Recognition confidence measuring by lexical distance between candidates
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United States of America Patent
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Mar 24, 2015
Grant Date -
Aug 9, 2007
app pub date -
Jul 31, 2006
filing date -
Feb 9, 2006
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Abstract
A recognition confidence measurement method, medium and system which can more accurately determine whether an input speech signal is an in-vocabulary, by extracting an optimum number of candidates that match a phone string extracted from the input speech signal and estimating a lexical distance between the extracted candidates is provided. A recognition confidence measurement method includes: extracting a phoneme string from a feature vector of an input speech signal; extracting candidates by matching the extracted phoneme string and phoneme strings of vocabularies registered in a predetermined dictionary and; estimating a lexical distance between the extracted candidates; and determining whether the input speech signal is an in-vocabulary, based on the lexical distance.
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