A survey of double-talk detection schemes for echo cancellation applications

Thien-An Vu, Heping Ding, Martin Bouchard

Abstract


Double-talk (DT) detection schemes for echo cancellation based on energy comparison and cross-correlation algorithms are presented. It was found that the correlation-based algorithms show improved detection performance in such time-varying environment. These algorithms however require high memory storage and computational complexity due to vector or matrix-based operations. The energy-based algorithms are computationally simple, needing very little memory, but they do not always provide reliable performance in an acoustic echo path environment.

Keywords


Adaptive filtering; Algorithms; Computational complexity; Echo suppression; Impulse response; Matrix algebra; Parameter estimation; Signal detection; Signal receivers; Vectors; Double-talk detection; Echo paths; Energy-based algorithms; Filter adaptation

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