[AG-TECH] echo-cancellation on the cheap?

Brian Gleason bgleason at insors.com
Fri Feb 1 10:37:33 CST 2002

Yes inSORS currently is working with and deploying nodes ranging from full
conference rooms (sourced, staged, installed and supported)down to a
laptop/desktop node that works nicely. Distributed workers could join grid
sesions from remote facilities quite easily and quite cheaply.  What we call
a "grid station" is a one server, one projector node that works well in a
small area.  Our stantdard two server node uses up to four projectors.
Flexibility is key, every case seems to be different from the last.


Brian Gleason
inSORS 312-786-9169

-----Original Message-----
From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov]On
Behalf Of Bob Riddle
Sent: Friday, February 01, 2002 9:34 AM
To: ag-tech at mcs.anl.gov
Subject: Re: [AG-TECH] echo-cancellation on the cheap?

I'm not so sure that such a "small version" is too far out of that
$10K-20K range given the faster hardware & the work done by Insors &
being done by Microsoft to reduce the number of machines required to
support the AG software.

One could speculate that you might be able to run all necessary
processes on one computer (say a fast SMP) using table top
echo-cancellation mics (no Gentner need) and inexpensive projectors
(don't need 2000 lumens for  a conference room) .... I think you're
close to that dollar amount.

I've wondered if you could point multiple vrm/arm-eventlistener's to the
same DRM on the AG display machine.  We actually use some cheap baluns
to sometimes move our video signals through cat5 cable - I could image
having 4 different offices each having a "camera" and a RAT
participating in the conference .... I realize this abuses the notion of
sharing "meeting rooms" but I think it might help drive devlopment
toward more affodable nodes.  I also would like to have every meeting
room so equipped.

Have you tried using the VRVS AG support for receiving an AG seminar of

David E. Bernholdt wrote:

>While Gurcharan raises a valid issue, from my point of view it is a
>matter of "ease" of deployment.
>We have a single AG node at ORNL right now, and for a combination of
>practical and political reasons, its located 10 min walk from my
>office (even though I built it), and at least that far from the
>majority of prospective users.  That means usage of the AG node
>requires conscious intent.
>I'd like to be able to have an AG in every conference room in our
>Division, and looking further forward, I'd even like to have "personal
>AG" capabilities in each office -- maybe not the full AG, but enough
>to have reasonable meetings with 1-2 people at each of a couple sites,
>or to receive an AG-cast seminar.  I think this level of accessibility
>to the facilities would do a lot to promote the Access Grid.
>So if each node costs $70k, it is a lot harder to get people to spring
>for lots of them.  I don't know exactly where the thresholds are (and
>they'll vary by institution), but I would guess that if you could do a
>small conference room AG node for say $10-20k, people would happily do
>it.  And say at $5k, a personal AG node in every office is not
>Cost is not the only thing inhibiting wider deployment, but it is a
>significant one for most organizations.
>David E. Bernholdt                   |   Email: bernholdtde at ornl.gov
>Oak Ridge National Laboratory        |   Phone: +1 (865) 574 3147
>http://www.csm.ornl.gov/~bernhold/   |   Fax:   +1 (865) 574 0680

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