November 26, 2022

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HDMI 2.1a is expected to support SBTM

2 min read

HDMI 2.1a is expected to support SBTM, allowing the output source to generate optimized HDR signals.

 

HDMI 2.1a is expected to support SBTM, allowing the output source to generate optimized HDR signals.

 

As a mainstream high-definition multimedia interface, HDMI has recently fallen into a naming controversy similar to USB-IF, especially allowing manufacturers to “upgrade” HDMI 2.0 in place under certain circumstances.

 

For consumers, this will not only cause confusion in perception, but also loss of money and energy.

However, with the advent of the legendary “HDMI 2.1a” new standard, SBTM support is expected to dilute the negative impression caused by this incident.

 

TFT Central pointed out that information about HDMI 2.1a appeared on the page of the licensing authority briefly, but then mysteriously disappeared.

 

Although the official did not give any explanation, VideoCardz cleared the fog through the web cache of Google search.

 

It is reported that one of the important changes in HDMI 2.1a is the introduction of optional support for “source-based tone mapping” (SBTM for short).

 

HDMI 2.1a is expected to support SBTM, allowing the output source to generate optimized HDR signals.

(Screenshot via VideoCardz)

 

 

It is reported that SBTM is a novel wide dynamic range (HDR) function that allows the source device (rather than the display terminal) to perform part of the HDR mapping.

SBTM is also particularly useful when composing HDR/SDR video or images into a screen.

 

In addition, the official website of HDMI.org writes that SBTM enables PCs and game consoles to automatically generate optimized HDR signals to maximize the use of the display’s HDR function without the need for the user to manually configure the source device.

 

The ability to adapt to a multi-window environment will benefit gamers and PC enthusiasts even more-because the process allows separate windows to display SDR / HDR optimized content at the same time.

 

However, TFT Central added that SBTM cannot replace the current HDR technology (HDR10 / HLG and other formats), but to further improve the HDR experience by providing more optimized functions for HDR compatible devices.

 

 

 

 

HDMI 2.1a is expected to support SBTM, allowing the output source to generate optimized HDR signals.


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