A Robust Double-Talk Detector for Acoustic Echo Cancellation
Junghsi Lee, Hsu-Chang Huang · 2010
Abstract—A reliable double-talk detector (DTD) plays an important role in acoustic echo cancellation (AEC). This paper proposes a robust DTD equipped with a near-end voice detector, a double-to-single detector, and two auxiliary filters. The new scheme gives the AEC a better chance of saving good estimate of echo path when entering double-talk mode and properly determining double to single-talk mode. The proposed DTD system responds well in the transition of double-talk and single talk and is capable of differentiating echo path changes from double-talk. Extensive simulations demonstrated that our DTD outperforms existing schemes during double-talk and echo path changes. Index Terms—Acoustic echo cancellation, double-talk detector, adaptive filter, NLMS. I.