Title :
A WLS algorithm for the design of low-delay quadrature mirror filter banks
Author :
Goh, C.K. ; Lim, Y.C.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
This paper presents a weighted lease squares (WLS) algorithm for the design of low-delay quadrature mirror filter (QMF) banks with a prescribed number of zeros of the low-pass filter at ω=π: this is desirable when the filter bank is used for the wavelet decomposition of a signal. The algorithm needs only a few iterations to obtain a solution which optimizes the filter bank design problem in the weighted minimax sense. A design example is provided for illustration
Keywords :
delays; filtering theory; iterative methods; least squares approximations; poles and zeros; quadrature mirror filters; WLS algorithm; filter bank design problem; low-delay QMF banks; low-pass filter zeros; quadrature mirror filter banks; wavelet decomposition; weighted lease squares algorithm; weighted minimax sense; Algorithm design and analysis; Channel bank filters; Delay; Filter bank; Finite impulse response filter; Frequency response; Least squares methods; Low pass filters; Minimax techniques; Mirrors;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.857170
