Four advantages of networked NVR over DVR

The current DVR system has been widely used in urban alarm monitoring and construction. Objectively speaking, DVR has created an era of digital surveillance. However, for a long time, DVRs have not solved the embarrassment of semi-analog, semi-digital, under-deployment of monitoring points, high wiring costs, and incapability of end-to-end management. At the same time as the rapid development of DVR, network video surveillance has also been leaps and bounds with the popularity of networked technologies. In order to compensate for the inadequacies of DVRs, network video surveillance systems such as NVRs and hybrid DVRs/NVRs have emerged.

1. DVR integrates five functions such as video recorder, picture splitter, pan &tilt lens control, alarm control and network transmission. As long as one device replaces the function of a bunch of devices in the previous analog monitoring system. There is also an absolute advantage in price. Technically, DVR adopts digital recording technology. Compared with analog monitoring equipment in image processing, image storage, video retrieval, data backup, remote control, and network transmission, it greatly improves work efficiency and saves material and financial resources.

2. The NVR can also be said to be a networked upgrade of the DVR. NVR is a digital and networked monitoring system. With networked front-ends, a complete set of network video surveillance systems can be built. NVRs have unmatched DVRs in terms of capacity expansion, cabling flexibility, storage management, and security. Advantage.

(1) Capacity expansion: The traditional embedded DVR system is an analog front end, and the monitoring point is interconnected with the center DVR in an analog way. Due to the influence of transmission distance and loss of analog signals, the location of the monitoring point also has great limitations. Unable to implement remote deployment. The NVR is a video monitoring system with a fully networked architecture. The monitoring point device and the NVR can be interconnected through any IP network. Therefore, the monitoring point can be located anywhere on the network and will not be subject to geographical restrictions.

(2) Wiring flexibility: The DVR adopts the first stage of simulation. Video lines, audio lines, alarm lines, and control lines must be laid between the central computer room and each monitoring point. Large quantities of work, tedious work, and high costs; relative NVR In other words, only one network cable is required for the center room to each monitoring point. The amount of work is small, the workload is small, and the cost is low. The NVR's plug-and-play network features reduce a lot of unnecessary troubles.

(3) Storage management: The DVR has powerful video recording and storage functions. However, due to the semi-digital and semi-analog products, this performance cannot be fully realized. If the previous line cannot be stored, the video data will be lost. NVR product support center stores, pre-stage storage and customer storage, etc. Once failure occurs, the system will automatically transfer to the previous stage. NVR can install large-capacity hard disk, can connect a variety of standard interfaces to meet different storage requirements. The whole network management of NVR monitoring system can realize the whole process monitoring and centralized management of transmission lines, transmission networks and all IP front-ends, including the monitoring of equipment status and the browsing of parameters; and the DVR also has its analog transmission from center to front-end. The real-time monitoring and centralized management of transmission lines and front-end equipment cannot be realized. When the front-end or line is faulty, it is inconvenient to verify the specific reasons.

(4) Security: The DVR emulates the audio and video signals transmitted in the previous stage. Without an encryption mechanism, it is easily intercepted. The NVR can use stream code encryption, user authentication, and authorization to ensure security.