Dynamic Bayesian socio-situational setting classification

Abstract

We propose a dynamic Bayesian classifier for the socio-situational setting of a conversation. Knowledge of the socio-situational setting can be used to search for content recorded in a particular setting or to select context-dependent models in speech recognition. The dynamic Bayesian classifier has the advantage - compared to static classifiers such a naive Bayes and support vector machines - that it can continuously update the classification during a conversation. We experimented with several models that use lexical and part-of-speech information. Our results show that the prediction accuracy of the dynamic Bayesian classifier using the first 25% of a conversation is almost 98% of the final prediction accuracy, which is calculated on the entire conversation. The best final prediction accuracy, 88.85%, is obtained by bigram dynamic Bayesian classification using words and part-of-speech tags.