Speech recognition method and system
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United States of America Patent
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-
Jan 15, 2008
Grant Date -
Nov 7, 2002
app pub date -
Dec 19, 2001
filing date -
Dec 19, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A speech recognition system uses a phoneme counter to determine the length of a word to be recognized. The result is used to split a lexicon into one or more sub-lexicons containing only words which have the same or similar length to that of the word to be recognized, so restricting the search space significantly. In another aspect, a phoneme counter is used to estimate the number of phonemes in a word so that a transition bias can be calculated. This bias is applied to the transition probabilities between phoneme models in an HNN based recognizer to improve recognition performance for relatively short or long words.
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