A high-definition video signal transmission system based on optical signals

Abstract

The application discloses a high-definition video signal transmission system based on optical signals, relates to the technical field of video signal transmission, and solves the technical problems that it is difficult to reasonably divide video signals, it is difficult to manage signal transmission and allocate signals in the process of video stream signal transmission, and it is inconvenient to guarantee stable and safe transmission of high-definition video signals, and comprises a center node, an optical fiber network and video transmission nodes, all of which are provided with a plurality of video transmission nodes; by dividing video signals into a plurality of independent video streams, it is convenient to flexibly allocate according to network bandwidth and node performance, and the overall transmission efficiency is improved; the compressed independent video streams can be transmitted through the network more quickly, the waiting time of data packets is reduced, and the overall delay is reduced; different video streams can be dynamically allocated to different optical fibers according to actual needs, and higher efficient resource utilization and load balancing are realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of video signal transmission, and particularly relates to a high-definition video signal transmission system based on optical signals. BACKGROUND

[0002] With the rapid development of digitalization and network technology, the demand for high-definition video content in daily life and various applications, including video surveillance, remote medical treatment, online education, virtual meetings, etc., is increasing. These applications have higher requirements for the quality, speed and stability of video transmission. Traditional copper cable transmission methods have certain limitations in terms of bandwidth, distance and anti-interference capability, and are difficult to meet the demand for high-definition video signal high-flow and high-speed transmission. Optical fiber communication technology has become an important means to solve this problem due to its superior performance, such as high bandwidth, long-distance transmission and anti-electromagnetic interference. Therefore, a video signal transmission system based on optical signals has gradually attracted attention, providing an effective and reliable transmission scheme for high-definition video signals. The high-definition video signal transmission system based on optical signals refers to a system that uses optical fiber communication technology to process high-definition video signals through a codec and transmits high-speed and large-capacity data in the form of optical signals.

[0003] The existing high-definition video signal transmission system directly converts video signals into optical signals for transmission through optical fibers, which is difficult to reasonably divide the video signals. At the same time, the direct transmission of video signals through optical fibers lacks the setting of video transmission nodes, making it difficult to manage and distribute signals during the transmission of video stream signals, and inconvenient to ensure the stable and safe transmission of high-definition video signals. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a high-definition video signal transmission system based on optical signals, which is used to solve the technical problem that it is difficult to reasonably divide video signals, and at the same time, it is difficult to manage and distribute signals during the transmission of video stream signals, and it is inconvenient to ensure the stable and safe transmission of high-definition video signals.

[0005] To solve the above problems, the first aspect of the present application provides a high-definition video signal transmission system based on optical signals, comprising: a center node, an optical fiber network and a video transmission node, all video transmission nodes are provided with a plurality of video transmission nodes, each video transmission node is connected to the two video transmission nodes closest to it through the optical fiber of the optical fiber network, and all video transmission nodes are connected to the center node through the optical fiber network.

[0006] The center node comprises:

[0007] The video signal processing module divides the input high-definition video signal into several independent video streams, compresses each video stream through a codec, and sends the compressed video stream to the central switch;

[0008] The video stream distribution module receives the video stream signals of each high-definition video signal and converts them into optical signals, encodes the optical fibers of the optical fiber network, distributes the video stream signals of the same high-definition video signal to the optical fibers according to the signal transmission performance of the video transmission nodes, and sends the optical fiber distribution data of the video stream to the video transmission nodes.

[0009] The optical fiber network is used to multiplex the optical signals of video streams of different wavelengths in the same optical fiber for transmission.

[0010] The video transmission node is used to obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the distribution optical fiber according to the video stream optical fiber distribution data of the high-definition video signal, integrate and distribute the video stream of the same high-definition video signal to the same optical fiber for transmission, and evaluate the signal transmission performance of the video transmission node and send the evaluation data to the central node.

[0011] As a further scheme of the present application, the video signal processing module divides the input high-definition video signal into several independent video streams, compresses each video stream through a codec, and sends the compressed video stream to the central switch, comprising the following steps:

[0012] The video receiving node comprises:

[0013] The signal processing module receives the video stream signals of the high-definition video signals from the optical fibers through an optical detector, converts them into electrical signals, and fuses the video stream signals converted into electrical signals into the original high-definition video signals according to the distribution mapping relationship data.

[0014] The decoder decodes and demodulates the electrical signals converted by the signal processing module at the receiving end, and restores the original high-definition video signals.

[0015] As a further scheme of the present application, the video signal processing module divides the input high-definition video signal into several independent video streams, compresses each video stream through a codec, and sends the compressed video stream to the central switch, comprising the following steps:

[0016] The received video signal is parsed into video frames, and a coordinate system is established in each video frame, with the midpoint of the length and width of the video frame as the origin of the coordinate system.

[0017] The pixel point information in the first quadrant, the second quadrant, the third quadrant and the fourth quadrant of the coordinate system of each video frame is divided into independent video streams.

[0018] If there are pixel points on the coordinate system, the pixel points on the coordinate system are divided into an independent video stream, and if there are no pixel points, no video stream is divided.

[0019] The divided independent video stream is numbered, and the distribution mapping relationship data of each independent video stream signal and the high-definition video signal is generated. The distribution mapping relationship data is added at the end of the numbered video stream data, and is compressed by the codec and sent to the central switch.

[0020] As a further scheme of the present application, the video stream distribution module receives the video stream signal of each high-definition video signal and converts it into an optical signal, including the following steps:

[0021] The video stream signal and the distribution mapping relationship data are converted into an optical signal by the modulator.

[0022] The video stream signal and the distribution mapping relationship data are converted into an optical signal by the modulator.

[0023] As a further scheme of the present application, the optical fiber of the optical fiber network is encoded, and the video stream signal of the same high-definition video signal is distributed to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and the optical fiber distribution data of the video stream is sent to the video transmission node, including the following steps:

[0024] The video transmission node is numbered, and the optical fiber of the optical fiber network is encoded according to the video transmission node connected by the optical fiber of the optical fiber network.

[0025] According to the video receiving node of the high-definition video signal, the video transmission node number connected by the video receiving node is obtained, the video transmission node is selected as the receiver according to the signal transmission performance of the video transmission node, and if no qualified transmission node is selected, the video receiving node error information is sent out;

[0026] The encoding data of the optical fiber connected by the video transmission node selected as the receiver is obtained, and the data request encoding is generated, the video stream signal of the same high-definition video signal is randomly distributed to the obtained optical fiber for transmission, and the optical fiber distribution data of the video stream and the data request encoding are sent to the video transmission node.

[0027] As a further scheme of the present application, the video transmission node is selected as the receiver according to the signal transmission performance of the video transmission node, including the following steps:

[0028] According to the signal transmission performance of the video transmission node, the video transmission node is sorted from high to low, and the video transmission node with signal transmission performance greater than a preset threshold is selected as the receiver.

[0029] If the video transmission node has not been evaluated for signal transmission performance, the video transmission node is added to the receiver.

[0030] If two or more video transmission nodes are not screened, the signal transmission performance is not zero, and the top 1-2 video transmission nodes are added to the receiver, and if no video transmission node is screened, no further screening is performed.

[0031] As a further scheme of the application: the video transmission node comprises:

[0032] The video signal integration module: according to the number of the allocated optical fiber in the high-definition video signal video stream optical fiber distribution data, sends a data request code to the video transmission node corresponding to the allocated optical fiber, acquires the video stream data of the same high-definition video signal from the video transmission node corresponding to the allocated optical fiber, and integrates the video stream of the same high-definition video signal to the corresponding transmission optical fiber according to the video receiving node set by the high-definition video signal;

[0033] The WDM wave division multiplexing module: the video signal integration module integrates the video stream signal of the same high-definition video signal into the same optical fiber through different wavelengths for transmission;

[0034] The signal monitoring module: the video stream of the video transmission node is detected for traffic, and the device state of the video transmission node is monitored in real time through SNMP and other protocols, the running log of the device is read, the video stream signal transmission speed, bandwidth utilization and device error times of the video transmission node are acquired, the signal transmission performance of the video transmission node is evaluated, and the evaluation data is sent to the center node.

[0035] As a further scheme of the application: the signal monitoring module detects the traffic of the video stream of the video transmission node, and monitors the device state of the video transmission node in real time through SNMP and other protocols, reads the running log of the device, acquires the video stream signal transmission speed, bandwidth utilization and device error times of the video transmission node, evaluates the signal transmission performance of the video transmission node, and sends the evaluation data to the center node, comprising the following steps:

[0036] The traffic of the video stream of the video transmission node is detected, and the device state of the video transmission node is monitored in real time through SNMP and other protocols, the device state, including: device temperature and device storage environment temperature;

[0037] The running log of the device is read, and the video stream signal transmission speed, bandwidth utilization and device error times data of the video transmission node in the running log are read;

[0038] If the device temperature, the device storage environment temperature or the device error times are greater than the maximum preset threshold, the signal transmission performance of the corresponding video transmission node is directly assigned as 0, and the signal transmission performance of the video transmission node is not evaluated, otherwise, the signal transmission performance of the video transmission node is evaluated;

[0039] By acquiring the device state data of the video transmission node, and the video stream signal transmission speed, bandwidth utilization rate and device error number, the signal transmission performance of the video transmission node is evaluated, and the evaluation data is sent to the center node.

[0040] As a further scheme of the application: the signal transmission performance of the video transmission node is evaluated by the following formula:

[0041]

[0042] Wherein Y is the evaluation value of the signal transmission performance of the video transmission node, a0 is the safe running temperature of the device of the video transmission node, a i is the detection temperature of the i-th device of the video transmission node, b0 is the safe running environment temperature of the device of the video transmission node, b1 is the detected environment temperature of the video transmission node, V is the detected video stream signal transmission speed of the video transmission node, f is the detected bandwidth utilization rate of the video transmission node, V0 is the average value of the detected video stream signal transmission speed of all video transmission nodes, c0 is the average value of the device error number of all video transmission nodes, and c1 is the device error number of the video transmission node.

[0043] Compared with the prior art, the beneficial effects of the application are:

[0044] The video signal processing module of the center node is arranged to divide the input high-definition video signal into a plurality of independent video streams, and each video stream is compressed by a codec and sent to a center switch. The video signal is divided into a plurality of independent video streams, which can be flexibly allocated according to the network bandwidth and node performance to improve the overall transmission efficiency. The divided and compressed video streams can be transmitted faster through the network, reducing the waiting time of data packets and thus reducing the overall delay.

[0045] The video signal is divided into a plurality of independent video streams, which can be flexibly allocated according to the network bandwidth and node performance to improve the overall transmission efficiency. The compressed independent video streams can be transmitted faster through the network, reducing the waiting time of data packets and thus reducing the overall delay. Different video streams can be dynamically allocated to different optical fibers according to actual needs to achieve more efficient resource utilization and load balancing. If a certain optical fiber fails, other video streams can continue to be transmitted, and the corresponding video streams can be extracted and retransmitted, avoiding the entire video signal to be retransmitted, improving the fault tolerance and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0047] Fig. 1 The system framework schematic diagram of the present application;

[0048] Fig. 2 The framework schematic diagram of the video transmission node of the present application. DETAILED DESCRIPTION

[0049] The technical solutions of the present application will be described clearly and completely in the following with embodiments. Obviously, the described embodiments only represent some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0050] Please refer to Figs. 1-2 The first aspect embodiment of the present application provides a high-definition video signal transmission system based on optical signals, comprising a center node, an optical fiber network and video transmission nodes. All the video transmission nodes are provided with a plurality of video transmission nodes. Each of the video transmission nodes is connected with two video transmission nodes closest to it through the optical fiber of the optical fiber network, and all the video transmission nodes are connected to the center node through the optical fiber network.

[0051] The center node comprises:

[0052] The video signal processing module divides the input high-definition video signal into a plurality of independent video streams, and sends each video stream to the center switch after compression by a codec.

[0053] The video stream distribution module is used for receiving the video stream signals of each high-definition video signal and converting them into optical signals. The optical fiber of the optical fiber network is encoded, and the video stream signals of the same high-definition video signal are distributed to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and the optical fiber distribution data of the video stream is sent to the video transmission node.

[0054] The optical fiber network is used for multiplexing the optical signals of a plurality of different wavelengths in the same optical fiber for transmission.

[0055] The video transmission node is configured to obtain video stream data of the same high-definition video signal from the video transmission node corresponding to the distribution optical fiber according to video stream optical fiber distribution data of the high-definition video signal, and integrate and distribute the video stream of the same high-definition video signal into the same optical fiber for transmission.

[0056] Specifically, in the embodiment, each video transmission node is connected to two video transmission nodes closest to it through an optical fiber of the optical fiber network, and all video transmission nodes are connected to the central node through the optical fiber network, so that all video transmission nodes are connected to the optical fiber network, and the video stream can be transmitted to a designated video transmission node through mutual transmission between the video transmission nodes.

[0057] The video signal processing module of the central node divides the input high-definition video signal into a plurality of independent video streams, compresses each video stream through a codec, and sends the compressed video stream to the central switch.

[0058] The video stream distribution module receives the video stream signals of each high-definition video signal and converts them into optical signals, encodes the optical fibers of the optical fiber network, and distributes the video stream signals of the same high-definition video signal into the optical fibers according to the signal transmission performance of the video transmission nodes for transmission, and sends the optical fiber distribution data of the video stream to the video transmission nodes.

[0059] The video signal is divided into a plurality of independent video streams, which facilitates flexible allocation according to network bandwidth and node performance to improve overall transmission efficiency. The compressed independent video stream can be transmitted faster through the network, reducing the waiting time of the data packet, thereby reducing the overall delay. Different video streams can be dynamically allocated to different optical fibers according to actual needs to achieve more efficient resource utilization and load balancing. If a certain optical fiber fails, other video streams can continue to be transmitted, and the corresponding video stream can be extracted and retransmitted, avoiding the entire video signal to be retransmitted, improving the fault tolerance and reliability of the system. The video stream is distributed to different optical fibers for transmission, which can reasonably allocate bandwidth resources according to the transmission performance of each optical fiber and the transmission requirements of the video stream, help optimize resource utilization, avoid bandwidth waste, improve the overall performance of the system, and improve the security of the entire video signal transmission.

[0060] In one embodiment of the present application, it further comprises:

[0061] The video receiving node comprises:

[0062] signal processing module: receiving the video stream signal of the high-definition video signal from the optical fiber through the optical detector, and converting it into an electrical signal, and fusing the video stream signal converted into an electrical signal into the original high-definition video signal according to the distribution mapping relationship data;

[0063] decoder: decoding and demodulating the electrical signal converted by the signal processing module at the receiving end to restore the original high-definition video signal.

[0064] In one embodiment of the present application, the video signal processing module divides the input high-definition video signal into several independent video streams, and sends each video stream to the central switch after compression by the codec, including the following steps:

[0065] The received video signal is parsed into video frames, and a coordinate system is established in each video frame, with the midpoint of the length and width of the video frame as the origin of the coordinate system.

[0066] The pixel point information in the first quadrant, the second quadrant, the third quadrant and the fourth quadrant of the coordinate system of each video frame is divided into independent video streams.

[0067] If there are pixel points on the coordinate system, the pixel points on the coordinate system are divided into an independent video stream, and if there are no pixel points, no video stream is divided.

[0068] The divided several independent video streams are numbered, and the distribution mapping relationship data of each independent video stream signal and the high-definition video signal is generated, the distribution mapping relationship data is added at the end of the numbered video stream data, and the video stream data is compressed by the codec and sent to the central switch.

[0069] In one embodiment of the present application, the video stream distribution module receives the video stream signal of each high-definition video signal and converts it into an optical signal, including the following steps:

[0070] Receiving the video stream signal and the distribution mapping relationship data of each high-definition video signal through the central switch;

[0071] The video stream signal and the distribution mapping relationship data are converted into an optical signal by the modulator.

[0072] In one embodiment of the present application, the optical fibers of the optical fiber network are encoded, the video stream signal of the same high-definition video signal is distributed to the optical fibers for transmission according to the signal transmission performance of the video transmission node, and the optical fiber distribution data of the video stream is sent to the video transmission node, including the following steps:

[0073] The video transmission nodes are numbered, and the optical fibers of the optical fiber network are encoded according to the video transmission nodes connected by the optical fibers of the optical fiber network.

[0074] According to the video receiving node of the high-definition video signal, the number of the video transmission node connected with the video receiving node is acquired, the video transmission node is screened as the receiving party according to the signal transmission performance of the video transmission node, if no qualified transmission node is screened, the video receiving node error information is sent out;

[0075] The coding data of the optical fiber connected with the video transmission node screened as the receiving party is acquired, and the data request coding is generated, the video stream signal of the same high-definition video signal is randomly distributed to the optical fiber for transmission, and the optical fiber distribution data of the video stream and the data request coding are sent to the video transmission node.

[0076] In one embodiment of the present application, the video transmission node is screened as the receiving party according to the signal transmission performance of the video transmission node, comprising the following steps:

[0077] According to the signal transmission performance of the video transmission node, the video transmission node is sorted from high to low, and the video transmission node with signal transmission performance greater than a preset threshold is screened as the receiving party;

[0078] If the signal transmission performance of the video transmission node is not evaluated, the video transmission node is added to the receiving party;

[0079] If two or more video transmission nodes are not screened, the video transmission node with signal transmission performance not equal to zero and the video transmission node with high sorting are added to the receiving party, if no video transmission node is screened, the screening is stopped.

[0080] Specifically, in the embodiment, according to the signal transmission performance of the video transmission node, the video transmission node is sorted from high to low, and the video transmission node with signal transmission performance greater than a preset threshold is screened as the receiving party; the mean value and the minimum value of the evaluation value of the signal transmission performance of the video transmission node are obtained by statistically evaluating the signal transmission performance of each normal running video transmission node, the average value of the mean value and the minimum value of the evaluation value of the signal transmission performance is calculated, and the last obtained average value is used as the preset threshold of the signal transmission performance.

[0081] In one embodiment of the present application, the video transmission node comprises:

[0082] The video signal integration module: according to the number of the distribution optical fiber in the video stream optical fiber distribution data of the high-definition video signal, the data request coding acquired is sent to the video transmission node corresponding to the distribution optical fiber, the video stream data of the same high-definition video signal is acquired from the video transmission node corresponding to the distribution optical fiber, and the video stream of the same high-definition video signal is integrated and distributed to the corresponding transmission optical fiber according to the video receiving node set by the high-definition video signal.

[0083] WDM wave division multiplexing module: the same high-definition video signal of the video signal integration module is integrated into the same optical fiber through different wavelengths to transmit the video stream signal;

[0084] Signal monitoring module: the video stream of the video transmission node is detected, and the device state of the video transmission node is monitored in real time through SNMP and the like, the running log of the device is read, the signal transmission performance of the video transmission node is evaluated by acquiring the video stream signal transmission speed, bandwidth utilization and device error times of the video transmission node, and the evaluation data is sent to the center node.

[0085] In one embodiment of the application, the signal monitoring module detects the traffic of the video stream of the video transmission node, and monitors the device state of the video transmission node in real time through SNMP and the like, reads the running log of the device, evaluates the signal transmission performance of the video transmission node by acquiring the video stream signal transmission speed, bandwidth utilization and device error times of the video transmission node, and sends the evaluation data to the center node, comprising the following steps:

[0086] The traffic of the video stream of the video transmission node is detected, and the device state of the video transmission node is monitored in real time through SNMP and the like, the device state including: device temperature and device storage environment temperature;

[0087] The running log of the device is read, and the video stream signal transmission speed, bandwidth utilization and device error times data of the video transmission node in the running log are read;

[0088] If the device temperature, the device storage environment temperature or the device error times are greater than the maximum preset threshold, the signal transmission performance of the corresponding video transmission node is directly assigned as 0, and the signal transmission performance of the video transmission node is not evaluated, otherwise, the signal transmission performance of the video transmission node is evaluated;

[0089] The device state data of the video transmission node, and the video stream signal transmission speed, bandwidth utilization and device error times are acquired, the signal transmission performance of the video transmission node is evaluated, and the evaluation data is sent to the center node.

[0090] In one embodiment of the application, the signal transmission performance of the video transmission node is evaluated by the following formula:

[0091]

[0092] Wherein Y is the evaluation value of the signal transmission performance of the video transmission node, a0 is the safe running temperature of the device of the video transmission node, a iThe detection temperature of the i-th device of the video transmission node, b0 is the environmental temperature for safe operation of the device of the video transmission node, b1 is the detected environmental temperature of the video transmission node, V is the detected video stream signal transmission speed of the video transmission node, f is the detected bandwidth utilization rate of the video transmission node, V0 is the average value of the detected video stream signal transmission speed of all video transmission nodes, c0 is the average value of the error number of all video transmission node devices, and c1 is the error number of the video transmission node device.

[0093] Specifically, in the embodiment, the video transmission nodes are sorted from high to low according to the signal transmission performance of the video transmission nodes, and the video transmission nodes with signal transmission performance greater than a preset threshold are selected as the receiving end; by counting the evaluation values of the signal transmission performance of each normally operating video transmission node, for example, by counting the evaluation values of the signal transmission performance of ten normally operating video transmission nodes as {0.82, 0.9, 1.20, 1.54, 0.93, 1.12, 0.86, 0.73, 1.87, 1.63}, the average value and the minimum value of the evaluation values of the signal transmission performance of the video transmission nodes are obtained, and the average value of the calculated average value and the minimum value of the signal transmission performance evaluation value is 1.16, and the last obtained average value is 0.73, which is taken as the preset threshold of the signal transmission performance as 0.95.

[0094] The above embodiments are only used to illustrate the technical method of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A high-definition video signal transmission system based on optical signals, characterized in that, include: The system includes a central node, an optical fiber network, and video transmission nodes. Several video transmission nodes are configured, and each video transmission node is connected to its two nearest video transmission nodes via an optical fiber in the optical fiber network. All video transmission nodes are connected to the central node via the optical fiber network. The central node includes: Video signal processing module: Divides the input high-definition video signal into several independent video streams, compresses each video stream using a codec, and then sends it to the central switch; Video stream distribution module: It is used to receive video stream signals from various high-definition video signals and convert them into optical signals; it encodes the optical fibers of the optical fiber network, distributes the video stream signals of the same high-definition video signal to the optical fibers for transmission according to the signal transmission performance of the video transmission nodes, and sends the optical fiber distribution data of the video stream to the video transmission nodes. The fiber optic network is used to multiplex optical signals of multiple video streams of different wavelengths for transmission in the same optical fiber. The video transmission node is used to allocate video stream data according to the video stream of the high-definition video signal, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the allocation fiber, integrate and allocate the video stream of the same high-definition video signal to the same fiber for transmission, evaluate the signal transmission performance of the video transmission node, and send the evaluation data to the central node. The video signal processing module divides the input high-definition video signal into several independent video streams, compresses each video stream using a codec, and then sends it to the central switch. This includes the following steps: The received video signal is parsed into video frames, and a coordinate system is established for each video frame, with the midpoint of the length and width of the video frame as the origin of the coordinate system. The pixel information in the first, second, third, and fourth quadrants of the coordinate system of each video frame is divided into independent video streams; If there are pixels in the coordinate system, the pixels in the coordinate system will be divided into an independent video stream; if there are no pixels, the video stream will not be divided. The several independent video streams are numbered, and the allocation mapping relationship data between each independent video stream signal and the high-definition video signal is generated. The allocation mapping relationship data is added to the end of the numbered video stream data, and then compressed by the codec before being sent to the central switch. Encoding the optical fibers of the optical fiber network, allocating the video stream signals of the same high-definition video signal to the optical fibers for transmission according to the signal transmission performance of the video transmission nodes, and sending the fiber allocation data of the video stream to the video transmission nodes, includes the following steps: The video transmission nodes are numbered, and the optical fibers of the optical fiber network are encoded according to the video transmission nodes to which the optical fibers of the optical fiber network are connected. Based on the video receiving node of the high-definition video signal, obtain the video transmission node number connected to the video receiving node, and select the video transmission node as the receiver based on the signal transmission performance of the video transmission node. If no qualified transmission node is selected, send a video receiving node error message. The video transmission node connected to the optical fiber is screened out, and the encoding data of the video transmission node connected to the optical fiber is obtained, and the data request code is generated, the video stream signal of the same high-definition video signal is randomly distributed to the optical fiber for transmission, and the optical fiber distribution data and the data request code of the video stream are sent to the video transmission node; The video transmission node comprises: The video signal integration module: according to the number of the distribution optical fiber in the video stream optical fiber distribution data of the high-definition video signal, the data request code obtained is sent to the video transmission node corresponding to the distribution optical fiber, and the video stream data of the same high-definition video signal is obtained from the video transmission node corresponding to the distribution optical fiber, and the same high-definition video signal is integrated and distributed to the corresponding transmission optical fiber according to the video receiving node set by the high-definition video signal; The WDM wave division multiplexing module: the video stream signal of the same high-definition video signal integrated by the video signal integration module is combined into the same optical fiber through different wavelengths for transmission; The signal monitoring module: the flow of the video stream of the video transmission node is detected, and the device state of the video transmission node is monitored in real time through SNMP and other protocols, the running log of the device is read, the signal transmission performance of the video transmission node is evaluated by obtaining the video stream signal transmission speed, bandwidth utilization and device error number of the video transmission node, and the evaluation data is sent to the center node, including: The flow of the video stream of the video transmission node is detected, and the device state of the video transmission node is monitored in real time through SNMP and other protocols, the device state, including: device temperature and device storage environment temperature; The running log of the device is read, and the video stream signal transmission speed, bandwidth utilization and device error number data of the video transmission node in the running log are read; If the device temperature, the device storage environment temperature or the device error number is greater than the maximum preset threshold, the signal transmission performance of the corresponding video transmission node is directly assigned as 0, and the signal transmission performance of the video transmission node is not evaluated, otherwise, the signal transmission performance of the video transmission node is evaluated; The signal transmission performance of the video transmission node is evaluated by obtaining the device state data, the video stream signal transmission speed, the bandwidth utilization and the device error number of the video transmission node, and the evaluation data is sent to the center node.

2. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that, Also includes: The video receiving node comprises: The signal processing module: receiving the high-definition video signal video stream signal from the optical fiber through the optical detector, and converting it into an electrical signal, and fusing the video stream signal converted into an electrical signal into an original high-definition video signal according to the distribution mapping relationship data; The decoder: decoding and demodulating the electrical signal converted by the signal processing module at the receiving end, and restoring the original high-definition video signal.

3. The high-definition video signal transmission system based on optical signal according to claim 1, characterized in that, The video stream distribution module receives the video stream signal of each high-definition video signal and converts it into an optical signal, comprising the following steps: Receiving the video stream signal of each high-definition video signal and the distribution mapping relationship data through the center switch; The video stream signal and the distribution mapping relationship data are converted into optical signals by the modulator.

4. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that, According to the signal transmission performance of the video transmission node, the video transmission node is screened out as the receiver, comprising the following steps: According to the signal transmission performance of the video transmission node, the video transmission node is ranked from high to low, and the video transmission node with signal transmission performance greater than a preset threshold is screened as a receiver; If the video transmission node has not been evaluated for signal transmission performance, the video transmission node is added to the receiver; If two or more video transmission nodes are not screened, 1-2 video transmission nodes with non-zero signal transmission performance and high ranking are added to the receiver, and if no video transmission node is screened, no further screening is performed.

5. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that, The signal transmission performance of the video transmission node is evaluated by the following formula: Wherein, Y is the evaluation value of the signal transmission performance of the video transmission node, a0 is the safe running temperature of the device of the video transmission node, a i is the detection temperature of the i-th device of the video transmission node, b0 is the safe running environment temperature of the device of the video transmission node, b1 is the detected environment temperature of the video transmission node, V is the video stream signal transmission speed detected by the video transmission node, f is the bandwidth utilization rate detected by the video transmission node, V0 is the average value of the video stream signal transmission speeds detected by all video transmission nodes, c0 is the average value of the device error times of all video transmission nodes, and c1 is the device error times of the video transmission node.

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