Speech recognition system and method which permits a speaker's utterance to be recognized using a hidden markov model with subsequent calculation reduction
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United States of America Patent
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Jul 15, 1997
Issued Date -
N/A
app pub date -
Feb 14, 1994
filing date -
Mar 22, 1991
priority date (Note) -
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Abstract
A sound analyzer sound analyzes an input speech signal to obtain feature vectors. A matrix quantizer performs a matrix quantization process between the feature vectors obtained by the sound analyzer and a phonetic segment dictionary prepared in phonetic segment units to obtain a phonetic segment similarity sequence. A PS-phoneme integrating section integrates the phonetic segment similarity sequence into a phonemic feature vector. A HMM recognizer checks the phonemic feature vector using a HMM prepared in certain units, to thereby perform a recognition process.
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