A local area network (LAN) supports both baseband digital LAN signals and video, including television signals originating outside the network and local video generated within the network. The network may include personal computers, television receivers, video cassette recorders, printers, and video...http://www.google.de/patents/US5805806?utm_source=gb-gplus-sharePatent US5805806 - Method and apparatus for providing interactive networking between televisions and personal computers 
