Computer graphics processing and selective visual display system – Computer graphics display memory system – Row buffer
Reexamination Certificate
2007-12-11
2007-12-11
Wu, Xiao (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics display memory system
Row buffer
C345S649000, C345S658000, C382S296000, C382S297000, C348S583000
Reexamination Certificate
active
10906091
ABSTRACT:
A frame buffer stores X pixels per line and Y lines and is read using a burst of B pixels. The un-rotated image is rotated by 90 degrees for display by writing and reading pixels from a line buffer. The line buffer stores a block of B*Y pixels. The frame buffer is logically divided into X/B blocks that are B pixels wide. Blocks are read from the frame buffer from the bottom line to the top with a burst of B pixels per line. An offset locate pixels to read in the line buffer. The offset is B for the first block, and increases by a factor of B for each block read, but wraps around modulo B*Y−1. Pixels for a next block are written into the line buffer to locations vacated as pixels are read out. The increasing offset re-orders the pixels for the rotated display order.
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Jacobs Edward M.
Yang Jimmy
Ye Bo
Auvinen Stuart T.
g Patent LLC
Lin David
NeoMagic Corp.
Wu Xiao
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