发明名称 |
Speech coding apparatus with single-dimension acoustic prototypes for a speech recognizer |
摘要 |
In speech recognition and speech coding, the values of at least two features of an utterance are measured during a series of time intervals to produce a series of feature vector signals. A plurality of single-dimension prototype vector signals having only one parameter value are stored. At least two single-dimension prototype vector signals having parameter values representing first feature values, and at least two other single-dimension prototype vector signals have parameter values representing second feature values. A plurality of compound-dimension prototype vector signals have unique identification values and comprise one first-dimension and one second-dimension prototype vector signal. At least two compound-dimension prototype vector signals comprise the same first-dimension prototype vector signal. The feature values of each feature vector signal are compared to the parameter values of the compound-dimension prototype vector signals to obtain prototype match scores. The identification values of the compound-dimension prototype vector signals having the best prototype match scores for the feature vectors signals are output as a sequence of coded representations of an utterance to be recognized. A match score, comprising an estimate of the closeness of a match between a speech unit and the sequence of coded representations of the utterance, is generated for each of a plurality of speech units. At least one speech subunit, of one or more best candidate speech units having the best match scores, is displayed.
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申请公布号 |
US5280562(A) |
申请公布日期 |
1994.01.18 |
申请号 |
US19910770495 |
申请日期 |
1991.10.03 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BAHL, LALIT R.;BELLEGARDA, JEROME R.;EPSTEIN, EDWARD A.;LUCASSEN, JOHN M.;NAHAMOO, DAVID;PICHENY, MICHAEL A. |
分类号 |
G10L19/00;G10L15/02;G10L19/02;H03M7/30;(IPC1-7):G10L9/02 |
主分类号 |
G10L19/00 |
代理机构 |
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主权项 |
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地址 |
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