Because even among authentic HDR TVs there are "grading" the quality of the implementation of a wide dynamic range, it is clear that the HDR marking are not the same between them. Thus, only a few 4K UHD TVs in 2015 had the necessary brightness levels of the dark and other technologies to be called HDR TVs.
К их числу относятся 4K телевизоры Sony Bravia 2015 года X850C, X900C, X930C и X940C. Также в списке модели 4K SUHD Samsung JS9500, JS9000 и JS8500. Тем не менее, в 2016 году появился совершенно новый стандарт HDR, названный «UHD Premium» (подробнее об этом ниже). Это результат разработок UHD Alliance (все эти компании являются обязательными его членами) в соответствии с высочайшими требованиями, и тот HDR, который присутствовал практически во всех телевизорах 2015 года уже не достаточно хорош.
Thus, in 2016 4K TVs HDR «UHD Premium» presented the flagship model of Samsung and Sony in 2015, SUHD JS9500 and Sony XBR-X940C, and a ruler in 2016 4K TVs from both companies. This model of Samsung KS-Series and 4K SUHD Sony XBR-XD Series 2016 Bravia TV companies such as X850D, X900D and X940D. It is worth noting that all of these TVs have already been mentioned in the article HDR or 4K - which is better.
The Vizio, however, actively contesting UHD Alliance standards and argues that only specification Dolby Vision, used in their 4K TVs Series Reference, really provide an excellent HDR standard. All 4K TV company P series in 2016 claimed as HDR, but Dolby Vision type, which does not depend on the new HDMI 2.0a connectivity specification for the transmission of 4K UHD content with the HDR-coded in 4K TVs.
4K OLED LG TVs, 4K TV TCL and content sources from companies like Roku and TCL, will also support the standard HDR Dolby Vision, without the need for HDMI 2.0a. In contrast, all other models 4K HDR TV mentioned above do offer HDMI 2.0a as a key parameter in the specification of his HDR.
In general, the situation is somewhat confusing, what standard HDR for any 4K TVs preferable. But the point is that in 2016 the majority of 4K TVs will be manufactured with a wide dynamic range of a particular type.
We have already briefly mentioned several different 4K standards with high dynamic range, and is a closer look at them. Currently, there are two dominant versions that are actually used in the consumer market 4K TV of some kind.
This Ultra HD Premium by UHD Alliance and Dolby Vision from Dolby Labs. In addition to these developed several other major definitions of the HDR, however, non-commercial use in consumer televisions. Here are the main features and characteristics of the two main standards HDR today.
The standards for each type of display device 4K and 4K UHD mainly televisions.
◦ Display resolution: at least 3840 x 2160 pixels
◦ Color Depth: 10-bit signal
◦ Color palette: Wide Color Gamut
◦ Input: color representation in BT.2020
◦ Display Coverage: more than 93% of the color spectrum DCI P3
◦ Wide Dynamic Range
◦ SMPTE ST 2084 EOTF (compliance with the standard electro-optical transmission)
◦ and peak brightness and deeper black level should either be more than 1000 nits, and nits, respectively, less than 0.05, or more than 540 nits, and nits less than 0.0005.
(This double standard - Contrast - most likely a direct sop OLED technology from the LG, which can not meet the high nit-level LCD / LED displays, but may completely overshadow them in terms of how realistic look dark place again redefining, thus, the range of which forms a contrast with deep HDR).
Televisions that will meet these standards a wide dynamic range and color during certification testing will receive the label «Ultra HD Premium». For Sony 4K TV it will own logo «4K HDR» compliance with the same standards.
Colour and Dolby Vision HDRI standards somewhat weaker, and at the same time, some harder than the UHD Alliance.
Nevertheless, it is an integral part of Dolby Vision, which is contained in the streaming content Netflix and Vudu 4K HDR, and is also used in TCL, Vizio and LG 4K HDR OLED TVs.
◦ Dolby aims at 12-bit color, and a whopping 10,000 nits of brightness for the masterpiece of cinematic content. While there is no intelligence driven to display options that can handle 10K bit and 12-bit color, so the content is permitted Dolby Vision 4K format yarns and 10-bit color, in particular for a broadcast component.
◦ For HDR displays that can not handle such content, but using Dolby Vision, can also be used values of peak brightness of 4000 nits. Thus, even HDR 4K TVs, which give 1000 nits of brightness or a little more (like most TVs HDR 2016 using a standard Dolby) can be regarded as satisfying the standard Dolby Vision.
◦ Dolby Vision requires additional modules inside the TV. This means that the standard can not be added by firmware updates can only be realized physically.
◦ Dolby Vision HDR requires HDMI 2.0a, and HDR-TVs with Dolby, such as models of Vizio Reference-Series do not support this technology.
◦ Dolby Vision also currently used for streaming content from Netflix HDR and Vudu, although both companies offer only a limited selection of HDR at the moment.
◦ Dolby Vision is currently used in the company Vizio 4K TVs in LG OLED TVs in all 4K UHD TVs HDR TCL.
As already mentioned, it is also being developed and other HDR standards. These include HDR10 standard open source and its own version of the HDR from the Technicolor, which is unique in that it will be able to transform the contents of the SDR in the HDR in 4K TV or other display device. However, these standards do not appear in any 4K UHD TV consumer market.
HDR has come for a long time. Today, it is beyond doubt, especially considering how this technology improves the home entertainment experience 4K - perhaps even to a greater extent than the resolution itself 4K UHD.
Yes, it is clear that the need to have a 4K TV with a wide dynamic range, and start working on it, you can now, especially since in 2016 have already appeared HDR standards. In addition, if you are planning to buy some 4K TV this year, then in any case it will be a model with the HDR standard, as virtually all new versions now come with this specification.
However, there is no need to rush, especially if you have a beautiful 4K UHD TV 2014 or 2015 with an earlier version of HDR, or even without it. 4K content as a whole is still far from the real state of growth, and most of your view will be scaled SD and the HD, which anyway is not available HDR.
In addition, HDR standards undergo a few changes so that you can simply wait until the dust settles, and still enjoy the impressions of the SDR 4K content viewing. The HDR 4K video can be beyond spectacular, but it does not mean that the usual 4K content is not worthwhile.
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