Method and apparatus for adaptive echo and noise control

Details Method and apparatus for adaptive echo and noise control Method and apparatus for adaptive echo and noise control

2006-06-20

2006-06-20

Swerdlow, Daniel (Department: 2615)

Telephonic communications

Echo cancellation or suppression

Combined diverse function

C379S392010

Reexamination Certificate

active

07065206

ABSTRACT:
A method and apparatus for adaptive echo and noise control. A signal can be received at an input to a communication or electronic device. Background noise in the signal can be determined. The order of noise suppression and echo cancellation can be adaptively determined based on the background noise in the signal. Adaptively determining the order of noise suppression and echo cancellation can be performed by comparing the background noise to at least one threshold, performing echo cancellation prior to noise suppression on the signal if the background noise is below the at least one threshold, and performing noise suppression prior to echo cancellation on the signal if the background noise is above the at least one threshold.

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Regine Le Bouquin Jeannes, Pascal Scalart, Gerard Faucon and Christophe Beaugeant, “Combined Noise and Echo Reduction in Hands-Free Systems: A Survey”, IEEE Transactions on Speech and Audio Processing, vol. 9, No. 8, Nov. 2001, 13 pages.

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