Integration of Ohman and Rule-based Coarticulation Models for Visualization of Pure Lithuanian Diphtongs

I Mazonaviciute,A Kriukovas,R Bausys

doi:10.5755/j01.eee.19.1.3260

I Mazonaviciute, A Kriukovas + Show 1 more

Open Access

https://doi.org/10.5755/j01.eee.19.1.3260

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Abstract

Visualization methodology for pure Lithuanian diphthongs that are influenced by neighbouring phonemes are presented. Ohman and Rule-based coarticulation control models are integrated. Rules for Lithuanian diphthong animation are defined based on Lithuanian phonology. Most of them can be realized using Ohman control model, others use linear interpolation of expressiveness parameters. The proposed coarticulation model can be successfully applied to define expressiveness coefficients in viseme-driven speech animation engines.DOI: http://dx.doi.org/10.5755/j01.eee.19.1.3260

Highlights

Movements of vocal organs which are involved in the production of speech sounds significantly improve the understanding of acoustic signal
In this paper we propose technique, how VVCV and VCVV utterances can be visualized using Ohman coarticulation model designed for VCCV phonetic structure
Ever since pure Lithuanian diphthongs regularly appear in Lithuanian words, their accurate visualization considerably improves the perspicuity of animated speech

Summary

INTRODUCTION

Movements of vocal organs which are involved in the production of speech sounds (articulators) significantly improve the understanding of acoustic signal. Computer generated 3D human head models, specified to animate synthesized or natural speech (talking heads) recently became an important part of human-computer communication. Invention of new speech animation engine is time consuming task and requires considerable financial support and specific knowledge. Translingual speech animation can be applied to save resources and to integrate a talking head based on phonetics in foreign language. Every language is unique and has specific phonetic rules for speech production. A coarticulation effect that refers to the situation in which a conceptually isolated speech sound is influenced by Manuscript received March 11, 2012; accepted May 14, 2012. Coarticulation control models [3] should be applied to govern the articulatory movements for a given phonetic target specification. The coarticulation control models can be expressed by a sequence of time labelled phonemes, including stress and phrasing markers

COMPARISON OF COARTICULATION CONTROL MODELS

COARTICULATION ANALYSIS OF LITHUANIAN DIPHTHONGS

PROPOSED FRAMEWORK FOR PURE LITHUANIAN DIPHTHONG VISUALIZATION

CONCLUSIONS