[AG-TECH] What makes the AG different and that other H.323 world...
John I Quebedeaux Jr
johnq at lsu.edu
Mon Aug 9 13:07:45 CDT 2004
Hi friendly AG folks! (again)
The existing video conference system in place is similar enough
(compressed video and H.323 is what I hear over and over again) that
they're saying "what's different about using the Access Grid instead."
I think the AG is experience is overwelmingly different but it's not as
polished as the H.323 systems I've been shown. The fact that the AG
doesn't utilize MCU's is another and I can "spread out" the
participants over many screens for a much better experience is another.
I *believe* the audio experience is different, better? I haven't
participated in one of their events just yet. I'm, unfortunately, not
someone familiar with the other side of this technology - just the AG
technology. They "call" people on this system (point to point and
multipoint) and content where they can have a presentation and people
on the screen. From what they described, they can have MANY sites on at
once - (MCU's and the like). They're typically with two cameras (3 if a
document camera) and already have the capability of sharing
presentations, etc. In the AG's case, it seems that seeing is believing
because trying to describe the system to someone who uses the other
system doesn't "see" there is a difference in the AG.
Now, one immediate difference is that they are not "always on" - like
we would have in the AG. There is no "virtual venue" that they all surf
through to "go to" someone elses room. Bandwidth utilization is higher
on the AG. They tell me the video quality is the same as H261. The one
audio conference I heard had drop outs, etc, but was told that was NOT
typical (it was an I1 connection, not via I2).
I'm bringing this up for discussion, I might have missed out on it
What I'm being asked now is if our existing node can also be used in
H.323 conferencing. The few times I've collaborated with someone on
H.323 via VRVS was a mixed bag. One site knew what it was doing and we
didn't have a problem from them (I had local network enforcement
issues, but that's been long resolved now). The others all had issues
or complained they could only pull up one video at a time, etc. The
audio was lousy, etc.
If I were to run H.323 parallel (utilize my existing
camaeras/audio/etc. for separate meetings at least) where should I look
for the software involved? I would think I have already all the
hardware I need. I know groups have been working on a bridge.... where
are those along the way? I'm not totally sure what I would need to do
to tie in.
Thanks for the ears,
John I. Quebedeaux, Jr.
Louisiana State University
Computer Manager / LBRN & CCT / 131 Life Sciences Bldg. & 339 Johnston
e-mail: johnq at lsu.edu or johnq at cct.lsu.edu / web: http://lbrn.lsu.edu &
phone: 225-578-0062 / fax: 225-578-2597
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