ITU announces new HDR standard | 4K/UltraHD | News | Rapid TV News
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In a major advance for a technology that will inevitably boost uptake of Ultra HD services, the ITU has announced a new standard for high dynamic range (HDR) TV.

UHD LG screen 10 June 2016Building on the colour fidelity of ITU’s Ultra HD TV (UHDTV) Recommendation BT.2020, the ITU’s Radiocommunication Sector (ITU-R) has developed the new recommended standard in collaboration with experts from the television industry, broadcasting organisations and regulatory institutions in its Study Group 6.

The new HDR-TV recommendation details two options for producing High Dynamic Range TV images. The Perceptual Quantisation (PQ) specification is designed to achieve a wide range of brightness levels using a transfer function that is finely tuned to match the human visual system and the Hybrid Log-Gamma (HLG) specification which is constructed to offer a degree of compatibility with legacy displays by more closely matching the previously established television transfer curves. The recommendation also outlines a simple conversion process between the two HDR-TV options.

The ITU-R Recommendation BT.2100 also allows TV producers to choose from three levels of detail or resolution: HDTV (1920 by 1080), and 4K/Ultra HD (3840 by 2160) and 8K (7680 by 4320) – all of which use the progressive imaging system with extended colour gamut and range of frame-rates in ITU’s UHDTV Recommendation BT.2020.

“High Dynamic Range Television will bring a whole new viewing experience to audiences around the world,” said ITU secretary-general Houlin Zhao, welcoming the announcement. “TV programming will be enhanced with brighter pictures that add sparkle to entertainment and realism to news coverage.”

“High Dynamic Range Television represents an important step towards the virtual-reality quality of experience to be delivered by future broadcasting and multimedia systems,” added François Rancy, director of the ITU Radiocommunication Bureau.