Projector Mini-Shootout Thread - Page 564 - AVS Forum | Home Theater Discussions And Reviews
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post #16891 of 16897 Old Today, 01:15 PM
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Originally Posted by Ruined View Post
It seems to be somehow selectively shifting or at least gives that appearance.
Yea. The most obvious might be on the horizontal black line:



I wonder if instead of having an active eShift element they have 3 different positions for the mirrors (one being off for black) and one path has an element that shifts the pixels 1/2 of a pixel diagonally compared to the other "on" path. Kind of a non-active eShift. That way they could do "eShift" mirror by mirror.

This selective eShift seems like a nice advantage over traditional eShift to me.

--Darin
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post #16892 of 16897 Old Today, 01:18 PM
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If you look the nvidia logo in both of my shots you can clearly see that the PD8150's 1080p image looks distinctly better at showing the logo in it's full detail. You can clearly see that some kind of odd scaling is happening during the XPR process that doesn't allow for the full 4K (or native resolution) image to be shown in a 1:1 pixel mapped way. I think that proves XPR is engaged.
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post #16893 of 16897 Old Today, 01:26 PM
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Darin, I see you're trying to scale the image I posted to get some more information out of it. Here is the original photo in much higher resolution. It should help you get a closer look:

http://i.imgur.com/gUD9kmQ.jpg
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post #16894 of 16897 Old Today, 01:29 PM
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I will try and post some single pixel UHD test patterns later tonight and you guys can tell me what you think. Though I'm not a great photographer but I'll do my best to get the photos to look as close to what I'm seeing on screen as possible.
Seegs if you have a dlsr and did both a slower shutter exposure and a series of ultra fast shutter exposures you might actually be able to see what is happening. Would take a lot of time and sifting through photos though.
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post #16895 of 16897 Old Today, 01:32 PM
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Originally Posted by Seegs108 View Post
Darin, I see you're trying to scale the image I posted to get some more information out of it. Here is the original photo in much higher resolution.
Thanks. Here are the 2 examples just cutting from your original:





--Darin
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post #16896 of 16897 Old Today, 01:42 PM
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Originally Posted by darinp View Post
Yea. The most obvious might be on the horizontal black line:



I wonder if instead of having an active eShift element they have 3 different positions for the mirrors (one being off for black) and one path has an element that shifts the pixels 1/2 of a pixel diagonally compared to the other "on" path. Kind of a non-active eShift. That way they could do "eShift" mirror by mirror.

This selective eShift seems like a nice advantage over traditional eShift to me.

--Darin
I thought of that but then I wonder how they retrofit this to the old 2560x1600 0.95" DMD Barco is using for XPR. Definitely possible but would be a lot more complex than traditional eShift retrofit.

Also looks a ton more precise than traditional eShift though so worth the effort IMO.

Would be interesting to see how much the Barco Loki outresolves this pj, also, with this same test.

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post #16897 of 16897 Old Today, 04:09 PM
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Originally Posted by Seegs108 View Post
But I also haven't spent enough time with this unit to say how well it enhances contrast with actual content. What I mean is, I haven't spent enough time to see if there's a decent increase in contrast when real content is being displayed and if most of this ~3.5x increase is only for when a 100% all black image is on screen. Contrast performance is subjectively a lot better than I thought it was going to be from what I've seen so far and I think that is a good indication that contrast is being enhanced a decent amount with real content on screen.
That's generally the problem with dynamic contrast, either the dynamic iris or lamp dimmer is too noticeable, or if not noticeable it is partially due to the fact that the algorithm does not always kick in when you need it to.

I find it almost funny (hilarious?) that a $1000 Mitsubishi hc4000 using Dark Chip 3 could do 4500:1 Native and potentially 1000:1 ANSI (or at least 600:1 depending who you believe), and that now we are back to 1500:1 native. Cine 4 even measured the hc4000 at 4500:1, and it could do it around 800 lumens if I recall correctly, without an iris. That said, it's possible the measurements were off a bit, but it was Cine4, and I measured one myself not too far from that number.

That said, even the Mits hc7900 and hc8000 and Sharp xvz-30000 can beat 1400:1, of course the projectors were manufactured at basically the same cost as those newer UHD ones. Mits took a major loss on all their final HT projectors when trying to get into the higher-end again, that's why they got out. They cut the production run short too, so it's nearly impossible to find one now, even hard in the used market. Too much RBE anyhow, just saying.

Now on my Benq w7000 I measured a measly 900:1 after calibration.

Perhaps the Benq Super-DLP Model 99000 in Year 2022 and we'll be back to 200:1 on/off

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