Abstract
A speech recognition method and apparatus is disclosed in which outputs a confidence score indicative of the posterior probability of an utterance being correctly matched to a word model. The confidence score for the matching of an utterance to a word model is determined directly from the generated values indicative of the goodness of match between the utterance and stored word models utilizing the following equation: confidence = exp ( - 2 σ S ( x | w ) ) ∑ words exp ( 2 σ S ( x | w ) ) where S(x|w) is the match score for the correlation between a signal x and word w and σ is an experimentally determined constant.
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