Proceedings of the 18th international workshop on Network and operating systems support for digital audio and video

It is our great pleasure to welcome you to the 19th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2009). Held in the historical town of Williamsburg, Virginia, this year's workshop continues its long tradition of being an active forum for presentation and discussion of new research ideas and results on hot topics in the area of systems support for multimedia. The main goal of the workshop is to accommodate timely exchange of research results and to foster lively, constructive discussions on potentially controversial concepts and solutions. For years, NOSSDAV has been recognized as a unique venue that attracts young and seasoned researchers and practitioners working on operating systems and networking support for emerging multimedia applications and services. The call for papers for NOSSDAV 2009 attracted 71 submissions. Each submission was carefully reviewed by at least three technical program committee members, with help of additional reviewers. After a rigorous review, discussion, and selection process, the program committee accepted 22 papers based on technical merit, interestingness, and discuss-ability at the workshop. The accepted papers cover a variety of emerging and established topics, including collaborative systems, IPTV, live media streaming, games, virtual environments, and Web 2.0 applications, touching on a wide range of issues such as security, user experience, traffic measurement and identification, power-awareness, and protocol design. The accepted papers are also highly international, with contributions from more than 10 countries across Asia, Europe, North America, and Oceania. This year we are honored to have Professor Henry Fuchs (UNC-Chapel Hill) as our Keynote Speaker. With his achievements, vision, and leadership in computer graphics and virtual reality, Professor Fuchs shares with us his technical insights and a fresh perspective of systems support for multimedia.