[opendtv] Re: 1080i and 1080p are the same resolution
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Sun, 14 Oct 2012 19:44:31 -0500
Peter Wilson wrote:
> The number of pixels is only part of the story. The dynamic vertical
> resolution is very different.
> Look at a fashion catwalk with the model approaching the camera and watch
> the detail in the costumes pump in and out as the model walks in a 1080I
> production.
> Good De-interlacing can make a big difference.
The author made two claims:
1. That the difference in quality is more a matter of frame rate, not
resolution.
2. That today's de-interlacers are amazingly good.
The first point I think, is valid and well demonstrated in his article. In
fact, the blurry background of the interlaced image is exactly what you'd
expect, with a 1/30th sec shutter speed as opposed to 1/60th.
What I don't know is to what extent broadcasters are limiting vertical res
these days, in DTV transmissions, to mitigate twitter. Or whether they are
counting on magical powers of modern day de-interlacers, and not damaging
vertical res at all?
I'm sure many on this august site would know.
Bert
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