Clustering of ad-hoc microphone arrays for robust blind beamforming
Himawan, Ivan, McCowan, Iain, & Sridharan, Sridha (2010) Clustering of ad-hoc microphone arrays for robust blind beamforming. In Douglas, Scott (Ed.) Proceedings of IEEE Conference on Acoustics, Speech, and Signal Processing 2010, IEEE Xplore, Sheraton Hotel, Dallas, Texas, 2814 -2817 .
This paper proposes a clustered approach for blind beamfoming from ad-hoc microphone arrays. In such arrangements, microphone placement is arbitrary and the speaker may be close to one, all or a subset of microphones at a given time. Practical issues with such a configuration mean that some microphones might be better discarded due to poor input signal to noise ratio (SNR) or undesirable spatial aliasing effects from large inter-element spacings when beamforming. Large inter-microphone spacings may also lead to inaccuracies in delay estimation during blind beamforming. In such situations, using a cluster of microphones (ie, a sub-array), closely located both to each other and to the desired speech source, may provide more robust enhancement than the full array. This paper proposes a method for blind clustering of microphones based on the magnitude square coherence function, and evaluates the method on a database recorded using various ad-hoc microphone arrangements.
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|Item Type:||Conference Paper|
|Keywords:||Array Signal Processing, Speech Enhancement|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Signal Processing (090609)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > Institutes > Information Security Institute
Past > Schools > School of Engineering Systems
|Copyright Owner:||Copyright 2010 The Institute of Electrical and Electronics Engineers, Inc.|
|Copyright Statement:||Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
|Deposited On:||06 Apr 2010 08:46|
|Last Modified:||01 Mar 2012 00:16|
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