Speech recognition apparatus
First Claim
1. A speech recognition apparatus which recognizes input speech input to said apparatus, the input speech including plural recognizable units which have a shorter duration than the input speech, said apparatus obtaining a recognition unit corresponding to each recognizable unit and outputting final recognition results by successively connecting each obtained recognition unit, said apparatus comprising:
- speech period sensing means for detecting a speech period by sensing a beginning and an end of the input speech;
duration training means for calculating a relationship between durations of recognition units by using influencing factors which influence the duration of the recognition units;
duration estimation means for estimating a duration of each of the recognizable units within the input speech by using the speech period of the input speech detected by the sensing means and a duration relationship calculated by the training means; and
matching means for matching a recognition unit to a recognizable unit to produce a final recognition result based upon durations estimated by the estimation means.
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Abstract
At the time of training reference speech, the relationship between durations of each recognition unit is obtained by a duration training circuit and, at the time of recognizing speech, a beginning and an end of input speech is detected by a speech period sensing circuit, and then by using the relationship and the input speech period length, the durations of the recognition units in the input speech are estimated. Next, the reference speech and the input speech are matched by the matching means by using the calculated estimation values in such a manner that the recognition units have a duration close to that of the estimated values.
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Citations
8 Claims
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1. A speech recognition apparatus which recognizes input speech input to said apparatus, the input speech including plural recognizable units which have a shorter duration than the input speech, said apparatus obtaining a recognition unit corresponding to each recognizable unit and outputting final recognition results by successively connecting each obtained recognition unit, said apparatus comprising:
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speech period sensing means for detecting a speech period by sensing a beginning and an end of the input speech; duration training means for calculating a relationship between durations of recognition units by using influencing factors which influence the duration of the recognition units; duration estimation means for estimating a duration of each of the recognizable units within the input speech by using the speech period of the input speech detected by the sensing means and a duration relationship calculated by the training means; and matching means for matching a recognition unit to a recognizable unit to produce a final recognition result based upon durations estimated by the estimation means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification