This paper describes a set of experiments using a speaker-independent, isolated-word recognition system over the telephone network. We are concerned with the sensitivity of recognition accuracy to a set of external factors. Specifically, we want to know how much performance degradation can be expected when no vocabulary-specific data are available for training. We also want to determine the relative importance of several factors in choosing a vocabulary-independent training set including: data collection paradigm, speaking mode, and recording environment. Our results indicate that recognition accuracy decreases appreciably in the absence of vocabulary-specific training data. If vocabulary-specific training data are not available, reasonable initial recognition performance can be achieved by using a phonetically balanced corpus for training, preferably consisting of isolated words recorded over the telephone network.
Cite as: Hetherington, I.L., Leung, H.C., Zue, V.W. (1991) Toward vocabulary-independent recognition of telephone speech. Proc. 2nd European Conference on Speech Communication and Technology (Eurospeech 1991), 475-478, doi: 10.21437/Eurospeech.1991-119
@inproceedings{hetherington91_eurospeech,
author={I. Lee Hetherington and Hong C. Leung and Victor W. Zue},
title={{Toward vocabulary-independent recognition of telephone speech}},
year=1991,
booktitle={Proc. 2nd European Conference on Speech Communication and Technology (Eurospeech 1991)},
pages={475--478},
doi={10.21437/Eurospeech.1991-119}
}