CCTV CCTV surveillance system

The present invention relates to a closed cable television (CCTV) surveillance system capable of transmitting a video signal through one coaxial cable. According to the present invention, the system comprises: a synchronized camera; a plurality of synchronization cameras synchronously coupled to the synchronized camera; a camera control unit outputting a control signal to select and control each camera; and a monitor connected to the camera control unit to display a photographed video. The synchronization camera includes: an identification unit to detect and identify an input/output terminal of the video signal as well as the control signal; a video signal switching unit controlled based on an identification result; and a control signal reproduction unit reproducing and multiplexing the control signal to the video signal, so as to output the multiplexed video signal to a front camera. 본 발명은 CCTV 감시 시스템에 관한 것으로, 더욱 구체적으로는 CCTV 감시 시스템에 관한 것으로, 더욱 구체적으로는 한 개의 동축 케이블로 영상 신호를 전송할 수 있다.