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OU Shifeng, SONG Peng, GAO Ying. Laplacian Speech Model and Soft Decision Based MMSE Estimator for Noise Power Spectral Density in Speech Enhancement[J]. Chinese Journal of Electronics, 2018, 27(6): 1214-1220. DOI: 10.1049/cje.2018.09.009
Citation: OU Shifeng, SONG Peng, GAO Ying. Laplacian Speech Model and Soft Decision Based MMSE Estimator for Noise Power Spectral Density in Speech Enhancement[J]. Chinese Journal of Electronics, 2018, 27(6): 1214-1220. DOI: 10.1049/cje.2018.09.009
shu

Laplacian Speech Model and Soft Decision Based MMSE Estimator for Noise Power Spectral Density in Speech Enhancement

  • 1.

    School of Science and Technology for Opto-electronic Information, Yantai University, Yantai 264005, China;

  • 2.

    School of Computer and Control Engineering, Yantai University, Yantai 264005, China

Funds: This work is supported by the National Natural Science Foundation of China (No.61703360, No.61005021, No.61201457) and the Natural Science Foundation of Shandong Province (No.ZR2017MF008, No.ZR2017MF019).
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  • Corresponding author:

    GAO Ying (corresponding author) was born in Liaoning Province, China, in 1978. She received the Ph.D. degree in geodetection and information technology from Jilin University, China in 2008. Currently, she is an associate professor at Yantai University, China. Her research interest is signal and information processing. (Email:claragaoying@126.com)

  • Received Date: January 12, 2016
  • Revised Date: June 08, 2016
  • Published Date: November 09, 2018
    Graphical Abstract
    • Abstract
  • The estimation of noise Power spectral density (PSD) is a very crucial issue for speech enhancement as a result of its significant effect on the quality and intelligibility of the enhanced speech. Most of the existing estimators for noise PSD try to employ Gaussian speech priors, which, however, have been proven inconsistent with the reality. We derived an effective solution to this problem of estimating noise PSD in the Minimum mean square error (MMSE) sense when the speech component is modeled by a Laplacian distribution. Meanwhile, the soft decision technique instead of the hard Voice activity detection (VAD) is evolved into our algorithm, which can automatically makes the estimation unbiased without requiring a bias compensation. The performance of the proposed method is tested by several objective and subjective measures under various stationary and nonstationary noise environments. The results confirm that our method achieves good performance for all the noise conditions and Signalnoise-ratio (SNR) settings.
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    • References (22)
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