Semi-supervised speaker adaptation
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United States of America Patent
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Sep 28, 2004
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N/A
app pub date -
Dec 15, 1999
filing date -
Dec 17, 1998
priority date (Note) -
Expired
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Abstract
To prevent adaptation to misrecognized words in unsupervised or on-line automatic speech recognition systems confidence measures are used or the user reaction is interpreted to decide whether a recognized phoneme, several phonemes, a word, several words or a whole utterance should be used for adaptation of the speaker independent model set to a speaker adapted model set or not and, in case an adaptation is executed, how strong the adaptation with this recognized utterance or part of this recognized utterance should be performed. Furtheron, a verification of the speaker adaptation performance is proposed to secure that the recognition rate never decreases (significantly), but only increases or stays at the same level.
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