Kepstrum approach to real-time speech-enhancement methods using two microphones
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Date
2005
DOI
Open Access Location
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Publisher
Massey University
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Abstract
The objective of this paper is to provide improved real-time noise canceling performance by using
kepstrum analysis. The method is applied to typically existing two-microphone approaches using
modified adaptive noise canceling and speech beamforming methods. It will be shown that the kepstrum
approach gives an improved effect for optimally enhancing a speech signal in the primary input when it
is applied to the front-end of a beamformer or speech directivity system. As a result, enhanced
performance in the form of an improved noise reduction ratio with highly reduced adaptive filter size can
be achieved. Experiments according to 20cm broadside microphone configuration are implemented in
real-time in a real environment, which is a typical indoor office with a moderate reverberation condition.
Description
Keywords
Noise cancellation, Beamforming, Speech signals
Citation
Jeong, J., Moir, T.J. (2005), Kepstrum approach to real-time speech-enhancement methods using two microphones, Research Letters in the Information and Mathematical Sciences, 7, 135-145