Method of denoising a noisy signal including speech and noise components
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United States of America Patent
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May 31, 2011
Grant Date -
Nov 29, 2007
app pub date -
Feb 26, 2007
filing date -
Mar 1, 2006
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Abstract
A method of analyzing time coherence in the noisy signal including the steps of: a) determining a reference signal from the noisy signal by applying treatment (10, 18) to the noisy signal that is suitable for attenuating speech components more strongly than the noise component, in particular by an adaptive recursive predictive algorithm of the LMS type; b) determining (24) a probability of speech being present/absent on the basis of the respective energy levels in the spectral domain of the noisy signal and of the reference signal; and c) deriving (26) a denoised estimate of the speech signal from the noise signal as a function of the probability of the speech being present/absent as determined in this way.
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