A broadband noise reduction method based on non-linear spectral subtraction is proposed. To prevent processing distortions in form of musical noise, over-subtraction is applied to the degraded signal spectrum. Furthermore, time-averaging is used to reduce the variance of the estimated signal-to-noise ratio (SNR). A masking threshold obtained by spectral smoothing leads to further reduction of audible processing distortions.

Authors: Hoeldrich, Robert; Lorber, Markus
Affiliation: Institute of Elcctronic Music Cyraz, Graz, Austria
AES Convention: 103 (September 1997) Paper Number: 4611
Publication Date: September 1, 1997
Subject: Sound Restoration and Archiving

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