Doubletalk detection by means of spectral content

Details Doubletalk detection by means of spectral content Doubletalk detection by means of spectral content

1997-01-15

1998-03-24

Hong, Harry S.

Telephonic communications

Echo cancellation or suppression

379389, 379410, H04M 120, H04M 908

Patent

active

057321345

ABSTRACT:
A method and apparatus are described for detecting doubletalk in an acoustic echo canceller. The present invention examines the spectral characteristic of the near-end audio signal and the spectral characteristics of the far-end audio signal and determines from the comparison if a condition of doubletalk exists. An exemplary implementaion of the present invention is presented in an acoustic echo canceller wherein the adaptation of the adaptive filter taps is inhibited during periods of doubletalk.

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patent: 5014263 (1991-05-01), Vairavan et al.
patent: 5193112 (1993-03-01), Sano
patent: 5263019 (1993-11-01), Chu
patent: 5263020 (1993-11-01), Yatsuzuka et al.
patent: 5278900 (1994-01-01), Van Gerwen et al.
patent: 5343521 (1994-08-01), Jullien et al.

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