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larryp
Joined: 24 Jan 2012
Posts: 252
Location: eden prairie mn
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| Posted: Sun Oct 23, 2016 5:02 pm Post subject: 4 K |
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I have a Sony 1272 running 1080I.
I know the projector can't handle 4k,, but was wondering If I watched Netflix 4k, Would I see ANY noticeable improvement in picture quality? Just curious
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sun Oct 23, 2016 6:25 pm Post subject: |
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How are you even going to get the 4K signal into the projector?
Some Lumagen scalers can downsample 4K to something your projector can handle, but you can not get a better
image quality than the resolution being delivered to the projector.
4K sharpness can not be conveyed in a 1080p signal.
4K is a dream for CRT projection enthusiasts, one that is highly unlikely to come true unless we get a CRT enthusiast in
our community who has the desire and the the resources to spend millions of dollars developing a super high bandwidth
CRT projection system that currently does not exist.
You'd be much better off to upgrade to a top 9" CRT projector for image quality improvement, or if 4K is really what you want,
get a 4K digital like a JVC RS...whatever.
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larryp
Joined: 24 Jan 2012
Posts: 252
Location: eden prairie mn
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| Posted: Sun Oct 23, 2016 10:28 pm Post subject: |
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It's just a information question. Just wondering if the picture would change at all. Not looking to upgrade anything either.
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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larryp
Joined: 24 Jan 2012
Posts: 252
Location: eden prairie mn
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| Posted: Mon Oct 24, 2016 5:43 pm Post subject: |
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You don't understand , never mind
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Oct 24, 2016 6:09 pm Post subject: |
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To answer your real question: probably no. The 1272 can already display only a portion (probably 3/4?) of 1080P, so if we believe downscaled 4K looks only slightly better than native 1080P content, then further downscaled (even if it is done by the electron beam of your Sony) will give undetectable difference.
On the other hand I think we live the days still when vast majority of the 4K materials are only "look better" because a good ammount of edge enhancement was added to the original content. But honestly for that you don't need 4K...
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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the dude
Joined: 11 Sep 2013
Posts: 179
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| Posted: Thu Oct 27, 2016 4:52 am Post subject: |
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I disagree, its not all about number of pixels...
It makes a difference where the downscaling ocours! Thats because all video codecs use spectral data reduction, so if you downscale to 2k and compress the compression removes information that you can see. If you compress 4K material in the first place data compression affects information that is invisible in 2k anyway.
But maybe it makes no difference when streaming, it depents on the actual bitrates.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Thu Oct 27, 2016 5:36 am Post subject: |
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| the dude wrote: | I disagree, its not all about number of pixels...
It makes a difference where the downscaling ocours! Thats because all video codecs use spectral data reduction, so if you downscale to 2k and compress the compression removes information that you can see. If you compress 4K material in the first place data compression affects information that is invisible in 2k anyway.
But maybe it makes no difference when streaming, it depents on the actual bitrates. |
Normally, you'd have a point. The problem is the 1272 is only resolving somewhere around 720p. It's a little better than 540p, but not even close to 1080p. So, how much difference will be visible between content compressed at 1080p, and content compressed at 2160p, but all displayed at 1080i and resolving something much less than that? Answer: Zilch.
SC
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Thu Oct 27, 2016 6:24 pm Post subject: |
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| ecrabb wrote: | | the dude wrote: | I disagree, its not all about number of pixels...
It makes a difference where the downscaling ocours! Thats because all video codecs use spectral data reduction, so if you downscale to 2k and compress the compression removes information that you can see. If you compress 4K material in the first place data compression affects information that is invisible in 2k anyway.
But maybe it makes no difference when streaming, it depents on the actual bitrates. |
Normally, you'd have a point. The problem is the 1272 is only resolving somewhere around 720p. It's a little better than 540p, but not even close to 1080p. So, how much difference will be visible between content compressed at 1080p, and content compressed at 2160p, but all displayed at 1080i and resolving something much less than that? Answer: Zilch.
SC |
LOL, I was thinking the same.
Larry,
There are plenty of 8" pjs out there for next to nothing. Why don't you pick one of those up?
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