On Aug 22, 2007, at 12:45 AM, James Richard Tyrer wrote:
http://www.videsignline.com/howto/showArticle.jhtml;
jsessionid=IIKPB2ECNEMEYQSNDLSCKHA?articleID=197700676
Very interesting idea. The obvious advantage of FireWire is guaranteed
bandwidth, which would be very nice, and I was not
aware that FW800 supports being run over CAT5e!
The only problem I see is that we won't support ethernet, something
that a lot of people will want. Solution: Have both FW800
and GBE on the board. People who care will use FireWire, and normal
customers who don't mind the occasional interruption
due to packet loss can use GBE ;-)
We should actually be able to integrate some sort of switch to have
them come out of the same CAT5e/RJ-45 port.
Just to get something started, I am probably going to work on laying
out a PCB (or at least a schematic) in the next few days.
Since there has not been any consensus about what chips we are going to
use and we should at least get started working,
I chose the "TI DSP + FPGA" model. I haven't decided which ones yet
(though right now it looks as if Spartan-3/DSP,
Cyclone III, or XP2 is the right family level for FPGAs, and the
TMS640C6412 DSP since it is 4000-4800 MACs for $40),
mostly because I will be attempting to find out as much as I can about
the processing power needed to decode H.264 in
order to make up my mind.
Meanwhile, I am sure somebody will come up with a good reason not to
use the DSP + FPGA approach and instead use
something else, but whatever -- might as well sound determined ;-)
Thoughts?
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