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„Uni-TV“ Distributed TV
Productions and Video-on-Demand
Services at Universities
May 24th, 2000 [email protected]
Outline
• introduction
• distributed production in studio quality
• distribution and access
• problems and experiences
• focus and future outlook
May 24th, 2000 [email protected]
Project Partners and Sponsor
• RRZE/University of Erlangen
• IRT/ Munich• BR• HFF• TUM• DFN
May 24th, 2000 [email protected]
Concept
• transmissions from the auditorium (Univ. Erlangen, Univ. Munich) to the IRT/Munich
• online editing at the studio/IRT according to the script provided by the HFF
• retransmission of the edited material to the auditorium for control and recording
• distribution over the internet/intranet
• offline editing for television broadcasting via satellite and cable
May 24th, 2000 [email protected]
Benefits
• reduced production costs
• material for universities / distant education
• promotional benefits for the universities
• educational television– Collegium Alexandrinum
May 24th, 2000 [email protected]
Production and Distribution
• equipment– video, audio,
editing
• network
• servers
• accessibility and statistics
May 24th, 2000 [email protected]
Videoproduction
• cameras– (semi-) professional
– general orientation
• codecs
• scanconverter for transparencies– alternating with
camera
• monitors for quality control
May 24th, 2000 [email protected]
Audioproduction
• wireless speaker microphones
• codecs– embedded audio
• audio for directing and monitoring
May 24th, 2000 [email protected]
Studio for editing at the IRT
• online editing (MPEG-2 4:2:2)
• offline editing w/trailer, headers
• possibility for live broadcasting with BR
May 24th, 2000 [email protected]
Network
• Gigabit Testbed South/Berlin– 3 x 2.5 Gbps ATM– 3 channels – 1 fiber pair
• University network in Erlangen
• city network (M‘net) in Munich
May 24th, 2000 [email protected]
Transmission Requirements
• cameras
– 3 x 50 Mbps CBR, VBRrt ATM
• camera for monitoring/directing
– 1 x 15 Mbps CBR, VBRrt ATM
• audio signals
May 24th, 2000 [email protected]
Distribution
• television (cable and satellite (Astra))– fixed 30-minute time slot on the educational
channel „BR-“ as part of the series „Alpha Campus“
• internet/intranet– individual download/streaming (MPEG-1,
MPEG-2 4:2:0)
– near-Video-On-Demand via IP/Mbone reservation (H.261)
May 24th, 2000 [email protected]
Bandwidth Requirements Distribution
• product after online-editing– 1 x 50 Mbps
• product over the internet/intranet– 15 Mbps MPEG-2 4:2:0 – 2 Mbps MPEG-1
• product Near-VoD via IP/Mbone– 1 Mbps H.261
May 24th, 2000 [email protected]
Server
• server capacity at the IRT for editing– 3 camera signals for editing
(MPEG-2 4:2:2) with audio signals (3 hrs)– 100 GigaByte per class
• server at the RRZE for Video-on-Demand – 1.2 GigaByte per class (MPEG-2 4:2:0
broadcasting format)– 400 MegaByte per class (MPEG-1)
May 24th, 2000 [email protected]
Statistics
• March 2000– 2939 hits– 2596 files– 669 pageviews– 704 sessions– 61436840 Kbytes
sent
May 24th, 2000 [email protected]
Problems and Solutions
• problems with equipment– codecs, camera settings, back-up team
• problems concerning the presentation– subject matters– speakers and their preferences– pointers
May 24th, 2000 [email protected]
Current Focus and Future Outlook
• improved quality / fine-tuning
• improved accessibility/distribution
• indirect camera remote control
• VBRrt ATM PVCs
• latency of codecs
• regular classes for credits
• questions from the audience
