Title :
A frequency domain doubletalk detector based on cross-correlation and extension to multi-channel case
Author :
Iqbal, Mohammad Asif ; Grant, Steven L. ; Stokes, Jack W.
Author_Institution :
Qualcomm, Inc., San Diego, CA, USA
Abstract :
Most teleconferencing conversations are conducted in the presence of Acoustic echoes. Typically an adaptive filter is used to cancel the echo, with a control device called the doubletalk detector which controls the adaptation. We derive a novel test statistic for the doubletalk detection based on the cross-correlation between the microphone signal and the cancellation error for the frequency domain adaptive algorithm. The main advantage of the proposed algorithm is its simplicity and computational efficiency. We compare our results with the normalized cross-correlation based doubletalk detector proposed. We also generalize the idea of the proposed doubletalk detector (single-channel) to the matrix case (multi-channel).
Keywords :
adaptive filters; correlation methods; echo suppression; signal detection; speech processing; statistical testing; acoustic echo; adaptive filter; cancellation error; cross-correlation; echo cancellation; frequency domain adaptive algorithm; frequency domain doubletalk detector; microphone signal; multichannel case; single-channel case; teleconferencing conversation; test statistic; Acoustic devices; Acoustic signal detection; Acoustic testing; Adaptive filters; Adaptive signal detection; Detectors; Error analysis; Frequency domain analysis; Statistical analysis; Teleconferencing;
Conference_Titel :
Signals, Systems and Computers, 2009 Conference Record of the Forty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4244-5825-7
DOI :
10.1109/ACSSC.2009.5469918