Jakarta, ONENEWS.MY.ID —
HDMI Forum, the entity responsible for publishing and licensing standards HDMI, will announce HDMI 2.1a at CES, January 5-8, 2022 in Las Vegas, United States.
HDMI 2.1a is the next generation of gadget ports, and will bring source-based tone mapping or SBTM. according to The Verge, SBTM enables better mixing of HDR and SDR content.
This means, if you have a Blu-ray player plugged into the TV and playing HDR content, the tone mapping for the HDR content will be done on the Blu-ray player, not on the television.
SBTM sounds a lot like TV-led or Player-led tone mapping powered by Dolby Vision.
Player-led tone mapping for Dolby Vision is usually the default option because it allows the TV or monitor to map the incoming signal to the display characteristics and produce the best picture quality.
However, some television sets and models, particularly Xbox Series consoles and older Sony televisions, support Player-led tone mapping for Dolby Vision, and perform tone mapping on the source device in an effort to reduce input latency and lag.
But generally provides lower image quality.
It seems that SBTM in HDMI 2.1a will work in a similar way and will likely have better results.
By becoming part of the HDMI specification, it will be accessible to all HDR standards, including HDR10 and HDR10+ without having to rely on Dolby Vision’s proprietary implementation.
However, it remains to be seen whether this feature has any salient advantages over existing display-based tone mapping techniques, citing GSM Arena.