On 10/02/2007, at 10:14 PM, Natalia Costas wrote: > > > Hi, > > We are collecting information regarding hardware improvements for > new rooms. I gathered some advices from our experience, like: > > - Include a small UPS > - Include a better graphis cards
Natalia, I'd suggest putting the graphics cards into a machine with 2 PCI- Express graphics slots. Then you can have 2 dual output graphics cards to provide the 4 outputs from the display machine - all running with the same (maximum) throughput and potential for hardware graphics acceleration (which will become more important as more DV/ HDV becomes used in the AG world). > - Maybe reduce from 4 huge servers.. only 2 (audio+video+control > and display on a different computer) its more convenient to control the audio from the display machine rather than the video capture machine i.e. display & audio on one machine, normal video capture on the other > - Provide a touch screen device for lecturers.. (not sure how do > that for collaborating groups)... that might be a tabletPC or a > mimio device. > - Maybe TFT/Plasma screens for smaller rooms > - Maybe mobile equipment for particular rooms > - ... > > I would like to know things you missed in your initial (or default > AG) desings or you installed and think they provided improved > usability or features that are interesting, or maybe improved now > obsolete AG features. Or new technologies that might be of interest. > > On the other side, I am interested about how to share high > definition contents with other rooms, maybe some of you already > have that kind of set up and could guide us. We are involved on an > AG design for medical meetings and we are working with them on > their needs and how to provide solutions to them. Compressed HDV directly from cameras has a latency of about half a second. That is acceptable for non-interactive sessions (and perhaps _some_ interactive sessions). We have recently developed a new version of vic with DV and HDV capture & display capability. The Linux version is working well and the Windows port is just about to begin. Uncompressed HDV would be ideal, but the bandwidth required is around 1 Gb/s - not a realistic proposition for most networks. Bandwidth of the compressed streams is around 30Mb/s, so you can have multiple HDV streams on a good network (if you can tolerate the latency). Also, the HD YUV capture cards cost thousands of dollars. chris Christoph Willing +61 7 3365 8350 QCIF Access Grid Manager University of Queensland
