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The Optimum Frequency Band Partition for Subband Image Coding in the Rate-Distortion Sense
Haruhiko MIYAZAKI Masashi KAMEDA
A - Abstracts of IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences (Japanese Edition)
Publication Date: 2017/05/01
Online ISSN: 1881-0195
Type of Manuscript: PAPER
image coding, subband image coding, the optimum frequency band partition, rate-distortion optimization,
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In order to improve the coding performance for subband image coding, the optimum frequency band partition which divides the 2-dimensional frequency domain into an adequate set of subbands based on the stochastic characteristics of an input image has been proposed. This paper presents a new optimum frequency band partition which can realize both the optimum partition on the 2-dimensional frequency domain and the optimum combination of quantizers within subband signals in the rate-distortion sense when any bit rate is given. Our experimental results show that PSNR of the proposed method is 1.0[dB] higher than our conventional method at the same bit rate.