51
Paul C Kocher, Joshua M Jaffe, Benjamin C Jun: Using unpredictable information to minimize leakage from smartcards and other cryptosystems. Cryptography Research, Joseph Yang, Thomas R Lane, Skadden Arps et al, December 4, 2001: US06327661 (93 worldwide citation)

Methods and apparatuses are disclosed for securing cryptosystems against external monitoring attacks by reducing the amount (and signal to noise ratio) of useful information leaked during processing. This is generally accomplished by incorporating unpredictable information into the cryptographic pro ...


52
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 ...


53
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 (92 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 ...


54
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 (92 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 ...


55
Cesar A Gonzales, Joan L Mitchell, William B Pennebaker: Adaptive graylevel image compression system. International Business Machines Corporation, Marc A Block, February 16, 1988: US04725885 (91 worldwide citation)

Apparatus and method for modelling differential pulse code modulation (DPCM) input data for entropy coding. In particular, the sign and magnitude of one piece of DPCM data after another are modelled to provide a magnitude state input and a sign state input to provide context for DPCM magnitude input ...


56
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 (91 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 ...


57
Shinichi Terashita: Method and device for measuring cell gap of liquid crystal display using near-IR radiation. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, October 21, 2003: US06636322 (91 worldwide citation)

A method and device for measuring cell gap of a liquid crystal display, the display comprising a pair of substrates with electrodes adhered together forming a predetermined sized cell gap. The device and method includes radiating near-infrared light toward the liquid crystal cell, reflectively inter ...


58
Andrew Michael Zador: Method, apparatus and system for compressing data. Andrew Michael Zador, Gowling Lafleur Henderson, September 26, 2000: US06125201 (91 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 ...


59
Hamid Gharavi: Apparatus and method for differential sub-band coding of video signals. Bell Communications Research, James W Falk, Stephen M Gurey, November 6, 1990: US04969040 (91 worldwide citation)

A method and apparatus for achieving a high compression of a video signal. The PEL-by-PEL difference between an input signal consisting of digital PEL values of a scanned video signal and a motion compensated interframe prediction signal is decomposed into several narrow bands using separable two-di ...


60
Ahmad Zandi, David G Stork, James Allen: Compression of palettized images and binarization for bitwise coding of M-ary alphabets therefor. Ricoh Company, Ricoh Corporation, Philip H Albert, Townsend and Townsend and Crew, November 28, 1995: US05471207 (89 worldwide citation)

The invention provides an improved method and apparatus for compression of palettized images. Input symbols in an M-ary alphabet are binarized based on a context model of the input data, where the binarization is selected to provide good compression by a binary encoder. The particular binarization i ...



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