MLSLib: A Lip Sync Library for Multi Agents and Languages.

This article presents MLSLib, a software library for human gure animation with lip syncing. The library enables us to easily use multiple TTS systems and multiple lip motion generators, and switch them arbitrarily. It also helps use of multiple speaking agents, possibly with di erent TTS systems and lip motion generators. The MLSLib is composed of three modules: LSSAgent, TTSManager, and FCPManager; The LSSAgent module provides uni ed simple APIs per single agent, independent of TTS systems and lip motion generators. The TTSManager and FCPManager manage TTS systems and lip motion generators, respectively. Both modules support standard sets of phonetic alphabets per language, and thus users are freed from TTS-dependent implementation of lip motion generators. Applications to multi-lingual agents and LOD in lip syncing are also presented.