[opendtv] Re: HP and Philips to Begin Licensing Video Content Protection System to Manufacturers after Gaining FCC Approval
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 5 Aug 2004 20:37:37 -0400
Terry,
No argument from me about properly processed SDI video! Our studio uses a
Ross Synergy SDI production switcher, and our cameras are SDI encoded from
the RGB out of the camera CCUs. No NTSC composite jaggies on chroma edges!
The resulting video when displayed on an SDI input monitor is simply
stunning.
Unfortunately, we do not have an SDI master control switcher, nor an SDI STL
to our transmitter, nor an SDI input to the NTSC exciter of our transmitter,
so much of that stunning beauty gets lost.
But then again, most of the video we air comes to us from PBS, which uses
Digicipher II compression to deliver that content, and it is definitely much
lower than full SDI resolution and beauty. For one thing, Digicipher II
delivers MPEG 2 using 4:2:0 chroma, as does all ATSC formats, so right there
you're killing a lot of chroma resolution compared to pristine 4:2:2 SDI
video. To be fair, DVDs are also 4:2:0 chroma.
I still believe that the majority of DVD's superior video quality comes from
the non-real time compression procedure.
Cheers,
John Shutt
----- Original Message -----
From: <tjharvey@xxxxxxx>
> If you recall at the Harris NAB stand I think in '98, William Kennard, the
FCC Chairman pointed to a monitor extolling HD? It was in fact SD properly
represented!
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