Real-time Display System and Measurement Method for Long-distance Transmission of PAL, HD-SDI and Cameralink Videos

Abstract

The present invention relates to a real-time display system and measurement method for long-distance transmission of PAL, HD-SDI and CameraLink videos; the system solves the problems in the prior art of short transmission distance when directly transmitting video images via video cables, and video image lag when transmitting video over long distances via optical fiber systems; the working principle is that a first multifunctional real-time video acquisition and display module receives a differential synchronization signal from a timing terminal, and sends the received differential synchronization signal to a video camera in real time via an optical terminal module; after receiving the differential synchronization signal, the video camera sends a video signal in real time, and sends it to the first multifunctional real-time video acquisition and display module in real time via the optical terminal module for real-time data acquisition; the first multifunctional real-time video acquisition and display module performs real-time format conversion and re-encoding on the received video signal, and sends it to a display for real-time display; the present invention also proposes a real-time measurement method for long-distance transmission of PAL, HD-SDI and CameraLink interface videos.

Description

Technical Field

[0001] The present invention relates to a long-distance video transmission method, in particular to a real-time display system for long-distance transmission of PAL, HD-SDI and cameralink interface videos and a real-time measurement method thereof. Background Art

[0002] In the field of precise measurement and tracking in industry and shooting ranges, long-distance real-time transmission of video images is required. The transmission distance is usually several kilometers to tens of kilometers. In the existing technology, video images are directly transmitted through video cables, and the transmission distance is only tens of meters, which cannot meet the requirements of long-distance transmission. In industry, long-distance video transmission through optical fiber systems often causes video image jamming, video image blocking, and excessive image output delay, and it is impossible to transmit video images over long distances in real time. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the prior art of directly transmitting video images through video cables, such as short transmission distance, and long-distance video transmission through optical fiber systems, which may cause video image lag, video image blockage, and excessive video image transmission time delay, as well as the technical problem of being unable to achieve long-distance real-time transmission. The present invention provides a real-time display system and measurement method for long-distance transmission of PAL, HD-SDI and CameraLink videos.

[0004] The technical solution adopted in the present invention is:

[0005] A real-time display system for long-distance transmission of PAL, HD-SDI and cameralink videos, which is special in that it includes an optical terminal module and a first multifunctional real-time video acquisition and display module;

[0006] The optical terminal module includes a far-end transmitting end and a near-end receiving end connected by optical fiber;

[0007] The signal receiving end of the first multifunctional real-time video acquisition and display module is used to receive the differential synchronization signal sent by the time system terminal, the signal transmitting end of the first multifunctional real-time video acquisition and display module is serially connected to the near-end receiving end of the optical terminal module, the far-end transmitting end serial port of the optical terminal module is used to connect to the signal receiving end of the video camera, the far-end transmitting end of the optical terminal module is connected to the video output end of the video camera, and the near-end receiving end of the optical terminal module is connected to the video input end of the first multifunctional real-time video acquisition and display module;

[0008] The first multifunctional real-time video acquisition and display module receives the differential synchronization signal sent by the timing terminal, and sends the received differential synchronization signal to the video camera in real time through the near-end receiving end serial port of the optical terminal module, the optical fiber and the far-end sending end serial port of the optical terminal module. After receiving the differential synchronization signal, the video camera sends a video signal in real time, and sends it to the first multifunctional real-time video acquisition and display module in real time through the far-end transmitting end of the optical terminal module, the optical fiber and the near-end receiving end of the optical terminal module for real-time data acquisition; the first multifunctional real-time video acquisition and display module performs real-time format conversion and re-encoding on the received video signal, and sends it to the display for real-time display.

[0009] Furthermore, it also includes a second multifunctional real-time video acquisition and display module, a first image storage module and a second image storage module for performing real-time measurement;

[0010] The signal receiving end of the second multifunctional real-time video acquisition and display module is used to receive the differential synchronization signal sent by the time system terminal, the second multifunctional real-time video acquisition and display module is connected to the first image storage module, and the video output end of the second multifunctional real-time video acquisition and display module is connected to the remote transmitting end of the optical terminal module; the second image storage module is connected to the first multifunctional real-time video acquisition and display module, and is used to receive the video image sent by the first multifunctional real-time video acquisition and display module;

[0011] After receiving the differential synchronization signal, the second multifunctional real-time video acquisition and display module cyclically sends out multiple continuous grayscale video images, and after real-time encoding, sends them to the first image storage module for storage. It generates a video signal after real-time format conversion and encoding, and sends the video signal to the first multifunctional real-time video acquisition and display module in real time through the far-end transmitting end of the optical terminal module, the optical fiber and the near-end receiving end of the optical terminal module. The first multifunctional real-time video acquisition and display module generates a video image after real-time format conversion and encoding the received video signal, and sends it to the second image storage module for storage in real time.

[0012] Furthermore, it also includes a multifunctional video tracker;

[0013] The multifunctional video tracker is connected to the first multifunctional real-time video acquisition and display module and realizes mutual communication;

[0014] The first multifunctional real-time video acquisition and display module performs real-time format conversion and encoding on the received video signal, and then sends it to the multifunctional video tracker in real time for target tracking, while using ping-pong cache for real-time storage; the multifunctional video tracker extracts information from the received video signal and sends it to the first multifunctional real-time video acquisition and display module to generate character information; the first multifunctional real-time video acquisition and display module reads the stored video signal in real time, and after real-time format conversion, character information superposition and re-encoding, sends it to the display for real-time display.

[0015] The extracted information includes the miss distance and time; the character superimposed information includes the miss distance, time and the target wave gate and crosshairs of the multifunctional video tracker.

[0016] Furthermore, the second multifunctional real-time video acquisition and display module includes a second encoding unit, a second external synchronization signal input unit, and a second FPGA main chip;

[0017] The second encoding unit includes a fourth encoding chip group having one end connected to the second FPGA main chip and one end connected to the remote transmitting end of the optical terminal module, and a fifth encoding chip group having one end connected to the second FPGA main chip and one end connected to the first image storage module;

[0018] The input end of the second external synchronization signal input unit is connected to the time synchronization terminal, and the output end is connected to the second FPGA main chip, and is used to receive the 1Hz and 10MHz differential signals sent by the time synchronization terminal;

[0019] The second external synchronization signal input unit transmits the 1Hz and 10MHz differential signals received from the timing terminal to the second FPGA main chip. The second FPGA main chip generates multiple continuous video images in a camera mode cycle. After real-time format conversion, one channel generates a video signal and sends it to the fourth encoding chip group. The fourth encoding chip group encodes the received video signal and sends it to the remote sending end; the other channel is sent to the fifth encoding chip group for real-time encoding, and then generates a video image signal and sends it to the first image storage module for storage.

[0020] Furthermore, the first multifunctional real-time video acquisition and display module includes a first decoding unit, a first encoding unit, an external synchronization unit, a storage unit, a first FPGA main chip and a communication unit;

[0021] The storage unit includes two storage chips connected to the first FPGA main chip, and the two storage chips form a ping-pong storage structure;

[0022] The external synchronization unit includes a first external synchronization signal input unit whose input end is connected to the receiving terminal and whose output end is connected to the first FPGA main chip, and a synchronization generator whose input end is connected to the first FPGA main chip and whose output end is connected to the serial port of the near-end receiving end;

[0023] The first decoding unit includes at least one decoding chip selected from the group consisting of a PAL decoding chip, a high-definition video decoding chip, and a Cameralink decoding chip, the input ends of which are respectively connected to the proximal receiving end, and the output ends of which are respectively connected to the first FPGA main chip; and the number of each decoding chip is at least one;

[0024] The first encoding unit includes a first encoding chipset connected to the first FPGA main chip at its input end and connected to the multifunctional video tracker at its output end, a second encoding chipset connected to the first FPGA main chip at its input end and connected to the display at its output end, and a third encoding chipset connected to the first FPGA main chip at its input end and connected to the second image storage module at its output end.

[0025] The communication unit includes a serial communication chip LTC2850, a serial communication chip MAX232 and a network communication chip 88E1111 respectively connected to the first FPGA main chip at one end and the multifunctional video tracker at the other end;

[0026] The first external synchronization signal input unit sends the 1Hz and 10MHz differential signals sent by the received time system terminal to the synchronization generator through the first FPGA main chip. The synchronization generator processes the received differential signal to generate LVDS differential signal and RS485 level differential signal, and sends it to the near-end receiving end serial port. The near-end receiving end serial port passes through the optical fiber and the remote transmitting end serial port in turn and then sends it to the video camera. After receiving the differential signal, the video camera sends a video signal and sends it to the first decoding unit in real time through the remote transmitting end, optical fiber and near-end receiving end in turn. After the first decoding unit decodes the received video signal in real time, it uses the first FPGA main chip to store and read it in real time using the ping-pong cache method, and sends it after real-time format conversion. The first encoding chipset is encoded and sent to the multifunctional video tracker in real time. The multifunctional video tracker extracts information from the received video signal and sends it to the first FPGA main chip through the network port communication chip 88E1111. The first FPGA main chip generates character information in real time from the received extracted information, and then converts the real-time read video signal into another channel and superimposes the character information on it before sending it to the second encoding chipset. The second encoding chipset encodes the received video signal in real time and sends it to the display for real-time display. Alternatively, the first FPGA main chip converts the received video signal into a real-time format to generate a video image signal, and after real-time encoding through the third encoding chipset, sends it to the second image storage module for storage.

[0027] Furthermore, the multifunctional target tracker includes a third FPGA main chip, a DSP chip TMS320C6455, a first power chip TPS65265 connected to the third FPGA main chip, a configuration chip EPCS128, a serial port chip SN65HVD77DR, two FPGA memory chips; a second power chip TPS65265 and a FLASH chip MT28EW128 connected to the DSP chip TMS320C6455; the third FPGA main chip and the DSP chip TMS320C6455 are connected through the EMIF bus. The FLASH chip MT28EW128 and the DSP chip TMS320C6455 are connected in two-way communication. The configuration chip EPCS128, the serial port chip SN65HVD77DR and the two FPGA memory chips are in two-way communication with the third FPGA main chip. The two FPGA memory chips form a ping-pong storage structure. The third FPGA main chip is connected to the first encoding chipset. The serial port chip SN65HVD77DR is connected to the serial communication chip LTC2850, the serial communication chip MAX232 and the network communication chip 88E1111.

[0028] The video signal emitted by the first encoding chipset is stored in real time in a ping-pong storage structure through the third FPGA main chip using a ping-pong cache method. The DSP chip TMS320C6455 reads and extracts information from the ping-pong storage structure in real time through the EMIF bus, and sends the extracted information to the first FPGA main chip in sequence through the EMIF bus, the third FPGA main chip, and the network port communication chip 88E1111.

[0029] Furthermore, the remote transmitting end converts the received video signal into an optical fiber signal in real time, transmits the signal through optical fiber, and converts the optical fiber signal into a video signal in real time at the near receiving end;

[0030] The optical terminal module is at least one of a PAL video optical terminal, an HD-SDI video optical terminal, and a cameralink video optical terminal, and the number of each type of optical terminal is at least one;

[0031] The near-end receiving serial port of the PAL video optical terminal and the near-end receiving serial port of the HD-SDI video optical terminal receive a 50Hz differential synchronization signal with a level of RS485 / RS422 generated by the timing terminal through a synchronization generator; the near-end receiving serial port of the cameralink video optical terminal receives a 25-400Hz differential synchronization signal with a level of RS485 / RS422 generated by the timing terminal through a synchronization generator.

[0032] Furthermore, it also includes a photoelectric theodolite;

[0033] The video camera is installed on the photoelectric theodolite;

[0034] The extracted information includes the miss distance, time, target wave gate of the multifunctional video tracker, crosshairs, and azimuth angle value and pitch angle value of the photoelectric theodolite; the character overlay information includes the miss distance, time, target wave gate of the multifunctional video tracker, crosshairs, and azimuth angle value and pitch angle value of the photoelectric theodolite.

[0035] The present invention also proposes a measurement method for long-distance transmission of PAL, HD-SDI and CameraLink videos, which has the following characteristics:

[0036] Based on the above-mentioned real-time display system for long-distance transmission of PAL, HD-SDI and cameralink interface videos, it also includes a second multifunctional real-time video acquisition and display module, a first image storage module and a second image storage module;

[0037] The signal receiving end of the second multifunctional real-time video acquisition and display module is used to receive the differential synchronization signal sent by the time system terminal. The second multifunctional real-time video acquisition and display module is connected to the first image storage module and is used to receive the video image sent by the second multifunctional real-time video acquisition and display module. The video output end of the second multifunctional real-time video acquisition and display module is connected to the remote transmitting end of the optical terminal module; the second image storage module is connected to the first multifunctional real-time video acquisition and display module and is used to receive the video image sent by the first multifunctional real-time video acquisition and display module.

[0038] The method comprises the following steps:

[0039] Step 1: At the far-end transmitting end of the optical terminal module, the second multifunctional real-time video acquisition and display module generates multiple video images in a continuous and gradually increasing grayscale value cycle in real time. At the same time, at the beginning of the transmission of each video image, the serial time code of the differential synchronization signal sent by the time system terminal is collected, and the serial time code is converted into N time characters, and the ASCII code values corresponding to the N time characters are used to replace the first N image data of the Lth row in the video image data. The second multifunctional real-time video acquisition and display module uses the second pulse differential signal and the 10MHz clock differential signal sent by the real-time collected time system terminal to generate a video frame signal FVAL or a video field signal Field aligned with the rising edge of the second pulse differential signal, and converts the replaced image data into a video signal in real time. , after passing through the remote transmitting end, the optical fiber and the near-end receiving end in sequence, it is sent to the first multifunctional real-time video acquisition and display module, which converts the received video signal into a frame signal FVAL, a line signal LVAL, and 8-bit image data. At the rising edge of the decoded frame signal FVAL, the serial time code of the synchronous signal of the time system terminal is collected, and the serial time code is converted into N time characters. The ASCII code values corresponding to the N time characters replace the first N image data of the Lth line in the video image data, and then sent to the second image storage module for storage; the other real-time format is converted into a cameralink video image, and then sent to the first image storage module for storage in real time; wherein, the grayscale value of the video image does not exceed 235,

[0040] Step 2: Determine if there is image loss or delay

[0041] The images stored in the first image storage module and the second image storage module are compared to determine whether there is image loss or delay. If there is no image loss or delay, it means that the real-time display system for long-distance transmission of PAL, HD-SDI and cameralink interface video can achieve real-time display and measurement. Otherwise, real-time display and measurement cannot be achieved.

[0042] Furthermore, the comparison method in step 2 is:

[0043] The first image storage module and the second image storage module simultaneously store images for 30 minutes, and compare each image with the same frame number. In the two image data with the same frame number, the first N image data of the Lth row of each image are reversely converted into millisecond values and compared. If they are the same, it means there is no image loss or delay. If they are different, there is image loss or delay.

[0044] The beneficial effects of the present invention are:

[0045] 1. In the present invention, PAL, HD-SDI, and CameraLink interface videos are converted into optical fiber signals through the far-end transmitting end of the optical terminal module, and optical fiber is used for long-distance transmission. At the near-end receiving end, the optical fiber signals are converted into PAL, HD-SDI, and CameraLink video signals in real time. The first multifunctional real-time acquisition and display module performs real-time acquisition and format conversion, and sends them to the display for display. This not only realizes long-distance transmission, but also solves the problems of video image stagnation, video image blocking, and long video image transmission delay.

[0046] 2. In the present invention, the multifunctional video tracker is provided to realize the character overlay function of PAL and HD-SDI video, including the superimposition of target miss distance, time, pitch angle, azimuth angle, target gate, crosshairs and other information from the multifunctional video tracker, so as to facilitate tracking by the multifunctional video tracker.

[0047] 3. The present invention can be used for on-site long-distance video transmission display and real-time tracking measurement of long-distance video images.

[0048] 4. In the present invention, the real-time detection and measurement of the transmitted video signal can be achieved through the real-time measurement of the video image, which effectively solves the real-time measurement problem of the long-distance video image in the shooting range. The delay in transmitting the video signal or the video image signal is less than 10ms, which meets the needs of long-distance real-time and accurate measurement and tracking in the shooting range.

[0049] 5. In the present invention, by setting up the second multifunctional real-time video acquisition and display module, the first image storage module and the second image storage module, the real-time measurement of the real-time display system for long-distance transmission of PAL, HD-SDI and cameralink interface videos is achieved.

[0050] 6. The present invention can be used for real-time detection of long-distance video transmission on-site in industry, military industry and defense industry, and is suitable for real-time video tracking and real-time detection of long-distance transmission systems.

[0051] 7. The present invention supports long-distance transmission and real-time detection of PAL, HD-SDI and cameralink interface video images.

[0052] 8. The present invention can realize the long-distance real-time transmission and display of PAL, HD-SDI and CameraLink interface video images; it can realize the character overlay function of PAL, HD-SDI and CameraLink interface video images, including the superposition of target miss distance, time, pitch angle, azimuth angle, target wave gate from the video tracker, crosshairs and other information.

[0053] 9. The present invention can realize the video conversion function, including converting PAL video to HD-SDI high-definition video display, and converting cameralink to HD-SDI high-definition video display.

[0054] 10. The present invention supports the function of converting PAL and HD-SDI high-definition videos into cameralink interface format videos, and supports converting PAL and HD-SDI high-definition videos into cameralink interface videos to provide a unified video source for the storage module and the multi-functional video tracker. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is the structural principle of the embodiment of the present invention;

[0056] Figure 2 This is a PAL signal processing flow in an embodiment of the present invention;

[0057] Figure 3 This is a Cameralink signal processing flow in an embodiment of the present invention;

[0058] Figure 4 1 is a schematic diagram of a signal receiving principle of a first image storage module in an embodiment of the present invention;

[0059] Figure 5 is a schematic diagram of a signal receiving principle of a second image storage module in an embodiment of the present invention;

[0060] Figure 6 is a structural principle diagram of a multifunctional video tracker in an embodiment of the present invention;

[0061] Figure 7 This is a structural principle diagram of a first multifunctional real-time video acquisition and display module in an embodiment of the present invention;

[0062] Figure 8 It is a structural principle diagram of the second multifunctional real-time video acquisition and display module in an embodiment of the present invention. DETAILED DESCRIPTION

[0063] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0064] The present invention proposes a real-time display system for long-distance transmission of PAL, HD-SDI and cameralink videos, such as Figure 1 As shown, it includes a first multifunctional real-time video acquisition and display module, an optical terminal module, a time synchronization terminal and a multifunctional video tracker;

[0065] In order to achieve real-time measurement of the entire system, a second multifunctional real-time video acquisition and display module, a first image storage module and a first and second image storage module are added;

[0066] The composition and connection methods of each component are as follows:

[0067] The composition and structure of the multifunctional video tracker are as follows:

[0068] like Figure 6 As shown, the multifunctional video tracker includes: a third FPGA main chip, a first power chip TPS65265 connected to the third FPGA main chip, a configuration chip EPCS128, a serial port chip SN65HVD77DR, two FPGA memory chips SDRAM1 chip MT48LC4M32B2 and SDRAM2 chip MT48LC4M32B2, wherein the SDRAM1 chip MT48LC4M32B2, the SDRAM2 chip MT48LC4M32B2, the configuration chip EPCS128 and The serial port chip SN65HVD77DR and the third FPGA master chip are in bidirectional communication, and the SDRAM1 chip MT48LC4M32B2 and the SDRAM2 chip MT48LC4M32B2 form a ping-pong storage structure; the interface connector J30J-21TJWP7-J of the third FPGA master chip is used to connect to the first multi-functional real-time video acquisition and display module, and is used to receive the video signal (frame signal FVAL, line signal LVAL, parallel data DATA and PCLK) sent by the first multi-functional real-time video acquisition and display module;

[0069] It also includes a DSP chip TMS320C6455, a second power chip TPS65265 and a FLASH chip MT28EW128 connected to the DSP chip TMS320C6455. The FLASH chip MT28EW128 and the DSP chip TMS320C6455 achieve bidirectional communication; the DSP chip TMS320C6455 and the third FPGA main chip achieve bidirectional communication through the EMIF bus.

[0070] The main function of this multifunctional tracker is to receive the video signal from the first multifunctional real-time video acquisition and display module through the third FPGA main chip plug-in J30J-21TJWP7-J, and cache it in the ping-pong storage structure. The DSP chip TMS320C6455 reads the video signal in the ping-pong storage structure through the EMIF bus that interacts with the third FPGA main chip and extracts information from the received video signal, and sends the extracted information to the third FPGA main chip through the EMIF bus. The third FPGA main chip sends it to the first multifunctional real-time video acquisition and display module through the serial port RS485 chip SN65HVD77DR.

[0071] The functions of each chip are as follows:

[0072] The third FPGA main chip mainly receives the video signal from the first multifunctional real-time video acquisition and display module, converts it into a video image, and stores it in a ping-pong storage structure, so that the DSP chip TMS320C6455 can read the video image signal of the storage chip through the EMIF bus. The third FPGA main chip receives the off-target amount and other information calculated by the DSP chip TMS320C6455 through the EMIF bus, and sends it to the first multifunctional real-time video acquisition and display module through the serial port RS485 chip SN65HVD77DR.

[0073] The configuration chip of the third FPGA master chip is EPCS128, which is mainly used to load the program written by the third FPGA master chip.

[0074] The first power supply chip is TPS65265, which has an input voltage of 12V and output voltages of 3.3V and 1.2V respectively. The maximum current of the 3.3V power supply is 5A, and the maximum current of the 1.2V power supply is 3A. It mainly provides power for the third FPGA main chip.

[0075] The serial port chip is the SN65HVD77DR, a full-duplex RS-485 chip with one RS-485 receive and one RS-485 transmit function. It operates from a 3.3V supply voltage and primarily receives pitch angle, azimuth angle, time code, and focal length information from the serial port. Information such as miss distance, time code, target area, and segmentation threshold is then transmitted via the FPGA chip.

[0076] The DSP chip is TMS320C6455, which mainly receives video images from the SDRAM of FPGA through the EMIF bus, performs calculations on the video images, extracts the miss distance information, target area information, segmentation threshold and other information of the image target, and sends the calculated information to the FPGA chip through the EMIF bus.

[0077] The DSP's power supply chip is the TPS65265, which has a 12V input voltage and output voltages of 3.3V, 1.2V, and 1.8V. The maximum current for the 3.3V power supply is 5A, the maximum current for the 1.8V power supply is 2A, and the maximum current for the 1.2V power supply is 3A. This chip primarily provides power for the DSP chip.

[0078] The DSP's FLASH chip is MT28EW128, which is mainly used to store the written DSP program and run the saved DSP program when the chip is powered on.

[0079] The third FPGA main chip is chip EP2S90F1020I4N.

[0080] The structure and composition of the first multifunctional real-time video acquisition and display module are as follows:

[0081] like Figure 7 As shown, it includes a first decoding unit, a first encoding unit, an external synchronization unit, a storage unit, a first FPGA master chip EP4SGX230FF35I4N and a communication unit;

[0082] The storage unit includes two MT48LC4M32 memory chips connected to the first FPGA master chip, and the two memory chips form a ping-pong storage structure. The external synchronization unit includes a first external synchronization signal input unit having an input end for receiving a differential signal sent by a system terminal and an output end connected to the first FPGA master chip, and a synchronization generator having an input end connected to the first FPGA master chip and an output end connected to the serial port of the near-end receiving end. The decoding unit includes a PAL decoding chip ADV7183, a high-definition video decoding chip GS2971, and a Cameralink decoding chip DS90CR288A, each having an input end connected to the near-end receiving end and an output end connected to the first FPGA master chip.

[0083] The first encoding unit includes a first encoding chipset having an input end connected to the first FPGA main chip and an output end connected to the multifunctional video tracker, a second encoding chipset having an input end connected to the first FPGA main chip and an output end connected to the display, and a third encoding chipset having an input end connected to the first FPGA main chip and an output end connected to the second image storage module, wherein the first encoding chipset includes a PAL encoding chip ADV7179, an HD-SDI encoding chip GS2972, and a Cameralink encoding chip DS90CR287A; the second encoding chipset also includes a PAL encoding chip ADV7179, an HD-SDI encoding chip GS2972, and the third encoding chipset includes a Cameralink encoding chip DS90CR287A;

[0084] The communication unit includes a serial communication chip LTC2850, a serial communication chip MAX232, and a network communication chip 88E1111, each of which is connected to the first FPGA main chip at one end and to the multi-functional video tracker at the other end; the serial communication chip LTC2850 is used to convert the TTL level output by the first FPGA main chip into an RS485 / RS422 differential signal and send it to the third FPGA main chip of the multi-functional video tracker, and convert the RS485 / RS422 differential signal emitted by the third FPGA main chip into a TTL level and send it to the FPGA main chip; the serial communication chip MAX232 is used to convert the TTL level output by the first FPGA main chip into an RS232 communication signal and send it to the third FPGA main chip, and convert the RS232 communication signal emitted by the third FPGA main chip into a TTL level and send it to the first FPGA main chip; the network communication chip 88E1111 is used to send the extraction information emitted by the multi-functional video tracker to the FPGA main chip.

[0085] The principle is as follows: the first external synchronization signal input unit sends the 1Hz and 10MHz differential signals emitted by the received timing terminal to the synchronization generator through the first FPGA main chip. The synchronization generator processes the received differential signal to generate the differential signal (LVDS differential signal and RS485 level differential signal) required by the optical terminal module of the corresponding standard, and sends it to the near-end receiving end serial port. The near-end receiving end serial port passes through the optical fiber and the remote transmitting end serial port in turn and is sent to the corresponding video camera. After receiving the differential signal, the video camera sends a video signal and sends it to the corresponding standard decoding chip in real time through the remote transmitting end, optical fiber and near-end receiving end in real time. After the decoding chip decodes the received video signal in real time, it uses the ping-pong cache method to perform real-time storage and reading through the first FPGA main chip, and sends it to the corresponding standard encoding chip for encoding after real-time standard conversion. After that, it is sent to the third FPGA main chip of the multifunctional video tracker in real time through the serial port RS485 chip SN65HVD77DR. The third FPGA main chip converts the received video signal into a video image in real time and sends it to the DSP chip TMS320C6455. The DSP chip TMS320C6455 extracts the extracted information in the video image and sends the extracted information to the first FPGA main chip through the serial port RS485 chip SN65HVD77DR and the network port communication chip 88E1111. The first FPGA main chip generates character information in real time from the received extracted information, and then converts the real-time read video signal into another one and superimposes the character information on it, and then sends it to the encoding chip of the corresponding standard in the second encoding chip group. After the encoding chip encodes the received video signal in real time, it sends it to the display for real-time display.

[0086] Alternatively, the first FPGA main chip performs real-time format conversion on the video signal received from the near-end receiving end to generate a video image signal, and after real-time encoding through the third encoding chipset, sends it to the second image storage module for storage.

[0087] The structure and composition of the second multifunctional real-time video acquisition and display module are as follows:

[0088] The second multifunctional real-time video acquisition and display module includes a second encoding unit, a second external synchronization signal input unit, and a second FPGA main chip EP4SGX230FF35I4N;

[0089] The second encoding unit includes a fourth encoding chipset having one end connected to the second FPGA main chip and one end connected to the remote transmitting end, and a fifth encoding chipset having one end connected to the second FPGA main chip and one end connected to the first image storage module, the fourth encoding chipset including a PAL encoding chip ADV7179, an HD-SDI encoding chip GS2972, and a Cameralink encoding chip DS90CR287A, and the fifth encoding chipset including a Cameralink encoding chip DS90CR287A;

[0090] The input end of the second external synchronization signal input unit is used to receive the 1Hz and 10MHz differential signals sent by the timing terminal, and the output end is connected to the second FPGA main chip;

[0091] The second external synchronization signal input unit transmits the 1Hz and 10MHz differential signals received from the timing terminal to the second FPGA main chip. The second FPGA main chip generates multiple continuous video images in a camera mode cycle. After real-time format conversion, one channel generates a video signal and sends it to the encoding chip of the corresponding format in the fourth encoding chip group. The encoding chip encodes the received video signal and sends it to the remote sending end; the other channel is sent to the fifth encoding chip group for real-time encoding, and then sent to the first image storage module for storage.

[0092] The functions of each component are as follows:

[0093] The CameraLink video optical terminal converts the CameraLink video signal sent by the CameraLink video camera received at the remote sending end into an optical fiber signal in real time, transmits it through a single-mode optical fiber, converts the optical fiber signal into a CameraLink video signal in real time at the near-end receiving end, and sends it to the first multi-functional real-time video acquisition and display module for real-time acquisition.

[0094] The PAL video optical terminal converts the PAL video signal sent by the PAL video camera received at the far-end transmitting end into an optical fiber signal in real time, transmits it through a single-mode optical fiber, converts the optical fiber signal into a PAL video signal in real time at the near-end receiving end, and outputs it to the first multi-functional real-time video acquisition and display module for real-time acquisition.

[0095] The HD-SDI video optical terminal converts the HD-SDI video signal sent by the HD-SDI video camera received at the remote transmitting end into an optical fiber signal in real time, transmits it through a single-mode optical fiber, converts the optical fiber signal into an HD-SDI video signal in real time at the near-end receiving end, and outputs it to the first multi-functional real-time video acquisition and display module for real-time acquisition.

[0096] The multifunctional real-time video acquisition and display module receives RS485 / RS422 differential synchronization signals with a frequency of 50Hz for PAL video synchronous transmission, RS485 / RS422 differential synchronization signals with a frequency of 50Hz for HD-SDI video synchronous transmission, and RS485 / RS422 differential synchronization signals with a frequency of 50Hz or 100Hz for Cameralink video synchronous transmission.

[0097] The present invention can also realize a character overlay function: the first multifunctional real-time acquisition and display module converts the real-time acquired PAL video signal and / or HD-SDI video signal into PAL video and / or HD-SDI video in one format, and converts the whole format into a frame signal FVAL, a line signal LVAL, and parallel data DATA, which are sent to a multifunctional video tracker, and receives extracted information extracted by the multifunctional video tracker from the received frame signal FVAL, the line signal LVAL, and the parallel data DATA. The first multifunctional real-time video acquisition and display module overlays the received extracted information on the converted PAL video and / or HD-SDI video, and after encoding by the PAL video encoding chip ADV7179 and / or the HD-SDI video encoding chip GS2972 of the first multifunctional real-time video display module, outputs the PAL video and / or HD-SDI video with character overlay, wherein the extracted information includes the target miss distance, time, target area, target number, target average grayscale mean, etc.

[0098] The first multifunctional real-time acquisition and display module converts the real-time acquired cameralink video image into a unified format frame signal FVAL, line signal LVAL, and parallel data DATA and sends them to the multifunctional video tracker, and receives the extraction information extracted by the multifunctional video tracker from the received frame signal FVAL, line signal LVAL, and parallel data DATA. It converts the cameralink video signal format into PAL video and / or HD-SDI video, and after completing the character conversion of the received extraction information, it is superimposed on the PAL video and / or HD-SDI video, and outputs the PAL video and / or HD-SDI video in real time. The extraction information includes the target's miss distance, time, target area, target number, target average grayscale mean, etc.

[0099] If the video camera is installed on a photoelectric theodolite, the extracted information also includes the azimuth angle value and the pitch angle value of the photoelectric theodolite.

[0100] The real-time video display process based on the above system is as follows:

[0101] like Figure 2 As shown, Path 1: PAL video remote external synchronous transmission

[0102] The timing terminal outputs a 50Hz frequency and a level of RS485 / RS422 differential synchronization signal to the near-end receiving serial port of the PAL video optical terminal. The near-end receiving serial port of the PAL video optical terminal converts the received synchronization signal into an optical fiber signal and transmits it to the far-end sending serial port of the PAL video optical terminal through a single-mode optical fiber. The far-end sending serial port of the PAL video optical terminal converts the optical fiber signal into an RS485 / RS422 serial port signal and transmits it to the PAL video camera. After receiving the RS485 / RS422 serial port signal, the PAL video camera outputs a PAL video signal of the same frequency and sends it to the far-end sending end of the PAL video optical terminal. The PAL video optical terminal converts the PAL video signal received by the far-end sending end into an optical fiber signal in real time, transmits it through a single-mode optical fiber, and converts the optical fiber signal into a PA signal in real time at the near-end receiving end. L-system video signal, and output it to the first multifunctional real-time video acquisition and display module, the multifunctional real-time video acquisition and display module performs real-time acquisition on the input PAL video signal, and converts it into a frame signal FVAL, a line signal LVAL, and parallel data DATA in a unified format in real time and sends them to the multifunctional video tracker, the multifunctional video tracker extracts information from the input frame signal FVAL, the line signal LVAL, and the parallel data DATA, and sends the extracted information to the first multifunctional real-time video acquisition and display module, the multifunctional real-time video acquisition and display module converts the received information into character information, and superimposes it on the PAL video in real time, and encodes the PAL video superimposed with data information in real time through the PAL video encoding chip ADV7179 of the first multifunctional real-time video display module, and outputs the video with character superimposition to the display.

[0103] Path 2: HD-SDI video remote external synchronous transmission

[0104] The timing terminal outputs a 50Hz frequency and a level of RS485 / RS422 differential synchronization signal to the near-end receiving serial port of the HD-SDI video optical terminal. The near-end receiving serial port of the HD-SDI video optical terminal converts the received synchronization signal into an optical fiber signal and transmits it to the remote transmitting serial port of the HD-SDI video optical terminal through a single-mode optical fiber. The remote transmitting serial port of the HD-SDI video optical terminal converts the optical fiber signal into an RS485 / RS422 serial port signal and transmits it to the HD-SDI video camera. After receiving the RS485 / RS422 serial port signal, the HD-SDI video camera outputs an HD-SDI video signal of the same frequency and sends it to the remote transmitting end of the HD-SDI video optical terminal. The HD-SDI video optical terminal converts the HD-SDI video signal received at the remote transmitting end into an optical fiber signal in real time, transmits it through a single-mode optical fiber, and converts the optical fiber signal into an RS485 / RS422 serial port signal in real time at the near-end receiving end. The video signal is converted into an HD-SDI video signal and output to the first multifunctional real-time video acquisition and display module. The first multifunctional real-time video acquisition and display module acquires the input HD-SDI video in real time, and converts it into a frame signal FVAL, a line signal LVAL, and parallel data DATA in a unified format in real time and sends them to the multifunctional video tracker. The multifunctional video tracker extracts information from the input frame signal FVAL, the line signal LVAL, and the parallel data DATA, and sends the extracted information to the first multifunctional real-time video acquisition and display module. The first multifunctional real-time video acquisition and display module converts the received extracted information into character information, and superimposes it on the HD-SDI video in real time. The HD-SDI video superimposed with data information is encoded in real time by the HD-SDI video encoding chip GS2972 of the first multifunctional real-time video display module, and outputs the video with character superimposition to the display.

[0105] like Figure 3 As shown, Path 3: CameraLink video remote external synchronous transmission

[0106] The timing terminal outputs a 50Hz or 100Hz frequency and an RS485 / RS422 differential synchronization signal to the near-end receiving serial port of the CameraLink video optical terminal. The near-end receiving serial port of the CameraLink video optical terminal converts the received synchronization signal into an optical fiber signal and transmits it to the far-end transmitting serial port of the CameraLink video optical terminal through a single-mode optical fiber. The far-end transmitting serial port of the CameraLink video optical terminal converts the optical fiber signal into an RS485 / RS422 serial port signal and transmits it to the CameraLink video camera. After receiving the RS485 / RS422 serial port signal, the CameraLink video camera outputs a CameraLink video image signal of the same frequency to the far-end transmitting end of the CameraLink video optical terminal. The CameraLink video optical terminal converts the CameraLink video image signal received by the far-end transmitting end into an optical fiber signal in real time and transmits it through a single-mode optical fiber. At the near-end receiving end, the optical fiber signal is converted into an RS485 / RS422 serial port signal in real time. The cameralink video image signal is output to the first multifunctional real-time video acquisition and display module. The first multifunctional real-time video acquisition and display module acquires the input cameralink video image signal in real time, and converts the acquired cameralink video image signal into a frame signal FVAL, a line signal LVAL, and parallel data DATA in a unified format in real time, and sends the converted data to the multifunctional video tracker. The multifunctional video tracker extracts data information from the input frame signal FVAL, the line signal LVAL, and the parallel data DATA, and sends the extracted information to the first multifunctional real-time video acquisition and display module. The acquired cameralink video image signal format is converted into HD-SDI video and / or PAL video. The first multifunctional real-time video acquisition and display module converts the received extracted information into character information, and superimposes it on the HD-SDI video and / or PAL video in real time, and outputs the HD-SDI video and / or PAL video to the display in real time.

[0107] Based on the real-time display system of the above system, a real-time measurement method is proposed, such as Figure 4 and Figure 6 As shown, taking PAL video as an example, the specific steps include:

[0108] Step 1: At the remote transmitting end of the PAL video optical terminal, the second multifunctional real-time video acquisition and display module generates a plurality of video image information in a continuous and gradually increasing grayscale value cycle in real time. For example, the pixel grayscale value of the first video image is all 16, and the image size is 720×288; the pixel grayscale value of the second video image is 17, and the image size is 720×288; the pixel grayscale value of the third image is 18, and the image size is 720×288; ..., the pixel grayscale value of the 220th video image is all 235, and the image size is 720×288; after the 220th video image is generated, the video images from the 1st to the 220th are sent in a cycle; at the same time, at the beginning of each video image transmission, the serial time code of the RS422 signal sent by the acquisition terminal is collected. The frequency of the serial time code is 100Hz, and the unit of the time code is milliseconds. The number of milliseconds is converted into 2 characters for hour value, 2 characters for minute value, 2 characters for second value and 3 characters for millisecond value at the 144th line of each frame image. After the character conversion is completed, the converted characters are converted into corresponding ASCII code values to replace the first 9 image data of the last line of image data of the video image data. The second multifunctional real-time video acquisition and display module collects the second pulse differential signal and the 10MHz clock differential signal sent by the time system terminal, generates a 50Hz video frame signal FVAL or video field signal Field aligned with the rising edge of the second pulse differential signal, and converts the above video image information into PAL video according to the PAL format and re-encodes it, and sends it to the transmitting end of the optical terminal module, and then re-encodes it and sends it to the first image storage module in real time for storage; the transmission frequency of the video image is 50Hz, and the pixel clock is 27MHz;

[0109] The optical terminal module sends the received video signal to the first multifunctional real-time video acquisition and display module. The first multifunctional real-time video acquisition and display module converts the received video signal into a frame signal FVAL, a line signal LVAL, 8-bit image data, and a pixel clock of 27MHz. At the same time, the serial time code of the time system terminal synchronization signal is again collected at the rising edge of the decoded frame signal FVAL. The time code level is an RS422 signal, the frequency of the serial time code is 100Hz, and the unit of the time code is milliseconds. The collected time code is converted into a 2-byte hour character, a 2-byte minute character, a 2-byte second character, and a 3-byte millisecond character at the rising edge of each frame signal. After the character conversion is completed, the ASCII code value corresponding to the converted character is used to replace the first 9 image data of the last line of image data. The new video image obtained after the replacement is converted into cameralink interface image data and sent to the second image storage module in real time for storage.

[0110] Step 2: Store images in both image storage modules simultaneously for 30 minutes and compare each image with the same frame number. For the same image data, reverse-convert the first 9 characters of the last line of data of the image received by the first image storage module and the image received by the second image storage module into millisecond values and compare the millisecond values of the two images. If they are the same, it indicates that there is no image loss or delay. If they are different, there is image loss or delay.

Claims

1. A real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos, characterized by: It includes an optical terminal module and a first multifunctional real-time video acquisition and display module; The optical terminal module includes a far-end transmitting end and a near-end receiving end connected by optical fiber; The signal receiving end of the first multifunctional real-time video acquisition and display module is used to receive the differential synchronization signal sent by the time system terminal, the signal transmitting end of the first multifunctional real-time video acquisition and display module is serially connected to the near-end receiving end of the optical terminal module, the far-end transmitting end serial port of the optical terminal module is used to connect to the signal receiving end of the video camera, the far-end transmitting end of the optical terminal module is connected to the video output end of the video camera, and the near-end receiving end of the optical terminal module is connected to the video input end of the first multifunctional real-time video acquisition and display module; The first multifunctional real-time video acquisition and display module receives the differential synchronization signal sent by the time system terminal, and sequentially transmits the received differential synchronization signal to the video camera in real time through the near-end receiving end serial port of the optical terminal module, the optical fiber, and the far-end transmitting end serial port of the optical terminal module. After receiving the differential synchronization signal, the video camera transmits a video signal in real time, and sequentially transmits the video signal through the far-end transmitting end of the optical terminal module, the optical fiber, and the near-end receiving end of the optical terminal module in real time to the first multifunctional real-time video acquisition and display module for real-time data acquisition; The first multifunctional real-time video acquisition and display module converts and re-encodes the received video signal in real time and sends it to the display for real-time display; It also includes a second multifunctional real-time video acquisition and display module for performing real-time measurement, a first image storage module and a second image storage module; The signal receiving end of the second multifunctional real-time video acquisition and display module is used to receive the differential synchronization signal sent by the time system terminal, the second multifunctional real-time video acquisition and display module is connected to the first image storage module, and the video output end of the second multifunctional real-time video acquisition and display module is connected to the remote transmitting end of the optical terminal module; the second image storage module is connected to the first multifunctional real-time video acquisition and display module, and is used to receive the video image sent by the first multifunctional real-time video acquisition and display module; After receiving the differential synchronization signal, the second multifunctional real-time video acquisition and display module cyclically sends out multiple grayscale continuous video images. At the same time, at the start end of sending each video image, it collects the serial time code of the differential synchronization signal sent by the time system terminal, converts the serial time code into 9 time characters, including 2 characters representing hour values, 2 characters representing minute values, 2 characters representing second values, and 3 characters representing millisecond values, and replaces the first 9 image data of the last row of image data in the video image with the ASCII code values corresponding to the multiple time characters. The second multifunctional real-time video acquisition and display module uses the second pulse differential signal and the 10MHz clock differential signal sent by the real-time collected time system terminal to generate a video frame signal FVAL or a video field signal Field aligned with the rising edge of the second pulse differential signal; and encodes the replaced video image in real time and sends it to the first image storage module for storage. It also performs real-time format conversion and encoding to generate a video signal, and sends the video signal in real time to the first multifunctional real-time video acquisition and display module through the far-end transmitting end of the optical terminal module, the optical fiber, and the near-end receiving end of the optical terminal module. The first multifunctional real-time video acquisition and display module converts the received video image into a frame signal FVAL, a line signal LVAL, 8-bit image data, and a pixel clock of 27MHz. At the same time, the serial time code of the time system terminal synchronization signal is again acquired at the rising edge of the decoded frame signal FVAL; the acquired serial time code is converted into a 2-byte hour character, a 2-byte minute character, a 2-byte second character, and a 3-byte millisecond character at the rising edge of each frame signal; after the character conversion is completed, the ASCII code value corresponding to the converted character is used to replace the first 9 image data of the last row of image data of the image data. After the replacement, the new video image obtained is converted into cameralink interface image data and sent to the second image storage module in real time for storage.

2. The real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to claim 1, characterized in that: Also included is a multi-function video tracker; The multifunctional video tracker is connected to the first multifunctional real-time video acquisition and display module and realizes mutual communication; The first multifunctional real-time video acquisition and display module converts and encodes the received video signal in real time and sends it to the multifunctional video tracker in real time for target tracking, and uses ping-pong buffer for real-time storage. The multifunctional video tracker extracts information from the received video signal and sends it to the first multifunctional real-time video acquisition and display module to generate character information; The first multifunctional real-time video acquisition and display module reads the stored video signal in real time, and after real-time format conversion, character information superposition and re-encoding, sends it to the display for real-time display; The extracted information includes the miss distance and time; the character information includes the miss distance, time and the target wave gate and crosshairs of the multifunctional video tracker.

3. A real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to claim 2, characterized in that : The second multifunctional real-time video acquisition and display module includes a second encoding unit, a second external synchronization signal input unit, and a second FPGA main chip; The second encoding unit includes a fourth encoding chip group having one end connected to the second FPGA main chip and one end connected to the remote transmitting end of the optical terminal module, and a fifth encoding chip group having one end connected to the second FPGA main chip and one end connected to the first image storage module; The input end of the second external synchronization signal input unit is connected to the time synchronization terminal, and the output end is connected to the second FPGA main chip, and is used to receive the 1Hz and 10MHz differential signals sent by the time synchronization terminal; The second external synchronization signal input unit transmits the 1Hz and 10MHz differential signals received from the timing terminal to the second FPGA main chip. The second FPGA main chip generates multiple continuous video images in a camera mode cycle. After real-time format conversion, one channel generates a video signal and sends it to the fourth encoding chip group. The fourth encoding chip group encodes the received video signal and sends it to the remote sending end; the other channel is sent to the fifth encoding chip group for real-time encoding, and then generates a video image signal and sends it to the first image storage module for storage.

4. A real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to claim 3, characterized in that : The first multifunctional real-time video acquisition and display module includes a first decoding unit, a first encoding unit, an external synchronization unit, a storage unit, a first FPGA main chip and a communication unit; The storage unit includes two storage chips connected to the first FPGA main chip, and the two storage chips form a ping-pong storage structure; The external synchronization unit includes a first external synchronization signal input unit whose input end is connected to the receiving terminal and whose output end is connected to the first FPGA main chip, and a synchronization generator whose input end is connected to the first FPGA main chip and whose output end is connected to the serial port of the near-end receiving end; The first decoding unit includes at least one decoding chip selected from the group consisting of a PAL decoding chip, a high-definition video decoding chip, and a Cameralink decoding chip, the input ends of which are respectively connected to the proximal receiving end, and the output ends of which are respectively connected to the first FPGA main chip; and the number of each decoding chip is at least one; The first encoding unit includes a first encoding chipset connected to the first FPGA main chip at its input end and connected to the multifunctional video tracker at its output end, a second encoding chipset connected to the first FPGA main chip at its input end and connected to the display at its output end, and a third encoding chipset connected to the first FPGA main chip at its input end and connected to the second image storage module at its output end. The communication unit includes a serial communication chip LTC2850, a serial communication chip MAX232 and a network communication chip 88E1111 respectively connected to the first FPGA main chip at one end and the multifunctional video tracker at the other end; The first external synchronization signal input unit sends the 1Hz and 10MHz differential signals sent by the received time system terminal to the synchronization generator through the first FPGA main chip. The synchronization generator processes the received differential signal to generate LVDS differential signal and RS485 level differential signal, and sends it to the near-end receiving end serial port. The near-end receiving end serial port passes through the optical fiber and the remote transmitting end serial port in turn and then sends it to the video camera. After receiving the differential signal, the video camera sends a video signal and sends it to the first decoding unit in real time through the remote transmitting end, optical fiber and near-end receiving end in turn. After the first decoding unit decodes the received video signal in real time, it uses the first FPGA main chip to store and read it in real time using the ping-pong cache method, and sends it after real-time format conversion. The first encoding chipset is encoded and sent to the multifunctional video tracker in real time. The multifunctional video tracker extracts information from the received video signal and sends it to the first FPGA main chip through the network port communication chip 88E1111. The first FPGA main chip generates character information in real time from the received extracted information, and then converts the real-time read video signal into another channel and superimposes the character information on it before sending it to the second encoding chipset. The second encoding chipset encodes the received video signal in real time and sends it to the display for real-time display. Alternatively, the first FPGA main chip converts the received video signal into a real-time format to generate a video image signal, and after real-time encoding through the third encoding chipset, sends it to the second image storage module for storage.

5. A real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to claim 4, characterized in that : The multifunctional video tracker includes a third FPGA main chip, a DSP chip TMS320C6455, a first power chip TPS65265 connected to the third FPGA main chip, a configuration chip EPCS128, a serial port chip SN65HVD77DR, two FPGA memory chips; a second power chip TPS65265 and a FLASH chip MT28EW128 connected to the DSP chip TMS320C6455; the third FPGA main chip and the DSP chip TMS320C6455 are connected via an EMIF bus. The FLASH chip MT28EW128 and the DSP chip TMS320C6455 are in bidirectional communication, the configuration chip EPCS128, the serial port chip SN65HVD77DR and the two FPGA memory chips are in bidirectional communication with the third FPGA master chip, and the two FPGA memory chips form a ping-pong storage structure; the third FPGA master chip is connected to the first encoding chipset, and the serial port chip SN65HVD77DR is connected to the serial port communication chip LTC2850, the serial port communication chip MAX232 and the network port communication chip 88E1111; The video signal emitted by the first encoding chipset is stored in real time in a ping-pong storage structure through the third FPGA main chip using a ping-pong cache method. The DSP chip TMS320C6455 reads and extracts information from the ping-pong storage structure in real time through the EMIF bus, and sends the extracted information to the first FPGA main chip in sequence through the EMIF bus, the third FPGA main chip, and the network port communication chip 88E1111.

6. The real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to claim 5, characterized in that: The remote transmitting end converts the received video signal into an optical fiber signal in real time, transmits the signal through optical fiber, and converts the optical fiber signal into a video signal in real time at the near receiving end; The optical terminal module is at least one of a PAL video optical terminal, an HD-SDI video optical terminal, and a cameralink video optical terminal, and the number of each type of optical terminal is at least one; The near-end receiving serial port of the PAL video optical terminal and the near-end receiving serial port of the HD-SDI video optical terminal receive a 50Hz differential synchronization signal with a level of RS485 / RS422 generated by the timing terminal through a synchronization generator; the near-end receiving serial port of the cameralink video optical terminal receives a 25-400Hz differential synchronization signal with a level of RS485 / RS422 generated by the timing terminal through a synchronization generator.

7. A real-time display system for long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to any one of claims 2 to 6, characterized in that: Also included is a photoelectric theodolite; The video camera is installed on the photoelectric theodolite; The extracted information includes the miss distance, time, target wave gate of the multifunctional video tracker, crosshairs, and azimuth angle value and pitch angle value of the photoelectric theodolite; the character information includes the miss distance, time, target wave gate of the multifunctional video tracker, crosshairs, and azimuth angle value and pitch angle value of the photoelectric theodolite.

8. A method for measuring the real-time performance of long-distance transmission of PAL, HD-SDI, and CameraLink interface video, characterized by: A real-time display system for long-distance transmission of PAL, HD-SDI and cameralink interface videos according to claim 1, further comprising a second multifunctional real-time video acquisition and display module, a first image storage module and a second image storage module; The signal receiving end of the second multifunctional real-time video acquisition and display module is used to receive the differential synchronization signal sent by the time system terminal. The second multifunctional real-time video acquisition and display module is connected to the first image storage module and is used to receive the video image sent by the second multifunctional real-time video acquisition and display module. The video output end of the second multifunctional real-time video acquisition and display module is connected to the remote transmitting end of the optical terminal module; the second image storage module is connected to the first multifunctional real-time video acquisition and display module and is used to receive the video image sent by the first multifunctional real-time video acquisition and display module. The method comprises the following steps: Step 1: At the far-end transmitting end of the optical terminal module, the second multifunctional real-time video acquisition and display module generates multiple video images in a continuous and gradually increasing grayscale value cycle in real time. At the same time, at the beginning of the transmission of each video image, the serial time code of the differential synchronization signal sent by the time system terminal is collected, and the serial time code is converted into N time characters, and the ASCII code values corresponding to the N time characters are used to replace the first N image data of the Lth row in the video image data. The second multifunctional real-time video acquisition and display module uses the second pulse differential signal and the 10MHz clock differential signal sent by the real-time collected time system terminal to generate a video frame signal FVAL or a video field signal Field aligned with the rising edge of the second pulse differential signal, and converts the replaced image data into a video signal in real time. , after passing through the remote transmitting end, the optical fiber and the near-end receiving end in sequence, it is sent to the first multifunctional real-time video acquisition and display module, which converts the received video signal into a frame signal FVAL, a line signal LVAL, and 8-bit image data. At the rising edge of the decoded frame signal FVAL, the serial time code of the synchronous signal of the time system terminal is collected, and the serial time code is converted into N time characters. The ASCII code values corresponding to the N time characters replace the first N image data of the Lth line in the video image data, and then sent to the second image storage module for storage; the other real-time format is converted into a cameralink video image, and then sent to the first image storage module for storage in real time; wherein, the grayscale value of the video image does not exceed 235, Step 2: Determine if there is image loss or delay The images stored in the first image storage module and the second image storage module are compared to determine whether there is image loss or delay. If there is no image loss or delay, it means that the real-time display system for long-distance transmission of PAL, HD-SDI and cameralink interface video can achieve real-time display and measurement. Otherwise, real-time display and measurement cannot be achieved.

9. The method for measuring the real-time performance of long-distance transmission of PAL, HD-SDI and CameraLink interface videos according to claim 8, characterized in that: The comparison method in step 2 is: The first image storage module and the second image storage module simultaneously store images for 30 minutes, and compare each image with the same frame number. In the two image data with the same frame number, the first N image data of the Lth row of each image are reversely converted into millisecond values and compared. If they are the same, it means there is no image loss or delay. If they are different, there is image loss or delay.

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