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- 2015
航班预定口语对话系统的设计与实现
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Abstract:
摘要 介绍一个航班预定口语对话系统的设计与实现, 该系统允许用户通过普通话进行航班信息查询与预定.重点介绍口语对话系统中的口语语言理解.为了克服语音识别引入的识别错误导致语义理解错误的问题, 提出基于词混淆网络的两阶段中文口语语言理解方法:首先从词混淆网络中选择N元文法作为分类特征, 进行主题分类, 并通过语义分类模型解析获取对应的语义树结构;然后利用基于规则的语义槽填充器抽取相应的语义槽属性-值.该方法是数据驱动的, 训练数据的标记比较容易.实验在汉语航班预定领域进行, 结果表明, 在语音识别字错误率很高的情况下, 该方法比传统的基于语法规则的语言理解方法更加鲁棒, 在语义理解正确率方面有明显改善.
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