关键词: 语音驱动, 人脸动画, 虚拟现实, 神经网络

Abstract: Using speech data to drive facial animation is an important intellectual technology in areas such as Virtual Reality（VR）. Recently the rapid development of VR stresses an urgent need for natural human-computer communication in immersive environment. The speech-driven facial animation technology can produce vivid animation with emotion, thus it can better help human-computer interaction and improve users’ experience compared with the traditional presupposed facial animation. In order to improve theintelligenceofthis technology and its applications, focusing on the key issue of speech-driven facial animation：audio and video mapping, methods including frame by frame analyzation, multi-frame analyzation and phoneme by phoneme analyzation are reviewed. Meanwhile, ideas of several facial models, means of animation synthesis, emotion fusion andevaluation are summarized, and possible directions for future studies are provided.

Key words: speech driven, facial animation, Virtual Reality（VR）, neural networks