| Paper: | SP-L10.5 | ||
| Session: | Multichannel Speech Enhancement | ||
| Time: | Friday, May 21, 14:20 - 14:40 | ||
| Presentation: | Lecture | ||
| Topic: | Speech Processing: Speech Enhancement | ||
| Title: | MULTIPLE-MICROPHONE TIME-VARYING FILTERS FOR ROBUST SPEECH RECOGNITION | ||
| Authors: | Calvin Lai; University of Toronto | ||
| Parham Aarabi; University of Toronto | |||
| Abstract: | A multiple microphone time varying filter that is an extention of the dual-microphone speech enhancement technique of [Aarabi'ICME 2003] is proposed andexperimentally analyzed. The technique utilizes information regarding the locations of the speech source of interest and the microphones to compute a time varying filter that results in substantial noise reduction over other speech enhancement techniques such as delay-and-sum beamforming and superdirective beamforming.For example, digit recognition results in an environment with two speakers and a reverberation time of 0.1s show a recognition accuracyrate increase of 25.2\% over delay-and-sum beamforming and an increase of 26.5\% over superdirective beamforming using six microphones. | ||
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