Singing support system using LPC residual wave for laryngectomee
Takashi Himeno, Yuto Tanaka, Mitsunori Mizumachi, Kenji Matsui · 2016
In this paper, we propose a singing system to transmit the pseudo-vocal sound source to the vocal tract. The purpose is the quality improvement of singing voice when using an Electric-Larynx (EL), which is an alternative vocal apparatus of laryngectomee. Thus, we focus on the LPC residual wave, but it has a problem that the signal-power of the vowels /i/ and /u/ are largely reduced. Therefore we tried to improve the quality of sound by adding a signal-power compensation. We carried out listening experiments for the four sound sources "LPC residual wave", "LPC residual wave (signal-power Compensation)", "Rosenberg wave" and "EL". As a result, power-compensated LPC residual wave had the highest naturalness. However, the spectrum of the vowels /i/ differed greatly from the singing voice of the normal utterance.