Speech recognition method and apparatus
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United States of America Patent
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Jul 21, 2009
Grant Date -
Dec 29, 2005
app pub date -
Jun 24, 2005
filing date -
Jun 29, 2004
priority date (Note) -
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Abstract
A speech recognition apparatus includes a word dictionary having recognition target words, a first acoustic model which expresses a reference pattern of a speech unit by one or more states, a second acoustic model which is lower in precision than said first acoustic model, selection means for selecting one of said first acoustic model and said second acoustic model on the basis of a parameter associated with a state of interest, and likelihood calculation means for calculating a likelihood of an acoustic feature parameter with respect to said acoustic model selected by said selection means.
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