1. 1 The eLecture Portal An Advanced Archive for Lecture Recordings Christoph Hermann, Wolfgang Hürst, Martina Welte Institut für Informatik Albert-Ludwigs-Universität Freiburg hermann@informatik.uni-freiburg.de

2. 2 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Overview Learning with eLectures The eLecture-Portal –Archiving –Searching –Podcasting Future Developments

3. 3 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Learning with eLectures Current situation: almost all lectures are recorded

4. 4 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Production Live-recording during the lecture using a microphone and a Wacom desk Only minor postprocessing by one student required; mostly automatic A few hours after the lecture the recordings are online

5. 5 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik The eLecture-Portal: Archiving Archival of the entire computer science curriculum Other disciplines are also listed (Microsystems Engineering, Psychology...)

6. 6 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Searching Automatic indexing of all lectures –Slides –Metadata –Audio Automatic speech transcription to index additional data Mapping of original slides to the recorded document Optimized user interface (e.g. one-click access to position of the hit)

7. 7 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Getting the most out of the documents Analyzing metadata –title, author, date,... –additional manual editing is too time expensive Grabbed presentations => matching of original slides with the recorded presentation Audio transcription 1.audio extraction 2.automatic processing of the recorded speech to textual information 3.indexing files

8. 8 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Some statistics Whole computer science curriculum can be accessed online One lecture has between 10 and 100mb (varies depending on the format) ~ 50.000 visits this year already (~ 5000 visits/month) ~ 6000 hits/day 25 TB data downloaded (in 2006 so far) ~ 3-600 gb/month

9. 9 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Current Work: Podcasting Converting the recorded lectures to podcasts RSS Feeds to inform the Students about new Recordings

10. 10 2006-09-12Christoph Hermann - Universität Freiburg - Institut für Informatik Conclusion/Outlook Heavy use of the portal by our students Problem of handling such a large amount of data Consider enhancing and changing technologies (e.g. Podcasting) Permission problem -Professors dont want their material to be accessible by everyone Property rights? -Stealing/trading of contents