Method and apparatus for coding image information, method...

Details Method and apparatus for coding image information, method... Method and apparatus for coding image information, method...

2007-08-09

2010-06-08

An, Shawn (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240250, C375S240260, C375S240050, C375S240200, C375S240180, C382S233000, C382S235000, C382S251000, C382S250000, C382S248000

Reexamination Certificate

active

07733955

ABSTRACT:
An image information decoding method for decoding compressed image information which has been coded via a process including dividing an input image signal into blocks, performing an orthogonal transform on the blocks on a block-by-block basis, and quantizing resultant orthogonal transform coefficients. The decoding process includes performing dequantization such that a quantization parameter is weighted by an addition operation, and the dequantization is performed on each chroma components of the quantized coefficients using said weighted quantization parameter, and performing an inverse orthogonal transform.

REFERENCES:
patent: 6385242 (2002-05-01), Chen
patent: 6385247 (2002-05-01), De With et al.
patent: 6445739 (2002-09-01), Shen et al.
patent: 6834080 (2004-12-01), Furukawa et al.
patent: 11-243545 (1999-09-01), None
VCEG, “Low complexity (I) DCT”, VCEG-N43, ITU-Telecommunications Standardization Sector, Sep. 2001, pp. 1-4.

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