Hewlett-packard Development Company, L.P.

Texas Instruments Corporation

Ess Technology, Inc.

Christos Chrysafis

Erik Ordentlich

Amir Said

Youngjun Yoo

Antonio Ortega

Jie Liang

David S Taubman

Siu-Leong Yu

To encode an unencoded block of a frame, a search window is defined within the frame. Each pixel disposed within the search window and disposed in the unencoded portion of the frame that is assigned a value. A difference is computed between the unencoded block and each possible block within the search window. The block having the smallest difference, together with this difference are used to encode the unencoded block.

Intra-prediction using intra-macroblock motion compensation

A method of image encoding using subband decomposition followed by modified zerotree coding with a symbols for zero and significant zerotrees and isolated zeroes and isolated significant coefficients.

Image compression

A method, system and program product for compressing a compound image, comprising forming compound image data into a plurality of blocks; obtaining classifying data that designate one from a plurality of classes for each of a plurality of said blocks, based on predominate compression properties of the block; for each of a plurality of said blocks, obtaining transformed data therefor from either a lossy or a lossless transform selected based on the classifying data for the block; and forwarding that transformed data to one entropy encoder. In one embodiment, obtaining transformed data comprises obtaining transformed data from at least one of a lossy transform, a first lossless transform, or a second lossless transform, based on the classifying data for the transform.

JADE-JPEG based adaptive document compression engine

A subband decomposition of an image is performed by filtering the image in a progression of N line windows. In a first filter stage, vertical filters perform high and low pass filtering on each N line window. Then horizontal filtering is performed on the output of each vertical filter. The lowest subband provided by the filter stage is recursively decomposed by additional filter stages. Higher subbands of each filter stage are encoded and placed in an embedded bitstream. Block encoding can be performed in which a number of lines of each subband are coded as a plurality of blocks. The blocks of a subband are coded independently of each other. The block coding supports region-of-interest reconstruction.

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Mountain View, CA, United States of America

Christos Chrysafis