JP2002330431A - Data transmission method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently conduct 2-way transmission of data of a 720P signal in number of quantization bits, 10 bits or more or data resulting from attaching a Key signal data sequence to the 720P signal to minimize number of optical signal cables. SOLUTION: The data of the 720P signal in number of quantization bits, 10 bits or more or data resulting from attaching the Key signal data sequence to the 720P signal are converted into an optical signal, the converted signal is transmitted to an optical signal transmission cable 31 through a 2-way WDM coupler 19 from the one terminal of the cable 31, return data from a signal recording and reproducing section 11 are converted into an optical signal, transmitted from the other terminal of the cable 31 through a 2-way WDM coupler 32, then the optical signal is conducted in 2-way transmission through the cable 31 between the camera section 10 and the signal recording and reproducing section 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention described in the claims of the present application has a feature that the number of effective lines in each frame is 72.
A plurality of serial data based on a plurality of digital data corresponding to a digital video signal or the like in which 0 lines are set and the number of effective data samples in each line is set to 1280 samples is obtained. The present invention relates to a data transmission method for bidirectionally transmitting a plurality of optical signals obtained by performing an optical signal transmission between two transmission / reception units through an optical signal transmission cable, and a data transmission apparatus provided for the implementation.

[0002]

2. Description of the Related Art In the field of video signals, transmission information
From the viewpoint of realizing diversification and high quality of reproduced images, etc.
Digitalization has been attempted, for example, video signal information
Digit formed by digital data
High-definition television (High Definiti)
on Television: HDTV)
You. Digital video under HDTV system
Signals (hereinafter referred to as HD digital video signals)
BTA (Broadcasting Technology Association:
Formed according to the standards established by the Transport Technology Development Council
And Y, P_B/ P _RFormat and G, B, R formats
There is no. Y, P_B/ P_RFor format, Y is the luminance signal
Means P_BAnd P_RMeans a color difference signal. Also,
In the case of the G, B, and R formats, G, B, and R are each a green primary color signal.
, A blue primary color signal and a red primary color signal.

[0003] Y, HD digital picture signal of P _B / P _R format, frame rate 30Hz or 30/1.
001 Hz (in this application, any of these is 30H
called z. ), Each frame image is a signal for interlaced scanning that is formed by being divided into a first field image and a second field image, and follows a data format as shown in FIG. 31, for example. You. The data format shown in FIG. 31 includes a luminance signal data sequence (Y data sequence) representing luminance signal information in a video signal as shown in FIG.
1B, a color difference signal data sequence (P _B / P _R data sequence) representing color difference signal information in the video signal. Each of the Y data sequence and the P _B / P _R data sequence is a quantum The number of coded bits is 10 bits, so that each of the word data forming it has a 10-bit configuration, and the word transmission rate is, for example, 7 bits.
4.25 MBps. And in FIG. 31A,
Y is shown a portion of the video data unit in the line blanking section and the front and rear thereof in each line portion of the data series, also in the B of FIG. 31, in each line unit in the P _B / P _R data sequence The line blanking part and a part of the video data part before and after it are shown.

In the Y data sequence, immediately before each video data portion, four words (3 words each having a 10-bit configuration) are used.
FF (Y), 000 (Y), 000 (Y), XYZ
(Y); 3FF, 000 and XYZ are represented in hexadecimal, and (Y) represents a word in the Y data series. ) Timing reference code data (SA
V: Start of Active Video), and four words (3FF (Y), 000 (Y), 000) each having a 10-bit configuration immediately after each video data part.
(Y), XYZ (Y)), and timing reference code data (EAV: End of Active Video).
Similarly, P _B / P be in the _R data series, just before each image data unit, four words, each of which is a 10-bit configuration (3FF (C), 000 ( C), 000 (C), X
YZ (C); 3FF, 000 and XYZ are hexadecimal, indicating that the (C) the word in P _B / P _R data sequence. ) Consisting of four words (3FF) each having a 10-bit structure immediately after each video data portion.
(C), 000 (C), 000 (C), XYZ (C))
The timing reference code data is composed of EAV. Of course, Y data sequence in the timing reference code data: EAV and SAV Each of the, Y data is arranged in each line blanking section in the sequence, also, P _B / P _R data sequence in the timing reference code data: EAV and SAV each is arranged in each line blanking section of the P _B / P _R data sequence.

Here, four words (3FF, 000,000,000,000, XYZ) indicated with (Y) or (C) are added.
, The first three words (3FF, 000,000,000,000
0) is for establishing word synchronization or line synchronization, and the last one word (XYZ) is used for discriminating between the first field and the second field in the same frame, or a timing reference code. Data: SAV and timing reference code data: for discriminating between EAV (the same applies hereinafter).

The G, B, and R format HD digital video signals are also signals for interlaced scanning at a frame rate of 30 Hz, and follow a data format as shown in FIG. 32, for example. You. FIG.
The data format shown in FIG. 2 includes a green primary color signal data sequence (G data sequence) representing green primary color signal information in a video signal as shown in FIG.
32, a blue primary color signal data sequence (B data sequence) representing blue primary color signal information in the video signal, and a red color representing red primary color signal information in the video signal, as shown in FIG. 32C. And a primary color signal data sequence (R data sequence). Each of the G data sequence, B data sequence, and R data sequence has a quantization bit number of 10
Each of the word data forming the bits has a 10-bit configuration, and the word transmission rate is, for example, 74.25 MBps. A, B, and C in FIG. 32 respectively show a G data series,
A line blanking part in each line part in the B data series and the R data series and a part of a video data part before and after the line blanking part are shown.

In each of the G data sequence, B data sequence, and R data sequence, immediately before each video data portion, four words (3FF (G), 0FF) each having a 10-bit configuration are used.
00 (G), 000 (G) and XYZ (G) ((G) represents a word in the G data series), 3
FF (B), 000 (B), 000 (B) and XYZ
(B) ((B) indicates a word in the B data series) or 3FF (R), 000
(R), 000 (R) and XYZ (R) ((R) represents a word in the R data series.)), Timing reference code data: SAV is provided, and each video data section is provided. Immediately after, four words (3FF (G), 000 (G), 00) each having a 10-bit configuration
0 (G) and XYZ (G), 3FF (B), 000
(B) 000 (B) and XYZ (B), or 3
FF (R), 000 (R), 000 (R) and XYZ
(R)) timing reference code data: EAV
Is arranged. Of course, G data series, B data series and R data series
Each of the timing reference code data: EAV and SAV in each of the data sequences is allocated to each line blanking section in each of the G, B and R data sequences.

[0008] In the current HDTV system, Y the frame rate as described above is as for interlaced scanning at Moto which is a 30Hz, P _B / P _R format or G,
HD digital video signals of B and R formats are used, but as a next-generation HDTV system,
Frame rate 60Hz or 60 / 1.001H
z (in the present application, each of these is referred to as 60 Hz), each frame image is divided into the first and second frames.
Are sequentially with scanning is formed without being divided into fields, Y, P _B / P _R format or G, B, a system using a HD digital video signal of R format has been proposed. Are sequentially with scanning, Y, P _B / P _R format or G, B, HD digital video signal of the R form, referred to as HD digital video signal of progressive (Progressive) scheme.

A program with a frame rate of 60 Hz
Digit forming a low-resolution HD digital video signal
Data is from SMPTE (Society of Motion Pi
cture and Television Engineers: Film and Television Engineers
Standards established by the Association of Engineers: SMPTE 247M
Standardization of the format is being attempted. Such SMPTE
 In the format standardized by 247M,
Frame rate: 60Hz plus effective data per line
Number of samples: 1920 samples, per frame
Effective lines: 1080 lines, sampling frequency: 1
48.5 MHz or 148.5 / 1.001 MHz
(In the present application, any of these is 148.5 MHz
That. ), Number of quantization bits: 8 bits or 10 bits
And so on. And the parallel data
Interface is Y, P_B/ P _R8-bit format
X 2 = 16 bits or 10 bits x 2 = 20 bits
8 bits × 3 = 24 for G, B, and R formats
Bits or 10 bits × 3 = 30 bits.

In digital data forming such a digital video signal having a quantization bit number of 8 bits or 10 bits, a code that is not used to represent video signal information is determined as a prohibition code. I have. For example, when the quantization bit number is 8 bits,
The prohibition codes are represented in hexadecimal notation 00h and FFh (subscript h
Is a hexadecimal number), that is, 0000 0000
When the number of quantization bits is 10 bits, the prohibition code is 000h in hexadecimal notation.
００003h and 3FCh〜3FFh, ie, 00 0000 0
000-00 00000011 and 11 1111 1100-11 1111 11
11

[0011] Incidentally, Y, if the P _B / P _R format, P _B data sequence and P _R data sequence of each of the sampling frequency is 1/2 of the sampling frequency of the Y data sequence. Is put below, if necessary, Y, and P _B / P _R format 4: 2: represented as 2 format. In the case of the G, B, and R formats, the sampling frequencies of the G data sequence, the B data sequence, and the R data sequence are the same. In the following, the G, B, and R formats are referred to as 4: 4: 4 formats as necessary.

Apart from the HD digital video signal as described above, the frame rate is set to 60 Hz, the number of effective lines in each frame is set to 720 lines, and the number of effective data samples in each line is set to 1280 samples. A progressive digital video signal (in the present application, such a digital video signal
0P signal) has been proposed. 720 like this
The digital data forming the P signal has been standardized in format according to a standard established by SMPTE: SMPTE 296M. In the format standardized by such SMPTE 296M, the frame rate: 60H
z, number of effective lines per frame: 720 lines, number of effective data samples per line: 1280 samples, as well as the number of lines in each frame: 750 lines, sampling frequency: 74.25 MHz or 7
4.25 / 1.001 MHz (all of them are referred to as 74.25 MHz in the present application), the number of quantization bits: 8 bits or 10 bits, and the like. And the parallel data interface is Y,
For P _B / P _R format, 8 bits × a 2 = 16 bits or 10 bits × 2 = 20 bits, G, B, when the R form, 8 bits × 3 = 24 bits or 10 bits × 3 = 30 Is a bit.

The 720P signal has been proposed in the transition period to the HD digital video signal in the field of the digital video signal. Is 1080 lines and 1920 samples, but is 720 lines and 1280 samples, which is ＨＤ of the case of the HD digital video signal. Although it is inferior to a signal, it has a frame rate of 60 Hz, and is therefore suitable for use as a signal representing a fast-moving image.

For the digital data forming the 720P signal, for example, in order to further improve the resolution of an image reproduced based on the digital data, the number of quantization bits is changed to 8 bits or 10 bits. For example, it has been desired to use 12 bits, 14 bits, 16 bits, and the like. However, in the current standard for digital data forming a 720P signal such as the above-mentioned SMPTE 296M, the standardization of a quantization bit number of 8 bits or 10 bits is attempted. The number of bits exceeding 8 bits or 10 bits, for example, 12 bits, 14 bits, 16 bits, etc., is not standardized.

[0015] In addition, digital data forming a 720P signal with a quantization bit number of, for example, 12, 14, or 16 bits has a problem associated with its transmission. That is, in transmitting digital data forming a 720P signal, serial transmission which is converted into serial data and transmitted is desired. Under the present circumstances, the number of quantization bits is set to 8 bits or 10 bits. For digital data forming an HD digital signal of 4: 2: 2 format, an HD SDI (High Defini
Transmission using the Serial Serial Interface) is standardized, but other types of digital data, for example, a 720P signal having a quantization bit number of 10 bits or exceeding 10 bits The serial transmission of digital data that satisfies the following is not standardized.

In connection with a video signal to be digitized as described above, a key signal (Key Signal) used when the video signal is combined with another video signal has been proposed. The Key signal is the opacity or transparency of the relevant video signal.
Signal that represents “SMPTE RECOMMENDED PRACTI
Recommended as CE ”RP 157-1995.

A Key signal related to a 4: 2: 2 digital video signal has a Key signal data sequence, which is digital data forming the same, equivalent to the Y data sequence included in the digital data forming the digital video signal. It has a data format and is handled in the same way as the Y data series. The Key signal relating to the 4: 4: 4 format digital video signal has a Key signal data sequence, which is digital data constituting the Key signal data, equivalent to a G data sequence included in the digital data constituting the digital video signal. It has a format and is handled in the same way as a G data series.

Then, 4: 2: 2 format or 4: 4:
In transmitting digital data forming a 720P signal in four formats, it is often required to transmit digital data forming the 720P signal and a key signal data sequence related thereto. In such a case,
In addition to the digital data forming the 720P signal in 4: 2: 2 format or 4: 4: 4 format, the associated Ke
The y signal data sequence is transmitted as an additional information data sequence attached to the digital data forming the 720P signal to be transmitted, and furthermore, such transmission is performed, for example, with a quantization bit number of 10 bits. It is desired to use existing circuit components used for serial transmission of digital data forming a digital video signal so as to perform the transmission from the viewpoints of ease of implementation, reduction of cost, and the like.

The digital data forming the 720P signal or the digital data forming the 720P signal and the key signal data sequence are obtained, for example, from a video camera which performs an imaging operation to form a 720P signal, and records the data and records the data as necessary. To be supplied to a signal recording / reproducing unit provided with a video tape recorder (VTR) for reproducing.

[0020] Image pickup by a video camera and formation of a 720P signal, and 7
When recording and reproducing a 20P signal, for example, when recording of broadcast program information is performed by a television broadcast station or the like, a plurality of video cameras are generally used,
A camera unit is constituted by a plurality of video cameras. Then, the digital data forming the 720P signal or the digital data forming the 720P signal and the Key signal data sequence obtained from each of the plurality of video cameras forming the camera section are sent to the signal recording / reproducing section.

When an image is taken by a plurality of video cameras in the camera section, it is necessary for a person who operates each of the video cameras (a cameraman) to know the situation of taking an image with another video camera. A reproduced image based on a 720P signal obtained from another video camera is obtained on an image monitor provided in each video camera. Therefore, the digital data forming the 720P signal or the digital data forming the 720P signal and the Key signal data sequence obtained from each video camera and sent to the signal recording / reproducing section are subjected to predetermined processing in the signal recording / reproducing section. The signal is supplied from the signal recording / reproducing unit to a camera unit including a plurality of video cameras.

As described above, the digital data forming the 720P signal or the digital data forming the 720P signal and the Key signal data sequence supplied to the camera section including a plurality of video cameras are provided in each video camera in the camera section. Since it is used for reproducing an image on the image monitor provided, it is not required that a reproduced image based on the image is extremely high in quality. Therefore, the digital data forming the 720P signal or the digital data forming the 720P signal and the key signal data sequence are, for example, digital data forming the 720P signal or 72 bits obtained from another video camera.
The transmission capacity is limited because the digital data and the Key signal data series forming the 0P signal are subjected to a compression process or the like, thereby facilitating transmission. Below,
For example, digital data forming a 720P signal or digital data forming a 720P signal and a Key signal data sequence obtained by performing a compression process or the like are referred to as return data.

As described above, between the camera unit and the signal recording / reproducing unit, the digital data forming the 720P signal, the digital data forming the 720P signal, and the Key obtained from each of the plurality of video cameras in the camera unit.
The signal data sequence is transmitted to, for example, a signal recording / reproducing unit equipped with a VTR, and return data subjected to a predetermined process is transmitted from the signal recording / reproducing unit to the camera unit. Between the department and 720
Bidirectional transmission of digital data forming the P signal or digital data forming the 720P signal and a key signal data sequence and return data is performed. The return data is, for example, plural.

The digital data forming the 720P signal or the digital data forming the 720P signal and K obtained from each of a plurality of video cameras forming the camera section.
In transmitting bidirectionally the ey signal data sequence and the return data between the camera unit and the signal recording / reproducing unit, digital data or 72
Each of the digital data and the Key signal data sequence forming the 0P signal and the return data is serial data,
Furthermore, it is conceivable to convert them into optical signals and transmit them through an optical signal transmission cable which has a large transmission signal capacity and provides excellent transmission efficiency. In this case, a so-called optical fiber is used as an optical signal transmission cable for connecting the camera unit and the signal recording / reproducing unit.

The optical fiber forming such an optical signal transmission cable is, for example, a quartz single mode fiber (silica SMF). This quartz SMF is
For example, the core diameter is 10 μm, and the clad diameter is 125 μm.
m has one propagation mode, and has a feature that the transmission frequency band is wide and the propagation loss can be suppressed low. Therefore, it is suitable for use in high-speed, long-distance communication using optical signals, and is suitable for transmitting optical signals based on digital video signals obtained from a video camera.

The quartz-based SMF causes, for example, attenuation of an optical signal according to the attenuation characteristic shown in FIG.
Causes dispersion of the optical signal according to the dispersion characteristic shown in FIG. The dispersion of an optical signal refers to the spread of the frequency spectrum of the optical signal and the spread of the propagation time or waveform distortion of the optical signal caused by the material and structure of the optical fiber. In the attenuation characteristic shown in FIG. 33, the attenuation characteristic shows a minimum value for light having a wavelength of approximately 1.3 μm and light having a wavelength of approximately 1.55 μm. In the dispersion characteristics shown in FIG. 34, the dispersion of light having a wavelength of about 1.3 μm is minimized.

[0027]

As described above, digital data forming a 720P signal or digital data forming a 720P signal and a key signal data sequence obtained from each of a plurality of video cameras forming a camera section. And the return data are converted into optical signals as serial data, and when the two-way transmission is performed between the camera unit and the signal recording / reproducing unit using an optical signal transmission cable, the camera unit and the signal recording / reproducing unit are used. In between, a plurality of optical signals are provided for bidirectional transmission. Therefore, according to the conventional data transmission method, 7
Digital data forming a 20P signal or 720
Regarding the serial transmission of the digital data forming the P signal and the key signal data series, the digital data forming the 720P signal or the digital data forming the 720P signal and the key signal data series must be divided into a plurality of signal channels and transmitted. Therefore, it is necessary to arrange a large number of optical signal transmission cables in parallel between the camera unit and the signal recording / reproducing unit, which requires a large space for cable installation. At the same time, the cost increases.

Therefore, the digital data forming the 720P signal or the digital data forming the 720P signal, the Key signal data sequence, and the return data obtained from each of the plurality of video cameras forming the camera section are converted. Data transmission that enables efficient transmission of two or more obtained optical signals between a camera unit and a signal recording / reproducing unit using an optical signal transmission cable to minimize the number of optical signal transmission cables. Although a system is desired, such a data transmission system has not hitherto been found.

In view of such a point, the invention described in the claims of the present application uses, for example, an optical signal transmission cable to convert a plurality of optical signals based on a plurality of serial data into, for example, one or two optical signals. 720P can be transmitted bidirectionally using one optical signal transmission cable, and therefore, for example, the number of quantization bits obtained from each of a plurality of video cameras constituting a camera unit is 10 bits or more.
A plurality of optical signals obtained by converting each of the digital data forming the signal or the digital data forming the 720P signal and the key signal data series and the return data between the camera unit and the signal recording / reproducing unit. When applied to bidirectional transmission using an optical signal transmission cable, a data transmission method that can perform the bidirectional transmission efficiently to minimize the number of optical signal transmission cables, and A data transmission device is provided for implementing such a method.

[0030]

A data transmission method according to any one of the first to eighth aspects of the present invention provides digital data or 720P signals forming 720P signals. First and second word string data based on digital data to be formed and parallel data forming an additional information data sequence are obtained, and first and second word string data based on the first and second word string data, respectively.
And performing bit multiplexing / synthesis processing on the first and second serial data to form composite serial data, converting the composite serial data into a first optical signal having a first center wavelength, A first bidirectional wavelength-division multiplexing coupler having first and second input / output terminals at one end and a third input / output terminal at the other end. To the first input / output terminal at
A first optical signal led out to a third input / output end of the bidirectional wavelength multiplexing coupler is sent to an optical signal transmission cable and transmitted from one end to the other end, and a third serial The data is converted into a second optical signal having a second central wavelength different from the first central wavelength, and the second optical signal is provided with fourth and fifth input / output terminals at one end. And a sixth input / output end provided on the other end side.
The second optical signal supplied to the fourth input / output end of the bidirectional wavelength division multiplexing coupler and output to the sixth input / output end of the second bidirectional wavelength division multiplexing coupler is transmitted to the optical signal transmission cable. The first optical signal transmitted from the other end to the one end and transmitted to the other end of the optical signal transmission cable is transmitted to the second end.
Out to the fifth input / output end of the bidirectional wavelength division multiplexing coupler, and transmits the second optical signal transmitted to one end of the optical signal transmission cable to the second input / output end of the first bidirectional wavelength division multiplexing coupler. It is assumed to be derived to the input / output terminal.

In the data transmission method according to any one of the ninth to sixteenth aspects of the present invention, a digital data forming a 720P signal or a digital data forming a 720P signal is provided. Obtaining first and second word string data based on the parallel data forming the data and additional information data sequence; obtaining first and second serial data based on the first and second word string data, respectively; The serial data is converted to a first optical signal having a first center wavelength, and the first optical signal is converted to a first optical signal having first and second input / output terminals on one end and a second optical signal on the other end. A first input / output terminal provided with a third input / output terminal;
A first optical signal supplied to a first input / output terminal of the bidirectional wavelength-division multiplexing coupler and guided to a third input / output terminal of the first bidirectional wavelength-division multiplexing coupler. It is transmitted to a transmission cable and transmitted from one end to the other end, and the second serial data is converted into a second optical signal having a second center wavelength, and the second optical signal is Fourth and fifth input / output terminals are provided on one end side, and a sixth input / output terminal is provided on the other end side. Supply,
A second optical signal led out to a sixth input / output end of the second bidirectional wavelength multiplexing coupler is sent to a second optical signal transmission cable and transmitted from one end to the other end; The third serial data is converted into a third optical signal having a third central wavelength different from the first central wavelength, and the third optical signal is supplied to one end of the third optical signal at the seventh and eighth input sides. An output terminal is provided and a ninth input / output terminal is provided on the other end side.
A third optical signal supplied to a seventh input / output end of the bidirectional wavelength division multiplexing coupler and output to a ninth input / output end of the third bidirectional wavelength division multiplexing coupler. While transmitting to the transmission cable and transmitting from the other end to one end, the fourth serial data is converted into a fourth optical signal having a fourth center wavelength different from the second center wavelength,
A fourth bidirectional wavelength division multiplexing coupler having tenth and eleventh input / output terminals at one end and twelfth input / output terminals at the other end is provided to the fourth optical signal. A fourth optical signal supplied to the tenth input / output terminal of the second bidirectional wavelength-division multiplexing coupler and led out to the twelfth input / output terminal of the fourth bidirectional wavelength multiplexing coupler. The first optical signal transmitted from one end to one end and transmitted to the other end of the first optical signal transmission cable is led to an eighth input / output end of a third bidirectional wavelength division multiplexing coupler. Along with
A third optical signal transmitted to one end of the first optical signal transmission cable is led out to a second input / output end of the first bidirectional wavelength division multiplexing coupler, and the other optical signal is transmitted to the other end of the second optical signal transmission cable. The second optical signal transmitted to the end side is led out to the eleventh input / output terminal of the fourth bidirectional wavelength division multiplexing coupler, and the fourth optical signal transmitted to one end side of the second optical signal transmission cable is transmitted. Is guided to the fifth input / output terminal of the third bidirectional wavelength-division multiplexing coupler.

[0032] Claim 17 in the claims of the present application
The data transmission method according to any one of the first to twenty-fourth aspects is characterized in that the first and second data are based on digital data forming a 720P signal or digital data forming a 720P signal and parallel data forming an additional information data sequence. 2 is obtained, and first and second serial data are obtained based on the first and second word string data, respectively, and the first serial data is converted into a first optical signal having a first center wavelength. And converting the second serial data into a second optical signal having a second center wavelength different from the first center wavelength, multiplexing the first and second optical signals, and multiplexing the multiplexed optical signal. And the multiplexed optical signal is sent to the first optical signal transmission cable and transmitted from one end to the other end, and the third serial data is converted into a third optical signal having a third center wavelength. conversion Then, the third optical signal is transmitted to the second optical signal transmission cable and transmitted from one end to the other end of the second optical signal transmission cable, and the other end of the first optical signal transmission cable is transmitted. The first and second optical signals are separated from each other to obtain a third optical signal transmitted to the other end of the second optical signal transmission cable. Is derived from the second optical signal transmission cable.

Claim 25 in the claims of the present application
The data transmission method according to the invention described in any one of the first to twenty-ninth aspects is characterized in that the first and second data are based on digital data forming a 720P signal or digital data forming a 720P signal and parallel data forming an additional information data sequence. 2nd and 3rd word string data, 1st, 2nd and 3rd serial data based on the 1st, 2nd and 3rd word string data, respectively, and The composite serial data is formed by performing multiplexing and combining processing, the composite serial data is converted into a first optical signal having a first center wavelength, and the first optical signal is provided on one end side with first and second optical signals. The second bidirectional wavelength-division multiplexing coupler having two input / output terminals and a third input / output terminal on the other end side supplies the first input / output terminal to the first input / output terminal. sex A first optical signal led out to a third input / output end of the long multiplex coupler is sent to a first optical signal transmission cable and transmitted from one end to the other end, and a third serial data is transmitted. Is converted into a second optical signal having a second center wavelength, and the second optical signal is provided with fourth and fifth input / output terminals on one end and a sixth optical signal on the other end. To the fourth input / output terminal of the second bidirectional wavelength multiplexing coupler provided with the input / output terminal of
A second optical signal led out to a sixth input / output terminal of the bidirectional wavelength multiplexing coupler is sent to a second optical signal transmission cable and transmitted from one end to the other end of the second optical signal transmission cable. Is converted into a third optical signal having a third central wavelength different from the first central wavelength, and the third optical signal is supplied to one end of a seventh and eighth input / output terminals. And a ninth input / output terminal is provided on the other end of the third bidirectional wavelength-division multiplexing coupler. The third optical signal guided to the ninth input / output terminal is sent to the first optical signal transmission cable and transmitted from the other end to one end, and the fifth serial data is transmitted to the second center wavelength. Is converted to a fourth optical signal having a fourth center wavelength different from the first optical signal, and the fourth optical signal is The tenth input / output terminal is provided with a zeroth and an eleventh input / output terminal and a twelfth input / output terminal is provided on the other end side. A fourth optical signal led out to a twelfth input / output terminal of the bidirectional wavelength multiplexing coupler is sent to a second optical signal transmission cable and transmitted from the other end to one end, and The first optical signal transmitted to the other end of the optical signal transmission cable is led out to the eighth input / output terminal of the third bidirectional wavelength multiplexing coupler, and the first optical signal is transmitted to one end of the first optical signal transmission cable. The third optical signal transmitted to
Out to the second input / output end of the bidirectional wavelength division multiplexing coupler, and transmits the second optical signal transmitted to the other end of the second optical signal transmission cable to the fourth bidirectional wavelength division multiplexing coupler. First
And the fourth optical signal transmitted to one end of the second optical signal transmission cable to the fifth input / output terminal of the second bidirectional wavelength division multiplexing coupler. It is assumed.

Claim 30 in the claims of the present application
The data transmission apparatus according to the invention described in (1), wherein the first and second word string data based on the digital data forming the 720P signal or the digital data forming the 720P signal and the parallel data forming the additional information data sequence are obtained. A processing unit, a parallel / serial (P / S) conversion unit for obtaining first and second serial data based on the first and second word string data, respectively, and bit multiplexing / combining the first and second serial data A first optical signal forming unit that performs processing to form composite serial data, converts the composite serial data into a first optical signal having a first central wavelength, and converts the third serial data into a first central signal. A second optical signal forming unit for converting into a second optical signal having a second center wavelength different from the wavelength, and first and second input / output terminals provided on one end side Both are provided with a third input / output terminal on the other end side, and a first bidirectional signal is supplied to the first input / output terminal to be led out to the third input / output terminal. A wavelength multiplexing coupler having fourth and fifth input / output terminals provided on one end side and a sixth input / output terminal provided on the other end side; A second bidirectional wavelength division multiplexing coupler supplied to the terminal and guided to a sixth input / output terminal; and a first light guided to a third input / output terminal of the first bidirectional wavelength division multiplexing coupler. A signal is transmitted from one end to the other end, and a second optical signal guided to the sixth input / output end of the second bidirectional wavelength division multiplexing coupler is transmitted from the other end to one end. , The first optical signal is guided to the fifth input / output terminal of the second bidirectional wavelength division multiplexing coupler, and the second optical signal is transmitted to the first bidirectional wavelength multiplexing coupler. Constructed and a optical signal transmission cable that forms as derived in the second input and output terminals of the multiplexing coupler.

Claim 31 of the present application
The data transmission apparatus according to the invention described in (1), wherein the digital data forming the 720P signal or the digital data forming the 720P signal and the data for obtaining the first and second word string data based on the parallel data forming the additional information data sequence A processing unit for obtaining first and second serial data based on the first and second word string data, respectively;
/ S converter, a first optical signal forming unit that converts the first serial data into a first optical signal having a first central wavelength, and a second optical data forming unit that converts the second serial data into a first optical signal having a second central wavelength. A second optical signal forming unit for converting the third serial data into a second optical signal, and a third optical signal for converting the third serial data into a third optical signal having a third central wavelength different from the first central wavelength. A forming unit, a fourth optical signal forming unit that converts the fourth serial data into a fourth optical signal having a fourth center wavelength different from the second center wavelength, and a first and a second unit on one end side. And a third input / output terminal is provided on the other end side, and a first optical signal is supplied to the first input / output terminal and led to the third input / output terminal. First and second bidirectional wavelength multiplexing couplers, and fourth and fifth input / output terminals provided on one end side and the other end portion A second bidirectional wavelength-division multiplexing coupler, wherein a second optical signal is supplied to the fourth input / output terminal and led out to the sixth input / output terminal. Seventh and eighth input / output terminals are provided at one end, and a ninth input / output terminal is provided at the other end. A third optical signal is supplied to the seventh input / output terminal. A third bidirectional wavelength division multiplexing coupler led out to a ninth input / output end, tenth and eleventh input / output ends provided on one end side, and a twelfth input / output end provided on the other end side. A fourth bidirectional wavelength division multiplexing coupler, wherein a fourth optical signal is supplied to a tenth input / output terminal and led out to a twelfth input / output terminal; A first optical signal guided to a third input / output terminal of the coupler is transmitted from one end to the other end, and a third bidirectional wavelength multiplexing is performed. Ninth Ppura
The third optical signal guided to the input / output end of the third optical signal is transmitted from the other end to the one end, and the first optical signal is guided to the eighth input / output end of the third bidirectional wavelength division multiplexing coupler. And the third
A first optical signal transmission cable for leading an optical signal of the second bidirectional wavelength division multiplexing coupler to a second input / output terminal of the first bidirectional wavelength division multiplexing coupler; and a sixth input terminal of the second bidirectional wavelength division multiplexing coupler. The second optical signal guided to the output terminal is transmitted from one end to the other end, and the fourth optical signal guided to the twelfth input / output terminal of the fourth bidirectional wavelength-division multiplexing coupler is transmitted. The second optical signal is transmitted from the other end to the one end, the second optical signal is guided to the eleventh input / output terminal of the fourth bidirectional wavelength division multiplexing coupler, and the fourth optical signal is transmitted to the second bidirectional wavelength multiplexing coupler. A second optical signal transmission cable to be led out to a fifth input / output terminal of the chromatic wavelength multiplexing coupler.

Claim 32 in the claims of the present application
The data transmission apparatus according to the invention described in (1), wherein the digital data forming the 720P signal or the digital data forming the 720P signal and the data for obtaining the first and second word string data based on the parallel data forming the additional information data sequence A processing unit for obtaining first and second serial data based on the first and second word string data, respectively;
/ S converter, a first optical signal forming unit that converts the first serial data into a first optical signal having a first central wavelength, and a second serial data that is different from the first central wavelength. A second optical signal forming unit that converts the third serial data into a second optical signal having a second center wavelength, and a third optical signal that converts the third serial data into a third optical signal having a third center wavelength A forming unit, a multiplexing unit that multiplexes the first and second optical signals to obtain a multiplexed optical signal, a first optical signal transmission cable that transmits the multiplexed optical signal from one end to the other end, A demultiplexing unit that demultiplexes a multiplexed optical signal guided to the other end of the first optical signal transmission cable to obtain first and second optical signals in a state where they are separated from each other; And a second optical signal transmission cable for transmitting the signal from one end to the other end.

Claim 33 in the claims of the present application
The first, second, and third word string data based on the digital data forming the 720P signal or the digital data forming the 720P signal and the parallel data forming the additional information data sequence A P / S converter for obtaining first, second and third serial data based on the first, second and third word string data, respectively, and a first and second serial data Performs a bit multiplexing / synthesizing process to form composite serial data, converts the composite serial data into a first optical signal having a first central wavelength, a first optical signal forming unit, A second optical signal forming unit that converts the fourth serial data into a second optical signal having a second central wavelength; and a third optical signal forming unit that converts the fourth serial data into a third optical signal having a third central wavelength different from the first central wavelength. Fourth converting the third optical signal forming section for converting the optical signal, the fourth optical signal having a fourth center wavelength of which is different from the fifth serial data a second center wavelength
An optical signal forming unit, and first and second input / output terminals are provided on one end side and a third input / output terminal is provided on the other end side. A first bidirectional wavelength-division multiplexing coupler supplied to an input / output terminal and led to a third input / output terminal, and fourth and fifth input / output terminals provided on one end and a second input / output terminal provided on the other end A sixth input / output terminal is provided, and the second optical signal is supplied to the fourth input / output terminal and the sixth optical signal is supplied to the sixth input / output terminal.
A second bidirectional wavelength-division multiplexing coupler led out to the input / output end, and a seventh and eighth input / output end provided on one end side and a ninth input / output end provided on the other end side Consisting of
A third bidirectional wavelength-division multiplexing coupler in which a third optical signal is supplied to a seventh input / output terminal and guided to a ninth input / output terminal;
Tenth and eleventh input / output terminals are provided on one end side and twelfth input / output terminals are provided on the other end side,
A fourth bidirectional wavelength division multiplexing coupler in which a fourth optical signal is supplied to a tenth input / output terminal and led out to a twelfth input / output terminal; and a third bidirectional wavelength division multiplexing coupler of the first bidirectional wavelength division multiplexing coupler. The first optical signal guided to the input / output terminal is transmitted from one end to the other end, and the ninth multiplex coupler of the third bidirectional wavelength multiplexing coupler is transmitted.
The third optical signal guided to the input / output end of the third optical signal is transmitted from the other end to the one end, and the first optical signal is guided to the eighth input / output end of the third bidirectional wavelength division multiplexing coupler. And the third
A first optical signal transmission cable for leading an optical signal of the second bidirectional wavelength division multiplexing coupler to a second input / output terminal of the first bidirectional wavelength division multiplexing coupler; and a sixth input terminal of the second bidirectional wavelength division multiplexing coupler. The second optical signal guided to the output terminal is transmitted from one end to the other end, and the fourth optical signal guided to the twelfth input / output terminal of the fourth bidirectional wavelength-division multiplexing coupler is transmitted. The second optical signal is transmitted from the other end to the one end, the second optical signal is guided to the eleventh input / output terminal of the fourth bidirectional wavelength division multiplexing coupler, and the fourth optical signal is transmitted to the second bidirectional wavelength multiplexing coupler. A second optical signal transmission cable to be led out to a fifth input / output terminal of the chromatic wavelength multiplexing coupler.

The data transmission method according to any one of claims 1 to 24 in the claims of the present application as described above, or any one of claims 30 to 32 In the data transmission device according to the described invention, first and second serial data based on digital data forming a 720P signal or digital data forming a 720P signal and parallel data forming an additional information data sequence are provided; Third serial data or third and fourth serial data different from them are converted into a plurality of optical signals, which are bidirectionally transmitted through one optical signal transmission cable or two optical signal transmission cables. You.

Each optical signal is reliably obtained at the transmission destination through the optical signal transmission cable for each optical signal.
If necessary, the first and second serial data and the third serial data or the third and fourth serial data are reproduced based on each optical signal obtained at the transmission destination.

In such a case, the bidirectional transmission of the first and second serial data and the third serial data or the third and fourth serial data is performed, for example, by serial transmission of a digital video signal in accordance with HD SDI. Can be performed by utilizing the existing circuit components used for the above.

The data transmission method according to the invention described in any one of claims 25 to 29 in the claims of the present application as described above, or the data transmission method according to the invention described in claim 33 In the data transmission apparatus, first, second and third serial data based on digital data forming a 720P signal and parallel data forming an additional information data sequence, and fourth and fifth serial data different from the first and second serial data are provided. The serial data is converted into a plurality of optical signals, which are transmitted bidirectionally through two optical signal transmission cables.

Each optical signal is reliably obtained at the transmission destination through the optical signal transmission cable for each optical signal.
If necessary, the first, second, and third serial data and the fourth and fifth serial data are reproduced based on each optical signal obtained at the transmission destination.

In such a case, the bidirectional transmission of the first, second, and third serial data and the fourth and fifth serial data is performed, for example, in accordance with HD SDI serial transmission of digital video signals. This can be done using existing circuit components used.

The data transmission method or the data transmission apparatus according to the invention described in the claims of the present application is capable of calculating, for example, the number of quantization bits obtained from each of a plurality of video cameras constituting a camera unit. Digital data forming a 720P signal, or digital data forming a 720P signal, and a key, having 10 bits or more.
The camera unit and signal recording of a plurality of optical signals obtained by converting a plurality of serial data based on parallel data forming a signal data series and a serial data based on one or two other return data different from them. When applied to bidirectional transmission using an optical signal transmission cable between the reproduction unit, using an optical signal transmission cable between the camera unit and the signal recording and reproduction unit of such a plurality of optical signals Can be efficiently performed using existing circuit components to minimize the number of optical signal transmission cables, thus effectively reducing costs and the like.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment 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. 30 shows an example of a data transmission device according to the invention described in claim 30 in the range of.

In the example shown in FIG.
A bidirectional transmission between the digital data forming the 720P signal or the key signal data sequence as the additional information data sequence and the return data between 0 and the signal recording / reproducing unit 11; Have been. 720 from the camera unit 10
Data DVX forming the P signal is sent out and supplied to the data processing unit 12.

The data DVX is shown as data DVA12, DVA14 or DVA16 in FIG. 35, the frame rate is 60 Hz, the number of effective lines in each frame is 720 lines, the sampling frequency is 74.25 MHz, the effective data sample in each line is Digital data forming a 720P signal of 4: 2: 2 format in which the number is set to 1280 samples and the number of quantization bits is 12, 14, or 16 bits. In FIG. 35, data DVB10 or DVB.
Let the frame rate, shown as 12, be 60 Hz,
The number of effective lines in each frame is set to 720 lines, the sampling frequency is set to 74.25 MHz, the number of effective data samples in each line is set to 1280,
Digital data forming a 720P signal in 4: 4: 4 format in which the number of quantization bits is 10 bits or 12 bits. In FIG. 35, the frame rate is 60 Hz, shown as data DVA10 + DKA10, and the number of effective lines in each frame is 720. A line, a sampling frequency is 74.25 MHz, the number of valid data samples in each line is set to 1280, and the number of quantization bits is 10 bits.
Data DVA10 forming a signal and a Key signal data sequence DKA10 (4:
2: 2: 4 format data) or FIG.
5, the data DVB10 and the Key signal data sequence DKB10 (4: 4:
4: 4 data).

The data DVX has a quantization bit number of 12 bits.
Digit that forms 720P signal in 4: 2: 2 format
In the case of DVA12 shown in FIG.
In this case, the DVA 12 can be used as shown in FIG.
12-bit code transfer rate of 74.25 MBps
The Y data sequence as word string data and the word transmission level
12-bit word string data with a rate of 74.25 MBps
P_B/ P _RData series and frame synchronization
And multiplexed in parallel with line synchronization.
The word transmission rate of the parallel data
As a 24-bit word string data set to 4.25 MBps
Then, it is supplied to the data processing unit 12.

In the data processing unit 12, the DVA 12 supplied as shown in FIG.
12-bit words YD0, YD constituting data series
1, YD2, YD3, ·····, and, P _B / P _R data sequence constitutes 12-bit word PBD0, PrD
0, PbD1, PrD1, PbD2, PrD2,.
.. each of the upper 10 bits Y0; 2 to Y0; 11,
Y1; 2 to Y1; 11, Y2; 2 to Y2; 11, Y3;
2 to Y3; 11,..., And Pb0;
0; 11, Pr0; 2 to Pr0; 11, Pb1;
b1; 11, Pr1; 2 to Pr1; 11, Pb2; 2
Pb2; 11, Pr2; 2 to Pr2; 11, ...
And lower two bits Y0; 0 to Y0; 1, Y1;
1; 1, Y2; 0 to Y2; 1, Y3; 0 to Y3;
... and Pb0; 0 to Pb0; 1, Pr0; 0
~ Pr0; 1, Pb1; 0-Pb1; 1, Pr1; 0
1, Pb2; 0-Pb2, 1, Pr2; 0-P
.., is performed.

Subsequently, a sequence of the divided upper 10 bits:
Y0; 2 to Y0; 11, Y1; 2 to Y1; 11, Y2;
2-Y2; 11, Y3; 2-Y3; 11, ...
And a sequence of the divided upper 10 bits: Pb0;
0; 11, Pr0; 2 to Pr0; 11, Pb1;
b1; 11, Pr1; 2 to Pr1; 11, Pb2; 2
Pb2; 11, Pr2; 2 to Pr2; 11, ...
And a word transmission rate of 7
20-bit word string data DV with 4.25 MBps
A12A is formed as a link A based on the divided upper 10 bits as shown in FIG. 2B.

At the same time, the divided lower two bits Y
0; 0 to Y0; 1, Y1; 0 to Y1; 1, Y2;
2; 1, Y3; 0 to Y3; 1,... And 8-bit auxiliary bits α0, α1, α2, α3,. 1 + α0, Y
1; 0 to Y1, 1 + α1, Y2; 0 to Y2, 1 + α2
Y3; 0 to Y3; 1 + α3,..., And the divided lower two bits Pb0; 0 to Pb0; 1, Pr
0; 0 to Pr0; 1, Pb1; 0 to Pb1; 1, Pr
1, 0-Pr1; 1, Pb2; 0-Pb2; 1, Pr
2; 0 to Pr2; 1,..., And 8 auxiliary bits β0, β1, β2, β3, β4, β5,.
, And 10 bits Pb0; 0 to Pb0; 1 + β
0, Pr0; 0 to Pr0; 1 + β1, Pb1; 0 to Pb
1; 1 + β2, Pr1; 0 to Pr1; 1 + β3, Pb
2; 0 to Pb2; 1 + β4, Pr2; 0 to Pr2; 1+
β5, ... And a 10-bit string: Y
0; 0 to Y0; 1 + α0, Y1; 0 to Y1; 1 + α1,
Y2; 0 to Y2; 1 + α2, Y3; 0 to Y3; 1 + α
..., 10-bit string: Pb0; 0 to Pb
0; 1 + β0, Pr0; 0 to Pr0; 1 + β1, Pb
1; 0 to Pb1, 1 + β2, Pr1; 0 to Pr1, 1+
β3, Pb2; 0 to Pb2; 1 + β4, Pr2;
The word transmission rate is 74.25 MBps, which is obtained by parallel multiplexing of r2; 1 + β5,.
The bit word string data DVA12B is formed as a link B based on the divided lower two bits as shown in FIG. 2C. That is, the word transmission rate is set to 74.25.
DVA which is 24-bit word string data with MBps
12 is converted into two types of word string data: 20-bit word string data DVA12A having a word transmission rate of 74.25 MBps and 20-bit word string data DVA12B having a word transmission rate of 74.25 MBps.

When the data DVX is the data DVA14 shown in FIG. 35 as digital data forming a 720P signal of 4: 2: 2 format having a quantization bit number of 14 bits, or a quantization bit number of 16 bits In the case of the data DVA 16 shown in FIG. 35 as digital data forming a 720P signal in 4: 2: 2 format, the data DVA 14 has a word transmission rate of 74.2.
The data processing unit 1 converts the data DVA16 into 32-bit word string data, which is parallel data having a word transmission rate of 74.25 MBps, as 28-bit word string data which is parallel data having a rate of 5 MBps.
2 is supplied. And the data DVX is the data DVA
In the same manner as in the case of No. 12, 20-bit word string data DVA14A and DVA14B each having a word transmission rate of 74.25 MBps, or 20-bit word string data DVA16A and DVA16B each having a word transmission rate of 74.25 MBps. Is formed.

However, in such a case, the data DVX is
Data DVA12, each of the Y data series
12 bit word and P_B/ P_RConfigure data series
Each 12-bit word is represented by the upper 10 bits and lower 2 bits.
Instead of dividing data into bits, data DVX is DA1
If the number is 4, each of the 14 bits forming the Y data sequence
Toward and P_B/ P_REach of the 14 videos that make up the data series
The upper 10 bits and the lower 4 bits, respectively.
And the data DVX is the data DVA16.
The 16-bit word that composes the Y data sequence.
C and P_B/ P _REach 16-bit word that constitutes a data sequence
Each of the code is divided into upper 10 bits and lower 6 bits
I do. Thereby, the word transmission rate is 74.25 MB.
Data DV that is 28-bit word string data with ps
A14, each having a word transmission rate of 74.25 MBp
20s word string data DVA14A and D
VA14B is converted into word string data of two systems.
32-bit with a word transmission rate of 74.25 MBps
Data DA16, which is the word string data,
20-bit word with a transmission rate of 74.25 MBps
Code string data DVA16A and DVA16B.
It is converted into word string data.

Data DVX shown in FIG. 35 is digital data DVB shown in FIG. 35 as digital data forming a 4: 4: 4 digital video signal having a quantization bit number of 10 bits.
In the case of 10, as shown in FIG. 3, the data DVB10 has a G data sequence of 10-bit word string data with a word transmission rate of 74.25 MBps and a word transmission rate of 74.25 MBps. 10
The B data sequence as bit word sequence data and the R data sequence as 10 bit word sequence data with a word transmission rate of 74.25 MBps are obtained by parallel multiplexing under frame synchronization and line synchronization. The word transmission rate, which is parallel data, is set to 74.
As 30-bit word string data of 25 MBps,
The data is supplied to the data processing unit 12.

In the data processing section 12, the data DVB10 supplied as shown in FIG.
As shown in FIG. 4, 10-bit words GD0, GD1, GD2, GD3,.
.., A 10-bit word BD0 constituting a B data sequence
BD1, BD2, BD3,... And 10-bit words RD0, RD1, RD constituting an R data sequence
, RD3,..., 10-bit words aD0, aD1, aD2, aD3,.
... is added. Then, as shown in FIG. 4 by being divided by a thick solid line, 10-bit words GD0, GD1, GD2, GD3,.
... And every other 10-bit word BD0, BD2, BD4, BD in the B data sequence
... And every other 10-bit word RD0, RD2, RD of the 10-bit words forming the R data sequence
, RD6,..., And 10-bit words aD0, aD1, aD2, aD3,. Every other bit word BD1, BD3, BD5, BD7,...
, And every other one of the 10-bit words RD1, RD3, RD5, RD constituting the R data sequence
.. Are divided into 10-bit word groups 2 including 7,.

Subsequently, based on the 10-bit word group 1, the word transmission rate is set to 74.25 MBps2.
The 0-bit word string data DVB10A is formed as a link A as shown in FIG. At the same time, based on the 10-bit word group 2, 20-bit word string data DVB10B having a word transmission rate of 74.25 MBps is formed as a link B as shown in FIG. That is, if the word transmission rate is 7
DVB10, which is 30-bit word string data of 4.25 MBps, each has a word transmission rate of 74.25.
20-bit word string data DVB10A with MBps
, And DVB 10B.

The data DVX shown in FIG. 35 is digital data DVB shown in FIG.
12, the DVB 12 sets the word transmission rate to 74.25 MBps as shown in FIG.
A G data sequence as 2-bit word sequence data, a B data sequence as 12-bit word sequence data with a word transmission rate of 74.25 MBps, and a 12-bit word sequence data with a word transmission rate of 74.25 MBps. A word transmission rate of 74.25 MB, which is parallel data obtained by performing parallel multiplexing with the obtained R data sequence under frame synchronization and line synchronization.
The data is supplied to the data processing unit 12 as 36-bit word string data of ps.

In the data processing section 12, the data DB 12 supplied as shown in FIG.
12-bit words GD0, GD constituting a data sequence
, GD2, GD3,..., 12-bit words BD0, BD1, BD2, and BD forming a B data sequence
,... And 12-bit words RD0, RD1, RD2, RD3,.
· Each of the upper 10 bits G0; 2 to G0; 11, G
1; 2 to G1; 11, G2; 2 to G2; 11, G3; 2
... G3; 11, ..., B0; 2-B0; 11, B
1; 2 to B1; 11, B2; 2 to B2; 11, B3; 2
... B3; 11, ..., and R0; 2-R0; 1
1, R1; 2 to R1; 11, R2; 2 to R2; 11, R
3; 2 to R3; 11,...
0; 0 to G0; 1, G1; 0 to G1; 1, G2;
2; 1, G3; 0 to G3; 1, ..., B0;
B0; 1, B1; 0 to B1; 1, B2; 0 to B2; 1,
B3; 0 to B3; 1,..., And R0;
0; 1, R1; 0 to R1; 1, R2; 0 to R2; 1, R
3; 0 to R3; 1,...

Subsequently, the divided lower two bits G0; 0
0 to B0; 1 and R0; 0 to R0;
1 is bit-multiplexed, and 6-bit GBR0 (0 to 1) is divided into the lower 2 bits G1; 0 to G1; 1, B1;
B1; 1 and R1; 0 to R1;
2; 1, B2; 0 to B2; 1 and R2; 0 to R2; 1 are bit-multiplexed, and 6-bit GBR2 (0 to 1)
Bit G3; 0 to G3; 1, B3; 0 to B3; 1 and R
3; 0 to R3; 1 are bit-multiplexed and 6-bit GBR3
(0-1) are formed. Further, 6-bit GBR0 (0 to 1), GBR1 (0 to 1), GBR2
(0-1), GBR3 (0-1),..., 4-bit auxiliary bits γ0, γ1, γ2, γ3,.
, And 10-bit GBR0 (0 to 1) + γ0,
GBR1 (0-1) + γ1, GBR2 (0-1) + γ
2, GBR3 (0 to 1) + γ3,...

Next, the divided upper 10 bits G0; 2
~ G0; 11, G1; 2-G1; 11, G2; 2-G
2; 11, G3; 2 to G3; 11,..., B0;
2-B0; 11, B1; 2-B1; 11, B2; 2-B
2; 11, B3; 2 to B3; 11, ..., and
R0; 2 to R0; 11, R1; 2 to R1; 11, R2;
... Are assigned to group 1 and group 2, and 10 bits GBR0 (0 to 1) + γ0, GBR are assigned to group 2.
1 (0-1) + γ1, GBR2 (0-1) + γ2, GB
By adding R3 (0 to 1) + γ3,..., A 10-bit word group 1 and a 10-bit word group 2 are obtained as separated by the thick solid line in FIG.

The word transmission rate based on the 10-bit word group 1 shown in FIG.
20-bit word string data DVB12A at Bps
Is formed as a link A as shown in FIG. 8A, and 20-bit word string data DVB12B having a word transmission rate of 74.25 MBps based on the 10-bit word group 2 shown in FIG. B is formed as shown in FIG. That is,
DVB12 which is 36-bit word string data having a word transmission rate of 74.25 MBps, 20-bit word string data DVB12A having a word transmission rate of 74.25 MBps, and a word transmission rate of 74.25 MB
This is converted into two-system word string data, that is, 20-bit word string data DVB12B with ps.

When the data DVX is the data DVA10 + DKA10 shown in FIG. 35 as 4: 2: 2: 4 format data with the quantization bit number being 10 bits, the data DVA10 + DKA10 is as shown in FIG. And a Y data sequence and P _B / P _R that form a 720P signal in 4: 2: 2 format, each having a quantization bit number of 10 bits and a word transmission rate of 74.25 MBps.
K which has the same data format as the data sequence (DVA10) and the Y data sequence, has a quantization bit number of 10 bits, and has a word transmission rate of 74.25 MBps.
The word transmission rate is 7 which is parallel data obtained by performing parallel multiplexing with the ey signal data sequence (DKA10) under frame synchronization and line synchronization.
The data is supplied to the data processing unit 12 as 30-bit word string data of 4.25 MBps.

In the data processing unit 12, the data DVA10 + DKA1 supplied as shown in FIG.
The following processing is performed on 0.

As shown in FIG. 9, 10-bit words YD0, YD1, YD2, YD constituting a Y data sequence
... That constitutes the P _B / P _R data series
0-bit words PbD0, PrD0, PbD1, PrD
1, PbD2, PrD2, and ..., and the parallel multiplexed, the as shown in A of FIG. 10, based on the Y data sequence and P _B / P _R data sequence, 74.25 MBps word transmission rate 20-bit word string data D
VC10A is formed as link A. In addition, 10-bit words AD0, AD1, AD2, and AD constituting a Key signal data sequence as shown in FIG.
... And an auxiliary 10-bit word αD0, αD
, And αD2, αD3,... Are multiplexed in parallel, and the word transmission rate based on the Key signal data sequence and the auxiliary 10-bit word is set to 74.25 Mbps as shown in FIG. 20-bit word string data DVC10B is formed as link B.

That is, the word transmission rate is set to 74.25 MB.
Data DVA10 + DKA10 forming 30-bit word string data having a word transmission rate of 74.ps.
20-bit word string data DVC1 with 25 MBps
0A and 20-bit word string data DVC10B having a word transmission rate of 74.25 MBps are converted into two-system word string data.

When the data DVX is the data DVB10 + DKB10 shown in FIG. 35 as 4: 4: 4: 4 format data in which the number of quantization bits is 10 bits, the data DVB10 + DKB10 is shown in FIG. To form a 720P signal in 4: 4: 4 format,
Each has a G data sequence, a B data sequence, and an R data sequence (DVB10), each having a quantization bit number of 10 bits and a word transmission rate of 74.25 MBps, and a data format equivalent to the G data sequence. A word transmission rate of 74.25 MB with the number being 10 bits
The Key signal data sequence (DKB10) as ps
The data is supplied to the data processing unit 12 as 40-bit parallel data having a word transmission rate of 74.25 MBps, which is parallel data obtained by performing parallel multiplexing under frame synchronization and line synchronization.

In the data processing unit 12, the data DVB10 + DKB supplied as shown in FIG.
The following processing is performed on 10.

As shown in FIG. 11, 10-bit words GD0, GD1, GD2, G
.., 10-bit words BD0, BD1, BD2, BD3,.
10-bit words RD0, RD constituting R data sequence
, RD2, RD3,..., And 10-bit words AD0, AD1,
, AD2, AD3,... Are divided as indicated by thick solid lines in FIG. 12 to form 10-bit words GD0, GD1, GD2,
, And 10-bit words BD0, BD2,... Forming a B data sequence and 10-bit words RD0, RD2,.
, And 10-bit words AD0, AD1, forming a Key signal data sequence
..., 10-bit words BD1, BD3, ..., forming a B data sequence and 10-bit words RD1, RD3, forming an R data sequence
... And 10-bit word group 2 including Then, the word transmission rate is set to 74.25 MB based on the 10-bit word group 1 shown in FIG.
20 bits word string data DVD10A with
As a link A, a 20-bit word string data DVD 10B having a word transmission rate of 74.25 MBps based on the 10-bit word group 2 shown in FIG. , Are formed as shown in FIG.

That is, the word transmission rate is set to 74.25 MB.
The data DVB10 + DKB10 forming 40-bit word string data having a word transmission rate of 74.
20-bit word string data DVD1 with 25 MBps
0A and 20-bit word string data DVD 10B with a word transmission rate of 74.25 MBps are converted into two-system word string data.

The data processing section 12 is a set of 20-bit word string data DVA12A and DVA12B, a set of DVA14A and DVA14B, and a set of DVA16A with a word transmission rate of 74.25 MBps obtained as described above.
And DVB16B, DVB10A and DVB10B
Set, DVB12A and DVB12B, DVC10
A and DVC10B, DVD10A and DV
One of the sets of D10B is derived as a set of 20-bit word string data DPA (20) and DPB (20).

The 20-bit word string data DPA (20) having a word transmission rate of 74.25 MBps sent from the data processing unit 12 is supplied to the P / S conversion unit 13. The P / S conversion unit 13 performs P / S conversion on the 20-bit word string data DPA (20) to increase the bit transmission rate based on the 20-bit word string data DPA (20) to 74.25 MBps × 20 = 1.485Gbp
s is formed, and the serial data DSA is supplied to the bit multiplexing unit 14.

On the other hand, the 20-bit word string data DPB (20) having a word transmission rate of 74.25 MBps sent from the data processing unit 12 is supplied to the P / S conversion unit 15. The P / S converter 15 performs P / S conversion on the 20-bit word string data DPB (20),
The bit transmission rate based on the 20-bit word string data DPB (20) is set to 74.25 MBps × 20 = 1.485
It forms serial data DSB having Gbps and supplies the serial data DSB to the bit multiplexing unit 14.

The bit multiplexing unit 14 is configured using, for example, a 2-bit multiplexer, and the P / S conversion unit 13
From the serial data DSA from the P / S converter 15 and the serial data DSB from the P / S converter 15 to alternately take out the 1-bit address.
Is subjected to a bit multiplexing / combining process to form composite serial data DSZ having a bit transmission rate of 1.485 Gbps × 2 = 2.97 Gbps. Thus, the composite serial data DSZ obtained from the bit multiplexing unit 14
Is supplied to an electro-optical converter (E / O converter) 16. E
The / O conversion unit 16 performs electro-optical conversion processing on the composite serial data DSZ to form an optical signal OZ having a bit transmission rate of 2.97 Gbps and a center wavelength of about 1.55 μm, for example.

An example of the E / O converter 16 is, as shown in FIG. 14, for example, as shown in FIG.
55 μm distributed feedback (DFB) laser diode 18
And is provided. Then, the composite serial data DSZ from the bit multiplexing unit 14 is supplied to the laser driving unit 17 and the composite serial data DSZ is supplied from the laser driving unit 17.
A laser drive signal SLD corresponding to Z is obtained and supplied to the DFB laser diode 18 in the 1.55 μm band.

1.55 μm band DFB laser diode 1
8 oscillates in a single wavelength mode and emits a laser beam having a center wavelength of about 1.55 μm, for example, as shown in FIG.
It is about ° C. 1. The laser drive signal SLD is supplied.
The 55 μm band DFB laser diode 18 emits a 1.55 μm band laser beam having a center wavelength of approximately 1.55 μm in a state modulated by the laser drive signal SLD. An optical signal OZ having a center wavelength of about 1.55 μm based on the data DSZ is obtained with a bit transmission rate of 2.97 Gbps. This optical signal OZ is supplied to a bidirectional wavelength multiplexing (WDM) coupler 19.

The bidirectional WDM coupler 19 is, for example,
It has a configuration represented by equivalent block connections as shown in FIG. In the equivalent block connection shown in FIG. 16, a directional coupling unit 20 is provided. An input / output end 24 connected via an optical connector 23 is provided, and an input / output end 26 connected via an optical connector 25 is provided on the other end side of the directional coupling unit 20. ing. The directional coupling unit 20 is a part where the optical fiber connected to the optical connector 21 and the optical fiber connected to the optical connector 23 are mutually connected and connected to the optical connector 25.

The bit transmission rate from the E / O converter 16 is set to 2.97 Gbps, and the center wavelength is set to approximately 1.97 Gbps.
An optical signal OZ having a length of 55 μm is guided from the input / output terminal 22 to the directional coupling unit 20 through the optical connector 21. In the directional coupling section 20, the optical signal OZ from the optical connector 21 through the optical fiber is transmitted to the optical connector 25 through the optical fiber formed by mutually coupling the optical fiber from the optical connector 21 and the optical fiber from the optical connector 23. Be guided. Thus, the optical signal OZ that has passed through the directional coupling unit 20 is led out to the input / output terminal 26 through the optical connector 25. Thus, the bidirectional WDM coupler 19
Is guided to the optical connector 30.

The optical connector 30 connects the bidirectional WDM coupler 19 and one end of the optical signal transmission cable 31. As a result, the optical signal OZ from the bidirectional WDM coupler 19 is transmitted to the optical signal transmission cable 31 through the optical connector 30 from one end thereof. The optical signal transmission cable 31 is formed of, for example, quartz-based SMF.

At the other end of the optical signal transmission cable 31, an optical connector 33 for connecting the optical signal transmission cable 31 to the bidirectional WDM coupler 32 is provided. Thereby, the optical connector 30
The optical signal OZ transmitted from one end to the optical signal transmission cable 31 through the optical signal transmission cable 31 is transmitted from one end to the other end of the optical signal transmission cable 31, and the optical connector 3
3 to the bidirectional WDM coupler 32.

The bidirectional WDM coupler 32 is, for example,
It has a configuration represented by equivalent block connections as shown in FIG. In the equivalent block connection shown in FIG. 17, a directional coupling unit 34 is provided, and an input / output terminal 36 connected via an optical connector 35 is connected to the other end of the directional coupling unit 34. Further, an input / output end 38 connected via an optical connector 37 and an input / output end 40 connected via an optical connector 39 are provided at one end of the directional coupling portion 34. ing. The directional coupling portion 34 is a portion where the optical fiber connected to the optical connector 35 is branched and connected to the optical connector 37 and the optical connector 39, respectively.

The optical signal OZ from the optical connector 33
Is guided from the input / output end 36 to the directional coupling unit 34 through the optical connector 35. In the directional coupling section 34, the optical signal OZ from the optical connector 35 through the optical fiber
Is guided to the optical connector 37 through the branched optical fiber. Thus, the optical signal OZ that has passed through the directional coupling unit 34 is led out to the input / output end 38 through the optical connector 37. The optical signal OZ guided to the input / output terminal 38 in this manner is sent from the bidirectional WDM coupler 32 and guided to the photoelectric conversion unit (O / E conversion unit) 41.

In the O / E converter 41, the bit transmission rate is set to 2.97 Gbps, and the center wavelength is set to approximately 1.55.
The optical signal OZ of μm is subjected to photoelectric conversion processing to reproduce composite serial data DSZ having a bit transmission rate of 2.97 Gbps based on the optical signal OZ. Then, the reproduced composite serial data DSZ is output to the bit separation unit 4.
2 is supplied.

The bit separation section 42 is formed using, for example, a 2-bit demultiplexer, and the O / E conversion section 4
One bit is sequentially taken out from the composite serial data DSZ from 1 and distributed alternately, and serial data DSA and DSB each having a bit transmission rate of 2.97 Gbps / 2 = 1.485 Gbps are individually formed. Thus, the serial data DSA and DSB obtained from the bit separation unit 42 are serial / parallel (S / P)
The signals are supplied to the conversion units 43 and 44, respectively.

In the S / P converter 43, the serial data DS having a bit transmission rate of 1.485 Gbps
A is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps / 2.
The 20-bit word string data DPA (20) with 0 = 74.25 MBps is reproduced. Also, the S / P converter 44
In this case, the serial data DSB having a bit transmission rate of 1.485 Gbps is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps / 20 = 74.25 MBps. The bit word string data DPB (20) is reproduced.

The 20-bit word string data DPA (20) and D
The PB (20) is supplied to the data reproduction processing unit 45.
In the data reproduction processing unit 45, the data processing unit 12 performs data processing on the 20-bit word string data DPA (20) and DPB (20), which is the reverse of the data processing performed on the data DVX in the data processing unit 12, Thereby, the data DVX based on the 20-bit word string data DPA (20) and DPB (20) is reproduced and supplied to the signal recording / reproducing unit 11. Data DV reproduced in this manner
X is the data DVA12, DVA1 shown in FIG.
4, DVA16, DVB10, DVB12, DVA10
+ DKA10 and DVB10 + DKB10. In the signal recording / reproducing unit 11, for example, data DVX is recorded by a built-in VTR.

The signal recording / reproducing unit 11 is also provided with a return data forming unit.
The return data DPM1 and DPM2, which are 20-bit word string data of ps, are transmitted.

The return data DPM1 obtained from the signal recording / reproducing unit 11 is supplied to the P / S converter 50.

The P / S conversion section 50 performs P / S conversion on the return data DPM1 to form serial data DSM1 having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps, and converts this to serial data DSM1. It is supplied to the E / O converter 51. The E / O converter 51 performs an electro-optical conversion process on the serial data DSM1.

The E / O converter 51 includes, for example, a laser driver 52 and a 1.3 μm-band Fabry-Perot (FP) laser diode 53 as shown in FIG. Then, the serial data DSM1 from the P / S converter 50 is supplied to the laser driver 52, and a laser drive signal SLR corresponding to the serial data DSM1 is obtained from the laser driver 52, and the laser drive signal SLR is supplied to the 1.3 μm band FP. It is supplied to the laser diode 53.

1.3 μm band FP laser diode 53
Oscillates in a multi-wavelength mode, and emits a laser beam having a wavelength spectrum of about 8 nm with a center wavelength of about 1.31 μm, for example, as shown in FIG. For example, it is about 0.4 nm / ° C. The 1.3 μm band FP laser diode 53 supplied with the laser drive signal SLR emits a 1.3 μm band laser beam having a center wavelength of approximately 1.31 μm in a state modulated by the laser drive signal SLR. , An optical signal OSM1 having a center wavelength of about 1.3 μm based on the serial data DSM1 and having a bit transmission rate of 1.485 Gbps.
This optical signal OSM1 is supplied to the bidirectional WDM coupler 32.

In the bidirectional WDM coupler 32,
The bit transmission rate from the E / O conversion unit 51 is 1.48.
An optical signal OSM1 having 5 Gbps and a center wavelength of approximately 1.3 μm is guided from the input / output terminal 40 shown in FIG. In the directional coupling unit 34, the optical signal OSM1 from the optical connector 39 through the optical fiber is transmitted to the optical connector 3 through the optical fiber formed by coupling the optical fiber from the optical connector 37 and the optical fiber from the optical connector 39.
Guided to 5. Accordingly, the optical signal OSM1 that has passed through the directional coupling unit 34 is led out to the input / output terminal 36 through the optical connector 35. In this way, the optical signal O led out to the input / output end 36 of the bidirectional WDM coupler 32
SM1 is guided to the optical connector 33.

Then, the optical signal OSM1 from the bidirectional WDM coupler 32 is transmitted from the other end to the optical signal transmission cable 31 through the optical connector 33, and from the other end to the one end of the optical signal transmission cable 31. It is transmitted and guided from one end to the bidirectional WDM coupler 19 through the optical connector 30.

In the bidirectional WDM coupler 19,
The bit transmission rate from the optical connector 30 is 1.485.
Gbps, and an optical signal O having a center wavelength of about 1.3 μm.
SM1 is guided from the input / output end 26 shown in FIG. In the directional coupler 20, the optical signal OSM1 from the optical connector 25 through the optical fiber is guided to the optical connector 23 through the branched optical fiber. Thus, the optical signal OSM1 that has passed through the directional coupling unit 20 is led out to the input / output terminal 24 through the optical connector 23. The optical signal OSM1 led to the input / output terminal 24 in this way is sent from the bidirectional WDM coupler 19 and guided to the O / E converter 54.

In the O / E converter 54, the bit transmission rate is set to 1.485 Gbps, and the center wavelength is set to about 1.3.
The optical signal OSM1 having a thickness of μm is subjected to photoelectric conversion processing, and the bit transmission rate based on the optical signal OSM1 is set to 1.485.
The serial data DSM1 at Gbps is reproduced. Then, the reproduced serial data DSM1 is supplied to the S / P converter 55.

In the S / P converter 55, the serial data DS having a bit transmission rate of 1.485 Gbps
M1 is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate based on the serial data DSM1 is 1.485 Gbps / 20 = 74.25 MB.
The return data DPM1, which is set to ps, is reproduced and supplied to the camera unit 10.

The return data DPM2 obtained from the signal recording / reproducing unit 11 is supplied to a P / S converter 56.

The P / S converter 56 performs P / S conversion on the return data DPM2 to form serial data DSM2 having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps, and converts the data into DSM2. It is supplied to the E / O converter 57. The E / O converter 57 performs an electro-optical conversion process on the serial data DSM2.

The E / O converter 57 has the same configuration as the E / O converter 51. The E / O converter 57 outputs an optical signal OSM2 having a center wavelength of approximately 1.3 μm based on the serial data DSM2. Bit rate of 1.485 Gbps
Is obtained. The optical signal OSM2 is sent from one end of the optical signal transmission cable 59 to the optical signal transmission cable 59 through the optical connector 58, is transmitted from one end to the other end of the optical signal transmission cable 59, and is transmitted through the optical connector 60 from the other end. / E conversion unit 61.

In the O / E converter 61, the bit transmission rate is set to 1.485 Gbps, and the center wavelength is set to about 1.3.
The optical signal OSM2 having a thickness of μm is subjected to photoelectric conversion processing, and the bit transmission rate based on the optical signal OSM2 is set to 1.485.
The serial data DSM2 having Gbps is reproduced. Then, the reproduced serial data DSM2 is supplied to the S / P converter 62.

In the S / P converter 62, the serial data DS having a bit transmission rate of 1.485 Gbps
M2 is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate based on the serial data DSM2 is 1.485 Gbps / 20 = 74.25 MB.
The return data DPM2, which is set to ps, is reproduced and supplied to the camera unit 10.

In the example shown in FIG. 1 as described above, the data DVX obtained from the camera section 10 is
DVA12, DVA14, DVA1 shown in FIG.
6, DVB10, DVB12, DVA10 + DKA10
The signal is converted into an optical signal OZ based on one of DVB10 + DKB10 and transmitted from the camera unit 10 to the signal recording / reproducing unit 11 through the optical signal transmission cable 31 and transmitted from the signal recording / reproducing unit 11. The return data DPM1 is converted into an optical signal OSM1 and transmitted from the signal recording / reproducing unit 11 to the optical signal transmission cable 31.
Return data DPM2 transmitted from the signal recording / reproducing unit 11 to the camera unit 10 through
The signal is converted into an optical signal OSM2, transmitted from the signal recording / reproducing unit 11 side to the camera unit 10 via the optical signal transmission cable 59, and transmitted through the optical signal transmission cables 31 and 59.
Bidirectional transmission of the optical signal OZ and the optical signals OSM1 and OSM2 is performed.

The data D obtained from the camera unit 10
Conversion of VX to optical signal OZ and return data DP
The conversion of M1 and DPM2 into optical signals OSM1 and OSM2 can be performed, for example, by utilizing existing circuit components used for serial transmission of digital video signals according to HD SDI.

FIGS. 20 and 21 show an example of the data transmission method according to the invention described in any one of claims 9 to 16 in the claims of the present application.
An example of a data transmission device according to the invention described in claim 31 of the claims of the present application will be shown.

In the example shown in FIGS. 20 and 21, between the camera section 70 and the signal recording / reproducing section 71, digital data forming the 720P signal or digital data forming the 720P signal and the additional information data sequence are used. It is assumed that bidirectional transmission between a certain key signal data sequence and return data is performed. Camera section 7
0 is configured and operates similarly to the camera unit 10 in the example shown in FIG. 1, and data DVX forming a 720P signal is transmitted from the camera unit 70 and supplied to the data processing unit 72.

Data DVX is the same as data DVA12, DVA shown in FIG. 35, as in the case of the example shown in FIG.
14, DVA16, DVB10, DVB12, DVA1
0 + DKA10 or DVB10 + DKB10.

The data processing section 72 is constructed and operates in the same manner as the data processing section 12 in the example shown in FIG. 20-bit word string data DPA (20) and DPB derived by the section 12
Two serial data, 2 similar to the set of (20)
0-bit word string data DPA (20) and DPB (2
0) is derived.

The 20-bit word string data DPA (20) having a word transmission rate of 74.25 MBps sent from the data processing section 72 is supplied to the P / S conversion section 73. The P / S conversion unit 73 performs P / S conversion on the 20-bit word string data DPA (20) to set the bit transmission rate based on the 20-bit word string data DPA (20) to 74.25 MBps × 20 = 1.485 Gbp
The serial data DSA is formed as s, and the serial data DSA is supplied to the E / O converter 74. The E / O conversion unit 74 is the E / O conversion unit 1 in the example shown in FIG.
6, and performs a light-to-light conversion process on the serial data DSA to reduce the bit transmission rate to 1.485 Gbps.
For example, an optical signal OZA having a center wavelength of about 1.55 μm is formed. Then, the E / O converter 74
Is supplied to the bidirectional WDM coupler 75.

The bidirectional WDM coupler 75 has the same configuration as the bidirectional WDM coupler 19 in the example shown in FIG. A third input / output end is provided on the side.
Then, in the bidirectional WDM coupler 75, E /
The optical signal OZA obtained from the O conversion unit 74 is supplied from the first input / output terminal and is led out to the third input / output terminal.

The optical signal OZA led to the third input / output terminal of the bidirectional WDM coupler 75 connects the third input / output terminal of the bidirectional WDM coupler 75 to one end of the optical signal transmission cable 77. The optical signal is transmitted to the optical signal transmission cable 77 from one end through the optical connector 76. The optical signal transmission cable 77 is formed of, for example, quartz-based SMF.

At the other end of the optical signal transmission cable 77, an optical connector 79 for connecting the optical signal transmission cable 77 to the bidirectional WDM coupler 78 is provided. Thereby, the optical connector 76
The optical signal OZA sent from one end of the optical signal transmission cable 77 to the optical signal transmission cable 77 is transmitted from one end to the other end of the optical signal transmission cable 77, and the bidirectional WDM coupler 78 is transmitted from the other end through the optical connector 79. It is led to.

The bidirectional WDM coupler 78 has the same configuration as the bidirectional WDM coupler 32 in the example shown in FIG. 1, and has first and second input / output terminals on one end and the other end. A third input / output end is provided on the side.
Then, in the bidirectional WDM coupler 78, the optical signal OZA through the optical connector 79 is supplied from the third input / output terminal and is led out to the second input / output terminal.

The optical signal OZA led to the second input / output terminal of the bidirectional WDM coupler 78 is led to the O / E converter 80. In the O / E converter 80, the bit transmission rate is set to 1.485 Gbps, and the center wavelength is set to about 1.5.
The optical signal OZA having a thickness of 5 μm is subjected to photoelectric conversion processing, and the bit transmission rate based on the optical signal OZA is set to 1.485 G.
The serial data DSA at bps is reproduced. Then, the reproduced serial data DSA is supplied to the S / P converter 81.

In the S / P converter 81, the serial data DS having a bit transmission rate of 1.485 Gbps
A is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps / 2.
The 20-bit word string data DPA (20) with 0 = 74.25 MBps is reproduced. 20-bit word string data DPA (20) reproduced in S / P conversion section 81
Is supplied to the data reproduction processing unit 82.

The 20-bit word string data DPB (20) having a word transmission rate of 74.25 MBps sent from the data processing section 72 is supplied to the P / S conversion section 83. The P / S converter 83 performs P / S conversion on the 20-bit word string data DPB (20),
The bit transmission rate based on the 20-bit word string data DPB (20) is set to 74.25 MBps × 20 = 1.485
The serial data DSB of Gbps is formed, and the serial data DSB is supplied to the E / O converter 84. E
The / O converter 84 is also configured in the same manner as the E / O converter 16 in the example shown in FIG.
The optical signal OZB having a center wavelength of about 1.55 μm, for example, is formed. Then, the optical signal OZB obtained from the E / O converter 84 is supplied to the bidirectional WDM coupler 85.

The bidirectional WDM coupler 85 has the same configuration as the bidirectional WDM coupler 19 in the example shown in FIG. 1 and has first and second input / output terminals on one end and the other end. A third input / output end is provided on the side.
In the bidirectional WDM coupler 85, E /
The optical signal OZB obtained from the O conversion unit 84 is supplied from the first input / output terminal and is led out to the third input / output terminal.

The optical signal OZB led out to the third input / output terminal of the bidirectional WDM coupler 85 connects the third input / output terminal of the bidirectional WDM coupler 85 to one end of the optical signal transmission cable 87. The optical signal is transmitted to the optical signal transmission cable 87 from one end through the optical connector 86. The optical signal transmission cable 87 is formed of, for example, quartz-based SMF.

At the other end of the optical signal transmission cable 87, an optical connector 89 for connecting the optical signal transmission cable 87 to a bidirectional WDM coupler 88 is provided. Thereby, the optical connector 86
The optical signal OZB transmitted from one end of the optical signal transmission cable 87 to the optical signal transmission cable 87 is transmitted from one end to the other end of the optical signal transmission cable 87, and the bidirectional WDM coupler 88 is transmitted from the other end through the optical connector 89. It is led to.

The bidirectional WDM coupler 88 has the same configuration as the bidirectional WDM coupler 32 in the example shown in FIG. A third input / output end is provided on the side.
Then, in the bidirectional WDM coupler 88, the optical signal OZB through the optical connector 89 is supplied from the third input / output terminal, and is led out to the second input / output terminal.

The optical signal OZB led to the second input / output terminal of the bidirectional WDM coupler 88 is led to the O / E converter 90. In the O / E converter 90, the bit transmission rate is set to 1.485 Gbps, and the center wavelength is set to about 1.5.
The optical signal OZB having a thickness of 5 μm is subjected to photoelectric conversion processing, and the bit transmission rate based on the optical signal OZB is set to 1.485 G.
The serial data DSB at bps is reproduced. Then, the reproduced serial data DSB is supplied to the S / P converter 91.

In the S / P converter 91, the serial data DS having a bit transmission rate of 1.485 Gbps
B is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps / 2.
The 20-bit word string data DPB (20) with 0 = 74.25 MBps is reproduced. 20-bit word string data DPB (20) reproduced in S / P conversion section 91
Is supplied to the data reproduction processing unit 82.

In the data reproduction processing section 82, the 20-bit word string data DPA (20) and DPB (20)
, The data processing unit 72 performs data processing opposite to the data processing performed on the data DVX.
The data DVX based on B (20) is reproduced and supplied to the signal recording / reproducing unit 71. The data DVX reproduced in this manner is the data DVA1 shown in FIG.
2, DVA14, DVA16, DVB10, DVB1
2, DVA10 + DKA10 and DVB10 + DKB1
It is set to one of 0. Then, in the signal recording / reproducing unit 71, for example, recording of the data DVX by the built-in VTR is performed.

The signal recording / reproducing unit 71 is also provided with a return data forming unit.
The return data DPMA and DPMB, which are 20-bit word string data of ps, are transmitted.

The return data DPMA obtained from the signal recording / reproducing section 71 is supplied to the P / S converter 95.

The P / S converter 95 performs P / S conversion on the return data DPMA to form serial data DSMA having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps, and converts the data into DSMA. It is supplied to the E / O converter 96. The E / O converter 96 is configured similarly to the E / O converter 51 in the example shown in FIG.
From the O conversion unit 96, based on the serial data DSMA,
An optical signal OSMA having a center wavelength of about 1.3 μm can be obtained with a bit transmission rate of 1.485 Gbps. This optical signal OSMA is transmitted to the bidirectional WDM coupler 7.
8 is supplied.

In the bidirectional WDM coupler 78,
The bit transmission rate from the E / O conversion unit 96 is calculated as follows:
An optical signal OSMA having 85 Gbps and having a center wavelength of approximately 1.3 μm is supplied from the first input / output terminal and is led out to the third input / output terminal. The optical signal OSMA led to the third input / output terminal of the bidirectional WDM coupler 78 is sent from the other end to the optical signal transmission cable 77 through the optical connector 79, and is sent from the other end of the optical signal transmission cable 77. The light is transmitted to one end, and guided from one end to the bidirectional WDM coupler 75 through the optical connector 76.

In the bidirectional WDM coupler 75,
The bit transmission rate through the optical connector 76 is 1.48.
An optical signal OSMA having 5 Gbps and having a center wavelength of about 1.3 μm is supplied from the third input / output terminal and is led out to the second input / output terminal. The optical signal OSMA guided to the second input / output terminal of the bidirectional WDM coupler 75 is guided to the O / E converter 97.

In the O / E converter 97, the bit transmission rate is set to 1.485 Gbps, and the center wavelength is set to about 1.3.
The optical signal OSMA having a thickness of μm is subjected to photoelectric conversion processing, and the bit transmission rate based on the optical signal OSMA is set to 1.485.
Gbps serial data DSMA is reproduced. Then, the reproduced serial data DSMA is supplied to the S / P converter 98.

In the S / P converter 98, the serial data DS having a bit transmission rate of 1.485 Gbps
The MA is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate is 1.485 Gbps / 20 = 74.25 MB based on the serial data DSMA.
The return data DPMA, which is set to ps, is reproduced and supplied to the camera unit 10.

The return data DPMB obtained from the signal recording / reproducing unit 71 is supplied to the P / S converter 99.

The P / S converter 99 performs P / S conversion on the return data DPMB to form serial data DSMB having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps, and converts the serial data DSMB into a serial data DSMB. It is supplied to the E / O converter 100. The E / O converter 100 is configured similarly to the E / O converter 51 in the example shown in FIG.
From the E / O converter 100, an optical signal OSMB having a center wavelength of about 1.3 μm based on the serial data DSMB
Is obtained with the bit transmission rate set to 1.485 Gbps. This optical signal OSMB is supplied to the bidirectional WDM coupler 88.

In the bidirectional WDM coupler 88,
The bit transmission rate from the E / O conversion unit 100 is expressed by Equation 1.
An optical signal OSMB having a wavelength of 485 Gbps and a center wavelength of approximately 1.3 μm is supplied from the first input / output terminal to the third optical signal OSMB.
To the input / output end of Bidirectional WDM coupler 88
The optical signal OSMB led out to the third input / output end of the optical signal transmission cable 87 is transmitted from the other end to the optical signal transmission cable 87 through the optical connector 89, and transmitted from the other end to the one end of the optical signal transmission cable 87. , From one end of the optical connector 86
Through to the bidirectional WDM coupler 85.

In the bidirectional WDM coupler 85,
The bit transmission rate through the optical connector 86 is 1.48.
An optical signal OSMB having 5 Gbps and having a center wavelength of approximately 1.3 μm is supplied from the third input / output terminal and is led out to the second input / output terminal. The optical signal OSMB guided to the second input / output terminal of the bidirectional WDM coupler 85 is guided to the O / E converter 101.

In the O / E converter 101, the bit transmission rate is set to 1.485 Gbps, and the center wavelength is set to approximately 1.85 Gbps.
The optical signal OSMB of 3 μm is subjected to photoelectric conversion processing,
The bit transmission rate based on the optical signal OSMB is 1.48.
The serial data DSMB of 5 Gbps is reproduced.
The reproduced serial data DSMB is stored in the S / P
The data is supplied to the conversion unit 102.

In the S / P converter 102, the serial data D having a bit transmission rate of 1.485 Gbps
The SMB is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate based on the serial data DSMB is set to 1.485 Gbps / 20 = 74.25M.
The return data DPMB, which is set to Bps, is reproduced and supplied to the camera unit 70.

In the examples shown in FIGS. 20 and 21 as described above, the data DVX obtained from the camera
Are the data DVA12, DVA14,
DVA16, DVB10, DVB12, DVA10 + D
Converted into optical signals OZA and OZB under any one of KA10 and DVB10 + DKB10,
Return data DPM transmitted from the signal recording / reproducing unit 71 to the signal recording / reproducing unit 71 via the optical signal transmission cables 77 and 87 from the camera unit 70 side.
A and DPMB are converted into optical signals OSMA and OSMB, and the optical signal transmission cable 7
The optical signal OZA transmitted through the optical signal transmission cables 77 and 87 to the camera unit 10 through
, OZB and optical signals OSMA and OSMB.

The data D obtained from the camera unit 70
Conversion of VX into optical signals OZA and OZB, and return signals DPMA and DPMB on optical signals OSMA and OZB
Conversion to SMB is performed, for example, by converting a digital video signal to HD
This can be done using existing circuit components used for serial transmission according to SDI.

FIG. 22 is a block diagram showing an embodiment of a data transmission method according to the present invention described in any one of claims 17 to 24 of the present invention. An example of a data transmission device according to the invention described in Item 32 is shown.

In the example shown in FIG. 22, 720 between the camera unit 110 and the signal recording / reproducing unit 111
The bidirectional transmission of digital data forming a P signal or digital data forming a 720P signal and a key signal data sequence, which is an additional information data sequence, and return data is performed. The camera unit 110 is configured and operates in the same manner as the camera unit 10 in the example shown in FIG. 1, and data DVX forming a 720P signal is transmitted from the camera unit 110 and the data DVX is transmitted to the data processing unit 11.
2 is supplied.

Data DVX is the same as data DVA12, DVA shown in FIG. 35, as in the case of the example shown in FIG.
14, DVA16, DVB10, DVB12, DVA1
0 + DKA10 or DVB10 + DKB10.

The data processing section 112 has the same configuration and operates in the same manner as the data processing section 12 in the example shown in FIG. 1, and performs the data processing in the example shown in FIG. 1 based on the data DVX from the camera section 110. 20-bit word string data DPA (20) and DP derived by the section 12
B (20), two 20-bit word string data DPA (20) and DPB which are two serial data
(20) is derived.

The 20-bit word string data DPA (20) having a word transmission rate of 74.25 MBps sent from the data processing unit 112 is supplied to the P / S conversion unit 113. The P / S converter 113 performs P / S conversion on the 20-bit word string data DPA (20),
The bit transmission rate based on the 20-bit word string data DPA (20) is set to 74.25 MBps × 20 = 1.485
The serial data DSA of Gbps is formed, and the serial data DSA is supplied to the E / O converter 114.
The E / O conversion unit 114 is configured to control the E / O conversion in the example shown in FIG.
The configuration is the same as that of the O conversion unit 16, and the serial data DSA
Is subjected to light-to-light conversion processing to increase the bit transmission rate to 1.48.
An optical signal OZA having a center wavelength of, for example, about 1.55 μm at 5 Gbps is formed. And E / O
The optical signal OZA obtained from the conversion unit 114 is
5 is supplied.

The 20-bit word string data DPB (20) having a word transmission rate of 74.25 MBps sent from the data processing unit 112 is supplied to the P / S conversion unit 116. The P / S converter 116 performs P / S conversion on the 20-bit word string data DPB (20),
The bit transmission rate based on the 20-bit word string data DPB (20) is set to 74.25 MBps × 20 = 1.485
The serial data DSB having Gbps is formed, and the serial data DSB is supplied to the E / O converter 117.
The E / O conversion unit 117 is configured to control the E / O
The configuration is the same as that of the O conversion unit 51, and the serial data DSB
Is subjected to light-to-light conversion processing to increase the bit transmission rate to 1.48.
An optical signal OZB having a center wavelength of about 1.3 μm, for example, of 5 Gbps is formed. Then, the optical signal OZB obtained from the E / O conversion unit 117 is
Supplied to

The multiplexing section 115 has an optical signal OZA having a center wavelength of about 1.55 μm obtained from the E / O conversion section 114 and about 1.3 μm obtained from the E / O conversion section 117. Multiplexed with the optical signal OZB having the center wavelength, which is expressed as follows. The multiplexed optical signal OZAB obtained from the multiplexing section 115 is transmitted through the optical connector 118 connecting the multiplexing section 115 and one end of the optical signal transmission cable 177 to the optical signal transmission cable 17.
7 from one end thereof. Optical signal transmission cable 1
77 is, for example, formed of quartz-based SMF.

At the other end of the optical signal transmission cable 177,
An optical connector 179 is provided to connect it to the branching unit 178. As a result, the multiplexed optical signal OZAB sent from one end to the optical signal transmission cable 177 through the optical connector 118 is transmitted from one end to the other end of the optical signal transmission cable 177, and the optical connector 179 is sent from the other end. The light is guided to the demultiplexing unit 178 through.

The splitter 178 splits the multiplexed optical signal OZAB through the optical connector 179, and derives the optical signal OZA and the optical signal OZB in a state where they are separated from each other.

Optical signal OZA obtained from splitter 178
Is led to the O / E converter 180. O / E converter 1
80, the bit transmission rate is 1.485 Gbp
s and an optical signal OZA having a center wavelength of about 1.55 μm.
Is subjected to photoelectric conversion processing to reproduce serial data DSA having a bit transmission rate of 1.485 Gbps based on the optical signal OZA. Then, the reproduced serial data DSA is supplied to the S / P converter 181.

In the S / P converter 181, the serial data D with a bit transmission rate of 1.485 Gbps
The SA is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps /.
20-bit word string data DPA (20) with 20 = 74.25 MBps is reproduced. 20-bit word string data DPA (2) reproduced in S / P conversion section 181
0) is supplied to the data reproduction processing unit 182.

The optical signal O obtained from the demultiplexing unit 178
ZB is guided to the O / E conversion unit 183. In the O / E converter 183, the bit transmission rate is set to 1.485G.
b. Optical signal OZ having a center wavelength of approximately 1.3 μm.
B is subjected to photoelectric conversion processing to reproduce serial data DSB having a bit transmission rate of 1.485 Gbps based on the optical signal OZB. Then, the reproduced serial data DSB is supplied to the S / P converter 184.

In the S / P conversion section 184, the serial data D having a bit transmission rate of 1.485 Gbps
The SB is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps /.
20-bit word string data DPB (20) with 20 = 74.25 MBps is reproduced. 20-bit word string data DPB (2) reproduced in S / P conversion section 184
0) is supplied to the data reproduction processing unit 182.

In the data reproduction processing section 182, 20
Bit word string data DPA (20) and DPB (2
0) in the data processing unit 112.
X is subjected to data processing reverse to the data processing performed on X, thereby reproducing data DVX based on the 20-bit word string data DPA (20) and DPB (20), Supply. The data DVX reproduced in this manner corresponds to the data DX shown in FIG.
VA12, DVA14, DVA16, DVB10, DV
B12, DVA10 + DKA10 and DVB10 + DK
B10. Then, in the signal recording / reproducing unit 111, for example, recording of the data DVX by the built-in VTR is performed.

The signal recording / reproducing section 111 is also provided with a return data forming section. For example, each of the return data forming sections has a word transmission rate of 74.25 MB.
The return data DPM, which is 20-bit word string data of ps, is transmitted.

The return data DPM obtained from the signal recording / reproducing unit 111 is supplied to a P / S converter 185.

The P / S converter 185 performs P / S conversion on the return data DPM to form serial data DSM having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps, and converts the data into DSM. It is supplied to the E / O converter 186. The E / O converter 186 is configured similarly to the E / O converter 51 in the example shown in FIG.
An optical signal OSM having a center wavelength of approximately 1.3 μm based on the serial data DSM is obtained from the / O conversion unit 186 at a bit transmission rate of 1.485 Gbps. The optical signal OSM is transmitted from the other end to the optical signal transmission cable 189 through the optical connector 187, and transmitted from the other end to the one end of the optical signal transmission cable 189.

The optical signal OSM transmitted from the other end to the one end of the optical signal transmission cable 189 is transmitted to the optical connector 1.
The signal is guided to the O / E converter 191 through 90. O / E
The conversion unit 191 sets the bit transmission rate to 1.48.
An optical signal OSM having a center wavelength of approximately 1.3 μm is subjected to photoelectric conversion processing at 5 Gbps to reproduce serial data DSM having a bit transmission rate of 1.485 Gbps based on the optical signal OSM. Then, the reproduced serial data DSM is supplied to the S / P converter 192.

In the S / P converter 192, the serial data D having a bit transmission rate of 1.485 Gbps
The SM is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate based on the serial data DSM is set to 1.485 Gbps / 20 = 74.25 MBp
The return data DPM, which is denoted by s, is reproduced and supplied to the camera unit 110.

In the example shown in FIG. 22 as described above, the data DVX obtained from the camera unit 110 is
5, data DVA12, DVA14, DVA1
6, DVB10, DVB12, DVA10 + DKA10
And the return signal DPM sent from the signal recording / reproducing unit 111 is converted into an optical signal OSM, and the camera unit 110 converts the return signal DPM into an optical signal OSM.
And the signal recording / reproducing unit 111 perform bidirectional transmission of the signals via the optical signal transmission cables 177 and 189.

The conversion of the data DVX obtained from the camera unit 110 into the optical signals OZA and OZB and the conversion of the return data DPM into the optical signal OSM are performed, for example, as follows.
This can be achieved using existing circuit components used for serial transmission of digital video signals in accordance with HD SDI.

FIG. 23 and FIG. 24 are diagrams showing an example of a data transmission method according to the invention described in any one of claims 25 to 29 in the claims of the present application. An example of the data transmission device according to the invention described in claim 33 in the scope is shown.

In the example shown in FIGS. 23 and 24, the digital data forming the 720P signal or the digital data forming the 720P signal and the additional information data sequence between the camera unit 200 and the signal recording / reproducing unit 201 are provided. It is assumed that bidirectional transmission between a certain key signal data sequence and return data is performed. Data DVX forming a 720P signal is transmitted from the camera unit 200 and supplied to the data processing unit 202.

The data DVX forms a 720P signal in a 4: 2: 2: 4 format in which the number of quantization bits is 12 bits, 14 bits, or 16 bits, which is shown as data DVA12 + DKA12, DVA14 + DKA14 or data DVA16 + DKA16 in FIG. Digital data or data D in FIG.
The digital data is represented as VB12 + DKB12 and constitutes a 4: 4: 4: 4 format 720P signal having a quantization bit number of 12 bits.

If the data DVX is the data DVA12 + DKA12 shown in FIG. 35 as 4: 2: 2: 4 format data with the quantization bit number being 12 bits, the data DVA12 + DKA12 is as shown in FIG. In addition, a Y data sequence and a P _B / P which form a 720P signal in 4: 2: 2 format, each having a quantization bit number of 12 bits and a word transmission rate of 74.25 MBps,
_{An R} data sequence (DVA12) and a Key signal data sequence (DKA12) having a data format equivalent to that of the Y data sequence, a quantization bit number of 12 bits and a word transmission rate of 74.25 MBps are used for frame synchronization and The word transmission rate, which is parallel data obtained by parallel multiplexing under line synchronization, is 7
The data is supplied to the data processing unit 202 as 36-bit word string data of 4.25 MBps.

In the data processing section 202, the data DVA12 + DK supplied as shown in FIG.
The following processing is performed on A12.

First, as shown in FIG. 25, 12-bit words YD0, YD1, YD constituting a Y data sequence
2, YD3, ·····, 12-bit words constituting the P _B / P _R data sequence PbD0, PrD0, PbD1,
PrD1, PbD2, PrD2,..., And K
12-bit word AD constituting the ey signal data sequence
Each of 0, AD1, AD2, AD3,... Is represented by upper 10 bits Y0; 2-11, Y1; 2-11, Y2;
2-11, Y3; 2-11,..., Pb0;
11, Pr0; 2-11, Pb1; 2-11, Pr1;
2-11, Pb2; 2-11, Pr2; 2-11,.
... and A0; 2-11, A1; 2-11, A
2; 2-11, A3; 2-11,...
Bits Y0; 0-1, Y1; 0-1, Y2; 0-1, Y
, Pb0; 0-1, Pr0; 0
-1, Pb1; 0-1, Pr1; 0-1, Pb2; 0-
1, Pr2; 0-1,..., And A0; 0-1
A1: 0-1, A2; 0-1, A3; 0-1, ...
・ ・ Divided into

Then, the divided upper 10-bit sequence:
Y0; 2-11, Y1; 2-11, Y2; 2-11, Y
3; 2-11,..., And a sequence of the upper 10 bits divided: Pb0; 2-11, Pr0; 2-11, Pb
1; 2-11, Pr1; 2-11, Pb2; 2-11,
, Pr2; 2-11,.
The 20-bit word string data DVC12A having a word transmission rate of 74.25 MBps is formed as a link A as shown in FIG.

Further, the divided lower two bits Y0;
1, Y1; 0-1, Y2; 0-1, Y3; 0-1,.
..., the 8-bit auxiliary bits c0, c1, c2, c
, And add 10 bits [Y0; 0-
1] + c0, [Y1; 0-1] + c1, [Y2; 0-
1] + c2, [Y3; 0-1] + c3,... And the lower two bits Pb0;
Pr0; 0-1, Pb1; 0-1, Pr1; 0-1, P
b2; 0-1, Pr2; 2-1,..., and 8-bit auxiliary bits d0, d1, d2, d3,. ] + D0,
[Pr0; 0-1] + d1, [Pb1; 0-1] + d
2, [Pr1; 0-1] + d3, [Pb2; 0-1] +
d4, [Pr2; 0-1] + d5,...
And a 10-bit string: [Y0; 0-1] + c0,
[Y1; 0-1] + c1, [Y2; 0-1] + c2
[Y3; 0-1] + c3,... And a 10-bit string: [Pb0; 0-1] + d0, [Pr0; 0-1] +
d1, [Pb1; 0-1] + d2, [Pr1; 0-1]
+ D3, [Pb2; 0-1] + d4, [Pr2; 0-
.. Are formed in parallel to form 20-bit word string data DVC12B having a word transmission rate of 74.25 MBps as a link B as shown in FIG.

Further, the divided lower two bits A0; 0
-1, A1; 0-1, A2; 0-1, A3; 0-1,.
.., And 8 auxiliary bits e0, e1, e2
... are added to each other and 10 bits [A0; 0
-1] + e0, [A1; 0-1] + e1, [A2; 0-
1] + e2, [A3; 0-1] + e3,..., And a sequence of the divided upper 10 bits: A0;
A1; 2-11, A2; 2-11, A3; 2-11,.
... and a 10-bit string: [A0; 0-1] + e
0, [A1; 0-1] + e1, [A2; 0-1] + e
, [A3; 0-1] + e3,... Are parallel-multiplexed, and 20-bit word string data DVC12C having a word transmission rate of 74.25 MBps is linked to link C.
26C is formed as shown in FIG.

That is, the word transmission rate is set to 74.25 MB.
As shown in FIG. 26, data DVA12 + DKA12 forming 36-bit word string data having ps is set to 20 with a word transmission rate of 74.25 MBps as shown in FIG.
Bit word string data DVC12A, DVC12B, and DVC12C are converted into three types of word string data.

In the data processing unit 202, the data DVA12 supplied as shown in FIG.
The following processing is performed on + DKA12 as another processing instead of the above processing.

First, as shown in FIG. 25, 12-bit words YD0, YD1, YD constituting a Y data sequence
2, YD3, ·····, 12-bit words constituting the P _B / P _R data sequence PbD0, PrD0, PbD1,
PrD1, PbD2, PrD2,..., And K
12-bit word AD constituting the ey signal data sequence
Each of 0, AD1, AD2, AD3,... Is represented by upper 10 bits Y0; 2-11, Y1; 2-11, Y2;
2-11, Y3; 2-11,..., Pb0;
11, Pr0; 2-11, Pb1; 2-11, Pr1;
2-11, Pb2; 2-11, Pr2; 2-11,.
... and A0; 2-11, A1; 2-11, A
2; 2-11, A3; 2-11,...
Bit Y0; 0-1 Y1; 0-1, Y2; 0-1, Y
, Pb0; 0-1, Pr0; 0
-1, Pb1; 0-1, Pr1; 0-1, Pb2; 0-
1, Pr2; 0-1,..., And A0; 0-1
A1: 0-1, A2; 0-1, A3; 0-1, ...
・ ・ Divided into

Then, the divided upper 10-bit sequence:
Y0; 2-11, Y1; 2-11, Y2; 2-11, Y
3; 2-11,..., The upper 10-bit sequence: Pb0; 2-11, Pr0; 2-11, Pb1;
2-11, Pr1; 2-11, Pb2; 2-11, Pr
.. Are parallel-multiplexed, and 20-bit word string data DVC12A having a word transmission rate of 74.25 MBps is used as link A in FIG.
A is formed as shown in A.

The lower two bits Y0; 0-
1 and Pb0; 0-1 and Pr0; 0-1 are multiplexed and 10-bit [Y0BR0; 0-1] + d0 obtained by adding 4-bit auxiliary bit d0, divided lower 2 bits Y1; 0 -1 to 8-bit auxiliary bit e0
[Y1; 0-1] + e0,
Lower two bits Y2; 0-1 and Pb1; 0-1
And Pr1; 0-1 are multiplexed and 10-bit [Y2B] obtained by adding 4-bit auxiliary bit d1
R1; 0-1] + d1, the divided lower two bits Y3;
1 obtained by adding 8-bit auxiliary bit e1 to 0-1
0 bits [Y3; 0-1] + e1, divided lower 2 bits Y4; 0-1 and Pb2; 0-1 and Pr2; 0-1 are multiplexed, and 4-bit auxiliary bit d2 is added. 10 bits [Y4BR2; 0-1] + d
2. 10 bits obtained by adding an 8-bit auxiliary bit e2 to the lower 2 bits Y5; 0-1 divided [Y5; 0
-1] + e2,... The 10-bit sequence thus obtained and the auxiliary 10-bit word α
D0, αD1, αD2, αD3,... Are multiplexed in parallel, and 20-bit word string data DVC12B having a word transmission rate of 74.25 MBps is used as a link B as shown in FIG. Form.

Further, the divided lower two bits A0; 0
-1, A1; 0-1, A2; 0-1, A3; 0-1,.
.., And 8 auxiliary bits e0, e1, e2
... are added to each other and 10 bits [A0; 0
-1] + e0, [A1; 0-1] + e1, [A2; 0-
1] + e2, [A3; 0-1] + e3,..., And a sequence of the divided upper 10 bits: A0;
A1; 2-11, A2; 2-11, A3; 2-11,.
... and a 10-bit string: [A0; 0-1] + e
0, [A1; 0-1] + e1, [A2; 0-1] + e
, [A3; 0-1] + e3,... Are parallel-multiplexed, and 20-bit word string data DVC12C having a word transmission rate of 74.25 MBps is linked to link C.
As shown in FIG. 27C.

That is, also in this case, as shown in FIG. 27, each of the data DVA12 + DKA12 forming 36-bit word string data having a word transmission rate of 74.25 MBps has a word transmission rate of 74.25Mps.
Bps, 20-bit word string data DVC12A,
The data is converted into three-system word string data of DVC12B and DVC12C.

Data DVX is data DVA14 + DKA shown in FIG. 35 as 4: 2: 2: 4 format data with a quantization bit number of 14 bits or 16 bits.
14 or the data DVA16 + DKA16, the data DVA14 + DKA14 or DVA1
The 6 + DKA 16 forms a 720P signal in 4: 2: 2 format, each of which has a quantization bit number of 14 bits or 16 bits and a word transmission rate of 74.25 MBps and a Y data sequence and a P _B / P _R data sequence ( DVA14
DVA16) and a data format equivalent to that of the Y data series, with a quantization bit number of 14 bits or 16 bits and a word transmission rate of 74.25M.
42-bit word string data with a word transmission rate of 74.25 MBps, which is parallel data obtained by parallel multiplexing a Key signal data sequence (DKA14 or DKA16) with Bps with frame synchronization and line synchronization. Alternatively, the data is supplied to the data processing unit 202 as 48-bit word string data.

In this case as well, the data processing unit 202 outputs the data DVA14 + DKA14 or DVA16 + DK
A16 is subjected to the same processing as that for the data DVA12 + DKA12. However, Y data series, P _B
/ P and _R data series and each of 12-bit words constituting the Key signal data sequence s, instead of the operation is divided into upper 10 bits and lower 2 bits, Y data sequence, P _B /
1 constituting the P _R data sequence and Key signal data sequence
The operation of dividing each 4-bit word into upper 10 bits and lower 4 bits, or Y data series, P _B /
1 constituting the P _R data sequence and Key signal data sequence
An operation of dividing each of the 6-bit words into upper 10 bits and lower 6 bits is performed.

The word transmission rate is set to 74.25M.
Data DVA14 + DK forming 42-bit word string data or 48-bit word string data at Bps
A14 or DVA16 + DKA16 is converted to 20-bit word string data DVC14A or DVC16A, DV each having a word transmission rate of 74.25 MBps.
The data is converted into word string data of three systems of C14B or DVC16B and DVC14C or DVC16C.

If the data DVX is the data DVB12 + DKB12 shown in FIG. 35 as 4: 4: 4: 4 format data with the quantization bit number being 12 bits, the data DVB12 + DKB12 is as shown in FIG. A G data sequence, a B data sequence, and an R data sequence (DVB12) that form 720P signals in 4: 4: 4 format, each having a quantization bit number of 12 bits and a word transmission rate of 74.25 MBps; It has the same data format as the G data series, and has a quantization bit number of 1
Word transmission rate of 74.25 MBps as 2 bits
The key signal data sequence (DKB12) is parallel data obtained by performing parallel multiplexing under the condition of frame synchronization and line synchronization, and is a 48-bit word string data having a word transmission rate of 74.25 MBps. It is supplied to the processing unit 202.

In the data processing section 202, the data DVB12 + DK supplied as shown in FIG.
The following processing is performed on B12.

First, as shown in FIG. 28, 12-bit words GD0, GD1, GD constituting a G data sequence
2, GD3,..., Constituting the B data series 12
Bit words BD0, BD1, BD2, BD3,...
.., 12-bit word RD constituting R data sequence
0, RD1, RD2, RD3,..., And Ke
12-bit words AD0,
Each of AD1, AD2, AD3,.
0 bit G0; 2-11, G1; 2-11, G2; 2-
11, G3; 2-11,..., B0;
B1; 2-11, B2; 2-11, B3; 2-11,.
..., R0; 2-11, R1; 2-11, R2; 2
-11, R3; 2-11,..., And A0;
-11, A1; 2-11, A2; 2-11, A3; 2-
... And lower two bits G0; 0-1, G
1; 0-1, G2; 0-1, G3; 0-1, ...
·, B0; 0-1, B1; 0-1, B2; 0-1, B
3; 0-1,..., R0; 0-1, R1;
1, R2; 0-1, R3; 0-1, ..., and
A0; 0-1, A1; 0-1, A2; 0-1, A3; 0
-1,...

Next, the divided lower two bits G0;
1, G1; 0-1, G2; 0-1, G3; 0-1,.
..., B0; 0-1, B1; 0-1, B2; 0-1,
B3; 0-1,..., R0; 0-1, R1;
1, R2; 0-1, R3; 0-1,..., G0; 0-1 and B0; 0-1 and R0; 10 bits [GBR0: 0-1] obtained by adding the bit f0 + f0, G
1; 0-1 and B1; 10-bit [GBR1: 0-1] + f1, G2; 0 obtained by multiplexing bits 0-1 and R1; 0-1 and adding 4-bit auxiliary bits f1
-1 and B2; 0-1 and R2; 0-1 are obtained by bit multiplexing and adding a 4-bit auxiliary bit f2.
0-bit [GBR2: 0-1] + f2, G3; 10-bit [GBR3: obtained by multiplexing 0-1 and B3; 0-1 and R3; 0-1 and adding 4-bit auxiliary bit f3; 0-1] + f3,...

Subsequently, as shown in FIG. 29, a sequence of the divided upper 10 bits: G0; 2-11, G1;
11, G2; 2-11, G3; 2-11,.
B0; 2-11, B1; 2-11, B2; 2-11, B
3; 2-11,..., And R0; 2-11, R
1; 2-11, R2; 2-11, R3; 2-11,.
... and a formed 10-bit string: [GBR0: 0
-1] + f0, [GBR1: 0-1] + f1, [GBR
2: 0-1] + f2, [GBR3: 0-1] + f3,
.. Are divided as indicated by the bold solid line in FIG. 29, and the divided upper 10-bit sequence: G
0; 2-11, G1; 2-11, G2; 2-11, G
3; 2-11,... And the upper 10 bits divided: B0; 2-11, B2; 2-11, B4;
1,..., And R0; 2-11, R2; 2-1
1, R4; 2-11,..., And the upper 10 bits divided: B1;
2-11, B3; 2-11, B5; 2-11, ...
-And R1; 2-11, R3; 2-11, R5; 2-1
..., a formed 10-bit string: [GB
R0: 0-1] + f0, [GBR1: 0-1] + f1,
[GBR2: 0-1] + f2, [GBR3: 0-1] +
10-bit word group 2 including f3,.
And sort it out.

The word transmission rate is set to 74.25 based on the 10-bit word group 1 shown in FIG.
20-bit word string data DVD12A with MBps
Is formed as a link A as shown in FIG. 30A, and the word transmission rate is 74.25 MBp based on the 10-bit word group 2 shown in FIG.
The 20-bit word string data DVD 12B as s is formed as a link B as shown in FIG.

Further, the divided lower two bits A0; 0
-1, A1; 0-1, A2; 0-1, A3; 0-1,.
.., And 8 auxiliary bits e0, e1, e2
... are added to each other and 10 bits [A0; 0
-1] + e0, [A1; 0-1] + e1, [A2; 0-
1] + e2, [A3; 0-1] + e3,..., And a sequence of the divided upper 10 bits: A0;
A1; 2-11, A2; 2-11, A3; 2-11,.
... and a 10-bit string: [A0; 0-1] + e
0, [A1; 0-1] + e1, [A2; 0-1] + e
, [A3; 0-1] + e3,..., And a 20-bit word string data DVD12C having a word transmission rate of 74.25 MBps
30C is formed as shown in FIG.

That is, the word transmission rate is set to 74.25 MB.
The data DVB12 + DKB12 forming the 48-bit word string data at ps are converted to 20-bit word string data D at a word transmission rate of 74.25 MBps.
The data is converted into three-system word string data of VD12A, DVD12B and DVD12C.

The data processing unit 202 sets the word transmission rate obtained as described above to 74.25 MBps.
A set of bit word string data DVC12A, DVC12B and DVC12C, and a word transmission rate of 74.25 MB
20 bits word string data DVC14A, D
A set of VC14B and DVC14C, 20-bit word string data D having a word transmission rate of 74.25 MBps
A set of VC16A, DVC16B and DVC16C, and a word transmission rate of 74.25 MBps 20
Any one of the sets of the bit word string data DVD12A, DVD12B and DVD12C is transferred to the 20-bit word string data DPA (20), DPB (20) and DPC (2
0).

20-bit word string data DPA (20) having a word transmission rate of 74.25 MBps sent from data processing section 202 is supplied to P / S conversion section 203. The P / S converter 203 performs P / S conversion on the 20-bit word string data DPA (20),
The bit transmission rate based on the 20-bit word string data DPA (20) is set to 74.25 MBps × 20 = 1.485
It forms serial data DSA of Gbps and supplies the serial data DSA to the bit multiplexing unit 204.

On the other hand, 20-bit word string data DPB (20) having a word transmission rate of 74.25 MBps sent from data processing section 202 is supplied to P / S conversion section 20.
5 is supplied. In the P / S converter 205, 20
P / S conversion is performed on the bit word string data DPB (20), and the bit transmission rate based on the 20-bit word string data DPB (20) is set to 74.25 MBps × 20 = 1.
Forming serial data DSB of 485 Gbps,
The serial data DSB is supplied to the bit multiplexing unit 204.

The bit multiplexing section 204 is configured using, for example, a 2-bit multiplexer, and the P / S conversion section 2
03 from the serial data DSA and P / S converter 20
5 is alternately taken out from each of the serial data DSBs from No. 5 and a bit multiplexing / combining process is performed on the serial data DSA and DSB to set the bit transmission rate to 1.485 Gbps × 2 = 2.97 Gbps. The serial data DSZ is formed. Thus, the composite serial data DSZ obtained from the bit multiplexing unit 204 is supplied to the E / O conversion unit 206. E / O
The conversion unit 206 is configured similarly to the E / O conversion unit 16 in the example shown in FIG. 1, performs an electro-optical conversion process on the composite serial data DSZ, and sets the bit transmission rate to 2.97 G.
An optical signal OZ having a center wavelength of about 1.55 μm, for example, is formed.

The bit transmission rate obtained from E / O conversion section 206 is 2.97 Gbps, and the center wavelength is approximately 1.97 Gbps.
The optical signal OZ of 55 μm is supplied to the bidirectional WDM coupler 207. Bidirectional WDM coupler 207
Has the same configuration as the bidirectional WDM coupler 19 in the example shown in FIG. 1, and has first and second input / output terminals at one end and a third input / output terminal at the other end. Provided.

In the bidirectional WDM coupler 207, the optical signal OZ from the E / O converter 206 is supplied from the first input / output terminal and is led out to the third input / output terminal. The optical signal OZ led to the third input / output terminal of the bidirectional WDM coupler 207 is led to the optical connector 208.

The optical connector 208 connects the bidirectional WDM coupler 207 and one end of the optical signal transmission cable 209. Thereby, the bidirectional WDM coupler 20
The optical signal OZ from 7 is transmitted to the optical signal transmission cable 209 through the optical connector 208 from one end thereof. The optical signal transmission cable 209 is formed of, for example, quartz-based SMF.

At the other end of the optical signal transmission cable 209,
An optical connector 211 is provided to connect the optical connector 211 to the bidirectional WDM coupler 210. As a result, the optical signal OZ transmitted from one end to the optical signal transmission cable 209 via the optical connector 208 is
09 from one end to the other end, and from the other end through the optical connector 211.
Guided to zero.

The bidirectional WDM coupler 210 has the same configuration as the bidirectional WDM coupler 32 in the example shown in FIG. 1, and has first and second input / output terminals on one end and the other end. A third input / output end is provided on the side.

In the bidirectional WDM coupler 210, the optical signal OZ through the optical connector 211 is supplied from the third input / output terminal and is led out to the second input / output terminal. The optical signal OZ led to the second input / output terminal of the bidirectional WDM coupler 210 is led to the O / E converter 212.

In the O / E converter 212, the bit transmission rate is set to 2.97 Gbps, and the center wavelength is set to approximately 1.5.
An optical signal OZ having a thickness of 5 μm is subjected to a photoelectric conversion process, and a bit transmission rate based on the optical signal OZ is set to 2.97 Gbps.
Is reproduced. And
The reproduced composite serial data DSZ is supplied to the bit separation unit 213.

The bit separation section 213 is constituted by using, for example, a 2-bit demultiplexer, and sequentially takes out one bit from the composite serial data DSZ from the O / E conversion section 212 and distributes the bits one by one. Serial data DSA and DSB having a transmission rate of 2.97 Gbps / 2 = 1.485 Gbps are individually formed. Thus, the serial data DSA and DSB obtained from the bit separation unit 213 are supplied to the S / P conversion units 214 and 215, respectively.

In S / P conversion section 214, serial data D having a bit transmission rate of 1.485 Gbps
The SA is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps /.
20-bit word string data DPA (20) with 20 = 74.25 MBps is reproduced. S / P converter 2
15, the bit transmission rate is 1.485 Gbp
The S / P conversion for forming 20-bit parallel data is performed on the serial data DSB as s to reproduce 20-bit word string data DPB (20) having a word transmission rate of 1.485 Gbps / 20 = 74.25 MBps. .

The 20-bit word string data DPA (20) and DPB (20) reproduced by the S / P converters 214 and 215, respectively, are supplied to a data reproduction processor 216.

The 20-bit word string data DPC (20) having a word transmission rate of 74.25 MBps sent from the data processing section 202 is supplied to the P / S conversion section 22.
0 is supplied. In the P / S converter 220, 20
P / S conversion is performed on the bit word string data DPC (20), and the bit transmission rate based on the 20-bit word string data DPC (20) is set to 74.25 MBps × 20 = 1.
485 Gbps serial data DSC is formed,
The serial data DSC is supplied to the E / O converter 221.

The E / O conversion section 221 is also configured in the same manner as the E / O conversion section 16 in the example shown in FIG. 1 and performs electro-optical conversion processing on the serial data DSC to set the bit transmission rate to 1.485 Gbps. For example, approximately 1.55 μm
The optical signal OZC having the center wavelength is formed.

An optical signal OZC having a bit transmission rate of 1.485 Gbps and a center wavelength of about 1.55 μm obtained from the E / O conversion unit 221 is supplied to the bidirectional WDM coupler 222. Bidirectional WDM coupler 2
22 has the same configuration as the bidirectional WDM coupler 19 in the example shown in FIG. 1, and has first and second input / output terminals at one end and a third input / output terminal at the other end. Is provided.

In the bidirectional WDM coupler 222, the optical signal OZC from the E / O converter 221 is supplied from the first input / output terminal and is led out to the third input / output terminal.
The optical signal OZC led to the third input / output terminal of the bidirectional WDM coupler 222 is led to the optical connector 223.

The optical connector 223 connects the bidirectional WDM coupler 222 and one end of the optical signal transmission cable 224. Thereby, the bidirectional WDM coupler 22
The optical signal OZC from the optical connector 2 is transmitted to the optical signal transmission cable 224 through the optical connector 223 from one end thereof.
The optical signal transmission cable 224 is formed of, for example, quartz-based SMF.

At the other end of the optical signal transmission cable 224,
An optical connector 226 is provided to connect the optical connector 226 to the bidirectional WDM coupler 225. As a result, the optical signal OZC transmitted from one end to the optical signal transmission cable 224 through the optical connector 223 is transmitted from one end to the other end of the optical signal transmission cable 224, and from the other end through the optical connector 226. Bidirectional WDM coupler 2
It is led to 25.

The bidirectional WDM coupler 225 has the same configuration as the bidirectional WDM coupler 32 in the example shown in FIG. 1, and has first and second input / output terminals on one end and the other end. A third input / output end is provided on the side.

In the bidirectional WDM coupler 225, the optical signal OZC through the optical connector 226 is supplied from the third input / output terminal and is led out to the second input / output terminal.
The optical signal OZC led to the second input / output terminal of the bidirectional WDM coupler 225 is led to the O / E converter 227.

In the O / E converter 227, the bit transmission rate is 1.485 Gbps, and the center wavelength is approximately 1.
By subjecting the optical signal OZC to 55 μm to photoelectric conversion processing,
The bit transmission rate based on the optical signal OZC is 1.485.
Gbps serial data DSC is reproduced. Then, the reproduced serial data DSC is supplied to the S / P converter 228.

In the S / P converter 228, the serial data D having a bit transmission rate of 1.485 Gbps
The SC is subjected to S / P conversion for forming 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps /.
20-bit word string data DPC (20) with 20 = 74.25 MBps is reproduced. Then, the 20-bit word string data DP reproduced by the S / P converter 228
A (20) is supplied to the data reproduction processing unit 216.

In the data reproduction processing unit 216, 20
Bit word string data DPA (20), DPB (20)
And the DPC (20) are subjected to data processing that is the reverse of the data processing performed on the data DVX in the data processing unit 202, whereby the 20-bit word string data D
The data DVX based on the PA (20), the DPB (20) and the DPC (20) is reproduced, and is reproduced by the signal recording / reproducing unit 2.
01. Data DV reproduced in this manner
X is the data DVA12 + DKA1 shown in FIG.
2, DVA14 + DKA14, DVA16 + DKA16
And DVB12 + DKB12. Then, in the signal recording / reproducing unit 201, for example, recording of the data DVX by the built-in VTR is performed.

[0210] The signal recording / reproducing section 201 is also provided with a return data forming section. For example, each of the return data forming sections has a word transmission rate of 74.25 MB.
The return data DPM1 and DPM2, which are 20-bit word string data of ps, are transmitted.

[0211] Return data DPM1 obtained from the signal recording / reproducing unit 201 is supplied to the P / S converter 230.

The P / S conversion section 230 performs P / S conversion on the return data DPM1 to form serial data DSM1 having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps. It is supplied to the E / O converter 231. The E / O conversion unit 231 is configured similarly to the E / O conversion unit 51 in the example illustrated in FIG. 1, performs an electro-optical conversion process on the serial data DSM1, and
The center wavelength is approximately 1.3 based on the serial data DSM1.
The optical signal OSM1 having the bit transmission rate of 1.
It is transmitted under the condition of 485 Gbps. This optical signal OS
M1 is supplied to the bidirectional WDM coupler 210.

In the bidirectional WDM coupler 210, the optical signal OSM1 having a bit transmission rate of several 1.485 Gbps and a center wavelength of approximately 1.3 μm from the E / O conversion unit 231 is used as the first signal. It is supplied from the input / output terminal and is led to the third input / output terminal. Third of the directional coupling unit 210
The optical signal OSM1 led to the input / output end of the optical signal transmission cable 209 is transmitted from the other end to the optical signal transmission cable 209 through the optical connector 211, and transmitted from the other end to the one end of the optical signal transmission cable 209. Optical connector 2 from one end
08 to the bidirectional WDM coupler 207.

In the bidirectional WDM coupler 207, the optical signal OSM1 through the optical connector 208 is transmitted to the third
Is supplied from the input / output terminal and is output to the second input / output terminal. The optical signal OSM1 guided to the second input / output terminal of the bidirectional WDM coupler 207 is guided to the O / E converter 232.

In the O / E converter 232, the bit transmission rate is 1.485 Gbps, and the center wavelength is approximately 1.
The optical signal OSM1 having a thickness of 3 μm is subjected to photoelectric conversion processing,
The bit transmission rate based on the optical signal OSM1 is 1.48.
The serial data DSM1 at 5 Gbps is reproduced.
Then, the reproduced serial data DSM1 is S / P
The data is supplied to the conversion unit 233.

In the S / P converter 233, the serial data D having a bit transmission rate of 1.485 Gbps
SM1 is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate is set to 1.485 Gbps / 20 = 74.25M based on serial data DSM1.
The return data DPM1, which is set to Bps, is reproduced and supplied to the camera unit 200.

The return data DPM2 obtained from the signal recording / reproducing unit 201 is supplied to a P / S converter 235.

The P / S conversion section 235 performs P / S conversion on the return data DPM2 to form serial data DSM2 having a bit transmission rate of 74.25 MBps × 20 = 1.485 Gbps, and converts this to serial data DSM2. It is supplied to the E / O converter 236. The E / O conversion unit 236 is configured similarly to the E / O conversion unit 51 in the example illustrated in FIG. 1, and performs an electro-optical conversion process on the serial data DSM2.
The center wavelength is approximately 1.3 based on the serial data DSM2.
The optical signal OSM2 having a bit transmission rate of 1.
It is transmitted under the condition of 485 Gbps. This optical signal OS
M2 is provided to a bidirectional WDM coupler 225.

In the bidirectional WDM coupler 225, an optical signal OSM2 from the E / O converter 236 having a bit transmission rate of several 1.485 Gbps and a center wavelength of approximately 1.3 μm is provided by the first optical signal OSM2. It is supplied from the input / output terminal and is led out to the third input / output terminal. Bidirectional WDM coupler 2
The optical signal OSM2 led to the 25th third input / output terminal is:
Through the optical connector 226, the optical signal transmission cable 224
To the optical signal transmission cable 224
Is transmitted from the other end to one end, and the bidirectional WDM coupler 222 is transmitted through the optical connector 223 from one end.
It is led to.

In the bidirectional WDM coupler 222, the optical signal OSM2 transmitted through the optical connector 223 is transmitted to the third
Is supplied from the input / output terminal and is output to the second input / output terminal. The optical signal OSM2 guided to the second input / output terminal of the bidirectional WDM coupler 222 is guided to the O / E converter 237.

In the O / E converter 237, the bit transmission rate is 1.485 Gbps, and the center wavelength is approximately 1.
The optical signal OSM2 of 3 μm is subjected to photoelectric conversion processing,
The bit transmission rate based on the optical signal OSM2 is 1.48.
The serial data DSM2 having 5 Gbps is reproduced.
Then, the reproduced serial data DSM2 is S / P
The data is supplied to the conversion unit 238.

The S / P converter 238 converts the serial data D at a bit transmission rate of 1.485 Gbps.
SM2 is subjected to S / P conversion processing for obtaining 20-bit parallel data, and the word transmission rate based on serial data DSM2 is set to 1.485 Gbps / 20 = 74.25M.
The return data DPM2, which is set to Bps, is reproduced and supplied to the camera unit 200.

In the example shown in FIGS. 23 and 24, the data DV obtained from the camera
X is the data DVA12 + DKA1 shown in FIG.
2, DVA14 + DKA14, DVA16 + DKA16
Is converted into an optical signal OZ and an optical signal OZC under any one of DVB12 and DKB12, and optical signal transmission cables 209 and 224 are transmitted from the camera unit 200 side.
The return data DPM1 and DPM2 transmitted from the signal recording / reproducing unit 201 to the signal recording / reproducing unit 201 through the optical signals OSM1 and OSM
2 and transmitted from the signal recording / reproducing unit 201 side to the camera unit 200 through the optical signal transmission cables 209 and 224, and transmitted through the optical signal transmission cables 209 and 224 to the optical signals OZ and OZC and the optical signals OSM1 and OSM.
Bidirectional transmission with respect to SM2 is performed.

The conversion of the data DVX obtained from the camera unit 200 into optical signals OZ and OZC, and the return data DPM1 and DPM2 from the optical signals OSM1 and OZC are also performed.
Conversion to SM2 is performed, for example, by converting the HD
This can be done using existing circuit components used for serial transmission according to SDI.

[0225]

As is apparent from the above description, the data transmission method according to any one of the first to twenty-fourth aspects of the present invention, or the thirty to thirty-fourth aspects of the present invention. 32. The data transmission apparatus according to any one of the preceding claims, wherein the first and second data based on the digital data forming the 720P signal or the digital data forming the 720P signal and the parallel data forming the additional information data sequence. 2 serial data and third serial data or third and fourth serial data different from them are converted into a plurality of optical signals, which are converted into one optical signal transmission cable or two optical signal transmissions. It is transmitted bidirectionally through the cable.

Then, each optical signal is reliably obtained at the transmission destination through the optical signal transmission cable for each optical signal.
If necessary, the first and second serial data and the third serial data or the third and fourth serial data are reproduced based on each optical signal obtained at the transmission destination.

The data transmission method according to any one of claims 25 to 29 in the claims of the present invention as described above, or the data transmission method according to the invention described in claim 33 In the data transmission apparatus, first, second and third serial data based on digital data forming a 720P signal and parallel data forming an additional information data sequence, and fourth and fifth serial data different therefrom are provided. The serial data is converted into a plurality of optical signals, which are bidirectionally transmitted through two optical signal transmission cables.

Each optical signal is reliably obtained at the transmission destination through the optical signal transmission cable for each optical signal.
If necessary, the first, second, and third serial data and the fourth and fifth serial data are reproduced based on each optical signal obtained at the transmission destination.

Further, in each case, bidirectional transmission between the first and second serial data and the third serial data or the third and fourth serial data, or the first, second and third serial data, Bidirectional transmission of serial data and fourth and fifth serial data can be performed, for example, by utilizing existing circuit components used for serial transmission of digital video signals according to HD SDI. .

[0230] The data transmission method or data transmission apparatus according to the invention described in the claims of the present application uses, for example, the number of quantization bits obtained from each of a plurality of video cameras constituting a camera unit. A plurality of serial data based on parallel data forming digital data forming a 720P signal or digital data forming a 720P signal and a key signal data sequence which is an additional information data sequence having 10 bits or more, It is applied to bidirectional transmission of a plurality of optical signals obtained by converting serial data based on one or two return data using an optical signal transmission cable between a camera unit and a signal recording / reproducing unit. In this case, the optical signal transmission cable between the camera unit and the signal recording / reproducing unit for the plurality of optical signals is used. Bi-directional transmission using the existing circuit components can be performed efficiently using the existing circuit components to minimize the number of optical signal transmission cables. It is planned.

[Brief description of the drawings]

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

FIG. 2 is a conceptual diagram showing data used for explaining the operation of a data processing unit in the example shown in FIG.

FIG. 3 is a conceptual diagram showing data used for explaining the operation of a data processing unit in the example shown in FIG. 1;

FIG. 4 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG.

FIG. 5 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG. 1;

FIG. 6 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG. 1;

FIG. 7 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG.

FIG. 8 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG.

FIG. 9 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG.

FIG. 10 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG. 1;

FIG. 11 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG. 1;

FIG. 12 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG.

FIG. 13 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the example shown in FIG.

14 is a block connection diagram showing a specific configuration example of an E / O conversion unit in the example shown in FIG.

FIG. 15 shows a diagram of 1.55 used in the specific configuration example of FIG. 14;
FIG. 4 is a characteristic diagram used for describing a μm band DFB laser diode.

FIG. 16 shows a bidirectional W used in the example shown in FIG.
FIG. 3 is a block connection diagram illustrating a specific configuration example of a DM coupler.

FIG. 17 shows a bidirectional W used in the example shown in FIG.
FIG. 3 is a block connection diagram illustrating a specific configuration example of a DM coupler.

18 is a block connection diagram illustrating a specific configuration example of an E / O conversion unit in the example illustrated in FIG.

FIG. 19 shows a 1.3 μm used in the specific configuration example of FIG.
FIG. 4 is a characteristic diagram used for describing an m-band FP laser diode.

FIG. 20 is a block diagram showing an embodiment of a data transmission method according to any one of claims 9 to 16 according to the present invention; It is a block connection diagram showing a part of an example of a data transmission device concerning an indicated invention.

FIG. 21 is a diagram illustrating an example of a data transmission method according to the invention according to claim 9; It is a block connection diagram showing a part of an example of a data transmission device concerning an indicated invention.

FIG. 22. Claim 17 in the claims of the present application
Block showing an example of the data transmission apparatus according to the invention according to claim 32 in which the example of the data transmission method according to the invention described in any one of claims to 24 is implemented. FIG.

FIG. 23. Claim 25 in the claims of the present application
The example of the data transmission method according to the invention described in claim 33 in which the example of the data transmission method according to the invention described in any one of claims to 29 is implemented. It is a block connection diagram shown.

FIG. 24. Claim 25 in the claims of the present application
The example of the data transmission method according to the invention described in claim 33 in which the example of the data transmission method according to the invention described in any one of claims to 29 is implemented. It is a block connection diagram shown.

FIG. 25 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the examples shown in FIGS. 23 and 24.

FIG. 26 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the examples shown in FIGS. 23 and 24.

FIG. 27 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the examples shown in FIGS. 23 and 24.

FIG. 28 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the examples shown in FIGS. 23 and 24.

FIG. 29 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the examples shown in FIGS. 23 and 24.

FIG. 30 is a conceptual diagram showing data used for explaining the operation of the data processing unit in the examples shown in FIGS. 23 and 24.

FIG. 31 is a conceptual diagram explaining an example of a data format of an HD digital video signal.

FIG. 32 is a conceptual diagram explaining an example of a data format of an HD digital video signal.

FIG. 33 is a characteristic diagram showing an attenuation characteristic of a quartz-based SMF. It is a conceptual diagram provided.

FIG. 34 is a characteristic diagram showing dispersion characteristics of a quartz-based SMF.

FIG. 35 is a table provided for explaining digital data forming a 720P signal or data including digital data forming a 720P signal and digital data forming a Key signal accompanying the data;

[Description of References] 10, 70, 110, 200: Camera Unit, 11,
71, 111, 201 ... signal recording / reproducing unit, 12,
72, 112, 202 ... data processing unit, 13, 1
5,50,56,73,83,95,99,113,1
16,185,203,205,220,230,23
5 ... P / S converter, 14,204 ... Bit multiplexing unit, 16,51,57,74,84,96,10
0,114,117,186,206,221,23
1,236 ... E / O converter, 17,52 ... Laser driver, 18 ... 1.55 μm band DFB laser diode, 19,32,75,78,85,88,
207, 210, 222, 225 ... bidirectional WDM
Coupler, 20, 34 ... directional coupling part, 21,
23, 25, 30, 33, 35, 37, 39, 58, 6
0, 76, 79, 86, 89, 118, 179, 18
7, 190, 208, 211, 223, 226 ... optical connector, 31, 59, 77, 87, 177, 18
9, 209, 224 ... optical signal transmission cable, 4
1, 54, 61, 80, 90, 97, 101, 180,
183, 191, 212, 227, 232, 237 ...
-O / E conversion unit, 42, 213 ... bit separation unit,
43, 44, 55, 62, 81, 91, 98, 102,
181, 184, 192, 214, 215, 228, 2
33, 238... S / P converter, 45, 82, 18
2,216... Data reproduction processing unit, 53.
3 μm band FP laser diode, 115: demultiplexing unit, 178: separation unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04N 7/10 F term (Reference) 5C064 BA02 BB05 EA03 5K002 AA05 BA05 DA02 DA04 DA05 FA01 GA01 5K028 BB08 EE03 EE05 KK01 KK12 LL15 MM05 MM08 MM12 SS06 SS16

Claims (33)

[Claims] A frame rate is set to 60 Hz, the number of effective lines in each frame is set to 720 lines, and the number of effective data samples in each line is set to 1280 samples. First and second based on parallel data corresponding to a digital video signal. The first and second serial data are respectively obtained based on the first and second word string data, and the first and second serial data are subjected to bit multiplexing / synthesis processing to obtain a composite serial Forming data, converting the composite serial data into a first optical signal having a first center wavelength, and providing the first optical signal with first and second input / output terminals at one end. Supplied to the first input / output terminal of the first bidirectional wavelength-division multiplex coupler having a third input / output terminal provided on the other end side, and guided to the third input / output terminal. The first optical signal is transmitted to the optical signal transmission cable and transmitted from one end to the other end of the optical signal transmission cable, and the third serial data is defined as the first center wavelength. The second optical signal is converted into a second optical signal having a different second center wavelength, and the second optical signal is provided with fourth and fifth input / output terminals at one end and a sixth optical signal at the other end. The second optical signal supplied to the fourth input / output terminal of the second bidirectional wavelength division multiplexing coupler having the input / output terminal of The first signal transmitted to the optical signal transmission cable and transmitted from the other end to the one end, and transmitted to the other end of the optical signal transmission cable.
Out to the fifth input / output terminal of the second bidirectional wavelength multiplexing coupler, and the second optical signal transmitted to one end of the optical signal transmission cable.
A data transmission method for deriving the optical signal of (1) to the second input / output terminal of the first bidirectional wavelength division multiplexing coupler. 2. The parallel data is composed of 12 bits each,
24 bits, 28 bits or 32 bits formed by parallel arrangement of a luminance signal data sequence and a chrominance signal data sequence as 4-bit or 16-bit word string data.
The parallel data has 12 bits, 14 bits, or 16 bits each of the luminance signal data sequence and the chrominance signal data sequence as upper 10 bits and lower 2 bits, 4 bits, or 6 bits. The first word string data based on the divided upper 10 bits and the divided lower 2
2. The data transmission method according to claim 1, wherein data processing for forming second word string data based on bits, 4 bits or 6 bits and auxiliary bits is performed. 3. The parallel data has a 30-bit configuration formed by a parallel arrangement of a green primary color signal data sequence, a blue primary color signal data sequence, and a red primary color signal data sequence, each of which is 10-bit word string data, The parallel data includes a 10-bit word forming each of the green primary color signal data sequence, the blue primary color signal data sequence, and the red primary color signal data sequence, a 10-bit word forming the green primary color signal data sequence, and the blue primary color signal sequence. A first word group including a part of a 10-bit word forming each of a signal data sequence and a red primary color signal data sequence, a 10-bit word forming an auxiliary data sequence, and the blue primary color signal data sequence and the red primary color signal And a second word group including the other part of the 10-bit word constituting each of the data sequences. Divided, the first and first and data transmission method according to claim 1, wherein the performing data processing for forming a second word sequence data based respectively on a second word group. 4. The parallel data has a 36-bit structure formed by a parallel arrangement of a green primary color signal data sequence, a blue primary color signal data sequence and a red primary color signal data sequence, each of which is 12-bit word string data, The parallel data is divided into 12-bit words constituting each of the green primary color signal data sequence, the blue primary color signal data sequence and the red primary color signal data sequence into upper 10 bits and lower 2 bits. A first word string data based on a plurality of upper 10 bits divided from the data sequence and a part of the plurality of upper 10 bits divided from each of the blue primary color signal data sequence and the red primary color signal data sequence; The other part of the plurality of upper 10 bits divided from each of the blue primary color signal data sequence and the red primary color signal data sequence, and Data processing for forming second word string data based on a plurality of lower two bits divided from the color primary color signal data series, the blue primary color signal data series, and the red primary color signal data series. Item 2. The data transmission method according to Item 1. 5. A parallel arrangement of a luminance signal data sequence and a chrominance signal data sequence, each of which is 10-bit word string data, and an additional information data sequence having a data format equivalent to the luminance signal data sequence. The parallel data includes a first word string data based on the luminance signal data series and the chrominance signal data series, a second word string data based on the additional information data series, 2. The data transmission method according to claim 1, wherein data processing for forming the data is performed. 6. The parallel data has a data format equivalent to a green primary color signal data sequence, a green primary color signal data sequence, a red primary color signal data sequence and a green primary color signal data sequence each of which is 10-bit word string data. And a 40-bit configuration formed in parallel with the additional information data sequence described above. The parallel data includes the green primary color signal data sequence, the blue primary color signal data sequence, the red primary color signal data sequence, and the additional information data sequence. The 10-bit word to be formed is a 10-bit word that forms the green primary color signal data sequence and the 10-bit word that forms the blue primary color signal data sequence and the red primary color signal data sequence respectively.
A first group of words comprising a portion of a bit word;
A second word group including a 10-bit word forming the additional information data sequence and another part of the 10-bit word forming each of the blue primary color signal data sequence and the red primary color signal data sequence; A first word string data based on a first word group;
2. A data transmission method according to claim 1, wherein data processing for forming the second word string data based on the word group is performed. 7. The data transmission method according to claim 5, wherein the additional information data sequence represents key signal information on a digital video signal. 8. Each of the first and second word string data is:
8. The data transmission method according to claim 1, wherein the data transmission rate is 20-bit word string data at a word transmission rate of 74.25 MBps. 9. A frame rate of 60 Hz, the number of effective lines in each frame is set to 720, and the number of effective data samples in each line is set to 1280 samples. First and second based on parallel data corresponding to a digital video signal. Obtaining first and second serial data based on the first and second word string data, respectively, and converting the first serial data into a first optical signal having a first center wavelength. And converts the first optical signal into a first signal having first and second input / output terminals on one end and a third input / output terminal on the other end. The first optical signal supplied to the first input / output terminal of the directional wavelength division multiplexing coupler and led out to the third input / output terminal is sent to a first optical signal transmission cable, and the first optical signal is transmitted to the first optical signal transmission cable. Optical signal transmission cable And transmitting the second serial data to a second optical signal having a second center wavelength, and transmitting the second optical signal to the one end. A fourth input / output terminal provided with fourth and fifth input / output terminals, and a sixth input / output terminal provided on the other end side, for supplying to the fourth input / output terminal of the second bidirectional wavelength division multiplexing coupler; Sending the second optical signal led out to the sixth input / output end to a second optical signal transmission cable and transmitting it from one end to the other end of the second optical signal transmission cable; The third serial data is converted into a third optical signal having a third central wavelength different from the first central wavelength, and the third optical signal is supplied to one end of the third optical signal. A third bidirectional wavelength multiplexing filter having an input / output end and a ninth input / output end provided on the other end side; The third optical signal supplied to the seventh input / output terminal of the first optical signal and guided to the ninth input / output terminal is transmitted to the first optical signal transmission cable and transmitted from the other end to the third optical signal. Transmitting the fourth serial data to a fourth optical signal having a fourth central wavelength different from the second central wavelength, and transmitting the fourth optical signal to one end. The tenth input / output terminal is provided on the side and the twelfth input / output terminal is provided on the other end side. And transmitting the fourth optical signal led out to the twelfth input / output terminal to the second optical signal transmission cable and transmitting the fourth optical signal from the other end to the one end; The first optical signal transmitted to the other end of the optical signal transmission cable is transmitted to the third bidirectional The third optical signal guided to the eighth input / output end of the wavelength multiplexing coupler and transmitted to one end of the first optical signal transmission cable is transmitted to the first bidirectional wavelength multiplexing coupler. The second optical signal guided to the second input / output end and transmitted to the other end of the second optical signal transmission cable is transmitted to the eleventh optical bidirectional wavelength division multiplexing coupler. The fourth optical signal transmitted to one end of the second optical signal transmission cable is output to the fifth input / output terminal of the third bidirectional wavelength multiplexing coupler. Derived data transmission method. 10. Each of the parallel data has 12 bits,
24 bits, 28 bits or 3 bits formed by arranging a luminance signal data sequence and a chrominance signal data sequence as 14-bit or 16-bit word string data in parallel.
The parallel data has a 12-bit, 14-bit, or 16-bit word that constitutes each of the luminance signal data sequence and the chrominance signal data sequence as upper 10 bits and lower 2 bits, 4 bits, or 6 bits. The first word string data based on the divided upper 10 bits and the second word string data based on the divided lower 2 bits, 4 bits or 6 bits, and the auxiliary bits 10. The data transmission method according to claim 9, wherein data processing is performed to form. 11. The parallel data has a 30-bit configuration formed by a parallel arrangement of a green primary color signal data sequence, a blue primary color signal data sequence, and a red primary color signal data sequence, each of which is 10-bit word string data, The parallel data includes a 10-bit word forming each of the green primary color signal data sequence, the blue primary color signal data sequence, and the red primary color signal data sequence, a 10-bit word forming the green primary color signal data sequence, and the blue primary color signal sequence. A first word group including a part of a 10-bit word forming each of a signal data sequence and a red primary color signal data sequence, a 10-bit word forming an auxiliary data sequence, and the blue primary color signal data sequence and the red primary color signal A second word group including the other part of the 10-bit word constituting each of the data sequences. Ri divided, the first and first and data transmission method according to claim 9, wherein the performing data processing for forming a second word sequence data based respectively on a second word group. 12. The parallel data has a 36-bit structure formed by a parallel arrangement of a green primary color signal data sequence, a blue primary color signal data sequence and a red primary color signal data sequence, each of which is 12-bit word string data, The parallel data is divided into 12-bit words constituting each of the green primary color signal data sequence, the blue primary color signal data sequence and the red primary color signal data sequence into upper 10 bits and lower 2 bits. A first word string data based on a plurality of upper 10 bits divided from the data sequence and a part of the plurality of upper 10 bits divided from each of the blue primary color signal data sequence and the red primary color signal data sequence; Another upper part of the plurality of upper 10 bits divided from each of the blue primary color signal data series and the red primary color signal data series and Data processing for forming second word string data based on a plurality of lower two bits divided from the green primary color signal data series, the blue primary color signal data series, and the red primary color signal data series. Item 10. The data transmission method according to Item 9. 13. A parallel arrangement of a luminance signal data sequence and a chrominance signal data sequence, each of which is 10-bit word string data, and an additional information data sequence having a data format equivalent to the luminance signal data sequence. The parallel data includes a first word string data based on the luminance signal data series and the chrominance signal data series, a second word string data based on the additional information data series, 10. The data transmission method according to claim 9, wherein data processing for forming the data is performed. 14. The parallel data has a data format of a green primary color signal data sequence, a blue primary color signal data sequence, and a red primary color signal data sequence, each of which is 10-bit word string data, and a data format equivalent to the green primary color signal data sequence. And a 40-bit configuration formed in parallel with the additional information data sequence described above. The parallel data includes the green primary color signal data sequence, the blue primary color signal data sequence, the red primary color signal data sequence, and the additional information data sequence. The 10-bit word to be formed is 1 to form the 10-bit word forming the green primary color signal data sequence and the blue primary color signal data sequence and the red primary color signal data sequence, respectively.
A first word group including a part of a 0-bit word; a 10-bit word forming the additional information data sequence; and a 10-bit word forming each of the blue primary color signal data sequence and the red primary color signal data sequence. To form a second word string data based on the first word group and a second word string data based on the second word group. The data transmission method according to claim 9, wherein data processing is performed. 15. The data transmission method according to claim 13, wherein the additional information data sequence represents key signal information on a digital video signal. 16. Each of the first and second word string data has a word transmission rate of 74.25 MBps.
10. The method according to claim 9, wherein the data is bit word string data.
The data transmission method according to any one of claims 1 to 15. 17. A method according to claim 1, wherein the frame rate is 60 Hz, the number of effective lines in each frame is 720, and the number of effective data samples in each line is 1280. Obtaining first and second serial data based on the first and second word string data, respectively, and converting the first serial data into a first optical signal having a first center wavelength. And converts the second serial data into a second optical signal having a second center wavelength different from the first center wavelength, and multiplexes the first and second optical signals. To obtain a multiplexed optical signal,
The multiplexed optical signal is transmitted to the first optical signal transmission cable and transmitted from one end to the other end of the first optical signal transmission cable, and the third serial data having the third center wavelength is transmitted. 3, the third optical signal is transmitted to a second optical signal transmission cable and transmitted from one end to the other end of the second optical signal transmission cable. Demultiplexing the multiplexed optical signal transmitted to the other end of the optical signal transmission cable to obtain the first and second optical signals separated from each other. A data transmission method for deriving the third optical signal transmitted to the other end from the second optical signal transmission cable. 18. Parallel data, each having 12 bits,
24 bits, 28 bits or 3 bits formed by arranging a luminance signal data sequence and a chrominance signal data sequence as 14-bit or 16-bit word string data in parallel.
The parallel data has a 12-bit, 14-bit, or 16-bit word that constitutes each of the luminance signal data sequence and the chrominance signal data sequence as upper 10 bits and lower 2 bits, 4 bits, or 6 bits. The first word string data based on the divided upper 10 bits and the second word string data based on the divided lower 2 bits, 4 bits or 6 bits, and the auxiliary bits 18. The data transmission method according to claim 17, wherein data processing is performed to form. 19. The parallel data has a 30-bit structure formed by a parallel arrangement of a green primary color signal data sequence, a blue primary color signal data sequence, and a red primary color signal data sequence, each of which is 10-bit word string data, The parallel data includes a 10-bit word forming each of the green primary color signal data sequence, the blue primary color signal data sequence, and the red primary color signal data sequence, a 10-bit word forming the green primary color signal data sequence, and the blue primary color signal sequence. A first word group including a part of a 10-bit word forming each of a signal data sequence and a red primary color signal data sequence, a 10-bit word forming an auxiliary data sequence, and the blue primary color signal data sequence and the red primary color signal A second word group including the other part of the 10-bit word constituting each of the data sequences. Ri divided, claims, characterized in that performing data processing for forming the first and second word sequence data based respectively on the first and second word group 17
Data transmission method as described. 20. The parallel data has a 36-bit structure formed by a parallel arrangement of a green primary color signal data sequence, a blue primary color signal data sequence, and a red primary color signal data sequence, each of which is 12-bit word string data, The parallel data is divided into 12-bit words constituting each of the green primary color signal data sequence, the blue primary color signal data sequence and the red primary color signal data sequence into upper 10 bits and lower 2 bits. A first word string data based on a plurality of upper 10 bits divided from the data sequence and a part of the plurality of upper 10 bits divided from each of the blue primary color signal data sequence and the red primary color signal data sequence; Another upper part of the plurality of upper 10 bits divided from each of the blue primary color signal data series and the red primary color signal data series and Data processing for forming second word string data based on a plurality of lower two bits divided from the green primary color signal data series, the blue primary color signal data series, and the red primary color signal data series. Item 18. The data transmission method according to Item 17. 21. A parallel arrangement of a luminance signal data sequence and a chrominance signal data sequence, each of which is 10-bit word string data, and an additional information data sequence having a data format equivalent to the luminance signal data sequence. The parallel data includes a first word string data based on the luminance signal data series and the chrominance signal data series, a second word string data based on the additional information data series, 18. The data transmission method according to claim 17, wherein data processing is performed to form the data. 22. The parallel data has a data format of a green primary color signal data sequence, a blue primary color signal data sequence and a red primary color signal data sequence, each of which is 10-bit word string data, and a data format equivalent to the green primary color signal data sequence. And a 40-bit configuration formed in parallel with the additional information data sequence described above. The parallel data includes the green primary color signal data sequence, the blue primary color signal data sequence, the red primary color signal data sequence, and the additional information data sequence. The 10-bit word to be formed is 1 to form the 10-bit word forming the green primary color signal data sequence and the blue primary color signal data sequence and the red primary color signal data sequence, respectively.
A first word group including a part of a 0-bit word; a 10-bit word forming the additional information data sequence; and a 10-bit word forming each of the blue primary color signal data sequence and the red primary color signal data sequence. To form a second word string data based on the first word group and a second word string data based on the second word group. The data transmission method according to claim 17, wherein data processing is performed. 23. The data transmission method according to claim 21, wherein the additional information data sequence represents key signal information on a digital video signal. 24. Each of the first and second word string data has a word transmission rate of 74.25 MBps.
2. The method according to claim 1, wherein the data is bit word string data.
The data transmission method according to any one of claims 7 to 23. 25. First and second parallel data based on a digital video signal in which a frame rate is set to 60 Hz, the number of effective lines in each frame is set to 720, and the number of effective data samples in each line is set to 1280. And third word string data. First, second, and third serial data based on the first, second, and third word string data, respectively, are obtained. A bit multiplexing / synthesizing process is performed to form composite serial data, the composite serial data is converted into a first optical signal having a first center wavelength, and the first optical signal is first And a second input / output terminal and a third input / output terminal provided on the other end side to supply the first input / output terminal of the first bidirectional wavelength division multiplexing coupler; The first optical signal guided to the third input / output terminal is transmitted to a first optical signal transmission cable and transmitted from one end to the other end of the first optical signal transmission cable. Converting the third serial data into a second optical signal having a second center wavelength, and providing the second optical signal with fourth and fifth input / output terminals on one end side; The second input / output terminal of the second bidirectional wavelength division multiplexing coupler having a sixth input / output terminal provided on the other end side supplies the fourth input / output terminal and is supplied to the sixth input / output terminal. 2 is transmitted to the second optical signal transmission cable and transmitted from one end to the other end of the second optical signal transmission cable, and the fourth serial data is transmitted with the first center wavelength. Converts the third optical signal into a third optical signal having a different third center wavelength, and converts the third optical signal to a seventh optical signal at one end. And a seventh input / output terminal of a third bidirectional wavelength division multiplexing coupler provided with an eighth input / output terminal and a ninth input / output terminal on the other end side. The third optical signal led out to the input / output end of the third optical signal is sent to the first optical signal transmission cable and transmitted from the other end to the one end, and the fifth serial data is transmitted to the first optical signal transmission cable. The second optical signal is converted into a fourth optical signal having a fourth central wavelength different from the second central wavelength, and the fourth optical signal is provided with tenth and eleventh input / output terminals on one end side, and The fourth bidirectional wavelength-division multiplexing coupler having a twelfth input / output terminal provided on the end side supplies the fourth input / output terminal to the tenth input / output terminal and leads the fourth input / output terminal to the twelfth input / output terminal. Out to the second optical signal transmission cable from the other end to the one end. Transmitting the first optical signal transmitted to the other end of the first optical signal transmission cable to the eighth input / output terminal of the third bidirectional wavelength-division multiplexing coupler; Leading the third optical signal transmitted to one end of the first optical signal transmission cable to the second input / output terminal of the first bidirectional wavelength-division multiplexing coupler; The second optical signal transmitted to the other end of the signal transmission cable is led out to the eleventh input / output terminal of the fourth bidirectional wavelength division multiplexing coupler, and the second optical signal transmission cable is A data transmission method of deriving the fourth optical signal transmitted to one end of the second bidirectional wavelength multiplexing coupler to the fifth input / output terminal of the second bidirectional wavelength division multiplexing coupler. 26. Each of the parallel data has 12 bits,
32 formed by parallel arrangement of a luminance signal data sequence and a chrominance signal data sequence as 14-bit or 16-bit word sequence data and an additional information data sequence having a data format equivalent to that of the luminance signal data sequence.
Bit, 42 bits, or 48 bits, and the parallel data includes 12-bit, 14-bit, or 16-bit words for forming the luminance signal data sequence, the chrominance signal data sequence, and the additional information data sequence, respectively.
First word string data based on a plurality of upper 10 bits divided from the upper 10 bits and lower 2 bits, 4 bits, or 6 bits and divided from the luminance signal data sequence and the color difference signal data sequence; Second word string data based on a plurality of lower 2 bits, 4 bits, or 6 bits divided from the data sequence and the chrominance signal data sequence; a plurality of upper 10 bits and a plurality of lower bits divided from the additional information data sequence; 26. The data transmission method according to claim 25, wherein data processing for forming third word string data based on 2 bits, 4 bits or 6 bits is performed. 27. The parallel data has a data format that is equivalent to the green primary color signal data sequence, the green primary color signal data sequence, the blue primary color signal data sequence and the red primary color signal data sequence, each of which is 12-bit word string data. A 48-bit configuration formed in parallel arrangement with the additional information data sequence described above, and each of the green primary color signal data sequence, blue primary color signal data sequence, red primary color signal data sequence and additional information data sequence is added to the parallel data. Each 12-bit word to be formed is divided into upper 10 bits and lower 2 bits.
Into a plurality of upper 10 bits divided from the green primary color signal data sequence and a part of the plurality of upper 10 bits divided from each of the blue primary color signal data sequence and the red primary color signal data sequence. A first word string data, another part of a plurality of upper 10 bits divided from each of the blue primary color signal data series and the red primary color signal data series, and the green primary color signal data series and the blue primary color signal data series. And second word string data based on a plurality of lower 2 bits divided from the red primary color signal data series, and a third word string data based on a plurality of upper 10 bits and a plurality of lower 2 bits divided from the additional information data series. 26. The data transmission method according to claim 25, wherein data processing for forming the word string data is performed. 28. The data transmission method according to claim 26, wherein the additional information data sequence represents key signal information on a digital video signal. 29. The method according to claim 25, wherein each of the first, second and third word string data is 20-bit word string data having a word transmission rate of 74.25 MBps. The data transmission method according to any one of the above. 30. A frame rate of 60 Hz, the number of effective lines in each frame is set to 720, and the number of effective data samples in each line is set to 1280 samples. First and second based on parallel data corresponding to a digital video signal. A data processing unit that obtains the word string data, a parallel / serial conversion unit that obtains first and second serial data based on the first and second word string data, respectively, and the first and second serial data. Performs a bit multiplexing / synthesis process to form composite serial data, converts the composite serial data into a first optical signal having a first center wavelength, a first optical signal forming unit, A second optical signal forming unit for converting into a second optical signal having a second center wavelength different from the first center wavelength; A first input / output terminal; a third input / output terminal; and a third input / output terminal provided on the other end side, wherein the first optical signal is supplied to the first input / output terminal and the third input / output terminal is provided.
A first bidirectional wavelength-division multiplexing coupler led out to the input / output end of the device, and fourth and fifth input / output ends provided on one end side and a sixth input / output end provided on the other end side The second optical signal is supplied to the fourth input / output terminal and the sixth optical signal is supplied to the sixth input / output terminal.
A second bidirectional wavelength division multiplexing coupler led out to the input / output end of the first bidirectional wavelength division multiplexing coupler, and a first optical signal led out to a third input / output end of the first bidirectional wavelength division multiplexing coupler And transmitting the second optical signal guided to the sixth input / output terminal of the second bidirectional wavelength multiplexing coupler from the other end to the one end. One optical signal is guided to a fifth input / output terminal of the second bidirectional wavelength division multiplexing coupler, and the second optical signal is transmitted to a second input / output terminal of the first bidirectional wavelength division multiplexing coupler. An optical signal transmission cable led out to an output end. A frame rate is 60 Hz, the number of effective lines in each frame is set to 720, and the number of effective data samples in each line is set to 1280 samples. A data processing unit that obtains the first word data; a parallel / serial conversion unit that obtains first and second serial data based on the first and second word data, respectively; A first optical signal forming unit for converting the second serial data into a first optical signal having a second center wavelength, and a second optical signal forming unit converting the second serial data into a second optical signal having a second center wavelength A third optical signal forming unit for converting the third serial data into a third optical signal having a third central wavelength different from the first central wavelength; A fourth optical signal forming unit for converting the serial data of the second optical signal into a fourth optical signal having a fourth central wavelength different from the second central wavelength; and a first and a second input / output terminal on one end side. Is provided and a third input / output terminal is provided on the other end side, and the first optical signal is supplied to the first input / output terminal and the third input / output terminal is provided.
A first bidirectional wavelength-division multiplexing coupler led out to the input / output end of the device, and fourth and fifth input / output ends provided on one end side and a sixth input / output end provided on the other end side The second optical signal is supplied to the fourth input / output terminal and the sixth optical signal is supplied to the sixth input / output terminal.
A second bidirectional wavelength-division multiplexing coupler led out to the input / output end of the first, second and third input / output ends, and a ninth input / output end provided on the other end side The third optical signal is supplied to the seventh input / output terminal and the third optical signal is supplied to the ninth input / output terminal.
A third bidirectional wavelength-division multiplexing coupler led out to the input / output end, and tenth and eleventh input / output ends provided on one end side and a twelfth input / output end provided on the other end side Consisting of
A fourth bidirectional wavelength division multiplexing coupler in which the fourth optical signal is supplied to the tenth input / output terminal and led out to the twelfth input / output terminal; and the first bidirectional wavelength division multiplexing coupler. The first optical signal guided to the third input / output terminal is transmitted from one end to the other end, and is guided to the ninth input / output terminal of the third bidirectional wavelength division multiplexing coupler. A third optical signal is transmitted from the other end to the one end, and the first optical signal is guided to an eighth input / output end of the third bidirectional wavelength division multiplexing coupler. A first optical signal transmission cable for leading a third optical signal to a second input / output end of the first bidirectional wavelength division multiplexing coupler; While transmitting the second optical signal guided to the sixth input / output terminal from one end to the other end, The fourth optical signal guided to the twelfth input / output terminal of the fourth bidirectional wavelength multiplexing coupler is transmitted from the other end to the one end, and the second optical signal is transmitted to the fourth input / output terminal. And the fourth optical signal is guided to a fifth input / output terminal of the second bidirectional wavelength division multiplexing coupler. And a second optical signal transmission cable. 32. A frame rate of 60 Hz, the number of effective lines in each frame is set to 720, and the number of effective data samples in each line is set to 1280 samples. A data processing unit that obtains the first word data; a parallel / serial conversion unit that obtains first and second serial data based on the first and second word data, respectively; A first optical signal forming unit that converts the second serial data into a first optical signal having a center wavelength of a second optical signal having a second center wavelength different from the first center wavelength A second optical signal forming unit for converting the third serial data into a third optical signal having a third center wavelength; A multiplexing unit that multiplexes the first and second optical signals to obtain a multiplexed optical signal; a first optical signal transmission cable that transmits the multiplexed optical signal from one end to the other end; A demultiplexing unit that demultiplexes the multiplexed optical signal led out to the other end of the optical signal transmission cable to obtain the first and second optical signals in a state where they are separated from each other; A second optical signal transmission cable for transmitting data from one end to the other end. 33. A frame rate of 60 Hz, the number of effective lines in each frame is set to 720, and the number of effective data samples in each line is set to 1280 samples. And a data processing unit that obtains third and fourth word string data; and a parallel / second processing unit that obtains first, second, and third serial data based on the first, second, and third word string data, respectively.
A serial conversion unit, which performs bit multiplexing / combining processing on the first and second serial data to form composite serial data, and converts the composite serial data into a first optical signal having a first center wavelength. 1 optical signal forming unit, a second optical signal forming unit that converts the third serial data into a second optical signal having a second central wavelength, and a fourth optical data that converts the fourth serial data into the first central data. A third optical signal forming unit that converts the third serial signal into a third optical signal having a third central wavelength different from the wavelength, and the fifth serial data having a fourth central wavelength different from the second central wavelength. A fourth optical signal forming section for converting into a fourth optical signal; first and second input / output terminals provided on one end side and a third input / output terminal provided on the other end side. The first optical signal is supplied to the first input / output terminal and Third
A first bidirectional wavelength-division multiplexing coupler led out to the input / output end of the device, and fourth and fifth input / output ends provided on one end side and a sixth input / output end provided on the other end side The second optical signal is supplied to the fourth input / output terminal and the sixth optical signal is supplied to the sixth input / output terminal.
A second bidirectional wavelength-division multiplexing coupler led out to the input / output end of the first, second and third input / output ends, and a ninth input / output end provided on the other end side The third optical signal is supplied to the seventh input / output terminal and the third optical signal is supplied to the ninth input / output terminal.
A third bidirectional wavelength-division multiplexing coupler led out to the input / output end, and tenth and eleventh input / output ends provided on one end side and a twelfth input / output end provided on the other end side Consisting of
A fourth bidirectional wavelength division multiplexing coupler in which the fourth optical signal is supplied to the tenth input / output terminal and led out to the twelfth input / output terminal; and the first bidirectional wavelength division multiplexing coupler. The first optical signal guided to the third input / output terminal is transmitted from one end to the other end, and is guided to the ninth input / output terminal of the third bidirectional wavelength division multiplexing coupler. A third optical signal is transmitted from the other end to the one end, and the first optical signal is guided to an eighth input / output end of the third bidirectional wavelength division multiplexing coupler. A first optical signal transmission cable for leading a third optical signal to a second input / output end of the first bidirectional wavelength division multiplexing coupler; While transmitting the second optical signal guided to the sixth input / output terminal from one end to the other end, The fourth optical signal guided to the twelfth input / output terminal of the fourth bidirectional wavelength multiplexing coupler is transmitted from the other end to the one end, and the second optical signal is transmitted to the fourth input / output terminal. And the fourth optical signal is guided to a fifth input / output terminal of the second bidirectional wavelength division multiplexing coupler. And a second optical signal transmission cable.