Performing Arts Advisory

["Feghali, Jose" <>]

I have now uploaded some results and comments on experiments with HD webcams and ConferenceXP to the CXP wiki. Here is the link:

 

http://cct.cs.washington.edu/project-wiki/index.php/HD_video_integration#Experiments_with_HD_Webcams

 

It appears that some configurations of “professional” HD cards might also work in HD, using intermediary compression and high-power CPUs. I am experimenting with VC-1 and MJPEG compression using Blackmagic HD-SDI gear and will report back on the wiki with the results. So far, latency hasn’t been as bad as with HDV, but not quite as good as I was hoping for.

 

Happy New Year, everyone!

 

José Feghali

 

From: Feghali, Jose
Sent: Friday, December 17, 2010 10:00 AM
To: Research Channel Working Group;
Subject: ConferenceXP in HD

 

In case there is any interest, wanted to let you know that I figured out how to use some of the  “HD” type Webcams with ConferenceXP. Taking the new Logitech C910 as an example, this is what I have gotten so far:

 

Max resolution for real-time VC:

1280x720@30fps

1920x1080@15fps

 

Bandwidth:

Between ~20-40 Mbps (more testing is need to figure out the limits)

 

Latency:

As good/better than uncompressed DV video

 

If anyone is interested in trying this out, let me know. I am trying to put together a list of cameras that work in this mode – so far, I have the Logitech C910 (their other HD webcams work the same way) and the Microsoft Lifecam Cinema.

 

Happy Holidays, everyone!

 

José