Adaptive variable-length coding and decoding methods for...

Details Adaptive variable-length coding and decoding methods for... Adaptive variable-length coding and decoding methods for...

1994-12-16

2009-12-01

Lu, Tom Y (Department: 2624)

Image analysis

Image compression or coding

Lossless compression

C382S232000, C382S239000, C375S213000, C375S213000, C375S213000, C375S213000

Reissue Patent

active

RE041026

ABSTRACT:
An adaptive variable-length coding/decoding method performs an optimal variable-length coding and decoding depending on an intra mode/inter mode condition, quantization step size and a current zigzag scanning position, such that a plurality of variable-length coding tables having different patterns of a regular region and an escape region according to statistical characteristics of the run level data are set. One of the variable-length coding tables is selected according to mode, quantization step size and scanning position, and the orthogonal transform coefficients according to the selected variable-length coding table are variable-length-coded.

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