JP6220258B2 - Video data transmission apparatus and transmission method - Google Patents

Description

  The present invention relates to a video / audio signal transmission apparatus, and in particular, multiplexes and transmits a plurality of high-definition video signals of 10G-SDI (10 Gbps Serial Digital Interface) or a plurality of HD-SDIs (High Definition-Serial Digital Interface). The present invention relates to a transmission apparatus and a transmission method.

  In conventional general high-vision, a technique of quantizing the luminance / color difference signal (YPbPr) of each pixel constituting an image with 10 bits or less has been mainly used. Therefore, SMPTE (American Film and Television Engineers Association) has defined the 292M standard, which is an interface standard with 10 bits as one word, HD-SDI (High Definition-Serial Digital Interface) or 1.5G-SDI (1.5 Gbps). -Serial Digital Interface) has been widely used to connect studio equipment.

  In addition, due to the demand for higher definition and the advancement of imaging devices, computer graphics technology, etc., color signals (RGB 4: 4: 4 system) that do not perform 12-bit quantization or the number of spatial samples are used. Therefore, ST 372-2011 standard (dual link HD-SDI) for bundling two HD-SDIs and transmitting them in parallel was established. In addition, 3G-SDI (3 Gbps-Serial Digital Interface) of ST424-2012 which serializes this signal has come to be used.

  Furthermore, ST435-1-2012, ST435-2-2012, with the background of the appearance of 4K video that has about 4 times the number of pixels of Hi-Vision and Super Hi-Vision (8K video) that has 16 times the number of pixels of Hi-Vision. ST435-3-2012 was established, and 10 G-SDI (10 Gbps-Serial Digital Interface), which is a 10 Gbps standard, was standardized (for example, Patent Document 1 and Non-Patent Document 1). In the ST435-2-2012 standard that defines a method for mapping auxiliary data such as images and audio to transmission frames, modes A to D are defined in which the number of HD-SDIs accommodated and the mapping method are different. In particular, since Mode D can efficiently accommodate four pairs (8ch) of dual link HD-SDI with frame rates of 30 Hz and 29.97 Hz and 12-bit quantization, it is expected to be applied to an interface for Super Hi-Vision. . However, the mode D signal is not 8B10B encoded with respect to some data, and there is a possibility that a direct current component due to the continuation of the same code of transmission data may occur, and there is a risk of error in identification of the code and error in reception. There is.

  On the other hand, in the communication field, standardization of 100 Gigabit Ethernet (registered trademark) has been completed, and transmission of about 26 Gbps per wavelength is performed in a standard using a single mode fiber. Therefore, an optical device and electrical device compatible with high-speed transmission of 26 Gbps Devices are being put into practical use one after another. As a new transmission method using these devices, a 26 Gbps interface for video transmission capable of accommodating two 10G-SDI signals has been proposed (for example, Non-Patent Documents 2 and 3).

  In Non-Patent Documents 2 and 3, mapping is performed from two 10G-SDI lines to 16 basic streams, and the 16 basic streams are multiplexed to generate one 25 Gbps stream. For video data and control signals, a 90-bit data block is formed by setting two adjacent channels as a set, and all channels of the basic stream are multiplexed by repeating the block. For ancillary data, only odd channels are multiplexed by repeating 50-bit data blocks.

  If the techniques of Non-Patent Documents 2 and 3 are used, when transmitting a large-capacity video signal, it is possible to reduce the number of signal lines in parallel, so that it is possible to realize future miniaturization of the interface. The technologies of Non-Patent Documents 2 and 3 are proposals related to a general-purpose serialization method of 8 pairs of dual link HD-SDI signals, and horizontal auxiliary area (Horizontal Ancillary, hereinafter referred to as HANC) data up to 8 HD-SDI signals. One of the features is that it can be transmitted.

Japanese Patent No. 4702425

SMPTE ST435-2-2012 2012 IEICE General Conference D-11-60 2012 IEICE General Conference D-11-61

  The technologies of Non-Patent Documents 2 and 3 can transmit HANC data up to 8 HD-SDI signals when serializing 8 pairs of dual link HD-SDI signals, but in the first place the mode D signal of 10G-SDI is HD -Since only one signal of HANC data of SDI signal is included, even when two 10G-SDI signals are added, HANC data is only two signals. Therefore, of the accommodation area for 8 HANC data signals, only 2 signals are actually used, and 6 signals become redundant data such as no signal. This redundant data reaches about 4% in the transmission rate of 26 Gbps.

  In general, the higher the signal, the higher the frequency band that must be transmitted, and the lower the loss of characteristics to the high frequency band, and the use of a coaxial cable. Further, in the case of optical transmission, transmission errors are likely to occur due to signal distortion due to chromatic dispersion, and the required OSNR (optical signal power to noise power ratio) increases, so that the distance that can be transmitted is shortened. It will occur. Therefore, it is important to remove redundant data, reduce the amount of data, and suppress the necessary transmission rate as the signal requires high-speed transmission.

  For the above reasons, the techniques of Non-Patent Documents 2 and 3 are not efficient interfaces when used in combination with a system using a 10G-SDI mode D signal such as a super high-definition signal. In addition, when a 10G-SDI mode D signal is used, the problem of generating a DC component must be solved.

  Therefore, an object of the present invention made in view of the above problems is to use a plurality of 10G-SDIs or a plurality of HD-SDIs as an interface for high-definition video equipment such as 4K video and Super Hi-Vision. Achieves multiplexing and high-speed signal multiplexing to reduce the number of parallel transmission signals, and does not cause excessive speed increases that lead to higher material costs and shorter transmission distances. And a transmission method are provided.

  In order to solve the above problems, a transmission apparatus according to the present invention is a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals as inputs and multiplexes them into one signal for transmission. The effective pixel data of the SDI signal is divided by the word separation unit that separates and distributes the Odd Basic Stream, which is a self-synchronized scrambled signal, and the Even Basic Stream, which is an 8B10B encoded signal, and the word separation unit. An 8B10B encoding unit that performs 8B10B encoding on the Odd Basic Stream; and an output signal including the Even Basic Stream from the word separation unit from the plurality of input processing units. And a multiplexing unit that receives the output signals from the 8B10B encoding unit and synchronizes them to perform time division multiplexing.

  In order to solve the above-described problem, a transmission apparatus according to the present invention is a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals, multiplexes them into one signal, and transmits the signals. For the effective pixel data of the 10G-SDI signal, a word separation unit that separates and distributes an Odd Basic Stream that is a self-synchronized scrambled signal and an Even Basic Stream that is an 8B10B encoded signal, and the word separation unit An 8B10B decoding unit that performs 8B10B decoding on the distributed Even Basic Stream; a word multiplexing unit that time-division-multiplexes an output signal including the Odd Basic Stream from the word separation unit and an output signal of the 8B10B decoding unit; A plurality of input processing units comprising: an 8B10B encoding unit that performs 8B10B encoding on an output signal of the word multiplexing unit; And a multiplexing unit that receives output signals from the plurality of input processing units and synchronizes them to perform time division multiplexing.

  In order to solve the above-described problem, a transmission apparatus according to the present invention is a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals, multiplexes them into one signal, and transmits the signals. For the effective pixel data of the 10G-SDI signal, a word separation unit that separates and distributes an Odd Basic Stream that is a self-synchronized scrambled signal and an Even Basic Stream that is an 8B10B encoded signal, and the word separation unit An 8B10B decoding unit that performs 8B10B decoding on the distributed Even Basic Stream, and an output signal including the Odd Basic Stream from the word separation unit from the plurality of input processing units. A multiplexing unit that receives the output signal from the 8B10B decoding unit, synchronizes them and time-division multiplexes, and the output signal of the multiplexing unit And an 8B10B encoding unit that performs 8B10B encoding.

  In order to solve the above-described problem, a transmission apparatus according to the present invention is a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals, multiplexes them into one signal, and transmits the signals. A plurality of input processing units that directly output Odd Basic Stream, which is a self-synchronized scrambled signal, and Even Basic Stream, which is an 8B10B encoded signal, for the effective pixel data of the 10G-SDI signal; It has a multiplexing unit that receives an output signal from an input processing unit and synchronizes them and time-division multiplexes, and an 8B10B encoding unit that performs 8B10B encoding on the output signal of the multiplexing unit.

  In order to solve the above problems, the transmission apparatus according to the present invention provides a plurality of sets of four pairs of dual-link HD-SDI (High Definition-Serial Digital Interface) signals corresponding to 10 G-SDI (10 Gbps Serial Digital Interface) signals. In a transmission apparatus that multiplexes the signal into one signal and transmits the same, a parity bit removing unit that removes a parity bit from the B channel of the four pairs of dual link HD-SDI signals, and the dual link HD-SDI HANC removal unit for removing HANC data from 2 channels to 8 channels of signal, and receiving an output signal from the plurality of input processing units and the plurality of input processing units, synchronizing them and time division multiplexing A multiplexing unit, and an 8B10B encoding unit that performs 8B10B encoding on the output signal of the multiplexing unit. Features.

  In order to solve the above problems, a transmission method according to the present invention includes a plurality of 10G-SDI (10 Gbps serial digital interface) signals or a plurality of sets of four pairs of dual link HD-SDI (high definition-serial digital interface). In the transmission method in which the signals are multiplexed and transmitted in one signal, the multiplexed signals are related to the HANC data, and the first channel included in each 10G-SDI signal or each four pairs of dual link HD-SDI signals. A frame that transmits only HANC data is used, and before or after multiplexing processing, at least part of the effective pixel data of the 10G-SDI signal or the dual link HD-SDI is subjected to 8B10B encoding, and multiplexed. All the effective pixel data that has been processed is an 8B10B encoded signal. .

  By multiplexing and increasing the speed of signals, the number of parallel signals can be reduced and transmitted, so that downsizing of the device is realized. Compared with the methods of Non-Patent Documents 2 and 3, since no redundant data is added, a transmission apparatus can be realized without causing an excessive increase in transmission rate. Moreover, the problem which a direct-current component which existed in 10G-SDI mode D can be solved by 8B10B encoding.

  By suppressing the transmission rate, it is possible to reduce the cost of components such as substrates and cables, and in the case of optical transmission, in addition to being less susceptible to signal distortion due to wavelength dispersion, the required OSNR is reduced. Since it becomes low, the transmission distance can be lengthened.

It is a figure which shows the function structure of the transmission apparatus of Embodiment 1 by this invention. It is explanatory drawing of the word separation part of Embodiment 1 by this invention. It is explanatory drawing of the multiplexing part of Embodiment 1 by this invention. It is a figure which shows the function structure of the transmission apparatus of Embodiment 2 by this invention. It is a figure which shows the function structure of the transmission apparatus of Embodiment 3 by this invention. It is a figure which shows the function structure of the transmission apparatus of Embodiment 4 by this invention. It is a figure which shows the function structure of the transmission apparatus of Embodiment 5 by this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram illustrating a functional configuration of the transmission apparatus according to the first embodiment of the present invention. The 10G-SDI signals A and B are input signals to the transmission apparatus, and are input to the input A processing unit 11 and the input B processing unit 12, respectively. Here, the 10G-SDI signals A and B are signals of mode D of the ST435-2-2012 standard, and are signals having a speed of 10.692 Gbps or 10.692 / 1.001 Gbps. Since it is a mode D signal, only the HANC data of ch1 (channel 1) is included in the original eight HD-SDIs, and the HANC data of ch2 to ch8 is not already included.

  Since the internal configurations of the input A processing unit 11 and the input B processing unit 12 are the same, the configuration of the input A processing unit 11 will be described below. The input A processing unit 11 includes an O / E conversion unit 101, a clock recovery unit 102, a 10G-SDI synchronization detection unit 103, a word separation unit 104, and an 8B10B encoding unit 105. A multiplexing unit 13 and an E / O conversion unit 14 are provided after the input A processing unit 11 and the input B processing unit 12.

  In the input A processing unit 11, first, the O / E conversion unit 101 converts an optical signal into an electrical signal. When the input signal is an electric signal, the O / E conversion unit 101 is not necessary.

  The clock reproduction unit 102 reproduces the clock of the input 10G-SDI signal, determines the digital data “1” and “0” based on the reproduced reference clock, and outputs the digital data to the subsequent stage.

  The 10G-SDI synchronization detection unit 103 detects a K28.5 synchronization code defined in the ST435-2-2012 standard from the input signal.

  The word separation unit 104 distributes the signal output to the subsequent 8B10B encoding unit 105 and the signal (signal X1) output directly to the multiplexing unit 13. The signal directly output to the multiplexing unit 13 is temporarily stored in the input processing unit 11 or the multiplexing unit 13 in order to synchronize with the signal output to the multiplexing unit 13 through the processing of the 8B10B encoding unit 105. A unit (not shown) may be provided, and the signal (signal X1) may be designed to be stored in the temporary storage unit for a predetermined time and then processed by the multiplexing unit 13. Providing such a temporary storage unit for signal synchronization can be designed as appropriate in other embodiments as well.

  FIG. 2 is a diagram illustrating the operation of the word separation unit 104 using a transmission frame for one line. Data constituting the 10G-SDI signal includes EAV (End of Active Video) indicating the end of effective pixel data, HANC, D0.0 code of stuffing, SAV (Start of Active Video) indicating the start of effective pixel data, and effective. It can be roughly divided into pixel data (Active Video Data). LN (Line Number) and CRC (Cyclic Redundancy Code) will be described below as included in EAV according to ST435-2-2012. The K28.5 synchronization code of the 10G-SDI signal is inserted in the first two words of the SAV.

  For the effective pixel data, 40 bits from the beginning (Odd Basic Stream defined in ST435-2-2012, sometimes referred to as “front 40 bits”) is a self-synchronized scrambled signal, followed by 40 bits (ST435- Even Basic Stream defined in 2-2012, which may be referred to as “back 40 bits”) is an 8B10B encoded signal, both of which are repeatedly accommodated in an 80-bit cycle. The word separation unit 104 transmits the first 40 bits of the effective pixel data to the 8B10B encoding unit 105, the subsequent 40 bits to the multiplexing unit 13 (or the temporary storage unit described above), and the subsequent 40 bits to the 8B10B encoding unit 105. Then, the route is switched in a 40-bit cycle. This route switching is temporarily terminated after being performed for 40 bits before EAV, and is resumed for effective pixel data after the next SAV.

  The EAV, HANC, D0.0 code, and SAV, which are sufficiently smaller than the effective pixel data, may be output to the multiplexing unit 13 or output to the 8B10B encoding unit 105. . At this time, since D0.0 is a fixed value, the word separation unit 104 may delete it. In the following, a case where the signal is output toward the multiplexing unit 13 will be described.

  In the 8B10B encoding unit 105, the data distributed by the word separation unit 104 (the front 40 bits that have been self-synchronized and scrambled) become an input signal. This input signal is subjected to 8B10B encoding every 8 bits from the head, and a signal W1 in units of 50 bits is output to the multiplexing unit 13. The data that does not pass through the 8B10B encoding unit 105 output from the word separation unit 104 is output from the input A processing unit 11 as the signal X1.

  The above is the configuration of the input A processing unit 11.

  The input B processing unit 12 has the same configuration as the input A processing unit 11. The same processing is performed on the 10G-SDI signal B of the input signal, and the signal subjected to 8B10B encoding in the input B processing unit 12 is set to Y1, and the other data is output to the multiplexing unit 13 as Z1.

  The multiplexing unit 13 word-multiplexes the four systems of the signal W1, the signal X1, the signal Y1, and the signal Z1 output from the input A processing unit 11 and the input B processing unit 12, and outputs a signal C1.

  The operation of the multiplexing unit 13 will be described with reference to FIG. In order to perform multiplex processing, it is necessary to synchronize the timing of transmission frames by adjusting the phase between the four signals. First, using the SAV as a timing reference, the signal X1 having the SAV and the signal Z1 are synchronized. The reference for phase adjustment may be EAV, HANC, D0.0 code, and the beginning / end of effective pixel data. Next, the signal W1 and the signal Y1 are synchronized with the signal X1 and the signal Z1, respectively. As for the effective pixel data of the signal X1 and the signal Z1, since the data is distributed to the 8B10B encoding unit 105 by the word separation unit 104, periods of no data periodically exist. As shown in FIG. 3, synchronization is performed by combining the signal W1 and the signal Y1 at the timing of the no-data period.

  Subsequently, the four synchronized signals W1, X1, Y1, and Z1 are multiplexed into one signal. At this time, since the timing of data overlaps between signals, bit multiplexing for performing time division multiplexing for each bit or word multiplexing for performing time division multiplexing for every 10 bits as shown in FIG. 3 is used.

  For example, in the word multiplexing, the X1 and Z1 EAVs overlap as shown in FIG. 3, and the X1 signal [1] and signal [2], and the Z1 signal [3] and signal [4] are 20 bits continuous. In some cases, when the signal C1 is generated, time division multiplexing is performed so as to follow the signal [1], the signal [3], the signal [2], and the signal [4]. When bit multiplexing or word multiplexing is used, there are advantages in that the delay time of signal processing is small and the memory used can be reduced as compared with the method of multiplexing in units of transmission frames.

  According to such multiplexing, a frame for transmitting only the HANC data (that is, 1ch HANC data) included in the 10G-SDI input signal is generated without providing a redundant HANC data accommodating area. Therefore, the entire data amount is reduced as compared with the conventional techniques of Non-Patent Documents 2 and 3.

  In the above description, the EAV, HANC, D0.0 code and SAV are output to the multiplexing unit 13 on the assumption that the word separation unit 104 outputs the data, but these data are output to the 8B10B encoding unit 105. In this case, the same can be realized. In this case, the EAV, HANC, D0.0 code, and SAV included in the signal X1 and the signal Z1 in FIG. 3 are included in the signal W1 and the signal Y1, respectively. You can go to

  The E / O converter 14 converts the signal C1 from an electrical signal to an optical signal and outputs it as a transmission signal. However, when it is not necessary to convert the optical signal, the E / O conversion unit 14 may be omitted.

  If the transmission apparatus is configured as in the first embodiment, two 10G-SDI mode D format signals can be efficiently multiplexed into one high-speed signal. In addition, in a 10G-SDI mode D signal, 8B10B encoding can be performed even on a data portion that has not been subjected to 8B10B encoding. Can be suppressed.

  Note that the receiving device may be configured to perform processing reverse to the functional configuration of the transmission device.

  Although the first embodiment has been described as a representative example, there are many possible variations of the transmission apparatus that creates transmission data that solves the problems of the present invention. The transmission apparatus according to another embodiment of the present invention will be described below.

(Embodiment 2)
The second embodiment of the present invention will be described below. FIG. 4 is a diagram illustrating a functional configuration of the transmission apparatus according to the second embodiment of the present invention.

  The 10G-SDI signals A and B are input signals to the transmission apparatus, and are input to the input A processing unit 21 and the input B processing unit 22, respectively. Here, the 10G-SDI signals A and B are the same as the input signals of the first embodiment. Further, since the internal configurations of the input A processing unit 21 and the input B processing unit 22 are the same, the configuration of the input A processing unit 21 will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and the description is simplified.

  The input A processing unit 21 includes an O / E conversion unit 101, a clock recovery unit 102, a 10G-SDI synchronization detection unit 103, a word separation unit 104, an 8B10B decoding unit 201, a word multiplexing unit 202, and an 8B10B encoding unit 203. ing. In addition, a multiplexing unit 23 and an E / O conversion unit 14 are provided following the input A processing unit 21 and the input B processing unit 22.

  The second embodiment is different from the first embodiment in that an 8B10B decoding unit 201 and a word multiplexing unit 202 exist in the input A processing unit. Then, 8B10B encoding is performed on the output of the word multiplexing unit 202. A running disparity function is defined in the 8B10B encoding method. The running disparity function selects not only 8 bits but also 10 bits to be converted from two types depending on what code the 10 bits encoded immediately before 8B10B are, and avoids the deviation of the quantity of 1 and 0 It is a function. Although the method of the second embodiment has a demerit that the signal processing circuit scale is larger than that of the first embodiment, the running disparity function can be realized.

  The processing from the O / E conversion unit 101 to the word separation unit 104 is the same as that in the first embodiment.

  In the second embodiment, in the input A processing unit 21, the 8B10B decoding unit 201 decodes the 8B10B encoded data with respect to the signal X1 output from the word separation unit 104 (that is, the backward 40 bits that are the 8B10B encoded signal). I do. Thereafter, in the word multiplexing unit 202, the data directly output from the word separation unit 104 and the data that has passed through the 8B10B decoding unit 201 are time-division multiplexed in the same manner as the signal X1 and the signal W1 in FIG. Next, 8B10B encoding unit 203 performs 8B10B encoding. The signal output directly from the word separation unit 104 to the word multiplexing unit 202 corresponds to the output of the signal X1 to the word multiplexing unit 202 through the decoding process of the 8B10B decoding unit 201 and the word separation unit 104. A temporary storage unit (not shown) may be provided between the word multiplexing unit 202 and the signal may be stored in the temporary storage unit for a predetermined time so as to achieve signal synchronization.

  Thereafter, in the multiplexing unit 23, the two signals input from the input A processing unit 21 and the input B processing unit 22 are synchronized by performing phase adjustment in the same manner as in the multiplexing unit 13 of the first embodiment. Perform word multiplexing for each bit. Further, if necessary, the E / O converter 14 converts the optical signal into an optical signal and outputs a transmission signal.

  The second embodiment has an advantage that a running disparity function can be realized for the output of each input processing unit.

(Embodiment 3)
The third embodiment of the present invention will be described below. FIG. 5 is a diagram illustrating a functional configuration of the transmission apparatus according to the third embodiment of the present invention.

  The 10G-SDI signals A and B are input signals to the transmission apparatus, and are input to the input A processing unit 31 and the input B processing unit 32, respectively. Here, the 10G-SDI signals A and B are the same as the input signals of the first embodiment. Further, since the internal configurations of the input A processing unit 31 and the input B processing unit 32 are the same, the configuration of the input A processing unit 31 will be described. The same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals to simplify the description.

  The input A processing unit 31 includes an O / E conversion unit 101, a clock recovery unit 102, a 10G-SDI synchronization detection unit 103, a word separation unit 104, and an 8B10B decoding unit 201. Further, a multiplexing unit 13, an 8B10B encoding unit 33, and an E / O conversion unit 14 are provided in the subsequent stage of the input A processing unit 31 and the input B processing unit 32.

  As in the second embodiment, the third embodiment is different from the first embodiment in that an 8B10B decoding unit 201 exists in the input A processing unit 31. Further, the third embodiment is characterized in that an 8B10B encoding unit is provided after the multiplexing unit 13.

  The processing from the O / E conversion unit 101 to the word separation unit 104 is the same as that in the first embodiment.

  In the third embodiment, in the input A processing unit 31, the 8B10B decoding unit 201 decodes the 8B10B encoded data with respect to the signal X1 output from the word separation unit 104 (that is, the backward 40 bits that are the 8B10B encoded signal). I do. Similar to the second embodiment, a temporary storage unit may be provided in the path of a signal directly output from the word separation unit 104 to the multiplexing unit 13 as necessary. Thereafter, in the multiplexing unit 13, the data directly output from the word separation unit 104 of the input A processing unit 31, the data passed through the 8B10B decoding unit 201, the data output directly from the word separation unit 104 of the input B processing unit 32, and The data that has passed through the 8B10B decoding unit 201 is synchronized by phase adjustment in the same manner as in FIG. 3, and bit multiplexing or word multiplexing is performed every 10 bits. Next, 8B10B encoding unit 33 performs 8B10B encoding, and if necessary, converts it into an optical signal by E / O conversion unit 14 to output a transmission signal.

  The third embodiment has an advantage that a running disparity function can be realized for a transmission signal output from the apparatus.

(Embodiment 4)
The fourth embodiment of the present invention will be described below. FIG. 6 is a diagram illustrating a functional configuration of the transmission apparatus according to the fourth embodiment of the present invention.

  The 10G-SDI signals A and B are input signals to the transmission apparatus, and are input to the input A processing unit 41 and the input B processing unit 52, respectively. Here, the 10G-SDI signals A and B are the same as the input signals of the first embodiment. Since the internal configurations of the input A processing unit 41 and the input B processing unit 42 are the same, the configuration of the input A processing unit 41 will be described. The same components as in the first to third embodiments are denoted by the same reference numerals, and the description is simplified.

  The input A processing unit 41 includes an O / E conversion unit 101, a clock recovery unit 102, and a 10G-SDI synchronization detection unit 103. In addition, a multiplexing unit 23, an 8B10B encoding unit 33, and an E / O conversion unit 14 are provided following the input A processing unit 41 and the input B processing unit 42.

  Processing from the O / E conversion unit 101 to the 10G-SDI synchronization detection unit 103 is the same as that in the first embodiment.

  In the fourth embodiment, the word separation unit 104 and the 8B10B decoding unit 201 are omitted as compared with the third embodiment. In the fourth embodiment, the 10G-SDI synchronization detection unit 103 detects the synchronization of the input 10G-SDI signals A and B, and then inputs them to the multiplexing unit 23 as they are. The multiplexing unit 23 performs bit multiplexing or word multiplexing on the output signal of the input A processing unit 41 and the output signal of the input B processing unit 42 as in the second embodiment. Thereafter, the 8B10B encoding unit 33 performs 8B10B encoding as in the third embodiment.

  This method is disadvantageous in that 8B10B encoding is performed again on data that is already 8B10B encoded in 10G-SDI, so that the amount of data increases and the transmission rate increases. There is an advantage that hardware that is extremely simple and has a small circuit scale can be realized.

(Embodiment 5)
The fifth embodiment of the present invention will be described below. FIG. 7 is a diagram illustrating a functional configuration of the transmission apparatus according to the fifth embodiment of the present invention.

  Example 5 shows an implementation method when the input signals are 8 pairs of dual link HD-SDI signals (that is, 2 pairs of dual link HD-SDI signals 4 pairs). Dual-link HD-SDI signal 4 pairs (A1, B1, to A4, B4) corresponding to the 10G-SDI signal A are input to the input A processing unit 51, and the 10G-SDI signal B is input to the input B processing unit 52. Corresponding dual-link HD-SDI signal 4 pairs (A5, B5 to A8, B8) are input.

  Since the internal configurations of the input A processing unit 51 and the input B processing unit 52 are the same, the configuration of the input A processing unit 51 will be described below. The input A processing unit 51 includes a synchronization detection unit group 501, a parity bit removal unit group 502, and a HANC removal unit 503. Further, a multiplexing unit 53, an 8B10B encoding unit 33, and an E / O conversion unit 14 are provided following the input A processing unit 51 and the input B processing unit 52.

  First, in the synchronization detection unit group 501, each synchronization detection unit performs synchronization detection using the SAV of each HD-SDI.

  Thereafter, in the parity bit removing unit group 502, each parity bit removing unit removes the parity bits in the effective pixel data of the signals B1 to B4.

  Next, the HANC removal unit 503 removes HANC data for 7 ch of B1 to B4 and A2 to A4. The HANC data of the signal A1 is output as it is.

  The detailed procedure of the parity bit removing unit group 502 and the HANC removing unit 503 may be performed in conformity with the mode D of the ST435-2-2012 standard. As a result, the input A processing unit 51 outputs data equivalent to the information included in one 10G-SDI signal A as eight output signals.

  Similarly, the input B processing unit 52 also deletes HANC data other than the signal A5 and outputs data equivalent to the information included in one 10G-SDI signal B as eight output signals.

  As a result, the multiplexing unit 53 receives 16 systems of signals. These signals are the same as the 4 systems of signals input to the multiplexing unit 13 of the third embodiment in FIG. Multiple processing can be performed in the same manner as in FIG.

  The subsequent 8B10B encoder 33 performs 8B10B encoding on the output of the multiplexer 53, and the E / O converter 14 converts the output signal of the 8B10B encoder 33 from an electrical signal to an optical signal and transmits the signal. Output as a signal. In addition, when transmitting as an electrical signal, it is not necessary to provide the E / O conversion part 14.

  As a result, the transmission signal is a frame that transmits only the HANC data of each first channel (A1 and A5) included in the input signal of the 8 pairs of dual link HD-SDI signals without providing a redundant HANC data accommodating area. Can be efficiently multiplexed onto a high-speed transmission signal. Further, since 8B10B encoding is performed on all data, it is possible to prevent the occurrence of data errors by preventing continuation of the same code.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each means, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of means, steps, etc. can be combined or divided into one. .

  The transmission apparatus according to the present invention is a technique used in a wide range of broadcasting business equipment such as in a broadcasting station or relay program production. In particular, it is useful for future miniaturization and cost reduction of 4K and 8K ultra-high-definition video data transmission apparatus with large capacity data.

11, 21, 31, 41, 51 Input A processing unit 12, 22, 32, 42, 52 Input B processing unit 13, 23, 53 Multiplexing unit 14 E / O conversion unit 33 8B10B encoding unit 101 O / E conversion unit 102 clock recovery unit 103 10G-SDI synchronization detection unit 104 word separation unit 105 8B10B encoding unit 201 8B10B decoding unit 202 word multiplexing unit 203 8B10B encoding unit 501 synchronization detection unit group 502 parity bit removal unit group 503 HANC removal unit

Claims (6)

In a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals as input and multiplexes them into one signal for transmission.
A word separation unit that separates and distributes Odd Basic Stream, which is a self-synchronized scrambled signal, and Even Basic Stream, which is an 8B10B encoded signal, with respect to effective pixel data of the 10G-SDI signal; and the word separation unit A plurality of input processing units comprising: an 8B10B encoding unit that performs 8B10B encoding on the Odd Basic Stream distributed in
An output signal including the Even Basic Stream from the word separation unit and an output signal from the 8B10B encoding unit from the plurality of input processing units, and a multiplexing unit that performs time-division multiplexing in synchronization with these signals;
A transmission apparatus comprising: In a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals as input and multiplexes them into one signal for transmission.
A word separation unit that separates and distributes Odd Basic Stream, which is a self-synchronized scrambled signal, and Even Basic Stream, which is an 8B10B encoded signal, with respect to effective pixel data of the 10G-SDI signal; and the word separation unit 8B10B decoding unit for performing 8B10B decoding on the Even Basic Stream distributed in step 1, and a word multiplexing unit for time-division multiplexing the output signal including the Odd Basic Stream from the word separation unit and the output signal of the 8B10B decoding unit A plurality of input processing units, and an 8B10B encoding unit that performs 8B10B encoding on the output signal of the word multiplexing unit;
A multiplexing unit that receives output signals from the plurality of input processing units and synchronizes them to perform time division multiplexing;
A transmission apparatus comprising: In a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals as input and multiplexes them into one signal for transmission.
A word separation unit that separates and distributes Odd Basic Stream, which is a self-synchronized scrambled signal, and Even Basic Stream, which is an 8B10B encoded signal, with respect to effective pixel data of the 10G-SDI signal; and the word separation unit A plurality of input processing units, each including an 8B10B decoding unit that performs 8B10B decoding on the Even Basic Stream distributed in
An output signal including the Odd Basic Stream from the word separation unit and an output signal from the 8B10B decoding unit from the plurality of input processing units, and a multiplexing unit that synchronizes them and time-division multiplexes;
An 8B10B encoding unit that performs 8B10B encoding on the output signal of the multiplexing unit;
A transmission apparatus comprising: In a transmission apparatus that receives a plurality of 10G-SDI (10 Gbps Serial Digital Interface) signals as input and multiplexes them into one signal for transmission.
A plurality of input processing units that directly output an Odd Basic Stream that is a self-synchronized scrambled signal and an Even Basic Stream that is an 8B10B-encoded signal for the effective pixel data of the 10G-SDI signal;
A multiplexing unit that receives output signals from the plurality of input processing units and synchronizes them to perform time division multiplexing;
An 8B10B encoding unit that performs 8B10B encoding on the output signal of the multiplexing unit;
A transmission apparatus comprising: A transmission apparatus that receives a plurality of sets of four pairs of dual-link HD-SDI (High Definition-Serial Digital Interface) signals corresponding to 10 G-SDI (10 Gbps serial digital interface) signals, and multiplexes them into one signal for transmission. In
A parity bit removing unit for removing parity bits from the B channel of the four pairs of dual link HD-SDI signals, and a HANC removing unit for removing HANC data from 2 channels to 8 channels of the dual link HD-SDI signal; A plurality of input processing units comprising:
A multiplexing unit that receives output signals from the plurality of input processing units and synchronizes them to perform time division multiplexing;
An 8B10B encoding unit that performs 8B10B encoding on the output signal of the multiplexing unit;
A transmission apparatus comprising: In a transmission method in which a plurality of 10G-SDI (10 Gbps serial digital interface) signals or a plurality of sets of four pairs of dual link HD-SDI (high definition-serial digital interface) signals are multiplexed into one signal and transmitted.
The multiplexed signal is a frame for transmitting only the HANC data of the first channel included in each 10G-SDI signal or each of the four pairs of dual link HD-SDI signals with respect to the HANC data, and before or after the multiplexing process. 8B10B encoding processing is performed on at least a part of the 10G-SDI signal or the effective pixel data of the dual link HD-SDI, and all of the multiplexed effective pixel data is an 8B10B encoded signal. A transmission method characterized by that.

Images