InforLorV4, Main, Exploration, bibRecordById, Hal:hal-00954654

Extension of uncertainty propagation to dynamic MFCCs for noise robust ASR

Identifieur interne : 000B84 ( Main/Exploration ); précédent : 000B83; suivant : 000B85

Extension of uncertainty propagation to dynamic MFCCs for noise robust ASR

Auteurs : Dung Tien Tran [France] ; Emmanuel Vincent [France] ; Denis Jouvet [France]

Source :

RBID : Hal:hal-00954654

Abstract

Uncertainty propagation has been successfully employed for speech recognition in nonstationary noise environments. The uncertainty about the features is typically represented as a diagonal covariance matrix for static features only. We present a framework for estimating the uncertainty over both static and dynamic features as a full covariance matrix. The estimated covariance matrix is then multiplied by scaling coefficients optimized on development data. We achieve 21\% relative error rate reduction on the 2nd CHiME Challenge with respect to conventional decoding without uncertainty, that is five times more than the reduction achieved with diagonal uncertainty covariance for static features only.

Url:

https://hal.inria.fr/hal-00954654

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Uncertainty propagation has been successfully employed for speech recognition in nonstationary noise environments. The uncertainty about the features is typically represented as a diagonal covariance matrix for static features only. We present a framework for estimating the uncertainty over both static and dynamic features as a full covariance matrix. The estimated covariance matrix is then multiplied by scaling coefficients optimized on development data. We achieve 21\% relative error rate reduction on the 2nd CHiME Challenge with respect to conventional decoding without uncertainty, that is five times more than the reduction achieved with diagonal uncertainty covariance for static features only.</div>
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Extension of uncertainty propagation to dynamic MFCCs for noise robust ASR

Extension of uncertainty propagation to dynamic MFCCs for noise robust ASR

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