Voice animator: Automatic lip-synching in limited animation by audio

Shoichi Furukawa*, Tsukasa Fukusato, Shugo Yamaguchi, Shigeo Morishima

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


Limited animation is one of the traditional techniques for producing cartoon animations. Owing to its expressive style, it has been enjoyed around the world. However, producing high quality animations using this limited style is time-consuming and costly for animators. Furthermore, proper synchronization between the voice-actor’s voice and the character’s mouth and lip motion requires well-experienced animators. This is essential because viewers are very sensitive to audio-lip discrepancies. In this paper, we propose a method that automatically creates high-quality limited-style lip-synched animations using audio tracks. Our system can be applied for creating not only the original animations but also dubbed ones independently of languages. Because our approach follows the standard workflow employed in cartoon animation production, our system can successfully assist animators. In addition, users can implement our system as a plug-in of a standard tool for creating animations (Adobe After Effects) and can easily arrange character lip motion to suit their own style. We visually evaluate our results both absolutely and relatively by comparing them with those of previous works. From the user evaluations, we confirm that our algorithms is able to successfully generate more natural audio-mouth synchronizations in limited-style lip-synched animations than previous algorithms.

Original languageEnglish
Title of host publicationAdvances in Computer Entertainment Technology - 14th International Conference, ACE 2017, Proceedings
EditorsMasahiko Inami, Teresa Romao, Adrian David Cheok, Adrian David Cheok
PublisherSpringer Verlag
Number of pages19
ISBN (Print)9783319762692
Publication statusPublished - 2018
Event14th International Conference on Advances in Computer Entertainment Technology, ACE 2017 - London, United Kingdom
Duration: 2017 Dec 142017 Dec 16

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume10714 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other14th International Conference on Advances in Computer Entertainment Technology, ACE 2017
Country/TerritoryUnited Kingdom


  • Animation filtering
  • Limited animations
  • Lip-synching

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)


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