Visual frame buffer architecture
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United States of America Patent
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Aug 13, 1996
Issued Date -
N/A
app pub date -
Apr 20, 1995
filing date -
Apr 17, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A graphics controller concurrently reads two streams of visual data stored in memory, where one of the streams is in a subsampled data format. The graphics controller upsamples the subsampled visual data and merges the two data streams to generate a merged pixel stream for display. One data stream may be graphics data in an 8-bit CLUT format and the other data stream may be video data in an 8-bit YUV format. The graphics controller may apply chromakeying to generate the merged pixel stream.
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