Transcript ppt 3.0MB - Star Tap

ResearchChannel:
Think Forward. Think Success.
Michael Wellings, Director, Engineering
San Diego
Topics of Discussion
HD Network Update
• iHDTV Applications
Current state of iHDTV system
Planned Software Enhancements
• Demos
System design
Audio
Video
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iHDTV Explained
• iHDTV Explained
• iHD1500
• iHD270
• HD to the Desktop
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iHDTV Explained
• iHD1500
• Uncompressed SMPTE 292M 4:2:2
• Data rate total approx 1.5 gbps
• Requires:
high-end HD capture cards
PCI Express PCs
Windows XP (at the current time)
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iHDTV Explained
• iHD270 (first introduced aug 99)
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Sony HDCamtm compression
SDTI data format 270mbps
AJA Xena I/O
Requires:
AJA Xena-HD capture cards
Dual Processor P4
Windows XP (at the current time)
Sony HDCam Hardware encoder/decoder
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Scheduled Demos
• Sept 2005 - iGrid San Diego
• Enhanced HD interactive - USA118: Global N-Way Uncompressed
Interactive Conferencing
• Underwater research using HD from SS Thompson – USA119:
20,000 Terabits Under the Sea
• Nov 2005 - SC05 Seattle
• Enhanced HD Interactive Conferencing/HD Storage and capture
using SRB (Storage Resource Broker)
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iGRID 2005 San Diego
• USA118: Global N-Way Interactive HD
• USA119: 20,000 Terabits under the sea
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iGRID 05 – USA118
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Sept 2005 - iGrid San Diego
• Enhanced HD interactive - USA118: Global NWay Uncompressed Interactive Conferencing
• Remote sites:
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2.
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6.
University of Washington - Seattle
WIDE - Tokyo
University of Wisconsin - Madison
University of Michigan
SURFnet - Amsterdam
AARnet - Goldcoast
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iGRID 05 – USA118
• Sept 2005 - iGrid San Diego
• Remote site equipment:
2 RX iHD1500 Hosts (multicast from iGRID)
1 TX iHD1500 Client
• Central site equipment:
6 RX iHD1500 Clients
2 TX iHD1500 Hosts (Multicast)
Evertz HD Video Tile Generator
Multichannel mix-minus audio system
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iGRID 05 – USA118
• iHD500 – first demonstrated at SC 04
• Real-time HD communication: Australia and
Seattle > Pittsburgh @ 1.5gbps each direction
• Relatively High latency (1500ms RT)
500ms hardware/software one-way
250ms network delay one-way
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iGRID USA 118 Network
Diagram
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iGRID USA 118
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iGRID USA 118
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iGRID 05 – USA119
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Sept 2005 - iGrid San Diego
• First ever live HD/ip from a ship at sea to
viewers on shore
• Ku-Band equipment upgrade to SeaTel antenna
• Careful RF engineering to design satellite LinkBudget
• Real-time MPEG-2 MP@HL encoding
• Ip gateway
• Satellite modem 20mbps
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iGRID USA 119
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iGRID USA 119 Network
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Software Challenges
• iHD1500 Enhancements:
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tile display generated in software
Audio mixing in software
Audio mix-minus in software
Video switching in software
Possible Linux implementation
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iHD-X: Open Source
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Open Source
• First quarter 2006
• Looking at various forms of
open source
• Call for participants
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HD Projects
• Videoconferencing in HD @1.5mbps – iHD1500
• Reduced latency using new hardware
• Blackmagic DecLink HD plus
• AJA Video XENA-HS
• Custom boards
• Possible hardware development and collaboration with RC
Australian partners CSIRO and Intel
• HDV – requires some explanation
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High Definition Video to the
Desktop
• FORMATS
• MPEG2 MP@HL
• PLAYERS
• WM9-HD@720p
• VLC (subject to license
issues)
• WM9/10
• REAL10
• H.264, ACV, MPEG-4
• RealPlayer
• QuickTime
• HDV
• VLC
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iHD1500 application
• SMPTE 292M/ip
• 1.5gbps
• 1080-60i HD video with multiplexed audio
• ResearchChannel partner Intel PCE-Express 3.4GHz Xeon
platforms
• ResearchChannel partner AJA Video Systems supplied initial
round of Xena-HD capture boards
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iHD1500 application
Latency about 4 frames end to end plus
network delay
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4 frames=133ms or ~ 1/7 sec
Network delay Australia>Philadelphia ~ 250ms
Satellite latency about 250ms per hop
H.323 devices about 250ms plus network delay
No significant delay in video equipment
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iHD1500 Development
The Future
Software tile display
software audio switching/mixing
software video switching
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For More Information
• www.researchchannel.org
• inquires: [email protected]
Michael Wellings
Director, Engineering
[email protected]
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