一种二维离散子波变换的滤波器结构  

A Filter Structure of Two Dimensional Discrete Wavelet Transform

作　　者：殷瑞祥[1] 马维祯[1] 

机构地区：[1]华南理工大学电子与电工技术教研室

出　　处：《信号处理》1996年第2期97-104,共8页Journal of Signal Processing

基　　金：国家自然科学基金;广东省科委科学基金

摘　　要：子波变换具有良好的时间（空间）频率局部化性能，在图象子带编码中二维离散子波变换是一种接近理想的子带分析／综合子系统．本文提出一种利用一维离散子波变换实现二维有限长离散子波变换的方法，同时给出了二维离散子波正变换（DWT）和反变换（IDWT）的滤波器实现结构．实验结果表明新的方法具有良好的重构性，完全适用于图象压缩编码系统中的分析／综合子系统．The wavelet transform has good local performance in both time(spatia) and frequency.The two dimensional desorete wavelet transform will be a near ideal subband analysis/synthesis subsystem in the image subband coding system. This paper presents a method to implement the tow dimensional discrete wavelet transform using the one dimensional disccrete wavelet transform Teh paper also propoes the filter implementation structures of tow dimensional discrete forward wavelet transform (DWT) and the inverse trransform (IDWT).The experiment resuits demonstrate that the new method of para-symmetric extension has good performance of reconstruction and is subband analysis/synthesis subsystem of image compression coding.

关 键 词：子波变换 子带编码 滤波器 图象编码 

分 类 号：TN919.8[电子电信—通信与信息系统] TN713.03[电子电信—信息与通信工程]