[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"?
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...
> -- 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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