Echo cancellation/suppression and double-talk detection in...

Details Echo cancellation/suppression and double-talk detection in... Echo cancellation/suppression and double-talk detection in...

2007-05-01

2007-05-01

Singh, Ramnandan (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406010, C379S406070, C379S406110

Reexamination Certificate

active

10765465

ABSTRACT:
A method of suppressing an echo signal in a communication path such as acoustic coupling between a speaker and a microphone in a telephone device handset includes the steps of monitoring a transmitted signal supplied to the communication path to determine an attribute thereof; generating a leaky mask based on the determined attribute and an attribute of a received echo signal; and partially cancelling the received echo signal using the leaky mask.

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Gustafsson et al., “Combined Acoustic Echo Control and Noise Reductions for Hands Free Telephony,” Signal Processing, vol. 64 Jan. 1998, pp. 21-32.
Martin, “Noise Power Spectral Density Estimation Based on Optimal Smoothing and Minimum Statistics,” IEEE Transactions on Speech and Audio Processing, vol. 9, No. 5, Jul. 2001, pp. 504-512.

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