CUED Publications database

POMDP-based statistical spoken dialog systems: A review

Young, S and Gašić, M and Thomson, B and Williams, JD (2013) POMDP-based statistical spoken dialog systems: A review. Proceedings of the IEEE, 101. pp. 1160-1179. ISSN 0018-9219

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Abstract

Statistical dialog systems (SDSs) are motivated by the need for a data-driven framework that reduces the cost of laboriously handcrafting complex dialog managers and that provides robustness against the errors created by speech recognizers operating in noisy environments. By including an explicit Bayesian model of uncertainty and by optimizing the policy via a reward-driven process, partially observable Markov decision processes (POMDPs) provide such a framework. However, exact model representation and optimization is computationally intractable. Hence, the practical application of POMDP-based systems requires efficient algorithms and carefully constructed approximations. This review article provides an overview of the current state of the art in the development of POMDP-based spoken dialog systems. © 1963-2012 IEEE.

Item Type: Article
Uncontrolled Keywords: Belief monitoring partially observable Markov decision process (POMDP) policy optimization reinforcement learning spoken dialog systems (SDSs)
Subjects: UNSPECIFIED
Divisions: Div F > Machine Intelligence
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:41
Last Modified: 22 Dec 2014 01:20
DOI: 10.1109/JPROC.2012.2225812