The camera part is the front part of the TV monitoring system and is the "eye" of the entire system. It is arranged at a location on the site to be monitored so that its field of view covers the entire monitored area. In some cases, the area to be monitored has a large area. In order to save the number of cameras used and simplify the transmission system and control and display system, an electric (remote control) zoom (zoom) lens is mounted on the camera to enable the camera to The observation distance is farther and clearer; sometimes the camera is installed on the electric head, and through the control of the console, the head can drive the camera to rotate horizontally and vertically, so that the camera can cover the angle and area. Big. In short, the camera, like the eyes of the entire system, turns its surveillance content into an image signal and transmits it to the monitor on the control center.
Think of the transmission part as the system's image signal path. In general, the transmission section refers solely to the transmission of image signals. However, in some systems, in addition to images, sound signals must be transmitted. At the same time, because the control center needs to control the camera, lens, pan/tilt, and protective cover through the console, it also contains controls in the transmission system. The transmission of signals, so the transmission part we talk about here usually refers to the sum of the transmission systems formed by all the signals to be transmitted.
The control part is the "heart" and "brain" of the entire system and is the command center that realizes the functions of the entire system. The control section consists mainly of the general console (some systems also have a secondary console). The main functions in the main console are: amplification and distribution of video signals, correction and compensation of image signals, switching of image signals, recording of image signals (or including sound signals), cameras and their accessories (such as lenses, pan/tilt, and protection) Covers, etc.) Controls (remote control) etc. Among the above-mentioned parts, the greatest influence on image quality is amplification and distribution, correction and compensation, and switching of image signals.
The display section generally consists of several or more monitors (or regular TVs with video inputs). Its function is to display the transmitted images one by one. In a television monitoring system, especially in a television monitoring system composed of a plurality of cameras, generally not one monitor corresponds to one camera for display, but several camera's image signals are alternately displayed with one monitor. , To the current popular BSV LCD cross-screen display, picture-in-picture display.
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