Originally Posted by Powerr
I just got my 65r17 tv delivered today... Is this the screen uniformity issues people talk about? ...
I needed to blow up the pics to see it. I see a red fringe, not unlike a posterization effect, surrounding a contour of equal brightness. Is this what you're asking about?
I have seen it once on my 55p615, but I blamed the Tivo Bolt image source. A simple po/po solved it, and it hasn't returned.
At that time, I was also exploring the panel's capabilities, so I may have had the brightness very high. I have since linked high brightness to RED calibration
issues (just got a colorimeter), so the defect may be linked, too. Mine went away on its own, and if it doesn't, try reducing screen brightness (i.e. lower contrast setting).
Originally Posted by Donny84
From where I'm sitting for bluray and neflix I wouldn't be able to to even see 4k. You have to be sitting closer than ...
That's what I thought, until I plunked a 55P615 next to my calibrated LG 60PB6900 plasma. I sit 10' from the pair - SD distance even with a 60. The 55P615 blows it away! There is no individual comparison that doesn't go to the 4K panel, it wins in every category. The wife even agrees, she just wants one of the panels to go away.
Please understand I'm a retired image scientist. I know all the arguments, and have argued for them in the past. I now understand that calculations based on human visual acuity fail to consider raster-related defects, and the impact they have on perceived image quality. The high micro-contrast of flat panels amplifies some things into defects, while making the rest of the image just look sharper. This is not something related to resolving individual pixels but rather a benefit of oversampling... seeing several pixels per arcsecond has benefits! (human visual acuity is about 1 cycle/arcsecond or 60 cycles/degree).
The obvious one is tennis courts. High contrast H or V lines will flash, especially if they're narrow. Then there's the benefit of upscaling in image processing; you can't add detail, but you can sharpen what you have
. The image simply appears sharper when viewing the same program side-by-side. I've controlled for data rate; both were OTA signals. It's in the panel.
Color was not as good as the calibrated plasma using user controls (brightness/contrast/color/tone) until I started in with the colorimeter. Now it blows the calibrated plasma's socks off, and that's in Rec 709 configuration (HD). Haven't played with 4k features yet, but contrast and color enhancements will certainly be visible from a distance. I was with you, buddy, until I saw the 4K light for myself.
And FWIW, I've been able to calibrate it with a 25,000:1 contrast ratio, so there's no question of black blacks, but it looks like crap that way in my room. Calibration is personal.