[opendtv] Re: Trial FOTA HDTV in France
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Fri, 9 Jun 2006 10:09:30 -0400
At 9:08 AM -0400 6/9/06, Mark Schubin wrote:
>You seem to be in complete agreement with me that that 1080- and
>720-line HD formats did NOT originate with ATSC or the Grand Alliance.
>
In principle yes.
I was not aware that Charles Poynton came up with the 1920 x 1080
numbers, as there was a wealth of work going on related to this at
the time I got involved with the ACATS/ATSC process in 1992. Charles
and I were (and still are) strong proponents of orthogonal sampling
grids (i.e. square pixels). and the 1920 x 1080 numbers were a
natural fallout, when you looked at options for 2 Mpixel formats
(except for the slight misalignment with the 16 x 16 macroblock
structure of MPEG-2 (i.e. 1088 lines).
I was aware that Kerns Powers was the first to propose the 1280 x 720 raster.
You seem not to have storing objections to the notion that we can now
produce video at any raster size, aspect ratio and frame rate. While
I have long been a proponent of this approach, I DO acknowledge that
there will be a limited number of acquisition format for economy of
scale realities. It is when we optimize content during production and
preparation for emission that we can take full advantage of the
"format agnostic" nature of digital video compression.
Regards
Craig
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