13th Annual Conference of the International Speech Communication Association

Portland, OR, USA
September 9-13, 2012

Beamforming Using Uniform Circular Arrays for Distant Speech Recognition in Reverberant Environments and Double Talk Scenarios

Hannes Pessentheiner (1), Stefan Petrik (2), Harald Romsdorfer (1,2)

(1) Signal Processing and Speech Communication Laboratory, Graz University of Technology, Austria
(2) Synvo GmbH, Leoben, Austria

Beamforming is crucial for hands-free mobile terminals and voice-enabled automated home environments based on distant-speech interaction to mitigate causes of system degradation, e.g., interfering noise sources or competing speakers. This paper presents an adaptation of the most common state-of-the-art broadband beamformers to uniformcircular arrays, such that competing speakers are attenuated sufficiently for distant speech recognition. As a result, a new beamformer is presented. Finally, the speech quality of the beamformers' enhanced signals is evaluated with different objective speech quality measures and a word recognizer as a measure for the attenuation of competing speakers.

Index Terms: array signal processing, beamforming, uniform circular array, reverberant environment, double-talk, distant speech recognition

Full Paper

Bibliographic reference.  Pessentheiner, Hannes / Petrik, Stefan / Romsdorfer, Harald (2012): "Beamforming using uniform circular arrays for distant speech recognition in reverberant environments and double talk scenarios", In INTERSPEECH-2012, 1368-1371.