CN110891154A - Video fault-tolerant transmission system and fault-tolerant sending device - Google Patents

Video fault-tolerant transmission system and fault-tolerant sending device Download PDF

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CN110891154A
CN110891154A CN201911252286.1A CN201911252286A CN110891154A CN 110891154 A CN110891154 A CN 110891154A CN 201911252286 A CN201911252286 A CN 201911252286A CN 110891154 A CN110891154 A CN 110891154A
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data
video
module
data stream
fault
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CN110891154B (en
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王元龙
陈淼
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Norel Systems Ltd
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Norel Systems Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The invention discloses a video fault-tolerant transmission system which comprises a fault-tolerant transmitting device, a fault-tolerant receiving device, a first cable and a second cable, wherein the fault-tolerant transmitting device copies and segments received video data and adds check codes to generate a first data stream data packet and a second data stream data packet, serial data are transmitted to the fault-tolerant receiving device through the first cable and the second cable, the serial data of the first data stream data packet do not coincide with the serial data transmission time of the corresponding second data stream data packet, the fault-tolerant receiving device checks the first data stream data packet and the second data stream data packet, and outputs video data contained in the first data stream data packet with correct check or corresponding video data contained in the second data stream data packet with correct check.

Description

Video fault-tolerant transmission system and fault-tolerant sending device
Technical Field
The invention relates to the technical field of video transmission, in particular to a video fault-tolerant transmission system and a fault-tolerant sending device.
Background
At present, a cable is used for transmitting video data in a wired video transmission technology, and the wired transmission is relatively stable, has relatively high safety and relatively high transmission rate, so that large-scale adoption is achieved, in addition, the video transmission interface comprises a serial video interface and a parallel video interface, common serial video interfaces comprise HD-SDI, HDMI, DisplayPort, MIPI, LVDS and the like, and common parallel video interfaces comprise ITU-R BT.1120, ITU-R BT.656 and the like.
In recent years, due to the rapid upgrade of image resolution acquired by a camera from standard definition to high definition (1080P) or even ultra-high definition (2K/4K) and the popularization of multiple exposure technology and wide color gamut technology, along with the increase of data volume and transmission rate by times, high-definition cameras are successfully introduced into vehicle-mounted video markets represented by applications such as intelligent rearview mirrors, intelligent automobile recorders and Advanced Driving Assistance Systems (ADAS), the shipment volume of the vehicle-mounted video markets is beginning to be tens of millions, the fusion of vehicle-mounted video products has appeared, various devices combining vehicle navigation and vehicle entertainment are undergoing the process from standard definition to high definition, from analog to digital, from single function to intelligent multifunction, wherein the digital high-definition video transmission technology plays an extremely important role, and various interferences are easily caused due to the complex internal circuit of a vehicle and various electromagnetic radiations, this brings greater technical challenges to the vehicle-mounted video transmission application which requires strong stability, strong real-time performance, safety and reliability.
In the prior art, generally, a video sending end packs original video stream data and converts the original video stream data into serial data, and the serial data is transmitted at a medium distance and a long distance through a cable, a video receiving end restores the received serial data into a video stream data packet and restores the original video format and the video data, and in the process, if video transmission equipment or the cable is interfered by a burst, the receiving end is often difficult to or completely incapable of restoring the original video format and the original video data, and in sum, a method for stably and reliably transmitting the video stream data under a strong burst interference environment is lacked at present.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the video fault-tolerant transmission system and the fault-tolerant transmitting device are provided, a first data stream data packet and a second data stream data packet are generated by copying video stream data and adding a check code, and serial data are transmitted through a cable or two cables after being subjected to serialization and coding, wherein the serial data of the first data stream data packet and the serial data of the corresponding second data stream data packet are not overlapped in transmitting time, and the fault-tolerant capability and the anti-jamming capability of video transmission are improved through the method.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides a video fault-tolerant transmission system, which comprises a fault-tolerant transmitting device, a fault-tolerant receiving device, a first cable and a second cable,
the fault-tolerant transmitting device comprises a video input module, a video copying module, a first serial transmitting module and a second serial transmitting module,
the fault-tolerant receiving device comprises a video output module, a fault-tolerant module, a first serial receiving module and a second serial receiving module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the first serial transmission module is connected with a first cable, receives a first data stream of a transmitting end output by the video copying module, performs a serial adding operation to generate serial data and transmits the serial data to the fault-tolerant receiving device through the first cable, the generated serial data is embedded with transmitting clock information,
the second serial transmitting module is connected with a second cable, receives the second data stream of the transmitting end output by the video copying module, carries out the serialization operation, generates serial data and transmits the serial data to the fault-tolerant receiving device through the second cable, the generated serial data is embedded with transmitting clock information,
the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet,
the first serial receiving module is connected with a first cable, receives serial data from the first serial transmitting module of the fault-tolerant transmitting device through the first cable, performs clock and data recovery and deserialization operation to generate a receiving end first data stream, the receiving end first data stream is composed of first data stream data packets,
the second serial receiving module is connected with a second cable, receives serial data from a second serial sending module of the fault-tolerant sending device through the second cable, performs clock and data recovery and deserialization operation to generate a receiving end second data stream, the receiving end second data stream consists of second data stream data packets,
the fault-tolerant module receives a first data stream of a receiving end output by the first serial receiving module, and the fault-tolerant module receives a second data stream of the receiving end output by the second serial receiving module,
the fault-tolerant module checks the first data stream data packet, the fault-tolerant module checks the second data stream data packet, the fault-tolerant module outputs video data contained in the first data stream data packet which is checked to be correct or corresponding video data contained in the second data stream data packet which is checked to be correct,
the video output module is connected with the video receiving equipment, receives the video data output by the fault-tolerant module and sends the video data to the video receiving equipment.
Preferably, the check code added by the video copy module is cyclic redundancy check CRC coding.
Preferably, the check code added by the video copy module is an error correction code, the error-tolerant module corrects video data contained in the first data stream packet, the error-tolerant module corrects video data contained in the second data stream packet, and the error-tolerant module outputs the corrected video data contained in the first data stream packet with correct error or the corresponding corrected video data contained in the second data stream packet with correct error.
Preferably, the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet, and the serial data transmission time of the second data stream data packet is later than the serial data transmission time of the corresponding first data stream data packet.
Preferably, the second data stream at the sending end is processed by delaying, and the delay is configurable.
Preferably, the first and second serial transmission modules embed transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling.
Preferably, the first cable and the second cable are coaxial cables or twisted pairs.
Preferably, the video input module and the video output module conform to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-R BT.1120 or ITU-R BT.656 video interface protocols.
The invention provides a video fault-tolerant transmission system, which comprises a fault-tolerant transmitting device, a fault-tolerant receiving device and a first cable,
the fault-tolerant transmitting device comprises a video input module, a video copying module, a mixing module and a first serial transmitting module,
the fault-tolerant receiving device comprises a video output module, a fault-tolerant module, a de-mixing module and a first serial receiving module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the mixing module receives the first data stream of the sending end and the second data stream of the sending end output by the video copying module, and outputs the first data stream data packet and the second data stream data packet in a time-sharing manner to generate a mixed data stream of the sending end,
the first serial transmission module is connected with the first cable, receives the transmitting end mixed data stream output by the mixing module, carries out the serialization operation, generates serial data and transmits the serial data to the fault-tolerant receiving device through the first cable, the generated serial data is embedded with transmitting clock information,
the first serial receiving module is connected with a first cable, receives serial data from the first serial transmitting module of the fault-tolerant transmitting device through the first cable, performs clock and data recovery and deserialization operation to generate a receiving end mixed data stream, the receiving end mixed data stream comprises a first data stream data packet and a second data stream data packet which are transmitted in a time-sharing manner,
the de-mixing module receives the receiving end mixed data stream output by the first serial receiving module, de-mixes and outputs a receiving end first data stream and a receiving end second data stream, the receiving end first data stream is composed of first data stream data packets, the receiving end second data stream is composed of second data stream data packets,
the fault-tolerant module receives a first data stream at the receiving end and a second data stream at the receiving end which are output by the unmixing module,
the fault-tolerant module checks the first data stream data packet, the fault-tolerant module checks the second data stream data packet, the fault-tolerant module outputs video data contained in the first data stream data packet which is checked to be correct or corresponding video data contained in the second data stream data packet which is checked to be correct,
the video output module is connected with the video receiving equipment, receives the video data output by the fault-tolerant module and sends the video data to the video receiving equipment.
Preferably, the check code added by the video copy module is cyclic redundancy check CRC coding.
Preferably, the check code added by the video copy module is an error correction code, the error-tolerant module corrects video data contained in the first data stream packet, the error-tolerant module corrects video data contained in the second data stream packet, and the error-tolerant module outputs the corrected video data contained in the first data stream packet with correct error or the corresponding corrected video data contained in the second data stream packet with correct error.
Preferably, the second data stream packet serial data transmission time is later than the corresponding first data stream packet serial data transmission time.
Preferably, the second data stream at the sending end is processed by delaying, and the delay is configurable.
Preferably, the first serial transmission module embeds the transmission clock information in the serial data by encoding 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or a random scrambling code.
Preferably, the first cable is a coaxial cable or a twisted pair.
Preferably, the video input module and the video output module conform to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-R BT.1120 or ITU-R BT.656 video interface protocols.
The invention provides a fault-tolerant transmitting device, which comprises a video input module, a video copying module, a first serial transmitting module and a second serial transmitting module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the first serial transmission module receives the first data stream of the transmission end output by the video copying module, carries out the serial adding operation, generates and outputs serial data, embeds the generated serial data with transmission clock information,
the second serial transmission module receives the second data stream of the transmission end output by the video copying module, carries out the serial adding operation, generates and outputs serial data, embeds the transmission clock information in the generated serial data,
the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet.
Preferably, the check code added by the video copy module is cyclic redundancy check CRC coding.
Preferably, the check code added by the video copy module is an error correction code.
Further, the error correction code is a Reed-Solomon code, an ECC code, a BCH code, or an LDPC code.
Preferably, the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet, and the serial data transmission time of the second data stream data packet is later than the serial data transmission time of the corresponding first data stream data packet.
Preferably, the second data stream at the sending end is processed by delaying, and the delay is configurable.
Preferably, the first and second serial transmission modules embed transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling.
Preferably, the video input module conforms to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-RBT.1120, or ITU-R BT.656 video interface protocols.
The invention provides a fault-tolerant transmitting device, which comprises a video input module, a video copying module, a mixing module and a first serial transmitting module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the mixing module receives the first data stream of the sending end and the second data stream of the sending end output by the video copying module, and outputs the first data stream data packet and the second data stream data packet in a time-sharing manner to generate a mixed data stream of the sending end,
and the first serial sending module receives the sending end mixed data stream output by the mixing module, performs the serialization operation, generates and outputs serial data, and embeds the generated serial data with sending clock information.
Preferably, the check code added by the video copy module is cyclic redundancy check CRC coding.
Preferably, the check code added by the video copy module is an error correction code.
Further, the error correction code is a Reed-Solomon code, an ECC code, a BCH code, or an LDPC code.
Preferably, the second data stream packet serial data transmission time is later than the corresponding first data stream packet serial data transmission time.
Preferably, the second data stream at the sending end is processed by delaying, and the delay is configurable.
Preferably, the first serial transmission module embeds the transmission clock information in the serial data by encoding 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or a random scrambling code.
Preferably, the video input module conforms to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-RBT.1120, or ITU-R BT.656 video interface protocols.
Drawings
The invention is further illustrated with reference to the following figures and examples:
fig. 1 is a block diagram and an application of a video fault tolerant transmission system according to a first embodiment of the present invention.
Fig. 2 is a block diagram and an application of a second embodiment of a video fault tolerant transmission system according to the present invention.
Fig. 3 is a block diagram and an application of a video copy module of a video fault tolerant transmission system according to an embodiment of the present invention.
Fig. 4 is a block diagram and an application diagram of a second embodiment of a video copy module of a video fault tolerant transmission system according to the present invention.
Fig. 5 is a block diagram and an application of a third embodiment of a video copy module of a video fault tolerant transmission system according to the present invention.
Fig. 6 is a block diagram and an application of a fault-tolerant module of a video fault-tolerant transmission system according to an embodiment of the present invention.
Fig. 7 is a block diagram and an application of a fault-tolerant module of a video fault-tolerant transmission system according to a second embodiment of the present invention.
Fig. 8 is a timing diagram of a first data stream at a transmitting end and a second data stream at the transmitting end of the video fault-tolerant transmission system according to the present invention.
Fig. 9 is a timing diagram of a first data stream at a receiving end, a second data stream at the receiving end, and the first data stream delayed by the receiving end of the video fault-tolerant transmission system according to the present invention.
Fig. 10 is a structural diagram of a first data packet and a second data packet of a video fault-tolerant transmission system according to the present invention.
Fig. 11 is a timing diagram of a mixed data stream of a video fault tolerant transmission system of the present invention.
Wherein:
1 fault-tolerant transmitting device 2 fault-tolerant receiving device
3 first cable 4 second cable
5 video source 6 video receiving equipment
11 video input module 12 video copy module
13 first serial transmission module 14 second serial transmission module
15 hybrid module
110 sender-side first data stream 111 sender-side second data stream
112 sender side Mixed data streams
121 video input port 122 first output port
123 second output port 124 first check code adding module
125 sending delay module 126 second check code adding module
21 video output module 22 fault-tolerant module
23 first serial receiving module 24 second serial receiving module
25 unmixing module
210 receive side first data stream 211 receive side second data stream
212 receive side hybrid data stream 213 receive side delayed first data stream
221 select output port 222 first input port
223 second input port 224 receives the delay module
225 check selection module 226 first check module
227 second check module 228 alignment selection module
Detailed Description
The video fault-tolerant transmission system and the fault-tolerant transmitting device according to the present invention will be further described with reference to the embodiments in the drawings.
Fig. 1 shows a first embodiment of a video fault-tolerant transmission system according to the present invention, in which the video fault-tolerant transmission system includes a fault-tolerant transmitting device 1, a fault-tolerant receiving device 2, a first cable 3, and a second cable 4.
The fault-tolerant transmitting device 1 comprises a video input module 11, a video copying module 12, a first serial transmitting module 13 and a second serial transmitting module 14.
The fault-tolerant receiving device 2 comprises a video output module 21, a fault-tolerant module 22, a first serial receiving module 23 and a second serial receiving module 24.
The video input module 11 is connected to the video source 5, and the video input module 11 receives video data generated by the video source 5 and outputs the video data to the video copy module 12. The video input module 11 may further include a video compression module (not shown) for compressing a bandwidth required for the output video data.
The video copy module 12 receives the video data output by the video input module 11, and generates a first data stream 110 at the transmitting end and a second data stream 111 at the transmitting end.
The video copy module 12 segments the received video data and adds a check code to generate a first data stream packet, and the first data stream 110 at the transmitting end is composed of the first data stream packet.
The video copy module 12 generates a second data stream packet after segmenting the received video data and adding the check code, and the sending end second data stream 111 is composed of the second data stream packet.
The first and second data stream packet structures are shown in fig. 10. The first and second data packets may each include video data and a checksum, a sequence number field (not shown) indicating the sequence of the data packets, and an identification field (not shown) identifying whether the data packet is the first data packet or the second data packet.
As shown in fig. 3, 4, and 5, the video copy module 12 includes a video input port 121, a first output port 122, and a second output port 123, where the video copy module 12 receives the video data output by the video input module 11 through the video input port 121 to generate a sending-end first data stream 110 and a sending-end second data stream 111, the sending-end first data stream 110 is output through the first output port 122, and the sending-end second data stream 111 is output through the second output port 123.
Fig. 3 shows a first embodiment of the video replication module 12, in which the video replication module 12 sends the received video data to the first check code adding module 124 through the video input port 121, the first check code adding module 124 segments the received video data and adds a check code to generate a first data stream packet, the transmission delay module 125 receives the first data stream packet output by the first check code adding module 124 and performs delay processing on the first data stream packet to generate a second data stream packet, the video replication module 12 outputs the sender-side first data stream 110 through the first output port 122, the sender-side first data stream 110 is composed of the first data stream packet, the video replication module 12 outputs the sender-side second data stream 111 through the second output port 123, the sender-side second data stream 111 is composed of the second data stream packet, in the embodiment of the video replication module 12 shown in fig. 3, the first data stream data packet and the second data stream data packet have the same length.
Fig. 4 shows a second embodiment of the video replication module 12, the video replication module 12 sends the received video data to the first check code adding module 124 and the second check code adding module 126 through the video input port 121, the first check code adding module 124 segments the received video data and adds check codes to generate a first data stream packet, the second check code adding module 126 segments the received video data and adds check codes to generate a second data stream packet, the transmission delay module 125 receives the second data stream packet output by the second check code adding module 126 and performs delay processing on the second data stream packet to generate a delayed second data stream packet, the video replication module 12 outputs the sender-side first data stream 110 through the first output port 122, the sender-side first data stream 110 is composed of the first data stream packets, the video replication module 12 outputs the sender-side second data stream 111 through the second output port 123, the sending end second data stream 111 is composed of delayed second data stream packets, and in the embodiment of the video replication module 12 shown in fig. 4, the lengths of the first data stream packets and the second data stream packets may be different.
Fig. 5 shows a third embodiment of the video replication module 12, where the video replication module 12 sends the received video data to the first check code adding module 124 and the sending delay module 125 through the video input port 121, the first check code adding module 124 segments the received video data and adds a check code to generate a first data packet, the sending delay module 125 delays the received video data and sends the video data to the second check code adding module 126, the second check code adding module 126 receives the delayed video data and segments and adds a check code to generate a second data packet, the video replication module 12 outputs the sending-end first data stream 110 through the first output port 122, the sending-end first data stream 110 is composed of first data packet, the video replication module 12 outputs the sending-end second data stream 111 through the second output port 123, the sender-side second data stream 111 is composed of second data stream packets, and in the embodiment of the video replication module 12 shown in fig. 5, the lengths of the first data stream packets and the second data stream packets may be different.
In fig. 3, 4 and 5, the delay of the video copy module 12 for the second data stream 111 at the sending end may be implemented by a buffer formed by a Static Random Access Memory (SRAM), the delay may be configurable, and the maximum delay is determined by the size of the buffer.
The video data received by the video copy module 12 is copied into a first data stream packet and a second data stream packet and sent, if part or all of the video data contained in one first data stream packet and part or all of the video data contained in one second data stream packet are from the video data received by the same video copy module 12, the first data stream packet and the second data stream packet are mutually corresponding data packets, and the video data received by the same video copy module 12 contained in the first data stream packet and the second data stream packet are corresponding video data contained in the first data stream packet and the second data stream packet.
The check code added by video copy module 12 may be a cyclic redundancy check, CRC, code. The check code added by video duplication module 12 may also be an error correction code including, but not limited to, Reed-Solomon code, ECC code, BCH code, LDPC code, or the like. When the check code is an error correcting code, the data packet can be corrected, and the data packet error can be indicated if the data packet error cannot be corrected.
The first serial transmission module 13 is connected to the first cable 3, the first serial transmission module 13 receives the first data stream 110 output by the video duplication module 12, performs a serial operation, generates serial data, and transmits the serial data to the fault-tolerant receiving apparatus 2 through the first cable 3, wherein the generated serial data is embedded with transmission clock information.
The second serial transmission module 14 is connected to the second cable 4, the second serial transmission module 14 receives the second data stream 111 output by the video duplication module 12, performs a serialization operation, generates serial data, and transmits the serial data to the fault-tolerant receiving device 2 through the second cable 4, wherein the generated serial data is embedded with transmission clock information.
The serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet.
In the video duplication module 12 of fig. 3, 4 and 5, the time delay in the video duplication module 12 may be configured such that the serial data transmission time of the second data stream packet does not coincide with the serial data transmission time of the corresponding first data stream packet, and the time delay in the video duplication module 12 may also be configured such that the serial data transmission time of the second data stream packet is later than the serial data transmission time of the corresponding first data stream packet.
In other implementations of the fault-tolerant transmitting device 1, it is also possible by other embodiments of the video duplication module 12 to make the serial data transmission time of the second data stream data packet not coincide with the serial data transmission time of the corresponding first data stream data packet, and to make part of the serial data transmission time of the second data stream data packet earlier than the serial data transmission time of the corresponding first data stream data packet.
The first serial receiving module 23 is connected to the first cable 3, receives serial data from the first serial transmitting module 13 of the fault-tolerant transmitting apparatus 1 through the first cable 3, and performs clock and data recovery and deserialization operations to generate a receiving-end first data stream 210, where the receiving-end first data stream 210 is composed of first data stream packets.
The second serial receiving module 24 is connected to the second cable 4, receives the serial data from the second serial transmitting module 14 of the fault-tolerant transmitting apparatus 1 through the second cable 4, and performs clock and data recovery and deserialization operations to generate a receiving-end second data stream 211, where the receiving-end second data stream 211 is composed of second data stream data packets.
The fault tolerant module 22 receives the first data stream 210 output by the first serial receiving module 23, and the fault tolerant module 22 receives the second data stream 211 output by the second serial receiving module 24.
The fault tolerant module 22 checks the first data stream packet, the fault tolerant module 22 checks the second data stream packet, and the fault tolerant module 22 alternatively outputs the video data contained in the first data stream packet or the corresponding video data contained in the second data stream packet.
As shown in fig. 6 and 7, the fault tolerant module 22 includes a first input port 222, a second input port 223, and a selective output port 221, the fault tolerant module 22 receives the first data stream 210 at the receiving end output by the first serial receiving module 23 through the first input port 222, the fault tolerant module 22 receives the second data stream 211 at the receiving end output by the second serial receiving module 24 through the second input port 223, and the fault tolerant module 22 alternatively outputs the video data included in the first data stream data packet or the corresponding video data included in the second data stream data packet through the selective output port 221.
Fig. 6 shows a first embodiment of the fault tolerant module 22, in which the fault tolerant module 22 sends the received first data stream 210 of the receiving end to the receiving delay module 224 through the first input port 222, the fault tolerant module 22 sends the received second data stream 211 of the receiving end to the check selection module 225 through the second input port 223, the receiving delay module 224 performs delay processing on the first data stream 210 of the receiving end to generate the first data stream 213 after receiving end delay and sends the first data stream 213 to the check selection module 225, the check selection module 225 performs check or error correction processing on the first data stream data packet and the second data stream data packet respectively according to check codes included in the first data stream data packet and the second data stream data packet, when the check codes only have check function, for example, when the check codes are cyclic redundancy check CRC codes, the check selection module 225 selects the output port 221 to output video data included in the first data stream data packet that is checked correctly or corresponding video data included in the second data stream data packet that is checked correctly, when the check code is an error correction code, the check selection module 225 corrects the video data contained in the first data stream packet, checks the selection module 225 and corrects the video data contained in the second data stream packet, and the check selection module 225 outputs the corrected video data contained in the first data stream packet with correct error or the corresponding corrected video data contained in the second data stream packet with correct error.
Fig. 7 shows a second embodiment of the fault tolerant module 22, where the fault tolerant module 22 sends the received first data stream 210 at the receiving end to the first check module 226 through the first input port 222, the fault tolerant module 22 sends the received second data stream 211 at the receiving end to the second check module 227 through the second input port 223, the first check module 226 checks or corrects the received first data stream according to the check code contained in the first data stream packet, generates the first data stream packet after checking or correcting, and sends the first data stream packet to the alignment selection module 228, the second check module 227 checks or corrects the received second data stream packet according to the check code contained in the second data stream packet, generates the second data stream packet after checking or correcting, and sends the second data stream packet to the alignment selection module 228, the alignment selection module 228 performs delay processing on the first data stream packet after checking or correcting, when the check code only has a check function, if the check code is CRC coding, the alignment selection module 228 outputs the video data included in the first data stream packet with correct check or the corresponding video data included in the second data stream packet with correct check through the selection output port 221, and if the check code is an error correction code, the alignment selection module 228 outputs the video data after error correction included in the first data stream packet with correct error or the corresponding video data after error correction included in the second data stream packet with correct error correction.
In the video copy module 12 shown in fig. 3, 4 and 5, the second data stream packets are delayed in the fault-tolerant transmitting device 1, so that the first data stream packets need to be delayed correspondingly in the fault-tolerant receiving device 2, and the first data stream packets and the corresponding second data stream packets are aligned, so as to alternatively select and output the video data contained in the first data stream packets or the corresponding video data contained in the second data stream packets. In the fault tolerant module 22 shown in fig. 6, the first data stream packet is delayed by the receiving delay module 224, and in the fault tolerant module 22 shown in fig. 7, the delayed processing of the first data stream packet is included in the alignment selection module 228.
In fig. 6 and fig. 7, the fault-tolerant module 22 may implement the delay of the first data stream data packet by using a cache formed by a Static Random Access Memory (SRAM), and the maximum delay is determined by the size of the cache, and the size of the delay may be configured or determined by the fault-tolerant receiving device 2 by detecting the actual delay of the received second data stream data packet and the corresponding first data stream data packet.
The video output module 21 is connected to the video receiving device 6, and the video output module 21 receives the video data output by the fault tolerant module 22 and sends the video data to the video receiving device 6. The video output module 21 may further include a video decompression module (not shown), and when the video data output by the fault tolerant module 22 is compressed video data, the video output module 21 decompresses the compressed video data and then sends the decompressed video data to the video receiving apparatus 6.
Fig. 8 shows timing charts of the first data stream 110 and the second data stream 111 at the transmitting end based on the video copy module 12 shown in fig. 3, where the lengths of the first data stream packet and the second data stream packet in fig. 3 are the same, in the fault-tolerant transmitting apparatus 1, the delay length of the second data stream 111 at the transmitting end output by the video copy module 12 relative to the first data stream 110 at the transmitting end is T13, and T13 in fig. 8 is 3 data packet lengths, after the delay processing, the second data stream packet 1 in the second data stream 111 at the transmitting end is aligned with the first data stream packet 4 in the first data stream 110 at the transmitting end in time, and if the serial data transmitted over the first cable 3 and the second cable 4 are interfered at the interference time point shown in fig. 3, the second data stream packet 1 and the first data stream packet 4 are damaged at the same time. In other embodiments, T13 may be other delay sizes and the delay of the second data stream packet relative to the corresponding first data stream packet may vary from packet to packet.
Fig. 9 shows timing diagrams of the first data stream 210 at the receiving end, the second data stream 211 at the receiving end, and the first data stream 213 delayed by the receiving end based on the video duplication module 12 shown in fig. 3 and the fault-tolerant module 22 shown in fig. 6, where the timing diagram at the transmitting end is based on fig. 8, in the fault-tolerant receiving apparatus 2, the delay length of the first data stream 213 delayed by the receiving end output by the receiving delay module 224 in the fault-tolerant module 22 shown in fig. 6 relative to the first data stream 210 at the receiving end is T23, and T23 in fig. 9 is 3 data packet length, and after the delay processing, the first data stream 213 delayed by the receiving end is aligned with the second data stream 211 at the receiving end in time.
As shown in fig. 9, when the second data packet 1 in the second data stream 211 of the receiving end is damaged, the fault-tolerant module 22 fails to check the data packet, and when the first data packet 1 in the first data stream 213 is not damaged after the receiving end delays, the fault-tolerant module 22 checks the data packet correctly, so that the fault-tolerant module 22 outputs the video data included in the first data packet 1 and checked correctly.
As shown in fig. 9, after the receiving end delays, the first data stream packet 4 in the first data stream 213 is damaged, the fault-tolerant module 22 fails to check the data packet, the second data stream packet 4 in the second data stream 211 of the receiving end is not damaged, and the fault-tolerant module 22 checks the data packet correctly, so that the fault-tolerant module 22 outputs the video data included in the second data stream packet 4 and checked correctly.
The first serial transmission module 13 and the second serial transmission module 14 embed transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling, etc.
The first cable 3 and the second cable 4 are coaxial cables or twisted pair cables.
The video input module 11 and the video output module 21 conform to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-R BT.1120, or ITU-R BT.656 video interface protocols.
Fig. 2 shows a second embodiment of a video fault-tolerant transmission system according to the present invention, in which the video fault-tolerant transmission system includes a fault-tolerant transmitting device 1, a fault-tolerant receiving device 2, and a first cable 3.
The fault-tolerant transmitting device 1 comprises a video input module 11, a video copying module 12, a mixing module 15 and a first serial transmitting module 13.
The fault-tolerant receiving device 2 comprises a video output module 21, a fault-tolerant module 22, a de-mixing module 25 and a first serial receiving module 23.
The video input module 11 is connected to the video source 5, and the video input module 11 receives video data generated by the video source 5 and outputs the video data to the video copy module 12. The video input module 11 may further include a video compression module (not shown) for compressing a bandwidth required for the output video data.
The video copy module 12 receives the video data output by the video input module 11, and generates a first data stream 110 at the transmitting end and a second data stream 111 at the transmitting end.
The video copy module 12 segments the received video data and adds a check code to generate a first data stream packet, and the first data stream 110 at the transmitting end is composed of the first data stream packet.
The video copy module 12 generates a second data stream packet after segmenting the received video data and adding the check code, and the sending end second data stream 111 is composed of the second data stream packet.
Fig. 10 shows the structure of the first data stream packet and the second data stream packet, where the first data stream packet and the second data stream packet both include video data and a check code, and may also include a sequence number field (not shown) indicating the sequence of the data packets, and may also include an identification field (not shown) distinguishing whether the data packets are the first data stream packet or the second data stream packet.
Fig. 3, 4, and 5 show a first embodiment, a second embodiment, and a third embodiment of the video duplication module 12, respectively. The detailed structural and functional descriptions of fig. 3, fig. 4 and fig. 5 are given in the above description of fig. 1, which is a first embodiment of a video fault-tolerant transmission system according to the present invention, and will not be repeated here.
In fig. 3, 4, and 5, the delay of the video duplication module 12 for the second data stream 111 at the sending end may be implemented by a buffer memory formed by a Static Random Access Memory (SRAM), the delay may be configurable, and the maximum delay is determined by the size of the buffer memory.
The video data received by the video copy module 12 is copied into a first data stream packet and a second data stream packet and sent, if part or all of the video data contained in one first data stream packet and part or all of the video data contained in one second data stream packet are from the video data received by the same video copy module 12, the first data stream packet and the second data stream packet are mutually corresponding data packets, and the video data received by the same video copy module 12 contained in the first data stream packet and the second data stream packet are corresponding video data contained in the first data stream packet and the second data stream packet.
The check code added by video copy module 12 may be a cyclic redundancy check, CRC, code. The check code added by video duplication module 12 may also be an error correction code including, but not limited to, Reed-Solomon code, ECC code, BCH code, LDPC code, or the like. When the check code is an error correcting code, the data packet can be corrected, and the data packet error can be indicated if the data packet error cannot be corrected.
The mixing module 15 receives the first data stream 110 and the second data stream 111 from the video copy module 12, and time-divisionally outputs the first data stream packet and the second data stream packet to generate a mixed data stream 112 from the transmitting end.
The first serial transmission module 13 is connected to the first cable 3, and the first serial transmission module 13 receives the transmitting-end mixed data stream 112 output from the mixing module 15, performs a serializing operation, generates serial data, and transmits the serial data to the fault-tolerant receiving apparatus 2 via the first cable 3, and the generated serial data is embedded with transmission clock information.
In the video duplication module 12 of fig. 3, 4, 5, the time delay in the video duplication module 12 may be configured such that the second data stream packet serial data transmission time is later than the corresponding first data stream packet serial data transmission time.
In other implementations of the fault-tolerant transmitting device 1, the serial data transmission time of the partial second data stream packets may also be made earlier than the serial data transmission time of the corresponding first data stream packets by other embodiments of the video duplication module 12.
The first serial reception module 23 is connected to the first cable 3, receives serial data from the first serial transmission module 13 of the fault-tolerant transmission apparatus 1 via the first cable 3, and performs clock and data recovery and deserialization operations to generate a reception-side mixed data stream 212, where the reception-side mixed data stream 212 includes a first data stream packet and a second data stream packet that are transmitted in a time-sharing manner.
The unmixing module 25 receives the receiving-end mixed data stream 212 output by the first serial receiving module 23, unmixes and outputs a receiving-end first data stream 210 and a receiving-end second data stream 211, where the receiving-end first data stream 210 is composed of first data stream data packets, and the receiving-end second data stream 211 is composed of second data stream data packets.
The fault tolerant module 22 receives the receiving-side first data stream 210 and the receiving-side second data stream 211 output by the unmixing module 25.
The fault tolerant module 22 checks the first data stream packet, the fault tolerant module 22 checks the second data stream packet, and the fault tolerant module 22 alternatively outputs the video data contained in the first data stream packet or the corresponding video data contained in the second data stream packet.
Fig. 6 and 7 show a first and a second embodiment of the fault tolerant module 22, respectively. The detailed structural and functional descriptions of fig. 6 and fig. 7 are given in the above description of fig. 1, which is a first embodiment of a video fault-tolerant transmission system according to the present invention, and will not be repeated here.
When the check code in the first data stream packet and the second data stream packet only has a check function, for example, the check code is cyclic redundancy check CRC coding, the fault-tolerant module 22 outputs video data included in the first data stream packet which is checked correctly or corresponding video data included in the second data stream packet which is checked correctly, when the check code is an error correction code, the fault-tolerant module 22 corrects the video data included in the first data stream packet, and corrects the video data included in the second data stream packet, and the fault-tolerant module 22 outputs the corrected video data included in the first data stream packet which is corrected correctly or the corresponding corrected video data included in the second data stream packet which is corrected correctly.
In the video copy module 12 shown in fig. 3, 4 and 5, the second data stream packets are delayed in the fault-tolerant transmitting device 1, so that the first data stream packets need to be delayed correspondingly in the fault-tolerant receiving device 2, and the first data stream packets and the corresponding second data stream packets are aligned, so as to alternatively select and output the video data contained in the first data stream packets or the corresponding video data contained in the second data stream packets. In the fault tolerant module 22 shown in fig. 6, the first data stream packet is delayed by the receiving delay module 224, and in the fault tolerant module 22 shown in fig. 7, the delayed processing of the first data stream packet is included in the alignment selection module 228.
In fig. 6 and 7, the delaying of the first data stream data packet by the fault-tolerant module 22 may be implemented by a buffer memory formed by a Static Random Access Memory (SRAM), and the maximum delay is determined by a buffer size, which may be configured or determined by the fault-tolerant receiving apparatus 2 by detecting an actual delay of the received second data stream data packet and the corresponding first data stream data packet.
The video output module 21 is connected to the video receiving device 6, and the video output module 21 receives the video data output by the fault tolerant module 22 and sends the video data to the video receiving device 6. The video output module 21 may further include a video decompression module (not shown), and when the video data output by the fault tolerant module 22 is compressed video data, the video output module 21 decompresses the compressed video data and then sends the decompressed video data to the video receiving apparatus 6.
Fig. 8 shows timing charts of the first data stream 110 at the transmitting end and the second data stream 111 at the transmitting end based on the video duplication module 12 shown in fig. 3, where the lengths of the first data stream packet and the second data stream packet in fig. 3 are the same, in the fault-tolerant transmitting apparatus 1, the delay length of the second data stream 111 at the transmitting end output by the video duplication module 12 relative to the first data stream 110 at the transmitting end is T13, and T13 in fig. 8 is 3 data packet lengths, and after the delay processing, the second data stream packet 1 in the second data stream 111 at the transmitting end is aligned with the first data stream packet 4 in the first data stream 110 at the transmitting end in time. In other embodiments, T13 may be other delay sizes and the delay of the second data stream packet relative to the corresponding first data stream packet may vary from packet to packet.
Fig. 11 is a timing chart illustrating that the mixing module 15 receives the first data stream 110 at the transmitting end and the second data stream 111 at the transmitting end output by the video duplication module 12 shown in fig. 8, and time-divisionally outputs the first data stream data packet and the second data stream data packet to generate the mixed data stream 112 at the transmitting end. Fig. 11 is a timing diagram of the receiving mixed data stream 212.
If the serial data transmitted on the first cable 3 is interfered at the interference time point as shown in fig. 11, the second data packet 1 and the first data packet 4 may be damaged.
The unmixing module 25 receives the receiving-side mixed data stream 212, unmixes and outputs a receiving-side first data stream 210 and a receiving-side second data stream 211.
Fig. 9 shows timing diagrams of the first data stream 210 at the receiving end, the second data stream 211 at the receiving end, and the first data stream 213 delayed by the receiving end based on the video duplication module 12 shown in fig. 3 and the fault-tolerant module 22 shown in fig. 6, where the timing diagram at the transmitting end is based on fig. 11, in the fault-tolerant receiving apparatus 2, the delay length of the first data stream 213 delayed by the receiving end output by the receiving delay module 224 in the fault-tolerant module 22 shown in fig. 6 relative to the first data stream 210 at the receiving end is T23, and T23 in fig. 9 is 3 data packet length, and after the delay processing, the first data stream 213 delayed by the receiving end is aligned with the second data stream 211 at the receiving end in time.
As shown in fig. 9, when the second data packet 1 in the second data stream 211 of the receiving end is damaged, the fault-tolerant module 22 fails to check the data packet, and when the first data packet 1 in the first data stream 213 is not damaged after the receiving end delays, the fault-tolerant module 22 checks the data packet correctly, so that the fault-tolerant module 22 outputs the video data included in the first data packet 1 and checked correctly.
As shown in fig. 9, after the receiving end delays, the first data stream packet 4 in the first data stream 213 is damaged, the fault-tolerant module 22 fails to check the data packet, the second data stream packet 4 in the second data stream 211 of the receiving end is not damaged, and the fault-tolerant module 22 checks the data packet correctly, so that the fault-tolerant module 22 outputs the video data included in the second data stream packet 4 and checked correctly.
The first serial transmission module 13 embeds the transmission clock information in the serial data by encoding, such as 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling, etc.
The first cable 3 is a coaxial cable or a twisted pair.
The video input module 11 and the video output module 21 conform to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-R BT.1120, or ITU-R BT.656 video interface protocols.
The invention relates to a video fault-tolerant transmission system and a fault-tolerant transmitting device, which are characterized in that a first data stream data packet and a second data stream data packet are generated by copying video stream data and adding a check code, and are subjected to serialization and coding, and then serial data are transmitted through a cable or two cables, wherein the serial data of the first data stream data packet and the serial data of the corresponding second data stream data packet are not overlapped in transmitting time, and the fault-tolerant capability and the anti-jamming capability of real-time video transmission are improved by the method.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and the scope of the invention is defined by the appended claims, and all simple changes, equivalents, and combinations of the above embodiments that are made according to the technical spirit of the present invention will still fall within the scope of the claims.

Claims (32)

1. A video fault-tolerant transmission system comprises a fault-tolerant transmitting device, a fault-tolerant receiving device, a first cable and a second cable, and is characterized in that:
the fault-tolerant transmitting device comprises a video input module, a video copying module, a first serial transmitting module and a second serial transmitting module,
the fault-tolerant receiving device comprises a video output module, a fault-tolerant module, a first serial receiving module and a second serial receiving module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the first serial transmission module is connected with a first cable, receives a first data stream of a transmitting end output by the video copying module, performs a serial adding operation to generate serial data and transmits the serial data to the fault-tolerant receiving device through the first cable, the generated serial data is embedded with transmitting clock information,
the second serial transmitting module is connected with a second cable, receives the second data stream of the transmitting end output by the video copying module, carries out the serialization operation, generates serial data and transmits the serial data to the fault-tolerant receiving device through the second cable, the generated serial data is embedded with transmitting clock information,
the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet,
the first serial receiving module is connected with a first cable, receives serial data from the first serial transmitting module of the fault-tolerant transmitting device through the first cable, performs clock and data recovery and deserialization operation to generate a receiving end first data stream, the receiving end first data stream is composed of first data stream data packets,
the second serial receiving module is connected with a second cable, receives serial data from a second serial sending module of the fault-tolerant sending device through the second cable, performs clock and data recovery and deserialization operation to generate a receiving end second data stream, the receiving end second data stream consists of second data stream data packets,
the fault-tolerant module receives a first data stream of a receiving end output by the first serial receiving module, and the fault-tolerant module receives a second data stream of the receiving end output by the second serial receiving module,
the fault-tolerant module checks the first data stream data packet, the fault-tolerant module checks the second data stream data packet, the fault-tolerant module outputs video data contained in the first data stream data packet which is checked to be correct or corresponding video data contained in the second data stream data packet which is checked to be correct,
the video output module is connected with the video receiving equipment, receives the video data output by the fault-tolerant module and sends the video data to the video receiving equipment.
2. A video fault tolerant transmission system according to claim 1, characterized in that:
and the check code added by the video copying module is Cyclic Redundancy Check (CRC) code.
3. A video fault tolerant transmission system according to claim 1, characterized in that:
the check code added by the video copying module is an error correcting code, the fault-tolerant module corrects video data contained in the first data stream data packet, the fault-tolerant module corrects video data contained in the second data stream data packet, and the fault-tolerant module outputs the corrected video data contained in the first data stream data packet with correct error or the corresponding corrected video data contained in the second data stream data packet with correct error.
4. A video fault tolerant transmission system according to claim 1, characterized in that:
the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet, and the serial data transmission time of the second data stream data packet is later than the serial data transmission time of the corresponding first data stream data packet.
5. A video fault tolerant transmission system according to claim 1, characterized in that:
and the second data stream of the sending end is subjected to delay processing, and the delay is configurable.
6. A video fault tolerant transmission system according to claim 1, characterized in that:
the first and second serial transmission modules embed transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling.
7. A video fault tolerant transmission system according to claim 1, characterized in that:
the first cable and the second cable are coaxial cables or twisted pairs.
8. A video fault tolerant transmission system according to claim 1, characterized in that:
the video input module and the video output module conform to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-RBT.1120 or ITU-R BT.656 video interface protocols.
9. A video fault-tolerant transmission system comprises a fault-tolerant transmitting device, a fault-tolerant receiving device and a first cable, and is characterized in that:
the fault-tolerant transmitting device comprises a video input module, a video copying module, a mixing module and a first serial transmitting module,
the fault-tolerant receiving device comprises a video output module, a fault-tolerant module, a de-mixing module and a first serial receiving module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the mixing module receives the first data stream of the sending end and the second data stream of the sending end output by the video copying module, and outputs the first data stream data packet and the second data stream data packet in a time-sharing manner to generate a mixed data stream of the sending end,
the first serial transmission module is connected with the first cable, receives the transmitting end mixed data stream output by the mixing module, carries out the serialization operation, generates serial data and transmits the serial data to the fault-tolerant receiving device through the first cable, the generated serial data is embedded with transmitting clock information,
the first serial receiving module is connected with a first cable, receives serial data from the first serial transmitting module of the fault-tolerant transmitting device through the first cable, performs clock and data recovery and deserialization operation to generate a receiving end mixed data stream, the receiving end mixed data stream comprises a first data stream data packet and a second data stream data packet which are transmitted in a time-sharing manner,
the de-mixing module receives the receiving end mixed data stream output by the first serial receiving module, de-mixes and outputs a receiving end first data stream and a receiving end second data stream, the receiving end first data stream is composed of first data stream data packets, the receiving end second data stream is composed of second data stream data packets,
the fault-tolerant module receives a first data stream at the receiving end and a second data stream at the receiving end which are output by the unmixing module,
the fault-tolerant module checks the first data stream data packet, the fault-tolerant module checks the second data stream data packet, the fault-tolerant module outputs video data contained in the first data stream data packet which is checked to be correct or corresponding video data contained in the second data stream data packet which is checked to be correct,
the video output module is connected with the video receiving equipment, receives the video data output by the fault-tolerant module and sends the video data to the video receiving equipment.
10. A video fault tolerant transmission system according to claim 9, characterized in that:
and the check code added by the video copying module is Cyclic Redundancy Check (CRC) code.
11. A video fault tolerant transmission system according to claim 9, characterized in that:
the check code added by the video copying module is an error correcting code, the fault-tolerant module corrects video data contained in the first data stream data packet, the fault-tolerant module corrects video data contained in the second data stream data packet, and the fault-tolerant module outputs the corrected video data contained in the first data stream data packet with correct error or the corresponding corrected video data contained in the second data stream data packet with correct error.
12. A video fault tolerant transmission system according to claim 9, characterized in that:
and the serial data transmission time of the second data stream data packet is later than that of the corresponding first data stream data packet.
13. A video fault tolerant transmission system according to claim 9, characterized in that:
and the second data stream of the sending end is subjected to delay processing, and the delay is configurable.
14. A video fault tolerant transmission system according to claim 9, characterized in that:
the first serial transmission module embeds transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling.
15. A video fault tolerant transmission system according to claim 9, characterized in that:
the first cable is a coaxial cable or a twisted pair.
16. A video fault tolerant transmission system according to claim 9, characterized in that:
the video input module and the video output module conform to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-RBT.1120 or ITU-R BT.656 video interface protocols.
17. A fault tolerant transmitter apparatus, comprising:
the fault-tolerant transmitting device comprises a video input module, a video copying module, a first serial transmitting module and a second serial transmitting module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the first serial transmission module receives the first data stream of the transmission end output by the video copying module, carries out the serial adding operation, generates and outputs serial data, embeds the generated serial data with transmission clock information,
the second serial transmission module receives the second data stream of the transmission end output by the video copying module, carries out the serial adding operation, generates and outputs serial data, embeds the transmission clock information in the generated serial data,
the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet.
18. The fault-tolerant transmitter of claim 17, wherein:
and the check code added by the video copying module is Cyclic Redundancy Check (CRC) code.
19. The fault-tolerant transmitter of claim 17, wherein:
the check code added by the video copying module is an error correcting code.
20. The fault-tolerant transmitter of claim 19, wherein:
the error correcting code is a Reed-Solomon code, an ECC code, a BCH code or an LDPC code.
21. The fault-tolerant transmitter of claim 17, wherein:
the serial data transmission time of the second data stream data packet does not coincide with the serial data transmission time of the corresponding first data stream data packet, and the serial data transmission time of the second data stream data packet is later than the serial data transmission time of the corresponding first data stream data packet.
22. The fault-tolerant transmitter of claim 17, wherein:
and the second data stream of the sending end is subjected to delay processing, and the delay is configurable.
23. The fault-tolerant transmitter of claim 17, wherein:
the first and second serial transmission modules embed transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling.
24. The fault-tolerant transmitter of claim 17, wherein:
the video input module conforms to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-R BT.1120 or ITU-R BT.656 video interface protocols.
25. A fault tolerant transmitter apparatus, comprising:
the fault-tolerant transmitting device comprises a video input module, a video copying module, a mixing module and a first serial transmitting module,
the video input module is connected with a video source, receives video data generated by the video source and outputs the video data to the video copying module,
the video copying module receives the video data output by the video input module and generates a first data stream of a sending end and a second data stream of the sending end,
the video copying module segments the received video data and adds check codes to generate a first data stream data packet, the first data stream of the sending end is composed of the first data stream data packet,
the video copying module generates a second data stream data packet after segmenting the received video data and adding the check code, the second data stream of the sending end is composed of the second data stream data packet,
the mixing module receives the first data stream of the sending end and the second data stream of the sending end output by the video copying module, and outputs the first data stream data packet and the second data stream data packet in a time-sharing manner to generate a mixed data stream of the sending end,
and the first serial sending module receives the sending end mixed data stream output by the mixing module, performs the serialization operation, generates and outputs serial data, and embeds the generated serial data with sending clock information.
26. The fault-tolerant transmitter of claim 25, wherein:
and the check code added by the video copying module is Cyclic Redundancy Check (CRC) code.
27. The fault-tolerant transmitter of claim 25, wherein:
the check code added by the video copying module is an error correcting code.
28. The fault-tolerant transmitter of claim 27, wherein:
the error correcting code is a Reed-Solomon code, an ECC code, a BCH code or an LDPC code.
29. The fault-tolerant transmitter of claim 25, wherein:
and the serial data transmission time of the second data stream data packet is later than that of the corresponding first data stream data packet.
30. The fault-tolerant transmitter of claim 25, wherein:
and the second data stream of the sending end is subjected to delay processing, and the delay is configurable.
31. The fault-tolerant transmitter of claim 25, wherein:
the first serial transmission module embeds transmission clock information in serial data by encoding, which is 8b/10b encoding, 64b/66b encoding, 128b/130b encoding, or random scrambling.
32. The fault-tolerant transmitter of claim 25, wherein:
the video input module conforms to SDI, HDMI, DisplayPort, MIPI, LVDS, ITU-R BT.1120 or ITU-R BT.656 video interface protocols.
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