Abstract
In subband image coding, the optimum frequency band partition was previously proposed on the basis of the power spectrum of an input image. However, the partition pattern on the 2-D frequency domain was invariable when the bit rate changed. Therefore, a new optimum frequency band partition has been developed that can determine both the partition pattern on the 2-D frequency domain and the combination of quantizers with subband signals for the given bit rate. The experimental results show that the proposed method improved the coding performances at the lower bit rate compared with the conventional method.
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