The NVR technology application function mode is more flexible and can meet the functional requirements of today’s video surveillance system to a large extent. The small-scale NVR solution with NVR technology as the core has the advantages of small scale, flexible operation, convenient use, economical and practical, etc. Its front end mainly cooperates with high-definition video cameras to support 8-channel 720P high-definition video image access, and then realizes high-definition through NVR technology Centralized management and real-time storage of video image information. In addition, this small NVR solution can also support functions such as remote management of video images, preview and analysis of video images, and real-time upload of video image data through a gigabit Ethernet port, local preview, and video recording playback. The small NVR high-definition video solution has a high overall cost-effectiveness, simple system and high operational flexibility. This small NVR high-definition video surveillance system is widely used in the field of centralized video surveillance in small areas such as companies, factories, family villas, offices, shops, and supermarkets.
The further increase in the functional requirements of the high-definition video surveillance system requires the video surveillance system to have the technical performance of expansion, cascade, and standard ONVIF communication protocol. Through NVR equipment, high-definition cameras of different manufacturers and different brands at the front end of the video surveillance system can be organically interconnected, so that a unified functional integrated local area network can be built through the NVR, so as to realize the NVR cascade, expansion and large-capacity storage in the video surveillance system. In addition, a centralized advanced application management technology platform is built on the back end through NVR extension, which can manage and configure the NVR equipment group in a unified manner to realize regional multi-user forwarding and various application function services (forwarding/management server group) , Including: forwarding server, management server, storage database, on-demand server, and client advanced application software and other functional modules. Medium-sized NVR high-definition video systems are usually used in medium-sized high-definition video surveillance projects with less than 1,000 channels. The advantage is that NVR can realize distributed layout and centralized storage, and its operation stability is high. The back-end technology platform performs unified management and application. Able to achieve multi-user multi-level integrated unified application services. The secondary medium network is mainly based on the urban video surveillance architecture of the district, county or prefecture-level city. It realizes the storage of video image data and the centralized communication management of the access front-end equipment through the NVR, thereby realizing the storage of the front-end high-definition camera video recording , Management, client video image preview, local decoding on the wall and other service application functions. At the same time, through the authorization of the provincial first-level video monitoring center, the preview, control and sharing of video image information between users of different levels can be realized. It fully meets the normal video surveillance function requirements of safe cities for secondary users in cities such as prefectures, counties, and cities.