Speech recognition system distinguishing dictation from commands by arbitration between continuous speech and isolated word modules
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United States of America Patent
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Aug 11, 1998
Issued Date -
N/A
app pub date -
Jun 24, 1996
filing date -
Jun 30, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
In the speech recognition system disclosed herein, an input utterance is submitted to both a large vocabulary isolated word speech recognition module and a small vocabulary continuous speech recognition module. The small vocabulary contains command words which can be combined in sequences to define commands to an application program. The two recognition modules generate respective scores for identified large vocabulary models and for sequences of small vocabulary models. The score provided by the continuous speech recognizer is normalized on the basis of the length of the speech input utterance and an arbitration algorithm selects among the candidates identified by the recognition modules. Without requiring the user to switch modes, text is output if a score from the isolated word recognizer is selected and a command is output if a score from the continuous speech recognizer is selected.
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