Television – Format conversion – Field rate type flicker compensating
Patent
1997-06-30
1999-10-05
Kostak, Victor R.
Television
Format conversion
Field rate type flicker compensating
348910, 348446, H04N 701
Patent
active
059632623
ABSTRACT:
A system and method for conversion of graphics from computer graphics formats to television formats is disclosed. More particularly, an improved scaling and flicker reduction system and method is disclosed for scaling personal computer (PC) graphics formats into different resolution television (TV) formats and for reducing flicker due to the conversion process of interlacing non-interlaced PC graphics to match interlaced TV formats. The scaling implementation reduces line buffer requirements by using a conditional scaling technique for converting graphics from a PC resolution format to a TV resolution format. The flicker reduction implementation provides a two-dimensional adaptive filter that selects between multiple filters so that different parts of an image may have different flicker reduction and different levels of trade off between flicker reduction and resolution. The system and method disclosed are more generally applicable to converting images from one resolution to another and to reducing flicker in images converted from a non-interlaced format to an interlaced format.
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Ke Ligang
Lutz Juergen M.
Cirrus Logic Inc.
Kostak Victor R.
Peterman Brian W.
Violette J.P.
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