SIBI (Sign System Indonesian Language) Text-to-3D Animation Translation Mobile Application

Erdefi Rakun, Sultan Muzahidin, IGM Surya A. Darmana, Wikan Setiaji

Research output: Contribution to journalArticlepeer-review


This research proposed a mobile application prototype to translate Indonesian text into SIBI (Sign System for the Indonesian Language) 3D gestures animation to bridge the communication gap between the deaf and the other. To communicate in sign language, the signer will use his/her hands and fingers to demonstrate the word gesture, and at the same time, his/her mouth will pronounce the word being expressed. Therefore, the proposed mobile application needs two animation generator components: the hand gesture and the lip movement generator. Hand gestures are made using a motion capture sensor. Mouth movements are created for all syllables available in the SIBI dictionary using the Dirichlet Free-Form Deformation (DFFD) method. The subsequent challenging work is synchronizing these two components and adding transitional gestures. A transitional gesture done by the cross-fading method is needed to make a word gesture that can smoothly connect with the next word gesture. The Mean Opinion Score (MOS) test was run to measure the mouth movements in 3D animation. The MOS score is 4.422. There are four surveys conducted to measure user satisfaction. The surveys showed that the animation generated did not significantly differ from the original video. The Sistem Usability Score (SUS) is 76.25. The score means that prototype is in the GOOD category. The average time needed to generate an animation from Indonesian input text is less than 100ms.

Original languageEnglish
Pages (from-to)440-450
Number of pages11
JournalInternational Journal of Advanced Computer Science and Applications
Issue number9
Publication statusPublished - 2022


  • Animation
  • Sequence generation
  • Sibi sign language
  • Visual speech


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