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Fortunately common sense has prevailed and the BBC and the Japanese public broadcaster NHK's research divisions have been able to bring the Dolby Vision and High Dynamic Range TV standards together in the International Telecommunications Union's BT.2100 : Image parameter values for high dynamic range television for use in production and international programme exchange. The Dolby vision was fundamentally designed for use in the cinema where viewing is in the dark and so added a lot of meta-data or control signals to the video. HDR was designed for the television market where there is ambient light in the viewing area. HDR does not use meta-data, HDR does require an increase in the maximum brightness of the screen to 2000 cd/m² so that the minimim brightness is about 0.1 cd/m² in the blackest part of the picture. This will allow a little light to be reflected from the screen. HDR is also much more compressable using h.265 or HEVC than Dolby Vision because Meta data is commands not image data. So for broadcast UHD, the UK already is using DVB-T2's higher data capacity so they will need to compress all signals using h.265 to give a similar number of programs/transmitter regardless of the definition. The BBC is demonstrating "UHD Trial of Planet Earth II in HDR" on line from now to early next year http://www.bbc.co.uk/rd/blog/2016-12-hdr-4k-uhd-iplayer-trial-planet-earth?utm_source=SMPTE%2FHPA+Email+Subscriber+List&utm_campaign=18c0585b10-Newswatch&utm_medium=email&utm_term=0_08becf377a-18c0585b10-267574377&mc_cid=18c0585b10&mc_eid=e7bdc5fc1e I do not know if this test is being goblocked. Alanh