Picture codec for teleconference equipment, which forms and displays picture-in-frame including at least two of received motion picture, a received still picture and a self motion picture in an optional combination

A picture codec for teleconference terminal equipment, to which coded still picture data received from a communication channel and coded motion picture data received from the communication channel are input, and from which coded picture data to be transferred to the communication channel and an output picture signal are output, said coded picture data being obtained by coding an input analog picture signal, comprising:

• an analog-to-digital converter which converts the input analog picture signal into digital picture data;
• a still picture coder which codes said digital picture data produced by said analog-to-digital converter, so as to deliver coded still picture data;
• a video coder which codes said digital picture data produced by said analog-to-digital converter, so as to deliver coded motion picture data;
• a selector which selects either of said coded motion picture data delivered from said video coder and said coded still picture data delivered from said still picture coder, and which delivers the selected picture data as the output coded picture data;
• a still picture decoder which decodes the input coded still picture data for playback, into decoded still picture data;
• a video decoder which decodes the input coded motion picture data for playback, into decoded motion picture data;
• a picture-in-picture processor which generates picture-in-picture frame data on the basis of said decoded still picture data delivered from said still picture decoder, said decoded motion picture data delivered from said video decoder and said digital picture data delivered from said analog-to-digital converter, said picture-in-picture frame data forming a picture-in-picture frame which includes said digital picture data and optionally one of said decoded still picture data and said decoded motion picture data;
• and
• a digital-to-analog converter for converting said picture-in-picture frame data generated by said picture-in-picture processor, into the output analog picture signal, and which delivers said output analog picture signal.