VOICE QUALITY CONVERSION DEVICE AND VOICE QUALITY CONVERSION METHOD

摘要

A voice quality conversion device converts voice quality of an input speech using information of the speech. The device includes: a target vowel vocal tract information hold unit (101) holding target vowel vocal tract information of each vowel indicating target voice quality; a vowel conversion unit (103) receiving vocal tract information with phoneme boundary information of the speech including information of phonemes and phoneme durations, (ii) approximating a temporal change of vocal tract information of a vowel in the vocal tract information with phoneme boundary information applying a first function, (iii) approximating a temporal change of vocal tract information of the same vowel held in the target vowel vocal tract information hold unit (101) applying a second function, (iv) calculating a third function by combining the first function with the second function, and (v) converting the vocal tract information of the vowel applying the third function; and a synthesis unit (103) synthesizing a speech using the converted information (102).