CSC - Scientific Computing Ltd. FUNET-TV Harri K. Salminen.

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Presentation transcript:

CSC - Scientific Computing Ltd. FUNET-TV Harri K. Salminen

CSC - Scientific Computing Ltd. Goals Easy broadcast and recording of lectures Multipoint videoconferencing Multimedialaboratory for live transmission, post-processing and research needs A versatile mediaserver: –H.261, MPEG-1, MPEG-2 … –Windows, Unix, MacOS… Experimenting with tomorrows “TV”

CSC - Scientific Computing Ltd. Operating environment Supercomputer center’s resources Universities have multimegabit access to the high speed FUNET network Modems and ISDN play only a minor role Realtime content: Audio, video, VR… Lectures, seminars, meetings, visualizations, documentaries… Collaboration with shared applications

CSC - Scientific Computing Ltd. Mediaserver Time shifting, multimedia on the web, media archive, technology experiments SGI Webforce Mediabase –MPEG-1, MPEG-2, H.263, RealVideo, RTSP –Origin 200, 512MB, 300+GB, ATM, Ethernets –Management via web or unix shell –Scales up to terabytes and thousands of users WrtpVoD prototype for RTP recordings

CSC - Scientific Computing Ltd. FUNET-TV laboratory Realtime conversion, editing, research and testing facilities for audio and video 270Mbit/s SDI digital video connections Converters, TBCs etc. for analog video Digital audio mixer combines and processes all audio signals Realtime codecs from Realvideo and RTP/H.261 up to MPEG-2 at 50Mbit/s

CSC - Scientific Computing Ltd. Sample projects Web University: Distance education pilotDistance education pilot –Mainly finnish students and researchers –MBONE tools, WrtpVod, VRVS, webVRVS A synthetic compression test video A virtual Studia Generalia seminar series Live conference transmissions Archiving of art and culture History of the Internet

CSC - Scientific Computing Ltd. Conclusions: Audio G.7xx is still a safe choice for speech For modem users: GSM or RealAudio MPEG or AC-2 are best suited for multichannel high quality audio needs Professional use of microphones Good echo cancellation for two way audio Sound check, monitoring and processing Audio may be partly synthetic in the future

CSC - Scientific Computing Ltd. Conclusions: Video Television quality MPEG –MPEG-1 is good enough for many uses –MPEG-2 is the basis of digital television –MPEG-4 is emerging for future virtual worlds H.26x videoconferencing –H.261 has worked well but H.263 is the future RealVideo is very common but proprietary High quality video material pays off

CSC - Scientific Computing Ltd. About the future Differentiated services should appear to support real-time QoS needs in the Internet Anyone can be a real-time content producer MPEG-2 will spread to every home HDTV may take much more time and money MPEG-4, VRML and computer games will make realtime virtual worlds more common 2-D mediawall or 3-D VR helmet? Good question. Next question please!

CSC - Scientific Computing Ltd. For more information: funet.fi GSM: