- 专利标题： Compression and decompression with wavelet style and binary style including quantization by device-dependent parser
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申请号： US642518申请日： 1996-05-03
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公开(公告)号： US5881176A公开(公告)日： 1999-03-09
- 发明人: Alexander F. Keith , Edward L. Schwartz , Ahmad Zandi , Martin Boliek , Michael J. Gormish
- 申请人： Alexander F. Keith , Edward L. Schwartz , Ahmad Zandi , Martin Boliek , Michael J. Gormish
- 申请人地址： CA Menlo Park JPX Tokyo
- 专利权人： Ricoh Corporation,Ricoh Company, LTD.
- 当前专利权人： Ricoh Corporation,Ricoh Company, LTD.
- 当前专利权人地址： CA Menlo Park JPX Tokyo
- 主分类号： G06F17/14
- IPC分类号： G06F17/14 ; G06T9/00 ; H03M7/30 ; H04N7/24 ; H04N7/26 ; H04N7/30 ; G06K9/36 ; G06K9/46
摘要：
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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