Ninth International Conference on Spoken Language Processing

Pittsburgh, PA, USA
September 17-21, 2006

Pronunciation Variant-Based Multi-Path HMMs for Syllables

Annika Hämäläinen, Louis ten Bosch, Lou Boves

Radboud Universiteit Nijmegen, The Netherlands

Recent research suggests that it is more appropriate to model pronunciation variation with syllable-length acoustic models than with context-dependent phones. Due to the large number of factors contributing to pronunciation variation at the syllable level, the creation of multi-path model topologies appears necessary. In this paper, we propose a novel approach for constructing multi-path models for frequent syllables. The suggested approach uses phonetic knowledge for the initialisation of the parallel paths, and a data-driven solution for their re-estimation. When applied to 94 frequent syllables in a 37-hour corpus of Dutch read speech, it leads to improved recognition performance when compared with a triphone recogniser of similar complexity.

Full Paper

Bibliographic reference.  Hämäläinen, Annika / Bosch, Louis ten / Boves, Lou (2006): "Pronunciation variant-based multi-path HMMs for syllables", In INTERSPEECH-2006, paper 1630-Wed1BuP.8.