Encoding apparatus and method using different quantization...

Details Encoding apparatus and method using different quantization... Encoding apparatus and method using different quantization...

H - Electricity

04

N

H04N 7/50 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01)

Patent

CA 2282195

An encoding apparatus and method prevents image deterioration generated by repeatedly performing encoding and decoding by using a quantization matrix for quantization which is different from a quantization matrix for inverse quantization. In the encoding apparatus, a matrix selector selects a first quantization matrix in accordance with the complexity of an encoded picture pattern, and supplies a quantizer with information on the selected first quantization matrix. A matrix unit rewrites, by information on a second quantization matrix, the information described in an encoded stream output from a variable length code unit so that a quantization matrix to be used for inverse quantization is a second quantization matrix different from the first quantization matrix.

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