Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Patent
1992-04-29
1994-07-12
Groody, James J.
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
348588, H04N 5208
Patent
active
053293169
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.
REFERENCES:
patent: 5225910 (1993-07-01), Sugimori et al.
patent: 5237625 (1993-08-01), Yamashita et al.
Groody James J.
Murrell Jeffrey S.
Samsung Electronics Co,. Ltd.
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