Search algorithm for large vocabulary speech recognition
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United States of America Patent
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Aug 14, 2001
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N/A
app pub date -
Jan 7, 1999
filing date -
Jan 7, 1999
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Abstract
Automatic speech recognition word sequence hypotheses are generated using an interleaved forward-backward search. A forward search pass uses relatively simple models for a given block period of time. A backward search pass then goes back over the previous block period using more complex models and the recognition hypotheses generated by the forward search pass. The backward search pass employs a word dependent n-best search having a flat model state organization.
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