A tentative algorithm for estimating the glottal waveform with glottal closure information
Eiichi Yoshikawa, Nobuhiro Miki, Yoshihiko Ogawa · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 1999
It is known that the glottal waveform includes acoustic information on the individuality of speakers, and that the inverse filtering method is useful in extracting glottal waveform from speech signals. In conventional methods, stationary analysis is performed for the duration of a few pitches. Short-time analysis with the drawback of unstable estimation, is performed for one pitch duration. We propose a new method of inverse filtering by using the estimation algorithm for the vocal tract transfer function; the analysis is performed stably for each pitch using the mapping algorithm with the Fejér kernel. The experimental results show reasonable estimation of glottal waveforms. In addition, we investigate the effect of the estimation order and the method of solving the Yule-Walker equation. The experiments are performed for (1) different speakers, and different vowels in different order, and (2) different algorithms such as the TLS and Levinson algorithm. © 1998 Scripta Technica, Electron Comm Jpn Pt 3, 82(2): 28–36, 1999