Construction and Optimization of a Question and Answer Database for a Real-environment Speech-oriented Guidance System

Oriental COCOSDA 2007, December 2007.In this paper, we describe a question and answer datavase (QADB), which is useful for constructiong a spoken dialog system. For building a real-environment speech-oriented dialog system, real user data are required. In order to collect these data, we have been employing a spoken guidance system since five years. A database of trainscriptions and appropriate responses, etc. has been constructed for 2 years of the collected utterances. Futhermore we introduce a QADB optimization method to exclude inappropriate data. Using this method, response accuracy improves by 1.6% to 75.7% absolute and by 2.9% to 59.8% about adults and children, respectively