„Uni-TV“ Distributed TV Productions and Video-on-Demand Services at Universities.

„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]

Distribution and Access

• www.uni-tv.net

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