Method and system for context-based adaptive binary...

Details Method and system for context-based adaptive binary... Method and system for context-based adaptive binary...

2005-02-15

2005-02-15

Johns, Andrew W. (Department: 2621)

Image analysis

Image compression or coding

Lossless compression

C382S173000, C382S248000

Reexamination Certificate

active

06856701

ABSTRACT:
A method and system for image coding, wherein an image is divided into a plurality of blocks for scanning. The pixels values in the scanned block are represented by a plurality of level-run value pairs, wherein the level value is indicative of a non-zero pixel value and the run value is indicative of the number of consecutive zero pixel values preceding the non-zero pixel value. A plurality of contexts indicative of the level-run value pairs are conveyed to a decoder for allowing the decoder to reconstruct the image based on the contexts. The assignment of the contexts is also based on the level value of a preceding level-run pair. Additionally, instead of an end-of-block symbol, the number of non-zero coefficients is provided to the decoder prior to conveying the contexts thereto.

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Gisle Bjontegaard, Recommended Simulation Conditions for H.26L (VCG-M75, ITU-T Video Coding Experts Group, Austin, TX USA, Apr. 2-4, 2001).

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