Morgan & Finnegan
Video signal processing apparatus to multiplex a video and control signal
 A video signal processing apparatus of the invention has an image pickup unit for picking up an image of an object and generating a video signal corresponding to the picked-up object image, a signal processing unit for executing various kinds of signal processes to the video signal which is generated from the image pickup unit, and a cable for electrically connecting the image pickup unit and the signal processing unit. In order to transmit and receive a data signal between the image pickup unit and the signal processing unit through the cable, for a predetermined period of time of the video signal which is transmitted from the image pickup unit to the signal processing unit through the cable, a plurality of kinds of video signals of different DC potentials are switched and outputted in accordance with the data signal, thereby multiplexing the data signal to the video signal. Thus, a function for multiplexing the data signal to the video signal and transmitting the multiplexed signal can be realized by a circuit of a cheap and simple construction of a small scale. 
Canon Kabushiki Kaisha
H H
H04N H04N
inventional inventional
Yasuo
Suzuki