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Improved training using semi-hidden Markov models in speech recognition

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2 Author(s)
Zhang, X. ; Fudan Univ., Shanghai, China ; Mason, J.S.

The idea of the semi-hidden Markov model (SHMM) is described, central to which is a modified training process. A modification to the conventional Baum-Welch algorithm is the kernel of the SHMM, where states are classified into types, reflecting fundamentally different speech signal characteristics. A preset supervisory function is introduced to the Baum-Welch algorithm and biases the training by reflecting the fitness of local signal characteristics to different state types. A simple example is described, using transient and quasi-stationary state types, which is found to be successful in E-set recognition

Published in:

Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on

Date of Conference:

23-26 May 1989