Ultra High Definition Television

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Ultra High Definition Television
whY4k?
So, now they’re making television sets with 16 times the pixels of your HDTV.

Those of you who’ve recently had their eyeballs replaced with state of the art audio-visual globes powered by a black hole at the dawn of time will appreciate this a lot.

Those of us with regular vision might also get a kick out of it!


Indeed, UHDTV is actually a blanket term for two separate resolutions...
You’ve got your ‘standard4K UHD offering 8 mega-pixel imagery, 3840 x 2160 resolution and clocking in at four times the size of even the swankiest 1080p telly.

Then there’s the ‘CrazyGoNuts8K UHD!
These 7680 x 4320 screens handle visuals of 33.2Mp.
The level of detail here mirrors a 15/70mm IMAX and would need sixteen 1080p’s to match just one of these monsters.

If eyes could salivate, eh? Wait a minute...

Moving on, NHK Science & Technology Research Laboratories and the International Telecommunication Union are not completely ignorant to the layman’s televisual needs, (Though they may be as to the size of his wallet, more on that later...) because UHDTV was designed with 16:9 displays in mind. Not only do they support these dimensions but each model will ship with at least one native 3840x2160 input as standard. (Not every UHDTV is a CrazyGoNuts)


UHDTVs feature Rec. 2020. You don’t know what that means. Neither do I. But at a guess I’d venture it’s a specific recommendation from the aforementioned ITU regarding display resolution, frame rate, chroma subsampling, colour depth, and colour space.

On the latter, in the study of colour perception, one of the earliest mathematically derived colour space tests (i.e. how good your peepers are) is the CIE 1931 XYZ colour space.
Rec. 2020 covers 75.8% of this colour space.
By contrast, Digital Cinema manages 53.6%,
Adobe RGB covers 52.1%
and Rec. 709 (the value of High Definition Television) covers 35.9%.
For the mathematically challenged (no judgement this end) the improvement is staggering.
I literally staggered.

Red. 2020 also enables a frankly absurd 120 frames per second. Given The Hobbit’s 48fps caused such hubbub and the coveted 60fps is a Gaming pinnacle, one hundred and twenty frames in the span of a single beat of an athletic heart is pretty damn good!


But what of that monstrosity taking up half your living space? The one you like to call your DVD collection? Listen, I’m not exactly comfortable that as soon as UHDTVs hit the (reinforced) shelves, the Digital Versatile Disc will be TWO generations old either! But mercifully UHDTVs are set to come with processors and chipsets to upscale ‘old’ HDTV formats.

Indeed, thanks to the 3840 x 2160 resolution, video upscaling is a relatively simplified affair. (Hint - Remember, Pixels are SQUARE)

1080p can be scaled perfectly by doubling pixels both horizontally and vertically. Thus every 4 pixels on a UHD display will represent a single 1080p pixel. Similarly a 720p source need only X9 its pixels to upscale sufficiently. Needless to say, 8K resolutions implement similar arithmetic.


Before you raid your life savings though, it’s worth mentioning UHDTVs are not easily nabbed at your local Peats/Curries/Best Buy... I don’t actually know where you live, yo!

Japan’s JIAC network is preparing to broadcast the World Cup in 4K. This sounds nothing short of glorious. But for those keeping score, the next World Cup won’t occur for another 18 months.
Elsewhere Sony might sell you their 84” KD-84X9005 4K UHDTV. But they’ll also charge you £25,000 for the pleasure. And with extremely limited 4K content on offer, it could be a while before consumers start selling off their loved ones and take the plunge.

So, Ultra High Definition Television. It’s on its way. And it’s looking to tear your eyesight a new one! But while the next generation in obscene Audio-Visual home entertainment seems imposing, rest assured it’ll be a good long while before it’s heft (both physical and financial) bows the top of your coffee table!


Ultra High Definition Television on ClickOnline.com


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jack@clickonline.com
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