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US 7,889,279 B2Granted
Method and apparatus for suppressing cross-coloration in a video display device
AssigneeNovatek Microelectronics Corp.
InventorMei-Fei Chen
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Abstract
A method for suppressing cross-coloration in a video display device includes receiving high-frequency components of luminance signals corresponding to scanlines of an image frame, determining luminance transitions according to the high-frequency components of the luminance signals, and adjusting chrominance signals of the scanlines according to the luminance transitions.
Claims36
A method for cross-coloration suppression in an image display, the method comprising:
- obtaining a plurality of high-frequency components of a plurality of luminance signals corresponding to a plurality of scanlines in an image;
- determining a luminance transition based on summing a plurality of high-frequency components of a composite signal of n scanlines of the plurality of scanlines;
- and
- adjusting a plurality of chrominance signals corresponding to the plurality of scanlines based on the luminance transition.
1 more element
A cross-coloration suppression device used in an image display comprising:
- a plurality of filters for obtaining a plurality of high-frequency components of a plurality of composite signals of a plurality of scanlines in an image;
- an edge detector connected to the plurality of filters for determining a level of a luminance transition based on a plurality of high-frequency components of a plurality of luminance signals in the plurality of scanlines;
- and
- a compensator connected to the edge detector for adjusting a plurality of chrominance signals of the plurality of scanlines based on the level of luminance transition.
1 more element
Dependencies are inferred from the claim text.