The main works in this thesis as follow: 1 the basic knowledge of audio-visual speech recognition is studied, and the design is proposed for audio-visual vehicle control simulation system.

本文主要工作如下：(1)论述了双模态语音识别基本原理及相关技术，并提出了双模态车载语音控制仿真系统的设计方案。

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The experiments also show that the audio-visual continuous speech recognition system is robust in noisy environments.

基于特征口形的音频-视频混合连续语音识别系统具有很好的抗噪性。

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Lip is one of the most important facial features, and plays key roles in a variety of fields such as audio-visual speech, authentication, lip synchronization, face recognition, etc.

嘴唇是人脸特征的重要组成部分，在音视频识别、认证、嘴唇同步、人脸识别等方面都很重要。

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