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Journal Article

Robust and Efficient Implementation of the PEM—AFROW Algorithm for Acousic Feedback Cancellation

Authors: Rombouts, Geert; Van Waterschoot, Toon; Moonen, Marc

Journal of the Audio Engineering Society · Volume 55 · Issue 11 · pp. 955–966 · November 2007

Abstract

The PEM-AFROW algorithm has been developed to model a room impulse response under closed-loop conditions, such as in microphone-amplifier-loudspeaker systems, and is particularly suited for a speech signal input. If a controller is inserted in the loop that uses this model to remove the loudspeaker signal component from the microphone signal, an efficient feedback cancellation can be performed. Crucial implementation-oriented issues that have not been studied so far are addressed. In particular, adaptation control mechanisms are proposed for feedback cancellation based on PEM-AFROW, and efficient subband and frequencydomain implementations are provided for this algorithm.

Details

Publication
Journal of the Audio Engineering Society
Volume
55
Issue
11
Pages
955–966
Publication date
November 6, 2007
Affiliation
Katholieke Universiteit Leuven ESAT/SCD, Heverlee, Belgium (See document for exact affiliation information.)
Type
Journal Article