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Guru3D.com » News » VESA Defines DisplayHDR version v1.0 Standard

VESA Defines DisplayHDR version v1.0 Standard

by Hilbert Hagedoorn on: 12/12/2017 08:50 AM | source: | 10 comment(s)
VESA Defines DisplayHDR version v1.0 Standard

The Video Electronics Standards Association (VESA) announced it has defined the display industry's first fully open standard specifying high dynamic range (HDR) quality, including luminance, color gamut, bit depth and rise time, through the release of a test specification. 

The new VESA High-Performance Monitor and Display Compliance Test Specification (DisplayHDR) initially addresses the needs of laptop displays and PC desktop monitors that use liquid crystal display (LCD) panels. The first release of the specification, DisplayHDR version 1.0, establishes three distinct levels of HDR system performance to facilitate adoption of HDR throughout the PC market. HDR provides better contrast and color accuracy as well as more vibrant colors compared to Standard Dynamic Range (SDR) displays, and is gaining interest for a wide range of applications, including movie viewing, gaming, and creation of photo and video content.

VESA developed the DisplayHDR specification with the input of more than two dozen active member companies. These members include major OEMs that make displays, graphic cards, CPUs, panels, display drivers and other components, as well as color calibration providers. A list of participating companies is available at www.displayhdr.org.

DisplayHDR v1.0 focuses on LCDs, which represent more than 99 percent of displays in the PC market. VESA anticipates future releases to address organic light emitting diode (OLED) and other display technologies as they become more common, as well as the addition of higher levels of HDR performance. While development of DisplayHDR was driven by the needs of the PC market, it can serve to drive new levels of HDR performance in other markets as well.  

Brand Confusion Necessitates Clearly Defined HDR Standard
HDR logos and brands abound, but until now, there has been no open standard with a fully transparent testing methodology. Since HDR performance details are typically not provided, consumers are unable to obtain meaningful performance information. With DisplayHDR, VESA aims to alleviate this problem by:

  • Creating a specification, initially for the PC industry, that will be shared publicly and transparently;
  • Developing an automated testing tool that end users can download to perform their own testing if desired; and
  • Delivering a robust set of test metrics for HDR that clearly articulate the performance level of the device being purchased.

What DisplayHDR Includes 
The specification establishes three HDR performance levels for PC displays: baseline (DisplayHDR 400), mid-range (DisplayHDR 600) and high-end (DisplayHDR 1000). These levels are established and certified using eight specific parameter requirements and associated tests, which include:

  • Three peak luminance tests involving different scenarios – small spot/high luminance, brief period full-screen flash luminance, and optimized use in bright environments (e.g., outside daylight or bright office lighting);
  • Two contrast measurement tests – one for native panel contrast and one for local dimming;
  • Color testing of both the BT.709 and DCI-P3 color gamuts;
  • Bit-depth requirement tests – these stipulate a minimum bit depth and include a simple visual test for end users to confirm results;
  • HDR response performance test – sets performance criteria for backlight responsiveness ideal for gaming and rapid action in movies by analyzing the speed at which the backlight can respond to changes in luminance levels.

"We selected 400 nits as the DisplayHDR specification's entry point for three key reasons," said Roland Wooster, chairman of the VESA task group responsible for DisplayHDR, and the association's representative from Intel Corp. for HDR display technology. "First, 400 nits is 50 percent brighter than typical SDR laptop displays. Second, the bit depth requirement is true 8-bit, whereas the vast majority of SDR panels are only 6-bit with dithering to simulate 8-bit video. Finally, the DisplayHDR 400 spec requires HDR-10 support and global dimming at a minimum. With this tiered specification, ranging from baseline to high-end HDR performance levels, PC makers will finally have consistent, measurable HDR performance parameters. Also, when buying a new PC, consumers will be able to view an HDR rating number that is meaningful and will reflect actual performance."

"Developing this specification is a natural expansion of our range of video standards," said Bill Lempesis, VESA executive director. "Moreover, we are the first standards body to develop a publicly available test tool for HDR qualification, utilizing a methodology for the above-mentioned tests that end users can apply without having to invest in costly lab hardware. Most of the tests require only a colorimeter, which many users already own. Ease of testing was a must-have requirement in order to make DisplayHDR a truly viable, consumer-friendly spec."



VESA Defines DisplayHDR version v1.0 Standard




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sverek



Posts: 6074
Joined: 2011-01-02

#5500369 Posted on: 12/12/2017 09:05 AM
Glad HDR finally got a standard. Can't understand specific details, but hopefully it's high enough to force makers produce better panels.

fantaskarsef
Senior Member



Posts: 12049
Joined: 2014-07-21

#5500375 Posted on: 12/12/2017 09:27 AM
Yes, it's good that there's finally something to hold on to for buyers if they are looking for a "HDR certified" and not just "capable" or "compatible" screen / tv.
I also wonder how many TVs that used to have HDR somewhere on their box are actually NOT HDR capable :D

pato
Senior Member



Posts: 162
Joined: 2003-08-25

#5500394 Posted on: 12/12/2017 10:38 AM
About time, good news for Laptop and PC users :)

shalafi
Member



Posts: 26
Joined: 2016-06-08

#5500420 Posted on: 12/12/2017 11:40 AM
Yes, it's good that there's finally something to hold on to for buyers if they are looking for a "HDR certified" and not just "capable" or "compatible" screen / tv.
I also wonder how many TVs that used to have HDR somewhere on their box are actually NOT HDR capable :D

I would guess all of the low-end ones and a lot of mid-range ones. The minimum brightness is defined as 400 nits (cd/m2), most of these TVs have 350 nit panels (and no real local dimming as well).

nevcairiel
Senior Member



Posts: 744
Joined: 2015-05-19

#5500452 Posted on: 12/12/2017 01:35 PM
400 nits isn't really a whole lot. Its also not the first certification for HDR devices, in the consumer TV space we already have "UHD Premium" which requires either 1000 nits with an average black level (for LCDs), or a supreme black level with min. 540 nits (OLEDs) - on top of that UHD Premium requires 10-bit - and of course UHD.

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