Interlinking Multimedia: How to Apply Linked Data Principles to Multimedia Fragments - LDOW'09

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Talk given at the 2nd Linked Data on the Web workshop (LDOW) co located with WWW 2009, Madrid, April 2à

Talk given at the 2nd Linked Data on the Web workshop (LDOW) co located with WWW 2009, Madrid, April 2à

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  • 1. Interlinking Multimedia: How to Apply Linked Data Principles to Multimedia Fragments Michael Hausenblas, < [email_address] >, Raphaël Troncy , < [email_address] >, Tobias Bürger, < [email_address] >, Yves Raimond, < [email_address] >
  • 2. Where is the Triumph Arc? http://www.flickr.com/photos/40001315@N00/2705120551 /
  • 3. Who is Saphira? http://www.flickr.com/photos/mhausenblas/2883727293/
    • Region-based annotation in Flickr ... but it cannot be taken out of Flickr
      • the flickr note provides a URI for the region, but one needs to access the flickr API to access the region [ CaMiCatzee ]
  • 4. Clinton Laughing with Yeltsin? http://www.youtube.com/watch?v=sxoh1z6s_Cw#t=15s
    • Temporal annotation in YouTube ... but the UA downloads the complete resource and seeks ... and the YouTube syntax is different from Google Video, Vimeo, DailyMotion, etc.
  • 5. Problems
    • How to address and retrieve parts of multimedia content?
      • region of an image / sequence of a video
    • How to describe parts of multimedia content in the Web of Data?
    PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT ?Clip WHERE { ?Clip foaf:depicts dbpedia:Laughter , yago:PresidentsOfTheRussianFederation , yago:President110468559 . }
  • 6. Answer abstract queries
    • Find all sequences with a Russian President laughing with another President
    dbpedia:Boris_Yeltsin rdf:type yago:PresidentsOfTheRussianFederation dbpedia:Vladimir_Putin rdf:type yago:PresidentsOfTheRussianFederation #t=34s #t=15s
  • 7. iM: Interlinking Multimedia
    • Apply linked data principles for fine-grained identification and description of multimedia fragments [ W3C Media Fragments WG ]
    • Deploy legacy multimedia metadata formats on the web of data [ ramm.x ]
    • Specialized interlinking methods for multimedia
      • User-contributed interlinking, game-based
      • Collaborative interlinking: MetaVidWiki [ MVW ]
      • (Semi-)Automatic methods: multimedia analysis
  • 8. W3C Media Fragments WG
    • Provide URI-based mechanisms for uniquely identifying fragments for media objects on the Web, such as video, audio, and images.
  • 9. Scenario 1: retrieve the media content
    • User Agent (media fragment conforming) : http:// www.youtube.com/watch?v =sxoh1z6s_Cw#12,21
      • GET / watch?v =sxoh1z6s_Cw HTTP/1.1 Host: www.youtube.com Accept: video/* Range: seconds=12-21 [ HTTPBis clarification ]
    • Server:
  • 10. Scenario 2: retrieve a semantic representation of the media content
    • User Agent:
      • GET / watch?v =sxoh1z6s_Cw HTTP/1.1 Host: www.youtube.com Accept: application/rdf+xml Range: seconds=12-21
    • Server:
  • 11. Discussion
    • Is conneg-ing between rdf+xml and video/* a good behavior?
      • Current configuration of jigsaw [ W3C Photo RDF ]
      • Equivalent: « Content is &quot;equivalent&quot; to other content when both fulfill essentially the same function or purpose upon presentation to the user » [ WAG ]
      • Abuse of content negotiation: what is the sameness of two representations of a resource?
    • How to draw the line?
      • Are an image and its ASCII version close enough to be content negotiated?
      • Is a transcoded media content still a fragment?
  • 12. More Resources
    • Use Cases and Requirements for Media Fragments http://www.w3.org/TR/media-frags-reqs
    • Interlinking Multimedia http://www.interlinkingmultimedia.info/
    • Continue the discussion @ LOD http://lists.w3.org/Archives/Public/public-lod/