JP2001119694A - Data receiver, data transmitter-receiver, video device and their methods - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data transmission system, etc., capable of making a signal of an SDI system and a signal of an SDDI system coexist on the same transmission line and performing transmission and reception. SOLUTION: An S/P conversion circuit 200 receives a transmission signal and converts the transmission signal into a received signal into a 10-bit parallel format. A packet type data detection circuit 202 detects a packet for transmission from the received signal and detects the contents of SAV and EAV positions of the packet for transmission. A FIFO 204 performs buffering, so as not to make the front omission of the packet for transmission take place. A selector circuit 206 separates and outputs SDI data and SDDI data according to the control of a control circuit 210, corresponding to the contents of the SAV and EAV of the packet for transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data receiving apparatus, a data transmitting / receiving apparatus, a video apparatus, and a method for transmitting a plurality of transmission packets on the same transmission path.

[0002]

2. Description of the Related Art A serial digital interface (SDI) system has conventionally been used as a system for transmitting a digital video signal (hereinafter simply referred to as a video signal) or the like between devices used for video editing or the like. .
The signal format of the SDI system is SMPTE (Societies) as a standard for digital video and audio signals.
ety of Motion Picture and Television Engineerings
) Is standardized to SMPTE-295M. SD
The I system is used for transmitting digital video signals of the D1 system and the D2 system, and the transmission speed is 270M.
Hz.

However, the SDI system is limited to only one channel of a video signal and only eight channels of a baseband audio signal in the SDI system. Currently, multimedia which is increasing in the field of broadcasting or video editing is increasing. It is not necessarily suitable for responding to a demand for multi-channel or multi-channel. For this reason, an SDDI method that is more compatible with multimedia has been proposed so that variable-length video signal data can be transmitted while having considerable compatibility with the SDI method.

In order to transmit an SDI signal and an SDDI signal, a data transmission device (or data transmission / reception device) 8 shown in FIG. 7 may be used. The data transmission device 8 includes a data transmission device 800 and a data reception device 830. Data transmission device 80
0 indicates that the input SDI signal (SDI data) and SDDI data (SDDI data) are converted into serial data by FIFOs 812 and 822 and parallel / serial conversion circuits (P / S conversion circuits) 810 and 820, respectively. Then, the serial data is transmitted to the data receiving device 830 using different transmission paths.

The data receiving device 830 converts these signals sent from the data transmitting device 800 through different transmission paths into serial / parallel conversion circuits (S / P
Conversion circuits) 842, 852 and FIFOs 840, 85
The data is separated into original SDI data and SDDI data by 0, and output to the outside.

[0006] A synchronization signal that defines the timing of signal transmission between the data transmitting apparatus 800 and the data receiving apparatus 830 is transmitted from the data transmitting apparatus 800 to the FIFO 83.
2 and the P / S conversion circuit 834 transmits the data to the data transmitting apparatus 800 using another transmission path. The data receiving device 830 includes the S / P conversion circuit 802 and the FIF
The original synchronization signal is reproduced by O804 and used for internal processing and the like.

[0007]

Here, for reasons such as a desire to reduce the number of transmission lines and to simplify the construction work of the transmission lines, the same transmission line is used for the SDI signal and the SDDI signal. There is a request to use and transmit. However, while the SDI signal contains only fixed-length data, the SDDI signal sometimes contains variable-length data in addition to fixed-length data. Therefore,
When these signals are transmitted using the same transmission line, the SDI signal and the SDDI signal need to be separated on the receiving side and supplied to a video editing device or the like corresponding to each signal. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. In a video processing system in which a video device compatible with the SDI system and a video device compatible with the SDDI system coexist, these video devices are connected to each other. It is an object of the present invention to provide a data receiving apparatus, a data transmitting / receiving apparatus, and a data transmission system using the same, which are capable of transmitting and receiving an SDI signal and an SDDI signal mixedly on the same transmission path. Further, the present invention can automatically identify an SDI signal and an SDDI signal transmitted on the same transmission path, separate them into transmission packet units, and supply them to corresponding video equipment. It is an object to provide a possible data receiving device, a data transmitting / receiving device and a method thereof. Still another object of the present invention is to provide a video device and a video signal processing method for performing the above-described processing.

[0009]

To achieve the above object, a data receiving apparatus according to the present invention has an active video area in which digital video data is inserted and a start synchronization code of the active video area. A start code area, an end sync code area into which the end sync code of the active video area is inserted, and an ancillary data area into which data including auxiliary data is inserted, wherein the ancillary data area is the end sync A serial SDI in a first transmission packet, located between a code and the start synchronization code area, the start code area being arranged between the ancillary data area and the active video area. Data or the active video area, the start code area, and the end synchronization code area of the first transmission packet. And the payload area in which data including video data is inserted at the same position as the ancillary data area, the start code area, the end synchronization code area, and data including data identification data are inserted. SDDI data in a serial format in the second transmission packet, which is composed of an ancillary data area
Input serial SDI data or SDDI
Serial-parallel conversion means for converting data into parallel data; and data identification data inserted into the ancillary data area of the second transmission packet after inputting the parallel SDDI data converted by the conversion means. If the input data is the SDI data or the S
Detection means for detecting whether the data is DDI data and outputting data indicating the detection result indicated by the detection means, control means for receiving data indicating the detection result of the detection means and performing control processing based on the input data; The SDI data or the SDDI of the parallel data output from the conversion means.
Selection for selectively outputting the input SDI data or the SDDI data to a first output terminal to which data is input and the SDI data is output and a second output terminal to which the SDDI data is output Means,
The control means converts the SDI data or the SDDI data into the first data based on the data indicating the detection result.
Alternatively, the selection means is controlled so as to output to the second output terminal.

[0010] Further, a data transmitting / receiving apparatus according to the present invention comprises:
An active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, an end synchronization code area in which an end synchronization code of the active video area is inserted, and auxiliary data. And an ancillary data area into which data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is located between the ancillary data area and the active video. SDI data in serial format in a first transmission packet, or the active video area, the start code area, and the end synchronization code area of the first transmission packet, the SDI data being located between the active video area and the first transmission packet. Is located at the same position as the ancillary data area, and data including video data is inserted in the area. And load region, and the start code region, and the termination sync code area, de - composed of the ancillary data area in which data including a data identification data is inserted, SDDI serial format in the second transmission packet
Serial / parallel conversion means for inputting data and converting the input serial-format SDI data or SDDI data to parallel data; and inputting the parallel-format SDDI data converted by the conversion means and receiving the second data. The data input from the data identification data inserted in the ancillary data area of the transmission packet is the SD
Detecting means for detecting whether the data is I data or the SDDI data and outputting data indicating the detection result, control means for receiving data indicating the detection result of the detecting means, and parallel means for outputting data indicating the detection result The above SDI of data
The data or the SDDI data is input and the SD
A first output terminal from which the I data is output and a selection means for selectively outputting the input SDI data or the SDDI data to a second output terminal from which the SDDI data is output; The controller controls the selector to output the SDI data or the SDDI data to the first or second output terminal based on the data indicating the detection result.

[0011] Further, the data transmitting / receiving apparatus according to the present invention comprises:
A data transmission / reception device having a data transmission device and a data reception device connected via a data transmission path, the data reception device comprising: an active video area into which digital video data is inserted; and a start of the active video area. A start code area in which a sync code is inserted, an end sync code area in which the end sync code of the active video area is inserted, and an ancillary data area in which data including auxiliary data is inserted; A first transmission packet configured such that a data area is located between the end synchronization code and the start synchronization code area, and the start code area is located between the ancillary data area and the active video area. Or the active video of the first transmission packet. Area, the start code area, the end synchronization code area, and a payload area in which data including video data is inserted at the same position as the ancillary data area, the start code area, and the end synchronization code area. And an ancillary data area into which data including data identification data is inserted, and SDDI data in parallel format, which is located in the second transmission packet, is selectively input to the SDI data or SDD in parallel format.
First selecting means for outputting I data, first serial converting means for serially converting the parallel format SDI data or SDDI data output from the first selecting means, and first converting means. Data transmission means for transmitting the converted data to the data transmission path, wherein the data reception apparatus outputs the serial SDI data output from the data transmission apparatus and input via the data transmission path. First parallel conversion means for converting the data or the SDDI data into parallel SDI data or SDDI data; and a data transmission device based on the data identification data of the SDDI data output from the first parallel conversion means. The above data of S
Data identification means for detecting whether the data is SDDI data from the DI data and outputting data indicating the detection result;
A first input terminal to which the SDI data or the SDDI data output from the parallel conversion means is input;
A second input terminal to which the SDI data or SDDI data output from an external device different from the data transmission device is input, and a first output to output the data input from the first input terminal And a second output terminal for selectively outputting the data input from the first input terminal or the second input terminal, and an input / output of the selection device. Control means for selectively controlling based on the data indicating the detection result output from the data identification means and the set data, and the SDI data or the SDI data output from the second output terminal of the second selection means SDD
Second serial converting means for converting I data into serial data, wherein the SDI data or SD output from the second serial converting means of the data receiving apparatus is provided.
The DI data is output to another data receiving device of the data receiving device.

Further, in the data transmitting / receiving apparatus according to the present invention, there is provided an active video area into which digital video data is inserted, a start code area into which a start synchronization code of the active video area is inserted, and an end synchronization of the active video area. A code is inserted into the end synchronization code area, and an ancillary data area into which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area. , The start code area is located between the ancillary data area and the active video area, and the serial format SDI data in the first transmission packet; or
A payload area in which data including video data is inserted at the same position as the active video area, the start code area, the end synchronization code area, and the ancillary data area of the first transmission packet; A serial format SDD in the second transmission packet, comprising a code area, the end synchronization code area, and an ancillary data area into which data including data identification data is inserted.
A step of inputting I data; a step of converting the input serial format SDI data or SDDI data into parallel data; and a step of receiving the parallel format SDDI data converted in the conversion step. A detection step of detecting whether the input data is the SDI data or the SDDI data from the data identification data inserted in the ancillary data area of the second transmission packet, and outputting data indicating a detection result indicating the detection; And a control step of receiving data indicating the detection result obtained in the detection step, performing control based on the input data, and receiving the SDI data or the SDDI data of the parallel data obtained in the conversion step. And a first output terminal from which the SDI data is output, A selection step of selectively outputting the input SDI data or the SDDI data to a second output terminal from which the DI data is output, wherein in the control step and the selection step, the detection result is obtained. SDI data or SDDI based on the data shown
Data is output to the first or second output terminal, respectively.

Further, the data transmitting / receiving apparatus according to the present invention is characterized in that an active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, and an end synchronization of the active video area. A code is inserted into the end synchronization code area, and an ancillary data area into which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area. , The start code area is located between the ancillary data area and the active video area, and the serial format SDI data in the first transmission packet; or
A payload area in which data including video data is inserted at the same position as the active video area, the start code area, the end synchronization code area, and the ancillary data area of the first transmission packet; A serial format SDD in the second transmission packet, comprising a code area, the end synchronization code area, and an ancillary data area into which data including data identification data is inserted.
An input step of inputting I data, and serial SDI data or SDDI input in the input step.
A serial-parallel conversion step of converting data into parallel data; and a step of converting the parallel format SDDI data converted in the conversion step into data identification data inserted into the ancillary data area of the second transmission packet. The input data is SDI data or SD
A detection step of detecting whether the data is DI data and outputting data indicating a detection result indicated by the detection step, and a control step of receiving data indicating the detection result obtained by the detection step and performing a control process based on the data; The SDI data or the SDDI data of the parallel data obtained in the conversion step is input and the first output terminal from which the SDI data is output and the second output terminal from which the SDDI data is output are connected to the first output terminal. And a selecting step of selectively outputting the input SDI data or the SDDI data, respectively. In the controlling step and the selecting step, the SDI data or the SDDI data is respectively determined based on the data indicating the detection result. The signal is output to the first or second output terminal.

Further, a data transmitting / receiving apparatus according to the present invention is a data transmitting / receiving method for transmitting and receiving data via a data transmission path, the method including a data transmitting method and a data receiving method. An active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, an end synchronization code area in which an end synchronization code of the active video area is inserted, and auxiliary data. And the ancillary data area into which the data including the data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is active with the ancillary data area. A parallel layer located in the first transmission packet, configured to be located between the video area and the video area; SDI data or data including video data, which is located at the same position as the active video area, the start code area, the end synchronization code area, and the ancillary data area of the first transmission packet, is inserted. A parallel format S located in the second transmission packet, comprising a payload area, a start code area, an end synchronization code area, and an ancillary data area into which data including data identification data is inserted.
A data input step of inputting DDI data, a first selection step of selecting the data input in the data input step and outputting the SDI data or SDDI data in the parallel format, and a selection step in the first selection step A first serial conversion step of serially converting the parallel-format SDI data or SDDI data, and a data transmission step of transmitting the data converted in the first conversion step to the data transmission path. The data receiving method includes transmitting the data in the data transmission step, and inputting the serial format SD through the data transmission path.
A first parallel conversion step of converting the I data or the SDDI data into parallel SDI data or SDDI data, and the data transmission method based on the data identification data of the SDDI data output from the first parallel conversion means The above data at
A data identification step of detecting whether the data is DDI data and outputting data indicating the detection result, and the SDI data or SDDI obtained in the first parallel conversion step.
A first input step of inputting data, a second input step of inputting the SDI data or SDDI data output from an external device different from the data transmission device, and a first input terminal. A first output step of outputting the data input from the first and a second output step of selectively outputting the data input in the first input step or the second input step. A selection step, a control step of selectively controlling input / output in the selection step based on data indicating a detection result obtained in the data identification step and set data set, and a control step of the second selection step. The SDI output in the second output step
A second serial conversion step of converting data or SDDI data into serial data, wherein the S is obtained in the second serial conversion step of the data receiving method.
The DI data or SDDI data is output to another data receiving device different from the data receiving device that processes the data receiving method.

[0015]

The first transmission packet is a transmission packet used in the SDDI system, and the transmission packet is located at a predetermined position in a control portion of the transmission packet.
The packet type data indicating that the packet is of the DI type is included.
Can be identified as a transmission packet.
In the data portion of the first transmission packet, a mixture of fixed length data and variable length data is allowed.

The second transmission packet is a transmission packet used in the SDI system. The control part of the second transmission packet does not include the packet type data of the SDDI transmission packet. The data portion contains only fixed length data. The receiving means receives the serial transmission signal from the transmission path and converts the transmission signal into a parallel signal which is easy to process by, for example, serial / parallel conversion.

The packet type data detecting means detects, for example, SDDI type packet data at the position indicated by the synchronization signal in the signal received by the receiving means and converted into a parallel signal. The packet separating means outputs a transmission packet including the packet type data of the SDDI method as a first transmission packet from a predetermined output terminal, and outputs a transmission packet not including the packet type data of the SDDI method to the second transmission packet. It is output as a packet from another output terminal and separated and output.

[0018]

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described.
First, prior to the description of the data transmission system (data transmission / reception device) 1 (FIG. 4) according to the present invention, it is used as a transmission system of a transmission signal received by the video signal server system 1 with reference to FIGS. The signal formats of the SDI system and the SDDI system will be described. FIG. 1 is a diagram showing a frame configuration of the SDI system, and FIG. 1A is a diagram showing a frame configuration of a video signal of the SDI system, and FIG.
FIG. 3 is a diagram showing a configuration of an SDI transmission packet;
(C) is a diagram showing the data rate of the SDI video signal transmitted.

As shown in FIGS. 1A and 1B, a frame of a video signal of the SDI system is 525 (6
25) lines, 10 bits per line in the horizontal direction x
1716 (1728; 625 line mode) has a word structure. In each line, four words from the first word to the fourth word of the line indicate the end of the active video part ACV, and a separation code EAV (End of Active) for separating the active blank part from the horizontal blanking part.
Video).

26 from the 5th word to the 272nd word
The eight words (the 280 words from the fifth word to the 284th word) are horizontal blanking sections, but the ancillary data section ANC may include auxiliary data and audio data. Four words from the 273rd word to the 276th word (similarly, the 284th word to the 288th word) include a separation code SAV (Start of Active Video) indicating the start of the active video section ACV.
o). Words 277 through 1716
1440 words up to the word (similarly, the 288th word to the 1728th word) are used as an active video unit ACV for transmitting a video signal or the like.

As shown in FIG. 1A, in the vertical direction, nine lines from the first line to the ninth line (similarly, 24 lines from the first line to the twenty-fourth line) are vertically blanked. Used as part VBK.
Only in the case of the 525-line mode, ten lines from the tenth line to the nineteenth line are used as the optional blanking unit OBK. 244 lines from line 20 to line 263 (288 lines from line 25 to line 312) are the first line.
Field used as the active video portion ACV ₁ of the. The active video portion ACV ₁ of the first field contains the video signal of the first field.

Only in the case of the 525 line mode,
Nine lines from the line to the 272th line (25 lines from the 313th line to the 337th line) are used as the vertical blanking unit VBK. The tenth line from the 273rd line to the 282nd line is used as an optional blanking unit OBK. 243 lines from line 283 to line 526 (also 288 lines from line 338 to line 625)
It is used as the active video portion ACV ₂ of the second field. Active video part A of the second field
CV ₂ includes the video signal of the second field. The SDI video signal having the frame configuration shown in FIGS. 1A and 1B is 270 Mbp, as shown in FIG.
s is converted into a serial transmission signal and transmitted and received between the components of the data transmission apparatus 1.

Hereinafter, SDDI will be described with reference to FIGS.
The signal format of the system will be described. Figure 2 shows the SDDI
3A and 3B are diagrams showing a frame configuration and the like of the system, and FIG.
It is a diagram showing a frame configuration of a video signal of the DI system,
(B) is a diagram showing a configuration of a transmission packet of the SDDI system, and (C) is a diagram showing a data speed of a video signal of the SDDI system to be transmitted.

As shown in FIGS. 2A and 2B, the SDD
Each line of the I-system video signal is, like each line of the SDI system video signal, one line per line in the horizontal direction.
0 bits x 1724 (1716) words, 5 vertically
25 (625) lines, and the SDI separation codes SAV, EAV, ancillary data section ANC and active video sections ACV ₁ , ACV shown in FIG.
₂ includes separation codes SAV and EAV, ancillary data section ANC, and payload section PAD (data section DT), respectively. Further, at the end of the payload part PAD, a part of the ancillary data part ANC and the C part used for error detection and error correction of the payload part PAD part are used.
An RC code is added. However, unlike the SDI video signal, the SDDI video signal does not include audio data in the ancillary data portion ANC data, but includes audio data and video data in the payload portion.

Note that, as shown in FIG.
Frames of the video signal of the system do not include portions corresponding to the vertical blanking unit VBK and the optional blanking unit OBK of the SDI video signal shown in FIG. The SDDI video signal described above is
As shown in FIG. 2C, the signal is converted into a 270 Mbps serial transmission signal and transmitted and received between the components of the data transmission apparatus 1.

FIG. 3 is a diagram showing data included in the header portion of the ancillary data portion ANC of the SDDI transmission packet shown in FIG. As shown in FIGS. 3 (A) and 3 (B), it is located at the head of the ancillary data part ANC of the transmission packet of the SDDI system, and has three-word header flags (000h, 3FFh, 3FFh) and one-word data. ID (DATAID), AUX area, destination address (DESTINATION ADDRESS),
Source address (SOURCE DEVICE ADD)
RES) and checksum (CHECK SUM)
Each data is included. Of the above header data, D
The ATAID indicates whether the transmission packet is an SDDI transmission packet (01h) or an SDI transmission packet (00h). The checksum is used for error detection based on the checksum of the data of the frame. Used. The destination address and the source address are data used to identify the destination device to which the transmission packet is transmitted and the device that has transmitted the transmission packet.

As described above, since the input router device 20 and the output router device 40 perform routing by circuit switching, these addresses are not necessary in the data transmission device 1, but in the future, routing will be performed, for example, by AT.
This is added in consideration of performing routing by M-exchange or store-and-forward. The data length, frame configuration and data transmission speed of each line of the SDI video signal and the SDDI video signal are the same, and the SDI transmission packet and the SDDI transmission packet have commonality. By having them, the input router device 20 and the output router device 40 can handle them as equivalent data.

The header of the transmission packet of the SDDI system further includes block type data and the like, and the block type data indicates the type of data included in the video data portion. For example, when the video signal included in the video data portion and the audio data portion is compressed, the compression method (MPEG or the like) is used. When the video signal is not compressed, the fact is described. If data for a computer is included, this is indicated.

The configuration and operation of a data transmission system (data transmitting / receiving apparatus) 1 for transmitting an SDI signal and an SDDI signal using the same transmission line will be described below. FIG. 4 is a diagram showing the configuration of the data transmission system 1 according to the first embodiment of the present invention. As shown in FIG. 4, the data transmission system 1 includes a transmitting device 10 and a receiving device 2
0, and the transmission device 10 includes a selector circuit (S
EL) 100, FIFOs 102 and 122, a parallel / serial conversion circuit (P / S conversion circuit) 104, a control circuit (CPU) 110, and a serial / parallel conversion circuit (S / P conversion circuit) 120.
Is composed of an S / P conversion circuit 200, a packet type data detection circuit (DET) 202, FIFOs 204 and 220, a selector circuit (SEL) 206, a control circuit (CPU) 210, and a P / S conversion circuit 222.

The control circuit 110 controls each part of the transmission device 10 such as the selector circuit 100 in accordance with setting data input from outside such as video equipment connected to the transmission device 10. Under the control of the control circuit 110, the selector circuit 100 inputs SDI input data (SDI data) or SDDI input data (S
DDI data) and outputs it to the FIFO 102 as a 10-bit parallel transmission signal. FIF
O 102 buffers the transmission signal and outputs it to P / S conversion circuit 104. P / S conversion circuit 104
Is a 10-bit parallel transmission signal (FIG. 1 (B),
FIG. 2 (B) shows a 1-bit serial transmission signal (FIG. 1).
(C), FIG. 2 (C)) and the transmission path (SDI / SD
DI).

The S / P conversion circuit 200 receives the transmission signal transmitted from the transmission device 10, converts the transmission signal into a 10-bit parallel reception signal, and outputs the signal to the packet type data detection circuit 202. The packet type data detection circuit 202 determines whether the content of the DATAID position shown in FIG. 3B of the transmission packet of the received signal is the packet identification data 01h indicating that the transmission packet is of the SDDI system. No, and outputs the detection result to the control circuit 210. Further, the packet type data detection circuit 202 outputs the received signal to the FIFO 204 as it is. Further, for example, the packet type data detection circuit 202 determines the contents of the type data and
It is also possible to configure so that the difference between the I systems can be detected, and to perform different control between the SDDI systems. The control circuit 210 controls each part of the receiving device 20 such as the selector circuit 206 based on the detection result of the packet type data detection circuit 202 and the like.

[0032] The FIFO 204 buffers the received signal and outputs it to the selector circuit 206. The selector circuit 206 outputs a reception signal when the packet type data detection circuit 202 does not detect the packet identification data indicating that the transmission packet is of the SDDI system according to the control of the control circuit 210. Terminal a
Side, and outputs the received signal as SDDI data from the output terminal b when detecting packet identification data indicating that the packet for transmission is of the SDDI system.

The receiving device 20 sends a synchronization signal (REF) to the transmitting device 10 by the FIFO 220 and the P / S conversion circuit 222. The transmitting device 10 has
The synchronization signal is reproduced by the P conversion circuit 120 and the FIFO 122 and used for internal processing and the like. This synchronization signal defines, for example, the transmission timing of the transmission packet. In the data transmission system 1, the receiving device 20 corresponds to the data receiving device according to the present invention, and the S / P conversion circuit 2
00 corresponds to the receiving means according to the present invention, the packet type data detecting circuit 202 corresponds to the packet type data detecting means according to the present invention, and the selector circuit 206 corresponds to the packet separating means according to the present invention.

Hereinafter, the operation of the data transmission system 1 will be described. The transmitting device 10 is provided with the SDI method or the SD
SDI data or SDDI data in a 10-bit parallel format input from a video device supporting the DI system is
Selected by the selector circuit 100, F
Input to the IFO 102. The FIFO 102 buffers the transmission signal and outputs it to the P / S conversion circuit 104 at a timing synchronized with the synchronization signal. The P / S conversion circuit 104 converts the transmission signal into a 1-bit serial transmission signal and transmits the transmission signal to the reception device 20 via a transmission path.

The S / P conversion circuit 200 receives the transmission signal, converts it into a 10-bit parallel reception signal, and outputs it to the packet type data detection circuit 202. The packet type data detection circuit 202 detects the transmission packet from the received signal, detects the content of the position of DATAID shown in FIG. 3B, and outputs the detection result to the control circuit 210. The FIFO 204 uses the selector circuit 206
When the signal of the DI system and the signal of the SDDI system are separated, the data is buffered so that the beginning of the transmission packet does not break and output to the selector circuit 206. The selector circuit 206 converts the transmission packet into the D shown in FIG.
Under the control of the control circuit 210 according to the content of the ATAID, the SDI data and the SDDI data are separated and output.

According to the data transmission system 1, SDI data and SDDI data can be transmitted on the same transmission path. Therefore, the FIFO, P / S conversion circuit, and S / P conversion circuit required in two sets in the data transmission apparatus 8 shown as the conventional example can be reduced to one set, and the apparatus cost is low. In addition, according to the data transmission system 1, the number of transmission lines conventionally required two can be reduced to one, so that the cost of the transmission line can be reduced,
Laying work is also simplified. Further, according to the data transmission system 1, the receiving device 20 can automatically identify and separate the SDI and SDDI transmission packets from each other. Are easily mixed in the same video processing system.

[0037]

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described.
FIG. 5 is a diagram showing the configuration of the data transmission system (data transmission / reception device) 3 according to the second embodiment of the present invention. FIG. 6 shows the data transmission / reception devices 32a-3 shown in FIG.
It is a figure showing composition of 2d. As shown in FIG. 5, the data transmission system 3 according to the present invention includes four data transmission / reception devices 32a to 32d, and an SDI signal and an SDDI signal are transmitted between the data transmission / reception devices 32a to 32d.
It is configured to transmit a signal of the system in a mixed manner on the same transmission path.

The data transmitting / receiving devices 32a to 32d have the same configuration and perform the same operations. As shown in FIG. 6, the data transmission / reception devices 32a to 32d (hereinafter, if these are not separately specified,
) Are S / P conversion circuits 320 and 350, respectively.
P / S conversion circuits 344, 362 Packet type data detection circuit 322, FIFOs 324, 340, 352, 36
0, a control circuit (CPU) 110 and a switch network 332, each of which receives SDI data or SD data from a transmission signal transmitted from another data transmission / reception device 32 in accordance with a video device connected thereto.
DI data is separated and supplied as signals VOUTa to VOUTd, or input signals VINa to VINd from a video device are transmitted to another data transmission / reception device 32, or transmission signals are relayed.

The S / P conversion circuit 320 operates as shown in FIG.
The same operation as the / P conversion circuit 200 is performed, the transmission signal transmitted from the other data transmission / reception device 32 is received, converted into a parallel reception signal, and output to the packet type data detection circuit 322. The packet type data detection circuit 322 performs the same operation as the packet type data detection circuit 202, detects the packet identification data of the received signal, outputs the detection result to the control circuit 330, and outputs the received signal to the FIFO 204 as it is. I do.

The FIFO 324 performs the same operation as the FIFO 204, buffers the received signal, and outputs it to the switch network 332. FIFO340
Performs the same operation as that of the FIFO 102, buffers the transmission signal input from the switch network 332, and outputs the transmission signal to the P / S conversion circuit 344. The control circuit 330 performs the same operation as the control circuit 110, and controls each part of the switch network 332 and the like according to setting data input from outside such as video equipment connected to each of the data transmitting / receiving devices 32.

S / P conversion circuit 350 and FIFO 35
2 performs the same operation as the S / P conversion circuit 120 and the FIFO 122, and receives a synchronization signal from another data transmission / reception device 32. The FIFO 360 and the P / S conversion circuit 362 are
And transmits a synchronization signal to the other data transmission / reception devices 32.

The switch network 332 switches signals between input terminals a and c and output terminals b and d. Specifically, the switch network 332 includes the control circuit 330
SDI or SDDI input signals VINa to V
INd is output as a transmission signal from an output terminal b, and SDI data or S
DDI data is separated and output signal VOU is output from output terminal d.
The signal is output as Ta to VOUTd, and the transmission signal input from the input terminal a is directly output as a transmission signal from the output terminal b.

The operation of the data transmission system 3 and the data transmission / reception device 32 shown in FIGS. 5 and 6 will be described below. In the data transmission system 3, a transmission signal is transmitted from the data transmission / reception device 32a to the data transmission / reception device 32b, from the data transmission / reception device 32b to the data transmission / reception device 32c, and so on. Data transmission / reception devices 32a-3
2d is an SDI corresponding to each connected video device.
Receiving device 2 shown in FIG.
As with 0, while extracting from the transmission signal and supplying it,
The transmission signal which has not been extracted is transmitted to the next data transmitting / receiving
Relay to. Also, the data transmitting / receiving devices 32a to 32a
Between 2d, transmission and reception of the synchronization signal REF are also performed as shown in FIG.

By configuring the data transmission system 3 in this way, a large-scale video processing system can be easily configured by mixing video equipment compatible with the SDI system and video equipment compatible with the SDDI system. An effect similar to that of the data transmission system 1 shown in the first embodiment can be obtained.

The number of the data transmission / reception devices 32 is not limited to four, and the data transmission system 3 can be constituted by an arbitrary number. Further, the connection relationship is not limited to that shown in FIG. 5. For example, the data transmission / reception device 32 is configured to be able to transmit / receive data via a plurality of transmission paths, and the data transmission / reception devices 32 a and 32 c and the data transmission / reception device 32b,
A transmission line that directly connects between 32d may be provided. By adding a function of detecting destination data to the data transmitting / receiving device 32, it is possible to realize a video processing system capable of transmitting arbitrary data to a desired device. In addition to adding such functions,
An exchange function may be added to the data transmission / reception device 32 so that a more complicated system can be configured.

As described above, the data receiving apparatus of the present invention and
Although the embodiment has been described with respect to the data transmission / reception device and these methods, the above-described configuration and function can be applied to a video device. Further, a video signal processing method in which the above-described method is applied to a video device can be provided.

[0047]

As described above, according to the data receiving apparatus, the data transmitting / receiving apparatus, the video equipment, and the methods according to the present invention, the SDI video equipment and the SDDI video equipment coexist. In a video processing system, SDI signals and SDDI signals can be mixed and transmitted / received on the same transmission path between these video devices.

Further, according to the data receiving apparatus, the data transmitting / receiving apparatus, the video equipment, and the methods according to the present invention, the SDI signal and the SDDI signal transmitted on the same transmission path are automatically converted. It is possible to identify and separate the packets for each transmission packet, and supply them to the corresponding video equipment.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams illustrating a frame configuration of an SDI system, and FIG. 1A is a diagram illustrating a frame configuration of a video signal of the SDI system, and FIG. 1B is a diagram illustrating a configuration of a transmission packet of the SDI system; (C) is a diagram showing the data rate of the transmitted SDI video signal.

FIGS. 2A and 2B are diagrams illustrating a frame configuration of the SDDI system, and FIG. 2A is a diagram illustrating a frame configuration of a video signal of the SDDI system, and FIG. 2B is a diagram illustrating a configuration of a transmission packet of the SDDI system; And (C) shows the transmitted SDDI
FIG. 4 is a diagram showing a data rate of a video signal of a system.

FIG. 3 is a diagram showing data included in an ancillary data part ANC of the transmission packet of the SDDI system shown in FIG. 2;

FIG. 4 is a diagram showing a configuration of a data transmission system according to the present invention in the first embodiment.

FIG. 5 is a diagram showing a configuration of a data transmission system according to the present invention in a second embodiment.

FIG. 6 is a diagram showing a configuration of the data transmitting / receiving device shown in FIG.

FIG. 7 is a diagram showing a configuration of a conventional data transmission device.

[Explanation of symbols]

1, 3 ... data transmission system, 10 ... transmission device, 20 ...
Receiving device, 32, 32a to 32d ... data transmitting / receiving device,
100, 206 ... selector circuit, 102, 122, 20
4,220,324,340,352,360 ... FIF
O, 104, 222, 344, 362... P / S conversion circuit, 120, 200, 320, 350... S / P conversion circuit, 202, 332.
10, 210, 330 ... control circuit, 332 ... switch network

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 5/765 H04N 5/91 L 7/00 7/00 Z

Claims (20)

[Claims] 1. An active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, and an end synchronization code area in which an end synchronization code of the active video area is inserted. And an ancillary data area into which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is SDI data in serial form in a first transmission packet, which is configured to be located between a data area and an active video area, or the active video area and the start code area of the first transmission packet. Data including video data, which is located at the same position as the end synchronization code area and the ancillary data area, A second transmission packet including a payload area to be inserted, the start code area, the end synchronization code area, and an ancillary data area into which data including data identification data is inserted. Serial-to-parallel conversion means for receiving input SDDI data and converting the input serial SDI data or SDDI data into parallel data; and the parallel SDDI converted by the conversion means.
From the data identification data into which the data is input and inserted into the ancillary data area of the second transmission packet, it is determined whether the input data is the SDI data or the SDDI data, and data indicating the detection result indicated by the detection is shown. Detection means for outputting, data indicating the detection result of the detection means being input, control means for performing control processing based on the input data, and the SD of the parallel data output from the conversion means
When the I data or the SDDI data is input,
The input SDI is connected to a first output terminal for outputting DI data and a second output terminal for outputting the SDDI data.
Selection means for selectively outputting data or the SDDI data, respectively, wherein the control means converts the SDI data or the SDDI data to the first data based on the data indicating the detection result, respectively.
Alternatively, the data receiving device controls the selection means so as to output to the second output terminal. 2. The data processing apparatus according to claim 1, further comprising a third output terminal for outputting the SDI data and the SDDI data in the parallel format, and wherein the data receiving device further includes a third output terminal. Parallel format SDI data and SDDI
Data is input, and the input parallel format S
Converts DI data and SDDI data to serial SDI
A serial-to-serial conversion unit that converts the data into SDDI data and outputs the data, and the control unit converts the SDI data or SDDI data based on the data indicating the detection result from the detection unit and the set setting data. Controlling the selection means to selectively output the first or second output terminal or the SDI data and the SDDI data to the third output terminal; 2. The data receiving device according to claim 1, wherein the serial SDI data and the SDDI data are output to another data receiving device. 3. The selecting means further has an input end to which parallel-format SDI data and SDDI data output from an external device located outside the data receiving device are input. The parallel-format SDI data or SDDI data output from the serial-parallel conversion means based on the data indicating the detection result and the set data, or the parallel-format SDI data and SDDI data input from the input terminal. 3. The data receiving device according to claim 2, wherein the data receiving device controls the selecting means to selectively output data from the third output terminal. 4. The data receiving apparatus according to claim 1, wherein the data identification data is identification data indicating whether the transmitted data is SDI data or SDDI data. 5. An active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, and an end synchronization code area in which an end synchronization code of the active video area is inserted. And an ancillary data area into which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is SDI data in serial form in a first transmission packet, which is configured to be located between a data area and an active video area, or the active video area and the start code area of the first transmission packet. Data including video data, which is located at the same position as the end synchronization code area and the ancillary data area, A second transmission packet including a payload area to be inserted, the start code area, the end synchronization code area, and an ancillary data area into which data including data identification data is inserted. Serial-to-parallel conversion means for receiving input SDDI data and converting the input serial SDI data or SDDI data into parallel data; and the parallel SDDI converted by the conversion means.
It detects whether the input data is the SDI data or the SDDI data from the data identification data inserted into the ancillary data area of the second transmission packet when the data is input, and outputs data indicating the detection result indicated by the data. Detecting means for performing detection, control means to which data indicating the detection result of the detecting means is input, and the SD of the parallel data output from the converting means.
When the I data or the SDDI data is input,
The input SDI is connected to a first output terminal for outputting DI data and a second output terminal for outputting the SDDI data.
Selection means for selectively outputting data or the SDDI data, respectively, wherein the control means converts the SDI data or the SDDI data to the first data based on the data indicating the detection result, respectively.
Alternatively, the video device controls the selection means so as to output to the second output terminal. 6. The selecting means further includes a third output terminal for outputting the SDI data and the SDDI data in the parallel format, and the data receiving device further includes a third output terminal output from the third output terminal. Parallel format SDI data and SDDI
Data is input, and the input parallel format S
Converts DI data and SDDI data to serial SDI
A serial-to-serial conversion unit that converts the data into SDDI data and outputs the data, and the control unit converts the SDI data or SDDI data based on the data indicating the detection result from the detection unit and the set setting data. Controlling the selection means to selectively output the first or second output terminal or the SDI data and the SDDI data to the third output terminal; 6. The video device according to claim 5, wherein the serial SDI data and the SDDI data are output to another data receiving device. 7. The selecting means further has an input terminal to which parallel-format SDI data and SDDI data output from an external device located outside the data receiving apparatus are input. The parallel-format SDI data or SDDI data output from the serial-parallel conversion means based on the data indicating the detection result and the set data, or the parallel-format SDI data and SDDI data input from the input terminal. 7. The video device according to claim 6, wherein the control unit controls the selection unit to selectively output data from the third output terminal. 8. The video device according to claim 5, wherein the data identification data is identification data indicating whether the transmitted data is SDI data or SDDI data. 9. A data transmission / reception device having a data transmission device and a data reception device connected via a data transmission path, the data reception device comprising: an active video area into which digital video data is inserted; It is composed of a start code area in which the start synchronization code of the active video area is inserted, an end synchronization code area in which the end synchronization code of the active video area is inserted, and an ancillary data area in which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, the start code area is configured to be located between the ancillary data area and the active video area, The SDI data in the parallel format located in the first transmission packet, or the SDI data of the first transmission packet. Active video area, the start code area, the end synchronization code area, and a payload area in which data including video data is inserted at the same position as the ancillary data area, the start code area, and the end synchronization code. Parallel SDDI data located in the second transmission packet, which is composed of an area and an ancillary data area into which data including data identification data is inserted, is selectively input to the parallel SDI data. Or first selecting means for outputting SDDI data; first serial converting means for serially converting the parallel format SDI data or SDDI data output from the first selecting means; and the first converting means Data transmitting means for transmitting the data converted in the data transmission path to the data transmission path; A first parallel conversion means for converting the serial-format SDI data or the SDDI data input from the data transmission device and input via the data transmission path into parallel SDI data or SDDI data; The SDD output from the first parallel conversion means
A data identification unit that detects whether the data from the data transmission device is SDDI data from the SDI data based on the data identification data of the I data, and outputs data indicating the detection result; The above output SDI
A first input terminal to which data or the SDDI data is input; a second input terminal to which the SDI data or SDDI data output from an external device different from the data transmission device is input; A first output terminal for outputting the data input from the first input terminal, a second output terminal for selectively outputting the data input from the first input terminal or the second input terminal; The second with
Selection means, and control means for selectively controlling the input / output of the selection means based on the data indicating the detection result output from the data identification means and the set setting data. Second serial conversion means for converting the SDI data or SDDI data output from the second output end into serial data, wherein the SDI output from the second serial conversion means of the data receiving device is provided. A data transmitting / receiving device, wherein data or SDDI data is output to another data receiving device of the data receiving device. 10. The data identification data according to claim 1, wherein said serially converted data transmitted is said SDI data.
10. Identification data indicating whether the data is DDI data.
A data transmitting / receiving device according to claim 1. 11. An active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, and an end synchronization code area in which an end synchronization code of the active video area is inserted. And an ancillary data area into which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is SDI data in serial form in a first transmission packet, which is configured to be located between a data area and an active video area, or the active video area and the start code area of the first transmission packet. Data including video data, located at the same position as the end synchronization code area and the ancillary data area The serial number in the second transmission packet is composed of a payload area to be inserted, the start code area, the end synchronization code area, and an ancillary data area into which data including data identification data is inserted. Inputting SDDI data in the format; and inputting SDI data or SD in the serial format
A serial / parallel conversion step of converting DI data into parallel data; and the parallel format S converted in the conversion step.
From the data identification data into which the DDI data is input and inserted into the ancillary data area of the second transmission packet, the input data is the SDI data or the SDD
A detection step of detecting whether the data is I data and outputting data indicating a detection result indicated by the detection data; and a control step of receiving data indicating the detection result obtained in the detection step and performing control based on the input data; The above S of the parallel data obtained in the above conversion step
A first output terminal for receiving DI data or the SDDI data and outputting the SDI data;
The input S is input to a second output terminal from which the I data is output.
And a selecting step of selectively outputting DI data or the SDDI data. In the controlling step and the selecting step, the SDI data or the SDD is selected based on data indicating the detection result.
A data receiving method, wherein I data is outputted to each of the first and second output terminals. 12. The data receiving method according to claim 3, further comprising:
The parallel-type SDI data and SDDI data output from the output terminal of the above-mentioned are input, and the parallel-type SDI data and SDDI data are converted into serial-type SDI data and SDDI data and output. A conversion step, wherein the control step is based on the data indicating the detection result obtained in the detection step and the set setting data.
I data or SDDI data is selectively output to the first or second output terminal, or the SDI data and SDDI data is output to a third output terminal, and the serial data obtained in the parallel / serial conversion step is output. 12. The method according to claim 11, further comprising a step of outputting the SDI data and the SDDI data in a format to another data receiving apparatus different from the data receiving apparatus in which the data receiving method is performed.
Data reception method described. 13. In the selecting step, the SDI data and the SDDI data are input from an input terminal to which parallel SDI data and SDDI data output from an external device located outside the data receiving device are input; In the control step and the selection step, the parallel format SDI data or SDDI data obtained in the serial / parallel conversion step based on the data indicating the detection result and the set data, or from the input terminal. The data receiving method according to claim 12, wherein the input parallel SDI data and SDDI data are selectively output from the third output terminal. 14. The data receiving method according to claim 11, wherein the data identification data is identification data indicating whether the transmitted data is SDI data or SDDI data. 15. An active video area in which digital video data is inserted, a start code area in which a start synchronization code of the active video area is inserted, and an end synchronization code area in which an end synchronization code of the active video area is inserted. And an ancillary data area into which data including auxiliary data is inserted. The ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is SDI data in serial form in a first transmission packet, which is configured to be located between a data area and an active video area, or the active video area and the start code area of the first transmission packet. Data including video data, located at the same position as the end synchronization code area and the ancillary data area The serial number in the second transmission packet is composed of a payload area to be inserted, the start code area, the end synchronization code area, and an ancillary data area into which data including data identification data is inserted. Inputting SDDI data in the format, and serial SDI input in the inputting process
A serial / parallel conversion step of converting data or SDDI data into parallel data, and the parallel format SDDI converted in the conversion step
It detects whether the input data is the SDI data or the SDDI data from the data identification data inserted into the ancillary data area of the second transmission packet when the data is input, and outputs data indicating the detection result indicated by the data. A detection step of inputting data indicating a detection result obtained by the detection step, and performing a control process based on the data; and the SDI data or the SDDI of the parallel data obtained in the conversion step. When the data is input, the SDI
A first output terminal from which data is output, and a selection step of selectively outputting the input SDI data or the SDDI data to a second output terminal from which the SDDI data is output, In the control step and the selection step, the SDI data or the SDD is determined based on the data indicating the detection result.
A video signal processing method, comprising: outputting I data to the first or second output terminal. 16. The video signal processing method according to claim 16, further comprising a third output terminal for outputting the parallel format SDI data and SDDI data, wherein the video signal processing method further comprises a third output terminal. Parallel format SDI data and SDD
I data is input, and the input parallel SDI data and SDDI data are converted to serial SD data.
A parallel-serial conversion step of converting the data into I data and SDDI data and outputting the converted data. In the control step and the selection step, based on the data indicating the detection result obtained in the detection step and the set setting data, The SDI data or the SDDI data is selectively output to the first or second output terminal, or the SDI data and the SDDI data are selectively output to a third output terminal. The video signal processing method according to claim 15, wherein the SDI data and the SDDI data in the format are output to another video device other than the video device in which the video signal processing method is processed. 17. The selecting step further comprises: inputting the SDI data and SDDI data from an input terminal to which parallel SDI data and SDDI data output from an external device located outside the data receiving device are input. In the control step and the selection step, the parallel format SDI data or SDDI data output from the serial / parallel conversion means based on the data indicating the detection result and the set data, or
17. The video signal processing method according to claim 16, wherein the SDI data and the SDDI data in the parallel format input from the input terminal are selectively output from the third output terminal. 18. The video signal processing method according to claim 15, wherein said data identification data is identification data indicating whether the transmitted data is SDI data or SDDI data. 19. A data transmission / reception method for transmitting and receiving data via a data transmission path, comprising a data transmission method and a data reception method, wherein the data transmission method includes an active mode in which digital video data is inserted. A video area, a start code area into which the start synchronization code of the active video area is inserted, an end synchronization code area into which the end synchronization code of the active video area is inserted, and an ancillary into which data including auxiliary data is inserted. A data area, wherein the ancillary data area is located between the end synchronization code and the start synchronization code area, and the start code area is located between the ancillary data area and the active video area. SDI data in the parallel format located in the first transmission packet, or The active video area, the start code area, the end synchronization code area, and the payload area where data including video data is inserted at the same position as the ancillary data area of the transmission packet, and the start code area, A data input step of inputting parallel-format SDDI data located in a second transmission packet, the data input step comprising: the end synchronization code area; and an ancillary data area into which data including data identification data is inserted; A first selection step of selecting data input in the data input step and outputting the SDI data or SDDI data in the parallel format; and serializing the SDI data or SDDI data in the parallel format selected in the first selection step. A first serial conversion step of converting, and a conversion in the first conversion step. A data transmitting step of transmitting the converted data to the data transmission path, wherein the data receiving method comprises: transmitting the converted data in the data transmitting step, and inputting the serial SDI data through the data transmission path. Alternatively, the SDDI data is converted to parallel SDI data or SD
A first parallel conversion step of converting the data into DI data; and the SDD output from the first parallel conversion means.
A data identification step of detecting whether the data in the data transmission method is SDDI data from the SDI data based on the data identification data of the I data, and outputting data indicating the detection result; and a first parallel conversion step. The above SD
A first input step in which I data or the SDDI data is input, a second input step in which the SDI data or SDDI data output from an external device different from the data transmission device is input, A first output step of outputting the data input from a first input terminal, and a second output step of selectively outputting the data input in the first input step or the second input step A second selecting step having the following steps: a control step of selectively controlling input / output in the selecting step based on data indicating a detection result obtained in the data identifying step and set setting data; A second serial conversion step of converting the SDI data or SDDI data output in the second output step of the selection step into serial data. The second of said SDI data or SDDI data obtained in the serial converting step of receiving method is output to other different data receiver and a data receiving apparatus the data receiving method is processed, the data transmission and reception method. 20. The data identification data according to claim 1, wherein said serially converted data transmitted is said SDI data.
2. Identification data indicating whether the data is DDI data.
10. The data transmission / reception method according to 9.