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ICASSP
2011
IEEE

Spectral subtraction on real and imaginary modulation spectra

12 years 7 months ago
Spectral subtraction on real and imaginary modulation spectra
In this paper, we propose a novel phase preserving spectral subtraction method for enhancing speech in noise. Instead of the conventional approach of carrying out subtraction on the magnitude spectrum in the acoustic frequency domain, we propose to perform subtraction on the real and imaginary spectra separately in the modulation frequency domain. By doing so, we are able to enhance magnitude as well as phase through spectral subtraction. Our experimental results have demonstrated that the proposed method improved magnitude and phase estimation significantly at low SNR, and accordingly it significantly outperformed existing methods in speech enhancement evaluated on the criteria of segmental SNR and PESQ.
Yi Zhang, Yunxin Zhao
Added 20 Aug 2011
Updated 20 Aug 2011
Type Journal
Year 2011
Where ICASSP
Authors Yi Zhang, Yunxin Zhao
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