[opendtv] Re: Math of oversampling - a simple comparison
- From: Jeroen Stessen <jeroen.stessen@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 28 Apr 2005 16:14:07 +0200
Hi,
Craig:
> What I believe we are dealing with here is the relationship between
> the visual acuity of the viewer and the ability of any sampling grid
> to equal or surpass that level of acuity.
But... we can't discuss each other's visual acuity, because
we don't know the viewing distance of the other person !
The only thing that is not variable is the original image
content, so I would have to go with Tom's theory that we are
reaching a cutoff frequency where the image content begins
to be significant. And since this is just an arbitrary image,
and not too well focussed according to Doug, it can only be a
coincidence that this cutoff happens between 480 and 544 lines.
> If Tom and Jeroen have time to play, I would like to see a
> down/up sample pass through 1024 x 576P. My educated guess is
> that it will be nearly impossible to see the difference from
> the original.
I will generate it immediately, and mail it to Tom and Craig
(oh, and to Bob Miller too).
Cheers,
-- Jeroen
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