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In an analog surveillance system, the use of a video server is critical. How can it be used in a matrix networked system? Using video servers and decoders can achieve the requirements of matrix networking.
In some applications, the analog monitoring system has its own advantages. Especially in the small-scale monitoring system, the limitations of the analog system are mainly the transmission distance and construction conditions, and the transmission range is less than 200M. In some specific applications, hierarchical control is needed and the system is networked. For example, the city public security integrated control system requires remote networking of each monitoring system, and the implementation of the image of the sub-monitoring system in the main control room can be called, switched and controlled.
In addition to analog monitoring systems, its application in large digital surveillance systems is even more prominent:
In large surveillance systems with more than 200 surveillance sites, such as urban security surveillance, regional surveillance, tourist attractions and other occasions. More monitoring points will have a certain impact on the bandwidth of the transmission network, especially if multiple control points access a monitoring point, it will affect the image quality.
In order to avoid this phenomenon and maximize the use of network resources, a server can be configured as a forwarding host on the control side, and the image of the monitoring point can be sent to the forwarding server. The access of the control point to the monitoring point is converted to the forwarding server. The access, thus overcoming the "clogging" of the network that occurs when multiple control points access a single monitoring point.
In the current video surveillance system, the role of network video server can not be ignored. In particular, it is very important in the application of matrix networking systems and large-scale digital surveillance systems. In the following, we will introduce you to the specific role of the video server in these two monitoring systems. The details are as follows: