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Posted by Joshua Zyber on 01/18/07 13:08
"M.I.5" <no.one@no.where.NO_SPAM.co.uk> wrote in message
news:45af26cc$1_1@glkas0286.greenlnk.net...
>> I'll remind you that you're the one who came up with the ridiculous
>> 1440x1152 claim, not me. I've never claimed that the displays
>> contained an even multiplier of the source pixels. I'm trying to
>> debunk your claim that such is necessary.
>
> You can debunk all you like. All the professional AV engineers that
> we contract to seem to understand all this - and as I said, Wikipedia
> has a very good discussion of the subject (somewhere).
Find a reputable source and cite it. Right now. "Somewhere on Wikipedia"
and unnamed "professional AV engineers" don't cut it. If you're so
certain of your claims, they must be documented somewhere. Where would
that be?
>> Of course not. DVD pixels aren't square, but the display's pixels
>> are. Further, HD displays have much higher pixel counts than a DVD
>> source. There will never be a direct 1:1 correspondence.
>> Interpolation will always be necessary for those reasons. But that
>> doesn't mean that only a 1440x1152 display can capture DVD
>> resolution. Watching a Standard Definition DVD on a higher resolution
>> screen requires scaling. Interpolated pixels are not found in the
>> source, obviously.
>
> No, but as I said, Aliasing and artifacts from the interpolation will
> occur.
And this supports your claim how?
>> 720p, 1080i, and 1080p are not recognized HD formats anymore? When
>> did that happen?
>
> Which displays have a vertical pixel count of 720 or 1080 pixels? OK,
> there are quite a few in the professional market but the vast majority
> in the consumer market don't.
1280x720
http://www.bestbuy.com/site/olspage.jsp?skuId=7699065&type=product&productCategoryId=pcmcat95100050031&id=1138084904330
1280x720
http://www.bestbuy.com/site/olspage.jsp?skuId=8186054&type=product&productCategoryId=pcmcat95100050031&id=1164155954093
1920x1080
http://www.bestbuy.com/site/olspage.jsp?skuId=7705771&type=product&productCategoryId=pcmcat95100050031&id=1138085296639
1920x1080
http://www.bestbuy.com/site/olspage.jsp?skuId=7932767&type=product&productCategoryId=pcmcat95100050031&id=1149208957434
This is from a quick search of just one retailer's web site.
> And even if there were, the mapping would still not be mapped 1:1
> because of the undsiplayed border that this type of video signal is
> usually displayed with. (I'm trying to look out the specification)
Overscan and 1:1 pixel mapping are not mutually exclusive. You can 1:1
map a source to an overscanned screen. All that means is that the edges
of the picture will be hidden by the TV's bezel.
And you're obviously trying to throw out red herrings that have nothing
to do with your claim that a DVD requires twice its native resolution to
properly resolve. Don't think I haven't noticed.
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