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<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>I’ve
had several requests for more information on our progress toward creating an AG
node that runs on a single computer running Windows XP. I thought
I’d use this opportunity to address the discussion list and hit everyone
at once.</span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>We’re
making good headway working on an optimized RTP conferencing stack for Windows
XP. We’re now streaming across the Internet2 from multiple sites sending
320x240 and 640x480 MJPEG compressed video streams at 15 fps and uncompressed
CD quality audio streams. We have the latency of both audio and video
down to the 100-200 ms range. We are using a simple Forward Error
Correction algorithm to enable consistent high-quality conferencing in
real-world Internet2 environments, not just the test lab.</span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>We’re
currently encoding/sending two 320x240 streams and a 640x480 stream and
decoding a 640x480 stream and three 320x240 streams on one box using high
quality Firewire cameras.</span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>We’re
going to be demonstrating this system in a distributed classroom scenario at
the Microsoft Research Faculty Summit in </span></font><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>Redmond</span></font><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'> next Tuesday.
I’ll also be talking about our work-to-date and some of the challenges
we’ve found and overcome at the upcoming <a
href="http://www-fp.mcs.anl.gov/fl/wace/"><font color=black><span
style='color:black'>WACE conference</span></font></a> (http://www-fp.mcs.anl.gov/fl/wace/)
(co-located with HPDC-10). We’re on target to release a beta
version of this software around the December timeframe. </span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>After
things calm down a bit, I’ll be updating our <a
href="http://portal.learningwebservices.com/DISC"><font color=black><span
style='color:black'>Distributed Classroom project homepage</span></font></a> (<a
href="http://portal.learningwebservices.com/DISC/"><font color=black><span
style='color:black'>http://portal.learningwebservices.com/DISC/</span></font></a>)
with additional details on what we’ve accomplished to date including
hardware specifics, performance measurements and more details on our
development directions. This won’t happen until late next week at
the earliest as my team is heads down focusing on the faculty summit right now.</span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal style='margin-left:57.0pt;text-indent:-.25in'><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>-</span></font><font size=1 color=black><span style='font-size:
7.0pt;color:black'> </span></font><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>jcb</span></font></p>
<p class=MsoNormal style='margin-left:39.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font></p>
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