• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1995 Fiscal Year Final Research Report Summary

Study on Natural Voice Synthesis based on Analysis of the Articulation Organ.

Research Project

Project/Area Number 05452222
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionOsaka University

Principal Investigator

MORITA Tatsuya  Osaka Univ.Faculty of Eng.Assosiate Prof., 工学部, 助教授 (60029204)

Co-Investigator(Kenkyū-buntansha) MATSUMURA Fumimasa  Osaka Electro-communication Univ.Faculty of Eng.Assosiate Prof., 工学部, 助教授 (80209618)
Project Period (FY) 1993 – 1995
KeywordsAnalysis of Articulation Organ. / Natural Voice Synthesis. / Measurement of Throat Impedance. / Pitch Estimation. / Magnetic Resonance Imaging. / 3D Measurement of Vocal Tract and Nasal Cavity. / Dental Crown Plate. / 歯冠プレート
Research Abstract

Natural voice synthesis is an important project for developing the voice processing system and the articulation prosthesis system. The vocal cords and the vocal tract are two elementary organ in the voice articulation system. Naturality of language such as accent and intonation depend on the pitch control in the vocal cords. Significance of the vocal tract control in articulation is self-evident. We have analyzed articulation system by several methods such as measurement of articulation movement. PARCOR analysis, measurement of throat impedance and vocal tract imaging using magnetic resonance(MRI). In this project, later two methods are discussed.
(1)A throat impedance-meter was developed for measuring resistance and capacitance components separately. Stational characteristics between vocal pitch and impedance could be approximated by a third order polynomial function. Dynamic characteristics between vocal pitch and impedance was analyzedby FFT to estimate pitch from impedance change. S … More ynthesized vowels using estimated pitch accorded with original vowels in hearing test. In the case of sequential vowels, vocal pitch could be estimated by compensating impedance component arising from change of the vocal sound. For most part of the subjects whose resistance change did not accompanied with vocal pitch, capacity change was effective for pitch estimation. It was supposed that this variance should depend on parsonality in the articulation.
(2)Three dimensional shapes of vocal tract and nasal cavity were measured using MRI.Especially, image of dental crowns containing low hydrate content was obtained by covering them with thin dental crown plate. Using this method, distance between molars could be measured in accuracy below 0.4 mm. Arbitrary sections of the vocal tract and nasal cavity could be extracted by applying cubic convolution method to 3D images during articulating Japanese vowels and fricatives(/s/, /sh/, /shu/). It was revealed that there existed parsonal differences in the situation of the dental crowns and volume of the paranasal cavities during articulation. Less

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] 松村雅史: "MRIによる歯冠部を含む声道と鼻腔の三次元形状の計測" 電気学会論文誌C. 114-C. 1067-1072 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masafumi Matsumura: "Measurement of 3D shapes of vocal tract, dental crown and nasal cavity using MRI" Trans.Inst.Electrical Engineers Japan. Vol.114-C. 1067-1072 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1997-03-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi