Speech recognition method
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United States of America Patent
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-
May 9, 1989
Grant Date -
N/A
app pub date -
Mar 12, 1987
filing date -
Mar 25, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Speaker adaptation which enables a person to use a Hidden Markov model type recognizer previously trained by another person or persons. During initial training, parameters of Markov models are calculated iteratively by, for example, using the Forward-Backward algorithm. Adapting the recognizer to a new speaker involves (a) storing and utilizing intermediate results or probabilistic frequencies of a last iteration of training parameters, and (b) calculating new parameters by computing a weighted sum of the probabilistic frequencies stored during training and frequencies obtained from adaptation data derived from known utterances of words made by the new speaker.
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