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

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。

The wavelet transform has good local performance in both time(spatial)and l'requency domain. The two-dimensional discrete wavelet transform will be anearly ideal subband analysis/synthesis subsystem in the image subband coding system. This paper presents a method to implement the two-dimensional discretewavelet transform using the one- dimensional discrete wavelet transform. The paperalso proposes the filter implementation structures of two-dimensional discrete forward wavelet transform(DWT)and the inverse ...