[mythtv-users] Objective IVTV quality measurement instructions

dean vanden heuvel deanv at cox.net
Sat Aug 14 00:06:58 EDT 2004


can the *image* linked below be used with a "CD" as opposed to a "DVD"?

-dvh

On Fri, 13 Aug 2004 21:31:51 -0400
"Jay R. Ashworth" <jra at baylink.com> wrote:

> On Fri, Aug 13, 2004 at 09:50:43AM -0400, Cory Papenfuss wrote:
> >   I posted this awhile back, but I never got too many responses.
> > My PVR-250 OEM has what I consider to be only adequate capture
> > resolution. The TV it's connected to can do a better job of displaying
> > cable TV signal and produces cleaner results. I've reduced the
> > variables enough to know it's not my tvout on the mythtv box. Playing
> > test patterns in a DVD player recording it with mythtv can help find
> > this out. I mastered a burnable DVD image awhile back:
> >
> > http://www.ee.vt.edu/~mythtv/TEST.tar.bz2
> >
> >   The EIA1956 test pattern is on there, at 720x480. Since it's
> > limited to 720 pixels, the test pattern itself is only 720*3/4=540
> > "lines of resolution" on a 4:3 TV. My pvr250 can only resolve about
> > 400-450 lines, even when capturing via the svid direct from the DVD
> > at 720x480. The TV OTOH can resolve the full 540 lines when connected
> > directly to the DVD player.
> >
> >   Anyone who feels like testing this and reporting back would
> > be appreciated. I discovered just how crappy my low-end BTTV
> > card was (350-400 max)... took it out of the box after that.
> 
> *Ghod*, I love grad students.
> 
> We just wouldn't get as much done in the US with grad students.
> 
> I'll be trying this out in the next day or three, Cory; thanks.  Does
> the image have any other useful test patterns on it?  I align a fair
> number of TV's and projectors in a year...
> 
> Cheers
> -- jra
> -- 
> Jay R. Ashworth                                                jra at baylink.com
> Designer                          Baylink                             RFC 2100
> Ashworth & Associates        The Things I Think                        '87 e24
> St Petersburg FL USA      http://baylink.pitas.com             +1 727 647 1274
> 
> 	"You know: I'm a fan of photosynthesis as much as the next guy,
> 	but if God merely wanted us to smell the flowers, he wouldn't 
> 	have invented a 3GHz microprocessor and a 3D graphics board."
> 					-- Luke Girardi
> 


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