From: Angus Dorbie (dorbie++at++sgi.com)
Date: 01/25/2000 12:30:32
I haven't used a TBC for this (just for cleaning up bad sync
information) but given the use you describe I expect that the latency
would vary over time depending on your luck.
Can't you genlock the ONYX to the video output from robotic vision
system (perhaps with an appropriate phase shift)? It seems that this
would be a much better method of aligning the two signals and wouldn't
introduce additional latency. Any latency would then be due transport
through the vision system itself and would equal the phase shift applied
to the genlock. You could then auction your TBC on ebay.
Cheers,ANgus.
Francis Govers III wrote:
>
> Fellow Graphics Nuts:
>
> I have an issue here at NASA with our Onyx2. We have to use a TBC (Time
> Base Corrector) to re-synch our video NTSC output to a "robotic vision
> system" which is used on the Space Shuttle, and which we stimulate in the
> Shuttle Mission Simulator and Space Station Training Facility--in other
> words we use our image generator to create a NTSC video which stimulates the
> real Robotic Vision System.
>
> We have to use a TBC in order to get these two devices to synch up and
> provide overlays out to the crew stations. The customer is worried that the
> TBC is introducing another frame of latency into our system. I am not
> familiar enough with the functioning of a TBC to know if this is true or
> not.
>
> Does anyone out there have some experience with using TBC's to synch up
> Onyx2's, and do they insert another frame of latency into our image
> generator?
>
> THANK YOU ALL VERY MUCH!
>
> Francis X. Govers III, Systems Engineer
> SGI - NASA/Johnson Space Center Office.
> 18333 Egret Bay Blvd. Ste.270 Houston TX 77058
> Phone: 281-493-8366 Pager: 1-888-983-0380
> Email: fxgovers++at++houst.sgi.com Pager Email:fxgovers_p++at++pager.sgi.com
> <<Francis X. Govers. III (E-mail).vcf>>
--
"It takes a vision to beat a vision."
-Thomas Sowell
This archive was generated by hypermail 2b29 : Tue Jan 25 2000 - 12:30:38 PST