摘要
作为设计两带双正交滤波器组和子波的有效方法 ,提升方法 (LiftingScheme)已广泛应用于子波构造、自适应子带编码等众多领域 .本文利用三带提升方法构造了一类具有阻带零点抑制的三带双正交复内插子波 .阻带零点抑制是比消失矩约束更为严格的设计条件 ,能够更有效地控制滤波器的阻带特性 .不同于传统的滤波器组 ,这类复滤波器组和子波具有分割正负频率分量在不同通道的能力 .
As an efficient methodology to design biorthogonal filter-banks and wavelets, the lifting scheme has been widely applied to many fields such as construction of wavelets and design of adaptive subband coders. Utilizing the three-band lifting scheme, the paper designs a novel family of biorthogonal interpolating complex wavelets with stopband zero suppression. The stopband zero suppression is a stricter design constraint than the vanishing moments, and can more effectively manipulate the stopband characteristics of filters. Unlike the traditional design, complex filterbanks and wavelets designed provide the ability to partition the positive and negative frequency components into different channels/subbands.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第6期837-841,共5页
Acta Electronica Sinica
基金
国家自然科学基金 (No 69972 0 38
No 60 2 72 0 58)
国家优秀博士学位论文作者专项基金 (No 2 0 0 1 39)
高等学校优秀青年教师科研奖励计划
