Sciweavers

Share
CSL
2010
Springer

The Hidden Information State model: A practical framework for POMDP-based spoken dialogue management

11 years 1 months ago
The Hidden Information State model: A practical framework for POMDP-based spoken dialogue management
This paper explains how Partially Observable Markov Decision Processes (POMDPs) can provide a principled mathematical framework for modelling the inherent uncertainty in spoken dialogue systems. It briefly summarises the basic mathematics and explains why exact optimisation is intractable. It then describes in some detail a form of approximation called the Hidden Information State model which does scale and which can be used to build practical systems. A prototype HIS system for the tourist information domain is evaluated and compared with a baseline MDP system using both user simulations and a live user trial. The results give strong support to the central contention that the POMDP-based framework is both a tractable and powerful approach to building more robust spoken dialogue systems.
Steve Young, Milica Gasic, Simon Keizer, Fran&cced
Added 09 Dec 2010
Updated 09 Dec 2010
Type Journal
Year 2010
Where CSL
Authors Steve Young, Milica Gasic, Simon Keizer, François Mairesse, Jost Schatzmann, Blaise Thomson, Kai Yu
Comments (0)
books