Picture transmission system

A picture transmission system comprising:

• a receiver;
• a transmission line having a first and a second end and being connected at the first end to the receiver;
• and
• a transmitter connected to the second end of the transmission line comprising:
• an A-D converter for converting an analog video input signal into a digital picture signal;
• a moving picture converting section for converting the digital picture signal into a reduced moving picture;
• a video encoder for compression-encoding the reduced moving picture by a preselected hybrid coding system;
• a transmission encoder for receiving a video signal coded by the video encoder and transmitting the video signal to the transmission line;
• switching means located between the A-D converter and the moving picture converting section operative in response to a still picture switching signal and a moving picture switching signal from the receiver;
• and
• a still picture converting section inserted between the switching means and the video encoder;
• wherein, the digital picture signal output from the A-D converter is permitted to be selectively input to either the moving picture converting section or the still picture converting section by the switching means and wherein when the switching means is switched to the still picture converting section in response to the still picture switching signal, in the still picture converting section a picture signal of one frame is divided into a plurality of picture signals having substantially the same size as that of the reduced moving picture so
• that the divided picture signals are sequentially applied to the video encoder.