A new design method for two-channel perfect reconstruction IIR filter banks

Author

Chan, S.C. ; Mao, J.S. ; Ho, K.L.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., China

Volume

7

Issue

8

fYear

2000

Firstpage

221

Lastpage

223

Abstract

In this paper, a new method for designing perfect reconstruction (PR) two-channel causal stable IIR filter banks is introduced. It is based on a structure previously proposed by Phoong et al. (1995). By using a combination of allpass and linear-phase FIR functions, the bumping problem found in the conventional structural PR filter bank is significantly suppressed. The design problem is formulated as a polynomial approximation problem and is solved effectively using the Remez exchange algorithm. Filter banks with flexible stopband attenuation and system delay can readily be obtained using the proposed algorithm.

Keywords

IIR filters; all-pass filters; band-stop filters; channel bank filters; linear phase filters; polynomial approximation; Remez exchange algorithm; allpass functions; bumping problem; design method; flexible stopband attenuation; linear-phase FIR functions; polynomial approximation; system delay; two-channel causal stable IIR filter banks; two-channel perfect reconstruction IIR filter banks; Attenuation; Chebyshev approximation; Delay systems; Design methodology; Filter bank; Finite impulse response filter; Frequency response; IIR filters; Linear approximation; Polynomials;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/97.855446

Filename

855446