Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition

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

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Abstract
This paper addresses the robustness of automatic speech recognition to environmental noise. In order to account for reliability of the clean feature estimate we employ the feature posterior density conditioned on observed noisy features to perform uncertainty decoding. We investigate two approaches to estimate the posterior using a discrete feature space, first conditioning only on the current observation, and second on the whole feature sequence of an utterance. Experiments with Aurora 2 showed that the latter provides slightly better performance, as it allows for exploiting the temporal correlations between consecutive features.
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2008 ITG Conference on Voice Communication (SprachKommunikation)
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1-4
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Ion V, Haeb-Umbach R. Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition. 2008 ITG Conference on Voice Communication (SprachKommunikation). 2008:1-4.
Ion, V., & Haeb-Umbach, R. (2008). Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition. 2008 ITG Conference on Voice Communication (SprachKommunikation), 1–4.
@article{Ion_Haeb-Umbach_2008, title={Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition}, journal={2008 ITG Conference on Voice Communication (SprachKommunikation)}, author={Ion, Valentin and Haeb-Umbach, Reinhold}, year={2008}, pages={1–4} }
Ion, Valentin, and Reinhold Haeb-Umbach. “Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition.” 2008 ITG Conference on Voice Communication (SprachKommunikation), 2008, 1–4.
V. Ion and R. Haeb-Umbach, “Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition,” 2008 ITG Conference on Voice Communication (SprachKommunikation), pp. 1–4, 2008.
Ion, Valentin, and Reinhold Haeb-Umbach. “Investigations into Uncertainty Decoding Employing a Discrete Feature Space for Noise Robust Automatic Speech Recognition.” 2008 ITG Conference on Voice Communication (SprachKommunikation), 2008, pp. 1–4.

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