一种提升小波变换的VLSI结构设计  

A VLSI Architecture Design for Lifting Wavelet Transform

作　　者：沈峰[1] 黄勇[1] 庄锁法[1] 赵艳红[1] SHEN Feng,HUANG Yong,ZHUANG Shuo-fa,ZHAO Yan-hong（Anhui Science and Technology University,Fengyang 233100,China）

机构地区：[1]安徽科技学院,安徽凤阳233100

出　　处：《电脑知识与技术》2010年第12期9807-9809,共3页Computer Knowledge and Technology

基　　金：安徽科技学院引进人才项目（ZRC2008181）

摘　　要：离散小波变换（DWT）计算量大,为了开发实时的JPEG2000图像/视频处理系统就需要设计针对DWT的专门芯片或自定制VLSI芯片。一维小波变换单元设计是整个DWT单元的关键部分。采用CSD（Canonic Signed-Digit）编码优化算法把乘法转换为移位加法,精简9/7小波变换和5/3小波变换通路,在传统长流线结构的基础上提出一种运算速度快、硬件面积使用较少的一维正向小波变换结构方案。实验结果表明,该方案达到预期目的,方案可行。Large amount of the discrete wavelet transform（DWT） is needed,in order to have JPEG2000 image/video processing system to meet the real-time,it is essential to develop the specialized chips or custom VLSI chips about DWT.One-dimensional wavelet transform is a key part of the whole DWT system design.CSD（Canonic Signed-Digit）encoding algorithm is used to convert multiplication to displacement and addition.9/7 wavelet transform and 5 / 3 wavelet transform passageway is simplified.It is presented that one-dimensional forward wavelet transform structure with a fast speed and less hardware realization area based on the traditional long flow pipeline structure.Experiment results show that the intended purpose of the structure is achieved,and it is feasible.

关 键 词：离散小波变换 JPEG2000 CSD编码 VLSI设计 长流水线 

分 类 号：TP391[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]