Color conversion using 4.5 bit palette
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United States of America Patent
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Mar 24, 1998
Grant Date -
N/A
app pub date -
Aug 30, 1996
filing date -
Dec 30, 1994
priority date (Note) -
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Abstract
A computer-implemented process and apparatus are used for efficient conversion of color video signals. The most significant bits (MSBs) of YUV data are masked off and converted into a single index that allows for the number of colors needed in a standard display format. The Y MSBs are scaled down by a fractional factor prior to the formation of the index so as to save computer memory space that would otherwise be wasted. In a preferred embodiment, relatively low-noise and temporally-changing dithering is applied to the values of full-sampled YUV data prior to color conversion.
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