A digital bandpass/bandstop complementary equalization filter with independent tuning characteristics

Author

Fontana, Federico ; Karjalainen, Matti

Author_Institution

Dipt. di Informatica, Univ. of Verona, Italy

Volume

10

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

119

Lastpage

122

Abstract

A discrete-time realization of first-order (shelving) and second-order equalization filters is developed, providing bandpass/bandstop magnitude-complementary transfer functions. The bandpass transfer function is turned into a complementary one, and vice versa, switching between two structures that share a common allpass section containing the state variables of the equalizer. The present realization is an alternative to existing solutions, particularly in applications where the equalization parameters are dynamically varied.

Keywords

audio signal processing; band-pass filters; band-stop filters; circuit tuning; digital filters; discrete time filters; equalisers; transfer functions; audio systems; bandpass transfer function; bandstop transfer functions; digital filter; discrete-time realization; first-order equalization filters; independent tuning characteristics; magnitude-complementary transfer functions; second-order equalization filters; shelving filters; tunable filters; Band pass filters; Cutoff frequency; Delay; Digital filters; Equalizers; Graphics; Hafnium; Signal processing; Transfer functions; Tuning;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2003.808546

Filename

1186769