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HDMI 2.1 spec released, ushering in new era of dynamic HDR video

30 November 2017

Dynamic HDR formats are also supported.

HDMI 2.1 is more a future-facing update than one that will directly affect current devices, seeing as we're still just starting to reach the point where 4K video is becoming commonplace, to say nothing of 8K resolution or technologies like dynamic HDR video that HDMI 2.1 in theory will be able to support. It features exceptionally low EMI (electro-magnetic interference) which reduces interference with nearby wireless devices. This new cable is backwards compatible with your existing installed base of HDMI devices. HDMI adopters will be notified when it is available.

HDMI 2.1 is compatible with 4K at 120Hz, 8K at 60Hz, and 10K resolutions for commercial A/V applications.

It introduces some major improvements over the predecessor, HDMI 2.0, such as improved bandwidth speed of 48Gbps, up from 18Gbps seen in the predecessor.

In order to fully utilize the HDMI 2.1 spec, you'll need to replace your existing HDMI cables with an Ultra High Speed HDMI Cable, which has been designed by the HDMI Forum.

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HDMI 2.1 also comes with eARC (Enhanced Audio Return Channel) support which supports most advanced audio formats such as Dolby Atmos and DTS X and provides a lossless audio experience compared to HDMI 2.0's ARC feature.

Much like FreeSync and G-Sync, the variable refresh rate tech baked into HDMI 2.1 should help decrease input latency and eliminate frame tearing. The HDMI Forum has also minimised the blank screens when switching sources with its Quick Media Switching (QMS) for movies and video.

Quick Frame Transport (QFT) reduces latency for smoother no-lag gaming, and real-time interactive virtual reality. Auto Low Latency Mode automatically sets the ideal latency setting for lag-free and uninterrupted viewing and interactivity.

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HDMI 2.1 spec released, ushering in new era of dynamic HDR video