Download APAN-2003

Broadcasting and High
Bandwidth Network
Applications – Pushing the
Technology
Michael Wellings
Director of Engineering
www.researchchannel.org
ResearchChannel
 Consortium of Institutes of Higher Education and
Research
 National Academies
 Corporations
 www.ResearchChannel.org
Participants
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Baylor College of Medicine
University of Chicago
CENIC
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Carnegie Mellon University
University of Colorado
Internet2
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Duke University
University of Hawaii
National Academies
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George Mason University
University of Houston
National Academy of Engineering
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Georgia Institute of Technology
University of Maryland-College Park
National Academy of Sciences
University of North Carolina
National Institutes of Health
University of Pennsylvania
National Institute of Standards and Technology
University of Southern California
National Sea Grant College Program
University of Texas -Austin
R1edu.org
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Johns Hopkins University
Massachusetts Institute of
Technology
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National University of Singapore University of Virginia
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Oregon Health and Science
University of Washington
Research Centers:
University
University of Wisconsin-Milwaukee
IBM Corporation
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Princeton University
Vanderbilt University
Sony Electronics Inc.
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Rice University
Virginia Tech
Vulcan
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Stanford University
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Tufts University
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University of Alaska-Fairbanks
Yale University
ResearchChannel Goals
– Create a recognized global media presence for
research activity
– Provide a high-quality and accessible resource for
research information
– Encourage collaborations and technology
experiments among ResearchChannel
participants to develop new methods of
distribution
Viewership
– 7 Million on Echostar’s DISH 500 Network
– 6.4 Million on Cable Systems in 19 States
– 35,000 requests for web pages, webcasts, and
on-demand files fulfilled per month
• Viewership from around the world
Topics:
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High-quality media using high speed networks
Content delivery applications
V.O.D. interface for HD, MPEG2@ML
Desktop HD client @ 19.2mbps MPEG2@HL
Applications for our Radio/TV Ops
DigitalWell Media library
“Convergence” and the future
High Quality Media delivery
using high-speed networks
• http://www.researchchannel.org/inside/pro
jects/
Network Engineering
• Jan Eveleth
• Manager, GigaPOP Services
• Pacific Northwest GigaPOP
Network Engineering
• Real-time applications
• High data rates
• Sensitivity to loss, packet re-ordering,
jitter
• Cross boundaries
Packetized SMPTE 292M @
1080/60i
• Raw HDTV/IP – single UDP flow of 1.5
Gbps
– Project of USC/ISI East, Tektronix, & UW, (DARPA support)
– 6 Jan 2002: Seattle to Washington DC via Abilene
• Single flow consumed 60% of backbone bandwidth
– 18 hours: no packets lost
– 15 resequencing episodes
– Experiment repeated Nov 2002 @ SC’02 UW Seattle to Denver
SONY HDCam/IP
• SDTI capture using Optibase VideoPump
and custom ResearchChannel software
• HDCam Encode and Decode
• Demonstrated to the Broadcast Industry at
NAB2000 in the SONY Booth
Application Centric QoS
• Classic Internet architecture - have
applications assume responsibility for
quality
• Applications should
– Utilize error correction techniques
– Adapt to changing network conditions
– Provide user-visible telemetry
• Fortunately, all of these are a natural fit for
streaming media…
Error Correction
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Should cope with intermittent problems
Forward Error Correction
Buffer and retransmit
Deal with packet re-ordering
Evaluate latency/buffering design points
ResearchChannel HD/IP
Futures
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FEC
Improved diagnostics
Low latency ( < .5 sec)
Multicast
Desktop client
VOD
Back end Engineering
• Jim Deroest
• Director of Streaming Media
Development
• Original focus broadcast-streaming integration.
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ResearchChannel, UWTV, KEXP
Automation: encode, ingest, metadata, schedule, deliver
Scalable standard def, high def, uncompressed streams
Support commodity bit rates and formats
• Focus expanded to include institutional collections
– High-quality and accessible resources to research
information.
– Educational outreach
– Interoperate with other digital repositories
• Why quality matters …
Webcast and Video On
Demand
• Hours Viewed Increases 200% since Jan 2002
• Breakout by Bandwidth
Average Viewing Time
• Duration longer for VOD, higher bandwidths
Backend Diagram
 Insert diagram image - mass store system
Application: Television
• ResearchChannel, UWTV
– Automated Encoding
• Dub time SONY MAV capture 50mbps i-frame MPEG2
4:2:2
• Transcode farm – Flipfactory, Virage
• 1300+ hrs of SD 5.6mbps MPEG2@ML
– Broadcast Scheduling Integration
• Protrack, DW metadata -> Dynamic web schedule
• Integrated with DW On-Demand library
– SD MPEG2@ML multicast
• International rebroadcast support
– http://www.researchchannel.org
Application: KEXP-FM
• AES Infrastructure
• Live Broadcast Stream
– Uncompressed 1.4mbps
– Commodity bit rates
• Archived Live Broadcast
– 2 weeks, all formats
• Real-time Broadcast Playlist, CDID
– Dynamic web update integrated with DJ console
– Archived with live broadcast
• http://kexp.org
Media Service Data Rates
• VOD
– MPEG2@ML 5.6mbps
– WM @ 56kbps, 256Kbps, 1300Kbps
• Video Streaming - WM
– 28.8 – 100kbps
– 200kbps
– 1300kbps
High-End Applications:
Technology Demonstrations
iGrid 2002 - Video Across the Atlantic
• International Partnerships
New Projects
– MPEG-2 MP@HL ATSC delivery
• Desktop client for VOD
– Prospects for Interactivity
– SONY HDCam on-demand
– SMPTE 259M/IP joint project with Internet2 –
announced today at Internet2 Spring Meeting
– Possible multicast applications@ high bit rates
– UW Medical Surgery Pavilion
– APAN 2003 – Busan, Korea
The End
• For more information:
– www.researchchannel.org
Or write
– [email protected]
– [email protected]