Acoustic Howling Detection and Suppression for IP-Based Teleconference Systems

Konferenz: Speech Communication - 13. ITG-Fachtagung Sprachkommunikation
10.10.2018 - 12.10.2018 in Oldenburg, Deutschland

Tagungsband: ITG-Fb. 282: Speech Communication

Seiten: 5Sprache: EnglischTyp: PDF

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Kuehl, Stefan; Anemueller, Carlotta; Antweiler, Christiane; Jax, Peter (Institute of Communication Systems (IKS), RWTH Aachen University, Germany)
Heese, Florian; Vicinus, Patrick (LogMeIn Germany GmbH, Dresden, Germany)

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 features 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.