SPEECH SYNTHESIS DEVICE, SPEECH SYNTHESIS METHOD, AND SPEECH SYNTHESIS PROGRAM
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Abstract
It is possible to provide a speech synthesis device, speech synthesis method, and speech synthesis program which can improve a speech quality and reduce a calculation amount with a preferable balance between them. The speech synthesis device includes: a sub-score calculation unit (60/65) which calculates a segment selection sub-score for selecting an optimal segment; and a candidate narrowing unit (70/73) for narrowing the candidates according to the number of the candidate segments and the segment selection sub score. The speech synthesis device performs candidate narrowing by the sub score calculation unit (60/65) and the candidate narrowing unit (70/73) in the candidate selection process when generating a synthesized speech from an input text.
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Citations
39 Claims
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1-21. -21. (canceled)
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22. A speech synthesis device comprising:
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a sub-score calculation unit that calculates a segment selection sub-score for selecting an optimal segment; a threshold value calculation unit that derives a threshold value according to the number of said candidate segments; and a candidate narrowing unit that narrows down candidates according to said threshold value and said segment selection sub-score. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A speech synthesis method, in a speech synthesis device that generates synthesized speech from an input text, comprising:
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calculating a segment selection sub-score for selecting an optimal segment; and narrowing down candidates according to a threshold value, derived according to the number of said candidate segments, and said segment selection sub-score in a process of selecting an optimal segment. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A program having a computer, constituting a speech synthesis device that generates synthesized speech from an input text, execute:
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in a process of selecting an optimal segment for generating synthesized speech from an input text, processing of calculating a segment selection sub-score for selecting an optimal segment; processing of deriving a threshold value according to the number of said candidate segments; and candidate narrowing processing of narrowing down candidates according to said threshold value and an said segment selection sub-score. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification