A method for displaying a supplementary video image outside a main image. For example, the main image has a 4/3 aspect ratio and the tube has a 16/9 aspect ratio. The method includes steps of processing a supplementary video image at the time of the line return of the main image to provide a video signal...http://www.google.de/patents/US5255098?utm_source=gb-gplus-sharePatent US5255098 - Process for the insertion of a supplementary video information set outside a main image
