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