Suggest edit — Dialogue State Architecture

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---
title: "Dialogue State Architecture"
type: concept
related: [Ner Tagging, Gus, Dialogue State Architecture]
source: https://www.jemoka.com/posts/kbhdialogue_state_architecture/
confidence: high
status: active
---

Dialogue State Architecture uses dialogue acts instead of simple frame filling to perform generation; used currently more in research.
NLU: slot fillers to extract user&rsquo;s utterance, using ML Dialogue State Tracker: maintains current state of dialogue Dialogue policy: decides what to do next (think GUS&rsquo; policy: ask, fill, respond)&mdash;but nowaday we have more complex dynamics NLG: respond dialogue acts dialogue acts combines speech-acts with underlying states
slot filing we typically do this with BIO Tagging with a BERT just like NER Tagging, but we tag for frame slots.
the final &lt;cls&gt; token may also work to classify domain + intent.
corrections are hard folks sometimes uses hyperarticulation (&ldquo;exaggerated prosody&rdquo;) for correction, which trip up ASR
correction acts may need to be detected explicitly as a speech act:
dialogue policy we can choose over the last frame, agent and user utterances:
\begin{equation} A = \arg\max_{a} P(A|F_{i-1}, A_{i-1}, U_{i-1}) \end{equation}
we can probably use a neural architecture to do this.
whether to confirm via ASR confirm:
\(&lt;\alpha\): reject \(\geq \alpha\): confirm explicitly \(\geq \beta\): confirm implicitly \(\geq \gamma\): no need to confirm NLG once the speech act is determined, we need to actually go generate it: 1) choose some attributes 2) generate utterance
We typically want to delexicalize the keywords (Henry serves French food =&gt; [restraunt] serves [cruisine] food), then run through NLG, then rehydrate with frame.