Paper: Head-Driven Parsing For Word Lattices

ACL ID P04-1030
Title Head-Driven Parsing For Word Lattices
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2004
Authors

We present the first application of the head-driven statistical parsing model of Collins (1999) as a si- multaneous language model and parser for large- vocabulary speech recognition. The model is adapted to an online left to right chart-parser for word lattices, integrating acoustic, n-gram, and parser probabilities. The parser uses structural and lexical dependencies not considered by n- gram models, conditioning recognition on more linguistically-grounded relationships. Experiments on the Wall Street Journal treebank and lattice cor- pora show word error rates competitive with the standard n-gram language model while extracting additional structural information useful for speech understanding.