Automatic speech recognition channel normalization based on measured statistics from initial portions of speech utterances
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United States of America Patent
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Sep 14, 2010
Grant Date -
Aug 18, 2005
app pub date -
Jan 10, 2005
filing date -
Jan 12, 2004
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Abstract
Channel normalization for automatic speech recognition is provided. Statistics are measured from an initial portion of a speech utterance. Feature normalization parameters are estimated based on the measured statistics and a statistically derived mapping relating measured statistics and feature normalization parameters. In some examples, the measured statistics comprise measures of an energy from the initial portion of the speech utterance. In some examples, measures of the energy comprise extreme values of the energy.
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