Still/moving picture selection control circuit for video phone system.

摘要

A still/moving picture selection control circuit for selecting a still picture or a moving picture in a video phone system by the operation of a switch. The circuit includes a still selection unit (4) for outputting pulse signals, a one-frame signal generating unit (5) for generating one-frame signal, a movie signal generating unit (6) for generating or stopping movie control signals, a still/movie control unit (7) for applying a subcarrier frequency signal (fsc) to an A/D converter (1) when one-frame signal is outputted from the one-frame signal generating unit (5) or when movie control signal is outputted from the movie signal generating unit (6), a memory section (3) for storing the output signals of the A/D converter (1) to a RAM when the one-frame signal is outputted and for applying the signals stored in the RAM to a D/A converter (2) when the one-frame signal is not outputted.