Acoustic Howling Detection and Suppression for IP-Based Teleconference Systems

Authors:

Kühl, S. ,  Anemüller, C. ,  Antweiler, C. ,  Jax, P. ,  Heese, F. ,  Vicinus, P.

Book Title:

ITG-Fachtagung Sprachkommunikation

Organization:

VDE

Pages:

p.p. 291-295

Date:

Oct. 2018

ISBN:

978-3-80074-767-2

Language:

English

Abstract

IP-based teleconferencing scenarios with multiple participating
devices in the same room like in an open-plan office cause a new
type of feedback problem. Due to the high system delay over the
network, conventional feedback suppression techniques cannot
be used. Therefore, in this paper a new method for detection and
suppression of acoustic howling caused by feedback is proposed.
For detection a combination of correlation- and power-based fea-
tures is utilized, controlling adaptive notch filters for the actual
suppression. It is shown how the detection performs on real world
signals. The full system is applied in a simulation framework,
showing the effectiveness for howling detection and suppression.

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