With the advancement of technology and the popularization of surveillance systems, network surveillance has gradually become the mainstream surveillance system. The second-generation digital surveillance camera video surveillance system is currently the mainstream video surveillance system, with its high-definition and low-light capabilities and storage and inspection. Convenience has allowed its development and popularity to grow rapidly. Now with the continuous advancement of network technology, the third-generation video surveillance system's all-digital network video surveillance has begun to run into the field. The biggest advantage of network video surveillance is that it does not require wiring and is convenient to maintain. At the same time, with the improvement of technology, the effect can be achieved to the level of the second-generation digital video surveillance. In actual work, we implement network monitoring and network transmission according to the actual work. The way to divide the network video surveillance system into four types:
The first is a combined network remote monitoring system using analog surveillance cameras + digital hard disk recorders + video servers
Since pure network video surveillance is not technically enough to achieve satisfactory results, the combined network remote monitoring system using analog surveillance cameras + digital hard disk video recorders + video servers has become the mainstream. Set up ports, gateways and routes in the local area network, and use the video server inside the digital hard disk video recorder as a browsing signal source, so that users can see the environment they want to monitor and record videos thousands of miles away. In this way, the analog surveillance camera still needs to be wired, and it is difficult to invest in maintenance.
The second is to directly use analog camera + video server + network system
The analog video signal of the camera is converted into a digital signal through the video server, and then compressed and encoded. After the output, the web page that can be browsed is provided to the video server, so that you can view it by inputting the IP address in any computer on the local area network Monitor the picture and perform control operations such as zooming, zooming, and rotating the camera. If you use dynamic domain name resolution, you can also realize that the video signal in the local area network can be viewed thousands of miles away.
The third is the way of network camera + network system
The current network camera is actually a camera integrated with a video server. Through the built-in analog/digital conversion and video server functions, network communication and data transmission can be realized. It can be used directly by plugging in the Internet cable. This is the most current home network camera. The main way.
The fourth type is a video surveillance system using 3G wireless networks
The high speed of 3G network makes it possible for mobile phone remote video monitoring. The camera image is compressed by the video compression coding module, and then the 3G wireless module is used to realize the interaction of video data, sending/receiving, encryption and decryption, coding and decoding, link control and maintenance, etc. Function, real-time transmission of dynamic images to the 3G communication network, so that customers can use the wireless 3G network to remotely view the scene no matter where they are. This provides convenience for multiple applications such as remote monitoring and remote visits.
