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Titolo:
Dynamic articulatory model based on multidimensional invariant-feature task representation
Autore:
Kaburagi, T; Honda, M;
Indirizzi:
Kyushu Inst Design, Dept Acoust Design, Minami Ku, Fukuoka 8158540, Japan Kyushu Inst Design Fukuoka Japan 8158540 nami Ku, Fukuoka 8158540, Japan NTT, Commun Sci Lab, Human & Informat Sci Lab, Atsugi, Kanagawa 2430198, Japan NTT Atsugi Kanagawa Japan 2430198 ci Lab, Atsugi, Kanagawa 2430198, Japan
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 1, volume: 110, anno: 2001,
pagine: 441 - 452
SICI:
0001-4966(200107)110:1<441:DAMBOM>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
VOCAL-TRACT; MOVEMENTS; POINTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Kaburagi, T Kyushu Inst Design, Dept Acoust Design, Minami Ku, 4-9-1,Shiobaru, Fukuoka8158540, Japan Kyushu Inst Design 4-9-1,Shiobaru Fukuoka Japan8158540 Japan
Citazione:
T. Kaburagi e M. Honda, "Dynamic articulatory model based on multidimensional invariant-feature task representation", J ACOUST SO, 110(1), 2001, pp. 441-452

Abstract

A dynamic model of articulatory movements is introduced. The research presented herein focuses on the method of representing the phonemic tasks, i.e., phoneme-specific articulatory targets. Phonemic tasks in our model are formally defined using invariant features of articulatory posture. The invariant features used in the model are characterized by the linear transformation of articulatory variables and found using a statistical analysis of measured articulatory movements, in which the articulatory features with minimum variability are taken to be the invariant features. Articulatory movements making vocal-tract constrictions or relative movements among articulatorsreflecting task-sharing structures are typical examples of the features found to have low variability. In the trajectory formation of articulatory movements, the dimension number of the phonemic task is set at a smaller value than that of articulatory variables. Consequently, the kinematic states of the articulators are partly constrained at given time instants by a sequence of phonemic tasks, and there remain unconstrained degrees of freedom ofarticulatory variables. Articulatory movements are determined so that theysimultaneously satisfy given phonemic tasks and dynamic smoothness constraints. The dynamic smoothness constraints coupled with the underspecified phonemic targets allow our model to explain contextual articulatory variability using context-independent phonemic tasks. Finally, the capability of themodel for predicting actual articulatory movements is quantitatively investigated using empirical articulatory data. (C) 2001 Acoustical Society of America.

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Documento generato il 04/04/20 alle ore 15:28:30