Variable Refresh Rate (VRR)
HDMI® Variable Refresh Rate (VRR)
One of the highlights from the HDMI 2.1a specification’s multiple gaming and media features is Variable Refresh Rate. VRR reduces or eliminates lag, judder and frame tearing for more fluid and better detailed gameplay. VRR enables a gaming source such as a console or computer to deliver video frames as fast as it can, which in many cases is slower than the normal static refresh rate.
Graphics processors require different absolute periods to render each frame, and this time is dependent upon the complexity of the scene, the horsepower of the GPU, the resolution selected and the frame rate. When the GPU is taxed by the other three factors and does not finish rendering the next frame by the time it needs to be displayed, the source must either repeat the current frame or display the partially-rendered next frame, which causes judder and tearing.
By waiting until the next frame is ready to transport it, a smoother gaming experience can be provided to the user.
HDMI® Licensing Administrator, Inc. (HDMI LA) is the agent appointed by the HDMI Forum to license Version 2.1a of the HDMI Specification and is the agent appointed by the HDMI Founders to license earlier HDMI Specifications.
USAHDMI® Licensing Administrator, Inc.
550 S. Winchester Blvd,
San Jose, CA 95128, USA
Contact HDMI LA