Williams, JD and Young, S (2006) Scaling POMDPs for dialog management with composite summary point-based value iteration (CSPBVI). AAAI Workshop - Technical Report, WS-06-. pp. 37-42.Full text not available from this repository.
Although partially observable Markov decision processes (POMDPs) have shown great promise as a framework for dialog management in spoken dialog systems, important scalability issues remain. This paper tackles the problem of scaling slot-filling POMDP-based dialog managers to many slots with a novel technique called composite point-based value iteration (CSPBVI). CSPBVI creates a "local" POMDP policy for each slot; at runtime, each slot nominates an action and a heuristic chooses which action to take. Experiments in dialog simulation show that CSPBVI successfully scales POMDP-based dialog managers without compromising performance gains over baseline techniques and preserving robustness to errors in user model estimation. Copyright © 2006, American Association for Artificial Intelligence (www.aaai.org). All rights reserved.
|Divisions:||Div F > Machine Intelligence|
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|Date Deposited:||15 Dec 2015 12:45|
|Last Modified:||01 May 2016 22:55|