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

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5 Author(s)
Chen, J.D.Z. ; Dept. of Electr. Eng., Katholieke Univ., Leuven, Heverlee, Belgium ; Bes, H. ; Vandewalle, Joos ; Evers, I.
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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

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Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:43 ,  Issue: 10 )