APPLICATIONS OF COMPLEX-VALUED WAVELET TRANSFORMS TO SUBBAND DECOMPOSITION

被引：78

作者：

LAWTON, W

机构：

[1] Institute of Systems Science, National University of Singapore, Kent Ridge

来源：

IEEE TRANSACTIONS ON SIGNAL PROCESSING | 1993年 / 41卷 / 12期

关键词：

Complex valued wavelet transforms - Subband decomposition;

D O I：

10.1109/78.258098

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A method for constructing complex valued linear phase FIR conjugate quadrature filters and associated wavelet bases is described. Each filter is derived by replacing certain zeros of a real valued FIR conjugate quadrature filter by their reciprocal conjugates. The derived filters have the same frequency response magnitudes as the original filters and their liner phase property permits the use of symmetrization in subband decomposition to avoid border discontinuities that result from signal periodization. Subband decomposition and reconstruction using both a length 6 filter associated with a Daubechies wavelet bases and a related length 6 complex valued linear phase filter are compared to illustrate the reduced border effects.

引用

页码：3566 / 3568

页数：3