Paper Info
Title
Multi-microphone acoustic echo cancellation using multi-channel warped linear prediction of common acoustical poles
Abstract
A computationally cheap extension from single-microphone acoustic echo cancellation (AEC) to multi-microphone AEC is presented for the case of a single loudspeaker. It employs the idea of common-acoustical-pole and zero modeling of room transfer functions (RTFs). The RTF models used for multi-microphone AEC share a fixed common denominator polynomial, which is calculated off-line by means of a multi-channel warped linear prediction. By using the common denominator polynomial as a prefilter, only the numerator polynomial has to be estimated recursively for each microphone, hence adapting to changes in the RTFs. This approach allows to decrease the number of numerator coefficients by one order of magnitude for each microphone compared with all-zero modeling. In a first configuration, the prefiltering is done on the adaptive filter signal, hence achieving a pole-zero model of the RTF in the AEC. In a second configuration, the (inverse) prefiltering is done on the loudspeaker signal, hence achieving a dereverberation effect, in addition to AEC, on the microphone signals.
Year
Venue
Keywords
2010
Aalborg
echo suppression,microphones,polynomial approximation,rtf,common acoustical poles,fixed common denominator polynomial,microphone signals,multichannel warped linear prediction,multimicrophone aec,multimicrophone acoustic echo cancellation,numerator polynomial,room transfer functions,single loudspeaker,polynomials,acoustics,loudspeakers,attenuation,mathematical model
Field
DocType
ISSN
Polynomial,Linear prediction,Transfer function,Adaptive filter,Acoustics,Attenuation,Loudspeaker,Mathematics,Fraction (mathematics),Microphone
Conference
2219-5491
Citations 
PageRank 
References 
0
0.34
2
Authors
4
Name
Order
Citations
PageRank
Pepe Gil-Cacho100.34
Toon van Waterschoot215714.29
Marc Moonen33673326.91
Søren Holdt Jensen41362111.79