CUED Publications database

Applications of stochastic context-free grammars using the Inside-Outside algorithm

Lari, K and Young, SJ (1991) Applications of stochastic context-free grammars using the Inside-Outside algorithm. Computer Speech and Language, 5. pp. 237-257. ISSN 0885-2308

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Abstract

This paper describes two applications in speech recognition of the use of stochastic context-free grammars (SCFGs) trained automatically via the Inside-Outside Algorithm. First, SCFGs are used to model VQ encoded speech for isolated word recognition and are compared directly to HMMs used for the same task. It is shown that SCFGs can model this low-level VQ data accurately and that a regular grammar based pre-training algorithm is effective both for reducing training time and obtaining robust solutions. Second, an SCFG is inferred from a transcription of the speech used to train a phoneme-based recognizer in an attempt to model phonotactic constraints. When used as a language model, this SCFG gives improved performance over a comparable regular grammar or bigram. © 1991.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div F > Machine Intelligence
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:22
Last Modified: 22 Dec 2014 01:15
DOI: 10.1016/0885-2308(91)90009-F