What is HDR and what is it used for on 4K TVs?

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Aina Martin
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What is HDR and what is it used for on 4K TVs?

Comparison between this and the other two formats on the market

The televisions with HDR supplied have a price now within everyone's reach, and are becoming the most adopted standard. Devices that take advantage of HDR in combination with 4K show clearly better images than their counterparts that do not.





What's the reason? What exactly is HDR, and why is it worth spending more than the penultimate generation TVs?

HDR, O "High Dynamic Range", it pretty much does what its name implies: it increases the color gamut and contrast achievable by a TV compared to the competition.

This feature, however, should not be confused with HDR photos that can be taken with any mobile phone. While the final effect is the same, HDR on mobile is achieved by combining multiple images to emphasize the colors of a single image, while HDR on a television is a color specification that applies to video.

Do you want to buy a cutting-edge TV, compatible with the new standards? Here's where you can do it

Basically, HDR for TV makes blacks blacker, whites whiter, and any other colors in between significantly more vibrant than they otherwise would have been. The effect is especially noticeable when two TVs are placed side by side, and once you notice the difference it's very hard to want to go back.

At the moment, the most popular version of HDR on most TVs is called HDR 10, with the "10" referring to the 10 bits of color (i.e., 1 billion colors) that HDR is capable of showing. Remember the times of the wars between VHS formats against Betamax or Blu-Ray against HD-DVD? even today we are witnessing technologies that wage war in order to be able to win the satisfaction (and money) of consumers.

And therefore, also in this field we have a competitor, the Dolby Vision, which does pretty much the same thing as HDR 10, but in addition adds scene-by-scene dynamic coloring. While the two technologies are pretty much the same (both offer better contrast between dark and light while enhancing color), Dolby Vision allows cinema workers and colorization practitioners in the film industry to dynamically change the level. of HDR applied to each scene, rather than letting a single color scheme always be the same throughout the show or throughout the movie.



Another important distinction is that while TVs equipped with Dolby Vision are backward compatible with HDR 10 (and therefore capable of showing both types of content), TVs that are compatible with HDR 10 can only handle that format.


To complicate the picture, the work of Samsung, Panasonic e 20th Century Fox, the format HDR10 +, created both to bridge and possibly overcome the HDR10 gap, and to avoid paying license fees to Dolby Laboratories.

With HDR 10 + dynamic metadata are conveyed on all the frames that make up the scene: in this way the TV is able to optimize the brightness in the best possible way. Furthermore, the brightness level achievable with HDR10 + is 4 times higher than the "old" format (4.000 nits against 1.000).

These are technical data that leave some time they find with respect to practical tests. Basically: do you see Dolby Vision or HDR10 + content better? Comparisons made by famous specialized sites leave no room for doubt: the two formats are practically on the same level.


Who will win, therefore, as support from the producers of Led panels? Considered that the standard HDR10 + and open and unlicensed (unlike Dolby Vision), we think there will be no story between the two. Time will be the best judge.

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