|Department of Engineering|
|University of Cambridge > Engineering Department > Machine Intelligence Lab|
MMI TRAINING FOR CONTINUOUS PHONEME RECOGNITION ON THE TIMIT DATABASE
S. Kapadia, V. Valtchev and S.J. Young
This paper reports our experiences with a phoneme recognition system for the TIMIT database which uses multiple mixture continuous density monophone HMMs trained using MMI. A comprehensive set of results are presented comparing the ML and MMI training criteria for both diagonal and full covariance models. These results using simple monophone HMMs show clear performance gains achieved by MMI training, and are comparable to the best reported by others including those which use context-dependent models. In addition, the paper discusses a number of performance and implementation issues which are crucial to successful MMI training.
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