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Multimedia on the Semantic Web

Multimedia on the Semantic Web. Jacco van Ossenbruggen Multimedia and Human-Computer Interaction (INS2) CWI Amsterdam. Talk overview. Three generations Web content Requirements: second & third generation multimedia Demo CWI’s Cuypers engine realising second generation multimedia

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Multimedia on the Semantic Web

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  1. Multimedia on the Semantic Web Jacco van Ossenbruggen Multimedia and Human-Computer Interaction (INS2) CWI Amsterdam

  2. Talk overview • Three generations Web content • Requirements: • second & third generation multimedia • Demo CWI’s Cuypers engine • realising second generation multimedia • Future directions • towards third generation multimedia:a media-friendly Semantic Web

  3. The Web in three generations 1. Hand-coded (HTML) Web content • easy access through uniform interface • huge authoring and maintenance effort • hard to deal with dynamically changing content 2. Automated on-the fly content generation • based on templates filled with database content • later extended with XML document transformations 3. Automated processing of content • The Semantic Web

  4. Who’s afraid of the Semantic Web? • It is not about “blue sky” researchers trying to model the entire world… • Instead, the Semantic Web: • proposes explicit meta-data instead of “screen scraping” • by using agreed upon semantics (ontologies) • building on proven Web technology (XML, RDF, OIL) • Lot of current activity: • W3C Semantic Web Activity (RDF, WebONT) • OntoWeb (EU funded, > 80 partners, including CWI) • DAML (huge DARPA funded project)

  5. …back to multimedia • Real multimedia Web content is still rare • Mostly bells & whistles to enhance HTML text … • … or mono-media AV-streams • Virtually all presentations are hand-authored • proprietary formats that are hard to generate • limited support for dynamic content and multichanneling • most Web technology is text/page-oriented … • … with SMIL as one of the few exceptions • Conclusion: • Multimedia has hardly caught • up with the 1stgeneration Web

  6. Example scenario User is interested in Rembrandt and wants to know about the “chiaroscuro” technique System responds with textual explanation of the technique and a number of example images of its application in Rembrandt’s paintings

  7. Adapt to end-user’s platform capabilities multichanneling: PC, PDA, mobile, voice-only, ... Adapt to the network resources available bandwidth and other quality of service parameters Personalization language, abilities, level of expertise, .. Problem: current 2nd generation Web toolsdo not work for multimedia Need for 2ndgeneration multimedia

  8. Cuypers multimedia generation engine

  9. Cuypers multimedia generation engine • Demo time • Acknowledgements: • Demonstrator developed in the context of the ToKeN2000 project • Media database used with permission, courtesy Rijksmuseum Amsterdam.

  10. Cuypers multimedia generation engine • Demo time The bad news: currently all our design knowledge is: • implicit and hidden in the generation rules • lost in the generated Web presentation • not reusable for other Web applications/sites

  11. Semantic Web Potential Knowledge Sources

  12. Multimedia is still mostly first generation hand-authored presentations common Web-tools are too text-centric CWI’s Cuypers system realises second generation on-the-fly multimedia generation media-centric transformations Third generation is topic of our current research generating annotated multimedia reusing knowledge available on the Semantic Web Conclusions

  13. Take home message Multimedia on the Semantic Web: Semantic Web: next generation of the Web Multimedia aspects still needs lot of work Thanks for your attention

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