With the development of chip technology, higher performance CPU makes DVR faster and more powerful. From the early CIF hard disk video recorder, D1 hard disk video recorder, 960h hard disk video recorder, hybrid hard disk video recorder, HD-SDI hard disk video recorder. In addition, with the trend of high definition, the demand for storage is also increasing, and the DVR hard disk management technology is also improving. Basically, DVR may support more hard disk interfaces, support RAID technology, and support the compatibility of DAS, San, NAS and other storage technologies.

The mainstream DVR compression technologies on the market include MPEG-4, H.264 and M-JPEG. MPEG-4 and H.264 are the most common compression methods in China, and H.264 has become the mainstream because it is more suitable for network transmission. In order to make embedded DVR more widely applicable in the future, the unification of various algorithms will be the trend of future development. However, this unification does not take the standard of any domestic enterprise as the standard, but requires the extensive participation of a wide range of government functional departments and various enterprises in the DVR industrial chain. For example, China's AVS compression algorithm with independent intellectual property rights and h.265 compression algorithm have revolutionary changes in many aspects compared with H.264.

3. Intelligence is an important development direction
From a technical point of view, intelligence is an important development direction. Only through intelligent analysis technology for video information management can people's work be freed from complex affairs. In fact, the functions of real-time monitoring engineering, early warning, information processing and retrieval all need the application of intelligent technology. Although it is difficult to fully realize the management of intelligent analysis technology in a short time, the technology can realize semi-automatic monitoring engineering intelligence to some extent. In most cases, the use of intelligent analysis technology can complete most of the work, and the staff can focus on management and coordinated processing, which is a better application mode at this stage. In terms of intelligence, the market demand is very strong. Many manufacturers have launched DVR with intelligent analysis technology. At present, the best intelligent analysis technology does not have 100% accuracy, and great breakthroughs and progress are needed in technology to meet the application of the market.