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Informedia: News-on-Demand Experiments in Speech Recognition

Howard Wactlar, Alex Hauptmann, and Michael Witbrock
Workshop Paper, DARPA Speech Recognition Workshop (SRW '96), February, 1996
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In theory, speech recognition technology can make any spoken words in video or audio media usable for text indexing, search and retrieval. This article describes the News-on-Demand application created within the InformediaTM Digital Video Library project and discusses how speech recognition is used in transcript creation from video, alignment with closed-captioned transcripts, audio paragraph segmentation and a spoken query interface. Speech recognition accuracy varies dramatically depending on the quality and type of data used. Informal information retrieval test show that reasonable recall and precision can be obtained with only moderate speech recognition accuracy.


author = {Howard Wactlar and Alex Hauptmann and Michael Witbrock},
title = {Informedia: News-on-Demand Experiments in Speech Recognition},
booktitle = {Proceedings of DARPA Speech Recognition Workshop (SRW '96)},
year = {1996},
month = {February},
publisher = {Arden House},
address = {Harriman, NY},