Compressing/decompressing apparatus and method to compress and decompress a video graphics signal
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United States of America Patent
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-
Jul 11, 2000
Grant Date -
N/A
app pub date -
Nov 13, 1997
filing date -
Sep 23, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A compressing/decompressing apparatus comprising a receiver, a memory interface, a compressor and a decompressor is disclosed. The receiver receives a video graphics signal comprising a plurality of video graphics packets, each comprising a plurality of pixels. The memory interface is coupled between the frame buffer memory and the compressing and decompressing device as a data transfer interface. The compressor sequentially receives a video graphics packet of the video graphics signal, truncates a predetermined length of LSBs of each pixel in the video graphics packet to form a compressed video graphics signal comprising of a plurality of compressed video graphics packets, and stores the compressed video graphics signal in a frame buffer memory. The decompressor sequentially receives a compressed video graphics packet of the compressed video graphics signal, recovers each pixel of the compressed video graphics packet with an adjusted value of the predetermined length to form a decompressed video graphics signal comprising of a plurality of decompressed video graphics packets.
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