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Kristoff Bonne wrote:
> Gegroet,
>
> Doug McDonald schreef:
>
>>> If you want to have this content in 60 Hz, then the question is
>>> simple. Are you willing to pay the extra costs for this?
>
>
>> Yes .... of course! NBC has already said that all of the 2006
>> Winter Olympics will be in HD.
>
> Sure, but 720p/50Hz is HD too, isn't it?
Not in the US it is not. It would be "ED" officially. In practice,
FOR STATIC STUFF like talking heads, of course it is HD.
BUT ... when sports are converted from 50 to 60Hz, it MOST
EMPHATICALLY ceases to be even ED .... not even SD ....
it is simply either mud or vapor. The Olympics were
a great example of this. The 50->60 Hz conversions
of both the HD (it was 1080@50i which is unequivocally HD)
and SD programs were awful. It was just harder to tell on SD
since the SD was analog. The same disastrous breakups
were present.
There were double images, improperly placed interpolations,
edges of things that interpolated to jagged pastiches of
adjacent in time frames, and sometimes, especially in flying logos,
simply large areas of white where stuff should have been. Divers ...
diving and swimming was the worst ... with missing limbs, divers
split in half and superimposed on the wrong part of the background,
etc.
It is clear just from thought that a 50->60 HZ conversion is
an EXCEEDINGLY difficult problem with only one correct solution:
a computer modelling of the entire scene, converting it to
a vector-planar representation of each scene, followed by
a computer simulation of the motion, followed by a full
re-rendering of the scene of each frame. And the information
available for the modelling part would likely have to be
derived from a second or so of data. This would simply not be
possible at the present time in real time.
We regularly get HD sports in the US ... it is commonplace ...
and the results are spectacularly good. Last night I both watched
the football game and looked at the spectral content of the
component output of my STB box's luma channel. The pixel clock is
about 74 MHZ, and I saw real, non-aliased, actually useful,
information out to over 30MHz ... despite the 3 dB point of the STB
being 18 MHz. I know it was real pictorial information because I
could see a difference in the picture if I used cables that changed
the 3 dB point to 12 MHz. There was absolutely ZERO of the
artifacts I saw on the Olympics ... even the flying logos in freeze
frame were excellent, and they could not be encoded as motion
vectors since they move too fast.
Doug McDonald
>
> The 2006 wintergames are in Italy, so a 50Hz country.
>
>
> > ... Virtually ALL of HD transmissions are in 60HZ countries.
> > Ergo, use a 60HZ system.
>
> Wrong attitude. You are the buyer, and -in a monopoly-based business-
> you're on the wrong side of the counter.
>
> We who controls the content, controls it all.
>
>
>> Europe, of course, is sufficiently backwards not to need
>> an HD feed.
>
> Never mind. I might be watching it as a datacast on my mobile phone.
>
>
> People are much more "on the move" then they are at home watching TV.
>
>
>
>
>> Doug McDonald
>
> Cheerio! Kr. Bonne.