Patent ID: 11862167
Assignee: NTT DOCOMO, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A model generation device that generates a barge-in speech determination model determining whether to engage barge-in speech which is user speech produced to cut off ongoing output of system speech in a spoken dialogue system performing a dialogue with a user by outputting the system speech formed by a voice with respect to the user speech formed by the voice produced by the user, the model generation device comprising circuitry configured to:
acquire the user speech and immediately previous system speech which is system speech output immediately before the user speech;
extract a user speech feature series obtained by dividing the user speech into user speech elements of a time with a predetermined length and chronologically disposing acoustic features of the user speech elements based on the user speech;
extract a system speech feature series obtained by dividing the immediately previous system speech into system speech elements of a time with a predetermined length and chronologically disposing acoustic features of the system speech elements based on the immediately previous system speech;
grant identification information to the system speech element included in a morpheme which, among morphemes included in the immediately previous system speech, corresponds to a predetermined part of speech and does not correspond to a response candidate acquired from a dialogue scenario that has a mutual response rule between the user speech and the system speech and assumed to be the immediately previous system speech by the user among the plurality of system speech elements included in the system speech feature series;
acquire a correct label associated with the user speech element included in a morpheme that is not engaged in the dialog control of the spoken dialogue system among morphemes included in the user speech;
perform machine learning based on learning data including the user speech feature series, the system speech feature series including the identification information, and the correct label and generate a barge-in speech determination model that receives the user speech feature series based on the user speech and the system speech feature series including the identification information based on the immediately previous system speech as inputs, and outputs a likelihood of each user speech element not being engaged in the dialogue control of the spoken dialogue system as an output, each user speech element being included in the user speech; and
output the barge-in speech determination model generated by the circuitry.