Patent ID: 7460156

Claim:
A method for signal transmission between a television camera and a video apparatus which are connected to each other through a transmission cable, said method comprising the steps of: time division multiplexing at said television camera a video signal and first control signals at a multiplexing period which is one-seventh ( 1/7) of a clock signal, by using a first time-division multiplexing circuit, to generate a first serial signal; transmitting to said video apparatus said first serial signal in a form of first differential signals by using a predetermined first pair of signal lines in said cable; transmitting said clock signal from said television camera to said video apparatus in a form of second differential signals by using a predetermined second pair of signal lines in said cable; separating at a first time division de-multiplexing circuit of said video apparatus said first serial signal reproduced from said first differential signals from said first pair of signal lines into said video signal and said first control signals by using said clock signal reproduced from said second differential signals from said second pair of signal lines; and transmitting to said television camera second control signals in a form of third differential signals using a third pair of signal lines in said cable.