Techniques for topic detection based processing in spoken dialog systems

In this paper we explore various techniques for topic detection in the context of conversational spoken dialog systems and also propose variants over known techniques to address the constraints of memory, accuracy and scalability associated with their practical implementation of spoken dialog systems. Tests were carried out on a multiple-topic spoken dialog system to compare and analyze these techniques. Results show benefits and compromises with each approach suggesting that the best choice of technique for topic detection would be dependent on the specific deployment requirements.