4th International Conference on Spoken Language Processing
Philadelphia, PA, USA
We are improving a flexible, large vocabulary, speaker independent, isolated-word recognition system in a telephone environment, originally designed as an integrated system doing all the recognition process in one step. We have transformed it, by adopting the hypothesis-verification paradigm. In this paper, we will describe the architecture and results of the hypothesis subsystem. We will show the system evolution and the modifications adopted to face such a difficult task, achieving significant improvements using automatically clustered phoneme-like units, semi-continuous HMMs, and multiple models per unit. Also, system behavior for vocabulary dependent and independent tasks and vocabularies up to 10000 words will be tested.
Bibliographic reference. Macias-Guarasa, J. / Gallardo, A. / Ferreiros, J. / Pardo, José M. / Villarrubia, L. (1996): "Initial evaluation of a preselection module for a flexible large vocabulary speech recognition system in", In ICSLP-1996, 30-33.