Double-talk detection for adaptive noise canceller

A double-talk detection method for the adaptive-noise canceller is presented. The method is based on the correlation of the exponential weighted square sum and has the following features: no parameter needs to be known beforehand; the result is less affected by path variation; the distortion to the desired signal can be suppressed; the computational complexity can be reduced by decimation; and the method can be applied to the adaptive echo canceller. The validity of the method is demonstrated by a theoretical analysis. Computer simulation was used to obtain the results presented.