The history of DVRs

DVR is a video surveillance device that has gradually developed in recent years with the development of computer technology. In the security industry, tape-based long-delay video recorders are commonly used in traditional video surveillance projects. These video recorders use tape as a carrier for storing video data. Video data is stored in an analog manner. After repeated copying of the video signal, the signal attenuation is severe. Video tapes take up a lot of storage space, and maintenance and data retrieval are troublesome. With the development of computer technology, hardware and software technology updates provide new ideas for the storage of video data. Due to technical factors, embedded DVRs are still dominated by products with less than 16 channels of video input, and embedded products higher than 16 channels are rare.