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The Hidden Information State model: A practical framework for POMDP-based spoken dialogue management

机译：隐藏信息状态模型：基于POMDP的口语对话管理的实用框架

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摘要

This paper explains how Partially Observable Markov Decision Processes (POMDPs) can provide a principled mathematical framework for modelling the inherent uncertainty in spoken dialogue systems. It briefly summarises the basic mathematics and explains why exact optimisation is intractable. It then describes in some detail a form of approximation called the Hidden Information State model which does scale and which can be used to build practical systems. A prototype HIS system for the tourist information domain is evaluated and compared with a baseline MDP system using both user simulations and a live user trial. The results give strong support to the central contention that the POMDP-based framework is both a tractable and powerful approach to building more robust spoken dialogue systems.
机译：本文解释了部分可观察的马尔可夫决策过程（POMDP）如何为建模口语对话系统内在的不确定性提供原理性的数学框架。它简要总结了基本数学，并解释了为什么精确优化难以实现。然后，它详细描述了一种近似形式，称为“隐藏信息状态”模型，该模型可以缩放并可以用于构建实际系统。使用用户模拟和现场用户试用，对旅游信息领域的原型HIS系统进行了评估，并将其与基线MDP系统进行了比较。结果为以下主要论点提供了有力支持：基于POMDP的框架既是构建更健壮的语音对话系统的一种易处理又有力的方法。

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  • 来源
    《Computer speech and language》 |2010年第2期|150-174|共25页
  • 作者

    Steve Young; Milica Gasic; Simon Keizer; Francois Mairesse; Jost Schatzmann; Blaise Thomson; Kai Yu;

  • 作者单位

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

    Cambridge University Engineering Department, Trumpington Street, Cambridge, CB2 1PZ, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    statistical dialogue systems; POMDP; hidden information state model;

    机译：统计对话系统;POMDP;隐藏信息状态模型;

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