A wide screen television apparatus comprises a memory for storing a set of video sources, a circuit for tuning to the set of video sources and a video signal processor. The video signal processor is coupled to the memory and to the tuning circuit, and develops a wide screen multiple picture display by...http://www.google.es/patents/US5398074?utm_source=gb-gplus-sharePatente US5398074 - Programmable picture-outside-picture display
