[AG-TECH] HDAG

[Luc Renambot]

Interesting topic ! I'd would be interested in some discussion.

Few thoughts:
  - few people seems to use RTPtv (over internet2 I think)
     Hardware + Software solution, integrated in OM vic,
     for full D1 over IP.
  - More and more video players start support some form 
    of RTP (Mplayer, VLC from videolan). They also use
    "modern" codecs (divx, mpeg4,...), and are open-source.
  - How to do 3D graphics: 3D api or pixels/video streaming
  - ...

Luc.

] -----Original Message-----
] From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov]On
] Behalf Of Osland, CD (Chris) 
] Sent: Friday, August 30, 2002 14:06
] To: 'Sascha Ignjatovic'; ag-tech at mcs.anl.gov
] Subject: RE: [AG-TECH] HDAG
] 
] 
] I've just had a long chat, by phone, with Sascha.  His interest
] is, as he says, mainly in getting high quality stored media such
] as DVD quality video over the Internet, but is also interested
] in aspects of this that relate to AG.  He is hoping to get an AG
] built at his institute.
] 
] It appears to me that a number of requirements are covered by the
] term 'High Definition Access Grid':
] 
] 	for camera sources or external analogue sources ...
] 		better than CIF image compression (e.g. full PAL or NTSC
] 		rather than sampled down to half in X and half in Y)
] 
] 		higher frame rates at CIF and better resolution (e.g. up
] 		to what would be needed to lip read)
] 
] 		capture of resolutions higher than PAL/NTSC (e.g. using
] 		the card mentioned at the AG Retreat - I'll look at the
] 		CD-ROM of the proceedings to get more details)
] 
] 	for internal digital sources (e.g. computer application) ...
] 		higher bandwidth allowing things like VNC to work
] 		closer to real-time while still loss-less
] 
] 		better ability to control trade-off between spatial
] 		resolution (compression) and frame rate in things like VNC
] 
] 	for external digital sources (e.g. DVD)
] 		mechanisms that make it worthwhile having such sources,
] 		i.e. that provide better results at remote sites than
] 		the same sources captured and relayed as analogue signals
] 
] 		multi-channel sound
] 
] Some of these may already be available in VIC, RAT and VNC but do not
] appear to be used by the AG community.  In at least one case while
] we were testing with Belfast, they switched VIC to a higher
] (spatial) resolution on the fly and every connected site's Display
] system crashed instantly!
] 
] If there are others who would (a) like to experiment with the
] existing tools to see what already works, (b) continue airing
] this topic in ag-tech, and (c) maybe occasionally meet over the
] AG to discuss ways forward, that would be good.
] 
] Cheers
] 
] Chris Osland
] 
] ____________________________________________________________________
] Chris Osland                         Office tel: +44 (0) 1235 446565
] Digital Media and Access Grid      Medialab tel: +44 (0) 1235 446459
] BIT Department             Access Grid room tel: +44 (0) 1235 445666
] e-mail:   C.D.Osland at rl.ac.uk               Fax: +44 (0) 1235 445597
] 
] CLRC Rutherford Appleton Laboratory (Bldg. R18)
] Chilton, DIDCOT, Oxon OX11 0QX, UK
] 
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] 
] 
] 
] -----Original Message-----
] From: Sascha Ignjatovic [mailto:sascha at chello.at]
] Sent: 12 August 2002 11:45
] To: ag-tech at mcs.anl.gov
] Subject: [AG-TECH] HDAG
] 
] 
] hi my name is sascha from vienna austria..
] 
] i am very interested in access grid and starting in september
] we will try to build one at the technical university of vienna
] 
] thank you all for your work in developing and aplying this
] cool and future technologie...
] 
] i am not a technical person as i am more  into aplications..
] 
] so hier i have a question...
] 
] john shalf from lbl told me that there is already the
] "next big thing" the
] 
] HIGH DEFINITION ACCESS GRID
] 
] i wrote to rick stevens got not a replay so far..
] 
] becouse i am little inpatient :-) now i am humbly asking the list..
] 
] if there is any information already available on the HDAG
] i would apreciate it very much...!!
] 
] thanks
] sascha
] 
]