renambot at cs.vu.nl
Fri Aug 30 07:31:07 CDT 2002
Interesting topic ! I'd would be interested in some discussion.
- 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
] -----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.
] 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...!!
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