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Posted by Barry Watzman on 01/17/07 14:39
Re: "overscan is an "attribute" of CRTs"
No, wrong. All rear projection displays overscan at least slightly,
even if they are digital (this includes LCD and LCoS projection, as well
as DMD). In fact, overscan is effectively required by law (the law
doesn't actually require overscan, but it does require that the picture
totally fill the screen. It's an artifact going back to the 1950's and
the days of small round picture tubes, but it's still on the books). On
a rear projection set, regardless of the source of the projected image,
the only way to assure this is to slightly overscan the screen). There
is not such explicit control of the optics and the magnification ratio
that the projected digital display can be made to just exactly fill the
screen, so a slight amount of overscan is used .... the entire
resolution (say 1920x1080) is generated, but it's projected onto the
viewing screen with a very slight amount of overscan so that the screen
is assured to be filled on every single set coming off the production line.
[In fact, digital displays using three-element LCD and LCoS even still
have convergence adjustments to overlap the 3 image elements exactly.]
The only sets that don't overscan at all are direct view digital
displays, e.g. direct view (not projection) LCD and plasma.
MassiveProng wrote:
> On Wed, 17 Jan 2007 08:20:08 -0000, "M.I.5?"
> <no.one@no.where.NO_SPAM.co.uk> Gave us:
>
>> "Richard C." <post-age@spamcop.net> wrote in message
>> news:TrmdnX9zEfhh5jDYnZ2dnUVZ_ruknZ2d@comcast.com...
>>> "MassiveProng" <MassiveProng@thebarattheendoftheuniverse.org> wrote in
>>> message news:5dtqq2dt1c2krp8gpgblmnc1h1ujf76q6u@4ax.com...
>>>> On Tue, 16 Jan 2007 19:30:26 +0100, Martin Heffels
>>>> <twentyfourthof@november.edu> Gave us:
>>>>
>>>>> On Tue, 16 Jan 2007 09:33:21 -0800, "Richard C." <post-age@spamcop.net>
>>>>> wrote:
>>>>>
>>>>>> top, top, top!
>>>>> Can you please keep this off-topic chat about top and bottom posting,
>>>>> in the group where you lot usually hang out? Thanks heaps :-)
>>>> FIND the original poster of this utter CRAP, and jump on HIS ass,
>>>> disphit.
>>> ===============================
>>> That would be YOU, asshole!
>>> YOU are the one who keeps starting things about top posting.
>>> What a putz!
>>> ==========================
>> Certainly was. I even checked back.
>>
> Liar. You didn't filter me any more than you did Zyber after you
> declared a plonk on him. You filter tards are a piece of work.
>
> You are just too fucking wussified to respond.
>
> Also, the twit was talking about the number of groups crossposted
> to, not just the top posting rant, so fuck off. You can't even
> interpret modern video, so we could in no way expect your retarded ass
> to be able to read Usenet, particularly when you lie about filtering.
> What a wuss you are.
>
> HDMI is a digital interface, disphit, and overscan is an "attribute"
> of CRTs, but I don't expect a twit that thinks his standard DVDs are
> going to look great on an HD display to understand.
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