Spectral attenuation algorithms for audio noise reduction often generate annoying musical noise artifacts. Most existing methods for suppression of musical noise employ a combination of instantaneous and time-smoothed spectral estimates for calculation of spectral gains. In this paper, a 2D approach to the filtering of a time-frequency spectrum is proposed, based on a recently developed Non-Local Means image denoising algorithm. The proposed algorithm demonstrates efficient reduction of musical noise, without creating “noise echoes” artifacts inherent in time-smoothing methods.

Authors: Lukin, Alexey; Todd, Jeremy
Affiliations: Moscow State University; iZotope, Inc.(See document for exact affiliation information.)
AES Convention: 123 (October 2007) Paper Number: 7168
Publication Date: October 1, 2007
Subject: Signal Processing

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