A video signal apparatus allows multiple pictures to be displayed. A plurality of input video signals are processed to produce a plurality of signals corresponding to a respective plurality of pictures. The plurality of pictures corresponding to the plurality of signals are displayed. At least one of...http://www.google.es/patents/US5969767?utm_source=gb-gplus-sharePatente US5969767 - Multipicture video signal display apparatus with modified picture indication
Multipicture video signal display apparatus with modified picture indication
