Optimizing lexical fast search in a large vocabulary isolated
word speech recognition system
H. Drexler, R. Roddeman, L. Boves & H. Strik (1991)
Proceedings EUROSPEECH 91, Genova, Vol. 3, pp. 1401-1404.
This paper describes methods developed to improve the performance of a preselection
algorithm in a large vocabulary isolated word recogniser. First we investigate
ways for optimizing the phonetic representations of the words in the lexicon
(the base forms of which are obtained from a grapheme-to-phoneme converter)
in such a way that the inherent limitations of the front-end are taken into
account and were possible remedied. Then an attempt is made to improve the
quality of the symbol strings produced by the acoustic front-end.
Keywords: isolated-word recognition, preselection, lexicon