The Chorus WP2 is dedicated to “Multi-disciplinary Analysis and Roadmap”. The work is organized within thematic working groups dedicated to technical and non technical issues related to multimedia search engines. We list below the WGs topics and leaders:

• WG1: Audio-visual content indexing and retrieval technologies - Nicu Sebe (UvA) and Joachim Kohler (FhG)
• WG2: Evaluation, benchmarking and standards - Nozha Boujemaa and Joost Geurts (INRIA)
• WG3: Mobility, P2P, Heterogeneity - Jean-Yves le Moine (JCP)
• WG4: Socio-economic and legal aspects - Ramon Campano and Boris Rotenberg (IPTS)
• WG5: User interaction and group behavior Jussi Karlgren Jussi Karlgren and Åsa Rudstrom (SICS)
• WG6: Use-Cases and New services – Yiannis Kompatsiaris, Paul King (CERTH-ITI) and Christoph Dosch, Robert Ortgies (IRT)

The objective of this first deliverable is to establish the State of the Art regarding the critical issues identified through the WGs. We target to have a better view on the ongoing efforts mainly in the call6 European projects and (when possible) within the national initiatives. This information is needed before going a head in the Chorus roadmap activity and production. It is indeed necessary to have the clearest picture of the existing know-how and the existing problems as well to identify the bottlenecks. This first year effort will allow Chorus partners making the gap analysis between the expected new services and the necessary technological and non technological (socio-economic and legal aspects) evolution or mutation to make it possible. Of course, for the new services prospective, the WP2 will benefit from the feedback and the input of the Think-Tank participants and meeting (WP3 activity).

This document is organized as follows: In section 2 we set the scene of “multimedia search engines”, which includes the users point of view, role and interaction (based on input from WG5), and existing uses-cases and services (input from WG6). In section 3, the state of the art from a technologinal point of view is produced inlcuding existing efforts within EC projects and NI1 (input from WG1). Section 4 is dedicated to benchmarking and evaluation issues (input from WG2). In section 5, P2P and mobile search are investigated (input from WG3). Section 6 is dedicated to economical and social aspects of search and section 7 is targeting legal aspects. Both of these latter sections represent the input from WG4.