61
Anthony J Bell: Blind signal processing system employing information maximization to recover unknown signals through unsupervised minimization of output redundancy. The Salk Institute for Biological Studies, Baker Maxham Jester & Meador, January 6, 1998: US05706402 (89 worldwide citation)

A neural network system and unsupervised learning process for separating unknown source signals from their received mixtures by solving the Independent Components Analysis (ICA) problem. The unsupervised learning procedure solves the general blind signal processing problem by maximizing joint output ...


62
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 ...


63
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 (87 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 ...


64
Wei ge Chen, Ming Chieh Lee: Multi-level run length coding for frequency-domain audio coding. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, April 24, 2001: US06223162 (86 worldwide citation)

A technique for entropy coding information relating to frequency domain audio coefficients. For portions of a frequency spectrum having a predominate value of zero, a multi-level run length encoder statistically correlates sequences of zero values with non-zero values and assigns variable length cod ...


65
Sunanda D Mitra: Adaptive vector quantization/quantizer. Texas Tech University, Jerry Cohen, Jacob N Erlich, Perkins Smith & Cohen, July 16, 2002: US06421467 (85 worldwide citation)

An adaptive vector quantization process and quantizer (VQ) using a clustering technique known as AFLC (adaptive fuzzy leader clustering) is disclosed. The quantizer, AFLC-VQ, has been designed to vector quantize wavelet decomposed sub images with optimal bit allocation. The high-resolution sub image ...


66
Navin Chaddha: Table-based compression with embedded coding. Microsoft Corporation, Lee & Hayes PLLC, March 19, 2002: US06360019 (85 worldwide citation)

An image compression system includes a vectorizer and a hierarchical vector quantization table that outputs embedded code. The vectorizer converts an image into image vectors representing respective blocks of image pixels. The table provides computation-free transformation and compression of the ima ...


67
Hamid Gharavi: Two-dimensional block scanning for subband image and video coding. Bell Communications Research, Leonard Charles Suchyta, Stephen M Gurey, January 4, 1994: US05276525 (83 worldwide citation)

A signal coder is disclosed with improved compression of pictorial data that has been decomposed into plural subbands through a two-dimensional quadrature-mirror decomposition (102). In each of the higher frequency bands, the decomposed samples are quantized and then partitioned (106, 110, 114), in ...


68
Azizul H Quazi: Method for detecting acoustic signals from an underwater source. The United States of America represented by the Secretary of the Navy, Michael J McGowan, Prithvi C Lall, Michael F Oglo, September 16, 1997: US05668778 (83 worldwide citation)

A method for detecting radiated and reflected acoustic signals from an unwater source, wherein the acoustic signals are present in a random noise environment and form an output therewith. The method includes the steps of operating an entropy-based acoustic receiver to receive the output, calculating ...


69
Arnaud Eric Jacquin, Kyeong Ho Yang: Rate-distortion optimized coding mode selection for video coders. Lucent Technologies, William Ryan, December 26, 2000: US06167162 (82 worldwide citation)

A new method for real time implementation of rate-distortion optimized coding mode selection is disclosed that can be efficiently applied to H-263-compatible video codecs and other codecs of similar type. A normalized rate-distortion model is used to efficiently compute the rate and the distortion w ...


70
John F Remillard: Method and apparatus for iterative compression of digital data. PS Venture 1, Kenneth R Allen, Townsend and Townsend and Crew, January 23, 1996: US05486826 (82 worldwide citation)

Data compression is effected on arbitrary high entropy digitized data by compression and entropy transformation in an iterative system. Compression includes nonlinear addressing. Entropy transformation may involve any of a number of techniques to reorder distribution of data for testing to determine ...



Click the thumbnails below to visualize the patent trend.