Contour compensator for video image having overlapping information

Abstract

A contour compensator for adding preshoot or overshoot to a transitional portion of a video signal to improve the resolution of a picture. The compensator comprises a window signal generator for generating a window signal corresponding to a portion of the video signal where additional information, such as characters, overlaps the picture. This window signal interrupts the preshoot or overshoot to be added to the transitional portion of the video signal at the point where additional information overlaps the picture. The compensator controls the amount of preshoot or overshoot in a portion of the video signal in which additional information, e.g. a news flash, a weather bulletin, or a movie subtitle overlaps a picture, thereby obtaining a video signal which is contour-compensated without being affected by the additional information.

Dependencies are inferred from the claim text.