Now the design institute design closed-circuit monitoring, how to still use analog monitoring ah?
The difference between analog monitoring and digital monitoringIn accordance with the principle of economic application and stability, designers of design institutes recommend the use of analog signal monitoring system. Simulation monitoring is to generate analog signals, through the acquisition card or hard disk recorder converts analog signals into digital signals stored, or by the more primitive way is through the video and other media to store it.
Relatively, the analog monitor produces pictures that are clear, but digital monitoring is relatively compressed or processed by analog monitoring, and the image is slightly worse. And a codec cheaper than one thousand yuan, expensive three thousand multivariate, but with the digital technology more mature, the advantages of digital monitoring is more and more prominent. Digital monitoring is one of the world's leading products new and most leading position, it makes the monitoring field from digital simulation to a great step, this is an irreversible trend, but also the revolutionary leap in monitoring area.
Foresight: the structure of analog monitoring system determines that it can not avoid many limitations, such as only online real-time viewing, it is difficult to achieve remote monitoring and so on. It is inevitable that analog monitoring is replaced by network monitoring. Advanced: digital monitoring in the entire network monitoring system, simple structure, wiring easy to build, with the local network can.Security: more convenient for the management of the system, network monitoring system can be set by different permissions level, authorized to different levels of users. Only the most privileged users can set up the entire system andChange, only enough permissions to watch the corresponding video, greatly improving the security of the system. Scalability is good: when the system needs to expand, you only need to increase the corresponding front-end devices (such as network cameras, etc.), without the need for extensive changes and changes to the system.
Digital surveillance system is a video surveillance system, which consists of video coding, video transmission to control storage, and digital signals. It is relative to analog monitoring system. The evolution of video surveillance systems has gone through four generations:First generation: full analog systemAnalog cameras + tape recorders have been eliminatedThe second generation: semi digital systemAnalog camera + embedded hard disk video recorder (DVR), this stage is characterized by converting the analog signals into digital signals stored in the hard disk, and resolves the problem of video storage, and monitor market development is very rapid.The third generation: quasi digital systemAnalog camera + video server (DVS)The fourth generation: full digital systemThe full digital system adopts network camera, which can be seamlessly connected with other subsystems to realize real digitization.
