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Posted by David McCall on 09/15/05 15:29
"Larry J." <usenet2@DE.LETE.THISljvideo.com> wrote in message
news:Xns96CE772931FC8larrythefrog@68.6.19.6...
> Waiving the right to remain silent, "DanR" <dhr22@sorrynospm.com>
> said:
>
>> But BetaSP has no compression and is
>> a component format. (RGB R-Y B-Y Y)
>
> No compression in the digital sense, but the color difference
> channels are half the bandwidth of the Y channel.
>
I don't remember what it was, but there was something that made
me think my PVW-2800 was digitally compressing the chroma
to create the color signal.
The 2 color signals get horizontally compressed, and recorded
side by side, then expanded back to full frame on output.
I've also found it to be a bit noisy in the chroma channels.
If you feed color bars through a switcher, pull the fader most of
the way to the bottom, then through a PVW deck, the output
will appear very noisy. I've done this test 3 times in different
environments (one was a Sony trade show booth). I never did
the test on the 75 or 1800, but I have noticed that saturated color
got noisy after a few generations on 75s.
Does this sound correct?
David
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