Patent ID: 9570064
Date: 2017-02-14
CPC Classifications: G10L

Claim:
1. A conversation-sentence generation device that generates a conversation sentence of a virtual agent having a personified conversation with a user, comprising: a memory that stores a physical state and a psychological state of the virtual agent as an agent state; a processor configured to act as: an input unit that receives, as input information, a conversation sentence given from the user to the virtual agent, and clue information based on which the physical state and the psychological state of the agent is estimated; an agent state estimating unit that estimates a new agent state based on the input information and the agent state; an utterance intention generating unit that generates, based on the input information and the agent state, an utterance intention directed from the virtual agent to the user; a conversation sentence generating unit that generates, based on the input information, the agent state, and the utterance intention, a conversation sentence given from the virtual agent to the user, the conversation sentence generating unit preparing a plurality of conversation sentence generation rules containing descriptions of different conversation sentences for an identical condition, and selecting a conversation sentence among the different conversation sentences not used during a prior conversation with the identical condition in which the input information, the agent state, and the utterance intention are the same; and an output unit that outputs the conversation sentence generated by the conversation sentence generating unit.