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MULTIPLE-MICROPHONE TIME-VARYING FILTERS FOR ROBUST SPEECH RECOGNITION
 

Summary: MULTIPLE-MICROPHONE TIME-VARYING FILTERS FOR ROBUST SPEECH
RECOGNITION
Calvin Yiu-Kit Lai Parham Aarabi
The Artificial Perception Lab
The Edward S. Rogers Sr. Department of Electrical and Computer Engineering
University of Toronto
calvin.lai@utoronto.ca parham@ecf.utoronto.ca
ABSTRACT
A multiple microphone time varying filter that is an ex-
tension of the dual-microphone speech enhancement tech-
nique of [7] is proposed and experimentally 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 beamformingand superdirective beamforming. For
example, digit recognition results in an environment with
two speakers and a reverberation time of 0.1s show a recog-
nition accuracy rate increase of 25.2% over delay-and-sum
beamforming and an increase of 26.5% over superdirective

  

Source: Aarabi, Parham - Department of Electrical and Computer Engineering, University of Toronto

 

Collections: Computer Technologies and Information Sciences