RFC모델의 한국어 억양 곡선에의 적용

Application of Rise/Fall/connection(RFC) Model to Korean Intonation

This is a pilot study on applying the Rise/Fall/connection(RFC) model to Korean intonation tot speech synthesis. RFC model contains successive intonation events, which can be pitch accents and intonation boundary tones. The intonation contour of RFC model is composed of piecewise linear curves of rise, fall, and connection elements, and each element can have any amplitude and duration. In this paper, elements of RFC model is slightly modified to accommodate the characteristics of Korean intonation. Subjective preference test was conducted to compare the modified RFC model with the original one. The results show that the intonation contour produced by the modified RFC model is perceptually indistinguishable from that of the original RFC model, while the former requires less number of labels than the latter.