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...

2006-07-11

2006-07-11

Tran, Phuoc (Department: 2621)

Image analysis

Image compression or coding

Including details of decompression

C382S246000, C382S239000, C382S250000

Reissue Patent

active

RE039167

ABSTRACT:
An adaptive variable-length coding/decoding method performs an optimal variable-length coding and decoding depending on an intro 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.

REFERENCES:
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patent: 5329318 (1994-07-01), Keith
patent: 5377051 (1994-12-01), Lane et al.
patent: 0469835 (1992-02-01), None
patent: 0536630 (1993-04-01), None
patent: 0542474 (1993-05-01), None
patent: 2267410 (1993-12-01), None

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