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

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Wolf, Martin
Nadeu Camprubí, ClimentMés informacióMés informacióMés informació
Document typeConference report
Defense date2010
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
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. 
URIhttp://hdl.handle.net/2117/12063
ISBN1990-9772
Publisher versionhttp://www.isca-speech.org/archive/archive_papers/interspeech_2010/i10_0574.pdf
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  • VEU - Grup de Tractament de la Parla - Ponències/Comunicacions de congressos [436]
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