Design of Real and Complex Linear-Phase IIR Modified QMF Banks

Author

Fernandez-Vazquez, Alfonso ; Jovanovic-Dolecek, Gordana

Author_Institution

Dept. of Electron., INAOE, Puebla

fYear

2006

fDate

4-7 Dec. 2006

Firstpage

1063

Lastpage

1066

Abstract

A design of linear-phase IIR (infinite impulse response) modified QMF banks including both real and complex valued coefficients is proposed. This design is based on parallel structure of two complex allpass filters. We first introduce a complex analog allpass filter, designed using elliptic functions and the PR (perfect reconstruction) conditions. We use bilinear transformation to obtain the digital counterpart of this analog allpass filter. Depending on the parity of the order N of the complex allpass filter, the resulting IIR filters in the filter bank can be either real or complex. If N is even, the IIR filters are real, otherwise they are complex. Using complex IIR analysis filters, the corresponding magnitude responses have an extra zero around omega = 3pi/2. The method is illustrated by means of examples

Keywords

IIR filters; all-pass filters; channel bank filters; elliptic filters; linear phase filters; quadrature mirror filters; bilinear transformation; complex analog allpass filter; complex linear-phase IIR; elliptic functions; filter banks; infinite impulse response modified QMF banks; parallel structure; perfect reconstruction conditions; Analysis of variance; Delay; Digital filters; Filter bank; Frequency; IIR filters; Image coding; Image reconstruction; Passband; Phase distortion; IIR filters; all-pass filters; filter banks; linear-phase filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0387-1

Type

conf

DOI

10.1109/APCCAS.2006.342272

Filename

4145580