ENCODER, DECODER, CODE DECODING SYSTEM, ENCODING METHOD, DECODING METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To reduce image data in encoding.

SOLUTION: Subband source image information is generated by subband-dividing source image information for each of a plurality of spatial frequencies, the amplitude information of the subband source image information (called "object subband source image information", hereinafter) on a high frequency band side or a low frequency band side (called "object frequency band side", hereinafter) is obtained, and the amplitude information of the object subband source image information and the subband source image information (called "non-object subband source image information", hereinafter) other than the object subband source image information are output.

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