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

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Presentation transcript:

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 Ontology for Media Resources 1.0 API for Media Resources 1.0

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

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.

Definition of metadata properties for multimedia objects: Ontology for Media Resource 1.0 Example properties ma:contributor ma:language ma:compression... From

Relating properties to existing formats ma:contributor in YouTube Data API Protocol dc:creator in XMP exact related to

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

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

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

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:"?

Resources Working Group Homepage Use Cases and Requirements for Ontology and API for Media Object Ontology for Media Resources API for Media Resources 1.0

Thank you for your attention!