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DCT-based Embedded Image Sequence Coding and Bit Allocation Scheme  

Cheong, Cha-Keon (Hoseo Univ. The School of Electrical Engineering)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.39, no.6, 2002 , pp. 575-584 More about this Journal
Abstract
This paper presents a novel DCT-based embedded zero-tree coding and optimal bit allocation algorithm for image sequence coding. In order to fully utilize the structure of the conventional standard coding algorithm and improve the coding efficiency, motion estimation and compensation(ME/MC)-DCT hybrid coding structure and a modified zero-tree coding algorithm are applied. After the rearrangement DCT coefficients into pyramidal structure according to their significance on the decoded image quality, the modified embedded zero-tree coding is performed on layered coefficients. Moreover, for a given overall bit rates, a new optimal bit control scheme is proposed to achieve the best decoded image quality in the consecutive frames. The rate control scheme can also provide the equal quality of decoded image with the control of bit rate and distortion for each frame. The various simulation results are provided to evaluate the coding performance of the proposed scheme.
Keywords
DCT;임베디드 제로트리 부호화;비트배분;최적 비트율 제어;복호영상;
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