Accent information extracting device, accent information extracting method, and accent information extracting program

摘要

PPROBLEM TO BE SOLVED: To provide an accent information-extracting device which accurately determines an accent type of input voice. PSOLUTION: An F0 variation pattern which is a variation pattern of a basic frequency from input voice is extracted; and mora synchronization information which is time information synchronized with each mora of the input voice is input. Next, a mora representative value is calculated for each mora of the F0 variation pattern, and a mora variation amount which is a variation amount of a mora representative value adjoining thereafter, with reference to the mora representative value, is respectively calculated. Then, a mora in which the mora variation value is the smallest negative value is detected, and when a variation amount minimum value which is a mora variation amount by that mora is larger than a first threshold for determining an accent 0 type, it is determined to be the 0 type, and when it is smaller than the first threshold, a mora variation amount of a mora before the mora with the variation amount minimum value is continuously searched, and the accent type is determined by detecting a foremost mora which is smaller than a second threshold for determining that the mora variation amount is other than the accent 0 type. PCOPYRIGHT: (C)2011,JPO&INPIT