Compression/decompression using reversible embedded wavelets
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United States of America Patent
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Oct 12, 1999
Issued Date -
N/A
app pub date -
May 3, 1996
filing date -
Sep 21, 1994
priority date (Note) -
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Abstract
A compression and decompression system in which a reversible wavelet filter are used to generates coefficients from input data, such as image data. The reversible wavelet filter is an efficient transform implemented with integer arithmetic that has exact reconstruction. The present invention uses the reversible wavelet filter in a lossless system (or lossy system) in which an embedded codestream is generated from the coefficients produced by the filter. An entropy coder performs entropy coding on the embedded codestream to produce the compressed data stream.
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