@inproceedings{basu2006acoustic,
author = {Basu, Sumit},
title = {Acoustic Echo Cancellation in a Channel with Rapidly Varying Gain},
year = {2006},
month = {July},
abstract = {We present a method for performing acoustic echo cancellation in a channel with rapidly varying gain and thus a rapidly varying channel characteristic. This is a situation in which standard AEC approaches perform poorly. Our method involves learning a scale-free channel characteristic (H~). We then apply this to a windowed version of the signal and remove the projection of the transformed signal from the output signal. We also develop a "ramp projection" that allows for a linear variation in gain within the window. We show results in a telephony application with 3 dB to more than 8 dB of improvement over conventional AEC using the simple projection and an additional 1 dB using the ramp projection.},
publisher = {Institute of Electrical and Electronics Engineers, Inc.},
url = {http://approjects.co.za/?big=en-us/research/publication/acoustic-echo-cancellation-in-a-channel-with-rapidly-varying-gain/},
}