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 spect...

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Bibliographic Details
Published in2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) pp. 4744 - 4747
Main Authors Yi Zhang, Yunxin Zhao
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2011
Subjects
Acoustics
Frequency domain analysis
Modulation Frequency
Noise measurement
Noise Reduction
Signal to noise ratio
Spectral Subtraction
Speech
Speech enhancement
Speech Phase
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Summary: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.
ISBN:9781457705380
1457705389
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2011.5947415