The 1998 HTK Broadcast News Transcription System: Development and Results (1999)
| Citations: | 3 - 0 self |
BibTeX
@MISC{Woodland99the1998,
author = {P. C. Woodland and T. Hain and G. L. Moore and T. R. Niesler and D. Povey and A. Tuerk and E. W. D. Whittaker},
title = {The 1998 HTK Broadcast News Transcription System: Development and Results},
year = {1999}
}
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Abstract
This paper presents the development of the HTK broadcast news transcription system for the November 1998 Hub4 evaluation. Relative to the previous year's system The system a number of features were added including vocal tract length normalisation; cluster-based variance normalisation; double the quantity of acoustic training data; interpolated word level language models to combine text sources; increased broadcast news language model training data; and an extra adaptation stage using a full-variance transform. Overall these changes to the system reduced the error rate by 13% on the 1997 evaluation data and the final system had an overall word error rate of 13.8% for the 1998 evaluation data sets.
