Hvad definerer et godt Ultra HD-tv? UHD Alliancen mener, at de har svaret og med deres nye "UHD Premium" certificeringsprogram vil de kun lade de bedste tv-skærme på markedet bære deres logo.

Ultra HD Premium specifikation
UHD Alliance er skabt af tv-producenter, Hollywood-studier, indholdsdistributører og andre teknologiselskaber. Målet har været at skabe en “premium” specifikation til tv-skærme og andre led i den overordnede kæde for at sikre best mulig billedkvalitet.

På CES 2016 har UHD Alliance præsenteret specifikationer, der dækker over bl.a. opløsning, HDR, lysstyrke, sortniveau, farverum, farvepræcision og mere. Specifikationerne giver også anbefalinger hvad angår “immersive audio”.


Uafhængige testcentre rundt om i verden er blevet etableret for at certificere tv-skærme. De første tv-skærme, som vil bære logoet afsløres senere på ugen på CES i Las Vegas. Ud fra specifikationerne kan det dog allerede nu siges, at få - hvis overhovedet nogen - 2015-skærme vil opfylde kravene.

- “The criteria established by this broad cross section of the Ultra HD ecosystem enables the delivery of a revolutionary in-home experience, and the ULTRA HD PREMIUM logo gives consumers a single, identifying mark to seek out so they can purchase with confidence.” siger UHD Alliance.

Tekniske krav
I UHD Alliance’s egne ord:

The UHD Alliance has developed three specifications to support the next-generation premium home entertainment experience. The three specifications cover the entertainment ecosystem in the following categories:
Devices (currently, television displays, with other devices under consideration)
Distribution
Content

A high level overview of each technical specification can be found below.

 Devices:
 The UHD Alliance supports various display technologies and consequently, have defined combinations of parameters to ensure a premium experience across a wide range of devices. In order to receive the UHD Alliance Premium Logo, the device must meet or exceed the following specifications:
 Image Resolution: 3840x2160
 Color Bit Depth: 10-bit signal 
 Color Palette (Wide Color Gamut)
 Signal Input: BT.2020 color representation 
 Display Reproduction: More than 90% of P3 colors 
 High Dynamic Range 
SMPTE ST2084 EOTF 
A combination of peak brightness and black level either:
- More than 1000 nits peak brightness and less than 0.05 nits black level
OR
- More than 540 nits peak brightness and less than 0.0005 nits black level
 Distribution:
 Any distribution channel delivering the UHD Alliance content must support:
 Image Resolution: 3840x2160
 Color Bit Depth: Minimum 10-bit signal 
 Color: BT.2020 color representation
 High Dynamic Range: SMPTE ST2084 EOTF 
 Content Master:
 The UHD Alliance Content Master must meet the following requirements:
 Image Resolution: 3840x2160
 Color Bit Depth: Minimum 10-bit signal 
 Color: BT.2020 color representation
 High Dynamic Range: SMPTE ST2084 EOTF 
 Content Master:
 The UHD Alliance recommends the following mastering display specifications:
 Display Reproduction: Minimum 100% of P3 colors
 Peak Brightness: More than 1000 nits
 Black Level: Less than 0.03 nits 

The UHD Alliance technical specifications prioritize image quality and recommend support for next-generation audio.