Reduction of non-stationary noise using a non-negative latent variable decomposition

Mikkel N. Schmidt, Jan Larsen

AbstractWe present amethod for suppression of non-stationary noise
in single channel recordings of speech. Themethod is based
on a non-negative latent variable decomposition model for
the speech and noise signals, learned directly from a noisy
mixture. In non-speech regions an overcomplete basis is
learned for the noise that is then used to jointly estimate
the speech and the noise from the mixture. We compare
the method to the classical spectral subtraction approach,
where the noise spectrum is estimated as the average over
non-speech frames. The proposed method significantly outperforms
the classic approach, especially when the noise is
highly non-stationary and at low signal-to-noise ratios.
Keywordsnon-negative latent variable decomposition, NMF, audio signal processing
TypeConference paper [With referee]
ConferenceIEEE Internatioanal Workshop on Machine Learning and Signal Processing XVIII
EditorsJose Principe, Deniz Erdogmus, Tulay Adali
Year2008    Month October
Electronic version(s)[pdf]
BibTeX data [bibtex]
IMM Group(s)Intelligent Signal Processing

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