紀要論文

アクセント成分を用いた講演の強調検出

jpn

24321192

https://doi.org/10.15002/00014405

法政大学大学院情報科学研究科

12

1

6

2017-03-31

Version of Record

We propose a method for detecting a prominence in Japanese presentations. The prominence is not clearly defined enough to detect the prominence quantitatively in Japanese, because it is covered only in phonetics and Japanese language education qualitatively. In order to quantify the prominence and propose features for detecting the prominence, we reviewed the literature and we understood how words are emphasized in Japanese sentences. In addition, we analyzed acoustic features (e.g., F0, energy, accent component, pause and speech rate) in a data of utterances including an emphasized word based on the knowledge. As a result, we propose using the accent component and ∆ accent as a feature for detecting prominence. In an evaluation experiment to detect prominence, we used the intensity of the accent component and its delta features. The experimental results show that a detection accuracy of 0.82 was obtained, which is higher than that achieved in an experiment using features proposed in a method for prominence detection in stress accent language. In an evaluation experiment to detect prominence using every features, ∆ accent was most effective. This result dovetailed with a knowledge that Japanese accent is pitch and a word is emphasized by suppressing pitch accent of words before/after the prominence. Therefore, it was suggested that the proposed method is a one of efficient methods for detecting the prominence.

Article

AA12746425