Αρθρο για τις 4K τηλεοράσεις

Νταξ, το χουμε πει, η βασική βελτίωση που θα φερουν (λογικά) τα 4Κ θα είναι το καλύτερο mastering του υλικού

Από εκει και περα κι εγω που ψάχνομαι για TV αυτές τις μέρες και θελω να αποφυγω τα 4Κ (επειδή θεωρω ότι στην παρουσα φαση αλλά και στο άμεσο μέλλον, εχουν πιο πολλα - από +), βλεπω ότι εχω πλεον όλο και λιγότερες επιλογές...
 
Θα είναι καλύτερο το mastering; Ή θα πήξουμε στην δυναμική αντίθεση, που το βαφτίσουν HDR;
 
Αν και λιγο παλιο
Why 4k Tvs are still stupid

Και τo θεμα δεν ειναι οτι τσιμπαει ο κοσμος και παει και ψωνίζει αλλα οτι απο πισω υπάρχει βιομηχανία που σπρώχνει οτι μαλακία βγάλουν οι εταιριες.
Ποσα σοβαρά av sites έχουν κράξει τις 4κ (οπως θα επρεπε)

Το αρθρο κλείνει εξαρετικά
You see, TV companies are pushing 4K because they can. It's easy, or at least easier than improving the more important aspects of picture quality (like contrast ratio, color accuracy, motion blur, compression artifacts, and so on).
Click to expand...
 
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BBC's UHD head doesn't own an Ultra HD TV

Johns was joined on stage by Andy Quested, head of HD and UHD at the BBC. Neither men own a UHD television, nor did any of the audience, made up of representatives, executives and engineers from a wide range of TV broadcasters, manufacturers and technology companies.

:flipout:

@Slalom , μάλλον εννοούν τα πρώτα μοντέλα με HDMI 1.3 αντί για 2.0.
 
[display-central.com]...Definition of UHD TV Becomes More Muddied...http://www.display-central.com/free-news/display-daily/definition-uhd-tv-becomes-muddied/

RBGW-pixel-structure.jpg


[koreatimes.co.kr]...Consumers warned against fake UHD TVs...http://www.koreatimes.co.kr/www/news/tech/2015/06/133_180933.html

--- Αυτόματη συγχώνευση μηνύματος ---

[prad.de]...Fake UHD LCD televisions with reduced Subpixel be marketed with UHD resolution...http://www.prad.de/new/tv/specials/Fake-UHD.html

μετάφραση google de to en
Calculation example

But we will nevertheless times concretely: When every second pixel consists only of a white subpixel instead of RGB subpixels, then arise for UHD following conditions:

3840 pixels x 3 = 11,520 subpixel subpixel at normal RGB structure.

(1920 pixels x 3 sub-pixels) + (1920 pixels x 1 subpixel) = 7680 in subpixel RGBW structure.

7,680 / 11,520 = 2/3 System.

In other words, a third of the sub-pixel is missing.

https://www.youtube.com/watch?v=hfIn5O-4hJU


 
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Λοιπον xavito, εχω σταματησει να κανω την καθημερινη ψακτικη μου.... μερα παρα μερα παταω today's posts και αν δω το username σου κανω ενα ελληνικο καφεδακι και ετοιμαζομαι για ενημερωση....:ears: Να σαι καλα φιλε! Ευχαριστουμε!
 
[hdtvtest.co.uk]...Faux-K: RGBW LED TV Spoils 4K UHD Resolution & Colour...http://www.hdtvtest.co.uk/news/rgbw-201510084189.htm

rgbw.jpg

Macro photo of the RGBW subpixel layout on an LED LCD TV


RGBW LED TV displaying 1-pixel 3840x2160 patterns

https://www.youtube.com/watch?v=JYGQOyU29P8

RGB LCD TV displaying 1-pixel 3840x2160 patterns
https://www.youtube.com/watch?v=YJDM8qr-ma8​

Fine text rendering at 3840x2160@60Hz 4:4:4 on RGBW vs RGB LED TVs
rgbw-text.jpg
rgb-text.jpg


Final Word

We’re confused by the purpose of an RGBW LED LCD TV. Yes, it can resolve 3840 pixels horizontally and 2160 pixels vertically (though not both at the same time), but that’s beside the point. The diluting effect of the additional white subpixel damages colour fidelity irreparably: by trying to shoehorn RGB video signals into an RGBW matrix, colour information is lost, and users will never be able to enjoy movies in the manner intended by the director.

At a time when ultra high-definition is just taking off, this sort of product does nothing to regain the trust of sceptical consumers who have been burnt by passing fads, planned obsolescence and limited upgrade path. To market an RGBW LED television as 4K Ultra HD is short-sighted, running counter to the industry’s shift in emphasis from more pixels to better pixels in the next phase of UHD development. An RGBW LED LCD TV may be cheaper, but you’ll be paying the ultimate price in the form of compromised picture quality.​
 
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