A Priori SNR Estimation Using Weibull Mixture Model

A. Chinaev, J. Heitkaemper, R. Haeb-Umbach, in: 12. ITG Fachtagung Sprachkommunikation (ITG 2016), 2016.

Conference Paper | English
Abstract
This contribution introduces a novel causal a priori signal-to-noise ratio (SNR) estimator for single-channel speech enhancement. To exploit the advantages of the generalized spectral subtraction, a normalized ?-order magnitude (NAOM) domain is introduced where an a priori SNR estimation is carried out. In this domain, the NAOM coefficients of noise and clean speech signals are modeled by a Weibull distribution and aWeibullmixturemodel (WMM), respectively. While the parameters of the noise model are calculated from the noise power spectral density estimates, the speechWMM parameters are estimated from the noisy signal by applying a causal Expectation-Maximization algorithm. Further a maximum a posteriori estimate of the a priori SNR is developed. The experiments in different noisy environments show the superiority of the proposed estimator compared to the well-known decision-directed approach in terms of estimation error, estimator variance and speech quality of the enhanced signals when used for speech enhancement.
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12. ITG Fachtagung Sprachkommunikation (ITG 2016)
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Chinaev A, Heitkaemper J, Haeb-Umbach R. A Priori SNR Estimation Using Weibull Mixture Model. In: 12. ITG Fachtagung Sprachkommunikation (ITG 2016). ; 2016.
Chinaev, A., Heitkaemper, J., & Haeb-Umbach, R. (2016). A Priori SNR Estimation Using Weibull Mixture Model. In 12. ITG Fachtagung Sprachkommunikation (ITG 2016).
@inproceedings{Chinaev_Heitkaemper_Haeb-Umbach_2016, title={A Priori SNR Estimation Using Weibull Mixture Model}, booktitle={12. ITG Fachtagung Sprachkommunikation (ITG 2016)}, author={Chinaev, Aleksej and Heitkaemper, Jens and Haeb-Umbach, Reinhold}, year={2016} }
Chinaev, Aleksej, Jens Heitkaemper, and Reinhold Haeb-Umbach. “A Priori SNR Estimation Using Weibull Mixture Model.” In 12. ITG Fachtagung Sprachkommunikation (ITG 2016), 2016.
A. Chinaev, J. Heitkaemper, and R. Haeb-Umbach, “A Priori SNR Estimation Using Weibull Mixture Model,” in 12. ITG Fachtagung Sprachkommunikation (ITG 2016), 2016.
Chinaev, Aleksej, et al. “A Priori SNR Estimation Using Weibull Mixture Model.” 12. ITG Fachtagung Sprachkommunikation (ITG 2016), 2016.

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