| Summary: | We propose a framework for augmenting archives of webcast lectures at alow
benefit/cost ratio that finesses the issue of costly video post-production,
while still significantly enhancing the quality of the webcast. We argue that
lightweight augmentations such as alternate slide tracks, video re-orderings
via timeline pointers, and simple groupings of related video and slide con
tent, will allow webcast producers to not only deliver an adequately polished
version of the original webcast, but also to re-use and re-purpose archived
webcasts for different audiences and different perspectives on the same con
tent.
A prototype application for viewing these kinds of augmented webcast
archives was developed, and a user study was conducted to determine the
benefits of augmenting an archived webcast lecture in such a way. Our
results suggest that augmentations make the webcast itself easier to navigate,
and improve comprehension of material enough that selective viewing and
navigation of the augmented lecture is comparable to simply watching the
lecture in its entirety without augmentations. === Science, Faculty of === Computer Science, Department of === Graduate
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