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Posted by Jona Vark on 10/06/10 11:28
"AnthonyR" <nomail@nospam.com> wrote in message
news:dVz%e.4930$wf6.927620@twister.nyc.rr.com...
>
> "Jona Vark" <noemail@all.com> wrote in message
> news:SDl%e.2114$rl1.1263@newssvr27.news.prodigy.net...
> >
> > "Tony" <trusso11783@yahoo.com> wrote in message
> > news:54rmj1de2ua906t2g92vg3rgej1v9t3ri8@4ax.com...
> >> On Mon, 19 Sep 2005 18:33:45 GMT, "Jona Vark" <noemail@all.com> wrote:
> >>
> >> >if you were able to capture raw data from the CCD it would be nearly
> >> >unviewable. That said.. it would be a very difficult task indeed..
> >> >considering DV's 5:1 compression ratio you would be looking at a
125Mbs
> > data
> >> >stream which would need sufficient tweaking to make it viewable at
all.
> >>
> >> What are you talking about. I have been capturing uncompressed video
> >> since
> > 1999 using my Toaster NT.
> >> I had to be able to capture 22 MB/sec. SInce there is no compression,
it
> > requires 1 GB /minute. And
> >> I was able to edit up to 4 tracks (Layers) at a time. I would output
to
> > either S VHS, miniDV or DVD
> >>
> >
> >
> > Pay attention! I was talking about getting a 125Mb/s data down a 25Mb/s
> > format (DV).
> >
> >
> >
> >
> >
> OK, Thanks for the replies, i got the little b and big B now. :)
> But I wonder to the OP question, if it would still be possible since as
you
> say the dv format stream of 25mb/s is only really around 3.8 mB/s
> transfer, and the IEEE 1394 can transfer more data than that, right?
yes. J
> So theoretically transferring the uncompredded video off a dv camcorder
over
> 1394 would only be around 5 x 3.8mB/s of data.
> 19 mB/s, 1394 should handle that amount, no?
yes
And then that would be the full
> uncompressed video of about 125 mb/s.
> I realize you meant the DV standard is 25 Mb/s so sure regular dv codec
> wouldn't be used, naturally.
true
>
> But i would think if someone modified the camcorder to bypass the dv
> encoding in chip in camera and sent uncompressed video to computer thru
1394
> cable, you would need to also modify the 1394 card to receive such a data
> stream and not try to uncompress it or use the standar dvd codec to read
the
> data.
TYhe DV card is a standard 1394 card which is why it can work with hard
disks etc... No modification would be needed but a new driver would.
>
> It sounds possible in theory but who would do all this modifying to chip
> circuitry in camcorders?
Engineers like myself.
> It sounds more likely that a manufacture would just come out with a
digital
> camera that passes full video to PC using a special codec
> since PC's are faster now and can handle more processing power now.
Damn.. I wish. I had thought that would happen but what do we get instead?
HDV!
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