Hi Daniel: Yes I have heard of this work at LSU from John and via the CESNET folks (Petr Holub, et al). Is there a website or any other reference to it? My understanding is that a class is being taught between 3 different locations?
Yes, the Centaurus cards are pricey! but a new CentaurusII card is available now at a lower cost (almost half). This card is compatible with the SDK we have been using and comes in either PCIe and PCIX. Ladan On Mar 9, 2007, at 1:28 PM, Daniel Eiland wrote: > Hi, > > John already knows of this, but just to mention it. We are > currently using the Centaurus card to send and receive HD > uncompressed video over Ultragrid. They work well but are nice and > pricey. > > -Daniel. > > Ladan Gharai wrote: > >> Hi John, >> >> On Mar 9, 2007, at 10:07 AM, John I Quebedeaux Jr wrote: >> >> >>> Well, that camera does specify the type of output that Ultragrid >>> works with on that HD-SDI connection (SMPTE-292M output)... i >>> suspect then the details get down to the hardware on the computer >>> side and networking, etc. It has other outputs, but not IEE1394 >>> (firewire) which is where most HD cameras do onboard mpeg2 >>> encoding/lag that Brian spoke of. I'm... guessing? that HD-SDI is >>> uncompressed. >>> >> >> correct, HD-SDI is the uncompressed HDTV format. And there are a >> number of HDTV capture cards on the market with HD-SDI input/ >> output. The Centaurus card from www.dvs.de is the capture card >> the UltraGrid system currently supports. >> >> HDTV cameras with IEEE1394 output, provide an MPEG2 compressed >> HDTV stream. >> >> HDMI capture card/cameras becoming available is very interesting >> and I'd be very interested to see how they compare in performance >> with HD-SDI systems. >> >> >>> >>> My concerns in meetings get back to having an "environment" of >>> human presence @ multiple sites that can interface naturally - >>> which includes video sources from the front and back of the room >>> (what I call "environmental feedback") - typically called the >>> "presenter camera" in the back of an AG room. I can possibly see >>> having an HD camera in the front and back of the room to do >>> this... then maybe another for... i've always felt you can't have >>> enough cameras! >>> >>> -John Q. >>> >>> --John I. Quebedeaux, Jr.; Louisiana State University >>> Computer Manager LBRN; 131 Life Sciences Bldg. >>> e-mail: jo...@lsu.edu; web: http://lbrn.lsu.edu >>> phone: 225-578-0062 / fax: 225-578-2597 >>> >>> >>> On Mar 8, 2007, at 4:11 PM, Colin Perkins wrote: >>> >>> >>>> We've done some work with uncompressed HD conferencing which >>>> might be relevant: http://ultragrid.east.isi.edu/ >>>> Colin >>>> >>>> On 8 Mar 2007, at 21:14, Brian Corrie wrote: >>>> >>>>> Hi John, >>>>> >>>>> Interesting... Does anyone know anything about SDI HD capture >>>>> cards. We are looking at HD as well (but no direct experience >>>>> yet) and the trick seems to be to get video off of the camera >>>>> avoiding the onboard encoding of the video, which often adds >>>>> significant latency (which is not good for AG of course). Does >>>>> anyone know if the SDI out of this camera either has onboard >>>>> hardware encoding (so low latency) and/or whether the SDI out >>>>> is uncompressed video (I don't know anything about SDI other >>>>> than that it is a broadcast oriented standard). Since this is a >>>>> video conferencing camera one would assume the SDI is raw video >>>>> (it looks like it base on my reading). So once one gets it out >>>>> of the camera how does one get it to the computer... There must >>>>> be an HD SDI capture card available. >>>>> >>>>> We are looking at the Sony HDR-HC7 prosumer HD camcorder as a >>>>> possibility. They aren't available yet, but any day now... They >>>>> have HDMI out, which is uncompressed video. There is a HDMI >>>>> capture card that can handle raw uncompressed HD video at 1080i >>>>> available from Black Magic that looks promising... The camera >>>>> is around $1500 and the card is $250. >>>>> >>>>> http://www.blackmagic-design.com/products/intensity/ >>>>> >>>>> We are going to be purchasing this pair as soon as the camera >>>>> is available, so I will let everyone know how this works out. >>>>> If it does work its a pretty inexpensive HD solution! >>>>> >>>>> Cheers, >>>>> >>>>> Brian >>>>> >>>>> >>>>> John I Quebedeaux Jr wrote: >>>>> >>>>>> Someone asked me about this camera for HD use on the AG: >>>>>> http://www.picturephone.com/products/sony_evi_hd1.htm >>>>>> Anyone have any experience with it? I'm wondering if it was >>>>>> used, how to best "capture" it into a system for use on the >>>>>> AG... interest in using HD is high here. I'm more concerned >>>>>> about logistical issues with high resolution images on >>>>>> displays that don't have that much "resolution" space - >>>>>> particularly if several sites are involved. >>>>>> -John Q. >>>>>> --John I. Quebedeaux, Jr.; Louisiana State University >>>>>> Computer Manager LBRN; 131 Life Sciences Bldg. >>>>>> e-mail: jo...@lsu.edu; web: http://lbrn.lsu.edu >>>>>> phone: 225-578-0062 / fax: 225-578-2597 >>>>>> >>>>> >>>>> >>>> >>>> >>>> >>>> --Colin Perkins >>>> http://csperkins.org/ >>>> >>>> >>>> >>> >>> >> >> > > -- > > Best Regards - > > Daniel L. Eiland > > Audio/Video Support > > The Center for Computation and Technology > > Louisiana State University > > deila...@cct.lsu.edu > > IM: cctdeilands >
