On the potential of channel selection for recognition of reverberated speech with multiple microphones

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Document typeConference report
Defense date2010
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Abstract
The performance of ASR systems in a room environment with distant microphones is strongly affected by reverberation. As
the degree of signal distortion varies among acoustic channels (i.e. microphones), the recognition accuracy can benefit from a
proper channel selection. In this paper, we experimentally show that there exists a large margin for WER reduction by channel selection, and discuss several possible methods which do not require any a-priori classification. Moreover, by using a
LVCSR task, a significant WER reduction is shown with a simple technique which uses a measure computed from the sub-band time envelope of the various microphone signals.
CitationWolf, M.; Nadeu Camprubí, C. On the potential of channel selection for recognition of reverberated speech with multiple microphones. A: Annual Conference of the International Speech Communication Association. "Proceedings of the 11th Annual Conference of the International Speech Communication Association (INTERSPEECH 2010)". 2010, p. 574-577. ISBN 1990-9772.
ISBN1990-9772
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