DVR system is a semi-digital system. The main principle of DVR technology is to use the computer's high-speed data processing capabilities to collect, process, and store video, and to use the high resolution of the monitor to achieve multi-screen display of images. The traditional analog DVR monitoring system uses DVR to complete the storage of video information and display on the monitor screen. In some security monitoring rooms, analog torch arrays are often used to switch the video on the screen wall monitor through the analog matrix.