VESA introduces certification for Adaptive Sync

Adaptive Variable Refresh Rate (VRR) is a common technique for dynamically updating the screen refresh rate according to how many frames the graphics card renders. One of the most common variants is VESA’s standard Adaptive Sync, which has been integrated into the Displayport standard since version 1.2a.

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Both AMD and Nvidia have their own VRR methods – Freesync and G-Sync respectively. Both have certification processes which means that screen manufacturers must have their products approved in order to market them as compatible. For Adaptive Sync, the corresponding certification process is lacking to ensure that screens with the support actually work as intended, something VESA is now going to change på.

Because Adaptive Sync is an open standard, so are VESA’s criteria for the certification process openly available. Manufacturers can apply to certify their products according to two categories – Mediasync and Adaptivesync. The former is for screens intended for, for example, viewing and creating video content, while Adaptivesync is a certification for game-oriented screens.

To qualify as Mediasync certified, the screen must be able to play video content in less than 1 millisecond jitter in the ten most internationally used standards for frame rate in film and video. It ranges from 23.976 to 60 FPS.

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Adaptivesync sets requirements more tailored to gaming performance. To meet the certification requirements, the monitor must have an image refresh rate of at least 144 Hz. It must be possible to reach the maximum frequency when the screen is running with the panel’s actual resolution and factory settings. In addition, the adaptive refresh rate must reach down to 60 Hz.

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In order to obtain the certification, not only must the requirements be met – it must also be done with approved performance. If the screen during the tests has visible problems with, for example, flicker, no certification is awarded. VESA also includes requirements for response time, where, for example, a lot of ghosting can result in an unapproved result. To be allowed to use the Adaptivesync label, a response time of a maximum of 5 milliseconds applies.

The purpose of the certification is partly to make it easier for consumers to see which screens are compatible, and partly to guarantee that those screens can deliver an approved minimum level in terms of performance.

Do you use VRR?


Source: SweClockers by www.sweclockers.com.

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