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Table 1 Three visemes of vowels

From: Inner lips feature extraction based on CLNF with hybrid dynamic template for Cued Speech

Vowels

Viseme

Phonemes

V1

a,ɛ,\( \tilde{\upvarepsilon} \),e,i

V2

\( \tilde{\mathrm{a}} \),ɔ,œ

V3

o,ø,,y,u