Since lip movement sequence and language sequence are one-to-many mapping, it is far from sufficiency to use only HMM for lip-reading recognition.

由于唇动序列和语言序列是一对多的映射，计算机自动唇读识别仅使用HMM是远远不够的。

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Apart from sign language we can communicate with them by lip readings or other means such as body language gesture facial expression writing and drawing.

除了手语之外，我们可以透过唇读口语，或者身体语言、手势、表情、书写文字或图画，与失听人士沟通。

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