Title :
An efficient approach for the design of nearly perfect-reconstruction QMF banks
Author :
Zhu, W.P. ; Ahmad, M.O. ; Swamy, M.N.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
fDate :
8/1/1998 12:00:00 AM
Abstract :
In this work, an approach for the design of a class of quadrature mirror filter (QMF) banks is presented based on a combination of IIR analysis filters and FIR synthesis filters. By examining the phase property of the all-pass based analysis filter, a condition on the synthesis part for a perfect reconstruction is established, making it possible to realize a nearly perfect-reconstruction (PR) filter bank by using a nonlinear-phase FIR synthesis filter. The distinct feature of the proposed mixed IIR/FIR filter bank is that it enjoys both a small reconstruction error and a low design and implementation complexity
Keywords :
FIR filters; IIR filters; filtering theory; least squares approximations; quadrature mirror filters; FIR synthesis filters; IIR analysis filters; all-pass based analysis filter; filter bank design; mixed IIR/FIR filter bank; nearly perfect-reconstruction QMF banks; nonlinear-phase synthesis filter; phase property; quadrature mirror filter banks; weighted least square design; Digital filters; Digital signal processing; Filter bank; Finite impulse response filter; IIR filters; Image reconstruction; Mirrors; Signal processing algorithms; Signal synthesis; Transceivers;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
