Discriminative utterance verification for connected digits recognition
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Sep 15, 1995
filing date -
Sep 15, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a speech recognition system, a recognition processor receives an unknown utterance signal as input. The recognition processor in response to the unknown utterance signal input accesses a recognition database and scores the utterance signal against recognition models in the recognition database to classify the unknown utterance and to generate a hypothesis speech signal. A verification processor receives the hypothesis speech signal as input to be verified. The verification processor accesses a verification database to test the hypothesis speech signal against verification models reflecting a preselected type of training stored in the verification database. Based on the verification test, the verification processor generates a confidence measure signal. The confidence measure signal can be compared against a verification threshold to determine the accuracy of the recognition decision made by the recognition processor.
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