Inter-channel coherence reduction method for stereophonic acoustic echo cancellation

A novel perceptually transparent decorrelation method for stereo (and multichannel) echo cancellation (SAEC, MAEC) systems is described in this paper. It is based on combining a previously known phase modulation technique with a magnitude modulation component. The new method is more effective at decreasing correlation for frequencies below 1 kHz, a region where it is most important to have stable echo cancellation performance in a speech communication system.

[1]  Murtaza Ali,et al.  Stereophonic acoustic echo cancellation system using time-varying all-pass filtering for signal decorrelation , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[2]  A stereo echo canceler with pre-processing for correct echo-path identification , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[3]  N. Durlach,et al.  Chapter 10 – BINAURAL PHENOMENA , 1978 .

[4]  Jacob Benesty,et al.  A better understanding and an improved solution to the specific problems of stereophonic acoustic echo cancellation , 1998, IEEE Trans. Speech Audio Process..

[5]  Jacob Benesty,et al.  New insights into the stereophonic acoustic echo cancellation problem and an adaptive nonlinearity solution , 2002, IEEE Trans. Speech Audio Process..

[6]  J. L. Hall,et al.  Stereophonic acoustic echo cancellation-an overview of the fundamental problem , 1995, IEEE Signal Processing Letters.

[7]  Karin Ackermann,et al.  Advances In Network And Acoustic Echo Cancellation , 2016 .

[8]  Karlheinz Brandenburg,et al.  Second Generation Perceptual Audio Coding: The Hybrid Code , 1990 .

[9]  Walter Kellermann,et al.  Acoustic Echo Cancellation for Surround Sound using Perceptually Motivated Convergence Enhancement , 2007, 2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07.

[10]  Jacob Benesty,et al.  Advances in Network and Acoustic Echo Cancellation , 2001 .