刘蓓,杜利民. 汉语口语对话系统中语义分析的消歧策略[J]. 中文信息学报, 2005, 19(1): 77-84.
LIU Bei , DU Li-min. The Disambiguation Strategy of Semantic Analysis in Spoken Dialogue Systems. , 2005, 19(1): 77-84.
汉语口语对话系统中语义分析的消歧策略
刘蓓,杜利民
中国科学院声学研究所语音交互信息技术研究中心,北京 100080
The Disambiguation Strategy of Semantic Analysis in Spoken Dialogue Systems
LIU Bei , DU Li-min
Center for Speech Interactive Information Technology ,Institute of Acoustics , Chinese Academy of Sciences , Beijing 100080 ,China
Abstract：Frame semantic analysis is one of the most commonly used semantic analysis method in Chinese spoken dialogue systems research. And the two typical ambiguous structures encountered in semantic analysis are outer-ambiguity and structural-ambiguity. According to the features of these two ambiguous structures , this paper puts forth the semantic PCFGmodel based disambiguation strategy to solve structural-ambiguity and the semantic ExpectationModel (EM) integrated disambiguation strategy to solve outer-ambiguity. Efficient algorithms of these two methods are also provided. The experimental results show that synthetically use of these two disambiguation methods can most greatly improve the performance of the understanding module of the base-line system. The sentence accuracy is improved from 7517 % to 9115 % , and the three targets of semantic understanding rate-correction , recall , and precision are also improved 10 % averagely.
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