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Media Annotations Working Group – overview Joakim Söderberg / Felix Sasaki Contribution to

Media Annotations Working Group – overview Joakim Söderberg / Felix Sasaki Contribution to "Accessibility of Media Elements in HTML 5 Workshop" November 1 st 2009. Purpose. Facilitate metadata integration for media objects in the Web, such as video, audio and images Main means

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Media Annotations Working Group – overview Joakim Söderberg / Felix Sasaki Contribution to

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  1. Media Annotations Working Group – overview Joakim Söderberg / Felix Sasaki Contribution to "Accessibility of Media Elements in HTML 5 Workshop" November 1st 2009

  2. Purpose • Facilitate metadata integration for media objects in the Web, such as video, audio and images • Main means • Ontology for Media Resources 1.0 • API for Media Resources 1.0

  3. MAWG Vision • User sees an API, simple • handling only texts and URI • An Ontology relates the • different metadata formats • (this is hidden to the user) • Mapping is provided by MAWG

  4. Some formats in sight • Formats: • XMP • DublinCore • ID3 (metadata in audio) • EXIF (metadata in images) • Media RSS • IPTC (news) • MPEG7 • TV-Anytime • FRBR (multilevel description) • Youtube Data API Protocol • Other: SMPTE, LOM, METS, Cablelabs ADI 2.0, MIX, VRA etc.

  5. Definition of metadata properties for multimedia objects:Ontology for Media Resource 1.0 • Example properties • ma:contributor • ma:language • ma:compression • ... From http://www.w3.org/TR/mediaont-10/

  6. Relating properties to existing formats • ma:contributor related to exact media:credit@role in YouTube Data API Protocol dc:creator in XMP

  7. Relating properties to existing formats • ma:contributor related to exact media:credit@role in YouTube Data API Protocol dc:creator in XMP semantic mappings: exact, related to, more specific, more general (motivated by SKOS)

  8. Relating properties to existing formats • ma:contributor syntactic mappings, e.g. "Unicode string" in XMP related to exact media:credit@role in YouTube Data API Protocol dc:creator in XMP semantic mappings: exact, related to, more specific, more general

  9. API for Media Resource 1.0 • Implementing the mappings from the ontology • Proving access methods • Example for ma:contributor property interface Contributors: Unstructured { attribute DOMString id; attribute DOMString role; }; From http://www.w3.org/TR/mediaont-api-1.0/#contributors

  10. Challenges • General • Reading "easy part" ... but how to (or if to) write "ma:" properties into media files • Getting verification of mappings (needs to be based on actual usage, not on the specifications) • Specific to Accessibility • (How) does the media annotations approach (ontology and API) fit to Accessibility needs? • Are there Accessibility-related properties to be related into "ma:"?

  11. Resources • Working Group Homepage http://www.w3.org/2008/WebVideo/Annotations/ • Use Cases and Requirements for Ontology and API for Media Object 1.0 http://www.w3.org/TR/media-annot-reqs • Ontology for Media Resources 1.0 http://www.w3.org/TR/mediaont-10/ • API for Media Resources 1.0 http://www.w3.org/TR/mediaont-api-1.0/

  12. Thank you for your attention!

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