Fast communication: A widely linear model for stereophonic acoustic echo cancellation

Authors:
Cristian Stanciu;Jacob Benesty;Constantin Paleologu;Tomas GäNsler;Silviu Ciochin
Affiliations:
University Politehnica of Bucharest, 1-3, Iuliu Maniu Blvd., 061071 Bucharest, Romania;INRS-EMT, University of Quebec, Montreal, QC, Canada H5A 1K6;University Politehnica of Bucharest, 1-3, Iuliu Maniu Blvd., 061071 Bucharest, Romania;mh Acoustics, 25-A Summit Avenue, Summit, NJ 07901, USA;University Politehnica of Bucharest, 1-3, Iuliu Maniu Blvd., 061071 Bucharest, Romania
Venue:
Signal Processing
Year:
2013

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Abstract

The stereophonic acoustic echo, due to the coupling between two loudspeakers and two microphones, can be modelled by a two-input/two-output system with real random variables. In this paper, we recast the problem as a single-input/single-output system with complex random variables, by using the widely linear (WL) model, and propose a new distortion method that fits well in this context. In order to illustrate the behavior of this scheme, the recursive least-squares (RLS)-dichotomous coordinate descent (DCD) algorithm is used. Experimental results indicate that the RLS-DCD algorithm represents an attractive choice for this application since it has good numerical features in terms of stability and complexity.