Speech dialogue system for facilitating human-computer interaction

摘要

A speech dialogue system capable of realizing natural and smooth dialogue between the system and a human user, and easy maneuverability of the system. In the system, a semantic content of an input speech from a user is understood and a semantic determination of a response output content is made according to the understood semantic content of the input speech. Then, a speech response and a visual response according to the determined response output content are generated and outputted to the user. The dialogue between the system and the user is managed by controlling transitions between user states in which the input speech is to be entered and system states in which the system response is to be outputted. The understanding of a semantic content of an input speech from a user is made by detecting keywords in the input speech, with the keywords to be detected in the input speech limited in advance, according to a state of a dialogue between the user and the system.