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geekhack Community => Off Topic => Topic started by: tp4tissue on Tue, 10 October 2017, 23:18:16

Title: GDI Now I want REAL 4K
Post by: tp4tissue on Tue, 10 October 2017, 23:18:16: So,

Probably everyone's hurd of 4:2:0 by now.

For the n00bies, on a normal 1080p bluray, each frame contains 1920x1080 brightness information, HOWEVER, @ 4:2:0, it only contains 960x540 Color information or 1/4 chroma.

Now that we're in the 4K era. It's still 4:2:0. But at 3840x2160, the Color information has finally been updated to 1080p.. hahahahaha

But Now I really really wonder, What does REAL 4K with 4:4:4 video look like..

Man... can't wait for 8K... Then I can wonder what 8K with 4:4:4 will look like.. hahahahahaha
Title: Re: GDI Now I want REAL 4K
Post by: Findecanor on Wed, 11 October 2017, 03:33:01: You can get movies in real 4K only in a movie theatre. It is wide enough and has 4:4:4.

"4K" is a cinema standard for:
- a display that is at least 4096×2160, which is slightly wider than 16:9 of TVs.
- an image that fills either the width, the height or both.
- 4:4:4 colour, and
- The DCI-P3 colour space, which can have richer colours than a standard TV.

Consumer displays that can show real 4K do exist but are rare.
The most accessible one would be an 21.5" iMac "with retina display", which has a screen of 4096×2304, with the primaries of DCI-P3 but the gamut of "Full HD"/sRGB

The actual name for the TV standard is not "4K" but "Ultra HD".
When it was under development, there was a lot of talk about making it support true 4K, and that did seep out into the press. Ultimately, they decided to do it 16:9 like "Full HD" so as not to get black bars on upscaled content.
Sony was first to call their devices "4K UHD", as a way to show early adopters that this is what all that 4K work had resulted in .. and then it spiralled from there.

"High dynamic range" (HDR) is most often a buzz word for when a screen supports a better colours space than HD television/sRGB, and/or if it supports more bit depth than 8 (256 brightness levels) for each primary (R,G,B).
Ultra HD supports the Rec.2020 colour space that is wider than DCI-P3. However ... even if a screen is marked as supporting "HDR" that may refer only to the electronics. Whether the screen is actually capable of the full colour space of DCI-P3 or "Adobe RGB" (or whatever) is another issue.
The Rec.2020 colour space is wider than what practically any display on the market right now is capable of, except for perhaps some very expensive OLED. Not all LCD computer monitors right now are even able to support the full sRGB colour space and only the very best support DCI-P3 or Adobe RGB (which is close to DCI-P3).
Title: Re: GDI Now I want REAL 4K
Post by: tp4tissue on Wed, 11 October 2017, 14:40:15: I'm not hung up on what they call it..

But data is data..

We're only getting 5/8 of what they're trying to sell..
Title: Re: GDI Now I want REAL 4K
Post by: noisyturtle on Wed, 11 October 2017, 15:03:57: 4k? more like 4gay ^-^
Title: Re: GDI Now I want REAL 4K
Post by: DALExSNAIL on Wed, 11 October 2017, 15:17:01: Quote from: tp4tissue on Tue, 10 October 2017, 23:18:16
4:2:0

(http://vignette4.wikia.nocookie.net/h3h3/images/9/96/2cff41739ca69cdb5585319b8d12a7b9.jpg/revision/latest?cb=20160601222325)
Title: Re: GDI Now I want REAL 4K
Post by: tp4tissue on Wed, 11 October 2017, 16:29:08: Quote from: DudeSnail on Wed, 11 October 2017, 15:17:01
Quote from: tp4tissue on Tue, 10 October 2017, 23:18:16
4:2:0

Show Image
(http://vignette4.wikia.nocookie.net/h3h3/images/9/96/2cff41739ca69cdb5585319b8d12a7b9.jpg/revision/latest?cb=20160601222325)

This photo is the culmination of everything I do not want to be..
Title: Re: GDI Now I want REAL 4K
Post by: noisyturtle on Wed, 11 October 2017, 19:21:29: Quote from: tp4tissue on Wed, 11 October 2017, 16:29:08
Quote from: DudeSnail on Wed, 11 October 2017, 15:17:01
Quote from: tp4tissue on Tue, 10 October 2017, 23:18:16
4:2:0

Show Image
(http://vignette4.wikia.nocookie.net/h3h3/images/9/96/2cff41739ca69cdb5585319b8d12a7b9.jpg/revision/latest?cb=20160601222325)

This photo is the culmination of everything I do not want to be..

you need goals and dedication to get that sexy ass fupa
Title: Re: GDI Now I want REAL 4K
Post by: tp4tissue on Wed, 11 October 2017, 20:11:31: Quote from: noisyturtle on Wed, 11 October 2017, 19:21:29

you need goals and dedication to get that sexy ass fupa

Fupa .. hahahahahaha
Title: Re: GDI Now I want REAL 4K
Post by: pixelpusher on Wed, 11 October 2017, 23:34:00: Vape Nashe, with the fat cloud rippers!
Title: Re: GDI Now I want REAL 4K
Post by: tp4tissue on Mon, 16 October 2017, 09:00:33: OMG..

Just found out most of these current UHD movies still use 2K digital intermediates..

That probably means they're gonna sell Remasters in the future.. where the DI is all 4K..

Sigh........................................

For the newbies, 2K DI basically means the end product is 1080p. It has full 1080p chroma, so the 4K bluray should still look much better than the normal 1080p Bluray because it has 4x the color information.

HOWEVER, it's not --The promised spec--

For cost reasons, they also render the CGI in 2K (saves render time), so.... sigh............