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HDMI 2.1 Finalized – Up To 10K, Uncompressed 8K Video with HDR, QFT for Lower Latency


In early January, just ahead of CES 2017, the HDMI Forum shared the first official details on the HDMI 2.1 specification. It was supposed to be released in Q2 2017 but evidently, there was a delay.

Still, yesterday another press release shared the finalized details of HDMI 2.1 and confirmed that the spec is now available to HDMI 2.0 adopters. Most of what we knew is still true, with features like VRR and Dynamic HDR taking the center stage. However, there's also a promising new one called Quick Frame Transport which reportedly reduces latency for smoother, "no-lag" gaming.

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It should be noted that it'll be a while before we see any HDMI 2.1 display, though. Obviously, you'll be the first to know by staying tuned on Wccftech.

  • Higher video resolutions support a range of high resolutions and faster refresh rates including 8K60Hz and 4K120Hz for immersive viewing and smooth fast-action detail. Resolutions up to 10K are also supported for commercial AV, and industrial and specialty usages.
  • Dynamic HDR support ensures every moment of a video is displayed at its ideal values for depth, detail, brightness, contrast and wider color gamuts—on a scene-by-scene or even a frame-by-frame basis.
  • The Ultra High-Speed HDMI Cable supports the 48G bandwidth for uncompressed HDMI 2.1 feature support. The cable also features very low EMI emission and is backward compatible with earlier versions of the HDMI Specification and can be used with existing HDMI devices.
  • eARC simplifies connectivity, provides greater ease of use and supports the most advanced audio formats and highest audio quality. It ensures full compatibility between audio devices and upcoming HDMI 2.1 products.
  • Enhanced refresh rate features ensure an added level of smooth and seamless motion and transitions for gaming, movies and video. They include:
    • Variable Refresh Rate (VRR) reduces or eliminates lag, stutter and frame tearing for more fluid and better detailed gameplay.
    • Quick Media Switching (QMS) for movies and video eliminates the delay that can result in blank screens before content is displayed.
    • Quick Frame Transport (QFT) reduces latency for smoother no-lag gaming and real-time interactive virtual reality.
  • Auto Low Latency Mode (ALLM) allows the ideal latency setting to automatically be set allowing for smooth, lag-free and uninterrupted viewing and interactivity.

The HDMI 2.1 Compliance Test Specification (CTS) will be published in stages during Q1-Q3 2018, and HDMI adopters will be notified when it is available.


Feature FAQS

High Video Resolutions

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Q: Will 8K@60 or 4K@120 require a new cable? 
A: Yes, in order to ensure performance and compatibility the Ultra High Speed HDMI Cable is required.

Q: What are the supported resolutions and frame rates? 

  • 4K50/60
  • 4K100/120
  • 5K50/60
  • 5K100/120
  • 8K50/60
  • 8K100/120
  • 10K50/60
  • 10K100/120

Q: Is compression used to achieve those resolutions and frame rates? 
A: The specification supports both uncompressed and compressed modes. Manufacturers can implement either or both modes. The designations are:

  • 4K120A – supports uncompressed mode
  • 4K120B – supports compressed mode
  • 4K120AB – supports both
  • 8K60A – supports uncompressed mode
  • 8K60B – supports compressed mode
  • 8K60AB – supports both