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Audio Denoising by Time-Frequency Block Thresholding

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3 Author(s)
Guoshen Yu ; Ecole Polytech., Palaiseau ; Mallat, S. ; Bacry, E.

Removing noise from audio signals requires a nondiagonal processing of time-frequency coefficients to avoid producing ldquomusical noise.rdquo State of the art algorithms perform a parameterized filtering of spectrogram coefficients with empirically fixed parameters. A block thresholding estimation procedure is introduced, which adjusts all parameters adaptively to signal property by minimizing a Stein estimation of the risk. Numerical experiments demonstrate the performance and robustness of this procedure through objective and subjective evaluations.

Published in:

Signal Processing, IEEE Transactions on  (Volume:56 ,  Issue: 5 )

Date of Publication:

May 2008

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