EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology
2nd INTERSPEECH Event

Aalborg, Denmark
September 3-7, 2001

                 

Language Models Conditioned on Dialog State

Karthik Visweswariah, Harry Printz

IBM, USA

We consider various techniques for using the state of the dialog in language modeling. The language models we built were for use in an automated airline travel reservation system. The techniques that we explored include (1) linear interpolation with state specific models and (2) incorporating state information using maximum entropy techniques. We also consider using the system prompt as part of the language model history. We show that using state results in about a 20% relative gain in perplexity and about a 9% percent relative gain in word error rate over a system using a language model with no information of the state.

Full Paper

Bibliographic reference.  Visweswariah, Karthik / Printz, Harry (2001): "Language models conditioned on dialog state", In EUROSPEECH-2001, 251-254.