Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models

X.L. Aubert, R. Haeb-Umbach, H. Ney, in: ICASSP, Minneapolis, 1993.

Conference Paper | English
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Abstract
Linear discriminant analysis (LDA) experiments reported previously (ICASSP-92 vol.1, p.13-16), are extended to context-dependent models and speaker-independent large vocabulary continuous speech recognition. Two variants of using mixture densities are compared: state-specific modeling and the monophone-tying approach where densities are shared across the states relevant to the same phoneme. Results are presented on the DARPA Resource Management (RM) task for both speaker-dependent (SD) and speaker-independent (SI) parts. Using triphone models based on LDA and continuous mixture densities, significant improvements have been observed and the following word error rates have been achieved: for the SD part, 7.8% without grammar and 1.5% with word pair; and for the SI part, 17.2% and 4.6%, respectively. These scores are averaged over 1200 SD or SI evaluation sentences and are among the best published so far on the RM database.
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ICASSP, Minneapolis
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Aubert XL, Haeb-Umbach R, Ney H. Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models. In: ICASSP, Minneapolis. ; 1993.
Aubert, X. L., Haeb-Umbach, R., & Ney, H. (1993). Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models. In ICASSP, Minneapolis.
@inproceedings{Aubert_Haeb-Umbach_Ney_1993, title={Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models}, booktitle={ICASSP, Minneapolis}, author={Aubert, Xavier L. and Haeb-Umbach, Reinhold and Ney, Hermann}, year={1993} }
Aubert, Xavier L., Reinhold Haeb-Umbach, and Hermann Ney. “Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models.” In ICASSP, Minneapolis, 1993.
X. L. Aubert, R. Haeb-Umbach, and H. Ney, “Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models,” in ICASSP, Minneapolis, 1993.
Aubert, Xavier L., et al. “Continuous Mixture Densities and Linear Discriminant Analysis for Improved Context-Dependent Acoustic Models.” ICASSP, Minneapolis, 1993.

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