Title :
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
fDate :
10/1/1996 12:00:00 AM
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;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
