CN102523436B - Transmission terminal, receiving terminal, multi-channel video optical fiber transmission system and multi-channel video optical fiber transmission method - Google Patents
Transmission terminal, receiving terminal, multi-channel video optical fiber transmission system and multi-channel video optical fiber transmission method Download PDFInfo
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Abstract
The invention provides a transmission terminal, a receiving terminal, a multi-channel video optical fiber transmission system and a multi-channel video optical fiber transmission method. The method comprises the following steps that: the receiving terminal encodes a control flow to obtain M-bit parallel control data, performs N-times data copy on the M-bit parallel control data, and performs parallel/serial conversion to obtain N*M-bit serial control data; the receiving terminal converts the electrical signal of the N*M-bit serial control data into an optical signal, and transmits the optical signal to the transmission terminal; the transmission terminal converts the optical signal of the N*M-bit serial control data into the electrical signal, and performs serial/parallel conversion to obtain N*M-bit parallel control data; and the transmission terminal performs shift on the N*M-bit parallel control data and positions data boundary, recovers the N*M-bit parallel control data according to the data boundary, cleanses the recovered control data to obtain M-bit control data and decodes the M-bit control data, and obtains and outputs the control flow. By the method and devices, the hardware cost can be reduced and the transmission rate of the control data can be dynamically switched.
Description
Technical field
The present invention relates to field of video transmission, particularly transmitting terminal and the receiving terminal in a kind of multi-channel video fiber optic transmission system, multi-channel video optical fiber transmission method, multi-channel video fiber optic transmission system.
Background technology
Fig. 1 is the structural representation of existing multi-channel video fiber optic transmission system.Now, in conjunction with Fig. 1, existing multi-channel video fiber optic transmission system is described, specific as follows:
Existing multi-channel video fiber optic transmission system comprises: the optical fiber 12 of transmitting terminal 10, receiving terminal 11 and connection transmitting terminal 10 and receiving terminal 11.Wherein, the one end that sends video flowing in existing multi-channel video fiber optic transmission system is called to transmitting terminal 10, receiver, video Liu one end in existing multi-channel video fiber optic transmission system is called to receiving terminal 11; Transmitting terminal 10 and receiving terminal 11 can be controlled stream and data flow by optical fiber 12 transmission simultaneously.
In existing multi-channel video fiber optic transmission system, with respect to the transmission rate of video data, the transmission rate of controlling data belongs to low rate, and the transmission rate of video data belongs to two-forty.
The control stream that 111 pairs of receiving terminals of coding module are received is encoded, and the parallel control data after output encoder; The Serial Control data of the parallel control data transaction Cheng Yi road low speed after the second 112 pairs of low-speed serial transceivers coding receiving output; The signal of telecommunication of the Serial Control data of the second optical module 113Jiang mono-road low speed is converted to light signal, by optical fiber 12, transfers to the first optical module 102; The first optical module 102 is converted to the signal of telecommunication output by the light signal that receives the Serial Control data of Yi road low speed by optical fiber; The first low-speed serial transceiver 103 is converted to the Serial Control data that receive Yi road low speed parallel control data the output of multi-path low speed; The parallel control decoding data of 104 pairs of multi-path low speeds that receive of decoder module, obtains and controls stream.
The first high speed serialization transceiver 101 receives multi-path video stream, converts the multidiameter delay video data receiving to road serial video data output at a high speed; The first optical module 102 is converted to light signal by the signal of telecommunication that receives Yi road serial video data at a high speed, by optical fiber 12, transfers to the second optical module 113; The second optical module 113 is converted to the signal of telecommunication output by the light signal that receives Yi road serial video data at a high speed by optical fiber 12; The second high speed serialization transceiver 114 is converted to the parallel video data of multi-path low speed and exports receiving Yi road serial video data at a high speed.
In existing multi-channel video fiber optic transmission system, due to video data and the different transmission rate of employing of controlling data, so, transmitting terminal and receiving terminal all need to install one in order to the high speed serialization transceiver of transmitting video data, transmitting terminal and receiving terminal all need to install one in order to the low-speed serial transceiver of transmitting control data, have increased the hardware cost of whole system; Owing to controlling the transmission rate of data, by low-speed serial transceiver, determined, so, in order to adopt different speed rates, control data, existing multi-channel video fiber optic transmission system only has changes dissimilar low-speed serial transceiver, further increased the hardware cost of whole system, and for each low-speed serial transceiver, cannot dynamically be switched to different speed ranges; Existing multi-channel video fiber optic transmission system selects existing symmetrical transmission light terminal as transmitting terminal and receiving terminal conventionally, because the optical module in existing symmetrical transmission light terminal adopts identical speed rates video data and controls data, may there is data packet loss, the sensitivity problem that affects transmission reliability such as low.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of multi-channel video fiber optic transmission system, this system can reduce hardware cost, and the transmission rate of paired domination number certificate is dynamically switched.
The object of the present invention is to provide a kind of transmitting terminal, this transmitting terminal can reduce hardware cost, and the transmission rate of paired domination number certificate is dynamically switched.
The object of the present invention is to provide a kind of receiving terminal, this receiving terminal can reduce hardware cost, and the transmission rate of paired domination number certificate is dynamically switched.
The object of the present invention is to provide a kind of multi-channel video optical fiber transmission method, the method can reduce hardware cost, and the transmission rate of paired domination number certificate is dynamically switched.
For achieving the above object, technical scheme of the present invention is specifically achieved in that
A fiber optic transmission system, this system comprises transmitting terminal, receiving terminal and connects the optical fiber of transmitting terminal and receiving terminal, and described receiving terminal comprises:
Coding module, to the control stream receiving encode and output encoder after M bit parallel control data; Described M is natural number;
N haplotype data replication module, carries out N haplotype data to the M bit parallel control data after the coding receiving and copies, and output N*M bit parallel is controlled data; Described N is greater than 2 natural number;
The second high speed serialization transceiver, controls data transaction by the N*M bit parallel receiving and becomes N*M bit serial to control data, and output N*M bit serial is controlled data;
The second optical module, the signal of telecommunication of N*M bit serial being controlled to data is converted to light signal, is transmitted through the fiber to described transmitting terminal;
Described transmitting terminal comprises:
The first optical module, the light signal of the N*M bit serial receiving by optical fiber being controlled to data is converted to the signal of telecommunication, and exports the first high speed serialization transceiver to;
The first high speed serialization transceiver, controls data by N*M bit serial and is converted to N*M bit parallel control data, and output N*M bit parallel is controlled data;
N haplotype data recovers module, the N*M bit parallel receiving is controlled to data to be shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel is controlled to data and recover, the control data acquisition M bit arranging after recovering is controlled data output;
Decoder module, controls decoding data to the M bit receiving, and obtains to control flow and export.
In said system, described N haplotype data recovers module and comprises:
Data recovery unit, according to the multiple N of data Replica, the N*M bit parallel receiving is controlled to data to be shifted, revert to N haplotype data and copy the alignment thereof that front M bit parallel is controlled data, location N*M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, determines N Bit data corresponding to each bit control data;
Described data recovery unit is 0 value number and the 1 value number of the binary numeral of N Bit data relatively, when 0 value number is greater than 1 value number, the binary numeral of this bit being controlled to data is decided to be 0 value, when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value, obtains control data output after recovering;
Byte-aligned unit, determines byte boundary according to the pattern of coding protocol definition, according to byte boundary, the control data after the recovery receiving is arranged, and obtains M bit to be decoded and controls data and export decoder module to.
, this receiving terminal connects a transmitting terminal by optical fiber, and this receiving terminal comprises:
Coding module, to the control stream receiving encode and output encoder after M bit parallel control data; Described M is natural number;
N haplotype data replication module, carries out N haplotype data to the M bit parallel control data after the coding receiving and copies, and output N*M bit parallel is controlled data; Described N is greater than 2 natural number;
The second high speed serialization transceiver, controls data transaction by the N*M bit parallel receiving and becomes N*M bit serial to control data, and output N*M bit serial is controlled data;
The second optical module, the signal of telecommunication of N*M bit serial being controlled to data is converted to light signal, is transmitted through the fiber to transmitting terminal.
In above-mentioned receiving terminal, described coding module is 8B/10B coding module;
Described M is 10, and described N is 10;
Described the second high speed serialization transceiver is operated on 2.5Gbps;
The message transmission rate that described N*M bit serial is controlled data is 250Mbps.
, this transmitting terminal connects a receiving terminal by optical fiber, and this transmitting terminal comprises:
The first optical module, the light signal of the N*M bit serial from receiving terminal receiving by optical fiber being controlled to data is converted to the signal of telecommunication, and exports the first high speed serialization transceiver to; Described M is natural number, and described N is greater than 2 natural number;
The first high speed serialization transceiver, controls data by N*M bit serial and is converted to N*M bit parallel control data, and output N*M bit parallel is controlled data;
N haplotype data recovers module, the N*M bit parallel receiving is controlled to data to be shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel is controlled to data and recover, the control data acquisition M bit arranging after recovering is controlled data output;
Decoder module, controls decoding data to the M bit receiving, and obtains to control flow and export.
In above-mentioned transmitting terminal, described N haplotype data recovers module and comprises:
Data recovery unit, according to the multiple N of data Replica, the N*M bit parallel receiving is controlled to data to be shifted, revert to N haplotype data and copy the alignment thereof that front M bit parallel is controlled data, location N*M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, determines N Bit data corresponding to each bit control data;
Described data recovery unit is 0 value number and the 1 value number of the binary numeral of N Bit data relatively, when 0 value number is greater than 1 value number, the binary numeral of this bit being controlled to data is decided to be 0 value, when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value, obtains control data output after recovering;
Byte-aligned unit, determines byte boundary according to the pattern of coding protocol definition, according to byte boundary, the control data after the recovery receiving is arranged, and obtains M bit to be decoded and controls data and export decoder module to.
In above-mentioned transmitting terminal, the message transmission rate that described N*M bit serial is controlled data is 250Mbps;
Described the first high speed serialization transceiver is operated on 2.5Gbps;
Described M is 10, and described N is 10;
Described decoder module is 8B/10B decoder module.
An optical fiber transmission method, the method comprises:
Receiving terminal is encoded and is obtained the M bit parallel control data after coding the control stream receiving, and the M bit parallel control data after coding is carried out to N haplotype data and copy, and obtains N*M bit parallel and controls data;
Receiving terminal is controlled data transaction by N*M bit parallel and is become N*M bit serial to control data, and the signal of telecommunication of N*M bit serial being controlled to data is converted to light signal, is transmitted through the fiber to transmitting terminal;
The light signal that transmitting terminal is controlled data by N*M bit serial is converted to the signal of telecommunication, N*M bit serial is controlled to data and be converted to N*M bit parallel control data;
Transmitting terminal is controlled data by N*M bit parallel and is shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel being controlled to data recovers, the control data acquisition M bit arranging after recovering is controlled data, and decoding M bit control data acquisition is controlled and flowed and export;
Described M is natural number, and described N is greater than 2 natural number.
In said method, described location M bit parallel is controlled the data boundary of data, according to data boundary, N*M bit parallel is controlled to data and recovers to comprise:
A1, according to the multiple N of data Replica, the N*M bit parallel that receives is controlled to data and is shifted, the M bit parallel before reverting to N haplotype data and copying is controlled the alignment thereof of data;
A2, according to the multiple N of data Replica, location N*M bit parallel is controlled the data boundary that each bit in data is controlled data, obtains each bit and controls N Bit data corresponding to data;
0 value number of the binary numeral of A3, comparison N Bit data and the size of 1 value number, when 0 value number is greater than 1 value number, the binary numeral of this bit being controlled to data is decided to be 0 value, and when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value;
A4, according to steps A 3, obtain M the control data after recovery.
In said method, the control data acquisition M bit control data that arrange after recovering comprise:
B1, the pattern defining according to coding protocol, determine byte boundary;
B2, according to byte boundary, the control data after recovering are arranged, obtain M bit to be decoded and control data.
As seen from the above technical solutions, the invention provides a kind of transmitting terminal, receiving terminal, multi-channel video fiber optic transmission system and transmission method, receiving terminal is when sending control data, M bit parallel control data after coding are carried out to N doubly to be copied, utilize parallel control data after high speed serialization transceiver transmission N doubly copies to optical fiber, be transmitted through the fiber to transmitting terminal; Transmitting terminal is utilized high speed serialization transceiver, parallel control data after the N receiving by optical fiber is doubly copied are gone here and there and change, N haplotype data recover module to go here and there and change after parallel control data be shifted and locator data border, each bit corresponding to parallel control data after acquisition N doubly copies controlled the data boundary of data, according to the binary numeral of controlling data, recover to obtain M bit and control data, and decode to obtain and control stream.Adopt terminal of the present invention, system and method, can save the existing low-speed serial transceiver in order to transmitting control data, only utilize high speed serialization transceiver just can realize the video data of different transmission rates and the transmission of control data, reduced hardware cost, and transmission rate that can paired domination number certificate is dynamically switched.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing multi-channel video fiber optic transmission system.
Fig. 2 is the structural representation of multi-channel video fiber optic transmission system of the present invention.
Fig. 3 is the sequential schematic diagram that transmitting terminal of the present invention is carried out data recovery.
Fig. 4 is the flow chart of multi-channel video optical fiber transmission method of the present invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
In multi-channel video fiber optic transmission system of the present invention and transmission method, transmitting terminal and receiving terminal have utilized in Optical Fiber Transmission process forward video channel bandwidth higher than the feature of the asymmetric speed rates of reverse control channel bandwidth, utilize a high speed serialization transceiver to carry out the control data of different transmission rates and the transmission of video data, particularly, M bit control data waiting for transmission are carried out to N doubly to be copied, make the second high speed serialization transceiver when transmitting control data, still be operated in two-forty, on higher switching bandwidth, and in fact by the data of Optical Fiber Transmission, still for N doubly copies front M bit, control data, the transmission rate of the control data by Optical Fiber Transmission is lower than the transmission rate of video data, met the feature of asymmetric transmission, transmitting terminal is utilizing the first high speed serialization transceiver successfully to receive after control data, utilizing N haplotype data to recover module is shifted to parallel control data, locator data border and binary numeral comparison, determine the numerical value of each bit control data, to recover the parallel control data after receiving terminal coding, after decoding, obtain and control stream.
For sake of clarity, transmit leg and recipient in multi-channel video fiber optic transmission system of the present invention are described, by sending video data to optical fiber or receiving by optical fiber the device of controlling data, be defined as transmitting terminal, by by optical fiber receiving video data or send control data to the device of optical fiber and be defined as receiving terminal.Transmitting terminal of the present invention and the one end that is not connected optical fiber in receiving terminal can connect the equipment, the equipment that produces asynchronous data signal that produce audio signal, produce the equipment of ethernet signal, produce the equipment of switching value signal and produce one or more in the equipment of vision signal; The present invention is referred to as video data by vision signal, and audio signal, asynchronous data signal, ethernet signal and/or switching value signal are referred to as to control data.In the present invention, the bandwidth of transmitting video data is than the broader bandwidth of transmitting control data, be that the bandwidth of video channel is than the broader bandwidth of control channel, therefore, the transmission rate of video data is called to two-forty, the transmission rate of controlling data is called to low rate.
Fig. 2 is the structural representation of multi-channel video fiber optic transmission system of the present invention.Now, in conjunction with Fig. 2, multi-channel video fiber optic transmission system of the present invention is described, specific as follows:
Multi-channel video fiber optic transmission system of the present invention comprises: the optical fiber 12 of transmitting terminal 20, receiving terminal 21 and connection transmitting terminal 20 and receiving terminal 21.The passage that optical fiber 12 of the present invention is transmitting video data provides wider bandwidth, for the passage of transmitting control data provides narrower bandwidth.
Wherein, receiving terminal 21 comprises: coding module 211, N haplotype data replication module 212, the second high speed serialization transceiver 214 and the second optical module 213.
The control stream that 211 pairs of coding modules receive encode and output encoder after M bit parallel control data.Wherein, coding module 211 is encoded according to default coding protocol; M is natural number.
M bit parallel control data after 212 pairs of codings that receive of N haplotype data replication module are carried out N haplotype data and are copied, and output N*M bit parallel is controlled data.Wherein, each Bit data of N haplotype data replication module 212 paired domination number certificates has carried out N and has doubly copied; N is greater than 2 natural number.
The second high speed serialization transceiver 214 is controlled data transaction by the N*M bit parallel receiving and is become N*M bit serial to control data, and output N*M bit serial is controlled data.Wherein, N*M bit parallel is controlled data when being carried out parallel-serial conversion by the second high speed serialization transceiver 21, can make the second high speed serialization transceiver 21 be operated in higher rate, i.e. the wider operating state of switching bandwidth; Owing to M bit parallel being controlled to data, carried out N times copying, the transmission rate of the data that in fact the second high speed serialization transceiver 21 is exported is still controlled the transmission rate of data for M bit parallel, to meet the narrower feature of bandwidth of the control channel of optical fiber 12.
The second high speed serialization transceiver 214 of the present invention can adopt the existing high speed serialization transceiver (SERDES) that comprises serializer (serializer) and deserializer (deserializer), but, different from existing high speed serialization transceiver is, the second high speed serialization transceiver 214 of the present invention is according to existing method processing video data, the parallel control data that doubly copy through N that the present invention is mentioned are processed, extra in order to process the low-speed serial transceiver of parallel control data without increasing again, reduced hardware cost.
The signal of telecommunication that the second optical module 213 is controlled data by N*M bit serial is converted to light signal, by optical fiber 12, transfers to transmitting terminal 20.The second optical module 213 also can be converted to the signal of telecommunication by the light signal of the serial video data obtaining by optical fiber 12, and exports the second high speed serialization transceiver 214 to.Wherein, the N*M bit serial that the second optical module 213 is processed is controlled the transmission rate of data lower than the transmission rate of the serial video data receiving by optical fiber 12.
The second optical module 213 of the present invention can adopt the identical symmetrical optical module of speed of existing transmitting control data and video data, but in order to reduce hardware cost, and avoid the generation due to the poor problem of the transmission reliabilities such as the data packet loss that adopts symmetrical optical module to cause, sensitivity, the second optical module 213 of the present invention can adopt existing asymmetrical beam module, and the speed that this asymmetrical beam module is uploaded defeated control data and video data is different.
Wherein, transmitting terminal comprises: the first optical module 202, the first high speed serialization transceiver 201, N haplotype data recover module 203 and decoder module 204.
The light signal that the first optical module 202 is controlled data by the N*M bit serial receiving by optical fiber 12 is converted to the signal of telecommunication, and exports the first high speed serialization transceiver 201 to.The first optical module 202 is also further converted to light signal by the signal of telecommunication of the serial video data of the first high speed serialization transceiver 201 outputs, and transfers to receiving terminal 21 by optical fiber 12.Wherein, the N*M bit serial that the first optical module 202 is processed is controlled the transmission rate of data lower than the transmission rate of the serial video data sending by optical fiber 12.
The first optical module 202 of the present invention can adopt the identical symmetrical optical module of speed of existing transmitting control data and video data, but in order to reduce hardware cost, and avoid the generation due to the poor problem of the transmission reliabilities such as the data packet loss that adopts symmetrical optical module to cause, sensitivity, the first optical module 202 of the present invention can adopt existing asymmetrical beam module, and the speed that this asymmetrical beam module is uploaded defeated control data and video data is different.
The first high speed serialization transceiver 201 is controlled data by the N*M bit serial receiving and is converted to N*M bit parallel control data, and output N*M bit parallel is controlled data.The first high speed serialization transceiver 201 is converted to serial video data by the parallel video data that receive, and exports the first optical module 202 to.Wherein, the actual data transfer rate that N*M bit serial is controlled data is the transmission rate that M bit parallel is controlled data, and transmission N*M bit serial is controlled data and has been equivalent to the control data transmission of M bit parallel N time; Based on foregoing, the method of the transmission N*M bit serial control data that the present invention adopts had both met the lower feature of bandwidth of control channel, meet again the feature that the first high speed serialization transceiver 201 is operated in higher transmission rate, be operated in the wider operating state of switching bandwidth.
The first high speed serialization transceiver 201 of the present invention can adopt existing high speed serialization transceiver, different from existing high speed serialization transceiver is, the first high speed serialization transceiver 201 of the present invention is when carrying out the processing of video data, can control data to the N*M bit serial receiving processes, save the low-speed serial transceiver that the extra control data in order to low speed are processed, reduced hardware cost.
N haplotype data recovers module 203 the N*M bit parallel control data that receive is shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel is controlled to data and recover, the control data acquisition M bit arranging after recovering is controlled data output.Wherein, what N haplotype data recovery module 203 received is that N*M bit parallel is controlled data, and the bit that every N Bit data is controlled in data corresponding to M bit parallel is controlled data; What N haplotype data recovered module 203 outputs is that M bit parallel is controlled data, and the M bit parallel after the coding of coding module 211 outputs that obtain after recovering is controlled data.
The M bit that 204 pairs of decoder modules receive is controlled decoding data, obtains to control flow and export.Wherein, decoder module 204 is decoded according to default coding protocol.
Wherein, the N haplotype data of transmitting terminal 20 recovery module 203 comprises data recovery unit 2031 and byte-aligned unit 2032.
Byte boundary is determined according to the pattern of coding protocol definition in byte-aligned unit 2032, according to byte boundary, the control data after the recovery receiving is arranged, and obtains M bit to be decoded and controls data and export decoder module 204 to.
Take that to send a typical COMMA code K28.5 be example, transmission rate in forward video channel bandwidth is 2.5 gigabits (Gbps) per second, when the transmission rate of reverse control channel bandwidth is 250 MBPSs (Mbps), coding module 211 can adopt 8B/10B coding module, code word after encoded is 0101111100, code word after 212 pairs of codings of N haplotype data replication module is carried out 10 times and is copied, the data to be sent that export on the transmission interface of the second high speed serialization transceiver 214 have become binary bit sequence: 0000000000_1111111111_0000000000_1111111111_1111111111_1 111111111_1111111111_1111111111_0000000000_0000000000, each bit value that is code word 0101111100 has all been replicated 10 times, parallel-serial conversion through the second high speed serialization transceiver 214, bandwidth actual in differential lines has become 250Mbps.Receiving terminal 21 of the present invention is actually code word 0101111100 is repeated to have sent N time, realized the reduction of code check on channel, has met the feature that the second high speed serialization transceiver 214 is operated in 2.5Gbps simultaneously.
Fig. 3 is the sequential schematic diagram that transmitting terminal of the present invention is carried out data recovery.Fig. 3 is only front 4 Bit datas of code word 0101111100, the sequential chart that 0101 data are recovered.
The actual transfer rate of the control data on the control channel of optical fiber 12 is 250Mbps, being equivalent to every Bit data has sampled 10 times, but, on the control channel of optical fiber 12, by 0 signal, jumped to the edge of 1 signal, or the edge that is jumped to 0 signal by 1 signal all likely produces sampling error, as shown in Figure 3.
It is upper that the first high speed serialization transceiver 201 is operated in 2.5Gbps, and the control data that receive are that each bit value of code word 0101111100 has all been replicated the data after 10 times.
If front 4 Bit datas of the code word that the receiving terminal of the first high speed serialization transceiver 201 receives may be binary bit sequence 0000000001_1111111111_1100000000_1111111110, for fear of above-mentioned sampling error, data are recovered to impact, data recovery unit 2031 locator data borders, obtain the border of 10 Bit datas, such as, 0000000001 or 1111111111 data boundary, in 10 Bit datas, 0 or 1 number is added up, when 0 value number is greater than 1 value number, revert to 0 value, when 1 value number is greater than 0 value number, revert to 1 value, and then 4 bit codewords that obtain output are 0101.
The border of byte can such as the pattern of K28.5, K30.7, be determined according to the sign bit in the pattern of coding protocol definition in byte-aligned unit 2032, to the control data preparation after recovering is become to 10 bit data to be decoded.
Due in the process of transmitting control data, adjacent dibit is controlled data and is carried out the adjacent two bits of data that N doubly copies the adjacent N Bit data of acquisition and may produce sampling error, it is the sampling error by 0 value saltus step to 1 value that hopping edge mistake sampled point produces, or by the sampling error of 1 value saltus step to 0 value, such as: last position of 0000000001 in binary bit sequence 0000000001_1111111111_1100000000_1111111110 has produced sampling error.The method that compares to determine of 0 value number and 1 value number in the binary numeral that data recovery unit 2031 of the present invention adopts, has avoided the impact of sampling error on the control data after recovering, and has guaranteed the accuracy of the control data after recovering.
Fig. 4 is the flow chart of multi-channel video optical fiber transmission method of the present invention.Now, in conjunction with Fig. 4, multi-channel video optical fiber transmission method of the present invention is described, specific as follows:
Step 401: receiving terminal is encoded to the control stream receiving, the M bit parallel obtaining after coding is controlled data;
This step specifically can be carried out by the coding module 211 of receiving terminal 21.
Step 402: receiving terminal carries out N haplotype data to the M bit parallel control data after encoding to be copied, and obtains N*M bit parallel and controls data;
In this step, receiving terminal 21 has carried out N by each bit control data in M bit parallel control data doubly to be copied.
This step specifically can be carried out by the N haplotype data replication module 212 of receiving terminal 21.
Step 403: receiving terminal is controlled data transaction by N*M bit parallel and become N*M bit serial to control data;
This step specifically can be by the second high speed serialization transceiver 214 of receiving terminal 21.
Step 404: the signal of telecommunication that receiving terminal is controlled data by N*M bit serial is converted to light signal, is transmitted through the fiber to transmitting terminal;
This step specifically can be by the second optical module 213 of receiving terminal 21.
Step 405: the light signal that transmitting terminal is controlled data by N*M bit serial is converted to the signal of telecommunication;
This step specifically can be by the first optical module 202 of transmitting terminal 20.
Step 406: transmitting terminal is controlled data by N*M bit serial and is converted to N*M bit parallel control data;
This step specifically can be by the first high speed serialization transceiver 201 of transmitting terminal 20.
Step 407: transmitting terminal is controlled data by N*M bit parallel and is shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel is controlled to data and recovers;
The data recovery unit 2031 that this step specifically can be recovered by the N haplotype data of transmitting terminal 20 in module 203 is carried out.
This step comprises: step 4071, and according to the multiple N of data Replica, the N*M bit parallel receiving is controlled to data and be shifted, revert to N haplotype data and copy the alignment thereof that front M bit parallel is controlled data; Step 4072, according to the multiple N of data Replica, location N*M bit parallel is controlled the data boundary of each bit control data in data, obtains each bit and controls N Bit data corresponding to data; Step 4073, relatively the size of 0 of the binary numeral of N Bit data value number and 1 value number, when 0 value number is greater than 1 value number, is decided to be 0 value by the binary numeral of these bit control data, when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value; Step 4074, obtains M the control data after recovery according to step 4063.
Step 408: transmitting terminal arranges the control data after recovering, obtains M bit and controls data;
The byte-aligned unit 2032 that this step specifically can be recovered by the N haplotype data of transmitting terminal 20 in module 203 is carried out.
This step comprises: step 4081, according to the pattern of coding protocol definition, determine byte boundary; Step 4082, according to byte boundary, arranges the control data after recovering, and obtains M bit to be decoded and controls data.
Step 409: transmitting terminal decoding M bit is controlled data acquisition control and flowed and export;
This step is specifically carried out by the decoder module 204 of transmitting terminal 20.
Step 410: finish
In above-mentioned preferred embodiment of the present invention, system of the present invention, it is high that device and method makes full use of forward video channel bandwidth, the feature that reverse control channel bandwidth is low, adopt asymmetric speed rates to control data and video data, in order to reduce hardware cost, the terminal of each side only adopts a high speed serialization transceiver go here and there and change, in receiving terminal side, the control data that send having been carried out to N doubly copies, in transmitting terminal side, the control data that receive having been carried out to N doubly recovers, assurance control data are transmitted by the low bandwidth control channel of light, owing to having carried out N, doubly copy, the high speed serialization transceiver of either side terminal all can paired domination number certificate be processed under higher operating rate, reduced hardware cost.In addition, the speed of control channel can dynamically be switched with N, according to the difference of N value, can dynamically be switched at any time different speed ranges, can support speed range widely, has also solved the uncontrollable problem of the fixed rate being determined by high speed serialization transceiver.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (10)
1. a multi-channel video fiber optic transmission system, this system comprises transmitting terminal, receiving terminal and connects the optical fiber of transmitting terminal and receiving terminal, it is characterized in that, and described receiving terminal comprises:
Coding module, to the control stream receiving encode and output encoder after M bit parallel control data; Described M is natural number;
N haplotype data replication module, carries out N haplotype data to the M bit parallel control data after the coding receiving and copies, and output N*M bit parallel is controlled data; Described N is greater than 2 natural number;
The second high speed serialization transceiver, controls data transaction by the N*M bit parallel receiving and becomes N*M bit serial to control data, and output N*M bit serial is controlled data;
The second optical module, the signal of telecommunication of N*M bit serial being controlled to data is converted to light signal, is transmitted through the fiber to described transmitting terminal;
Described transmitting terminal comprises:
The first optical module, the light signal of the N*M bit serial receiving by optical fiber being controlled to data is converted to the signal of telecommunication, and exports the first high speed serialization transceiver to;
The first high speed serialization transceiver, controls data by N*M bit serial and is converted to N*M bit parallel control data, and output N*M bit parallel is controlled data;
N haplotype data recovers module, the N*M bit parallel receiving is controlled to data to be shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel is controlled to data and recover, the control data acquisition M bit arranging after recovering is controlled data output;
Decoder module, controls decoding data to the M bit receiving, and obtains to control flow and export.
2. system according to claim 1, is characterized in that, described N haplotype data recovers module and comprises:
Data recovery unit, according to the multiple N of data Replica, the N*M bit parallel receiving is controlled to data to be shifted, revert to N haplotype data and copy the alignment thereof that front M bit parallel is controlled data, location N*M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, determines N Bit data corresponding to each bit control data;
Described data recovery unit is 0 value number and the 1 value number of the binary numeral of N Bit data relatively, when 0 value number is greater than 1 value number, the binary numeral of this bit being controlled to data is decided to be 0 value, when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value, obtains control data output after recovering;
Byte-aligned unit, determines byte boundary according to the pattern of coding protocol definition, according to byte boundary, the control data after the recovery receiving is arranged, and obtains M bit to be decoded and controls data and export decoder module to.
3. a receiving terminal, this receiving terminal connects a transmitting terminal by optical fiber, it is characterized in that, and this receiving terminal comprises:
Coding module, to the control stream receiving encode and output encoder after M bit parallel control data; Described M is natural number;
N haplotype data replication module, carries out N haplotype data to the M bit parallel control data after the coding receiving and copies, and output N*M bit parallel is controlled data; Described N is greater than 2 natural number;
The second high speed serialization transceiver, controls data transaction by the N*M bit parallel receiving and becomes N*M bit serial to control data, and output N*M bit serial is controlled data;
The second optical module, the signal of telecommunication of N*M bit serial being controlled to data is converted to light signal, is transmitted through the fiber to transmitting terminal.
4. receiving terminal according to claim 3, is characterized in that, described coding module is 8B/10B coding module;
Described M is 10, and described N is 10;
Described the second high speed serialization transceiver is operated on 2.5Gbps;
The message transmission rate that described N*M bit serial is controlled data is 250Mbps.
5. a transmitting terminal, this transmitting terminal connects a receiving terminal by optical fiber, it is characterized in that, and this transmitting terminal comprises:
The first optical module, the light signal of the N*M bit serial from receiving terminal receiving by optical fiber being controlled to data is converted to the signal of telecommunication, and exports the first high speed serialization transceiver to; Described M is natural number, and described N is greater than 2 natural number;
The first high speed serialization transceiver, controls data by N*M bit serial and is converted to N*M bit parallel control data, and output N*M bit parallel is controlled data;
N haplotype data recovers module, the N*M bit parallel receiving is controlled to data to be shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel is controlled to data and recover, the control data acquisition M bit arranging after recovering is controlled data output;
Decoder module, controls decoding data to the M bit receiving, and obtains to control flow and export.
6. transmitting terminal according to claim 5, is characterized in that, described N haplotype data recovers module and comprises:
Data recovery unit, according to the multiple N of data Replica, the N*M bit parallel receiving is controlled to data to be shifted, revert to N haplotype data and copy the alignment thereof that front M bit parallel is controlled data, location N*M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, determines N Bit data corresponding to each bit control data;
Described data recovery unit is 0 value number and the 1 value number of the binary numeral of N Bit data relatively, when 0 value number is greater than 1 value number, the binary numeral of this bit being controlled to data is decided to be 0 value, when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value, obtains control data output after recovering;
Byte-aligned unit, determines byte boundary according to the pattern of coding protocol definition, according to byte boundary, the control data after the recovery receiving is arranged, and obtains M bit to be decoded and controls data and export decoder module to.
7. according to the transmitting terminal described in claim 5 or 6, it is characterized in that, the message transmission rate that described N*M bit serial is controlled data is 250Mbps;
Described the first high speed serialization transceiver is operated on 2.5Gbps;
Described M is 10, and described N is 10;
Described decoder module is 8B/10B decoder module.
8. a multi-channel video optical fiber transmission method, is characterized in that, the method comprises:
Receiving terminal is encoded and is obtained the M bit parallel control data after coding the control stream receiving, and the M bit parallel control data after coding is carried out to N haplotype data and copy, and obtains N*M bit parallel and controls data;
Receiving terminal is controlled data transaction by N*M bit parallel and is become N*M bit serial to control data, and the signal of telecommunication of N*M bit serial being controlled to data is converted to light signal, is transmitted through the fiber to transmitting terminal;
The light signal that transmitting terminal is controlled data by N*M bit serial is converted to the signal of telecommunication, N*M bit serial is controlled to data and be converted to N*M bit parallel control data;
Transmitting terminal is controlled data by N*M bit parallel and is shifted, location M bit parallel is controlled the data boundary of each bit control data in data, according to data boundary, N*M bit parallel being controlled to data recovers, the control data acquisition M bit arranging after recovering is controlled data, and decoding M bit control data acquisition is controlled and flowed and export;
Described M is natural number, and described N is greater than 2 natural number.
9. method according to claim 8, is characterized in that, described location M bit parallel is controlled the data boundary of data, according to data boundary, N*M bit parallel is controlled to data and recovers to comprise:
A1, according to the multiple N of data Replica, the N*M bit parallel that receives is controlled to data and is shifted, the M bit parallel before reverting to N haplotype data and copying is controlled the alignment thereof of data;
A2, according to the multiple N of data Replica, location N*M bit parallel is controlled the data boundary that each bit in data is controlled data, obtains each bit and controls N Bit data corresponding to data;
0 value number of the binary numeral of A3, comparison N Bit data and the size of 1 value number, when 0 value number is greater than 1 value number, the binary numeral of this bit being controlled to data is decided to be 0 value, and when 0 value number is less than 1 value number, the binary numeral of this bit being controlled to data is decided to be 1 value;
A4, according to steps A 3, obtain the control data after M bits recover.
10. method according to claim 8, is characterized in that, the control data acquisition M bit control data that arrange after recovering comprise:
B1, the pattern defining according to coding protocol, determine byte boundary;
B2, according to byte boundary, the control data after recovering are arranged, obtain M bit to be decoded and control data.
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| CN104427377B (en) * | 2013-09-09 | 2018-05-18 | 杭州海康威视数字技术股份有限公司 | The point-to-point optical transmitter and receiver of polymorphic type business |
| CN104125227A (en) * | 2014-07-30 | 2014-10-29 | 刘鹏 | Physical isolation cross-network unidirectional optical transmission device and transmission method |
| CN104836754A (en) * | 2015-04-03 | 2015-08-12 | 盛科网络（苏州）有限公司 | Method and device for achieving backboard auto-negotiation function by means of high speed Serdes |
| CN105960764B (en) * | 2015-07-09 | 2018-10-16 | 深圳市视捷光电科技有限公司 | High-definition video signal optical transmission system, module pin define method and transmission method |
| CN106933767B (en) * | 2017-03-10 | 2020-04-24 | 重庆湃芯创智微电子有限公司 | Comma detection and word alignment method and system suitable for JESD204B protocol |
| CN108307129A (en) * | 2017-12-12 | 2018-07-20 | 天津津航计算技术研究所 | A kind of multi-channel optical fibre video switching system based on FC-AV agreements |
| CN109165001B (en) | 2018-08-24 | 2020-07-10 | 京东方科技集团股份有限公司 | Encoding method, device and display device |
| CN109413397B (en) * | 2018-12-05 | 2020-09-22 | 中航光电科技股份有限公司 | Low-delay resolution self-adaptive video optical fiber transmission coding and decoding method |
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