Time Synchronous Chart Parsing of Speech Integrating Unification Grammars with Statistics (1994)
| Venue: | Proceedings of Twente Workshop on Speech and Language Engineering |
| Citations: | 12 - 6 self |
BibTeX
@INPROCEEDINGS{Weber94timesynchronous,
author = {Hans Weber},
title = {Time Synchronous Chart Parsing of Speech Integrating Unification Grammars with Statistics},
booktitle = {Proceedings of Twente Workshop on Speech and Language Engineering},
year = {1994},
pages = {107--120}
}
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Abstract
We present an active chart parser which parses left connected wordgraphs in a strictly time synchronous way. The parser performs a beam search on the possible paths through the word graph and on the possible derivations of the unification grammar simultaneously. A metric is given to assign scores to edges, taking into account the whole left context thereby combining acoustic probabilities, n-gram probabilities and unification grammar probabilities. A specialized model for the derivation of typed unification grammars is introduced. Different ways of coupling the parser with an LR beam decoder in an online time synchronous fashion are defined and several experimental results are presented. Two top down and one bottom up method are investigated. In bottom up mode, the decoder sends word hypotheses as they are found from left to right, while the parser keeps step. In verify mode, the decoder is always a frame ahead, while the parser verifies received hypotheses, providing language informat...
