CCTV System for compositely transmitting power and control signal using image signal line in CCTVClosed Circuit Television

摘要

The present invention relates to a power and control signal superimposed transmission system using a video signal line in CCTV. The power and control signal superimposed transmission system using the video signal line in the CCTV according to the present invention includes a PoC camera module, transmits a video signal according to driving of the camera module to the PoC receiver, and the PoC receiver detects the PoC transmitter A PoC transmitter that outputs a clock signal to the PoC receiver; And a PoC receiver that superimposes and transmits power to the PoC transmitter by applying power on the video signal line, receives and processes the video signal transmitted from the PoC transmitter, and transmits a signal for controlling the camera module of the PoC transmitter to the PoC transmitter. The PoC receiver transmits a relatively low voltage as a voltage supplied to operate only a circuit for detecting a PoC transmitter in superimposing transmission to a PoC transmitter by applying power to a video signal line, and from the PoC transmitter After detecting the clock signal for a certain period of time, a relatively high voltage is transmitted.