A stereo echo canceller with simultaneous input-sliding and sliding-period control

This paper proposes a stereo echo canceller with simultaneous input-sliding and sliding-period control. Periodic delays with different phases in two channels provide an additional condition for echo cancellation, leading to faster convergence. It also guarantees symmetrical shifts of a sound image around its original position for better subjective quality of the far-end signal. Sliding-period control with more slides for less interchannel correlation of the input signals achieves less noticeable sliding artifacts and faster convergence simultaneously. Subjective evaluation results demonstrate that simultaneous sliding achieved comparable far-end signal (FES) quality to that of the original FES. It is also shown that sliding-period control tops up 14% improvement in convergence time without trading off the subjective quality of the FES.

[1]  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..

[2]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[3]  S. Bergman.  The SR Report on The MPEG/Audio Subjective Listening Test Stockholm April/May 1991 , 1991 .

[4]  Yann Joncour,et al.  A stereo echo canceler with correct echo-path identification based on an input-sliding technique , 1997, IEEE Trans. Signal Process..

[5]  Akihiko Sugiyama,et al.  A stereo echo canceller with simultaneous 2-channel input slides for fast convergence and good sound localization , 2009, 2009 17th European Signal Processing Conference.

[6]  Jacob Benesty,et al.  A better understanding and an improved solution to the problems of stereophonic acoustic echo cancellation , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[7]  Akihiro Hirano,et al.  A compact multi-channel echo canceller with a single adaptive filter per channel , 1992, [Proceedings] 1992 IEEE International Symposium on Circuits and Systems.

[8]  R. Botros,et al.  Stereophonic speech teleconferencing , 1986, ICASSP '86. IEEE International Conference on Acoustics, Speech, and Signal Processing.

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

[10]  D.R. Morgan,et al.  Acoustic Echo Cancellation for Stereophonic Teleconferencing , 1991, Final Program and Paper Summaries 1991 IEEE ASSP Workshop on Applications of Signal Processing to Audio and Acoustics.