Convergence analysis of stereophonic echo canceller with pre-processing-relation between pre-processing and convergence

Authors:
A. Hirano;K. Nakayama;K. Watanabe
Affiliations:
Fac. of Eng., Kanazawa Univ., Japan;-;-
Venue:
ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 02
Year:
1999

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Efficient fast stereo acoustic echo cancellation based on pairwise optimal weight realization technique

EURASIP Journal on Applied Signal Processing

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Abstract

This paper presents convergence characteristics of stereophonic echo cancellers with pre-processing. The convergence analysis of the averaged tap-weights show that the convergence characteristics depends on the relation between the impulse response in the far-end room and the changes of the pre-processing filters. Examining the uniqueness of the solution in the frequency domain leads us to the same relation. Computer simulation results show the validity of these analyses.