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基于整数小波变换的零树编码的多位平面并行算法

Multi-bit-plane parallel algorithm for integer square zerotree wavelet coding
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摘要 为了解决整数小波变换与传统零树编码(EZW)算法相结合产生的量化阈值的选取问题,有人提出了基于整数平方量化阈值的零树编码(ISZW)算法。但是,由于ISZW使用连续的整数平方作为量化阈值,缩短了相邻阈值间的距离,却增加了编码的次数,降低了编码速度。为此设计了基于整数小波变换的零树编码的多位平面并行算法,其中每个位平面的编码仅需对位平面进行一遍扫描,大大提高了ISZW的编码速度。 In order to solve the threshold-choosing problem caused by combining integer wavelet transform with traditional Embedded Zerotree Wavelet coding(EZW), Integer Square Zerotree Wavelet coding (ISZW) algorithm was proposed. Since ISZW used successive integer squares as quantization thresholds, it shortened the distance between two consecutive throsholds, but increased coding times, thus reduced coding speed. To solve this problem, a parallel multi-bit-plane coding algorithms for ISZW was presented, which required scanning each bit-plane only once, so greatly improved the coding speed of ISZW.
出处 《计算机应用》 CSCD 北大核心 2006年第7期1573-1576,共4页 journal of Computer Applications
基金 国家自然科学基金项目(10171033) 广东省自然科学重点基金项目(05103541 31340) 江西省自然科学基金项目(991810)
关键词 整数小波变换 零树编码 量化阈值 多位平面并行 integer wavelet transform Embedded Zerotree Wavelet coding( EZW) quantization threshold parallel multi-bit-plane coding
作者简介 钟萃相(1965-),男,江西崇义人,博士研究生,主要研究方向:多媒体技术;(cuixiang_zhong@sohu.com) 韩国强(1963-),男,江西抚州人,教授,博士生导师,主要研究方向:多媒体技术; 黄明和(1955-),男,江西南昌人,教授,硕士.主要研究方向:算法、并行处理.
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