A computer video display and recording integrated monitor and method

Abstract

The present invention discloses a computer video display and recording integrated display and method, which relates to the technical field of video signal processing and includes: a DVI video input interface, a VGA video input port, a DVI and VGA video distribution and selection module, a display drive control module, a liquid crystal display screen, an LED backlight drive module, a recording control module, a video recording and playback module, a hard disk memory, and a power supply module. The signal output ends of the DVI and VGA video distribution and selection module are electrically connected to the display drive control module and the video recording and playback module, and the recording control module is electrically connected to the video recording and playback module. The advantages of the present invention are as follows: by adopting the DVI and VGA video distribution and selection module, the DVI or VGA video signal is unified into a VGA signal, which is suitable for recording DVI and VGA different interface signals without the need to replace the recording and playback equipment; and the display switching and recording switching are synchronized, greatly simplifying the operation steps of display and recording synchronization.

Description

Technical Field

[0001] The present invention relates to the technical field of video signal processing, and particularly to a computer video display and recording integrated display and method. Background Art

[0002] With the rapid development of computer technology, computers are increasingly widely used. Most computer application scenarios require human-computer interaction. As an output device for human-computer interaction, a display can provide various video signal interfaces such as DVI (Digital Visual Interface) and VGA (Video Graphics Array). The DVI or VGA signal output by a computer graphics card undergoes decoding or analog-to-digital conversion, adjustment of signal parameters such as image brightness, contrast, and chromaticity, processing such as image scaling and overlay, and timing generation, and finally drives the screen to display video signals output by the computer such as graphics, images, tables, and text.

[0003] In important fields such as finance, culture and education, security protection, rights protection and law enforcement, aerospace, and military, when computer video output information is used for purposes such as post-event technical analysis, service quality evaluation, training effect inspection, or operation responsibility determination, it is necessary to save the computer video signal recording, and then retrieve the saved video file for playback display.

[0004] To achieve computer video signal recording, one technical solution is to intercept the frame image data in the memory of the computer graphics card through the API interface provided by the operating system on the computer, and then save the intercepted frame image in the form of a video stream on the disk. To reduce the amount of stored data, the intercepted image is compressed with a high compression ratio compression algorithm. This technical solution occupies a large amount of the computer's own hardware resources and requires users to perform software programming, which has high requirements for the user's technical ability. Another technical solution is to add a recording and playback device outside the computer and display system. The recording device includes using a camera to capture the screen image of the display, or using a video capture device (usually one of DVI or VGA) to capture the second video signal branched out by a video splitter, and encoding it into a video stream format with a specific compression ratio through a hardware encoder, and then storing it in a memory as a video stream file. The playback operation of both solutions is the reverse process of the recording operation, and there are also many drawbacks. Among them, the software solution seriously occupies the CPU resources of the computer and has high requirements for user skills. The hardware solution requires additional hardware, has a single video interface, and is cumbersome and inefficient in management and operation. Summary of the Invention

[0005] To solve the above technical problems, a computer video display and recording integrated monitor and method are provided. This technical solution provides a monitor and its implementation solution for computer video display, recording, playback, and export integration, solving the problems of separated computer video display and recording functions, relatively complex overall composition, and inflexible use.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A computer video display and recording integrated monitor includes: a DVI video input interface, a VGA video input port, a DVI and VGA video distribution and selection module, a display drive control module, a liquid crystal display screen, an LED backlight drive module, a recording control module, a video recording and playback module, a hard disk memory, and a power module;

[0008] Among them, the DVI and VGA video distribution and selection module has a VGA first input port, a DVI first input port, a VGA first output port, a DVI output port, and a VGA loop-out port. The DVI input port is electrically connected to the DVI video input interface, the VGA input port is electrically connected to the VGA video input port, the DVI output port is electrically connected to the display drive control module, and the VGA first output port is electrically connected to the video recording and playback module;

[0009] The display drive control module includes an LVDS port, a backlight control port, and an I / O port. The LVDS port is electrically connected to the liquid crystal display screen, the backlight control port is electrically connected to the LED backlight drive module, the signal output end of the LED backlight drive module is electrically connected to the liquid crystal display screen, and the I / O port is electrically connected to an external OSD button for receiving input signals;

[0010] The video recording and playback module includes a VGA second output port, a first serial port, a network port, and a memory port. The VGA second output port is electrically connected to the display drive control module, the network port is connected to a network interface for an external computer system to download video recording files from the network, and the memory port is electrically connected to the hard disk memory;

[0011] The recording control module includes a second serial port and an I / O input / output port. The second serial port is connected to the first serial port for sending and receiving serial port instructions, and the I / O input / output port is connected to several buttons and indicator lights for receiving on / off signals of the buttons and outputting high and low level signals to control the on / off of the indicator lights.

[0012] Preferably, the DVI and VGA video distribution and selection module includes a DVI processing unit, a VGA processing unit, and a VGA dual-channel switch;

[0013] The DVI processing unit is used to process the input DVI video signal, output an identical DVI video signal to the display driver control module for display, and at the same time convert the input DVI video signal into a VGA video signal and output it to the VGA processing unit and the VGA dual-channel switcher;

[0014] The VGA processing unit is used to process the input VGA video signal and output it to the VGA dual-channel switcher;

[0015] The VGA dual-channel switcher is used to perform switching output according to the input VGA video signal.

[0016] Preferably, the VGA processing unit includes a first three-channel operational amplifier, a second three-channel operational amplifier, and a tri-state buffer;

[0017] The first three-channel operational amplifier is used to receive the VGA1_R, VGA1_G, and VGA1_B analog signals in the VGA video signal output by the DVI processing unit, perform 2-fold gain amplification, and connect the amplified VGA_R1, VGA_G1, and VGA_B1 signals to the first-channel video signal input port of the VGA dual-channel switcher;

[0018] The second three-channel operational amplifier is used to receive the VGA2_R, VGA2_G, and VGA2_B analog signals in the VGA video signal output by the computer graphics card, perform 2-fold gain amplification, and connect the amplified VGA_R2, VGA_G2, and VGA_B2 signals to the second-channel video signal input port of the VGA dual-channel switcher;

[0019] The tri-state buffer is used to receive the VGA2_HS and VGA2_VS synchronization signals in the VGA video signal output by the computer graphics card, shape and correct the VGA2_HS and VGA2_VS synchronization signals, and output the shaped VGA_HS2 and VGA_VS2 synchronization signals and connect them to the second-channel synchronization signal input port of the VGA dual-channel switcher.

[0020] Preferably, the VGA_HS1 and VGA_VS1 synchronization signals in the VGA video signal output by the DVI processing unit are directly connected to the first-channel synchronization signal input port of the VGA dual-channel switcher.

[0021] Preferably, the switching control terminal of the VGA dual-channel switcher is connected to an I / O port of the display driving control module. When the I / O port of the display driving control module outputs a high level or a low level, the VGA dual-channel switcher correspondingly outputs the first VGA signal or the second VGA signal. Among them, the first VGA signal corresponds to the DVI video signal output by the computer graphics card, and the second VGA signal corresponds to the VGA video signal output by the computer graphics card.

[0022] Preferably, the DVI and VGA video distribution and selection module, the display driving control module, the video recording and playback module, the recording control module, the LED backlight driving module, and the liquid crystal display that provide the power required for operation are all electrically connected to the power supply module. The power supply module outputs low-voltage direct current to provide the power required for operation to the DVI and VGA video distribution and selection module, the display driving control module, the video recording and playback module, the recording control module, the LED backlight driving module, and the liquid crystal display.

[0023] Furthermore, a computer video display recording method is proposed, which is applicable to the computer video display recording integrated monitor as described above, and includes the following steps:

[0024] The computer video display recording integrated monitor is powered on and operates. The DVI and VGA video distribution and selection module collects the input DVI and VGA signals;

[0025] The DVI signal is decoded into a parallel digital signal and distributed into two paths. One path of the parallel digital signal is encoded into a DVI signal and output to the display driving control module for processing. The other path of the parallel digital signal is converted into a VGA signal and is subject to a one-out-of-two selection with the VGA signal output by the computer graphics card. The selected signal is sent to the video recording and playback module;

[0026] The display driving control module receives the DVI signal data from the DVI and VGA video distribution and selection module and receives the VGA signal from the video recording and playback module. The operator selects whether to display the DVI signal or the VGA signal on the display screen through the OSD button;

[0027] The OSD button also selects the VGA signal sent by the DVI and VGA video distribution and selection module to the video recording and playback module;

[0028] The video recording and playback module performs real-time acquisition on the VGA video signal input through its VGA port and determines whether the acquisition is successful;

[0029] When the acquisition is successful, an input status indication signal is given, and at the same time, a data copy is made of the acquired data. One copy of the data is finally output through the VGA output terminal of the video recording and playback module, and one copy of the data is encoded into a compressed video stream by the hardware encoder;

[0030] If the acquisition is unsuccessful, an indication signal of no input is given;

[0031] The operator gives a control instruction through the keys of the recording control module, and the control instruction is sent to the video recording and playback module through the interconnected first serial port and second serial port. After receiving the control instruction, the video recording and playback module performs corresponding recording operations and playback operations.

[0032] Optionally, the specific steps for the OSD key to also select the VGA signal sent by the DVI and VGA video distribution selection module to the video recording and playback module are as follows:

[0033] The operator selects whether the signal displayed on the display screen is a DVI signal or a VGA signal through the OSD key;

[0034] When the selected signal is a DVI signal, the I / O port connected to the switching control terminal of the VGA dual-channel switch by the display driver control module outputs a high level, and the VGA dual-channel switch outputs the first VGA signal;

[0035] When the selected signal is a VGA signal, the I / O port connected to the switching control terminal of the VGA dual-channel switch by the display driver control module outputs a low level, and the VGA dual-channel switch outputs the second VGA signal.

[0036] Optionally, the recording operation specifically includes the following steps:

[0037] After the video recording and playback module 8 receives the recording instruction, it first detects the input status. If there is no input, the recording is stopped;

[0038] If there is input, the hardware encoder encapsulates the compressed video stream;

[0039] The encapsulated video data is stored in the hard disk memory in the form of a file.

[0040] Optionally, the playback operation specifically includes the following steps:

[0041] The operator sends a playback instruction through the keys on the recording control module, and the video recording and playback module controls the VGA second output port to output a file index list interface;

[0042] The file system management system of the video recording and playback module updates the file index on the hard disk memory and configures the file reading and playing program;

[0043] The file reading and playing program reads the video file selected by the operator, decodes and plays it;

[0044] Using the FTP function of the built-in operating system of the video recording and playback module, connect to the network port, and the external computer system performs a download operation to retrieve the video file.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0046] The present invention proposes an integrated solution for computer video display and recording, which does not occupy computer resources and greatly simplifies the implementation of computer video recording requirements;

[0047] This solution adopts a DVI and VGA video distribution and selection module to unify DVI or VGA video signals into VGA signals, which is suitable for recording different interface signals of DVI and VGA, and there is no need to replace the recording and playback equipment;

[0048] This solution realizes the synchronization of display switching and recording switching. When displaying the DVI signal, the DVI signal is converted into a VGA signal and sent to the video recording and playback module. When displaying the VGA signal, a copy of the VGA signal is sent to the video recording and playback module, thus greatly simplifying the operation steps of display and recording synchronization. Description of the Drawings

[0049] Figure 1 It is the block diagram of the composition structure of the integrated computer video display and recording monitor proposed by this solution;

[0050] Figure 2 It is the circuit diagram of the integrated computer video display and recording monitor proposed by this solution;

[0051] Figure 3 It is the flowchart of the integrated computer video display and recording method proposed by this solution;

[0052] Figure 4 It is the flowchart of the switching method for the DVI and VGA video distribution and selection module in this solution to output DVI signals or VGA signals;

[0053] Figure 5 It is the flowchart of the recording operation in this solution;

[0054] Figure 6 It is the flowchart of the playback operation in this solution.

[0055] The reference numerals in the figure are:

[0056] 1. DVI video input interface; 2. VGA video input port; 3. DVI and VGA video distribution and selection module; 4. Display drive control module; 5. Liquid crystal display screen; 6. LED backlight drive module; 7. Recording control module; 8. Video recording and playback module; 9. Hard disk memory; 10. Power supply module. Detailed implementation

[0057] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0058] Refer to Figure 1-2 As shown, a computer video display and recording integrated display includes: DVI video input interface 1, VGA video input port 2, DVI and VGA video distribution and selection module 3, display drive control module 4, liquid crystal display screen 5, LED backlight drive module 6, recording control module 7, video recording and playback module 8, hard disk memory 9 and power supply module 10;

[0059] Among them, the DVI and VGA video distribution and selection module 3 has a VGA first input port, a DVI first input port, a VGA first output port, a DVI output port and a VGA loop-out port. The DVI input port is electrically connected to the DVI video input interface 1, the VGA input port is electrically connected to the VGA video input port 2, the DVI output port is electrically connected to the display drive control module 4, and the VGA first output port is electrically connected to the video recording and playback module 8;

[0060] The display drive control module 4 includes an LVDS port, a backlight control port and an I / O port. The LVDS port is electrically connected to the liquid crystal display screen 5, the backlight control port is electrically connected to the LED backlight drive module 6. The display drive control module sends an EN (enable) signal and a PWM (pulse width modulation) signal to the LED backlight drive module 6. The signal output end of the LED backlight drive module 6 is electrically connected to the liquid crystal display screen 5 to control the LED emission brightness in the liquid crystal display screen 5. The I / O port is electrically connected to an external OSD button for receiving input signals;

[0061] The video recording and playback module 8 includes a second VGA output port, a first serial port, a network port, and a memory port. The second VGA output port is electrically connected to the display driver control module 4 to transmit the VGA video output signal generated by the video recording and playback module 8 to the display driver control module 4. The network port is connected to a network interface for an external computer system to download video recording files from the network. The memory port is electrically connected to the hard disk memory 9 to store the encapsulated video data in the form of files into the hard disk memory 9. When the user needs to playback the recorded video, the video recording and playback module 8 outputs a file list interface and a playback video signal to the display driver control module 4 through the second VGA output port;

[0062] The recording control module 7 includes a second serial port and an I / O input / output port. The second serial port is connected to the first serial port for sending and receiving serial port instructions. The I / O input / output port is connected to several buttons and indicator lights for receiving on / off signals of the buttons and outputting high and low level signals to control the on / off of the indicator lights;

[0063] The DVI and VGA video distribution selection module 3, the display driver control module 4, the video recording and playback module 8, the recording control module 7, the LED backlight driving module 6, and the liquid crystal screen 5 are all electrically connected to the power supply module 10. The power supply module 10 outputs low-voltage direct current to provide the power required for the operation of the DVI and VGA video distribution selection module 3, the display driver control module 4, the video recording and playback module 8, the recording control module 7, the LED backlight driving module 6, and the liquid crystal screen 5.

[0064] The DVI and VGA video distribution selection module 3 includes a DVI processing unit, a VGA processing unit, and a VGA dual-channel switch;

[0065] The DVI processing unit is used to process the input DVI video signal, output a same DVI video signal to the display driver control module 4 for display, and at the same time convert the input DVI video signal into a VGA video signal and output it to the VGA processing unit and the VGA dual-channel switch;

[0066] The VGA processing unit is used to process the input VGA video signal and output it to the VGA dual-channel switch;

[0067] The VGA dual-channel switch is used to switch and output according to the input VGA video signal. The switching control terminal of the VGA dual-channel switch is connected to an I / O port of the display driving control module 4. When the I / O port of the display driving control module 4 outputs a high level or a low level, the VGA dual-channel switch correspondingly outputs the first VGA signal or the second VGA signal. Among them, the first VGA signal corresponds to the DVI video signal output by the computer graphics card, and the second VGA signal corresponds to the VGA video signal output by the computer graphics card.

[0068] Among them, the VGA processing unit includes a first three-channel operational amplifier, a second three-channel operational amplifier, and a tri-state buffer;

[0069] The first three-channel operational amplifier is used to receive the VGA1_R, VGA1_G, and VGA1_B analog signals in the VGA video signal output by the DVI processing unit, perform 2-fold gain amplification, and connect the amplified VGA_R1, VGA_G1, and VGA_B1 signals to the first video signal input port of the VGA dual-channel switch;

[0070] The second three-channel operational amplifier is used to receive the VGA2_R, VGA2_G, and VGA2_B analog signals in the VGA video signal output by the computer graphics card, perform 2-fold gain amplification, and connect the amplified VGA_R2, VGA_G2, and VGA_B2 signals to the second video signal input port of the VGA dual-channel switch;

[0071] The tri-state buffer is used to receive the VGA2_HS and VGA2_VS synchronization signals in the VGA video signal output by the computer graphics card, shape and correct the VGA2_HS and VGA2_VS synchronization signals, and output the shaped VGA_HS2 and VGA_VS2 synchronization signals to be connected to the second synchronization signal input port of the VGA dual-channel switch;

[0072] The VGA_HS1 and VGA_VS1 synchronization signals in the VGA video signal output by the DVI processing unit are directly connected to the first synchronization signal input port of the VGA dual-channel switch.

[0073] The VGA_R1, VGA_G1, VGA_B1 signals and the VGA_HS1, VGA_VS1 synchronization signals form the first VGA signal;

[0074] The VGA2_R, VGA2_G, VGA2_B signals and the VGA_HS2, VGA_VS2 synchronization signals form the second VGA signal.

[0075] The display driving control module 4 further includes a second DVI input port, a second VGA input port, and a highly integrated video processor. One end of the second DVI input port is connected to the DVI video converter, and the other end is connected to the video processor; one end of the second VGA input port is connected to the video recording module 500, and the other end is connected to the video processor; one end of some I / O ports is connected to multiple OSD buttons, and the other end is connected to the video processor; one end of some I / O ports is connected to the LED backlight driving module 6, and the other end is connected to the video processor; one end of another I / O port is connected to the VGA dual-channel switch, and the other end is connected to the video processor; one end of the LVDS port is connected to the video processor, and the other end is connected to the liquid crystal screen 5. The video processor is configured to receive external video signals and perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, image synthesis, display formatting, etc. according to the standard encoding and decoding protocols of the input signals, and signals that can be directly displayed on the liquid crystal screen 5 can be obtained. The user inputs operations such as display switching, screen brightness adjustment, and display screen on / off through the OSD buttons. The microcontroller built into the video processor receives the button information and correspondingly outputs I / O signals to control the LED backlight driving module 6 and the VGA dual-channel switch.

[0076] Please refer to Figure 3 As shown, further, in combination with the above computer video display and recording integrated display, a computer video display and recording method is proposed, including the following steps

[0077] The computer video display and recording integrated display is powered on and works. The DVI and VGA video distribution and selection module collects the input DVI and VGA signals;

[0078] The DVI signal is decoded into parallel digital signals and distributed into two paths. One path of the parallel digital signals is encoded into DVI signals and output to the display driving control module for processing, and the other path of the parallel digital signals is converted into VGA signals and one of the VGA signals output by the computer graphics card is selected through a one-for-two selection, and the selected signal is sent to the video recording and playback module;

[0079] The display driving control module receives the DVI signal data from the DVI and VGA video distribution and selection module and the VGA signal from the video recording and playback module. The operator selects whether to display the DVI signal or the VGA signal on the display screen through the OSD buttons;

[0080] The OSD buttons also select the VGA signal sent by the DVI and VGA video distribution and selection module to the video recording and playback module;

[0081] The video recording and playback module performs real-time acquisition of the VGA video signal input from its VGA port and determines whether the acquisition is successful;

[0082] When the acquisition is successful, an input status indication signal is given, and at the same time, a data copy is made of the acquired data. One copy of the data is finally output through the VGA output terminal of the video recording and playback module, and one copy of the data is encoded into a compressed video stream by the hardware encoder.

[0083] If the acquisition is unsuccessful, an indication signal of no input is given.

[0084] The operator gives control instructions through the keys of the recording control module, and the control instructions are sent to the video recording and playback module through the interconnected first serial port and second serial port. After receiving the control instructions, the video recording and playback module performs corresponding recording operations and playback operations.

[0085] Please refer to Figure 4 As shown, the specific steps for the OSD key to select the VGA signal sent by the DVI and VGA video distribution selection module to the video recording and playback module are as follows:

[0086] The operator selects whether the signal displayed on the display screen is a DVI signal or a VGA signal through the OSD key.

[0087] When the selected signal is a DVI signal, the I / O port connected to the switching control terminal of the VGA dual-channel switch by the display driver control module outputs a high level, and the VGA dual-channel switch outputs the first VGA signal.

[0088] When the selected signal is a VGA signal, the I / O port connected to the switching control terminal of the VGA dual-channel switch by the display driver control module outputs a low level, and the VGA dual-channel switch outputs the second VGA signal.

[0089] Please refer to Figure 5 As shown, the recording operation specifically includes the following steps:

[0090] After the video recording and playback module 8 receives the recording instruction, it first detects the input status. If there is no input, the recording stops.

[0091] If there is input, the hardware encoder encapsulates the compressed video stream into a recording file. The recording file can be in video file formats such as TS (Transport Stream). It is also possible to perform compression processing on the recording file to reduce the demand for storage space. For example, the generated recording file can be further converted into video file formats such as mp4 (Moving Picture Experts Group 4), avi (Audio Video Interleaved), etc.

[0092] The encapsulated video data is stored in the hard disk memory in the form of a file.

[0093] Please refer toFigure 6 As shown in the figure, the playback operation specifically includes the following steps:

[0094] The operator sends a playback instruction through the keys on the recording control module, and the video recording and playback module controls the VGA second output port to output the file index list interface;

[0095] The file system management system of the video recording and playback module updates the file index on the hard disk memory and configures the file reading and playing program;

[0096] The file reading and playing program reads the video file selected by the operator and decodes and plays it;

[0097] Using the FTP function of the built-in operating system of the video recording and playback module, connect to the network port, and the external computer system performs a download operation to retrieve the video file.

[0098] In summary, the advantages of the present invention are as follows: The DVI and VGA video distribution and selection module is adopted to unify the DVI or VGA video signal into a VGA signal, which is suitable for recording DVI and VGA different interface signals without the need to replace the recording and playback equipment; and the display switching and recording switching are synchronized, greatly simplifying the display and recording synchronization operation steps.

[0099] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated display for computer video display and recording, characterized in that Including: A DVI video input interface (1), a VGA video input port (2), a DVI and VGA video distribution and selection module (3), a display drive control module (4), a liquid crystal display screen (5), an LED backlight drive module (6), a recording control module (7), a video recording and playback module (8), a hard disk memory (9), and a power supply module (10); Among them, the DVI and VGA video distribution and selection module (3) has a VGA first input port, a DVI first input port, a VGA first output port, a DVI output port, and a VGA loop-out port. The DVI first input port is electrically connected to the DVI video input interface (1), the VGA first input port is electrically connected to the VGA video input port (2), the DVI output port is electrically connected to the display drive control module (4), and the VGA first output port is electrically connected to the video recording and playback module (8); The display drive control module (4) includes an LVDS port, a backlight control port, and an I / O port. The LVDS port is electrically connected to the liquid crystal display screen (5), the backlight control port is electrically connected to the LED backlight drive module (6), the signal output end of the LED backlight drive module (6) is electrically connected to the liquid crystal display screen (5), and the I / O port is electrically connected to an external OSD button for receiving input signals; The video recording and playback module (8) includes a VGA second output port, a first serial port, a network port, and a memory port. The VGA second output port is electrically connected to the display drive control module (4), the network port is connected to a network interface for an external computer system to download video recording files from the network, and the memory port is electrically connected to the hard disk memory (9); The recording control module (7) includes a second serial port and an I / O input / output port. The second serial port is connected to the first serial port for sending and receiving serial port instructions. The I / O input / output port is connected to several buttons and indicator lights for receiving on / off signals of the buttons and outputting high and low level signals to control the on and off of the indicator lights; The DVI and VGA video distribution and selection module (3) includes a DVI processing unit, a VGA processing unit, and a VGA dual-channel switch; The DVI processing unit is used to process the input DVI video signal, output the same DVI video signal to the display drive control module (4) for display, and at the same time convert the input DVI video signal into a VGA video signal and output it to the VGA processing unit and the VGA dual-channel switch; The VGA processing unit is used to process the input VGA video signal and output it to the VGA dual-channel switch; The VGA dual-channel switch is used to switch and output according to the input VGA video signal.

2. The integrated display for computer video display and recording according to claim 1, characterized in that, The VGA processing unit includes a first three-channel operational amplifier, a second three-channel operational amplifier, and a tri-state buffer; The first three-channel operational amplifier is used to receive the VGA1_R, VGA1_G, and VGA1_B analog signals in the VGA video signal output by the DVI processing unit, perform 2-fold gain amplification, and connect the amplified VGA_R1, VGA_G1, and VGA_B1 signals to the first video signal input port of the VGA dual-channel switcher; The second three-channel operational amplifier is used to receive the VGA2_R, VGA2_G, and VGA2_B analog signals in the VGA video signal output by the computer graphics card, perform 2-fold gain amplification, and connect the amplified VGA_R2, VGA_G2, and VGA_B2 signals to the second video signal input port of the VGA dual-channel switcher; The tri-state buffer is used to receive the VGA2_HS and VGA2_VS synchronization signals in the VGA video signal output by the computer graphics card, shape and correct the VGA2_HS and VGA2_VS synchronization signals, and output the shaped VGA_HS2 and VGA_VS2 synchronization signals to the second synchronization signal input port of the VGA dual-channel switcher.

3. The integrated display for computer video display and recording according to claim 2, wherein, The VGA_HS1 and VGA_VS1 synchronization signals in the VGA video signal output by the DVI processing unit are directly connected to the first synchronization signal input port of the VGA dual-channel switcher.

4. The integrated display for computer video display and recording according to claim 3, characterized in that, The switching control terminal of the VGA dual-channel switcher is connected to an I / O port of the display drive control module (4). When the I / O port of the display drive control module (4) outputs a high level or a low level, the VGA dual-channel switcher correspondingly outputs the first VGA signal or the second VGA signal. Among them, the first VGA signal corresponds to the DVI video signal output by the computer graphics card, and the second VGA signal corresponds to the VGA video signal output by the computer graphics card.

5. The integrated computer video display and recording monitor according to claim 1, characterized in that, The DVI and VGA video distribution and selection module (3), the display drive control module (4), the video recording and playback module (8), the recording control module (7), the LED backlight drive module (6), and the liquid crystal screen (5) are all electrically connected to the power supply module 10. The power supply module 10 outputs low-voltage direct current to provide the power required for the operation of the DVI and VGA video distribution and selection module (3), the display drive control module (4), the video recording and playback module (8), the recording control module (7), the LED backlight drive module (6), and the liquid crystal screen (5).

6. A computer video display recording method, applicable to the computer video display recording integrated monitor as described in any one of claims 1-5, characterized in that, Including the following steps: When the computer video display recording integrated monitor is powered on and working, the DVI and VGA video distribution and selection module collects the input DVI and VGA signals; The DVI signal is decoded into a parallel digital signal and distributed into two paths. One of the parallel digital signals is encoded into a DVI signal and output to the display drive control module for processing. The other parallel digital signal is converted into a VGA signal and a VGA signal output by the computer graphics card are selected through a one-of-two selection, and the selected signal is sent to the video recording and playback module; The display drive control module receives DVI signal data from the DVI and VGA video distribution selection module, and receives VGA signals from the video recording and playback module. The operator selects whether to display the DVI signal or the VGA signal on the display screen through the OSD buttons; The OSD buttons also select the VGA signals sent by the DVI and VGA video distribution selection module to the video recording and playback module; The video recording and playback module performs real-time acquisition of the VGA video signals input through its VGA port and determines whether the acquisition is successful; If the acquisition is successful, an input status indication signal is given. At the same time, a data copy of the acquired data is made. One copy of the data is finally output through the VGA output terminal of the video recording and playback module, and one copy of the data is encoded into a compressed video stream by the hardware encoder; If the acquisition is not successful, an indication signal of no input is given; The operator gives control instructions through the buttons of the recording control module. The control instructions are sent to the video recording and playback module through the interconnected first serial port and second serial port. After receiving the control instructions, the video recording and playback module performs corresponding recording operations and playback operations.

7. The computer video display recording method according to claim 6, wherein The specific steps for the OSD buttons to also select the VGA signals sent by the DVI and VGA video distribution selection module to the video recording and playback module are as follows: The operator selects whether to display the DVI signal or the VGA signal on the display screen through the OSD buttons; When the selected signal is the DVI signal, the I / O port connected to the switching control terminal of the VGA dual-channel switch of the display drive control module outputs a high level, and the VGA dual-channel switch outputs the first VGA signal; When the selected signal is the VGA signal, the I / O port connected to the switching control terminal of the VGA dual-channel switch of the display drive control module outputs a low level, and the VGA dual-channel switch outputs the second VGA signal.

8. The computer video display recording method according to claim 7, wherein The specific recording operation includes the following steps: After receiving the recording instruction, the video recording and playback module (8) first detects the input status. If there is no input, the recording is stopped; If there is input, the hardware encoder encapsulates the compressed video stream; The encapsulated video data is stored in the hard disk memory in the form of a file.

9. The computer video display recording method according to claim 8, characterized in that, The specific playback operation includes the following steps: The operator sends a playback instruction through the buttons on the recording control module. The video recording and playback module controls the VGA second output port to output a file index list interface; The file system management system of the video recording and playback module updates the file index on the hard disk memory and configures the file reading and playing program; The file reading and playing program reads the video file selected by the operator, decodes and plays it; Using the FTP function of the built-in operating system of the video recording and playback module, connect to the network port, and the external computer system performs a download operation to retrieve the video file.

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