Method for utilizing formant frequencies in speech recognition
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United States of America Patent
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Sep 8, 1992
Issued Date -
N/A
app pub date -
Nov 8, 1988
filing date -
Nov 30, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A speech recognizer which utilizes hypothesis testing to determine formant frequencies for use in speech recognition. A pre-processor (36) receives speech signal frames and utilizes linear predictive coding to generate all formant frequency candidates. An optimum formant selector (38) operates with a comparator (40) to select from the formant candidates those formants which best match stored reference formants. A dynamic time warper (42) and high level recognition logic (44) operate to determine whether or not to declare a recognized word.
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