Digital Video Recorder, referred to as DVR is with the development of computer technology, in recent years gradually developed Video monitoring equipment. In the security industry, the traditional video monitoring project in widespread use of long delay video tape, such as a video tape storage video data using the carrier, video data using simulation, video signals stored after several times after reproduction, video tape signal attenuation occupied large storage space, maintenance and data retrieval is more troublesome. But with the development of computer technology, software and hardware technology for video data update all the store provides new ideas.

Early on the hard disk video recorder video data processing ability is not enough, so no large-scale application and current computer processing ability on one hand, also greatly enhanced IC technology is advancing by leaps and bounds for hard disk video recorder and the video signal processing multiplexing become possible.

Current hard disk video recorder mainly divided into two kinds, one kind is based on computer architecture PC hard disk video recorder (again), industrial type of hard disk video recorder based on embedded processor embedded hard disk video recorder, from the current market applications, two special, early hard disk video recorder is based on computer architecture PC hard disk video recorder, then embedded hard disk video recorder gradually increase market share, the market share of two flat.

The hard disk video recorder at home with domestic products, PC hard disk video technology is mature, but nothing brand product, more is user or engineering contractor himself, and assemble the introduction of embedded hard disk video recorder, mainly based on brand threshold higher priority. PC hard disk video recorder and can be subdivided into based on acquisition card (also called soft pressure) and compression based card (2) hard pressure card. Embedded hard disk video recorder, or technical factors in less than 16 road video input products than 16 road, the embedded products are very rare.