Echo canceller for non-linear circuits

Details Echo canceller for non-linear circuits Echo canceller for non-linear circuits

1996-07-24

1998-08-18

Hong, Harry S.

Telephonic communications

Echo cancellation or suppression

379410, 379411, 381 7111, 370291, H04M 900

Patent

active

057968195

ABSTRACT:
A system and a method for echo suppression which use two or more microphones for beamforming of an echo signal corresponding to an incoming speech signal that is output by a loudspeaker. The outputs of the microphones are appropriately filtered and then linearly combined to cancel the echo signal, even if the incoming speech signal has been non-linearly distorted. Also, the microphones may be selectively positioned or pointed to allow the linear cancellation of ambient noise.

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Kuo, Sen M., Huang, Yu C., and Pan, Zhibing, "Acoustic Noise and Echo Cancellation Microphone System for Desktop Conferencing", The Proceedings of the 6th International Conference on Signal Processing Applications and Technology (ICSPAT), pp. 41-45 (Oct. 1995).

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