| 摘要 |
The present invention is provided with a wavelet conversion means 115 for performing a wavelet conversion process of either of the number of lines 1 to 4 for image data, a prediction difference means 116 for performing a prediction difference process to the minimum frequency subband of a plurality of subbands obtained by the wavelet conversion process 115, a range coder encoding means 117 for performing an entropy encoding process to the respective subbands obtained by the wavelet conversion process based on a result of the prediction difference process, and a decode processing portion 120, in which the image data is reconstructed from the code obtained by the entropy encoding process.
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