JP2001339446A - Method and device for transmitting data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly transmit plural kinds of digital video signals by a transmitting system for sending word stream data, to which 8B/10B conversion based on data to be transmitted is performed, after converting them to serial data. SOLUTION: Concerning a plurality of word stream data based on digital video signals or to form digital video signals, 8B/10B converting processing and identification code data inserting processing are applied to at least one of these data and 8B/10B converting processing is applied to the other data. A plurality of serial data are formed by applying P/S converting processing to each of a plurality of word stream data, to which both 8B/10B converting processing and identification code data inserting processing or only 8B/10B converting processing is applied, compound serial data are formed by applying bit multiple synthesizing processing to these data and these compound serial data are sent out to be transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention described in the claims of the present application is based on a digital video signal or a plurality of word string data to be formed by a digital video signal. A data transmission method in which after performing 8 bit / 10 bit conversion, performing parallel / serial conversion to obtain a plurality of serial data, performing bit multiplexing processing on the serial data to form composite serial data, and transmitting the composite serial data for transmission And a data transmission device provided for the implementation.

[0002]

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

As one of such digital data transmission systems, a fiber channel system (Fibre Chord) has been proposed.
Annel System) is known. Digital data handled under a digital data transmission system such as this Fiber Channel system is
On the transmission side, for example, conversion into 10 bits is performed every 8 bits, and the conversion is performed according to a conversion table prepared in advance.
/ 10B conversion) processing and 8B / 10B
It is assumed that 10-bit word data sequentially obtained by the conversion process forms 10- or 20-bit word string data. And what is actually transmitted is 8B
Parallel / serial conversion (P / S conversion) processing for converting parallel data into serial data is further performed on 10 or 20-bit word string data formed by 10-bit word data sequentially obtained by the / 10B conversion processing. And the serial data obtained.

On the other hand, on the receiving side, the received serial data is subjected to a serial / parallel conversion (S / P conversion) process for converting the serial data into parallel data, so that a 10- or 20-bit word string is obtained. Data is formed, and the 10-bit or 20-bit word string data is converted into 8 bits every 10 bits, and the conversion is performed according to a previously prepared conversion table. 10B / 8B conversion) processing is performed. Then, the original digital video signal is reproduced from the word string data formed by performing the 10B / 8B conversion.

[0005] Data transmission in which such digital data to be transmitted is subjected to 8B / 10B conversion is performed by using 10-bit words having selected contents, thereby providing good transmission quality. Be recognized. In the following, a 10-bit word data group used in data transmission in which digital data to be transmitted is subjected to 8B / 10B conversion is referred to as 8B / 10B code data.

[0006] Under these circumstances, in each of the 10-bit word data forming the 10- or 20-bit word string data, the number of "1" s in the 10-bit words constituting the word data is greater than the number of "0" s. , The number of “0” is larger than the number of “1”, or the number of “1” is equal to the number of “0”. In expressing the respective states of the numbers “1” and “0”, for example, the concept of Running Disparity (RD) is introduced, and the number of “1” is the number of “0”. When the number is larger, the running disparity (RD) is said to be positive. When the number of “0” is larger than the number of “1”, R
RD is said to be neutral when the number of "1" is equal to the number of "0" and D is negative. 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 RD
Is referred to as neutral word data (neutral word data).

Further, as described above, 10 or 20
When the bit word string data is transmitted, the 10B / 8B conversion performed on the 10 or 20 bit word string data on the receiving side is performed by 10 or 2 bits.
It is necessary to accurately grasp each of the 10-bit word data forming the 0-bit word string data. Therefore, on the transmitting side, the 10- or 20-bit word string data transmitted as serial data is converted into word data. It is assumed that the synchronization data has been appropriately inserted. The word synchronization data is a word data having a 10-bit structure, but has a specific code which is not used as the word data having a 10-bit structure 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.

[0008] Such word synchronization data is, for example,
This is word data DWS10 having a 10-bit configuration called a code name of K28.5. FIG.
The word data DWS10 having a 10-bit configuration called by a code name of 8.5 is shown.
S10 is the RD based on the word data arranged immediately before.
Is positive (+) when the CRD is negative (-), and RD is negative when the CRD that is the RD based on the immediately preceding word data is positive (+). (Hereinafter, “0011111010” is added to + K28.5)
And "11000000101" as -K28.
5).

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

For example, the data sequence constituting the D1 signal takes the form of 10-bit word string data.
It follows the data format as shown in FIG. FIG. 28 shows a line blanking period in each line period of the D1 signal and a portion corresponding to a part of the video data period before and after the line blanking period. In such a part, immediately before a part corresponding to each video data period, four words (3F) each having a 10-bit configuration are used.
SAV, which is timing reference code data composed of F, 000,000, XYZ), is provided, and immediately after a portion corresponding to each video data period, four words (3FF, 000,000, 10FF) each having a 10-bit configuration are provided. 000, XY
Z) EAV which is timing reference code data
Is arranged. 3FF and 000 are fixed value information displayed in hexadecimal, XYZ is variable value information displayed in hexadecimal, and indicates field identification, field blanking period identification, and SAV and EAV identification.

The D1 signal forming the 10-bit word string data as shown in FIG. 28 is converted to serial data by P / S conversion processing and transmitted when transmitted. Then, on the receiving side, a portion based on SAV or EAV in the received serial data is detected, thereby performing S / P conversion processing under word synchronization to reproduce the D1 signal. .

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

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

[0014] The compressed digital video signal data such as the MPEG image information data and the compressed digital video and audio signal data obtained by adding the audio data to the digital video signal data are transmitted as serial data through a transmission path. SDTI (Serial DataTra) is an interface developed to be used for
An nsport interface has been proposed.
This SDTI is based on SMPTE (Society of Motio)
n Picture and Television Engineers: “SMPTE 305M”.

[0015] Even in the signal format under the SDTI (SDTI signal format), timing reference code data is allocated during each line period as necessary. Then, S used for transmission of compressed digital video signal data or video and audio signal data is used.
A digital signal (SDTI signal) formed according to the DTI signal format is also converted from parallel data to serial data and transmitted in the form of a transmission signal that is an electric signal or an optical signal.

Further, a high-definition television (HDTV) system which handles digitized video signals has been proposed.
V digital video signals (HD signals) are handled. The HD signal also has, for example, a Y data sequence as 10-bit word string data representing a luminance signal component in a video signal and a color difference signal component 10 in the video signal.
A predetermined portion in each of the C _B / C _R data sequence as the bit word sequence data, or the Y data sequence as the 10 bit word sequence data and the C _B / C _R data as the 10 bit word sequence data A predetermined portion in a word multiplexed data sequence obtained by performing word multiplexing processing on a sequence and a sequence is replaced with SAV and EAV.

The D1 signal, D2 signal, SDT as described above
Regarding the transmission of a digital video signal such as an I signal or an HD signal, the transmitting side performs 8B / 10B conversion on the digital video signal to be transmitted and performs 8B / 10 conversion based on the digital video signal to be transmitted.
For example, when a word string data subjected to the B conversion processing is formed and the word string data is converted into serial data and transmitted, the transmission method is used. It is desired from the viewpoint that the integrated circuit (IC) element and the like can be effectively used.

[0018]

As described above, on the transmitting side, word string data subjected to 8B / 10B conversion processing is formed based on a digital video signal to be transmitted, and the word string data is formed. D1 signal, D2 with the transmission method converted and transmitted to serial data
When transmission of a digital video signal such as a signal, an SDTI signal or an HD signal is desired, not only one digital video signal but also a plurality of digital video signals can be multiplexed and transmitted. D2 signal,
Efficient use of digital video signals such as SDTI signals or HD signals is achieved, and the range of use is further expanded. Efficient use of digital video signals such as the D1 signal, D2 signal, SDTI signal, and HD signal, or expansion of the range of use, for example, results in further development of technology in the field of business or home electronic devices. Will be.

However, conventionally, on the transmitting side, 8B / 10
A word string data subjected to the B conversion processing is formed, and the word string data is converted into serial data and transmitted by a transmission system in which a plurality of digital video signals can be prepared relatively easily by means of: There is no concrete example that realizes a transmission system capable of multiplexing and transmitting so that the signal can be reliably reproduced on the receiving side. In addition, a technique related to a transmission system capable of multiplexing and transmitting a plurality of digital video signals so that the plurality of digital video signals can be reliably reproduced on a receiving side by means that can be prepared relatively easily has been described. No literature can be found.

[0020] In view of the above, the invention described in the claims of the present application is based on data to be transmitted.
A word string data subjected to 8B / 10B conversion processing is formed, and the word string data is converted into serial data and transmitted according to a transmission method, for example, a plurality of D1 signals, D2 signals, SDTI signals or HD signals. A data transmission method and a data transmission method capable of multiplexing and transmitting a plurality of digital video signals so that they can be reliably reproduced on a receiving side by means capable of preparing a plurality of digital video signals relatively easily. A data transmission device is provided.

[0021]

A data transmission method according to the invention described in any one of claims 1 to 10 in the claims of the present application is based on a digital video signal, At least one of the plurality of word string data to be formed by the digital video signal is subjected to 8B / 10B conversion processing and identification code data insertion processing, and the above-described plurality of word string data An 8B / 10B conversion process is performed on at least one of them, and either the 8B / 10B conversion process and the identification code data insertion process or 8B / 10B conversion process is performed.
P / S conversion processing is performed on each of the plurality of word string data subjected to the / 10B conversion processing to form a plurality of serial data, and the obtained plurality of serial data is subjected to a bit multiplexing / combining processing. It forms composite serial data and sends out the composite serial data for transmission.

In particular, in the data transmission method according to the invention described in claim 4 of the present application, the identification code data insertion processing is performed by performing at least one of a plurality of word string data or a plurality of word string data. This is performed by inserting predetermined specific code data into a line blanking period portion in which at least one of the word string data is subjected to the 8B / 10B conversion processing.

[0023] Further, the data transmission apparatus according to the invention described in claim 11 or claim 12 in the claims of the present application, each of which is based on a digital video signal;
Alternatively, word string data processing means for subjecting at least one of the plurality of word string data to be formed by the digital video signal to 8B / 10B conversion processing and identification code data insertion processing, Of the word string data other than at least one of
8B / 10B conversion means for performing / 10B conversion processing, and a plurality of pieces which have been subjected to 8B / 10B conversion processing and identification code data insertion processing by word string data processing means or 8B / 10B conversion processing by 8B / 10B conversion means. P / S conversion means for performing P / S conversion processing on each of the word string data to form a plurality of serial data, and performing bit multiplexing / combining processing on the plurality of serial data obtained by the P / S conversion means. And bit transmitting means for transmitting the composite serial data obtained by the bit multiplexing means for transmission.

[0024] In the data transmission method according to any one of the first to tenth aspects of the present invention as described above, for example, the D1 signal and the D2 signal are respectively provided. , An SDTI signal or an HD signal, or a plurality of digital video signals such as a D1 signal, a D2 signal, an SDTI signal, or an HD signal. At least one of the word string data is subjected to both the 8B / 10B conversion processing and the identification code data insertion processing,
The P / S conversion processing is performed on each of the data other than at least one of the data that has been subjected to the 8B / 10B conversion processing, and further, a plurality of serial data obtained therefrom is subjected to the bit multiplexing / combining processing. Then, the composite serial data is formed, and the composite serial data is transmitted for transmission. Therefore, the transmitted composite serial data includes a portion where the identification code data inserted into at least one of the plurality of word string data is converted into serial data.

Therefore, on the receiving side receiving the transmitted composite serial data, the composite serial data received as including the part where the identification code data is converted into the serial data is subjected to bit separation processing and S / P conversion. In any one of the plurality of word string data obtained by performing the processing, the identification code data can be detected, and according to the detected identification code data,
A plurality of word string data can be properly reproduced and derived. Further, by performing both 10B / 8B conversion processing and signal separation processing or 10B / 8B conversion processing on each of the plurality of word string data reproduced and derived,
A plurality of digital video signals can be reproduced.

That is, according to the data transmission method according to any one of the first to tenth aspects of the present invention, 8B / 10B conversion is performed based on data to be transmitted. The processed word string data is formed, and the word string data is converted into serial data and transmitted, for example, into a plurality of D1 signals, D2 signals, SDTI signals, HD signals, or the like. A plurality of digital video signals can be multiplexed and transmitted so that they can be reliably reproduced on the receiving side by means that can prepare the digital video signals relatively easily.

[0027] In particular, according to the data transmission method of the invention described in claim 4 of the present application, the identification code data insertion processing is performed by performing at least one of a plurality of word string data or a plurality of word string data. Since the predetermined code data is inserted into the line blanking period of at least one of the word string data having undergone the 8B / 10B conversion processing, the word string data is Insertion of identification code data into the word string data is performed without any substantial adverse effect, and identification code data is easily and accurately detected on the receiving side.

Further, in the data transmission apparatus according to the invention described in claim 11 or claim 12 of the present application as described above, each of the data transmission apparatuses is, for example, a D
1 signal, D2 signal, SDTI signal, HD signal, or other digital video signal, or D1 signal, D2 signal, SDTI signal, or H
For a plurality of word string data to be formed by a digital video signal such as a D signal, the word string data processing means assigns at least one of them to
The 8B / 10B conversion processing and the identification code data insertion processing are performed, and the 8B / 10B conversion means performs the 8B / 10B conversion processing on at least one of them except for at least one of them. Then, the P / S conversion means has performed the word string data subjected to the 8B / 10B conversion processing obtained from the word string data processing means and the identification code data insertion processing, and the 8B / 10 data obtained from the 8B / 10B conversion means.
Each of the word string data subjected to the B-conversion processing is converted into serial data, and furthermore, P bit
A plurality of serial data obtained from the / S conversion means are bit-multiplexed and combined with the composite serial data, and the composite serial data is transmitted by the transmission means.

Therefore, the transmitted composite serial data includes a portion in which the identification code data inserted in at least one of the plurality of word string data is converted into serial data. Therefore, the receiving side that receives the transmitted composite serial data performs bit separation processing and S / P conversion processing on the composite serial data received as including the part where the identification code data has been converted to serial data. Thus, the identification code data can be detected in any of the plurality of word string data, and the plurality of word string data can be appropriately reproduced and derived according to the detected identification code data. it can. Further, by performing both the 10B / 8B conversion processing and the signal separation processing or the 10B / 8B conversion processing on each of the plurality of reproduced and derived word string data, a plurality of digital video signals can be reproduced.

That is, according to the data transmission apparatus of the invention described in claim 11 or claim 12 of the present application, based on the data to be transmitted,
A word string data subjected to 8B / 10B conversion processing is formed, and the word string data is converted into serial data and transmitted according to a transmission method, for example, a plurality of D1 signals, D2 signals, SDTI signals or HD signals. Thus, a plurality of digital video signals can be multiplexed and transmitted so that they can be reliably reproduced on the receiving side by means that can prepare the digital video signals relatively easily.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention in which an example of a data transmission method according to any one of the first to eighth aspects of the present invention is implemented. Claim 11 or Claim 12 in the range of
1 shows an example of a data transmission device according to the invention described in (1).

In the example shown in FIG. 1, a three-channel D1 signal DVA which is a plurality of digital video signals
1, DVA2 and DVA3, and the bit addition signal 2
The bit addition data DAA (2) is supplied to the signal multiplexing unit 11. Also, D1 signals DVB1, DVB2, and DV of three channels, which are other digital video signals, are used.
B3 and 2-bit additional data DA which is a bit additional signal
B (2) is supplied to the signal multiplexing unit 12.

D1 signals DVA1, DVA of three channels
2 and DVA3 respectively, and D1 of the other three channels
Each of the signals DVB1, DVB2 and DVB3 takes the form of a data series as shown in FIG. 28, for example.
A digital signal forming 0-bit word string data, the word transmission rate of which is, for example, 27 MBps
And parallel data. Also, the 2-bit additional data DAA (2) and the other 2-bit additional data DAB
Each of (2) is 2-bit word string data in which words of 2-bit configuration are consecutive, and the word transmission rate is:
For example, 27 MBps is selected.

In the signal multiplexing unit 11, the phases of the line period portions in the three-channel D1 signals DVA1 to DVA3 are aligned, and the three-channel D1 signals DVA1 to DVA3 and the 2-bit additional data DA, respectively.
Under the condition that bit synchronization with A (2) is achieved,
A multiplexing process is performed on a combination of the three-channel D1 signals DVA1 to DVA3 and the 2-bit additional data DAA (2), thereby performing the three-channel D1 signals DVA1 to DVA1.
16-bit word string data DU1 (16) based on a combination of VA3 and 2-bit additional data DAA (2) is obtained. In such a case, each word (10 bits) in each of the three-channel D1 signals DVA1 to DVA3 and the respective words (2 bits) in the 2-bit additional data DAA (2), which are simultaneously supplied to the signal multiplexing unit 11, are used. , A total of 10 × 3 + 2 = 32 bits are sequentially divided into 16 bits by 2 bits.
By being divided into words, the word transmission rate is reduced to 2
16-bit word string data DU1 (16) with 7 MBps × 32/16 = 54 MBps is formed. 16-bit word string data DU1 obtained from the signal multiplexing unit 11
(16) is supplied to the word string data processing unit 13.

In the signal multiplexing section 12, the phases of the line periods in the three D1 signals DVB1 to DVB3 are aligned, and the two bits of the D1 signals DVB1 to DVB3 are added to the two-bit additional data DAB. Under the condition that bit synchronization with (2) is achieved, the three-channel D1 signals DVB1 to DVB3 and DVB3 and
A multiplexing process is performed on the combination with the bit-added data DAB (2), whereby the three-channel D1 signal DVB1
16-bit word string data DU2 (16) based on a combination of .about.DVB3 and 2-bit additional data DAB (2) is obtained. In this case, each word (10 bits) in each of the three-channel D1 signals DVB1 to DVB3 and each word (2 bits) in the 2-bit additional data DAB (2), which are simultaneously supplied to the signal multiplexing unit 12, are used. , A total of 10 × 3 + 2 = 32 bits are sequentially converted into 16 bits by 2 bits.
By being divided into words, the word transmission rate is reduced to 2
16-bit word string data DU2 (16) having 7 MBps × 32/16 = 54 MBps is formed. 16-bit word string data DU2 obtained from the signal multiplexing unit 12
(16) is supplied to the 8B / 10B converter 14.

In the word string data processing section 13, 16-bit word string data D obtained from the signal multiplexing section 11
U1 (16) is supplied to the 8B / 10B converter 15. In the 8B / 10B conversion unit 15, first, the 16-bit word string data DU1 (1
6) is subjected to 8B / 10B conversion processing. Such 8B / 1
The 0B conversion processing is performed on 16-bit word string data DU1 (1
For 6), the 16 bits forming each word are divided into two bit groups of 8 bits each to perform 8-bit division, and each of the divided 8 bits is prepared in advance. The conversion is performed by sequentially converting the data into 10-bit data according to the conversion table.

Subsequently, the 8B / 10B conversion section 15 superimposes and derives two 10-bit word data sequentially obtained by the 8B / 10B conversion processing, and sets the word transmission rate to 54 MBps and a 20-bit word data. The word string data DM1 (20) is formed. Then, the formed 20-bit word string data DM1 (20) is supplied to the channel identification code (CH identification code) insertion unit 16. The CH identification code insertion unit 16 has a horizontal synchronization pulse signal for the 16-bit word string data DU1 (16), and therefore, the 20-bit word string data DM1 (20).
Are also supplied.

In the CH identification code insertion section 16, the 20-bit word string data DM1 (20) from the 8B / 10B conversion section 15 is supplied to the data selection / extraction section 17, and the data selection / extraction section 17 receives the CH The word transmission rate from the identification code data transmission unit 18 is 54 MBps
Is also supplied. The CH identification code data DCI is configured by a plurality of 20-bit word data formed including the selected specific code data.

In the CH identification code insertion section 16, the horizontal synchronizing pulse signal SH is supplied to the control signal forming section 19. The control signal forming section 19 forms a control signal CWS and a control signal CDS synchronized with the horizontal synchronizing pulse signal SH, and sends the control signal CWS to the CH identification code data sending section 1.
8 and a control signal CDS to the data selection / extraction unit 17.

The CH identification code data transmission section 18 transmits CH identification code data DCI having a word transmission rate of 54 MBps in response to the control signal CWS, and supplies it to the data selection / extraction section 17. When the control signal CDS is supplied, the data selecting / extracting section 17 extracts the CH identification code data DCI from the CH identification code data transmitting section 18 in response to the control signal CDS. Otherwise, the 8B / 10B conversion is performed. The 20-bit word string data DM1 (20) from the section 15 is taken out and data is selectively taken out. As a result, the data selection and extraction unit 17
For the bit word string data DM1 (20), in the line blanking period portion of the line period portion, the CH identification code data sending section 18 is provided in accordance with the control signal CDS.
Is performed to insert the CH identification code data DCI.

In the data selection / extraction section 17,
In a specific example of the process of inserting the CH identification code data DCI into the bit word string data DM1 (20), as shown in FIG.
A timing reference code, which has a two-word configuration in which two 20-bit word data are consecutively arranged and is arranged in a line blanking period portion of a line period portion in the 20-bit word string data DM1 (20) It is inserted so as to be arranged immediately before SAV which is data.
DHS following EAV, which is timing reference code data arranged in the line blanking period, is a horizontal synchronization data group.

Then, the 20-bit word string data DM1
The timing at which the CH identification code data DCI is inserted in (20) is set by the control signal CWS and the control signal CDS. As a result, the 20-bit word string data DM1 (20) in which the CH identification code data DCI is inserted in the line blanking period portion of the line period portion has a word transmission rate of 5
20 MB word string data DI1 (2
0).

Under such circumstances, the 8B / 10B converter 15
Is 8B / 16 bits in 16-bit word string data DU1 (16).
In performing the 10B conversion processing and obtaining the 20-bit word string data DM1 (20) based on the 10-bit word data sequentially obtained by the 8B / 10B conversion processing, the 20-bit word string data DM1 (20)
, The 20-bit word data to be positioned immediately before the portion where the CH identification code data DCI is inserted in the data selection / extraction section 17, and the 10-bit word data immediately before the CH identification code data DCI is connected , Whose RD is positive (+) or negative (-)
That is, RD data DRD indicating whether the immediately preceding RD to the CH identification code data DCI is positive (+) or negative (−) is transmitted, and the RD data DRD is inserted into the CH identification code. The data is supplied to the CH identification code data transmission section 18 in the section 16.

One specific example of the CH identification code data DCI transmitted from the CH identification code data transmission unit 18 and having a word transmission rate of 54 MBps is 8B /
10B code data, any neutral word data DXX. X (word data of 10-bit configuration)
20 bits formed by subjecting word multiplexing processing to word data having a 10-bit configuration called a code name of K28.0, which is specific code data selected from 8B / 10B code data, for example. Word data DXX. X: It has a two-word configuration in which two K28.0 are consecutively formed.

As shown in FIG. 3, word data having a 10-bit structure called by a code name of K28.0 is obtained when the CRD, which is the RD of the word data immediately preceding it, is negative (-). 001111010
0 ”, and when the CRD, which is the RD based on the immediately preceding word data, is positive (+),“ 11000 ”
01011 ".

Then, the CH identification code data transmitting section 18
From the two 20-bit word data DXX. X: K28.0
The word data having a 10-bit structure called by a code name of K28.0 in each of the above-mentioned is "00111101" when the RD data DRD from the 8B / 10B conversion unit 15 indicates that the immediately preceding RD is negative (-).
00 ”, and R from the 8B / 10B conversion unit 15
When the D data DRD indicates that the immediately preceding RD is positive (+), it is set to “1100001011”.

A word transmission rate of 54 MBps into which such CH identification code data DCI is inserted2
The portion of the 0-bit word string data DI1 (20) into which the CH identification code data DCI is inserted is as shown in FIG. In FIG. 4, DDA 20 is 20
It represents 20-bit word data constituting the bit word string data DM1 (20). Also, two 20-bit word data D forming the CH identification code data DCI
XX. X: SAV20 following K28.0 is 20-bit word data forming SAV which is timing reference code data among 20-bit word data constituting 20-bit word string data DM1 (20). The arrow t indicates the elapsed time (the same applies hereinafter).

In another specific example of the process of inserting the CH identification code data DCI into the 20-bit word string data DM1 (20) in the data selection / extraction section 17, as shown in FIG. DCI is 20
It has a two-word configuration in which two bit word data are formed in succession, and 20-bit word string data D
It is inserted as a replacement for a part of the SAV, which is the timing reference code data, arranged in the line blanking period portion of the line period portion in M1 (20).

Then, the 20-bit word string data DM1
The timing at which the CH identification code data DCI is inserted as a part of the SAV in (20) is set by the control signal CWS and the control signal CDS. As a result, the 20-bit word string data DM1 (20) in which the CH identification code data DCI is inserted as a part of the SAV in the line blanking period portion of the line period portion from the data selection / extraction section 17
Is derived as 20-bit word string data DI1 (20) having a word transmission rate of 54 MBps.

At this time, the CH identification code data transmitting section 1
One example of the CH identification code data DCI having a word transmission rate of 54 MBps transmitted from the above-mentioned 20-bit word data DXX. X: K2
8.0 has a two-word configuration formed by two consecutive words.

20-bit word string data DI1 (20) into which such CH identification code data DCI is inserted.
The part in which the CH identification code data DCI is inserted is as shown in FIG. In FIG.
DA20 is 20-bit word string data DM1 (20)
Are represented by 20-bit word data. Also,
CH identification code data DCI, two 20-bit word data DXX. X: SAV2 following K28.0
0 is 20-bit word data forming SAV which is timing reference code data among 20-bit word data constituting 20-bit word string data DM1 (20). In this case, 20-bit word string data D1
M1 (20), two of the SAVs 20 arranged in the line blanking period portion have two 20-bit word data DXX. X: Replaced by K28.0.

In another specific example of the process of inserting the CH identification code data DCI into the 20-bit word string data DM1 (20) in the data selection / extraction section 17, as shown in FIG. DCI is 20
It has an 8-word configuration in which eight bit word data are formed in series, and 20-bit word string data D
It is inserted so as to be arranged immediately before SAV, which is timing reference code data, arranged in the line blanking period portion of the line period portion in M1 (20).

Then, the 20-bit word string data DM1
The timing at which the CH identification code data DCI is inserted immediately before SAV in (20) is set by the control signal CWS and the control signal CDS. As a result, from the data selecting / extracting unit 17, the 20-bit word string data DM1 (20) in which the CH identification code data DCI is inserted immediately before the SAV in the line blanking period portion of the line period portion. ) Is derived as 20-bit word string data DI1 (20) having a word transmission rate of 54 MBps.

At this time, the CH identification code data transmitting section 1
One example of the CH identification code data DCI having a word transmission rate of 54 MBps, which is transmitted from the 8B / 10B code data, is any neutral word data DXX. X and specific code data selected from 8B / 10B code data.
K28.5 and 20-bit word data DXX. Formed by performing word multiplexing processing on 10-bit word data called code name. X: K28.5
, Any neutral word data DXX. X and 8
B / 10B code data, for example, D21.
3 is formed by performing word multiplexing processing on 10-bit word data called a code name of “3”.
0-bit word data DXX. X: A set of two words followed by D21.3 has an eight-word configuration formed by connecting four sets.

As shown in FIG. 8, the word data having a 10-bit structure called by the code name D21.3 has a value "CRD", which is the RD of the word data immediately preceding it, which is negative (-). 101010110
0 ”, and when the CRD, which is the RD of the immediately preceding word data, is positive (+),“ 10101
This is neutral word data, which is "00011".

Then, the CH identification code data transmission section 18
, 20-bit word data DXX. X:
K28.5 and 20-bit word data DXX. X: D2
CH identification code data DCI having an eight-word configuration in which four sets of two words that follow 1.3 are formed in a row.
Is the RD data DRD from the 8B / 10B conversion unit 15.
Indicates that the immediately preceding RD is negative (-),
“DXX.X: 00111111010, DXX.X: 1
010000111, DXX. X: 001111101
0, DXX. X: 1010100011, DXX. X:
0011111010, DXX. X: 10101000
11, DXX. X: 0011111010, DXX.
X: 1010100011 ", and the RD data DRD from the 8B / 10B conversion unit 15 is positive (+)
"DXX.X: 11000
00101, DXX. X: 1010101100, DX
X. X: 1100000101, DXX. X: 1010
101100, DXX. X: 1100000101, D
XX. X: 1010101100, DXX. X: 110
00000011, DXX. X: 1010101100 "
It is said.

The word transmission rate is set to 54 MBps in which such CH identification code data DCI is inserted.
The portion of the 0-bit word string data DI1 (20) into which the CH identification code data DCI is inserted is as shown in FIG. In FIG. 9, DDA 20 is 20
It represents 20-bit word data constituting the bit word string data DM1 (20). Further, a total of eight 20-bit word data DXX. X: K28.5 and DXX. X: D21.3
Following SAV20 is 20-bit word string data DM1
Of the 20-bit word data constituting (20),
2 for forming SAV which is timing reference code data
This is 0-bit word data.

In still another specific example of the process of inserting the CH identification code data DCI into the 20-bit word string data DM1 (20) in the data selection / extraction section 17,
As shown in FIG. 10, the CH identification code data DCI
Has an 8-word configuration in which eight 20-bit word data are formed in series, and is arranged in a line blanking period portion of a line period portion of the 20-bit word string data DM1 (20). It is inserted as a replacement for the SAV that is the reference code data.

Then, the 20-bit word string data DM1
The timing at which the CH identification code data DCI is inserted into (20) to replace the SAV is the control signal C.
It is set by WS and control signal CDS. As a result, the CH selection code data DCI is inserted from the data selection and extraction unit 17 into the line blanking period portion of the line period portion as a replacement for the SAV.
The 0-bit word string data DM1 (20) is derived as 20-bit word string data DI1 (20) having a word transmission rate of 54 MBps.

At this time, the CH identification code data transmitting section 1
One example of the CH identification code data DCI having a word transmission rate of 54 MBps transmitted from the above-mentioned 20-bit word data DXX. X: K2
8.5, the 20-bit word data DXX. X: D21.
A set of two words followed by three has an eight-word configuration formed by connecting four sets.

20-bit word string data DI1 (20) into which such CH identification code data DCI is inserted.
The part where the CH identification code data DCI is inserted is as shown in FIG. Also in FIG. 11, DDA 20 is a 20-bit word string data DM1.
Represents 20-bit word data that constitutes (20). In this case, the 20-bit word string data DM1 (2
0), a total of eight 20-bit word data DXX. Forming the CH identification code data DCI. X: K2
8.5 and DXX. X: has been replaced by D21.3.

The 20-bit word string data DI1 (20) including the CH identification code data DCI at a word transmission rate of 54 MBps and formed by the data selection / extraction unit 17 is supplied to the CH identification code insertion unit 16, P / S transmitted from the word string data processing unit 13
It is supplied to the conversion unit 20.

The P / S converter 20 performs a P / S conversion on the 20-bit word string data DI1 (20) to convert parallel data into serial data, based on the 20-bit word string data DI1 (20). , And obtains serial data DS1 having a bit transmission rate of 54 × 20 = 1.08 Gbps, and supplies the serial data DS1 to the bit multiplexing unit 21.

On the other hand, 16-bit word string data D having a word transmission rate from signal multiplexing section 12 of 54 MBps
In the 8B / 10B conversion unit 14 to which U2 (16) is supplied, first, the 16-bit word string data DU2 (16) from the signal multiplexing unit 12 is subjected to 8B / 10B conversion processing. In the 8B / 10B conversion process, the 16-bit word string data DU2 (16) is divided into 8-bit groups by dividing 16 bits forming each word into two 8-bit bit groups. Is performed by sequentially converting each of the divided 8 bits into 10-bit data according to a conversion table prepared in advance.

Subsequently, the 8B / 10B conversion section 14 superimposes and derives two 10-bit word data sequentially obtained by the 8B / 10B conversion processing, and obtains a 20-bit word having a word transmission rate of 54 MBps. The column data DM2 (20) is formed. Then, the formed 20-bit word string data DM 2 (20) is supplied to the P / S converter 22.

The P / S converter 22 performs a P / S conversion on the 20-bit word string data DM2 (20) to convert parallel data into serial data, based on the 20-bit word string data DM2 (20). , And obtains serial data DS2 having a bit transmission rate of 54 × 20 = 1.08 Gbps, and supplies the serial data DS2 to the bit multiplexing unit 21.

The frequency is set to 1.08 in the bit multiplexing section 21.
A clock pulse signal CK with x2 = 2.16 GHz is also supplied. Then, in the bit multiplexing unit 21, one bit is alternately sent from each of the serial data DS 1 from the P / S conversion unit 20 and the serial data DS 2 from the P / S conversion unit 22 according to the clock pulse signal CK. And performs bit multiplexing / combining processing on the serial data DS1 and the serial data DS2 to form one composite serial data DSM having a bit transmission rate of 2.16 Gbps. Thus, the composite serial data DSM obtained from the bit multiplexing unit 21 is supplied to the transmitting unit 23.

The transmitting section 23 is a composite serial data DSM
For example, in order to transmit through a data transmission line formed using a coaxial cable or an optical fiber, an electric signal suitable for a data transmission line formed using a coaxial cable, or an optical fiber is used. The transmission signal SM is converted into an optical signal suitable for the data transmission path formed and transmitted. Thus, transmission of the composite serial data DSM is performed.

The composite serial data DSM transmitted as a transmission signal SM from the transmission unit 23 in this manner is
The CH identification code data DCI includes a portion converted to serial data. Then, on the receiving side receiving the transmission signal SM, the CH identification code data DCI is converted into the CH identification code data D
CI is reproduced, and the reproduced CH identification code data DC
I is the 20-bit word string data DM1 (20) and D
M2 (20) contributes to the reliable reproduction of each, as a result,
D1 signals DVA1 to DVA1, which are a plurality of digital video signals
VA3 and each of DVB1 to DVB3 are properly reproduced.

In the example of the data transmission apparatus shown in FIG. 1 as described above, the transmission unit 23 converts the composite serial data DSM having a bit transmission rate of 2.16 Gbps into
The signal is converted into a transmission signal SM suitable for a data transmission path formed by using a coaxial cable or an optical fiber, and is transmitted. Therefore, such a transmission unit 23 can be configured by effectively utilizing a commercially available integrated circuit (IC) element, which is not specially developed. Therefore, based on the data to be transmitted, 8B /
Word string data subjected to 10B conversion processing is formed,
With a transmission system in which the word string data is converted into serial data and transmitted, a digital video signal, which is a plurality of D1 signals, can be reliably reproduced on the receiving side by using means capable of relatively easily preparing the digital video signal. Multiplexing and transmission.

Incidentally, in the example of the data transmission apparatus shown in FIG.
The 16-bit word string data DU1 (16) is subjected to 8B / 10B conversion processing by the 8B / 10B
The bit word string data DM1 (20) is obtained, and thereafter,
The CH identification code data DC for the 20-bit word string data DM1 (20) is output by the CH identification code insertion unit 16.
In contrast to this, the insertion processing of the CH identification code data is performed on the 16-bit word string data DU1 (16).
The 16-bit word string data DU1 (16) into which the H identification code data is inserted is subjected to 8B / 10B conversion processing to obtain 2 bits.
0-bit word string data may be obtained.

FIG. 12 shows an example of a data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application. Claim 1 in the claims of the present application
An example of a data transmission device according to the present invention is described below.

In the example shown in FIG. 12, a four-channel D1 signal DV which is a plurality of digital video signals
1, DV2, DV3, and DV4, one of which is supplied to the word string data processing unit 31 and the other D1 signals DV2 to DV2.
V4 is supplied to the 8B / 10B converters 32, 33 and 34, respectively. 4-channel D1 signal DV1
To DV4 are, for example, digital signals forming 10-bit word string data in the form of a data series as shown in FIG. You.

In the word string data processing section 31, 1
A D1 signal DV1 forming 0-bit word string data is:
It is supplied to the 8B / 10B converter 35. In the 8B / 10B converter 35, first, the D1 signal DV1 is added to the 8B / 10B signal.
Perform 10B conversion processing. Such an 8B / 10B conversion process uses a D1 signal DV that forms 10-bit word string data.
1 is divided into 8 bits at a time, and each of the divided 8 bits is divided according to a conversion table prepared in advance.
This is performed by sequentially converting the data into 10-bit data.

Subsequently, the 8B / 10B converter 35 sets the word transmission rate to 27 × 10/8 = 33.75 MBps based on the 10-bit word data sequentially obtained by the 8B / 10B conversion processing. The 10-bit word string data DX1 (10) is formed. And
The formed 10-bit word string data DX1 (10)
Is supplied to the CH identification code insertion unit 36. The CH identification code insertion unit 36 has a horizontal synchronizing pulse signal for the D1 signal DV1, that is, the 10-bit word string data DX.
The horizontal synchronization pulse signal SH for 1 (10) is also supplied.

Then, in the CH identification code insertion unit 36, the 10-bit word string data DX1 (10) from the 8B / 10B conversion unit 35 is supplied to the data selection / extraction unit 37, and the data selection / extraction unit 37 outputs The word transmission rate from the identification code data sending unit 38 is set to 33.75M.
CH identification code data DCI for Bps is also supplied. The CH identification code data DCI is composed of a plurality of consecutive 10-bit word data formed including the selected specific code data.

In the CH identification code insertion section 36, the horizontal synchronizing pulse signal SH is supplied to the control signal forming section 39. The control signal forming section 39 forms a control signal CWS and a control signal CDS synchronized with the horizontal synchronizing pulse signal SH, and outputs the control signal CWS to the CH identification code data transmitting section 3.
8 and a control signal CDS to the data selection / extraction unit 37.

The CH identification code data sending section 38 adjusts the word transmission rate to 33.75 MB according to the control signal CWS.
It sends out the CH identification code data DCI as ps and supplies it to the data selection / extraction section 37. When the control signal CDS is supplied to the data selection / extraction section 37, the CH identification code data transmission section 38 responds accordingly.
, And at other times, 10-bit word string data DX1 (10) from the 8B / 10B converter 35 is extracted, and data is selectively extracted. Thereby, the data selection and extraction unit 37
For the 10-bit word string data DX1 (10), in the line blanking period portion of the line period portion,
According to the control signal CDS, a process of inserting the CH identification code data DCI from the CH identification code data sending unit 38 is performed.

In the data selection / extraction section 37,
In a specific example of the process of inserting the CH identification code data DCI into the bit word string data DX1 (10), as shown in FIG.
Is a two-word configuration in which two 10-bit word data are consecutively arranged, and is arranged in a line blanking period portion of a line period portion of the 10-bit word string data DX1 (10). It is inserted so as to be arranged immediately before SAV which is reference code data.

Then, 10-bit word string data DX1
The timing at which the CH identification code data DCI is inserted in (10) is set by the control signal CWS and the control signal CDS. As a result, the 10-bit word string data DX1 (10) in which the CH identification code data DCI is inserted in the line blanking period portion of the line period portion has a word transmission rate of 3
10-bit word string data DI at 3.75 MBps
1 (10).

Under such circumstances, the 8B / 10B conversion unit 35
Is a D1 signal DV forming 10-bit word string data.
1 is subjected to an 8B / 10B conversion process,
10-bit word string data DX1 (1) based on 10-bit word data sequentially obtained by the B conversion process
0), the 10-bit word string data D
In X1 (10), the 10-bit word data located immediately before the portion where the CH identification code data DCI is inserted in the data selection / extraction section 37, and thus immediately before the CH identification code data DCI is connected, has its RD set to RD. Whether it is positive (+) or negative (-), that is, C
RD immediately before H identification code data DCI is positive (+)
RD data DR indicating whether the data is negative or negative (-)
D, and supplies the RD data DRD to the CH identification code data transmission unit 38 in the CH identification code insertion unit 36.

One example of the CH identification code data DCI transmitted from the CH identification code data transmission section 38 and having a word transmission rate of 33.75 MBps is as follows.
It has a two-word configuration in which, for example, two 10-bit word data, which are specific code data selected from the 8B / 10B code data and called by a code name of K28.0, are formed in series. .

The CH identification code data transmitting section 38
The two pieces of 10-bit word data referred to by the code name K28.0 that form the CH identification code data DCI transmitted from the RD data DRD from the 8B / 10B conversion unit 35 have a negative RD (−). ) Is “10111110100”, and when the RD represented by the RD data DRD from the 8B / 10B conversion unit 35 is positive (+), it is “1100”.
001011 ".

In the 10-bit word string data DI1 (10) having the word transmission rate of 33.75 MBps into which the CH identification code data DCI is inserted, the portion where the CH identification code data DCI is inserted is shown in FIG. 1
4. In FIG. 14, DD10
Represents 10-bit word data constituting the 10-bit word string data DX1 (10). SAV10 following 10-bit word data having a code name of K28.0 and forming two pieces of CH identification code data DCI is 10-bit word string data DX1.
Of the 10-bit word data constituting (10),
1 for forming SAV which is timing reference code data
This is 0-bit word data.

FIG. 15 shows another specific example of the process of inserting the CH identification code data DCI into the 10-bit word string data DX1 (10) in the data selection / extraction section 37.
As shown in (1), the CH identification code data DCI is 1
A timing reference code having a two-word configuration in which two pieces of 0-bit word data are formed and arranged in a line blanking period portion of a line period portion in 10-bit word string data DX1 (10). It is inserted as a part of the SAV that is data.

Then, 10-bit word string data DX1
The timing at which the CH identification code data DCI is inserted as a part of the SAV in (10) is set by the control signal CWS and the control signal CDS. As a result, from the data selecting / extracting section 37, the 10-bit word string data DX1 (10) in which the CH identification code data DCI is inserted as a part of the SAV in the line blanking period portion of the line period portion
Set the word transmission rate to 33.75 MBps10
It is derived as bit word string data DI1 (10).

At this time, the CH identification code data transmitting section 3
33.75MB word transmission rate sent from 8
One specific example of the CH identification code data DCI to be ps has a two-word structure in which two 10-bit word data called by the code name K28.0 are formed in a row. .

The 10-bit word string data DI1 (10) into which such CH identification code data DCI is inserted.
The portion where the CH identification code data DCI is inserted is as shown in FIG. Also in FIG. 16, DD10 is 10-bit word string data DX1 (1
0) representing 10-bit word data. Also, two K2s forming the CH identification code data DCI
SAV10 following 10-bit word data called a code name of 8.0 is SAV which is timing reference code data of 10-bit word data constituting 10-bit word string data DX1 (10).
Is formed, and in this case,
Two of the SAVs 10 arranged in the line blanking period in the 10-bit word string data DX1 (10) form the CH identification code data DCI.
This is replaced by 10-bit word data called by a code name of K28.0.

FIG. 17 shows another specific example of the process of inserting the CH identification code data DCI into the 10-bit word string data DX1 (10) in the data selection / extraction section 37.
As shown in (1), the CH identification code data DCI is 1
A timing reference code which has an 8-word configuration in which eight 0-bit word data are formed in a row and is arranged in a line blanking period portion of a line period portion in the 10-bit word string data DX1 (10) It is inserted so as to be arranged immediately before SAV which is data.

Then, 10-bit word string data DX1
The timing at which the CH identification code data DCI is inserted immediately before SAV in (10) is set by the control signal CWS and the control signal CDS. As a result, from the data selection / extraction section 37, the 10-bit word string data DX1 (10 ) Is derived as 10-bit word string data DI1 (10) having a word transmission rate of 33.75 MBps.

At this time, the CH identification code data transmitting section 3
33.75MB word transmission rate sent from 8
One specific example of the CH identification code data DCI to be ps is 10-bit word data called a code name of K28.5, which is specific code data selected from 8B / 10B code data. 8
B / 10B code data, for example, D21.
A two-word set consisting of 10-bit word data successively referred to by a code name of "3" has an eight-word structure formed of four consecutive sets.

Then, the CH identification code data transmitting section 38
A set of two 2-word words consisting of 10-bit word data called by code name K28.5 and 10-bit word data called by code name D21.3, which is sent from, is formed. 8
The CH identification code data DCI having a word configuration is 8B
The RD data DRD from the / 10B conversion unit 35 is
When indicating that D is negative (-), "00111"
11010,1010100011,00111110
10,1010100011,00111111010,
1010100011, 0011111010, 101
01000111 ", and the 8B / 10B conversion unit 3
When the RD data DRD from No. 5 indicates that the immediately preceding RD is positive (+), “1100000101, 10
10101100, 1100000101, 10101
01100,1100000101,10101011
00,1100000101,1010101100 "
It is said.

The 10-bit word string data DI1 (10) having the word transmission rate of 33.75 MBps into which the CH identification code data DCI is inserted has a portion where the CH identification code data DCI is inserted. 1
8. In FIG. 18, DD10
Represents 10-bit word data constituting the 10-bit word string data DX1 (10). The SAV 10 following the 10-bit word data called the code name of K28.5 or D21.3 forming a total of eight pieces of CH identification code data DCI constitutes 10-bit word string data DX1 (10). Of the bit word data, it is 10-bit word data that forms SAV that is timing reference code data.

In still another specific example of the process of inserting the CH identification code data DCI into the 10-bit word string data DX1 (10) in the data selection / extraction section 37,
As shown in FIG. 19, the CH identification code data DCI
Has a five-word structure in which five 10-bit word data are formed in series, and is arranged in a line blanking period part of a line period part in the 10-bit word string data DX1 (10). It is inserted as a replacement for the SAV that is the reference code data.

Then, 10-bit word string data DX1
The timing at which the CH identification code data DCI is inserted in (10) to replace the SAV is the control signal C.
It is set by WS and control signal CDS. Accordingly, the CH identification code data DCI is inserted from the data selection and extraction unit 37 into the line blanking period portion of the line period portion as a replacement for the SAV.
The 0-bit word string data DX1 (10) is derived as 10-bit word string data DI1 (10) having a word transmission rate of 33.75 MBps.

At this time, the CH identification code data transmitting section 3
33.75MB word transmission rate sent from 8
One of the specific examples of the CH identification code data DCI to be set to ps is called by a code name of K28.5.
It has a 5-word structure in which word data of a 0-bit structure and word data of a 10-bit structure called by a code name of D21.3 are alternately formed. Such CH identification code data DCI is 8B / 1
When the RD data DRD from the 0B conversion unit 35 indicates that the immediately preceding RD is negative (−), “0011111”
010, 1010100011, 001111101
0, 1010100011, 00111111010 ", and when the RD data DRD from the 8B / 10B conversion unit 35 indicates that the immediately preceding RD is positive (+)," 1100000101, 1010101100,
1100000011,1010101100,110
0000101 ".

10-bit word string data DI1 (10) into which such CH identification code data DCI is inserted.
In FIG. 20, the portion where the CH identification code data DCI is inserted is as shown in FIG. Also in FIG. 20, DD10 is 10-bit word string data DX1 (1
0) representing 10-bit word data. In this case, the SAV arranged in the line blanking period portion of the 10-bit word string data DX1 (10)
Is composed of a total of five K2
This means that the data is replaced by word data of a 10-bit configuration called by a code name of 8.5 or D21.3.

A word transmission rate of 33.75 MBps formed in the data selection / extraction section 37
The 10-bit word string data DI1 (10) including the H identification code data DCI is input to the CH identification code insertion unit 36,
Further, sent from the word string data processing unit 31,
It is supplied to the speed converter 40. In the speed conversion unit 40, the 10-bit word string data DI1 (10) including the CH identification code data DCI is subjected to a speed conversion process of converting the word transmission rate from 33.75 MBps to 53.125 MBps. . Such a speed conversion process includes:
For example, 10-bit word string data DI1 (10)
This is performed by sequentially writing data into the memory means at predetermined intervals at a write speed corresponding to the word transmission rate, and sequentially reading data from the memory means at predetermined read speeds at a read speed different from the write speed.

From the speed conversion unit 40, 10-bit word string data DI1 (10) whose word transmission rate has been converted from 33.75 MBps to 53.125 MBps is converted to 10-bit word string data having a word transmission rate of 53.125 MBps. DI′1 (10), which is supplied to the P / S converter 41. P / S converter 41
, 10-bit word string data DI′1 (1
0), P for converting parallel data into serial data
/ S conversion to perform 10-bit word string data DI'1
The bit transmission rate based on (10) is 53.125 ×
10 = 531.25 Mbps serial data DS
1 and the serial data DS1 is added to the bit multiplexing unit 42
To supply.

On the other hand, D1 signals DV2 to DV4 each forming 10-bit word string data are supplied to 8B.
In the / 10B conversion units 32 to 34, first, the D1 signals DV2 to DV4 are subjected to 8B / 10B conversion processing. In the 8B / 10B conversion process, each of the D1 signals DV2 to DV4, each forming 10-bit word string data, is divided into 8 bits, and each of the divided 8 bits is prepared in advance. According to the conversion table,
This is performed by sequentially converting the data into 10-bit data.

Subsequently, in the 8B / 10B conversion units 32 to 34, based on the 10-bit word data sequentially obtained by the 8B / 10B conversion processing in each of them,
10-bit word string data DX2 (10), DX3 (10), and DX4 (10), each having a word transmission rate of 33.75 MBps, are formed. And the formed 1
0-bit word string data DX2 (10) to DX4 (1
0) is supplied to the speed converters 43, 44 and 45, respectively.

In the speed converters 43 to 45,
10-bit word string data DX2 (10) to DX4 (1
0), a speed conversion process for converting the word transmission rate from 33.75 MBps to 53.125 MBps is performed. In such a speed conversion process, for example, each of the 10-bit word string data DX2 (10) to DX4 (10)
This is performed by sequentially writing data into the memory means at predetermined intervals at a write speed corresponding to the word transmission rate, and sequentially reading data from the memory means at predetermined read speeds at a read speed different from the write speed.

From the rate converters 43 to 45, the word transmission rate is from 33.75 MBps to 53.125 MBps.
-Converted 10-bit word string data DX2 (10)
DX4 (10) increases the word transmission rate to 53.125.
10-bit word string data DX′2 (1
0) to DX'4 (10), which are supplied to the P / S converters 46, 47 and 48, respectively. P
The / S converters 46 to 48 respectively convert the 10-bit word string data DX′2 (10) to DX′4 (10) into
P / S conversion for converting parallel data into serial data is performed, and 10-bit word string data DX'2 (10)
The bit transmission rate is 5 based on DX'4 (10).
The serial data DS2, DS3, and DS4 having 3.125 × 10 = 531.25 Mbps are obtained, and the serial data DS2 to DS4 are supplied to the bit multiplexing unit 42.

In the bit multiplexing section 42, the frequency is set to 531.
A clock pulse signal CK of 25 × 4 = 2.125 GHz is also supplied. Then, in the bit multiplexing unit 41, the P / S conversion unit 4 responds to the clock pulse signal CK.
1 and serial data DS1 to DS4 from 46 to 48
The operation of sequentially taking out one bit address from each of these is repeated to perform bit multiplexing / combining processing on the serial data DS1 to DS4 to form one composite serial data DSM having a bit transmission rate of 2.125 Gbps. Thus, the composite serial data DSM obtained from the bit multiplexing unit 42 is supplied to the transmitting unit 49.

The transmitting section 49 is provided with the composite serial data DSM
For example, in order to transmit through a data transmission line formed using a coaxial cable or an optical fiber, an electric signal suitable for a data transmission line formed using a coaxial cable, or an optical fiber is used. The transmission signal SM is converted into an optical signal suitable for the data transmission path formed and transmitted. Thus, transmission of the composite serial data DSM is performed.

The composite serial data DSM transmitted as the transmission signal SM from the transmission section 49 in this manner is:
The CH identification code data DCI includes a portion converted to serial data. Then, on the receiving side receiving the transmission signal SM, the CH identification code data DCI is converted into the CH identification code data D
CI is reproduced, and the reproduced CH identification code data DC
I contributes to the reliable reproduction of each of the 10-bit word string data DI'1 (10) and DX'2 (10) to DX'4 (10), and as a result, four digital video signals D1 Each of the signals DV1 to DV4 is properly reproduced.

In the example of the data transmission apparatus shown in FIG. 12 as described above, transmitting section 49 transmits composite serial data DSM having a bit transmission rate of 2.125 Gbps.
Is a transmission signal S suitable for a data transmission line formed using a coaxial cable or an optical fiber.
The data is converted to M and transmitted. Therefore, such a transmission unit 49 can be configured by effectively using a commercially available integrated circuit (IC) element, which is not specially developed. Therefore, based on the data to be transmitted, 8
A digital video signal, which is composed of a plurality of D1 signals, can be relatively easily converted by a transmission method in which word string data subjected to the B / 10B conversion processing is formed, and the word string data is converted into serial data and transmitted. By using means that can be arranged, multiplexing and transmission can be performed so that the data can be reliably reproduced on the receiving side.

FIG. 21 shows another specific configuration example of a portion including the word string data processing section 31, the speed conversion section 40 and the P / S conversion section 41 in the example shown in FIG.
In the specific configuration example shown in FIG.
0 is fetched into the word string data processing unit 31, and 8B
It is arranged between the / 10B conversion unit 35 and the data selection / extraction unit 37 in the CH identification code insertion unit 36.

Accordingly, in the case of the specific configuration example shown in FIG. 21, the 10-bit word string data DX1 (10) obtained from the 8B / 10B conversion unit 35 and having a word transmission rate of 33.75 MBps has the speed The conversion unit 40 changes the word transmission rate from 33.75 MBps to 53.75 MBps.
A rate conversion process for converting the word transmission rate to 125 MBps is performed.
10-bit word string data DX′1 (1
0) is obtained. Then, the 10-bit word string data DX'1 (10) with the word transmission rate of 53.125 MBps from the speed conversion unit 40 is added to the CH identification code data transmission unit by the data selection and extraction unit 37 in the CH identification code insertion unit 36. A process for inserting the CH identification code data DCI transmitted from the data transmission / reception unit 38 is performed.
ps and 1 in which the CH identification code data DCI is inserted.
0-bit word string data DZ1 (10) is derived.
At this time, the CH identification code data DCI sent from the CH identification code data sending unit 38 has a word transmission rate of 53.125 MBps.

Then, the channel identification code data DCI obtained from the data selection / extraction section 37 is
The bit word string data DZ1 (10) is supplied to the P / S converter 41, and the P / S converter 41 outputs the serial data D with a bit transmission rate of 531.25 Mbps.
S1 is obtained.

FIG. 22 is a block diagram showing a transmitter 23 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 eighth aspects of the present invention. 1 shows an example of a data receiving apparatus that receives a transmission signal SM based on composite serial data DSM transmitted from the Internet.

In the example of the data receiving apparatus shown in FIG. 22, for example, an electric signal suitable for a data transmission path formed by using a coaxial cable or an optical fiber formed by using an optical fiber is used. And a receiving unit 60 for receiving a transmission signal SM which is an optical signal suitable for the data transmission path. The receiving unit 60 transmits the transmission signal SM
, The composite serial data DSM having a bit transmission rate of 2.16 Gbps based on the received transmission signal SM is reproduced and supplied to the bit separation unit 61.

The receiving section 60 detects the clock of the reproduced composite serial data DSM, reproduces a clock pulse signal CK having a frequency of 2.16 GHz from the composite serial data DSM, and outputs the clock pulse signal CK. Is supplied to the bit separation unit 61.

The bit separation unit 61 uses the clock pulse signal CK having a frequency of 2.16 GHz to convert the composite serial data DSM from the reception unit 60 into one.
The bit addresses are sequentially taken out and an operation of forming every other two bit groups is performed.
A bit separation process is performed on the SM. Thereby, in the bit separation unit 61, each of the bit transmission rates is set to 2.16.
/2=1.08 Gbps and two serial data D
SA and DSB are formed, and the serial data DSA is
The serial data DSB is supplied to the S / P converter 63 while being supplied to the / P converter 62.

The S / P converter 62 performs S / P conversion on the serial data DSA to convert the serial data into parallel data, and converts the serial data DSA into 20-bit word string data. Thereby, the S / P conversion unit 62 sets the word transmission rate to 1,080 / 20 = 54 MBps based on the serial data DSA.
0-bit word string data DZA (20) is obtained.

The S / P converter 63 performs S / P conversion on the serial data DSB to convert the serial data DSB into 20-bit word string data. As a result, the serial data DSB
, The word transmission rate is 1,080 / 20 = 54
20 bits word string data DZB (2
0) is obtained.

The 20-bit word string data DZA (20) from the S / P converter 62 and the 2
The 0-bit word string data DZB (20) is supplied to the data restoration unit 64. In the data restoration unit 64, 2
The 0-bit word string data DZA (20) is supplied to both the bus switch 65 and the CH identification code detection / timing control unit 66.
B (20) is supplied to the bus switch 65.

CH identification code detection / timing control unit 6
6, the C for the 20-bit word string data DZA (20) having a word transmission rate of 54 MBps
H identification code data detection is performed to determine whether or not the 20-bit word string data DZA (20) includes the CH identification code data DCI. Such a determination is, for example,
The CH identification code data DCI is the same as FIG.
1, the 20-bit word string data DZA (20) as shown in FIG.
20-bit word data -DDA where RD is negative (-)
20, based on the CH identification code data DCI, as shown in FIG.
I containing a 20-bit word DXX.
X: detection signal Sd having a high level corresponding to K28.5
Is obtained, or R in the 20-bit word string data DZA (20) as shown in FIG.
20-bit word data + DDA2 where D is positive (+)
0 based on the CH identification code data DCI following FIG.
3D, the CH identification code data DCI
20-bit word DXX.
X: detection signal Sd having a high level corresponding to K28.5
Is obtained depending on whether or not is obtained.

As a result, 20-bit word string data DZ
If the channel identification code data DCI is included in A (20) and the channel identification code data DCI is detected, the timing control signal S supplied to the bus switch 65 is output.
S, for example, does not cause the bus switch 65 to switch, and the bus switch 65 transmits the 20-bit word string data DZA (20) from the S / P converter 62 to a 20-bit word having a word transmission rate of 54 MBps. Derived as column data DM1 (20) and S / P
20-bit word string data DZB (2
0) is maintained as a 20-bit word string data DM2 (20) having a word transmission rate of 54 MBps. Thereby, each of the reproduced 20-bit word string data DM1 (20) and DM2 (20) is properly obtained from the bus switch 65.

In the CH identification code detection / timing control unit 66, the 20-bit word string data DZA
As a result of the CH identification code data detection for (20),
If the CH identification code data DCI is not included in the 20-bit word string data DZA (20) and the CH identification code data DCI is not detected, the timing control signal SS supplied to the bus switch The 20-bit word string data DZB (20) from the S / P converter 63 is transmitted to the bus switch 65 at a word transmission rate of 54 MBp.
s, and the 20-bit word string data DZA (20) from the S / P converter 62 is converted to the 20-bit word string data DM2 with a word transmission rate of 54 MBps.
The state derived as (20) is taken. Thereby,
From the bus switch 65, each of the reproduced 20-bit word string data DM1 (20) and DM2 (20) is properly obtained.

The reproduced 20-bit word string data DM1 (20) and DM2 obtained from the bus switch 65
(20) is transmitted from the data restoring unit 64, and 10B /
8B conversion / 16-bit word string data forming units 67 and 6
8 respectively.

The 10B / 8B conversion and 16-bit word string data forming section 67 first performs a 10B / 8B conversion process on the 20-bit word string data DM1 (20). In the 10B / 8B conversion process, the 20-bit word string data DM1 (20) is divided into 10-bit groups by dividing 20 bits forming each word into two 10-bit bit groups. Is performed by sequentially converting each of the divided 10 bits into 8-bit data according to a conversion table prepared in advance.

Subsequently, the 10B / 8B conversion and 16-bit word string data forming section 67 superimposes and derives the word data of the 8-bit configuration sequentially obtained by the 10B / 8B conversion processing two by two, and obtains the word transmission rate. 54MB
16-bit word string data DU1 (16)
To form Then, the formed 16-bit word string data DU1 (16) is supplied to the signal separating section 69.

The 10B / 8B conversion and 16-bit word string data forming section 68 first performs a 10B / 8B conversion process on the 20-bit word string data DM2 (20). In the 10B / 8B conversion process, the 20-bit word string data DM2 (20) is divided into 10-bit groups by dividing 20 bits forming each word into two bit groups each having 10 bits. Is performed by sequentially converting each of the divided 10 bits into 8-bit data according to a conversion table prepared in advance.

Subsequently, the 10B / 8B conversion / 16-bit word string data forming section 68 superimposes and derives the word data of the 8-bit configuration sequentially obtained by the 10B / 8B conversion processing two by two, and obtains the word transmission rate. 54MB
16-bit word string data DU2 (16), where ps
To form Then, the formed 16-bit word string data DU2 (16) is supplied to the signal separation unit 70.

In signal separation section 69, 16-bit word string data D having a word transmission rate of 54 MBps
A state in which 32 bits forming two consecutive words of U1 (16) are divided into three groups of 10 bits and two bits, and the divided three groups of 10 bits and two bits are individually derived. To be continued. as a result,
Based on 16-bit word string data DU1 (16), three-channel parallel data each forming 10-bit word string data having a word transmission rate of 54/2 = 27 MBps, and a word transmission rate of 54/2 = 27M
The 3-channel D1 signals DVA1 to DVA3 and 2-bit additional data DAA (2), which are 2-bit word string data of Bps, are formed separately from each other.
Thereby, the reproduced three-channel D1 signals DVA1 to DVA3 and the 2-bit additional data DAA (2) are derived from the signal separating unit 69.

The signal separating section 70 forms two consecutive words of 16-bit word string data DU2 (16) having a word transmission rate of 54 MBps 32.
The bits are divided into three groups of 10 bits and two bits, and a state in which the divided three groups of 10 bits and two bits are individually derived is continued. As a result, based on the 16-bit word string data DU2 (16), each sets the word transmission rate to 54/2 = 27 MBps.
And three-channel parallel data forming 10-bit word string data, and a word transmission rate of 54/2 =
2-bit word string data of 27 MBps
Three-channel D1 signals DVB1 to DVB3 and 2-bit additional data DAB (2) are formed separately from each other. As a result, the reproduced 3
The channel D1 signals DVB1 to DVB3 and 2-bit additional data DAB (2) are derived.

In the above-described example of the receiving apparatus shown in FIG. 22, when receiving transmission signal SM transmitted from transmitting section 23 in the data transmitting apparatus shown in FIG. 20 from the S / P converter 62
When the bit word string data DZA (20) and the 20-bit word string data DZB (20) from the S / P converter 63 are supplied, the operation is controlled by a built-in operation control unit formed using a microcomputer, for example. , FIG. 2
The control operation represented by the flowchart shown in FIG. 4 is performed.

In the control operation represented by the flowchart shown in FIG. 24, after the start, in step 71, the count value Cv of the counter is reset to 0, and in the subsequent step 72, the S / P conversion unit 62 CH identification code data is detected for the 20-bit word string data DZA (20), and it is determined whether or not the CH identification code data DCI has been detected. As a result, 2
When the CH identification code data DCI is detected in the 0-bit word string data DZA (20), it is determined in a step 73 whether or not the count value Cv of the counter is 0.

If the result of determination in step 73 is that the count value Cv of the counter is 0, the flow returns to step 72, and
If the count value Cv of the counter is not 0, step 7
In step 4, the count value Cv of the counter is reduced by 1, and the process returns to step 72.

Also, as a result of the determination in step 72, 20
If the CH identification code data DCI is not detected in the bit word string data DZA (20), the count value Cv of the counter is increased by 1 in step 75, and the count value Cv of the counter is incremented in step 76.
Is determined to have reached a predetermined set value N. As a result, if the count value Cv of the counter has not reached the set value N, the process returns to step 72, and the count value Cv of the counter is returned.
Has reached the set value N, in step 77,
Switching is caused in the bus switch 65 by the timing control signal SS, and thereafter, the process returns to step 71.

FIG. 25 is shown in FIG. 12 according to an example of the data transmission method according to any one of the first to sixth, ninth and tenth aspects of the present invention. 1 shows an example of a data receiving apparatus for receiving a transmission signal SM based on composite serial data DSM, which is transmitted from a transmitting unit 49 in a data transmitting apparatus.

In the example of the data receiving apparatus shown in FIG. 25, for example, an electric signal suitable for a data transmission path formed by using a coaxial cable or an optical fiber formed by using an optical fiber is used. A receiving unit 80 is provided for receiving a transmission signal SM which is an optical signal suitable for the data transmission path. The receiving unit 80 transmits the transmission signal SM
, The composite serial data DSM having a bit transmission rate of 2.125 Gbps based on the received transmission signal SM is reproduced, and supplied to the bit separation unit 81.

The receiving section 80 detects a clock for the reproduced composite serial data DSM, reproduces a clock pulse signal CK having a frequency of 2.125 GHz from the serial data DSM, and outputs the clock pulse signal CK. It is supplied to the bit separation unit 81.

The bit separation unit 81 uses the clock pulse signal CK having a frequency of 2.125 GHz to convert the composite serial data DSM from the reception unit 80 into one.
An operation of sequentially taking out the bits and forming four groups of every third bit is performed, and the composite serial data DS
A bit separation process is performed on M. As a result, in the bit separation unit 81, the bit transmission rate is set to 2,125
/4=531.25 Mbps to form four serial data DSA, DSB, DSC and DSD, and these serial data DSA to DSD are converted by the S / P converter 8
2, 83, 84 and 85 respectively.

The S / P converters 82 to 85 perform S / P conversion on the serial data DSA to DSD, respectively, to convert each of the serial data DSA to DSD into 10-bit word string data. Thereby, the serial data DSA to DSD are output from the S / P converters 82 to 85, respectively.
The word transmission rate is 531.25 / 10 = 5 based on
10-bit word string data D with 3.125 MBps
ZA (10), DZB (10), DZC (10) and D
ZD (10) is obtained.

The 10-bit word string data DZA (10) to DZD (10) from the S / P converters 82 to 85 are supplied to speed converters 90, 91, 92 and 93, respectively. In the speed conversion units 90 to 93, the 10-bit word string data DZA (10) to DZD (10)
Word transmission rate from 53.125 MBps to 33.7
A 10-bit word string data DZ'A (10), DZ'B (10), DZ'C which is subjected to a speed conversion process for converting to 5 MBps and setting the word transmission rate to 33.75 MBps.
(10) and DZ'D (10) are derived.

The 10-bit word string data DZ'A (10) to DZ'D (10) where the word transmission rates obtained from the speed converters 90 to 93 are 33.75 MBps, respectively.
Is supplied to the data restoration unit 94. Data restoration unit 94
, The 10-bit word string data DZ'A (1
0) to DZ'D (10) are bus switches 96 and C
It is supplied to both the H identification code detection / timing control unit 97.

CH identification code detection / timing control section 9
7, the word transmission rate is 33.75 Mbps
10-bit word string data DZ'A (10) to D
CH identification code data for Z'D (10) is detected, and 10-bit word string data DZ'A (10) to DZ'A (10) to D
The one that includes the CH identification code data DCI among Z′D (10) is determined. Such discrimination is, for example, C
When the H identification code data DCI is as shown in FIG. 18, the RD in the 10-bit word string data DZ'A (10) as shown in FIG. Based on the CH identification code data DCI following the bit word data-DD10, as shown in FIG. 26B, + K in the CH identification code data DCI
Whether the detection signal Sd having a high level corresponding to 28.5 is obtained, or 1 as shown in FIG.
Based on the CH identification code data DCI following the 10-bit word data + DD10 in which the RD is positive (+) in the 0-bit word string data DZ'A (10), D in FIG.
As shown in the figure, + in the CH identification code data DCI
The determination is made based on whether or not a detection signal Sd having a high level corresponding to K28.5 is obtained.

In the CH identification code detection / timing control section 97, the 10-bit word string data D
Timing control signal S corresponding to the result of CH identification code data detection for Z'A (10) to DZ'D (10)
S is formed and supplied to the bus switch 96 to control the bus switch 96. At this time, the timing control signal SS supplied from the CH identification code detection / timing control unit 97 to the bus switch 96
10-bit word string data DZ'A (10) to DZ'D
Of (10), the one containing the CH identification code data DCI is derived as 10-bit word string data DX1 (10) having a word transmission rate of 33.75 MBps, and the other ones are sequentially extracted from each other. Are set to be derived as 10-bit word string data DX2 (10) to DX4 (10) with a word transmission rate of 33.75 MBps. As a result, each of the reproduced 10-bit word string data DX1 (10) to DX4 (10) is properly obtained from the bus switch 96.

Reproduced 10-bit word string data DX1 (10) to DX4 obtained from bus switch 96
(10) is transmitted from the data restoring unit 94 and 10B /
8B conversion / 10-bit word string data forming section 98, 9
9, 100 and 101 respectively.

In the 10B / 8B conversion / 10-bit word string data forming section 98, first, the 10-bit word string data DX1 (10) is subjected to 10B / 8B conversion processing. In such 10B / 8B conversion processing, the 10-bit word string data DX1 (10) is divided into 10 bits forming each word, and each of the divided 10 bits is converted into a conversion table prepared in advance. By sequentially converting the data into 8-bit data.

Subsequently, in the 10B / 8B conversion / 10-bit word string data forming section 98, the word transmission rate is set to 33.75 based on the 8-bit word data sequentially obtained by the 10B / 8B conversion processing. × 8/10 =
It forms 10-bit word string data of 27 MBps and sends it out as a D1 signal DV1.

In the 10B / 8B conversion / 10-bit word string data forming section 99, first, the 10-bit word string data DX2 (10) is subjected to 10B / 8B conversion processing. In the 10B / 8B conversion process, the 10-bit word string data DX2 (10) is divided into 10 bits forming each word, and each of the divided 10 bits is converted into a conversion table prepared in advance. By sequentially converting the data into 8-bit data.

Subsequently, in the 10B / 8B conversion / 10-bit word string data forming section 99, the word transmission rate is set to 33.75 based on the word data of the 8-bit configuration sequentially obtained by the 10B / 8B conversion processing. × 8/10 =
It forms 10-bit word string data of 27 MBps and sends it out as a D1 signal DV2.

In the 10B / 8B conversion and 10-bit word string data forming unit 100, first, the 10-bit word string data DX3 (10) is subjected to 10B / 8B conversion processing. In the 10B / 8B conversion process, the 10-bit word string data DX3 (10) is divided into 10 bits forming each word, and each of the divided 10 bits is converted into a conversion table prepared in advance. By sequentially converting the data into 8-bit data.

Subsequently, in the 10B / 8B conversion and 10-bit word string data forming section 100, the word transmission rate is set to 33.75 based on the 8-bit word data sequentially obtained by the 10B / 8B conversion processing. × 8/10
= 27 MBps, and forms 10-bit word string data, which is transmitted as a D1 signal DV3.

Further, in the 10B / 8B conversion and 10-bit word string data forming section 101, first, the 10-bit word string data DX4 (10) is subjected to 10B / 8B conversion processing. In the 10B / 8B conversion process, the 10-bit word string data DX4 (10) is divided into 10 bits forming each word, and the divided 1
This is performed by sequentially converting each of the 0 bits into 8-bit data according to a conversion table prepared in advance.

Subsequently, in the 10B / 8B conversion / 10-bit word string data forming section 101, the word transmission rate is set to 33.75 based on the 8-bit word data sequentially obtained by the 10B / 8B conversion processing. × 8/10
= 27 MBps to form 10-bit word string data, which is transmitted as a D1 signal DV4.

In this way, 10B / 8B conversion · 10
From the bit word string data forming units 98 to 101,
The reproduced D1 signals DV1 to DV4 are properly obtained.

[0151]

As is apparent from the above description, in the data transmission method according to any one of the first to tenth aspects of the present invention, each of the methods includes, for example, , D1 signal, D2 signal, SDTI signal, HD signal, or other digital video signal, or D1 signal, D2 signal,
Regarding a plurality of word string data to be formed by a digital video signal such as an SDTI signal or an HD signal, at least one of the word string data includes 8B / 1
Both the 0B conversion process and the identification code data insertion process are performed, and at least one other than the 8B / 1
Under the condition that the 0B conversion process has been performed, the P / S conversion process is performed on each of them, and further, a plurality of serial data obtained thereby are subjected to a bit multiplexing synthesis process to form composite serial data. Since the composite serial data is transmitted to be transmitted, the transmitted composite serial data includes a portion obtained by converting the identification code data inserted in at least one of the plurality of word string data into serial data. Will be included.

Therefore, on the receiving side receiving the transmitted composite serial data, the composite serial data received as including the part where the identification code data is converted into the serial data is subjected to bit separation processing and S / P conversion. In any one of the plurality of word string data obtained by performing the processing, the identification code data can be detected, and according to the detected identification code data,
A plurality of word string data can be properly reproduced and derived. Further, by performing both 10B / 8B conversion processing and signal separation processing or 10B / 8B conversion processing on each of the plurality of word string data reproduced and derived,
A plurality of digital video signals can be reproduced.

That is, according to the data transmission method according to any one of the first to tenth aspects of the present invention, the 8B / 10B conversion is performed based on the data to be transmitted. The processed word string data is formed, and the word string data is converted into serial data and transmitted, for example, into a plurality of D1 signals, D2 signals, SDTI signals, HD signals, or the like. A plurality of digital video signals can be multiplexed and transmitted so that they can be reliably reproduced on the receiving side by means that can prepare the digital video signals relatively easily.

Further, in the data transmission apparatus according to the invention described in claim 11 or claim 12 in the claims of the present application as described above, each of the data transmission apparatuses is, for example, D
1 signal, D2 signal, SDTI signal, HD signal, or other digital video signal, or D1 signal, D2 signal, SDTI signal, or H
For a plurality of word string data to be formed by a digital video signal such as a D signal, the word string data processing means assigns at least one of them to
The 8B / 10B conversion processing and the identification code data insertion processing are performed, and the 8B / 10B conversion means performs the 8B / 10B conversion processing on at least one of them except for at least one of them. Then, the P / S conversion means has performed the word string data subjected to the 8B / 10B conversion processing obtained from the word string data processing means and the identification code data insertion processing, and the 8B / 10 data obtained from the 8B / 10B conversion means.
Each of the word string data subjected to the B-conversion processing is converted into serial data, and furthermore, P bit
A plurality of serial data obtained from the / S conversion means are bit-multiplexed and combined with the composite serial data, and the composite serial data is transmitted by the transmission means.

Therefore, the transmitted composite serial data includes a portion where the identification code data inserted in at least one of the plurality of word string data is converted into serial data. Therefore, the receiving side that receives the transmitted composite serial data performs bit separation processing and S / P conversion processing on the composite serial data received as including the part where the identification code data has been converted to serial data. Thus, the identification code data can be detected in any of the plurality of word string data, and the plurality of word string data can be appropriately reproduced and derived according to the detected identification code data. it can. Further, by performing both the 10B / 8B conversion processing and the signal separation processing or the 10B / 8B conversion processing on each of the plurality of reproduced and derived word string data, a plurality of digital video signals can be reproduced.

That is, according to the data transmission apparatus of the invention described in claim 11 or claim 12 of the present application, based on the data to be transmitted,
A word string data subjected to 8B / 10B conversion processing is formed, and the word string data is converted into serial data and transmitted according to a transmission method, for example, a plurality of D1 signals, D2 signals, SDTI signals or HD signals. Thus, a plurality of digital video signals can be multiplexed and transmitted so that they can be reliably reproduced on the receiving side by means that can prepare the digital video signals relatively easily.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a data transmission method according to the present invention; FIG. 1 is a block diagram showing an embodiment of a data transmission method according to the present invention; FIG. 13 is a block diagram showing an example of a data transmission device according to the invention described in claim 12.

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

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

FIG. 4 is a time chart for explaining an example of a data transmission method according to the invention described in any one of claims 1 to 8 in the claims of the present application.

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

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

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

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

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

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

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

FIG. 12 is a diagram illustrating an example of a data transmission method according to an embodiment of the present invention. FIG. 14 is a block diagram showing an example of a data transmission device according to the invention described in claim 11 or claim 12 in the claims.

FIG. 13 is a time chart for explaining an example of a data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application; It is.

FIG. 14 is a time chart for explaining an example of the data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application; It is.

FIG. 15 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 6, 9 and 10 in the claims of the present application; It is.

FIG. 16 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 6, 9 and 10 in the claims of the present application; It is.

FIG. 17 is a time chart for explaining an example of the data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application; It is.

FIG. 18 is a time chart for explaining an example of the data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application; It is.

FIG. 19 is a time chart for explaining an example of the data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application; It is.

FIG. 20 is a time chart for explaining an example of the data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application; It is.

21 is a block diagram illustrating another specific configuration example of a portion in the example of the data transmission apparatus illustrated in FIG. 12;

FIG. 22 shows an example of a data receiving apparatus for receiving a transmission signal transmitted according to an example of the data transmission method according to any one of claims 1 to 8 in the claims of the present application. It is a block block diagram.

FIG. 23 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 22;

24 is a flowchart provided for describing the operation of a data restoration unit in the data receiving device shown in FIG. 22.

FIG. 25: Receives a transmission signal transmitted according to an example of the data transmission method according to any one of claims 1 to 6, 9 and 10 in the claims of the present application. FIG. 2 is a block diagram showing an example of a data receiving device that performs the processing.

FIG. 26 is a time chart for explaining an example of the data receiving apparatus shown in FIG. 25;

FIG. 27 is a conceptual diagram serving to explain data used for transmitting digital data.

FIG. 28 is a conceptual diagram explaining an example of a data format of a digital video signal.

[Explanation of symbols]

11, 12 ... signal multiplexing unit, 13, 31 ... word string data processing unit, 14, 15, 32, 33, 34, 3
5 ... 8B / 10B converter, 16, 36 ... CH
ID code insertion part, 17, 37 ... data selection and extraction part, 18, 38 ... CH identification code data transmission part,
19, 39 ... control signal forming unit, 20, 22, 4
1, 46, 47, 48... P / S converter, 21, 4
2 ... bit multiplexing unit, 23, 49 ... transmitting unit,
40, 43, 44, 45 ... speed conversion unit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 11/08 11/24 F term (reference) 5C057 AA03 BA04 BA11 CB04 CB08 CE10 EA06 EB02 EL01 GF08 GH05 GL00 GL01 5C063 AA01 AA11 AB03 AB07 AB09 AC01 AC05 CA14 CA23 5K028 AA14 EE03 MM08 SS06 5K029 AA01 GG03 HH21

Claims (12)

[Claims] 1. each based on a digital video signal,
Alternatively, for a plurality of word string data to be formed by the digital video signal, at least one of the plurality of word string data is subjected to an 8-bit / 10-bit conversion process and an identification code data insertion process. Performing an 8-bit / 10-bit conversion process on data other than the at least one of the plurality of word string data, and performing either the 8-bit / 10-bit conversion process and the identification code data insertion process or the 8-bit / 10-bit conversion process. A parallel / serial conversion process is performed on each of the plurality of word string data that has been subjected to the 10-bit conversion process to form a plurality of serial data. A data transmission method for forming data and sending the composite serial data for transmission. 2. The method according to claim 1, wherein the identification code data is inserted into at least one of the plurality of word string data or at least one of the plurality of word string data by 8 bits / byte.
2. The data transmission method according to claim 1, wherein the transmission is performed by inserting predetermined code data that has been subjected to 10-bit conversion processing. 3. The method according to claim 1, wherein the identification code data is inserted into at least one of the plurality of word string data or at least one of the plurality of word string data.
2. The data transmission method according to claim 1, wherein the data transmission is performed for each line cycle in the data that has been subjected to the 10-bit conversion processing. 4. The method according to claim 1, wherein the identification code data is inserted into at least one of the plurality of word string data or at least one of the plurality of word string data.
2. The data transmission method according to claim 1, wherein the data transmission method is performed by inserting predetermined specific code data into a line blanking period portion of the data subjected to the 10-bit conversion processing. 5. An identification code data inserting process, wherein at least one of a plurality of word string data, or at least one of the plurality of word string data, includes 8 bits / byte.
5. The data transmission method according to claim 4, wherein the predetermined code data is inserted immediately before the timing reference code data in the line blanking period portion of the data subjected to the 10-bit conversion processing. . 6. An identification code data inserting process, wherein at least one of a plurality of word string data or at least one of the plurality of word string data is performed by adding 8 bits / byte to at least one of the plurality of word string data.
5. The data transmission method according to claim 4, wherein the data transmission method is performed by replacing timing reference code data in a line blanking period portion of the data subjected to the 10-bit conversion processing with specific code data selected in advance. 7. A method in which each of a plurality of word string data is obtained by multiplexing a plurality of digital video signals or a combination of a plurality of digital video signals and a bit addition signal. The data transmission method according to claim 1, wherein 8. The data transmission method according to claim 7, wherein the plurality of word string data are two 20-bit word string data. 9. The data transmission method according to claim 1, wherein the plurality of word string data are four 10-bit word string data respectively formed by four digital video signals. 10. A method according to claim 8, wherein the plurality of word string data subjected to the 8-bit / 10-bit conversion processing and the identification code data insertion processing or the 8-bit / 10-bit conversion processing are subjected to speed conversion before performing the parallel / serial conversion processing. The data transmission method according to claim 9, wherein a conversion process is performed. 11. A plurality of word string data each based on a digital video signal or formed by a digital video signal, wherein at least one of the plurality of word string data includes 8 bits. Word string data processing means for performing a / 10-bit conversion process and an identification code data insertion process; and performing an 8-bit / 10-bit conversion process on at least one of the plurality of word string data other than the at least one.
Bit / 10-bit conversion means, 8-bit / 10-bit conversion processing and identification code data insertion processing by the word string data processing means, or
8 bits / 1 by the 8 bits / 10 bits conversion means
A parallel / serial conversion process is performed on each of the plurality of word string data that has been subjected to the 0-bit conversion process,
Parallel / serial conversion means for forming a plurality of serial data; bit multiplexing means for subjecting the plurality of serial data to bit multiplexing / combining processing to form composite serial data; transmission for transmitting the composite serial data for transmission Means for transmitting data. 12. The word string data processing means performs an identification code data inserting process on at least one of a plurality of word string data or at least one of the plurality of word string data by 8 bits / 10. 12. The data transmission apparatus according to claim 11, wherein the data transmission is performed by inserting predetermined code data selected in advance into a bit-converted one.