What may HDMI 2.1a Bring to us?

HDMI 2.1a is scheduled to be announced at CES 2022 on January 5th. The following year. HDMI is the most current version of the upgraded version of the in-use HDMI 2.1 standard and will include the brand new SBTM feature.


What is SBTM?

The important upgrade, SBTM (Source-Based Tone Mapping), allows different windows to show SDR or HDR content, including picture-in-picture video or window playback. It is not designed to replace the well-known HDR10 and Dolby vision effects. The SBTM function can automatically create optimized HDR signals that make more efficient usage of the HDR function of the display, without the requirement for users to manually adjust it that can enhance the gaming experience for PC. SBTM eliminates overexposed areas from the official image, making the details more visible (shown below).


sbtm feature HDMI 2.1a


While it might sound like a great idea, concerns have been raised in some tech reviews since the company behind HDMI connection plans to integrate HDMI 2.0 with HDMI 2.0 and the HDMI 2.1 version. It could confuse when deciding the compatibility of a monitor. Also, by the guidelines that are set by the HDMI Licensing Administrator who is responsible for releasing licenses and issuing HDMI standards, when the brand new 2.1a “standard” is removed, and all unused ports are released, they must be identified as HDMI 2.1a however they are not even a single attribute in that 2.1a standard.


HDMI 2.1 VS HDMI 2.0


HDMI 2.1 upgrade


HDMI is among the well-known audio and video interface in the audio-visual sector that covers a variety of fields like TV PC, monitor, mobile phones, and many more. The standard for HDMI is also being upgraded by a number of years from 2.0 and now 2.1. While it was announced that the HDMI 2.1 standard had been made available in the year 2017 because of the low popularity of high-resolution, high-refresh video, TVs that were equipped with HDMI 2.1 were not made public until the close of 2019.

HDMI 2.1, also known as the HDMI 2.1 standard, which was created in the year 2017, is a technological standard that will allow high-end videos and audio transmission in the near future. The most significant distinction between HDMI 2.1 as well as HDMI 2.0 is bandwidth, which went from 18 Gbps to 48 Gbps. The increased bandwidth leads directly to an improvement in the quantity of transmitted data.

Furthermore, HDMI 2.0 cannot support an 8K video transmission. However, HDMI 2.1 can help 4K at 120Hz and 8K at 60Hz. HDMI 2.1 can support dynamic HDR, and HDMI 2.0 only supports static HDR. Furthermore, HDMI 2.1 supports VRR (variable refresh rate). To play games, cut down or eliminate screen delays or tearing, stuttering, or tearing to give you smoother full details.

Additionally, HDMI 2.1 supports ALLM (automatic low latency mode). In the manner that is mechanical low-latency Smart TV, users are not required to change the low-latency mode manually, according to the content on the TV. However, they can automatically turn off or enable the low-latency mode based on the contents of the TV. You can enjoy smooth, non-stutter continuous viewing and interaction.


Author’s Thoughts

When the article was written, Easybom had found that the HDMI Licensing Administrator had removed all SBTM content, including the sample image on its official website-HDMI.org. Let’s find out what’s hiding beneath the surface of the entire “mess.”

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