A zero-delay FFT-based subband acoustic echo canceller for teleconferencing and hands-free telephone systems

Author

Chen, J.D.Z. ; Bes, Hugo ; Vandewalle, Joos ; Evers, Ingrid ; Janssens, Paul

Author_Institution

Dept. of Electr. Eng., Katholieke Univ., Leuven, Heverlee, Belgium

Volume

43

Issue

10

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

713

Lastpage

717

Abstract

A new structure of the subband acoustic echo canceller (AEC) is proposed. It introduces no delay in the transmission line. Using the new structure and a simplified weighted overlap-add method, an acoustic echo canceller is designed. The results showed that the designed system has good echo reduction and is stable in nonstationary environments. A hardware implementation of the proposed subband AEC is also presented in this brief

Keywords

adaptive filters; delays; echo suppression; fast Fourier transforms; teleconferencing; telephony; FFT-based echo canceller; hands-free telephone systems; hardware implementation; nonstationary environments; subband acoustic echo canceller; teleconferencing; weighted overlap-add method; zero-delay echo canceller; Convergence; Echo cancellers; Frequency; Least squares approximation; Loudspeakers; Microphones; Sampling methods; Signal processing algorithms; Teleconferencing; Telephony;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.539003

Filename

539003