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4K resolution hardware will officially be called ultra HD

The Consumer Electronics Association (CEA) has announced the official name for the next generation 4K high-definition display technology: "Ultra High-Definition" or "Ultra HD." According to the CEA, the name is intended to infer the new format's superiority over conventional HDTV.

The CEA Board of Industry Leaders voted unanimously this week to recommend the previously mentioned names for the new next-generation HD resolution. Along with agreeing on a name, the CEA also outlined minimal performance characteristics to help consumers and retailers understand the benefit of the new technology set to begin rolling out this fall.

“Ultra HD is the next natural step forward in display technologies, offering consumers an incredibly immersive viewing experience with outstanding new levels of picture quality,” said Gary Shapiro, president and CEO, CEA. “This new terminology and the recommended attributes will help consumers navigate the marketplace to find the TV that best meets their needs.”

The core characteristics that the CEA agreed on include a minimum display resolution of at least 8 million active pixels with at least 3840 pixels horizontal and at least 2160 vertical pixels.

To meet the minimum needs the display will have to have an aspect ratio of at least 16 x 9. Devices meeting the specifications will also be required to have at least one digital input capable of carrying and presenting native 4K format video at 3840 x 2160 resolution without relying on upconverting.

Source: CE.org



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RE: PC Monitors
By Solandri on 10/20/2012 3:26:53 AM , Rating: 2
Looks like the videophiles are out in force. I don't deny there will be a market for 4k TVs, just like there's a market for $5000 stereo components. I'm just saying for the typical TV buyer they'll be useless. Two of the major TV stations in LA broadcast in 1080i, the other two broadcast in 720p. I've challenged many people to tell me which two are 1080 and which are 720. Only one has been able to say correctly, and he admitted he was just guessing.

The 1 arc-minute of resolution is derived from the rayleigh limit. At a typical pupil diameter of 3 mm, the minimum separation before two objects blend into one is about 1/100 of a degree, or about 2/3rds an arc-minute. Even if you had a perfect retina, you can't distinguish apart objects smaller than this. It's the optical limit of your eye's lens.

Having binocular vision as well as being able to scan helps improve slightly over this. But we're talking about levels of detail where you'd have to strain to see differences. This is something that's relevant if you're examining scientific or crime scene photos. Not something you'll be doing while watching TV. Feel free to think you can see 10x higher resolution than this. Next time you're using a telescope try magnifying 10x higher than the theoretical max magnification and see if it really helps.

quote:
Their sensors take a picture of the Earth at 1 km resolution at nadir (straight down). However, they routinely image the bridge going across Lake Pontchartrain. Clearly that bridge is no where near one kilometer wide (in reality it is under 0.1 km wide!) yet it shows up in GOES imagery! And the resolution of the GOES sensor is worse than 1 km per pixel at that latitude!

... If that's the basis for your misguided beliefs, I don't even know what to say. Please read up on some sampling theory.

Having a resolving limit of 1 km doesn't mean you can't detect objects smaller than 1 km. It means you can't distinguish between objects smaller than 1 km. That is, if you imaged a 300m ship with the same reflectance characteristics as the bridge (same brightness and color), you wouldn't be able to distinguish it from the bridge. For the purposes of the GOES sensor, all objects 1km or smaller with the same reflectivity are the same.

In TV terms relevant to this discussion, at a 6 foot viewing distance, a pixel smudge on a 50" 1080p screen would be indistinguishable from 2x2 pixels on a 50" 4k screen. The additional detail is there on the 4k screen. It's just that like the GOES sensor, your eye cannot tell the 1080p smudge pixel apart from the sharper 2x2 pixels on the 4k screen.


RE: PC Monitors
By DarkUltra on 10/22/2012 4:25:45 PM , Rating: 2
It's not just about the number of pixels and cone cells, but about pixel blending and aliasing. What we need is a proper "blind" test where the viewers does not know what resolution they are looking at.

Like this one, but with pixels instead of framerate:
http://www.youtube.com/watch?v=a2IF9ZPwgDM


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