Papers › Time Masking: Leveraging Temporal Information in Spoken Dialogue Systems

Time Masking: Leveraging Temporal Information in Spoken Dialogue Systems

25 Jul 2019WS 2019 9arXiv:1907.11315archive 2025-07-28

Rylan Conway, Lambert Mathias

In a spoken dialogue system, dialogue state tracker (DST) components track the state of the conversation by updating a distribution of values associated with each of the slots being tracked for the current user turn, using the interactions until then. Much of the previous work has relied on modeling the natural order of the conversation, using distance based offsets as an approximation of time. In this work, we hypothesize that leveraging the wall-clock temporal difference between turns is crucial for finer-grained control of dialogue scenarios. We develop a novel approach that applies a {\it time mask}, based on the wall-clock time difference, to the associated slot embeddings and empirically demonstrate that our proposed approach outperforms existing approaches that leverage distance offsets, on both an internal benchmark dataset as well as DSTC2.

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