Simultaneous Summarization of Japanese Spoken Monologue for Real-time Captioning

The development of a captioning system that supports the real-time understanding of monologue speech such as lectures and commentary is now in demand. In a realtime captioning system, it is necessary to summarize speech so that the audience can understand it within the display time and to output the caption simultaneously with the monologue speech input. This paper proposes a technique for simultaneous summarization of Japanese spoken monologue toward real-time captioning. Our technique identifies a unit for which the summarization is executed each time a clause boundary is detected. Then our technique summarizes it based on the dependency structure. An experiment using Japanese monologues has shown the feasibility of our technique.