T. Gansler et J. Benesty, Stereophonic acoustic echo cancellation and two-channel adaptive filtering: an overview, INT J ADAPT, 14(6), 2000, pp. 565-586
Citations number
29
Categorie Soggetti
AI Robotics and Automatic Control
Journal title
INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING
Stereophonic acoustic echo cancellation (SAEC), has been studied since the
early 1990s. Because of spatial realism, two-channel audio is now becoming
more interesting in a number of hands-free applications such as teleconfere
ncing, multi-participant desktop conferencing, and televideo gaming. From a
theoretical point of view, SAEC differs considerably from traditional mono
echo cancellation since the normal equation to be solved by the adaptive a
lgorithm is singular. Of course, this also affects the practical considerat
ions that have to be made when designing a SAEC system, e.g. choice of adap
tive algorithm. This paper reviews the basic theory behind SAEC, solutions
to the singularity problem, and a number of classical two-channel adaptive
algorithms suited to the problem. Copyright (C) 2000 John Wiley & Sons, Ltd
.