Single distribution and mixed distribution model conversion in speech recognition method, apparatus, and computer readable medium
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United States of America Patent
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Jul 24, 2001
Grant Date -
N/A
app pub date -
Mar 11, 1998
filing date -
Mar 13, 1997
priority date (Note) -
Expired
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Abstract
A process for removing additive noise due to the influence of ambient circumstances in a real-time manner in order to improve the precision of speech recognition which is performed in a real-time manner includes a converting process for converting a selected speech model distribution into a representative distribution, combining a noise model with the converted to generate speech model a noise superimposed speech model, performing a first likelihood calculation to recognize an input speech by using the noise superimposed speech model, converting the noise superimposed speech model to a noise adapted distribution that retains the relationship of the selected speech model, and performing a second likelihood calculation to recognize the input speech by using the noise adapted distribution.
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