One, overview

Closed circuit television monitoring system (CCTV) is the application of optical fiber, coaxial cable, microwave transmission of television signals in the closed loop, and the television system independent and complete from the camera to the image display. It can real-time, image and truly reflect the object being monitored, not only greatly extends the human eye observation distance, but also expanded the human function, it can be in bad environment instead of manual long time monitoring, let a person can see the monitored all cases that occur in practice field, and through video recording.

The use of closed circuit television monitoring system, can protect the personal safety, save time and cost, improve efficiency, achieve real-time command and scheduling, processing and storage of information. Therefore, in the 90's after the closed-circuit television monitoring system has been widely applied to public security, finance, mining, transportation, medical, commercial, military, Turist Hotel, important material storage and security and other fields, has become one of the symbol of modernization management.