Abstract

In theory, speech recognition technology can make any spoken words in video or audio media subject to text indexing, search and retrieval. This article describes the News-on-Demand application created within the Informedia Digital Video Library project and discusses how speech recognition is used for transcript creation from video, time alignment of closed-captioned transcripts, a speech query interface, and audio paragraph segmentation. Our results show that speech recognition accuracy varies dramatically depending on the quality and type of data used, but the system is quite useable with only moderate speech recognition accuracy.

Citations