NVR or DVR? Why market choices are so entangled

In recent years, with the continuous development of China's network technology, the field of security monitoring has entered the era of full network. In the increasing popularity of monitoring and networking, as an important part of network monitoring: NVR, it has gradually become an important part of the entire network equipment.

The full name of the NVR is the Network Video Recorder, which we often refer to in the security monitoring network video recorder, and its core features must also focus on its network function, that is, its network characteristics. In the entire system architecture, the network camera and video encoder are located at the front of the device. The analog video and audio signals received by the system through the camera are digitized by the encoder and transmitted to the NVR in the form of IP streams. The NVR then performs centralized video storage, management, and forwarding. Based on the work characteristics of NVR, it is destined to have more flexible working characteristics. Therefore, it is not restricted by the physical location in the network and can be deployed on demand according to the environment.

The difference between NVR and DVR Speaking of NVR, you may naturally think of DVR as the "old man" of NVR. Compared with DVRs, although they belong to the same family, they differ in their work environment because of their differences:

The first difference in the work environment is the difference in work methods. In the traditional DVR system, since the monitoring center and the DVR use analog connections, the connection mode is easy to increase with the transmission distance. Loss of analog signal. This feature also predestined the DVR's limitations in the manageable range, so it is also often confined to smaller analog surveillance systems in the surveillance area. NVR as a monitoring system of the entire network architecture, you can break through the ip network to break geographical restrictions, appear in the place where it should appear.

In addition, on the independence of the work, the DVR can independently obtain, compress, store and manage the video for self-contained system work, while the NVR must cooperate with the front camera and dvs to achieve normal work.

One of the most important functions of different DVR devices for storage functions in our applications is their powerful recording and storage capabilities. However, due to its limited overall work pattern, DVRs are more of a role of "waiting for signals" at the back end. Once the front line or equipment fails, it is very easy to cause signals to be transmitted to the DVR. Loss of storage. For NVR devices, because of the overall structure of the system, the NVR can support any one of the front-end, central control, and client-side three-point storage, and when the system does not work properly, the NVR can automatically complete the central control and front-end. Back up each other. Therefore, once the system fails, it will not cause data loss. This is also more prominent than DVR equipment.

Differences in Management and Maintenance Compared to DVR devices, the management capability of the entire network of NVR devices is undoubtedly one of the few bright spots. In the management, NVR equipment can smoothly realize the monitoring and management of transmission lines, transmission networks and all network front-end equipment, including the working status of the equipment. For DVR devices, because the center-to-front-end is also a characteristic of analog transmission, it is difficult to achieve unified management of devices and circuits in the overall system, not to mention the monitoring capabilities of the devices, so the management of the devices still brings Lots of inconvenience.

In addition, the NVR is also simpler than the DVR circuit in the wiring of the device.

The difference in security has always been the focus of attention for the security of video surveillance. In the management of video security, NVR has a fairly complete measure of encryption or authentication. This is undoubtedly more secure than the “dashing” in the signal transmission process of the DVR device. Perhaps the management scope of the DVR is relatively small, so the security risk borne by the device is also relatively small, but for the NVR working through the network, This protection is even more necessary.

Can NVR really replace DVR?

Relative to the application of NVR, many people in China may be at a relatively early stage of his understanding, but abroad, NVR products have begun to be widely used in some security industries, or in the high-end areas related to the security industry. Although with the improvement of the network environment and the increasing attention paid to network monitoring in the past two years, some domestic analysts have taken a very positive attitude towards the NVR and even believe that the NVR will largely replace the DVR in the next few years. But in fact, in the entire network monitoring market, the application of NVR is far less optimistic than everyone's estimation. The NVR is still in a very slow development period. Can NVR equipment really successfully replace DVR? In the process of popularization, what resistance does it face?

Since China's security monitoring has gradually entered the Internet era, networked products must focus not only on pushing their own technological advances, but also on how to find a place in the current limited network environment. However, today's networked devices must compete for analog surveillance and are destined to make major breakthroughs in transmission quality. The current situation is that although NVR products have obvious advantages in most small businesses, if they are to be used in large-scale projects, the bottleneck of network transmission will be manifested in a large area. Actually, it is not only NVR products. This problem is also close. In recent years, the entire network monitoring market has been in a headache.

Technically speaking, we have also conducted specific analysis before. Although NVR and DVR differ only by one letter in their names, they are essentially different. The "D" in the DVR mainly involves encoding and storage technologies, while the "N" in the NVR more indicates the network and transmission. Therefore, the difference in the main direction makes these two technologies have many different places in the fusion. Especially in some relatively complete monitoring system transformation, the change of the two systems will bring huge projects to the construction. Therefore, the complexity of the transformation also puts the NVR’s “listing” faced with considerable resistance.

It can be said that, as a whole, NVR has inherited many inherent advantages of DVR, but also has a brighter development space than everyone has recognized. However, we still cannot ignore the fact that the DVR itself has not stopped its own development and is constantly advancing with the times. In addition, DVRs are still more accessible to people than NVRs in terms of popularization of the current simulation system, system modification, and equipment price. This is doomed DVR will not easily let the market to the NVR in a short time.

In fact, in my opinion, the problems facing the current NVR market are actually problems faced by the network surveillance market as a whole. The insufficiency of the transmission environment, the vastness of the system renovation project, and the factors of understanding are all factors that hinder the popularity of network monitoring. As an important device in network monitoring, it is inevitable that NVRs are affected by these. Therefore, just like the competition between network and simulation, the contest between DVR and NVR will continue for a long time, although NVR has a broad development prospect. However, it is unrealistic to expect NVR to replace DVR independently. As part of the overall system, I am afraid that only when the network monitoring completely defeats the analog surveillance can we say that the NVR has completely pushed the DVR out of the altar.