signal forming unit 203 and the word synchronizing signal CWG from the synchronizing signal forming unit 208 are also supplied to the skew absorption control signal forming unit 212. Is done. In the skew absorption control signal forming section 212, the optical signal SLA, the optical signal SLB, and the optical signal SLG have different wavelengths based on the time difference between the word synchronization signal CWA, the word synchronization signal CWB, and the word synchronization signal CWG. A time difference between the optical signal SLA, the optical signal SLB, and the optical signal SLG, which is generated due to the above, is detected, and a skew absorption control signal SKM corresponding to the detected time difference is formed. Is supplied to the bit synthesizing unit 200.

In the bit synthesizing unit 200, under the timing control by the skew absorption control signal SKM, the 8-bit word string data DA (8) from the speed conversion / synchronization data separation unit 199, the speed conversion / synchronization data separation unit 20
5 and the 4-bit word string data DC from the bit separation unit 211.
The bit synthesizing process of (4) is performed, and a Y data sequence DYA which is 10-bit quantized digital data having a word transmission rate of 74.25 MBps and 10-bit quantized digital data having a word transmission rate of 74.25 MBps are obtained. A certain P _B / P _R data sequence DCA is formed. Thus, from the bit combining unit 170, the reproduced Y data sequence DYA and P _B / P _R data sequence DCA
Is derived.

Upon receiving the optical signal SLE, the demodulation section 193 performs demodulation processing on the received optical signal SLE, and performs serial data DS based on the optical signal SLE.
E is reproduced, and the reproduced serial data DSE is S / P
The conversion / word synchronization data detection unit 213 is supplied.

S / P conversion / word synchronous data detecting section 21
3, serial / parallel conversion is performed on the serial data DSE, and for example, the word transmission speed is set to 106.
Form composite 10-bit word string data DZE (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZE (10) obtained from the S / P conversion / word synchronization data detection unit 213 has 8 bits.
The data is supplied to the bit word string data forming unit 214.

Further, in S / P conversion / word synchronous data detecting section 213, additional word data group DW in composite 10-bit word string data DZE (10) is provided.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 213 is supplied to the synchronization signal formation unit 215. In synchronization signal forming section 215, word synchronization signal CWE based on word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 21
3 composite 10-bit word string data DZE (10)
Is supplied to the 8-bit word string data forming section 214, the word synchronizing signal CWE from the synchronizing signal forming section 215 is provided.
Is also supplied. Then, in the 8-bit word string data forming unit 214, the composite 10-bit word string data DZ
E (10) and the word synchronization signal CWE are supplied to the 10B / 8B conversion section 216, and the 10B / 8B conversion section 216 performs the 10B / 8B conversion on the composite 10-bit word string data DZE (10) by the word synchronization signal CWE. Is performed under the control of synchronization by the
Bit word string data DZE (8) is formed.

The composite 8-bit word string data DZE (8) from the 10B / 8B converter 216 is supplied to the speed converter / synchronous data separator 217. The word conversion signal CWE from the synchronization signal forming unit 215 is also supplied to the speed conversion / synchronization data separation unit 217. Then, in the speed conversion / synchronization data separation unit 217, the word synchronization signal CWE
, And the word transmission rate is set to 106. based on the composite 8-bit word string data DZE (8).
8-bit word string data DE (8) at 25 MBps
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and 8-bit auxiliary word data DEA8 are separated and taken out, and the taken 8-bit word string data DE (8) is added with a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DE (8) having a word transmission rate of 74.25 MBps obtained by the rate conversion / synchronous data separation section 217 is sent from the 8-bit word string data forming section 214, and the bit synthesizing section. 2
18.

Further, when receiving the optical signal SLF, the demodulation section 194 performs demodulation processing on the received optical signal SLF to obtain the serial data DS based on the optical signal SLF.
F. Reproduce serial data DSF by S / P
It is supplied to the conversion / word synchronization data detection unit 219.

S / P conversion / word synchronous data detecting section 21
9, serial / parallel conversion is performed on the serial data DSF and, for example, the word transmission rate is set to 106.
Form composite 10-bit word string data DZF (10), which is parallel data of 25 MBps. And
The composite 10-bit word string data DZF (10) obtained from the S / P conversion / word synchronous data detection unit 219 is 8 bits.
The data is supplied to the bit word string data forming unit 220.

Further, in S / P conversion / word synchronous data detecting section 219, additional word data group DW in composite 10-bit word string data DZF (10) is output.
RD is positive (+) included in the portion based on S 10
It detects + K28.5 which is bit word synchronization data, and sends out a word synchronization data detection output signal SWS.
The word synchronization data detection output signal SWS obtained from the S / P conversion / word synchronization data detection unit 219 is supplied to the synchronization signal formation unit 221. In the synchronization signal forming section 221, a word synchronization signal CWF based on the word synchronization data detection output signal SWS is formed.

S / P conversion / word synchronous data detecting section 21
9 compound 10-bit word string data DZF (10)
Is supplied to the 8-bit word string data forming unit 220, the word synchronizing signal CWF from the synchronizing signal forming unit 221
Is also supplied. In the 8-bit word string data forming section 220, the composite 10-bit word string data DZ
F (10) and the word synchronization signal CWF are supplied to the 10B / 8B conversion section 222, where the 10B / 8B conversion of the composite 10-bit word string data DZF (10) is performed by the word synchronization signal CWF. Is performed under the control of synchronization by the
Bit word string data DZF (8) is formed.

The composite 8-bit word string data DZF (8) from the 10B / 8B converter 222 is supplied to the speed converter / synchronous data separator 223. The word conversion signal CWF from the synchronization signal forming unit 221 is also supplied to the speed conversion / synchronization data separation unit 223. Then, in the speed conversion / synchronization data separation unit 221, the word synchronization signal CWF
, And the word transmission rate is set to 106. based on the composite 8-bit word string data DZF (8).
8-bit word string data DF (8) with 25 MBps
And 8-bit word data DEX8 and 8-bit word synchronization data D forming the additional word data group DWS.
EK8 and 8-bit auxiliary word data DEA8 are separated and extracted, and the extracted 8-bit word string data DF (8) is set to a word transmission speed of 106.
The word transmission rate is set to 74.
A speed conversion to 25 MBps is performed.

The 8-bit word string data DF (8) with the word transmission rate of 74.25 MBps obtained by the rate conversion / synchronous data separation section 223 is sent out from the 8-bit word string data forming section 220 and sent to the bit synthesizing section. 2
18.

The bit synthesizing unit 218 includes the bit separating unit 2
Also, 4-bit word string data DD (4) obtained from 11 is supplied. Further, the bit synthesizing unit 218 is supplied with a synchronization control signal SYC common to the bit synthesizing unit 200, and the bit synthesizing unit 218 is synchronized with the bit synthesizing unit 200.

The word synchronizing signal CWG from the synchronizing signal forming section 208, the word synchronizing signal CWE from the synchronizing signal forming section 215 and the word synchronizing signal CWF from the synchronizing signal forming section 221 are also supplied to the skew absorption control signal forming section 224. Is done. In the skew absorption control signal forming section 224, the optical signal SLG, the optical signal SLE, and the optical signal SLF have different wavelengths based on the time difference between the word synchronization signal CWG, the word synchronization signal CWE, and the word synchronization signal CWF. The optical signal S caused by the
A time difference between the LG, the optical signal SLE, and the optical signal SLF is detected, a skew absorption control signal SKN corresponding to the detected time difference is formed, and the skew absorption control signal SKN is supplied to the bit synthesizing unit 218.

In the bit synthesizing unit 218, under the timing control by the skew absorption control signal SKN, the 8-bit word string data DE (8) from the speed conversion / synchronization data separation unit 217, the speed conversion / synchronization data separation unit 22
And the 4-bit word string data DD from the bit separation unit 211.
The bit synthesizing process of (4) is performed, and a Y data sequence DYB, which is 10-bit quantized digital data with a word transmission rate of 74.25 MBps, and 10-bit quantized digital data with a word transmission rate of 74.25 MBps. A certain P _B / P _R data sequence DCB is formed. Thus, from the bit combining unit 218, the reproduced Y data sequence DYB and P _B / P _R data sequence DCB
Is derived.

In each example of the data transmission method according to the invention described in the claims of the present application, the additional word data group DWS is assumed to be included in the composite 8-bit word string data. By performing the 8B / 10B conversion, a portion including + K28.5 which is 10-bit word synchronization data in which the RD is always positive (+) in the composite 10-bit word string data is necessarily formed. In the data transmission method according to the invention described in the appended claims, the additional word data group DWS is subjected to 8B / 10B conversion under the assumption that it is included in the composite 8-bit word string data, so that -K2 which is 10-bit word synchronization data in which RD is always negative (-) in 10-bit word string data
A part including 8.5 may be formed.
In such a case, FIG. 19, FIG. 24, FIG.
31. In the data receiving apparatus shown in FIG. 31, the S / P conversion / word synchronization data detection unit detects -K28.5, which is 10-bit word synchronization data with RD being negative (-), and performs word synchronization. A data detection output signal SWS is transmitted.

[0256]

As is apparent from the above description, according to the data transmission method according to any one of the first to tenth aspects of the present invention, the data is transmitted to be transmitted. For example, luminance signal information data and color difference signal information data each forming a digital video signal, or two of first, second and third primary color signal information data forming a digital video signal, respectively.
RD is a predetermined positive or negative value for each of the first and second composite 10-bit word string data based on the first and second digital image information data. This means that 10-bit word synchronization data is included. Each of the first and second composite 10-bit word string data based on the first and second digital image information data, which is transmitted to be transmitted in this manner, is received by the receiving side to detect the word synchronization data. Is performed by detecting only 10-bit word synchronization data with RD being positive or by detecting only 10-bit word synchronization data with RD being negative. On the side, it is assumed that the 10-bit word synchronization data is properly detected as word synchronization data required for conversion from 10-bit word string data to 8-bit word string data and the like. Therefore, on the receiving side, data synchronization required for processing for reproducing the first and second digital image information data based on the received first and second composite 10-bit word string data is provided. A state where the state can be reliably obtained is secured.

That is, according to the data transmission method according to any one of the first to tenth aspects of the present invention, each of the first and second digital image information data is The luminance signal information data and the color difference signal information data forming the digital video signal, or two of the first, second and third primary color signal information data forming the digital video signal and the remaining data. When the number is one, 8-bit word string data to which 8-bit word synchronization data is added is formed based on data representing a digital video signal to be transmitted, and the 8-bit word string data is converted by 8B / 10B conversion. , Based on data representing digital video signals
It is converted into 10-bit word string data including 0-bit word data and 10-bit word synchronization data,
According to the transmission method in which the 0-bit word string data is transmitted to be transmitted, the data representing the digital video signal can be divided into a plurality of channel data and multiplexed.

According to the data transmission method according to any one of the eleventh to sixteenth aspects of the present invention, a digital video signal to be transmitted is formed. For each of the plurality of composite 10-bit word string data based on the plurality of 8-bit word string data obtained by the bit division processing of the luminance signal information data and the color difference signal information data, RD is set to a predetermined positive or negative value. 10-bit word synchronization data. Then, for each of the plurality of composite 10-bit word string data based on the plurality of 8-bit word string data transmitted to be transmitted as described above, the receiving side receives the word synchronous data detection and sets RD to positive. Regardless of whether the detection is performed by detecting only the 10-bit word synchronization data or the detection by detecting only the 10-bit word synchronization data having a negative RD, the reception side performs the 10-bit word synchronization. It is assumed that the data is properly detected as word synchronization data required for conversion from 10-bit word string data to 8-bit word string data. Therefore, on the receiving side, a data synchronization state required for processing for reproducing a plurality of 8-bit word string data based on the received plurality of composite 10-bit word string data can be reliably obtained. The state is secured.

That is, according to the data transmission method according to any one of the eleventh to sixteenth aspects of the present invention, based on the data representing the digital video signal to be transmitted, 8-bit word string data to which 8-bit word synchronization data is added is formed, and the 8-bit word string data is subjected to 8B / 10B conversion to generate 10-bit word data and 10-bit word synchronization data based on data representing a digital video signal. The data representing the digital video signal can be divided into a plurality of channel data and multiplex-transmitted by a transmission method in which the data is converted into 10-bit word string data containing the data and the 10-bit word string data is transmitted to be transmitted. become.

Further, in the data transmission device according to the invention described in claim 17 of the present application, for example, each digital video signal transmitted to be transmitted by the data transmitting means is transmitted. The luminance signal information data and the color difference signal information data to be formed, or two and the remaining one of the first, second and third primary color signal information data forming the digital video signal.
First based on the first and second digital image information data
And the second composite 10-bit word string data,
This means that 10-bit word synchronization data with RD being predetermined positive or negative is included. Such 10-bit word synchronization data is, for example, + K28.5 which is the word data DS10 whose RD is positive, or -K2 which is the word data DS10 whose RD is negative.
8.5. The RD of the 10-bit word synchronization data included in each of the first and second composite 10-bit word string data is the transmitted first and second composite 10-bit word data.
Whether the word synchronization data detection on the receiving side receiving the bit word string data detects only the word synchronization data having RD as positive or only the word synchronization data having RD as negative. Depending on,
It is set to positive or negative in advance.

Each of the first and second composite 10-bit word string data based on the first and second digital image information data, which is transmitted to be transmitted in this manner, is transmitted to the word synchronizing data by the receiving side. Regardless of whether the detection is performed by detecting only the word synchronization data with RD being positive, or the detection is performed by detecting only the word synchronization data with RD negative, on the receiving side, The 10-bit word synchronization data is
It is assumed that the data is properly detected as word synchronization data required for conversion from 10-bit word string data to 8-bit word string data. Therefore, on the receiving side, data synchronization required for processing for reproducing the first and second digital image information data based on the received first and second composite 10-bit word string data is provided. A state where the state can be reliably obtained is secured.

That is, according to the data transmission apparatus of the invention described in claim 17 of the present application, the first and second digital image information data are each composed of a luminance which forms a digital video signal. When the signal information data and the color difference signal information data are used, or when two of the first, second and third primary color signal information data forming the digital video signal and the remaining one are used, transmission is performed. An 8-bit word string data to which word synchronization data is added is formed based on data representing a digital video signal to be performed, and the 8-bit word string data is converted into an 8-bit word string data based on data representing a digital video signal by 8B / 10B conversion. It is converted into 10-bit word string data including bit word data and 10-bit word synchronization data, With transmission method Ttowado column data is sent to be transmitted, so that it is possible to multiplex by dividing the data representing the digital image signal into a plurality of channels data.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a data transmission method according to one embodiment of the present invention; FIG. 3 is a block diagram illustrating an example of a data transmission device according to the described invention.

FIG. 2 is a block diagram showing a specific configuration example of a rate conversion / synchronization data insertion unit in the data transmission device shown in FIG. 1;

FIG. 3 is a conceptual diagram for explaining 8-bit auxiliary word data used in an example of the data transmission method according to any one of claims 1 to 10 in the claims of the present application. It is.

FIG. 4 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application.

FIG. 5 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application.

FIG. 6 is a block diagram showing a specific configuration example of a rate conversion / synchronization data insertion unit in the data transmission device shown in FIG. 1;

FIG. 7 is a time chart for explaining an example of a data transmission method according to any one of the first to tenth aspects of the present invention.

FIG. 8 is a time chart for explaining an example of the data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application.

FIG. 9 is a block diagram showing an example of a data transmission apparatus in which another example of the data transmission method according to any one of the first to tenth aspects of the present invention is implemented. It is.

10 is a block diagram illustrating a specific configuration example of a rate conversion / synchronization data insertion unit in the data transmission device illustrated in FIG. 9;

FIG. 11 is a time chart for explaining another example of the data transmission method according to any one of the first to tenth aspects of the present invention.

FIG. 12 is a time chart for explaining another example of the data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application.

13 is a block diagram showing a specific configuration example of a rate conversion / synchronization data insertion unit in the data transmission device shown in FIG. 9;

FIG. 14 is a time chart for explaining another example of the data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application.

FIG. 15 is a time chart for explaining another example of the data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application.

FIG. 16: Claim 11 in the claims of the present application
FIG. 17 is a block diagram showing an example of a data transmission device in which an example of the data transmission method according to the invention described in any one of claims to 16 is implemented.

FIG. 17: Claim 11 in the claims of the present application
FIG. 21 is a block diagram showing a portion of an example of a data transmission apparatus in which another example of the data transmission method according to the invention described in any one of claims 16 to 16 is implemented.

FIG. 18: Claim 11 in the claims of the present application
FIG. 21 is a block diagram showing a portion of an example of a data transmission apparatus in which another example of the data transmission method according to the invention described in any one of claims 16 to 16 is implemented.

FIG. 19 shows an example of a data receiving apparatus for receiving an optical signal transmitted according to an example of the data transmission method according to any one of the first to tenth aspects of the present invention. It is a block block diagram.

20 is a time chart used for describing the operation of the data receiving apparatus shown in FIG. 19.

FIG. 21 is a time chart used for describing the operation of the data receiving device shown in FIG. 19;

FIG. 22 is a time chart for explaining the operation of the data receiving apparatus shown in FIG. 19;

FIG. 23 is a time chart for explaining the operation of the data receiving apparatus shown in FIG. 19;

FIG. 24 is an example of a data receiving apparatus for receiving an optical signal transmitted according to another example of the data transmission method according to any one of claims 1 to 10 in the claims of the present application. FIG. 3 is a block diagram showing the configuration.

FIG. 25 is a time chart used for describing the operation of the data receiving apparatus shown in FIG. 24.

FIG. 26 is a time chart used for describing the operation of the data receiving apparatus shown in FIG. 24.

FIG. 27 is a time chart used for describing the operation of the data receiving device shown in FIG. 24.

FIG. 28 is a time chart used for describing the operation of the data receiving apparatus shown in FIG. 24.

FIG. 29. Claim 11 in the claims of the present application
FIG. 17 is a block diagram showing an example of a data receiving apparatus that receives an optical signal transmitted according to an example of the data transmission method according to any one of the inventions.

FIG. 30. Claim 11 in the claims of the present application
FIG. 17 is a block diagram showing a part of an example of a data receiving apparatus for receiving an optical signal transmitted in accordance with another example of the data transmission method according to any one of the inventions according to the present invention.

FIG. 31. Claim 11 in the claims of the present application
FIG. 17 is a block diagram showing a part of an example of a data receiving apparatus for receiving an optical signal transmitted in accordance with another example of the data transmission method according to any one of the inventions according to the present invention.

FIG. 32 is a conceptual diagram explaining a “frame” used for transmitting digital data.

FIG. 33 is a conceptual diagram explaining word synchronization data used in transmitting digital data.

FIG. 34 is a time chart showing a data format of a Y data sequence and a P _B / P _R data sequence forming a digital video signal.

FIG. 35 is a time chart showing a data format of a word multiplex data sequence forming a digital video signal.

[Explanation of symbols]

10, 25, 40, 53, 107, 133, 143, 1
49,166,172,177,196,202,20
7, 214, 220... 8-bit word string data forming unit, 11, 26, 41, 54, 71, 77, 84, 9
1,97,111,117,123,130,137,
147, 153... 10-bit word string data forming unit, 12, 27, 42, 55, 72, 78, 85, 9
2, 98, 112, 118, 124 ... speed conversion / synchronous data insertion unit, 13, 28, 43, 56, 73, 7
9,86,93,99,113,119,125 ...
Word data sending unit, 15, 19, 29, 33, 4
5, 49, 57, 61 ... switch, 16, 17,
30, 31, 46, 47, 58, 59 ... memory unit,
18, 32, 48, 60 ... memory control signal forming unit,
20, 34, 50, 62, 74, 80, 87, 94,
100, 114, 120, 126... 8B / 10B converter, 21, 35, 51, 63, 75, 81, 88,
95, 101, 115, 121, 127... P / S converter, 22, 36, 52, 64, 76, 82, 89,
96, 102, 116, 122, 128 ... transmission signal forming unit, 23 ... multiplexing unit, 70, 90, 110 ...
A bit division unit, 83, 103 ... a bit addition unit,
104: signal separation unit, 105, 131, 14
0,141,160,161,162,190,19
1, 192, 193, 194 ... demodulation unit, 106,
132, 142, 148, 165, 171, 176, 1
95, 201, 206, 213, 219... S / P conversion / word synchronous data detection unit, 108, 134, 14
4,150,167,173,178,197,20
3,208,215,221... Synchronization signal forming unit,
109, 135, 145, 151, 168, 174, 1
79, 198, 204, 209, 216, 222 ...
10B / 8B converter, 129, 136, 146, 15
2,169,175,180,199,205,21
0, 217, 223 ... speed conversion / synchronous data separation unit, 138, 154, 182, 212, 224 ...
Skew absorption control signal forming section, 170, 200, 21
8 ... bit synthesizing unit, 181, 211 ... bit separating unit

Claims (17)

[Claims] 1. First and second 8-bit word string data based on first and second digital image information data, respectively, and a predetermined 8-bit word string data are respectively assigned to the first and second 8-bit word string data. At an interval of the word, an additional word data group including specific word synchronization data, which is 8-bit word data having a preset code, is inserted, and the first and second inserted word groups are inserted. 10 for each of the 8-bit word string data of
By performing bit conversion to bit word string data, the running data obtained based on the specific word synchronization data is obtained.
Set the disparity to a predetermined positive or negative 1
Forming first and second composite 10-bit word string data having a portion based on the additional word data group including 0-bit word synchronization data, and forming the first and second composite 10-bit word string data. A data transmission method for converting the data into first and second serial data, respectively, and transmitting the first and second serial data for transmission. 2. An additional word data group is selected as a part based on the additional word data group in the composite 10-bit word string data, which includes 10-bit word synchronous data having a positive running disparity. 2. The data transmission method according to claim 1, wherein: 3. 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. 2. The data transmission method according to claim 1, wherein: 4. The additional word data group includes auxiliary word data, and when the auxiliary word data is subjected to bit conversion into 10-bit words, a running
4. The data transmission method according to claim 1, wherein the data is selected to be converted into 10-bit word data having a disparity of neutral. 5. An 8-bit word data immediately before an 8-bit word synchronization data which is converted to a 10-bit word synchronization data when bit conversion to a 10-bit word is performed, is added to a 10-bit word. 3. The data transmission method according to claim 2, wherein when the bit conversion is performed, the data is set to be set so as to be converted into 10-bit word data having a negative running disparity. 6. An 8-bit word data immediately before an 8-bit word synchronization data which is converted to a 10-bit word synchronization data when bit conversion to a 10-bit word is performed, is added to a 10-bit word. 4. The data transmission method according to claim 3, wherein when the bit conversion is performed, the data is set to be set so as to be converted into 10-bit word data having a positive running disparity. 7. The method according to claim 1, further comprising obtaining first and second optical signals based on the first and second serial data, and transmitting the first and second optical signals through an optical transmission line. 7. The data transmission method according to claim 1, wherein each of the first and second serial data is transmitted. 8. The data according to claim 7, wherein the first and second optical signals have different wavelengths, and the first and second optical signals are multiplexed and transmitted. Transmission method. 9. A digital video signal according to claim 1, wherein said first and second digital image information data are luminance signal information data forming a digital video signal and color difference signal information data forming said digital video signal, respectively. To claim 8
The data transmission method according to any of the above. 10. The first digital image information data is two of first, second, and third primary color signal information data forming a digital video signal, and the second digital image information data is 9. The data transmission method according to claim 1, wherein the remaining one of the first, second and third primary color signal information data is used. 11. A plurality of 8-bit word string data is obtained by performing bit division processing on luminance signal information data and color difference signal information data forming a digital video signal, and each of the plurality of 8-bit word string data is obtained. At a predetermined word interval, an additional word data group including specific word synchronization data which is 8-bit word data having a preset code is inserted, and a plurality of 8 words into which the additional word data group is inserted are inserted. Bit conversion is performed on each of the bit word string data into 10-bit word string data to obtain a predetermined positive or negative running disparity, which is obtained based on the specific word synchronization data. Including a plurality of data based on the additional word data group. To form a coupling 10-bit word sequence data, and converts the respective composite 10-bit word sequence data of the plurality of the serial data, the data transmission method for sending in order to transmit a plurality of serial data. 12. An additional word data group is composed of
12. A portion based on the additional word data group in the bit word string data is selected so as to include 10-bit word synchronous data having a positive running disparity.
Data transmission method as described. 13. An additional word data group is composed of a composite
12. A portion based on the additional word data group in bit word string data, which is selected to include 10-bit word synchronous data having a negative running disparity.
Data transmission method as described. 14. The supplementary word data group includes auxiliary word data. When the auxiliary word data is subjected to bit conversion into 10-bit words, the auxiliary word data is converted into 10-bit word data having a running disparity of neutral. 14. The data transmission method according to claim 11, 12 or 13, wherein the data transmission method is selected. 15. An 8-bit word data immediately before an 8-bit word synchronous data which is converted to a 10-bit word synchronous data when bit conversion into a 10-bit word is performed, is added to the 10-bit word. 13. The data transmission method according to claim 12, wherein when the bit conversion is performed, the data is set to be set so as to be converted into 10-bit word data having a negative running disparity. 16. An 8-bit word data immediately before an 8-bit word synchronous data which is converted to a 10-bit word synchronous data when bit conversion to a 10-bit word is performed, is converted into a 10-bit word. 14. The data transmission method according to claim 13, wherein when performing bit conversion, the data transmission method is selected so as to perform a set for conversion into 10-bit word data having a positive running disparity. 17. A first and second 8-bit word string forming means for obtaining first and second 8-bit word string data based on first and second digital image information data, respectively, and a preset code Word data transmitting means for transmitting an additional word data group including the specific word synchronization data converted to 8-bit word data having the following: first and second obtained by the first and second 8-bit word string forming means; For each of the 8-bit word string data of
Inserting the additional word data group sent from the word data sending means, and converting the first and second 8-bit word string data into which the additional word data group is inserted into 10-bit word string data. And including 10-bit word synchronization data having a running disparity of a predetermined positive or negative obtained based on the specific word synchronization data.
First and second 10-bit word string data forming means for forming first and second composite 10-bit word string data having a part based on the additional word data group; and the first and second 10 bits To convert the first and second composite 10-bit word string data obtained from the word string data forming means into first and second serial data, respectively, and to transmit the first and second serial data, respectively. And a data transmission unit for transmitting.