IT House news on December 13 that the agency responsible for HDMI licensing confirmed to TFT Central that there was no problem for the display manufacturer to mark its HDMI 2.0 display as HDMI 2.1, but it was necessary to write down the enabled specifications.
TFT Central's investigation targeted Xiaomi's 24.5-inch 240Hz display released last month, which claims to have dual HDMI 2.1 interfaces.
However, Xiaomi marks the HDMI 2.1 with a small note following:
Due to the breakdown of HDMI certification standards, HDMl 2.1 is divided into two protocols: TMDS (bandwidth equivalent to the original HDMI 2.0) and FRL. The HDMl 2.1 interface of this product supports the TMDS protocol with a maximum resolution of 1920×1080 and a maximum refresh rate of 240Hz.
That said, the Xiaomi Mi 24.5-inch 240Hz monitor does not support FRL, and the FRL (Fixed Rate Link) transmission mode is exactly what the game needs to achieve high resolution + high frame rate display, so TFT Central questioned whether Xiaomi's writing method is appropriate.
▼ Comparison of functions of HDMI versions
TFT Central then contacted the HDMI Licensing Administrator to ask what exactly the specification for using HDMI 2.1 was. The response was that the HDMI 2.0 standard no longer existed and that manufacturers should change to HDMI 2.1 with a list of supported features.
HDMI 2.0 no longer exists, and the device should not claim v2.0 compliance because it is no longer referenced
The features of HDMI 2.0 are now a subset of HDMI 2.1
All new features and features related to HDMI 2.1 are optional (including FRL, higher bandwidth, VRR, ALLM, and everything else)
If the device claims to be HDMI 2.1 compliant, then they also need to indicate what features the device supports so as not to "confuse"
In other words, consumers can't just look at whether the product has an HDMI 2.1 label now, because it is likely to lack support for the game, and IT home netizens should also pay attention.