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VRR monitors are becoming ubiquitous, now VESA’s certification wants to make them good

VESA, the organization behind the benchmarks such as the DisplayPort interface, has a new certification program designed to help customers access monitors at the level of a modified update. Unlike its previous HDR certification program, which measured things like the highest brightness, the new one Adaptive-Sync Express Compliance Test Guidelines (or Adaptive-Sync Display CTS) is specifically designed to display a modified recovery rate, with defects such as flicker and discarded frames.

Virtual Reality Ratio (VRR) is a technology that allows displays to be adapted to the level of restore of any connected device, minimizing the appearance of visual arts, screen tearing, and alignment issues. When VRR support first appeared on graphics cards and monitors, it tended to connect with specific manufacturers: G-Sync for Nvidia and FreeSync for AMD. But in 2014, VESA built support for Adaptive-Sync DisplayPort 1.2a Based on the technology provided by AMD, it is now the ideal standard for graphic manufacturers in all three major industries: IntelAMD, and Nvidia.

Nvidia and both AMD they have long offered their own certification plans for VRR displays using their proprietary levels, but it is a lot of wild west when it comes to the open Adaptive-Sync standard. When Nvidia started testing Adaptive-Sync monitors back in 2019 as part of its G-Sync Compatible initiative, only 5.56 percent of the models it actually tested passed. Neither of them presented enough levels of adequacy or had other issues with image quality such as poor performance.

The new VESA certification is designed to provide similar guarantees for Sync-adapter support on a monitor or laptop. But unlike Nvidia or AMD certifications, it is an industry standard open source, and so on Test requirements are public.

“Obviously there are certain standards available to GPU vendors, but they have never announced the scope of their tests,” Roland Wooster, Intel engineer and VESA team leader who came up with her new test, told Zoom. . Take a look at the Nvidia website, for example, and you’ll see that the monitor needs to go through more than 300 tests to earn itself a G-Sync logo, but here’s a little bit about what these tests are. are. And that was produced some confusion In recent years, especially when it comes to terms such as “Lifelike HDR.”

With its certification, VESA tests Adaptive-Sync performance, rather than specific GPU standards such as FreeSync or G-Sync. For this reason, VESA expects its certification symbols to often sit with something similar. The G-Sync icon tells you how the monitor will work with the Nvidia GPU, but the VESA Adaptive-Sync logo can tell you how the monitor will perform on any Adaptive-Sync source.

Importantly, VESA Adaptive-Sync technology is available for its DisplayPort standard, which is used on monitors and laptops (including every time you transfer video via USB-C). Unfortunately, it will not help you to choose one of the growing numbers of TVs that support VRR in HDMI 2.1 where the standards are even higher in the wild west.

But, as well as being a public figure, Wooster suggests that VESA’s new certification level reflects a higher level than these specific vendor certifications. “We have seen some supervisors who have encountered those weak, confusing credentials, and not the kind of gray-haired we have here,” he said. In a follow-up email, he told me he expects less than half of Adaptive-Sync monitors in the market to meet VESA standards, similar to what Nvidia found when it introduced a unique certification for Adaptive-Sync displays.

According to the VESA certification, there are two adherence markers that providers can earn. MediaSync is for monitors you may use to watch videos or create content, while AdaptiveSync is for game monitors. If their device passes these tests, manufacturers are allowed to post labels related to the product box, web pages, or wherever they think potential customers can see them. The show that failed the tests could not use the logo, but the producers did not need to publicly declare the failure.

MediaSync brand, which focuses on video playback.
Photo: VESA

The AdaptiveSync logo is for game monitors.
Photo: VESA

The first of these two symbols is called MediaSync. The focus here is to ensure that monitors are able to replay video content – with less than 1ms of jitter – in each of the ten major global rankings (23.976, 24, 25, 29.97, 30, 47.952, 48, 50, 59.94), and 60fps – where 23.976 was mostly normal for American movie material). It sounds like a simple question, but 24fps content can have real problems when playing at 60Hz displays, because the packages do not evenly distribute the stimulus level on the screen. Three-two down it was a common way of dealing with the problem (where the first model was presented twice, three times a second, a third time twice, and so on), but it could create an unsatisfactory judge. The MediaSync feature means the monitor can use Adaptive-Sync to avoid such issues.

The second is the AdaptiveSync logo, which is designed for game monitors at the update level. For starters, a monitor with the AdaptiveSync brand needs to be able to operate at the highest level of 144Hz or higher for the native solution in the standard factory mode, and the adaptive upgrade level needs to able to slow down to 60Hz. That may not seem like a very low floor, but Wooster explains that if your frame rate goes down, up to 58fps for example, then the monitor is expected to use dual-mode to bring it up to 116fps, and back bring it back to normal. sync variation.

If the monitor can reach 144Hz then you will see the “Display 144” box to the right of the display icon, but Wooster told me that this number reflects everything the monitor is getting to the highest level – whether it is 144, 240, or 360Hz. – in the patriotic solution.

It is simply not enough to be able to present different types of structures. To be clear, the supervisor needs to do well. This means that the flicker level is not visible to the naked eye, even when the monitor structure is changing rapidly. It means not throwing snowballs – which can happen when the supervisor gives high-level support advice and the board actually supports it.

VESA also takes a detailed approach to how to measure response time, or the time it takes for the supervisor to update pixels. In the industry as a whole it is common for this to be seen as “gray to gray” at response time, or about the time it takes a pixel to convert to another gray shade. If response times are too slow, monitors may display “ghosting,” where the image residue is still visible on the screen as pixels struggle to keep up. To receive the AdaptiveSync signal, the monitor must have a response time of less than 5ms.

5ms may seem higher than the 1ms response times that many producers claim their supervisors can afford. But tests in the real world, e.g. those who do Rtingsresponse times are generally much longer than 1ms. Rtings generally classifies any response time less than 6ms as “good value.”

Manufacturers like to make these claims about 1ms response times because they are not as difficult on their test as independent reviews such as Rtings, or VESA testing centers. Some manufacturers, Wooster says, may make several gray-gray changes and then cherry-pick the best result. Others may take advantage of the fact that a warm panel can respond significantly faster than a cold one. Overdrive may be used to achieve a quick response on paper, but the cost of visual aids is ugly.

The solution for VESA is to measure the different gray-gray transitions (20 in total) and to take them on average, rather than cherry-producing the best result. Tests are performed at ambient temperatures between 22.5 and 24.5 degrees Celsius (72.5 – 76 Fahrenheit, and monitors are given time to reach a stable temperature first), and limit shots and shots are limited. that the supervisor is able to show and still pass.

Wooster declined to say how many VESA members he expects to pay for their equipment to eventually become MediaSync or AdaptiveSync certified (payment is the same if the show goes through or fails), but first certified supervisors must appear VESA network from today. He pointed to the current number of devices as one HDR certifications by VESA For example the amount of monitors and laptops we might eventually see with the new Adaptive-Sync brand.

Considering VESA’s bad list of members From the presentation industry, these little orange and blue labels can quickly become an important quality indicator when buying your next monitor or laptop.