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Acoustic echo cancellation for stereophonic systems derived from pairwise panning of monophonic speech

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3 Author(s)
Reed, M.J. ; Dept. of Electron. Syst. Eng., Univ. of Essex, Colchester, UK ; Hawksford, M.O. ; Hughes, P.

An algorithm is introduced that performs stereophonic acoustic echo cancellation (SAEC) for systems using pairwise panning of a single monophonic source to provide the effect of spatialisation. The technique exploits the inherent high correlation between the loudspeaker signals, unlike other general SAEC techniques, which try to utilise any small uncorrelated features in the signals. The algorithm maintains a single aggregate echo path estimate that is updated using normalised least mean square (NLMS) and the knowledge of any change in the spatialisation. Consequently, it achieves a computational complexity that is of the same order as a single channel NLMS algorithm.

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Vision, Image and Signal Processing, IEE Proceedings -  (Volume:152 ,  Issue: 1 )