T-111.5550 Seminar on Multimedia Metadata Management Hannu Järvinen [email protected].
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Transcript of T-111.5550 Seminar on Multimedia Metadata Management Hannu Järvinen [email protected].
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Contents
1. Metadata in multimedia 2. Multimedia Domains 3. Storing metadata 4. Metadata Lifecycle 5. Use cases 6. MPEG-7 7. Downsides 8. Metadata versus content interpretation 9. Future
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Metadata on multimedia
Metadata is data about data Data about multimedia content ID3 tags in MP3 files Amount of multimedia available is rising up Semantic Web, Web 2.0
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Storing metadata
Internal, in a same file External, a separate file XML, binary, Exif..
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Metadata Lifecycle
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Use cases
Creating a content description manually Creating a content description
automatically Modifying existing metadata Searching content using metadata
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Creating a content description manually - Flickr Adding pictures to
Flickr service Browse files Add tags for all
images
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Creating a content description manually - Flickr Add descriptions
for each picture Modify tags Save and you
are ready
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Creating a content decription automatically - Exif Take a photograph with a digital camera Connect the camera to your PC and copy
the pictures Check the picture properties for data and
time, exposure time, location, etc.. Exif - Exchangeable image file format
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Modifying existing metadata - IMDb Give your vote to rate a movie at IMDb
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Searching content using metadata - Youtube Finding video content about a known sight
using Youtube
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MPEG-7
Multimedia Content Description Interface Not like MPEG-1, MPEG-2, MPEG-4 Aims to provide interoperability Offers system level functions for
operations to metadata Defines over 450 metadata types Possibility to create more
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MPEG-7 cont.
Most promising May be merged into one with other
standards (TV-Anytime), but basis on MPEG-7
Suitable for wide use Critics about having too much freedom on
structures and that it focuses on too wide area
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Downsides
Too expensive Hard to deside what to include Data size grows up Metadata is useless
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Metadata versus content interpretation
Metadata is not necessary Textual search engines, Google Content based image browsers Humming People want to use textual input for
searching
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Future
Metadata becomes more important Semantic Web Data will become smart
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Any questions?