You folks don't seem to grok square pixels vs. non square pixels.
http://en.wikipedia.org/wiki/Pixel_aspect_ratio
And here you can see the ATSC standards for SD, both square and non square:
http://en.wikipedia.org/wiki/ATSC_standards
--- In Avid-L2@yahoogroups.com, Michael Brockington <brocking@...> wrote:
>
> I'm with Steve on this one.
>
> 720x486 = 349,920 pixels
> 640x480 = 307,200 pixels
>
> They might both be SD technically, but the first one has about 14% more
> resolution.
>
> Cheers,
> --Michael
>
> On 12-01-25 3:14 PM, Mark Spano wrote:
> >
> > Steve,
> >
> > 480 lines of resolution is SD. The math there is that .9 ratio times 720
> > equals 648 but that is representative over 486 lines. 640 is the best math
> > for 4x3 to get 480. (640 *3 / 4 = 480). And we're talking about square
> > pixels, so that math works out perfectly.
> >
> > The artful look of the square is the best reason I've ever heard why
> > anyone
> > would shoot this way. But possibly the fear of downconversion softness is
> > why they shot SD for an SD spot.
> >
> > good luck...
> > -Mark
> >
> > On Wed, Jan 25, 2012 at 6:08 PM, Steve Hullfish
> > <steve4lists@... <mailto:steve4lists%40veralith.com>>wrote:
> >
> > > I don't buy that. I mean I know it's CLOSE to real SD, but...
> > >
> > > The difference between square pixels and 601 pixels is .9 right? The
> > math
> > > (720x.9) works out to slighly more than 640. And 480 is a little shy
> > of 486.
> > >
> > > Avid used to claim 640x 480 was broadcast SD, but it's really 720x486.
> > > With 720x480 being DV and DVD.
> > >
> > > So it's CLOSE to SD, but I say it's NOT SD. The bigger question is WHY
> > > shoot 4:3 SD when you have a 16:9 camera? For the artful look of the
> > > square? :-)
> > >
> > > Steve Hullfish
> > > contributor: www.provideocoalition.com
> > > author: "The Art and Technique of Digital Color Correction"
> > >
> > > On Jan 25, 2012, at 4:38 PM, Terence Curren wrote:
> > >
> > > >
> > > >
> > > > --- In Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>,
> > Steve Hullfish <steve4lists@> wrote:
> > > >
> > > > <<it has a 640x480 setting. So that's actually LESS than SD.>>
> > > >
> > > > Not actually. If it's square pixels that is SD.
> > > >
> > > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Search the official Complete Avid-L archives at:
> > > http://archives.bengrosser.com/avid/
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> > [Non-text portions of this message have been removed]
> >
> >
>
>
> [Non-text portions of this message have been removed]
>
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