| 摘要 |
PURPOSE:To eliminate the dispersion of a speech speed conversion effect on hearing caused by the differences in the length of each voiced sound segment. CONSTITUTION:Corresponding to the segment length, the voiced sound segment, which is shorter than a certain value, is expanded by a higher magnification so as to obtain a speach speed conversion effect in accordance with a desired magnification on hearing. For example, for a short voiced sound having a less than 150ms duration, an expansion magnification, which corresponds to the length of a voiced sound, is given along a magnification function g(w) as shown in the diagram. Moreover, when the method is to be applied to a reference magnification which changes a speech speed from a 'slow' to a 'fast' within the segment generated in one breath, the voiced sound segment, which has a duration of less than 150ms and appears within 450ms from a starting point in the segment, is given an expansion magnification corresponding to the length of a voiced sound along the function g(w) which is shown in graphic independent of its appearance time. If the voiced sound which exceeds 150ms or the duration time exceeds 450ms, a conventional expansion magnification f(t) is applied. |
