A system for combining a plurality of video signals and various forms of still imagery such as text or graphics into a single high resolution display is disclosed. The inventive system utilizes a multiport memory and a key based memory access system to flexibly compose a multiplicity of video signals...http://www.google.fr/patents/US5068650?utm_source=gb-gplus-shareBrevet US5068650 - Memory system for high definition television display
Memory system for high definition television display
