Research on Speech Act Classification Based on Multi-phase and Hierarchical Approach
Xinmiao Li · 2012
Previous Speech Act(SA) is considered as an important feature in speech act classification.However,how to effectively use previous SA is a critical challenge because it's unknown on test corpus.This paper illustrates that both the level of previous SA and the sequence of running SA classifiers have significant impact on classification effect,and thus proposes a multi-phase and hierarchical based approach which will suggest a good level of previous SA and a good order of running classifiers.Results on blind test corpus demonstrate that the parameters selected by our approach could steadily increase the classification accuracy for each category.