High-definition video signal transmission system based on optical signal

Abstract

The invention discloses a high-definition video signal transmission system based on optical signals, relates to the technical field of video signal transmission, and solves the problems that video signals are difficult to reasonably divide, and meanwhile, signal transmission is difficult to manage and distribute in a video stream signal transmission process. And stable and safe transmission of high-definition video signals is inconvenient to guarantee. Comprising a central node, an optical fiber network and a plurality of video transmission nodes, a video signal is divided into a plurality of independent video streams, so that flexible allocation according to network bandwidth and node performance is facilitated, and the overall transmission efficiency is improved; the compressed independent video stream can be transmitted more quickly through a network, so that the waiting time of a data packet is shortened, and the overall delay is reduced; different video streams can be dynamically distributed to different optical fibers according to actual requirements, so that more efficient resource utilization and load balancing are realized.

Description

Technical Field

[0001] The invention belongs to the field of video signal transmission, and in particular is a high-definition video signal transmission system based on optical signals. Background Art

[0002] With the rapid development of digitalization and network technology, the demand for high-definition video content in daily life and various applications is increasing, including video surveillance, telemedicine, online education, virtual meetings, etc. These applications have put forward higher requirements for the quality, speed and stability of video transmission. The traditional copper cable transmission method has certain limitations in bandwidth, distance and anti-interference ability, and it is difficult to meet the needs of high-volume and high-speed transmission of high-definition video signals. 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, the video signal transmission system based on optical signals has gradually received attention, providing an effective and reliable transmission solution 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 codecs and then transmits data in the form of optical signals at a high rate and large capacity.

[0003] Most of the existing high-definition video signal transmission systems directly convert video signals into optical signals for transmission through optical fibers, which makes it difficult to reasonably divide video signals. At the same time, when directly transmitting video signals through optical fibers, there is a lack of video transmission node settings, making it difficult to manage and distribute signal transmission during video stream signal transmission, and it is not convenient to ensure stable and secure transmission of high-definition video signals. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a high-definition video signal transmission system based on optical signals, which is used to solve the technical problems that it is difficult to reasonably divide video signals, and at the same time, it is difficult to manage and distribute signal transmission during video stream signal transmission, which is not convenient for ensuring stable and safe transmission of high-definition video signals.

[0005] To solve the above problems, the first aspect of the present invention provides a high-definition video signal transmission system based on optical signals, comprising: a central node, an optical fiber network and video transmission nodes, wherein a plurality of video transmission nodes are provided, each of the video transmission nodes is connected to the two video transmission nodes closest to it through an optical fiber of the optical fiber network, and all the video transmission nodes are connected to the central node through the optical fiber network; The central node comprises: Video signal processing module: divides the input high-definition video signal into several independent video streams, compresses each video stream through the codec and sends it to the central switch; Video stream distribution module: used to receive the video stream signals of each high-definition video signal and convert them into optical signals; encode the optical fiber of the optical fiber network, distribute the video stream signals of the same high-definition video signal to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and send the optical fiber distribution data of the video stream to the video transmission node; The optical fiber network is used to multiplex optical signals of multiple video streams with different wavelengths for transmission in the same optical fiber; The video transmission node is used to distribute data of the video stream optical fiber of the high-definition video signal according to the video stream, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the distribution optical fiber, and integrate and distribute the video stream of the same high-definition video signal to the same optical fiber for transmission. At the same time, the signal transmission performance of the video transmission node is evaluated, and the evaluation data is sent to the central node.

[0006] As a further solution of the present invention: also include: Video receiving node, including: Signal processing module: receives the video stream signal of the high-definition video signal from the optical fiber through the optical detector, converts it into an electrical signal, and fuses the video stream signal converted into the electrical signal into the original high-definition video signal according to the allocation mapping relationship data; Decoder: At the receiving end, decodes and demodulates the electrical signal converted by the signal processing module to restore the original high-definition video signal.

[0007] As a further solution of the present invention: 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 it to the central switch, including the following steps: Parse the received video signal into video frames, establish a coordinate system in each video frame, and take the midpoint of the length and width of the video frame as the origin of the coordinate system; 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; If there are pixels on the coordinate system, the pixels on the coordinate system are divided into an independent video stream. If there are no pixels, the video stream is not divided. The divided 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 is compressed by the codec and sent to the central switch.

[0008] As a further solution of the present invention: the video stream distribution module receives the video stream signals of each high-definition video signal and converts them into optical signals, including the following steps: Receive video stream signals and distribution mapping relationship data of each high-definition video signal through a central switch; The video stream signal and the distribution mapping relationship data are converted into an optical signal through a modulator.

[0009] As a further solution of the present invention: encoding the optical fiber of the optical fiber network, distributing the video stream signal of the same high-definition video signal to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and sending the optical fiber distribution data of the video stream to the video transmission node, including the following steps: Numbering the video transmission nodes, encoding the optical fibers of the optical fiber network according to the video transmission nodes to which the optical fibers of the optical fiber network are connected; According to the video receiving node of the high-definition video signal, the video transmission node number to which the video receiving node is connected is obtained, and according to the signal transmission performance of the video transmission node, the video transmission node is selected as the receiver. If no qualified transmission node is selected, an error message of the video receiving node is issued; Obtain the coded data of the optical fiber connected to the filtered receiving video transmission node, generate a data request code, randomly distribute the video stream signal of the same high-definition video signal to the optical fiber for transmission, and send the optical fiber distribution data and data request code of the video stream to the video transmission node.

[0010] As a further solution of the present invention: selecting a video transmission node as a receiver according to the signal transmission performance of the video transmission node includes the following steps: According to the signal transmission performance of the video transmission nodes, the video transmission nodes are sorted from high to low, and the video transmission nodes whose signal transmission performance is greater than a preset threshold are selected as receivers; 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, the screening signal transmission performance is not zero, and the top 1 to 2 video transmission nodes are added to the receiver. If no video transmission node is screened, no further screening is performed.

[0011] As a further solution of the present invention: a video transmission node includes: Video signal integration module: according to the number of the allocated optical fiber in the video stream optical fiber allocation data of the high-definition video signal, send the acquired data request code to the video transmission node corresponding to the allocated optical fiber, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the allocated optical fiber, and according to the video receiving node set for the high-definition video signal, integrate and allocate the video stream of the same high-definition video signal to the corresponding transmission optical fiber; WDM wavelength division multiplexing module: combines the video stream signals of the same high-definition video signal integrated by the video signal integration module into the same optical fiber through different wavelengths for transmission; Signal monitoring module: performs traffic detection on the video stream of the video transmission node, and monitors the device status of the video transmission node in real time through protocols such as SNMP, reads the operation log of the device, and evaluates the signal transmission performance of the video transmission node by obtaining the video stream signal transmission speed, bandwidth utilization and number of device errors of the video transmission node, and sends the evaluation data to the central node.

[0012] As a further solution of the present invention: the signal monitoring module performs flow detection on the video stream of the video transmission node, and monitors the device status of the video transmission node in real time through protocols such as SNMP, reads the operation log of the device, obtains the video stream signal transmission speed, bandwidth utilization and number of device errors of the video transmission node, evaluates the signal transmission performance of the video transmission node, and sends the evaluation data to the central node, including the following steps: Perform traffic detection on the video stream of the video transmission node, and monitor the device status of the video transmission node in real time through protocols such as SNMP, including: device temperature and device storage environment temperature; Read the operation log of the device, and read the video stream signal transmission speed, bandwidth utilization and device error number data of the video transmission node in the operation log; If the device temperature, the device storage environment temperature or the number of device errors is greater than the maximum preset threshold, the signal transmission performance of the corresponding video transmission node is directly assigned a value of 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; By acquiring the device status data of the video transmission node, as well as the video stream signal transmission speed, bandwidth utilization and number of device errors, the signal transmission performance of the video transmission node is evaluated and the evaluation data is sent to the central node.

[0013] As a further solution of the present invention: the signal transmission performance of the video transmission node is evaluated by the following formula: Where Y is the evaluation value of the signal transmission performance of the video transmission node, a0 is the safe operating temperature of the device of the video transmission node, and ai is the detected temperature of the i-th device of the video transmission node, b0 is the ambient temperature of the equipment of the video transmission node for safe operation, b1 is the ambient temperature detected by the video transmission node, V is the video stream signal transmission speed detected by the video transmission node, f is the bandwidth utilization detected by the video transmission node, V0 is the mean of the video stream signal transmission speed detected by all video transmission nodes, c0 is the mean of the number of error reports of all video transmission node devices, and c1 is the number of error reports of video transmission node devices.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention divides the input high-definition video signal into several independent video streams by setting a video signal processing module of the central node, and compresses each video stream through a codec and then sends it to the central switch; the video signal is divided into multiple independent video streams, which can be flexibly allocated according to 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, thereby reducing the overall delay.

[0015] The present invention divides the video signal into multiple independent video streams, which is convenient for flexible allocation according to network bandwidth and node performance, thereby improving the overall transmission efficiency; the compressed independent video streams can be transmitted through the network faster, reducing the waiting time of data packets, thereby reducing the overall delay; different video streams can be dynamically allocated to different optical fibers according to actual needs, thereby achieving more efficient resource utilization and load balancing; if an optical fiber fails, other video streams can still continue to be transmitted, and the corresponding video stream can be re-extracted and re-transmitted, avoiding the retransmission of the entire video signal, thereby improving the fault tolerance and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the system framework of the present invention; Figure 2 It is a schematic diagram of the framework of the video transmission node of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 2 , the first aspect of the present invention provides a high-definition video signal transmission system based on optical signals, comprising: a central node, an optical fiber network and a video transmission node, all video transmission nodes are provided with a plurality of nodes, each of the video transmission nodes is connected to the 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; The central node comprises: Video signal processing module: divides the input high-definition video signal into several independent video streams, compresses each video stream through the codec and sends it to the central switch; Video stream distribution module: used to receive the video stream signals of each high-definition video signal and convert them into optical signals; encode the optical fiber of the optical fiber network, distribute the video stream signals of the same high-definition video signal to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and send the optical fiber distribution data of the video stream to the video transmission node; The optical fiber network is used to multiplex optical signals of multiple video streams with different wavelengths for transmission in the same optical fiber; The video transmission node is used to distribute data of the video stream optical fiber of the high-definition video signal according to the video stream, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the distribution optical fiber, and integrate and distribute the video stream of the same high-definition video signal to the same optical fiber for transmission. At the same time, the signal transmission performance of the video transmission node is evaluated, and the evaluation data is sent to the central node.

[0020] Specifically, in this embodiment, all video transmission nodes are connected to the two video transmission nodes closest to them through the 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 the designated video transmission node through mutual transmission between the video transmission nodes.

[0021] By setting up a video signal processing module at the central node, the input high-definition video signal is divided into several independent video streams, and each video stream is compressed by a codec and sent to the central switch. The video signal is divided into multiple independent video streams, which can be flexibly allocated according to network bandwidth and node performance to improve overall transmission efficiency. The divided and compressed video streams can be transmitted faster through the network, reducing the waiting time of data packets, thereby reducing overall latency.

[0022] 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 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; Dividing the video signal into multiple independent video streams facilitates flexible allocation according to network bandwidth and node performance, thereby improving overall transmission efficiency. Compressed independent video streams can be transmitted faster through the network, reducing the waiting time of data packets, thereby reducing overall latency. Different video streams can be dynamically allocated to different optical fibers according to actual needs, achieving more efficient resource utilization and load balancing; if a certain optical fiber fails, other video streams can still continue to be transmitted, and the corresponding video stream can be re-extracted and re-transmitted, avoiding the entire video signal from being re-transmitted, thereby improving the system's fault tolerance and reliability. Allocating video streams to different optical fibers for transmission can reasonably allocate bandwidth resources according to the transmission performance of each optical fiber and the transmission requirements of the video stream, which helps to optimize resource utilization, avoid bandwidth waste, improve the overall performance of the system, and also improve the security of the entire video signal transmission.

[0023] In one embodiment of the present invention, it also includes: Video receiving node, including: Signal processing module: receives the video stream signal of the high-definition video signal from the optical fiber through the optical detector, converts it into an electrical signal, and fuses the video stream signal converted into the electrical signal into the original high-definition video signal according to the allocation mapping relationship data; Decoder: At the receiving end, decodes and demodulates the electrical signal converted by the signal processing module to restore the original high-definition video signal.

[0024] In one embodiment of the present invention, the video signal processing module divides the input high-definition video signal into a plurality of independent video streams, compresses each video stream through a codec and sends it to a central switch, including the following steps: Parse the received video signal into video frames, establish a coordinate system in each video frame, and take the midpoint of the length and width of the video frame as the origin of the coordinate system; 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; If there are pixels on the coordinate system, the pixels on the coordinate system are divided into an independent video stream. If there are no pixels, the video stream is not divided. The divided 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 is compressed by the codec and sent to the central switch.

[0025] In one embodiment of the present invention, the video stream distribution module receives the video stream signals of each high-definition video signal and converts them into optical signals, including the following steps: Receive video stream signals and distribution mapping relationship data of each high-definition video signal through a central switch; The video stream signal and the distribution mapping relationship data are converted into an optical signal through a modulator.

[0026] In one embodiment of the present invention, encoding the optical fiber of the optical fiber network, distributing the video stream signal of the same high-definition video signal to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and sending the optical fiber distribution data of the video stream to the video transmission node, including the following steps: Numbering the video transmission nodes, encoding the optical fibers of the optical fiber network according to the video transmission nodes to which the optical fibers of the optical fiber network are connected; According to the video receiving node of the high-definition video signal, the video transmission node number to which the video receiving node is connected is obtained, and according to the signal transmission performance of the video transmission node, the video transmission node is selected as the receiver. If no qualified transmission node is selected, an error message of the video receiving node is issued; Obtain the coded data of the optical fiber connected to the filtered receiving video transmission node, generate a data request code, randomly distribute the video stream signal of the same high-definition video signal to the optical fiber for transmission, and send the optical fiber distribution data and data request code of the video stream to the video transmission node.

[0027] In one embodiment of the present invention, selecting a video transmission node as a receiver according to the signal transmission performance of the video transmission node includes the following steps: According to the signal transmission performance of the video transmission nodes, the video transmission nodes are sorted from high to low, and the video transmission nodes whose signal transmission performance is greater than a preset threshold are selected as receivers; 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, the screening signal transmission performance is not zero, and the top 1 to 2 video transmission nodes are added to the receiver. If no video transmission node is screened, no further screening is performed.

[0028] Specifically, in this embodiment, the video transmission nodes are sorted from high to low according to their signal transmission performance, and the video transmission nodes with signal transmission performance greater than a preset threshold are selected as receivers; the evaluation values ​​of the signal transmission performance of each normally operating video transmission node are counted to obtain the mean and minimum values ​​of the evaluation values ​​of the signal transmission performance of the video transmission nodes, and the average value of the mean and minimum values ​​of the evaluation values ​​of the signal transmission performance are calculated, and the finally obtained average value is used as the preset threshold of the signal transmission performance.

[0029] In one embodiment of the present invention, a video transmission node includes: Video signal integration module: according to the number of the allocated optical fiber in the video stream optical fiber allocation data of the high-definition video signal, send the acquired data request code to the video transmission node corresponding to the allocated optical fiber, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the allocated optical fiber, and according to the video receiving node set for the high-definition video signal, integrate and allocate the video stream of the same high-definition video signal to the corresponding transmission optical fiber; WDM wavelength division multiplexing module: combines the video stream signals of the same high-definition video signal integrated by the video signal integration module into the same optical fiber through different wavelengths for transmission; Signal monitoring module: performs traffic detection on the video stream of the video transmission node, and monitors the device status of the video transmission node in real time through protocols such as SNMP, reads the operation log of the device, and evaluates the signal transmission performance of the video transmission node by obtaining the video stream signal transmission speed, bandwidth utilization and number of device errors of the video transmission node, and sends the evaluation data to the central node.

[0030] In one embodiment of the present invention, the signal monitoring module performs flow detection on the video stream of the video transmission node, and monitors the device status of the video transmission node in real time through protocols such as SNMP, reads the operation log of the device, obtains the video stream signal transmission speed, bandwidth utilization and number of device errors of the video transmission node, evaluates the signal transmission performance of the video transmission node, and sends the evaluation data to the central node, including the following steps: Perform traffic detection on the video stream of the video transmission node, and monitor the device status of the video transmission node in real time through protocols such as SNMP, including: device temperature and device storage environment temperature; Read the operation log of the device, and read the video stream signal transmission speed, bandwidth utilization and device error number data of the video transmission node in the operation log; If the device temperature, the device storage environment temperature or the number of device errors is greater than the maximum preset threshold, the signal transmission performance of the corresponding video transmission node is directly assigned a value of 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; By acquiring the device status data of the video transmission node, as well as the video stream signal transmission speed, bandwidth utilization and number of device errors, the signal transmission performance of the video transmission node is evaluated and the evaluation data is sent to the central node.

[0031] In one embodiment of the present invention, the signal transmission performance of the video transmission node is evaluated by the following formula: Where Y is the evaluation value of the signal transmission performance of the video transmission node, a0 is the safe operating temperature of the device of the video transmission node, and a i is the detected temperature of the i-th device of the video transmission node, b0 is the ambient temperature of the equipment of the video transmission node for safe operation, b1 is the ambient temperature detected by the video transmission node, V is the video stream signal transmission speed detected by the video transmission node, f is the bandwidth utilization detected by the video transmission node, V0 is the mean of the video stream signal transmission speed detected by all video transmission nodes, c0 is the mean of the number of error reports of all video transmission node devices, and c1 is the number of error reports of video transmission node devices.

[0032] Specifically, in this embodiment, the video transmission nodes are sorted from high to low according to their signal transmission performance, and the video transmission nodes with signal transmission performance greater than a preset threshold are selected as receivers; 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, respectively: {0.82, 0.9, 1.20, 1.54, 0.93, 1.12, 0.86, 0.73, 1.87, 1.63}, the mean and minimum values ​​of the evaluation values ​​of the signal transmission performance of the video transmission nodes are obtained, and the average value of the mean and minimum values ​​of the evaluation values ​​of the signal transmission performance is 1.16. The final average value is 0.73, which is used as the preset threshold of the signal transmission performance of 0.95.

[0033] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A high-definition video signal transmission system based on optical signals, characterized in that: include: A central node, an optical fiber network and a video transmission node, wherein a plurality of video transmission nodes are provided, each of the video transmission nodes is connected to the two nearest video transmission nodes via an optical fiber of the optical fiber network, and all the video transmission nodes are connected to the central node via the optical fiber network; The central node comprises: Video signal processing module: divides the input high-definition video signal into several independent video streams, compresses each video stream through the codec and sends it to the central switch; Video stream distribution module: used to receive the video stream signals of each high-definition video signal and convert them into optical signals; encode the optical fiber of the optical fiber network, distribute the video stream signals of the same high-definition video signal to the optical fiber for transmission according to the signal transmission performance of the video transmission node, and send the optical fiber distribution data of the video stream to the video transmission node; The optical fiber network is used to multiplex optical signals of multiple video streams with different wavelengths for transmission in the same optical fiber; The video transmission node is used to distribute data of the video stream optical fiber of the high-definition video signal according to the video stream, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the distribution optical fiber, and integrate and distribute the video stream of the same high-definition video signal to the same optical fiber for transmission. At the same time, the signal transmission performance of the video transmission node is evaluated, and the evaluation data is sent to the central node.

2. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that: Also includes: Video receiving node, including: Signal processing module: receives the video stream signal of the high-definition video signal from the optical fiber through the optical detector, converts it into an electrical signal, and fuses the video stream signal converted into the electrical signal into the original high-definition video signal according to the allocation mapping relationship data; Decoder: At the receiving end, decodes and demodulates the electrical signal converted by the signal processing module to restore the original high-definition video signal.

3. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that: 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 it to the central switch, including the following steps: Parse the received video signal into video frames, establish a coordinate system in each video frame, and take the midpoint of the length and width of the video frame as the origin of the coordinate system; 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; If there are pixels on the coordinate system, the pixels on the coordinate system are divided into an independent video stream. If there are no pixels, the video stream is not divided. The divided 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 is compressed by the codec and sent to the central switch.

4. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that: The video stream distribution module receives the video stream signals of each high-definition video signal and converts them into optical signals, including the following steps: Receive video stream signals and distribution mapping relationship data of each high-definition video signal through a central switch; The video stream signal and the distribution mapping relationship data are converted into an optical signal through a modulator.

5. The high-definition video signal transmission system based on optical signals according to claim 2, characterized in that: The optical fiber of the optical fiber network is encoded, and according to the signal transmission performance of the video transmission node, the video stream signal of the same high-definition video signal is distributed to the optical fiber for transmission, and the optical fiber distribution data of the video stream is sent to the video transmission node, including the following steps: Numbering the video transmission nodes, encoding the optical fibers of the optical fiber network according to the video transmission nodes to which the optical fibers of the optical fiber network are connected; According to the video receiving node of the high-definition video signal, the video transmission node number to which the video receiving node is connected is obtained, and according to the signal transmission performance of the video transmission node, the video transmission node is selected as the receiver. If no qualified transmission node is selected, an error message of the video receiving node is issued; Obtain the coded data of the optical fiber connected to the filtered receiving video transmission node, generate a data request code, randomly distribute the video stream signal of the same high-definition video signal to the optical fiber for transmission, and send the optical fiber distribution data and data request code of the video stream to the video transmission node.

6. The high-definition video signal transmission system based on optical signals according to claim 5, characterized in that: The video transmission node is selected as a receiver according to the signal transmission performance of the video transmission node, including the following steps: According to the signal transmission performance of the video transmission nodes, the video transmission nodes are sorted from high to low, and the video transmission nodes whose signal transmission performance is greater than a preset threshold are selected as receivers; 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, the screening signal transmission performance is not zero, and the top 1 to 2 video transmission nodes are added to the receiver. If no video transmission node is screened, no further screening is performed.

7. The high-definition video signal transmission system based on optical signals according to claim 1, characterized in that: Video transmission node, including: Video signal integration module: according to the number of the allocated optical fiber in the video stream optical fiber allocation data of the high-definition video signal, send the acquired data request code to the video transmission node corresponding to the allocated optical fiber, obtain the video stream data of the same high-definition video signal from the video transmission node corresponding to the allocated optical fiber, and according to the video receiving node set for the high-definition video signal, integrate and allocate the video stream of the same high-definition video signal to the corresponding transmission optical fiber; WDM wavelength division multiplexing module: combines the video stream signals of the same high-definition video signal integrated by the video signal integration module into the same optical fiber through different wavelengths for transmission; Signal monitoring module: performs traffic detection on the video stream of the video transmission node, and monitors the device status of the video transmission node in real time through protocols such as SNMP, reads the operation log of the device, and evaluates the signal transmission performance of the video transmission node by obtaining the video stream signal transmission speed, bandwidth utilization and number of device errors of the video transmission node, and sends the evaluation data to the central node.

8. The high-definition video signal transmission system based on optical signals according to claim 7, characterized in that: The signal monitoring module performs flow detection on the video stream of the video transmission node, and monitors the device status of the video transmission node in real time through protocols such as SNMP, reads the operation log of the device, evaluates the signal transmission performance of the video transmission node by obtaining the video stream signal transmission speed, bandwidth utilization and number of device errors of the video transmission node, and sends the evaluation data to the central node, including the following steps: Perform traffic detection on the video stream of the video transmission node, and monitor the device status of the video transmission node in real time through protocols such as SNMP, including: device temperature and device storage environment temperature; Read the operation log of the device, and read the video stream signal transmission speed, bandwidth utilization and device error number data of the video transmission node in the operation log; If the device temperature, the device storage environment temperature or the number of device errors is greater than the maximum preset threshold, the signal transmission performance of the corresponding video transmission node is directly assigned a value of 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; By acquiring the device status data of the video transmission node, as well as the video stream signal transmission speed, bandwidth utilization and number of device errors, the signal transmission performance of the video transmission node is evaluated and the evaluation data is sent to the central node.

9. The high-definition video signal transmission system based on optical signals according to claim 8, characterized in that: The signal transmission performance of the video transmission node is evaluated using the following formula: Where Y is the evaluation value of the signal transmission performance of the video transmission node, a0 is the safe operating temperature of the device of the video transmission node, and a i is the detected temperature of the i-th device of the video transmission node, b0 is the ambient temperature of the equipment of the video transmission node for safe operation, b1 is the ambient temperature detected by the video transmission node, V is the video stream signal transmission speed detected by the video transmission node, f is the bandwidth utilization detected by the video transmission node, V0 is the mean of the video stream signal transmission speed detected by all video transmission nodes, c0 is the mean of the number of error reports of all video transmission node devices, and c1 is the number of error reports of video transmission node devices.

Images