1. Euscreen workshop AudiovisualHeritage and Participatory Culture Johan Oomen Sound and Vision / Vrije Universiteit Amsterdam

2. “In the end, the crowdstillrules. To be smart at the top, the system has to be smart all the waythrough.” (Surowiecki , 2004)

3. www.waisda.nl Inspiredby the work of Luis vonAhn (amongothers) The goal of the game is consensus betweenplayers (whichalsoworks as filter) Fun and competition as motivation Almost 600 hours of material / 2.400+ items

4. ESP Game and steve.museum

5. Why? Bridging the semantic gap Add more (+ fine grained) knowledge Time-related metadata (inter-video search) Role in workprocesses of the future Interactionbetween the archive /broadcaster and the public 160k people are volunteering in CH in the Netherlands (win-win)

8. Basicrule – players score pointswhentheirtagexactly matches the tagenteredbyanotherplayerwithin 10 seconds Multiple otherscoringmechanisms to createvarioustagincentives

11. Results (cont.) Matches Waisda? (= 42,068 uniquetags have matches) Matches GTAA & Cornetto (= 14,493) 1/3 of all words are a valid Dutch word

12. Tagevaluationbydocumentalists Farmer wants a Wife, Westerman’s New World Tagsdescribemainly short segments, and are oftennotveryspecific. Tags do oftennotdescribe programmes as a whole. BUT! Canbesolvedbyapplyingontologyalignment. The WNW tagswere most useful and specific: content of a programmeinfluencestagsspecificity.

14. Future: SemanticTagging

15. twitter: johanoomen joomen@beeldengeluid.nl Promote the use of television content to exploreEurope'srich and diverse culturalhistory.