A novel approach to noise estimation in model-based speech feature enhancement

S. Windmann, R. Haeb-Umbach, 2008 ITG Conference on Voice Communication (SprachKommunikation) (2008) 1–4.

Journal Article | English
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Abstract
In this paper, the noise estimation for model-based speech feature enhancement in automatic speech recognition (ASR) is investigated. Beside a stationary noise prior, three linear state space models for the (cepstral) noise process are considered. We have derived novel EM algorithms for the estimation of the noise model parameters: A blockwise EM algorithm is applied on noise-only input data. It is supposed to be used during the offline training mode of the recognizer. Further a sequential online EM algorithm is employed to adapt the observation variance in recognition mode which works as well under the asumption of a stationary noise prior and a linear state model for the noise. Experiments on the AURORA4 database lead to improved recognition results with the new state model compared to the assumption of stationary noise.
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2008 ITG Conference on Voice Communication (SprachKommunikation)
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1-4
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Windmann S, Haeb-Umbach R. A novel approach to noise estimation in model-based speech feature enhancement. 2008 ITG Conference on Voice Communication (SprachKommunikation). 2008:1-4.
Windmann, S., & Haeb-Umbach, R. (2008). A novel approach to noise estimation in model-based speech feature enhancement. 2008 ITG Conference on Voice Communication (SprachKommunikation), 1–4.
@article{Windmann_Haeb-Umbach_2008, title={A novel approach to noise estimation in model-based speech feature enhancement}, journal={2008 ITG Conference on Voice Communication (SprachKommunikation)}, author={Windmann, Stefan and Haeb-Umbach, Reinhold}, year={2008}, pages={1–4} }
Windmann, Stefan, and Reinhold Haeb-Umbach. “A Novel Approach to Noise Estimation in Model-Based Speech Feature Enhancement.” 2008 ITG Conference on Voice Communication (SprachKommunikation), 2008, 1–4.
S. Windmann and R. Haeb-Umbach, “A novel approach to noise estimation in model-based speech feature enhancement,” 2008 ITG Conference on Voice Communication (SprachKommunikation), pp. 1–4, 2008.
Windmann, Stefan, and Reinhold Haeb-Umbach. “A Novel Approach to Noise Estimation in Model-Based Speech Feature Enhancement.” 2008 ITG Conference on Voice Communication (SprachKommunikation), 2008, pp. 1–4.

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