Speech recognition apparatus capable of improving recognition rate regardless of average duration of phonemes
First Claim
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1. A speech recognition apparatus, comprising:
- a feature extracting portion extracting a feature parameter by sliding, at least with different time width, a plurality of frames corresponding to time windows each having a prescribed length of time, over an input speech signal;
a storing portion storing standard pattern data in correspondence with phoneme patterns, respectively, of said input speech; and
a recognizing portion collating said feature parameter extracted by said feature extracting pattern with said standard pattern data to recognize a corresponding phoneme and to output a recognition result.
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Abstract
In a speech recognition apparatus, a feature extracting portion extracts feature parameters by sliding a plurality of frames corresponding to time windows each having a prescribed length of time with a successively increasing time width, over an input speech signal. A word lexicon database stores standard pattern data in correspondence with phoneme patterns of the input speech. A recognition processing portion collates the feature parameter extracted by the feature extracting portion with the standard pattern data to recognize a corresponding phoneme, and outputs a recognition result.
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Citations
9 Claims
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1. A speech recognition apparatus, comprising:
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a feature extracting portion extracting a feature parameter by sliding, at least with different time width, a plurality of frames corresponding to time windows each having a prescribed length of time, over an input speech signal;
a storing portion storing standard pattern data in correspondence with phoneme patterns, respectively, of said input speech; and
a recognizing portion collating said feature parameter extracted by said feature extracting pattern with said standard pattern data to recognize a corresponding phoneme and to output a recognition result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification