Method and apparatus for data compression during monitor refresh operations
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United States of America Patent
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Oct 8, 1996
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N/A
app pub date -
Dec 30, 1993
filing date -
Dec 30, 1993
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Abstract
The present invention discloses a method and apparatus for performing data compression during monitor refresh operations. In one embodiment, it is envisioned that the compression functions would be performed in a refresh compaction device and the de-compression functions would be performed in a RAMDAC, thereby requiring only the transfer of compressed data between the refresh compaction device and the RAMDAC. In an alternative embodiment, it is envisioned that both the compression and de-compression functions would be performed in the refresh compaction device. Regardless of implementation, a 'critical fill' level is determined during compression and a 'critical fill' interrupt is generated during de-compression to gain control of the frame buffer before the compressed digital data is fully depleted.
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