51
Wing S Wong, An Qin: Method and apparatus for establishing topic word classes based on an entropy cost function to retrieve documents represented by the topic words. The Chinese University of Hong Kong, Kenneth R Allen, Townsend and Townsend and Crew, October 3, 2000: US06128613 (97 worldwide citation)

A computer-based method and system for establishing topic words to represent a document, the topic words being suitable for use in document retrieval. The method includes determining document keywords from the document; classifying each of the document keywords into one of a plurality of preestablis ...


52
Andrew Michael Zador: Method, apparatus and system for compressing data. Andrew Michael Zador, Gowling Lafleur Henderson, September 26, 2000: US06125201 (97 worldwide citation)

An apparatus and method for image data compression performs a modified zero-tree coding on a range of absolute image values from the largest to a determined smaller absolute value, based upon file size or quality. If it is desired to maintain more detail in the image, then a vector quantizer codes t ...


53
Eugenio Martinez Uriegas, Hewitt D Crane, John D Peters: Method and apparatus for compression and decompression of digital color images. SRI International, Townsend and Townsend Khourie and Crew, March 14, 1995: US05398066 (97 worldwide citation)

Color image compression and decompression is achieved by either spatially and chromatically multiplexing three digitized color planes, such as RGB (Red-Green-Blue), into a digital array representative of a single digitized spatially- and chromatically-multiplexed plane, or, by use of a color imaging ...


54
Raymond Lau, Ronald Rosenfeld, Salim Roukos: Building scalable N-gram language models using maximum likelihood maximum entropy N-gram models. International Business Machines Corporation, Robert Tasinari, Sterne Kessler Goldstein & Fox, November 14, 1995: US05467425 (97 worldwide citation)

The present invention is an n-gram language modeler which significantly reduces the memory storage requirement and convergence time for language modelling systems and methods. The present invention aligns each n-gram with one of "n" number of non-intersecting classes. A count is determined for each ...


55
Zhengrong Wang, Paul Steven Houle: Data compression using adaptive bit allocation and hybrid lossless entropy encoding. America Online, Fish & Richardson P C, April 11, 2000: US06049630 (96 worldwide citation)

A method and apparatus for adaptive bit allocation and hybrid lossless entropy encoding in a lossy compression system. The invention includes three components: (1) a transform stage to decorrelate image data into a baseband and multiple subbands, (2) a quantization stage to quantize the resulting tr ...


56
Anurag Bist: Adaptive entropy coding in adaptive quantization framework for video signal coding systems and processes. Conexant Systems, Price Gess & Ubell, August 29, 2000: US06111914 (96 worldwide citation)

A compression system and process include adaptive quantization for selection of one quantizer, for each video frame or frame portion, from a group of quantizers, where each quantizer is a set of predefined quantizer values, and coding of the quantized values using a common entropy coding table for a ...


57
Shaw Min Lei, Ming Ting Sun, Kou Hu Tzou: Method and system for high order conditional entropy coding. Bell Communications Research, Leonard Charles Suchyta, March 29, 1994: US05298896 (94 worldwide citation)

Method and system for high order conditional entropy coding utilizing an incremental-tree-extension technique to design a conditional tree for the coding. For complexity reduction, code table reduction and non-uniform quantization of conditioning symbols or pixels is provided. A pattern matching tec ...


58
Kiyohito Tokuda, Atsushi Fukasawa, Satoru Shimizu, Yumi Takizawa: Multi-stage linear predictive analysis method for feature extraction from acoustic signals. Oki Electric, Edward D Manzo, September 7, 1993: US05243686 (93 worldwide citation)

Features are extracted from a sampled input signal by performing first linear predictive analyses of different first orders p on the sample values and performing second linear predictive analyses of different second orders q on the residuals of the first analyses. An optimum first order p is selecte ...


59
Zhengrong Wang, Paul Steven Houle: Data compression using adaptive bit allocation and hybrid lossless entropy encoding. Johnson Grace Company, Fish & Richardson P C, October 28, 1997: US05682152 (93 worldwide citation)

A method and apparatus for adaptive bit allocation and hybrid lossless entropy encoding in a lossy compression system. The invention includes three components: (1) a transform stage to decorrelate image data into a baseband and multiple subbands, (2) a quantization stage to quantize the resulting tr ...


60
Masahiro Ishida, Takahiro Yamaguchi, Marco Tilgner: Method and device for compressing and expanding data pattern. Advantest Corporation, David N Lathrop Esq, Gallagher & Lathrop, December 9, 2003: US06661839 (92 worldwide citation)

There are provided methods each of which is for efficiently compressing a test pattern to be applied to an IC for testing. The number of data changes &phgr; and a data entropy H of a pattern for each pin of an IC are obtained and then the test pattern is divided and the divided patterns are distribu ...