Most recent 4K Ultra HD televisions support high dynamic range (HDR) through standards such as HDR10, Dolby Vision, or Hybrid Log-Gamma (HLG). Samsung and Amazon have jointly introduced an update to HDR10 with HDR10+ that adds dynamic tone mapping & metadata.
The companies describe the issues for HDR10′ static metadata as follows:
The current HDR10 standard utilizes static metadata that does not change during playback despite scene specific brightness levels. As a result, image quality may not be optimal in some scenes. For example, when a movie’s overall color scheme is very bright but has a few scenes filmed in relatively dim lighting, those scenes will appear significantly darker than what was originally envisioned by the director.
HDR10+ will be able to adjust metadata for each scene, and even for each frame, hence solving the issue of darker scenes. If you already own a Samsung TV with HDR10, it’s not already outdated, as all 2017 UHD TVs already support HDR10+, and 2016 UHD TVs will support HDR10+ through a firmware update.
Amazon Video will be the first streaming service to deliver HDR10+ content, and Samsung also collaborated with other companies to integrate HDR10+ into products such as Colorfront’s Transkoder for post-production master, and MulticoreWare x265 video encoder.
HDR10 – and HDR10+ – is also said to be an open standard, but it could not find the specifications online, and only managed to find that HDR10 Media Profile main must support EOTF: SMPTE ST 2084, 4:2:0 color Sub-sampling, 10-bit color depth, ITU-R BT.2020 color primaries, and SMPTE ST2086, MaxFALL and MaxCLL metadata defined in CTA 861.3-A standard (free preview) which you can purchase for $67. There must be some sort of CTA Standard for HDR dynamic metadata extensions for HDR10+, but I could not find anything [Update: Maybe SMPTE ST 2094-20-2016?]
Samsung showcased a static vs dynamic tone mapping demo at NAB 2016 last year, but it’s quite hard to see any differences in the video.