Image coding and decoding methods, image coding and decoding apparatuses, and recording media for image coding and decoding programs

申请公布号：US7505631(B2)

申请号：US20080007562

申请日期：2008.01.11

申请公布日期：2009.03.17

申请人：

PANASONIC CORPORATION

发明人：BOON CHOONG SENG

分类号：G06K9/36;G06K9/46;G06T9/00;H03M7/42;H04N7/26;H04N7/30;H04N7/50

主分类号：G06K9/36

摘要：In an image coding method of the present invention, after a process such as DCT is performed to digital image data, quantization process is performed, and then, to resultant quantized transform coefficients, variable length coding process is performed with reference to a variable length code table showing how variable length codes are allocated, and in a comparison process between an event derived from the quantized transform coefficients and a reference event included in the variable length code table, transformation process is performed to increase a possibility of performing variable length coding with satisfactory coding efficiency.

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