Context information exchange and sharing in a peer-to-peer community: a video annotation scenario

  • Authors:

  • Roberto Fagá, Jr.;Bruno C. Furtado;Felipe Maximino;Renan G. Cattelan;Maria da Graça C. Pimentel

  • Affiliations:

  • University of São Paulo, Sâo Carlos, Brazil;University of São Paulo, São Carlos, Brazil;University of São Paulo, São Carlos, Brazil;Federal University of Uberlândia, Uberlândia, Brazil;University of São Paulo, São Carlos, Brazil

  • Venue:
  • Proceedings of the 27th ACM international conference on Design of communication
  • Year:
  • 2009

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Abstract

The literature reports many efforts toward supporting video annotation. In this paper, we present a peer-to-peer model for the exchange of context information and user annotations over video. The Context-Aware Peer-to-Peer Architecture (CAPPA) exploits the automatic capture of the user-interaction with personal devices, employs ontologies to store context information, and uses the context information to organize users in P2P groups for the collaborative exchange of information. We present our proposed model by discussing a prototype system, called CAPPA Service (CAPPAS), which allows users to create and to join peer-to-peer groups using Web-based social communities. Using CAPPAS, users are able to create multimodal annotations while watching videos. The service deploys a capture mode which can be adapted according to the context information collected from the P2P network. CAPPAS customization features include the adaptation of its graphical interfaces according to context information, and the automatic suggestion of text completion during annotation.