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Posted by Anim8rFSK on 02/01/07 01:35
In article <MPG.202aceb5f9bbf0eb989892@newsgroups.comcast.net>,
Andrew Rossmann <andysnewsreply@no_junk.comcast.net> wrote:
> In article <D_6wh.832427$5R2.679581@pd7urf3no>, stuart_miller@shaw.ca
> says...
> >
> > <SFTVratings_troy@yahoo.com> wrote in message
> > news:1170274597.382084.36170@k78g2000cwa.googlegroups.com...
> > > For comparison other standards are:
> > > 240 - VHS (ditto Betamax)
> > > 330 - NTSC broadcast
> > > 425 - laserdisc (ditto S-VHS)
> > > 540 - DVD
> > >
> > > I was a bit surprised, but apparently the Electronics Industry
> > > Association measures the resolution differently than one might
> > > expect. They put a giant circle in the middle of the screen, count
> > > the number of visible pixels across, and arrive at a number like "425
> > > for laserdisc" or "540 for dvd". It seems counterintuitive, but
> > > that's how it's done.
> > >
> > > I imagine if the DVD is severely compressed, the quality would drop
> > > much lower than 540 (just as a VHS tape recorded in super-slow mode is
> > > only ~120 across). 540 is the ideal, not the norm.
> > >
> > Even in optimal situations, there are two resolutions to consider.
> > First is the signal. I had understood NTSC to be 525 each way, (for a video
> > camera)
> > Second is the display - there are regions of the signal ( top & bottom)
> > which are not displayed on the screen
> >
> > So what you actually see is less than what is recorded. The technical
> > sections of sites like digitalfaq explainm this properly.
>
> Don't confuse HORIZONTAL resolution with VERTICAL resolution.
>
> 525 is the VERTICAL resolution of NTSC. Of those 525, only 480 actually
> carry picture information. The rest are for sync, closed captioning, and
> other digital transmission features (parental control, XDS,
> TVGuideOnScreen, timecode for VCR's, etc...)
>
> The 240/330, etc mentioned above are rough HORIZONTAL resolutions.
>
> For reference, the HD resolutions are:
> 1280(h)x720(v)
> 1920(h)x1080(v)
Andrew, allow me to introduce you to Troy Heagy, performance troll and
the self styled "most annoying man on usenet"
Troy posts under at least half a dozen names (see below) and his game is
to create a thread that might otherwise be interesting, and introduce a
deliberate mistake into it, and watch it fall apart with people arguing
about his mistake instead the actual topic.
He's been busted in rec.arts.tv so many times that he's expanding his
net to other groups, like mostly sci-fi like Farscape, and technical
ones like these. But he sets the cross posts to rec.arts.tv to show
that he's still managing to annoy us here.
He'll now scream that we're haters, and are stalking him, etc., etc.,
etc., and probably threaten legal action, yadda yadda yadda.
Oh, and he sends death threats to people that expose him like this, and
then will claim they've been sending HIM death threats, and writing his
boss and trying to get him fired, blah blah blah.
Killfile Troy Heagy in all (s)he-its many incarnations now:
Troy.Heagy@gmail.com,videonovels@yahoo.com
videonovels2010@yahoo.com,telenovels@yahoo.com,fred_h_haddad@yahoo.com
**DON'T FORGET THE NEWEST ONE>>> SFTVratings_troy@yahoo.com
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