First International Conference on Spoken Language Processing (ICSLP 90)

Kobe, Japan
November 18-22, 1990

Conversational Turn-Taking Model Using PETRI Net

Naotoshi Osaka

NTT Basic Research Laboratories, Tokyo, Japan

This paper deals with a newly proposed identification problem of the turn-taking (surface level exchange) pattern of spontaneous conversation using only the power patterns of two conversants. Some necessary concepts of turn-taking are first defined corresponding to the power pattern. A new algorithm, HSPN (Hidden Stochastic Petri Net) is introduced to identify Conversation Unit (CU), that is, turn-taking patterns. HSPN is equivalent to a multi channel coupled Hidden Markov Model (HMM), which incorporates synchronization of inter channel states. It is transformed into an ordinary Markov model using HSPN. A high CU correct rate is obtained for spontaneous conversation data.

Full Paper

Bibliographic reference.  Osaka, Naotoshi (1990): "Conversational turn-taking model using PETRI net", In ICSLP-1990, 1297-1300.