In a multilocation conference terminal for transmitting audio and video information to a plurality of remote locations, rapid video and non-disrupted audio switching are obtained by employing a plurality of single composite digital signals each including all the video information from an associated location...http://www.google.fr/patents/US4574374?utm_source=gb-gplus-shareBrevet US4574374 - Multilocation video conference terminal including rapid video switching
Multilocation video conference terminal including rapid video switching
