Data compression/decompression circuit and method
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United States of America Patent
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May 7, 2002
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N/A
app pub date -
Dec 22, 2000
filing date -
Dec 22, 2000
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Abstract
A method and circuit for compression and decompression of data. For compression, successive units of input data are received in first register and second registers. The contents of the registers are used to address a lookup RAM, and the data stored in the lookup RAM is used to address a dictionary RAM. If output data from the dictionary RAM does not match output data from the first and second registers, a value from a dictionary counter is stored in the lookup RAM. If output data from the dictionary RAM matches output data from the first and second registers, data read from the lookup RAM is fed back for storage in the first register. The data from the first and second registers is provided as compressed output data. For decompression, the compressed data are used to populate another dictionary RAM, which is used to reconstruct the uncompressed data.
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