What is closed-circuit, such as closed-circuit surveillance, closed-circuit television, and so on
1 、 camera (transformer, support) - (video line, power line, control line) - hard disk recorder - display2, the camera (transformer, bracket), video line, power line and control line - (equipment box, optical transceiver, optical fiber, optical fiber jumper) (power line) - Optical - VIDEO - line distributor - matrix (DVR) - display (TV wall)
Closed-circuit television is the concept of open circuit, the so-called "open circuit" is released in the form of radio, that is, we all see ordinary television. "Closed-circuit" refers to television signals that transmit signals in a small range, such as military, medical and educational TV signals. The simplest closed-circuit television is a video camera that is plugged into a TV set so that only the TV receives the TV signals and no other TV can see it. This is called closed-circuit. Closed circuit monitoring, one finger camera to video host system
