HDMI cables are much needed in every single place, whether it’s to watch TV, play games or to use a projector. With the recent advancement in technology and Apple announcing its 4K TV, people are getting familiarized with the idea of 4K. But way before that on January 4, 2017 HDMI 2.1 was officially announced by the HDMI Forum and finally released on November 28, 2017! And they have a lot to boast about regarding the specs of HDMI 2.1.

One-upping the resolution game:

Not only 4K at 120Hz and 8K video at 60Hz, it also supports video at 10K resolution! In theory HDMI 2.1 will be able to support HDR Dynamic technology too. The ingenious thing is that it comes with backwards-compatible 48G Ultra High Speed HDMI Cable, which will support uncompressed HDMI 2.1 features. It will also allow manufacturers to integrate it into their devices.


  • Higher video resolutions


  • Dynamic HDR
  • eARC (simplifies connectivity, supports the most advanced audio formats and highest audio quality)
  • Enhanced refresh rate (Variable Refresh Rate, Quick Media Switching, Quick Frame Transport)
  • Auto Low Latency Mode (allows the ideal latency setting to automatically be set)
  • Compressed and uncompressed both modes are supported.

4K120A – supports uncompressed mode
4K120B – supports compressed mode
4K120AB – supports both
8K60A – supports uncompressed mode
8K60B – supports compressed mode8K60AB – supports both

For high performance and compatibility the Ultra High Speed HDMI cable is required for 8K/60 and 4K/120.

Images source: http://hdmiforum.org/
More information: https://www.hdmi.org/manufacturer/hdmi_2_1/