1. T-111.5550 Seminar on Multimedia Metadata Management Hannu Järvinen Hannu.Jarvinen@tml.hut.fi

2. 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

3. 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

5. Storing metadata Internal, in a same file External, a separate file XML, binary, Exif..

6. Metadata Lifecycle

7. Use cases Creating a content description manually Creating a content description automatically Modifying existing metadata Searching content using metadata

8. Creating a content description manually - Flickr Adding pictures to Flickr service Browse files Add tags for all images

9. Creating a content description manually - Flickr Add descriptions for each picture Modify tags Save and you are ready

10. 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

11. Modifying existing metadata - IMDb Give your vote to rate a movie at IMDb

12. Searching content using metadata - Youtube Finding video content about a known sight using Youtube

13. 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

14. 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

15. Downsides Too expensive Hard to deside what to include Data size grows up Metadata is useless

16. 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

17. Future Metadata becomes more important Semantic Web Data will become smart

18. Any questions?