Several types of Semi-Continuous HMM (SC-HMM) have been compared with the Continuous Density HMM (CD-HMM) in the context of Speaker Independent Isolated Words Recognition (SI-IWR). It is demonstrated that for the ten-digit vocabulary (TIDIGITS), the SC-HMM outperforms the CD-HMM when memory constraints are imposed on the system. SC-HMMs demonstrate recognition rate of about 95% with a total of 59 Gaussians, while under similar conditions the CD-HMM yield recognition rates of well below 80%. An algorithm for optimal selection of Gaussian functions for SC-HMM is presented.
Cite as: Vaich, T., Cohen, A. (1999) Comparison of continuous-density and semi-continuous HMM in isolated words recognition systems. Proc. 6th European Conference on Speech Communication and Technology (Eurospeech 1999), 1515-1518, doi: 10.21437/Eurospeech.1999-264
@inproceedings{vaich99_eurospeech,
author={T. Vaich and A. Cohen},
title={{Comparison of continuous-density and semi-continuous HMM in isolated words recognition systems}},
year=1999,
booktitle={Proc. 6th European Conference on Speech Communication and Technology (Eurospeech 1999)},
pages={1515--1518},
doi={10.21437/Eurospeech.1999-264}
}