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AVSTP2P Overview

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  • 1. ACM Workshop on Advanced Video Streaming Techniques for Peer-to-Peer Networks and Social Networking Gabriella Olmo Politecnico di Torino C.so Duca degli Abruzzi, 24 10129 Torino, Italy +39(0)11 564 4094 gabriella.olmo@polito.it Christian Timmerer Klagenfurt University Universitätstraße 65-67 A-9020 Klagenfurt +43(0)463 2700 3621 christian.timmerer@itec.uni- klu.ac.at Pascal Frossard EPFL FSTI-IEL-LTS4 Station 11 CH-1015 Lausanne +41(0)21 693 5655 pascal.frossard@epfl.ch Keith Mitchell Lancaster University InfoLab21 South Drive Lancaster LA1 4WA, UK +44 (0)1524 510110 k.mitchell@lancaster.ac.uk ABSTRACT This paper provides a summary and overview of the ACM workshop on advanced video streaming techniques for peer-to- peer networks and social networking. Categories and Subject Descriptors H.0 [Information Systems]: General. General Terms Algorithms, Measurement, Performance, Design, Experimentation, Human Factors, Standardization. Keywords Video Streaming, Peer-to-Peer, Social Networking. 1. INTRODUCTION Peer-to-peer (P2P) is a promising technology for video streaming, and offers advantages in terms of robustness, re-configurability and scalability. From the point of view of the broadcaster, the P2P approach permits to serve a larger audience without the need of proportionally increased resources. From a users’ point of view, P2P should allow each user to experience high quality video in a cost effective fashion. Moreover, users themselves can act as prosumers by distributing their own content within social networks enabling heterogeneous users to distribute real time, TV-quality video streaming on P2P overlays. In this context, social networks and social services are emerging as a potential new driver for content delivery networks. Specifically, social networks potentially provide a new level of understanding and knowledge related to the interaction between people within a virtual space. Many emerging multimedia based services and applications have started to exploit the ‘social graph’ in new ways for establishing a basis for social recommendations, filtering etc.). As yet, one unexplored area of research relates to the exploiting the social graph for informing adaptive behaviour in P2P-based multimedia systems. On the other hand, the P2P video technology is still challenging, due to the need of reducing start-time and churn-induced instability, to the asymmetry of residential broadband connections, and to high packet loss rates due to router congestion and transmission errors on the physical network, node departure from the P2P overlay, strict timing out due to real time visualization. The lack of guarantee about the actual delivery of the data may cause drops in the reproduction quality and service outages. Moreover, we expect for the near future an increasing demand for mobility and ubiquitous access to the Internet. Users will join the service using terminals with different resolutions and bandwidth, and diverse, possibly wireless access technologies. The use of low power terminals pose stringent challenges also in terms of computational complexity of the algorithms to be run for data coding. In this scenario specific video coding strategies could play an important role. At present the coding algorithms used in the state of the art video P2P networks are based on solutions optimized for different application scenarios. This could be a limit for realizing very efficient P2P video streaming applications. 2. TOPICS OF INTEREST This workshop [1] solicited novel contributions and breaking results on all aspects of P2P-based video coding, streaming, and content distribution which is informed by social networks. In particular, workshop papers should describe algorithms, issues and experiences related to P2P video streaming and social networks taking into account recent advances on multimedia coding such as scalability, resilience, cross layer optimization, network coding as well as its distribution and interaction. We are particularly interested in (but not limited to) areas such as: — Innovative P2P-based video streaming solutions; — P2P-based social media content distribution networks; — Advanced video coding techniques for real-time P2P applications: layered/scalable video coding, multiple description coding, distributed source coding; — Identification and design of proper metrics for performance evaluation and monitoring including Quality of Experience; — Content and context analysis and modelling for P2P-based social media distribution; — Filtering and recommendation systems; — Error-resilience tools for peer-to-peer multimedia services; Copyright is held by the author/owner(s). MM’10, October 25–29, 2010, Firenze, Italy. ACM 978-1-60558-933-6/10/10.
  • 2. — Rate control and bandwidth adaptation for both single streams and multiple stream multiplexing; — Cross layer optimization issues; — Protocols for peer-to-peer multimedia services; — P2P streaming prototype implementation for both live and on-demand streaming; — Advertisement, payment, and cashing systems; — Applications, standards, and practical deployments; 3. SUMMARY OF SUBMISSIONS The call for papers attracted 30 submissions (two redirected from the main conference) from Australia, Asia, Canada, Europe, and the United States of America. The program committee accepted 15 papers covering a variety of topics, all in the context of P2P: — Multi-source video distribution; — Modeling end-to-end delay; — Piece-picking for layered/scalable content; — Prefetching and upload strategies; — QoE improvements for multiple description video transmission; — Cache optimization; — Network coding improving packet jitter; — Analytical approach to model adaptive video streaming; — Access control to BitTorrent swarms; — Group communication with layer-aware FEC; — Streaming with LT codes; — Design and evaluation of an optimized overlay topology; — APIs and library; Furthermore, George Wright (Head of Prototyping, BBC Research and Development) provides an invited talk entitled “Audio/visual content and metadata delivered over the open Internet using P2P-Next: some experiences from a broadcaster's perspective”. As workshop chairs, we would like to thank all people who have contributed to the success of this workshop: the authors, the invited speaker, the program committee members and all reviewers, and the members of the organizing committee of ACM Multimedia 2010. The support of the workshop sponsors is also greatly acknowledged, in particular RADVISION (http://www.radvision.com/) for sponsoring the best paper award. We sincerely hope that the carefully crafted technical program we have arranged for, the scientific discussions that the workshop will hopefully stimulate, and your additional activities in Florence, will make your participation worthwhile and a memorable experience. 4. ACKNOWLEDGMENTS The workshop is partly sponsored by the project “ARACHNE: Advanced video streaming techniques for peer-to-peer networks,” funded by the Italian Ministry for Education and Research (http://www.diegm.uniud.it/arachne), and partly by the EC-funded “P2P-Next” project (http://www.p2p-next.org). 5. REFERENCES [1] http://www.p2pstreaming.eu/ (last access: July 2010).

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