Bridging the Gap Between Time- and Structure-Based Navigation in Web Lectures

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Mertens, R., Brusilovsky, P., Vornberger, O. & Ishchenko, S. (2009). Bridging the Gap Between Time- and Structure-Based Navigation in Web Lectures. International Journal on E-Learning, 8(1), 89-105. Chesapeake, VA: AACE.
Retrieved from http://www.editlib.org/p/24461.

Journal Information

International Journal on E-Learning
ISSN 1537-2456
Volume 8, Issue 1, January 2009
Association for the Advancement of Computing in Education (AACE)  Chesapeake, VA

More Information on IJEL

Authors

Robert Mertens, Fraunhofer IAIS, Germany; Peter Brusilovsky, University of Pittsburgh, USA; Oliver Vornberger, Sergey Ishchenko, University of Osnabrück, Germany

Abstract

Typical web lectures consist of two different kinds of media linked together: an audio- or video-recording and the corresponding slides or desktop recording. Both media are synchronized so that the slide or image shown corresponds to the position currently played in the time-based media stream. Web lectures are thus composite media consisting of a structured presentation and a continuous media stream. Current navigation paradigms focus on either one of these components. Time-based overviews do, however, provide different contextual information than structural overviews and vice versa. Instead of enhancing either time- or structure-based navigation by establishing unidirectional connections to structure and time respectively, the approach presented in this article connects time- and structure-based navigation in a bidirectional fashion to combine the advantages of both navigation paradigms.

Keywords

• Information Sciences
• Educational Technology
• eLearning
• Human Computer Interaction
• Internet
• Multimedia
• Navigation
• Software
• Video

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