Inventor
ZANDI AHMAD
US34 patents
⚠️ This page may combine multiple inventors who share the name “ZANDI AHMAD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
24 patentsUS6195465B1Feb 27, 2001
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
RICOH KK217 citations99
US5748786AMay 5, 1998
Apparatus for compression using reversible embedded wavelets
RICOH KK257 citations99
US5710562AJan 20, 1998
Method and apparatus for compressing arbitrary data
RICOH KK157 citations99
US5471207ANov 28, 1995
Compression of palettized images and binarization for bitwise coding of M-ary alphabets therefor
RICOH KK159 citations99
US7634145B2Dec 15, 2009
Compression and decompression with wavelet style and binary style including quantization by device-dependent parser
RICOH KK52 citations98
US6757437B1Jun 29, 2004
Compression/decompression using reversible embedded wavelets
RICOH KK89 citations98
US6058215AMay 2, 2000
Reversible DCT for lossless-lossy compression
RICOH KK80 citations97
US6873734B1Mar 29, 2005
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
RICOH KK38 citations96
US6466699B2Oct 15, 2002
Reversible DCT for lossless—lossy compression
RICOH KK38 citations96
US6222941B1Apr 24, 2001
Apparatus for compression using reversible embedded wavelets
RICOH KK52 citations96
US5999656ADec 7, 1999
Overlapped reversible transforms for unified lossless/lossy compression
RICOH KK46 citations96
US5815097ASep 29, 1998
Method and apparatus for spatially embedded coding
RICOH KK83 citations96
US7492955B2Feb 17, 2009
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
RICOH KK15 citations93
US7418142B2Aug 26, 2008
Method for compression using reversible embedded wavelets
RICOH KK29 citations93
US7313286B2Dec 25, 2007
Reversible DCT for lossless-lossy compression
RICOH KK22 citations93
US7215820B2May 8, 2007
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
RICOH KK16 citations93
US6219458B1Apr 17, 2001
Overlapped reversible transforms for unified lossless/lossy compression
RICOH KK33 citations93
US6216145B1Apr 10, 2001
Overlapped reversible transforms for unified lossless/lossy compression
RICOH KK20 citations93
US6195466B1Feb 27, 2001
Reversible DCT for lossless-lossy compression
RICOH KK15 citations93
US6006226ADec 21, 1999
Method and system for document image feature extraction
RICOH KK77 citations93
US5731988AMar 24, 1998
Method and apparatus for reversible color conversion
RICOH KK38 citations93
US7016545B1Mar 21, 2006
Reversible embedded wavelet system implementation
RICOH KK24 citations90
US7167592B2Jan 23, 2007
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
RICOH KK7 citations74
US6792155B2Sep 14, 2004
Reversible DCT for lossless—lossy compression
RICOH KK6 citations74
RICOH CORP
5 patentsUS5966465AOct 12, 1999
Compression/decompression using reversible embedded wavelets
RICOH CORP226 citations99
US5881176AMar 9, 1999
Compression and decompression with wavelet style and binary style including quantization by device-dependent parser
RICOH CORP174 citations99
US5867602AFeb 2, 1999
Reversible wavelet transform and embedded codestream manipulation
RICOH CORP284 citations99
US7076104B1Jul 11, 2006
Compression and decompression with wavelet style and binary style including quantization by device-dependent parser
RICOH CORP55 citations96
US7068849B2Jun 27, 2006
Method and apparatus for compression using reversible wavelet transforms and an embedded codestream
RICOH CORP24 citations93
IBM
3 patentsUS5561421AOct 1, 1996
Access method data compression with system-built generic dictionaries
IBM183 citations96
US5546080AAug 13, 1996
Order-preserving, fast-decoding arithmetic coding arithmetic coding and compression method and apparatus
IBM83 citations96
US5270712ADec 14, 1993
Sort order preserving method for data storage compression
IBM59 citations96