Multimodal Dialog System Using Hidden Information State Dialog Manager

Hidden Information State 대화 관리자를 이용한 멀티모달 대화시스템

  • Kim, Kyung-Duk (Intelligent Software Laboratory, Dept. of CSE , POSTECH) ;
  • Lee, Geun-Bae (Intelligent Software Laboratory, Dept. of CSE , POSTECH)
  • 김경덕 (포항공과대학교 컴퓨터공학과 지능소프트웨어 연구실) ;
  • 이근배 (포항공과대학교 컴퓨터공학과 지능소프트웨어 연구실)
  • Published : 2007.05.18


This paper describes a multimodal dialog system that uses Hidden Information State (HIS) method to manage the human-machine dialog. HIS dialog manager is a variation of classic partially observable Markov decision process (POMDP), which provides one of the stochastic dialog modeling frameworks. Because dialog modeling using conventional POMDP requires very large size of state space, it has been hard to apply POMDP to the real domain of dialog system. In HIS dialog manager, system groups the belief states to reduce the size of state space, so that HIS dialog manager can be used in real world domain of dialog system. We adapted this HIS method to Smart-home domain multimodal dialog system.