ITU okays another TV spec

The ITU's added another high dynamic range (HDR) option to UHD TV recommendations.

The ITU-R HDR-TV Recommendation BT.2100 announcement is couched in the kind of terms usually reserved for people selling $10,000 hi-fi cables, with the standards body saying HDR “can make outdoor sunlit scenes appear brighter and more natural, adding highlights and sparkle. It enhances dimly lit interior and night scenes, revealing more detail in darker areas, giving TV producers the ability to reveal texture and subtle colours that are usually lost with existing Standard Dynamic Range TV”.

Aren't you glad they care?

There are two HDR options on offer for producers: The Perceptual Quantization (PQ) specification (for maximum brightness range) and the Hybrid Log-Gamma (HLG) specification (maximising compatibility with legacy displays); naturally, the spec includes a conversion process between the two.

BT.2100 supports 1920x1080 HDTV, 3840x2160 4K, and 7680x4320 8K resolution.

The ITU announcement is here. ®


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