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Efficient Musical Noise Suppression for Speech Enhancement Systems

Authors:
Thomas Esch and Peter Vary
Book Title:
Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
Venue:
Taipei, Taiwan
Organization:
IEEE
Date:
Apr. 2009
Pages:
4409–4412
ISBN:
978-1-42442-354-5
Language:
English

Abstract

Noise reduction techniques that are relying on spectral weighting rules often generate annoying musical noise artifacts in the processed signal. In this paper, we present a postfilter (PF) for the spectral weighting gains that is capable of reducing musical noise in a simple but efficient way. It includes a robust detector for speech pauses and low SNR conditions and adaptively smoothes the weighting gains over frequency based on soft-decisions. Objective and subjective measurements show consistent improvements if the postfilter is applied to conventional noise reduction techniques.

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