NVR's main function is to receive through the network IPC (Network Camera) equipment transmission of digital video stream, and storage, management, enabling the network to bring the advantages of a distributed architecture. In simple terms, through the NVR can watch, browse, play, manage, store multiple network cameras. It got rid of the computer hardware to tie him down, users no longer have to face the tedious installation of software. If all of the surveillance cameras network, then the emergence of a centralized management of the core is a must. NVR also be said that a network upgrade DVR, NVR is digital, network monitoring system, with a network of front to build a fully functional network video surveillance system, NVR unparalleled in all aspects of advantage.

Capacity expansion, many projects are divided into many of completion, NVR only be able to point transmission and front-end remote monitoring via the network, and expand the existing NVR can be achieved through network technology, so whether it is added to the system or NVR extensions are very easy; compatibility, now ONVIF protocol requires continuous improvement, almost all manufacturers have support ONVIF protocol, which is the basis for solving the problem NVR is compatible withIPCamera. Of course, in the short term ONVIF can not perfect, still needs to be improved over time, so the next few years, is still the most difficult period of development NVR, NVR manufacturers also need to keep an open mind and a positive attitude, while using RTSP, HTTP, ONVFI other agreements with the IPC home docking; access and forwarding, cameras are bound to develop in the direction toward HD NVR will cause bandwidth pressure, and now not only solve the access problem NVR cameras, and even better to complete the forwarding feature that allows more users while browsing with a front-end, and now a common access NVR can reach hundreds of megabytes and megabytes, while forwarding; large stockpile management, mass data storage is bound to need a lot of wire, for room space is also a great challenge . For NVR, the center room to each monitoring point requires only one cable is solved, engineering, work less, the cost is low, the whole network management NVR surveillance system enables the transmission line, the transmission network as well as all IP front of the whole monitoring and centralized management, including monitoring of equipment status and parameters of browsing; safety, storage DVR era of relatively large risk, because the front-end and back-end is completely connected via fixed video cable, video cable if there are problems replace it quite difficult, and ultimately will lead to stop storing data. And almost no measures to protect the video, DVR stored video can be easily acquire others, now you can not only NVR RAID, hot standby, N + 1 and other techniques to protect against loss of data storage, but also video through encryption and user authentication authority to prevent the disclosure of technical data processing; cloud storage appear to break the limitations of conventional storage, centralized cloud storage is not so much a technology as it is a service that can share resources, you can second-class transportation scheduling, cloud storage network in a large variety of different types of storage devices through software applications together to work together to provide a system of external data storage and business access functions. With the improvement of network technology and bandwidth, cloud storage in video surveillance more broad prospects; With advances in technology, NVR is no longer a simple storage device, and it is sometimes also necessary as a surveillance system core, it requires not only manage the front of the device also needs to see real-time monitoring screen, you also need fast and efficient treatment in the event of unusual circumstances. Much higher in price and no case, so that more intelligent NVR through a series of technical innovation and experience innovation, so that new applications can bring experience to the user, this innovation is necessary should be better.

In summary NVR security in the following areas have outstanding advantages: convenience deployed to achieve the cost reduction and management and use; high-capacity integrated, smaller, more storage space; NVR effective transport network to reduce interference , better quality assurance of image transmission; higher performance, in the case of multiple concurrent write, with better bandwidth, data management and caching capabilities; centralized management, mass storage devices due to the need to effectively manage them, right end-user to provide convenient, reliable, and transparent support. NVR say enough, that is, NVR will be affected by network bandwidth limitations, and there will be network latency phenomenon, I believe that in the near future, these problems will be solved.