Sequential Dialogue Context Modeling for Spoken Language Understanding

Ankur Bapna, Gokhan Tür, Dilek Hakkani-Tür, Larry Heck


Abstract
Spoken Language Understanding (SLU) is a key component of goal oriented dialogue systems that would parse user utterances into semantic frame representations. Traditionally SLU does not utilize the dialogue history beyond the previous system turn and contextual ambiguities are resolved by the downstream components. In this paper, we explore novel approaches for modeling dialogue context in a recurrent neural network (RNN) based language understanding system. We propose the Sequential Dialogue Encoder Network, that allows encoding context from the dialogue history in chronological order. We compare the performance of our proposed architecture with two context models, one that uses just the previous turn context and another that encodes dialogue context in a memory network, but loses the order of utterances in the dialogue history. Experiments with a multi-domain dialogue dataset demonstrate that the proposed architecture results in reduced semantic frame error rates.
Anthology ID:
W17-5514
Volume:
Proceedings of the 18th Annual SIGdial Meeting on Discourse and Dialogue
Month:
August
Year:
2017
Address:
Saarbrücken, Germany
Venues:
SIGDIAL | WS
SIG:
SIGDIAL
Publisher:
Association for Computational Linguistics
Note:
Pages:
103–114
Language:
URL:
https://www.aclweb.org/anthology/W17-5514
DOI:
10.18653/v1/W17-5514
Bib Export formats:
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PDF:
http://aclanthology.lst.uni-saarland.de/W17-5514.pdf