VESA Toughens DisplayHDR Performance Specifications
The Video Electronics Standards Association (VESA) said this week that it has updated the DisplayHDR Standard with bringing tighter compliance specifications and a new DisplayHDR 1400 performance level for 4K/HDR monitors and displays.
The first major update to the VESA High-Performance Monitor and Display Compliance Test Specification (DisplayHDR), labeled DisplayHDR version 1.1, adds tougher performance criteria for luminance and color gamut, as well as new test requirements, such as for active dimming, to address recent advances in HDR technology, the association said.
Companies can begin certifying their display products under the new DisplayHDR 1.1 spec immediately, but VESA added that it will continue to allow products to be certified under the previous DisplayHDR 1.0 spec through the end of May 2020. This is being done “to allow for products already in development that have been designed to meet the original spec, which was published in November 2017,” VESA explained.
VESA said the newly announced updates to its specification program reflect “the continued strong momentum for the DisplayHDR standard.”
The groups said its DisplayHDR program continues to grow, and now numbers more than 125 certified display models under its logo certification.
VESA also announced that it has added a new 1400 performance level to the DisplayHDR standard, which targets professional content creators.
Compliance with DisplayHDR 1400 level requires a dynamic contrast ratio that is 3.5X greater than the DisplayHDR 1000 level. DisplayHDR 1400 provides a 40% increase in luminance and a 2.5X reduction in black level compared to the DisplayHDR 1000 tier. In the process, contrast range is increases 350%.
At the same time, the 1400 level increases color gamut performance requirements from 90% to 95% of DCI-P3-D65. The group said this creates “a visibly noticeable difference compared to the 500/600/1000 tiers.”
Another key feature of the new DisplayHDR 1400 tier is a 900 nits of brightness criteria for full-screen long-duration (30 minute) testing, which VESA said “provides for a rock-solid stable luminance-based display for professional and prosumer video editing.”
Asus is demonstrating the industry’s first pre-certified display for the DisplayHDR 1400 specification at IFA 2019, being held in Berlin, Germany beginning Friday.
The Asus ProArt Display PA32UCG is said to display 1000 nits full screen, providing consistency while mastering. The display also hits a 1600 nits peak, which is useful in preparing images for tone mapping.
Meanwhile, VESA published key performance updates for the DisplayHDR 1.1 specification including the following criteria:
• Active dimming — DisplayHDR now mandates active dimming performance levels, a feature that when adopted in displays can reduce power consumption and yield significantly darker black levels
• DisplayID accuracy — ensures that accurate luminance and color gamut data is populated in the DisplayID or legacy Extended Display Identification Data (EDID), which enables the GPU to optimize the video signal for that display to ensure the highest display performance
• Dual corner box test — the black-level test has been updated with larger corner box structures to allow for accurate colorimeter measurement of both black and white levels, resulting in improved dynamic contrast ratio testing
• New color gamut specifications — DisplayHDR now includes a 10 percent color patch test in addition to the 100 percent full screen color test, with both tests now using the display’s maximum luminance and RGB primary color values from the DisplayID/EDID; this revised test method more accurately determines the color gamut that will render on the display when running Windows
• Combined color luminance — DisplayHDR has added a mechanism to validate full color volume at the full logo level luminance
• New Delta-ITP test — added to test that the luminance level on the display is correctly rendered, helping to ensure the faithful reproduction of the original content creator’s intent (luminance, and D65 white balance)
• On-screen display (OSD) mode indication — any DisplayHDR-certified monitor with an on-screen menu function must now clearly indicate which modes support DisplayHDR, making it easier for users to optimize their display settings
• DisplayPort certification specification — any DisplayHDR-certified monitor that has a DisplayPort interface must also undergo DisplayPort certification, ensuring that the display performs optimally with VESA DisplayPort-certified cables and other peripherals
“Since we launched the DisplayHDR compliance test specification nearly two years ago, display manufacturers have made excellent progress in refining the performance and capabilities of their HDR displays beyond what was originally defined in the standard. To represent the gains that the display ecosystem has made in that time, VESA has updated the DisplayHDR standard with substantially tighter performance metrics,” stated Roland Wooster, chairman of the VESA task group responsible for DisplayHDR, and the association’s representative from Intel Corporation for HDR display technology. “While systems that already received DisplayHDR certification under the existing 1.0 spec are not required to recertify their products under DisplayHDR version 1.1, we believe that many of the systems that passed the original spec will also pass the new 1.1 spec. Going forward, we expect that the majority of new devices will be certified to DisplayHDR 1.1, resulting in an even greater and more consistent HDR experience for consumers.”
By Greg Tarr
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