HDR: An amazing technology that a lot of people don't know about. Everything you need to know about HDR in computer monitors

A list of the best 4K gaming monitors for the Xbox One S console with HDR10 support, for those who don't want to play the console on their TV.

Basic parameters of 4K-HDR monitors.

• HDR10- Only this format is supported by Microsoft Xbox consoles. Availability Dolby Vision will in no way improve the picture of games. Also, not any mention of HDR in the description of the device means support for the desired format.
• Diagonal from 24″, but 27″-32″ is better . It is possible to play console games at a smaller size, but there is little pleasure.
• IPS matrix much better in terms of juiciness and saturation of the picture, while TN has a short response time. On this moment IPS displays fast enough.
• Refresh rate 60 Hz, sometimes more. Here the rule applies: the more the better, but more expensive!
• Response time up to 12ms, up to 30 ms acceptable imput-lag for TV. The lower the delay value, the better.
• HDMI input 2.0 or 2.0a, otherwise 4K will be at 30Hz and not at 60Hz.
• 10bit monitors (1.07 billion colors) and more, because only in this case you will get all the beauty of HDR. 8bit display 16.7 million colors. 8bit+FRC is software methods increase in bit depth (pixels blink and because of this, the number of color shades increases).
• We recommend that you pay attention to monitors with Freesync 2 through HDMI port, since this feature is supported by the Xbox One X.

Monitor models with HDR 10 for Xbox One S and X.

In mid-2017, not many monitors actually support the HDR10 profile, which is required for the new Microsoft Xbox One consoles with S and X indexes:

• LG 32UD99-W(31.5″ / IPS / 4K / 60Hz / HDR10 / FreeSync) - $999
• Dell UltraSharp UP2718Q (27″ / IPS / 4K / 60Hz / HDR10) - $1.699
• Acer Predator XB272-HDR (27″ / IPS / 4K / 144Hz / HDR 10 / G-Sync) - $1.999 (estimated)
• Asus ROG SWIFT PG27UQ (27″ / IPS / 4K / 144Hz / HDR 10 / G-Sync) - $1.999 (estimated)
• ASUS ProArt PA32U (32″ / IPS / 4K / 60Hz / HDR 10) - $1.999 (estimated)

For full HDR-10, you need a huge brightness of 1000 nits.

Of course, not everyone wants to shell out more than a thousand dollars for a monitor, especially for a game console. But if you combine games with work (photo and video editing), then you can fork out. And not everyone will need a huge 4K-UHD TV, which also starts at $1,500.

Additional technologies NVidia and AMD.

• G-SYNC- NVIDIA development for dynamic synchronization between the display and the video card (eliminates gaps - "tearing" and increases the smoothness of frames). Works only with NVIDIA video cards and significantly increases the cost monitors due to royalties, an average of 20.000₽.
• freesync- a similar development from AMD, for fast and clear image updates. Supported by VESA and Display Port 1.2a. Widely used by all monitor manufacturers because of its free! Works with AMD GPU cards (discrete and built-in CPU).

What is better 4K monitor or 4K TV?

To answer this question, you need to decide what the device will be used for.

With many equal technical parameters (diagonal, resolution, contrast, brightness, response speed, refresh rate, etc.), there is one difference between these displays - purpose.

• TVs are suitable for watching movies, TV, streaming services and games on consoles. Since they are specially made to display a "beautiful" picture over a large area.
• The monitor needs to show most realistic image, without "improvers" and "uplavnyalok". Therefore, they are used in conjunction with computers and other working installations. Gaming monitors are also only relevant for PC gamers, as consoles don't go over 60FPS at 1080p, let alone 4K.

Ideally, it is best to have both options, a good monitor for work, and a large TV for entertainment. But if the budget or space of the living space is limited, then you will have to prioritize.

The manufacturing industry is developing with high speed. Every year at exhibitions, manufacturers present Newest technologies to improve TVs and convince people it's time for an upgrade.

Evolution

The last few years have taken us from CRT models to thin TVs. There was a rise of plasma panels and their fall. Then came the era of high definition, full support for HD and Ultra HD. There were experiments with the popular three-dimensional format, as well as with the shape of the screen: it was made either flat or curved. And now a new round of this television evolution has come - TVs with HDR. It was 2016 that became a new era in the television industry.

on TV?

This abbreviation stands for "extended dynamic range". The technology makes it possible to bring the created picture closer to what a person sees in real life with maximum accuracy. By itself, our eye perceives a relatively small number of details in the light and in the shadows at one time. But after the pupils adapt to the current lighting conditions, their sensitivity almost doubles.

Cameras and TVs with HDR: what's the difference?

In both types of technology, the task of this function is the same - to convey the world around with maximum reliability.

Due to the limitations of camera matrices, several shots are taken with different exposures. One frame is very dark, another is a little lighter, two more are very light. All of them are then connected with special programs manually. An exception is cameras with a built-in frame stitching function. The meaning of this manipulation is to pull out all the details from the shadows and light areas.

Manufacturers have made HDR-enabled TVs focused on brightness. So, ideally, the device should be capable of outputting a value of 4000 candelas per square meter at an arbitrary point. But at the same time, the detail in the shadows should not be overwhelmed.

What is HDR for?

by the most important parameters for the quality of the displayed picture are color accuracy and contrast. If you put a 4K TV next to an HDR TV that has better color reproduction and increased contrast range, then most people will opt for the second option. After all, on it the picture looks less flat and more realistic.

HDR TVs have increased gradation, which allows you to get more shades of various colors: red, blue, green, as well as their combinations. Thus, the point of models with HDR is to display a more contrast and full-color picture than other TVs.

Possible problems

In order to fully enjoy all the advantages of technology, unfortunately, you need not only TVs with HDR, but also content that will match the technology. In principle, TVs with an extended dynamic range of the image are already doing quite well. The brightness of the models has been doubled, and the illumination has become local and direct, that is, different fragments can be highlighted with different brightness in one frame. The one with HDR isn't exactly cheap. Its cost is about 160 thousand rubles. This model is a Sony TV. With HDR, there are 55-inch and 65-inch screens. Unfortunately, budget models have insufficient peak brightness, and the backlight in them does not regulate arbitrary areas of the matrix. They also have a very modest number of transmitted shades of colors.

The difficulty with using old models is that the effect can be the opposite of what the director intended when shooting his creation. After all, together with the colorists, a color scheme was developed, and the frames were painted using an extensive palette of colors provided by a special standard in cinema. Previous TVs with this standard do not work, as they are not able to display some shades. That is why television versions of films look more pale than they should.

The new HDR-enabled TVs can change the color scheme in any way they want, using their own algorithms that are unaware of the director's vision. For this reason, the creators came up with a technology in which, together with the video signal, special metadata is transmitted containing information with algorithms for changing the picture for TVs with the HDR function. Now the device knows where to lighten and where to darken, as well as at what points to add some kind of tint. And if the TV model supports such features, then the picture will look exactly the way the director wanted.

Content Coming Soon

Currently, HDR TVs have a negligible amount of content. So, only a few titles are provided by online video services, and the last episode of the Star Wars movie was filmed and edited in a format similar to HDR. Because of this, the opinion may form that there is no point in buying TVs that support high dynamic range.

However, it is not. There are companies that provide the ability to convert video content to pseudo-HDR. Of course, this is not done by pressing a single button, which will instantly improve the image in automatic mode without any outside help. But there is a set of utilities that will greatly facilitate the work associated with the restoration of the director's and colorists' plans. color scheme. And this means that over time, the volume of high-quality content will increase.

HDR Options

As with previous HD and Blu-Ray technologies, there are several opinions about how things should be implemented. Therefore, HDR was divided into formats. The most common format is HDR10. It is supported by all TVs with HDR. IN this format the entire metadata is attached to the video file.

The next option is Dolby Vision. Here each scene is processed separately. This makes the picture look better. In Russia, this option is supported only by TVs from LG. There are no players with its support yet, since modern models are weak, and their processors cannot pull such a load. Owners of models with HDR10 with the release of updates will receive video processing close to DV.

Requirements

In 2016, HDR TVs began to hit the market in droves. Almost every 4K capable device can understand this format. But, unfortunately, understanding is one thing, and displaying it correctly is another.

The ideal option is a TV with an OLED matrix and support for 4K, which is able to make any pixel as bright as possible or darken it. Also suitable are models with LED carpet backlighting, which individually or in groups adjust the brightness of their matrix areas.

Update

If your TV supports HDMI 2.0 technology, then there is a very high probability that in the near future you will receive software update to a new standard that is needed in order to transfer metadata. These two standards are fully compatible physically. The only difference is in the way software processing video stream.

How can I get this update if it did not come automatically? You need to go to the TV settings and select "Support". There should be an update option here, when selected, you will need to confirm the action and select network boot. Then the system will find new firmware and prompt you to install it.

Conclusion

As mentioned at the beginning of the article, more people will choose a full-color image, rather than a high-resolution image. This is quite logical. After all, a lot of pixels is undoubtedly good, but even better when the pixels are good. The list of TVs with HDR support is still small. LG, Sony and Samsung have such models.

The development of technology seems to be much more promising than the race for resolution. At recent TV shows, new models have been announced that should not only support the highest resolution, but also provide high brightness, as well as show certain levels of black and cover a large number of shades. It should be noted that the HDR format is declared by default in many models that will be released in 2017. The problem may lie only in the standards. Content producers and TV producers need to solve it, and this year, apparently, will be dedicated to just that.

Thus, we found out what HDR is on a TV, what this technology is for, what advantages and disadvantages it has. Of course, today it is impossible to strongly recommend TV lovers to switch to new models, since the technology is still at the development stage. But, knowing the current pace of development, we can say with confidence that in a year HDR will reach a qualitatively different level and that's it. more people will begin to purchase TVs that support extended range. By this time, content producers will be able to produce a large number of HDR movies and series, and watching TV will bring even more to fans. beautiful picture.

The cameras of the Pixel and Nexus smartphones have never been anything special, but over the past four years they have taken a powerful leap forward and now occupy the first lines of the ratings. Why did it happen? Because Google has implemented a software post-processing engine called HDR+. In this article, we will explain how it works and how to enable HDR+ on your smartphone, regardless of brand.

What is HDR

To fully understand how HDR+ works, you will first need to understand regular HDR.

The main problem of all smartphone cameras is the small size of the matrix (or rather, photocells) and, as a result, insufficient coverage of the dynamic range. To correct this drawback, the HDR (High-Dynamic Range) algorithm was developed, the principle of which is as follows: the camera takes a frame with a standard exposure level for a given scene, then takes an underexposed frame, on which only overexposed areas of the original image will be clearly visible, then An overexposed photo in which only the dark details of the original photo are visible, and everything else is overexposed. Further, the images are superimposed on each other and combined using special algorithms, the quality of which depends on the manufacturer of the camera software. The result is a picture with good detail in both the shadows and the brighter areas.

The disadvantages of HDR are obvious: for a long time shooting leads to the fact that the moving objects caught in the frame will double, and even a slight shaking will blur the picture.

What is HDR+

Smart heads have come up with an algorithm devoid of the shortcomings of HDR. However, it has only one name in common with HDR.

HDR+ stands for High-Dynamic Range + Low Noise. He received his fame for a number of outstanding features: the algorithm is able to eliminate noise with virtually no loss of detail, improve the quality of color reproduction, which is extremely important in poor lighting and at the edges of the frame, at the same time it greatly expands the dynamic range of photography. HDR +, unlike standard HDR, is almost not afraid of smartphone shaking and movement in the frame.

The first HDR+-enabled smartphone was the Nexus 5. Due to not the best white balance and a small aperture (f2.4), the camera of this smartphone was considered nothing more than a strong middling. Everything changed with the release android updates 4.4.2. It was it that brought with it support for the HDR + mode and the amazing quality of night shots. Although they were not very bright across the entire field of the frame, thanks to HDR + they practically did not contain noise while maintaining small details and had excellent (for smartphones in 2013) color reproduction.

History of HDR+

How does a company that has never done a camera come up with an algorithm that works wonders using conventional, by flagship standards, Nexus and Pixel cameras?

It all started in 2011, when Sebastian Thrun, CEO of Google X (now just X), was looking for a camera for augmented reality glasses. Google Glass. The weight and size requirements were very strict. The size of the camera matrix had to be even smaller than in smartphones, which would have an extremely bad effect on the dynamic range and would lead to a lot of noise in the photo.

There was only one way out - to try to improve the photo programmatically, using algorithms. This task was to be solved by Marc Levoy, a lecturer in the computer science department at Stanford University, an expert in the field of computational photography. He was engaged in technology for capturing and processing images based on software.

Mark formed a team known as Gcam, which began to study the Image Fusion method (fusion of images), based on combining a series of images into one frame. Photos processed using this method turned out to be brighter and sharper, with a small amount of noise. In 2013 technology debuted in Google Glass, and then, in the same year, renamed HDR +, appeared in the Nexus 5.

How HDR+ works

What about dynamic range expansion? As we already know, using a fast shutter speed saves us from overexposed places. It remains only to remove the noise in the dark area using the previously described algorithm.

At the final stage, the resulting image is post-processed: the algorithm minimizes vignetting due to light hitting the matrix at an oblique angle, corrects chromatic aberration by replacing pixels at high-contrast edges with neighboring ones, increases the saturation of greens, blues, and purple shades shifts towards blue, sharpens (sharpening) and performs a number of other steps that improve the quality of the photo.

Left photo from stock samsung cameras in HDR, and on the right is a photo created in Gcam in HDR +. It can be seen that the algorithm sacrificed the detail of the sky to draw objects on the ground.

Ultra-high definition television has rapidly entered our lives. Now, neither video with a resolution of 3840 by 2160 pixels, nor games with support for such a resolution, seem to be something unrealistic. Both online cinemas and operators broadcast in Ultra HD format satellite television. Monitors, TVs and projectors with a resolution of 4K (which usually means those same 3840 by 2160 pixels, or, more rarely, 4096 by 2160) are on the market big amount models, while only projectors remain relatively expensive, while monitors and TVs are already affordable for the mass buyer. The very essence of doubling the resolution when moving from Full HD to 4K UHD is clear to consumers and does not require special explanation - higher resolution, higher clarity, image detail, you can sit closer to the screen, so that the pixel structure is not visible and the picture covers a larger viewing angle, that is, the image approaches reality, to what a person sees in the world around him.

The next step in the development of the imaging industry is the introduction of support for high dynamic range or HDR (from h igh d dynamic r ange), which, combined with ultra-high resolution, leads to the concept 4K HDR. HDR - what is it? Why is HDR needed on a TV or projector? What does the user get from HDR? We will try to give answers to these questions, and whether it is worth paying extra for HDR or changing the TV to a model that supports HDR, let everyone decide for himself.

Human vision can work in a huge range of brightness, namely from 0.000001 cd/m² to 100,000,000 cd/m². For those familiar with photography and videography, this equates to approximately 46.5 exposure stops. At the same time, the so-called night vision works up to 0.01 cd / m². Under these conditions, photoreceptors with high sensitivity - rods - are active. The features of night vision include low resolution and the inability to distinguish colors. In conditions with a brightness exceeding 10 cd / m², photoreceptors of another type, cones, work, and vision becomes daytime, with high resolution and color. Under conditions of transition from 0.01 to 10 cd/m², vision is twilight, combining the properties of night and day. Obviously, in order for the image to be in color and retain detail, the lower limit of the brightness of the darkest shades should be in the zone of twilight vision and, preferably, closer to the border of daytime vision.

With the upper limit, it helps to determine the fact that the established visual contrast is at the level of 5000: 1 or just over 12 exposure steps. This is due to the fact that human vision with the help of a variety of mechanical (pupillary reaction), photochemical and neural adaptive processes adjusts to the surrounding conditions so as to maintain maximum efficiency. As a result, for example, for 0.1-1 cd / m² perceived by the eye as black, we will get the required white brightness at the level of 500-5000 cd / m².

Thus, in order to be able to transmit an image as close as possible to what a person sees in real life, the TV must display a bright and contrasty picture, with a final static dynamic range of about 5000: 1. At the same time, it is better if the real dynamic range is higher than this value in order to compensate for the adaptation of vision to changes in the average brightness on the screen and to the level of illumination in the room.

However, in the case of video, HDR support does not mean only high brightness and contrast. Digital video implies that the luminance levels of the hues are encoded as numbers with a limited range of values. For example, for regular video The brightness of each of the three colors - red, green and blue - is encoded with values ​​from 16 (black) to 235 (white), which gives a total of 220 gradations of brightness of one color or shades on the gray scale (8-bit number per color). Such a small number of stops results in a significant difference in the brightness of adjacent hues, which increases in relative terms as the lightness of a hue decreases. Moreover, if the relative difference in brightness reaches 2% (for dark shades, this threshold increases), then the border between the shades can already be visually noticeable, the image acquires a characteristic banding and becomes unnatural. In fact, if we take brightness as the lower bound, below which banding can be noticeable, then in the case of conventional 8-bit color coding, the dynamic range will be only about 40:1, and we, as described above, want to get a minimum of 5000:1, and so that there are no artifacts. Of course, usually the effect of banding due to spatial and dynamic color mixing in the case of natural images received from the camera is weak or absent even for an 8-bit picture, but such a dependence on conditions is unacceptable. The obvious solution is to increase the number of gradations of shades, that is, to encode the brightness levels not in 8-bit, but in 10 or 12-bit numbers. Additionally, you can use special dependencies ( transfer functions) brightness from the numerical value of the hue, keeping the difference in brightness between the hues less than the change noticeable to the eye in the entire range of brightness. The resulting combination of high brightness, contrast and the absence of artifacts (banding) in the entire range of shades can already be the basis for demonstrating an image that is as close as possible to what a person sees in the real world. This is the basic principle of HDR.

Note that HDR technology implies compliance with the necessary conditions throughout all stages: shooting in HDR, processing in HDR, storage in a format with HDR support, transfer to a display device and the actual output in HDR. On currently several HDR standards have been adopted. The most common are probably three, namely HDR10, Dolby Vision and Hybrid Log-Gamma. Depending on the standard, in addition to the image itself, additional static data and dynamic data can be transmitted, each scene has its own, helping the display device to achieve even greater realism.

What about content in the format 4K HDR how available is it at the moment? promising sources 4K HDR look like online services that provide streaming video in up to 4K HDR. At the moment, in this format, you can watch movies in online cinemas, for example, Amazon Video and Netflix, domestic Okko, in addition, there are videos in 4K HDR on YouTube. Another source of 4K HDR content is games, in particular the game console. Sony PlayStation 4 Pro supports 4K HDR output for nearly 80 games, most notably Horizon Zero Dawn.

As an example of a display device that supports 4K HDR, consider the Sony BRAVIA , and series TVs.

The new BRAVIA XE93/XE94 series also support Dolby Vision, an HDR format developed by Dolby Laboratories, in addition to HDR10, and expect support for Hybrid Log Gamma, the third mainstream HDR standard, with a software update.

Slim Backlight Drive+ backlight technology in the XE93 series provides more precise control over local dimming. Thanks to a special end face system LED backlight(the light panel is equipped with a double block of LEDs) provides high brightness and image contrast while maintaining the slimmest possible case. XE94 series TVs are equipped with a carpet backlight system (over the entire surface of the matrix) with local dimming.

4K HDR Processor X1 Extreme in the XE94/XE93 series provides high quality images through three new technologies: Object-based HDR remastering, Super Bit Mapping 4K HDR for smooth color transitions, and Dual database processing, one of which responsible for noise reduction, and the second for improving image quality.

The technology improves the quality of video in various formats, including HDR, by adjusting the brightness of the backlight in certain areas of the screen.

The technology further improves the brightness and accuracy of color reproduction. With a wider color gamut and more natural hues, the image becomes as attractive as possible.

The new line of TVs have a 360° body design that looks great from any angle. Slim body and a special cable management system allow you to organically fit the TV into any interior. The models of the new line have an original system for hidden placement of cables inside the stand.

They will remain invisible no matter which side you look at the TV. For example, the switching on the back of the XE94/X93 series TVs is hidden behind a stylish panel made of high-quality plastic with a mesh pattern. Individual panel elements can be easily removed for quick access connectors and connection of external devices. With this design decision, a compromise was struck between style and functionality - the TV looks attractive from whichever side you look at it, at the same time, it provides all possible connection options.

For wall mounting of XE93/XE94 series TVs, a special swivel bracket has been developed that allows you to change the angle of the TV screen so that you can easily reach the connectors if necessary.

Sony BRAVIA XE94, XE93 and XE90 series TVs are pre-installed with Android TV 6.0 (Marshmallow), which provides an improved interface design, intuitive operation and new features. For ease of use voice search on the remote control added separate button. New operating system allows you to use external devices as additional memory TV (storage applications and media files up to 1 exabyte), and makes it easier to find content thanks to new system genre filtering.

Main characteristics:

In general, the prospects for the format 4K HDR, very good, manufacturers offer more models of TVs and projectors with ultra-high definition and HDR support, and the quantity and availability of related content is increasing.

Everything about HDR in smartphones: what it is, why, and where it is found

Before the advent of HDR (High Dynamic Range - extended dynamic range), manufacturers were chasing an increase in screen resolution and an increase in pixel density, and now this trend is still observed. But HDR is a much more useful technology: even a high resolution does not affect image quality as much as HDR does.

Extended dynamic range allows you to make the image much brighter, more realistic and detailed, especially in its lightest and darkest fragments, which are “flooded” by a regular SDR screen. These areas are no longer just spots, you can see the details in them. Shades get more midtones, the image gets rid of "acidity" and becomes more voluminous, pleasant for perception.

Learn more about how HDR works on TVs. The human eye is usually able to perceive wider gradations of color and brightness than an SDR screen can convey, and new technologies just help to reproduce the picture without loss of quality, with high brightness and detail.

So, if you take an image of a person standing against a bright area, then a regular display will show a relatively light and even overexposed background, but a 4K + HDR TV will allow you to see the details against this background. Or take a picture of a sunset: with orange stripes all over the sky, shaded by the long shot and the brightest, almost overexposed sun that goes below the horizon. On the SDR screen, the general plan will be hardly distinguishable, the stripes will merge into a single whole, while with the help of HDR the picture will become more detailed: you can see the contours of the sun, in the shadow general plan houses or trees will be distinguishable, and every stripe in the sky will be well drawn.

Left - image on SDR screen, right - on HDR

By the way, there is an opinion that in order to understand the full benefits of HDR, you need to view only the relevant content. But in fact, ordinary video images look better on a display with a wide dynamic range than on an SDR screen - the picture is brighter and more contrasty. But, of course, all the advantages of this technology are noticeable only when playing the corresponding content.

We can not say about HDR formats - they are supported not only by TVs, but also by mobile devices. There are two popular standards on the market right now: HDR10 and Dolby Vision. HDR 10 is the most common open format, in which the user can change the brightness and other settings of the image. It is supported by default in 4K Ultra-HD Blu-ray discs (for game consoles including). The standard characterizes the chromaticity of 10 bits per RGB channel and a peak brightness of 1000 cd/m2.

The Dolby Vision format was created by Dolby and is being called the standard of the future. Self-configuration already excluded by the user - it is assumed that the video is already perfectly calibrated. A TV that supports this format is equipped with a special hardware chip. 10-bit chrominance for Dolby Vision is the minimum, and 12-bit is allowed. Dolby Vision content is mastered at a peak brightness of 10,000 cd/m2, but with the capabilities of modern equipment, it is at the level of approximately 4000 cd/m2.

As for HDR content, the direction is now actively developing. Series and entertainment content Dolby Vision is made by Sony Pictures, Universal, Warner Bros. and other companies, it can be found on Amazon, Netflix, Ivi.ru, Google Play, iTunes and YouTube. Many TV series are already filmed with HDR in mind.

Modern consoles ( , ) and even some computers support the HDR10 format, especially when it comes to high-budget games.

HDR in mobile devices

In mobile devices, HDR technology also aims to make visual content more detailed and vibrant, but the user will not get the full experience of watching video on a 65-inch TV screen. However, even on small displays, improved color reproduction, high detail in sunny and poorly lit scenes, and the absence of glare are clearly visible.

Modern smartphones (although there are still few of them) support HDR10 and Dolby Vision formats, but a new standard has also appeared specifically for mobile devices. mobile devices HDR Premium - It was developed earlier this year by the Ultra HD Alliance. The standard implies that the device must have a screen resolution of 60 pixels per degree, support 10-bit video, have a dynamic range from 0.005 to 540 cd / m2 and cover up to 90% colors DCI/P3. Content that works according to this standard will be marked with the corresponding icon.

Some people are skeptical about HDR on small screens: it is believed that it is not always possible to fully appreciate the full advantages of a smartphone display with a wide dynamic range, especially when it comes to an OLED matrix. After all, with a smartphone, we do not sit in one place, as is usually the case when watching TV, but we move around - the lighting and viewing angles change. Also, the display can automatically change brightness depending on the lighting conditions. However, manufacturers assure: these features are taken into account by software and hardware - the best visual perception is guaranteed to the user. Well, under normal conditions, we usually watch video content on a smartphone at a right angle, so the disadvantage associated with changing viewing angles can be called insignificant.

Another complaint is that high peak brightness requires increased battery consumption. But in reality, the average device needs to be charged every evening, and the decrease in autonomy is noticeable if you watch HDR content non-stop. In addition, top models are usually equipped with fast charging technology.

Most likely, HDR in smartphones will become the standard for flagships in the near future. In any case, the prospects for the technology are good: unlike 3D that few people need now, HDR provides real advantages in terms of picture quality. And the trend towards an increase in streaming services that support HDR has clearly been outlined.

Smartphones with HDR

Some manufacturers, as we said, have already introduced HDR technology into the screens of their top models - we are talking primarily about LG, Samsung and Apple. Let's talk briefly about smartphones, the displays of which already fully support extended dynamic range.

Samsung tried to launch HDR in Galaxy Note 7, but in the end, the LG G6 () became the first normally working smartphone with a full extended dynamic range. It supports both standards - HDR10 and Dolby Vision, like TVs of this brand. Notable here is an IPS screen with Quad HD + resolution, in which everything is in order with viewing angles and, therefore, the hypothetical shortcomings of HDR are leveled.

The “icing on the cake” was HDR10 support for the new smartphone of the South Korean company LG V30, as well as its modification V30+. The device retained the 18:9 aspect ratio taken from its predecessor - for example, 21:9 movies on it have much smaller bezels than on 16:9 displays. By the way, on the POLED matrix, which is used here, these frames are invisible. Display V30 with a resolution of 2880 × 1440 pixels. capable of displaying 148% sRGB coverage and 109% DCI-P32 coverage. In Russia, the devices have not yet appeared and are expected by the end of the year.

New iPhone X () received OLED display with support for HDR10 and Dolby Vision, as well as technology true tone, that is, it not only ensures the visual fidelity of HDR, but also changes color temperature depending on lighting. The contrast here is declared very high, 1,000,000:1, brightness - up to 625 cd / m². By the way, the iPhone 8 and 8 Plus were also expected full support HDR, but Apple said that users of these smartphones will be able to see improved dynamic range, contrast and wider color gamut when playing HDR content, but only iPhone display X will be able to show the real possibilities of this technology.

Flagship screens samsung galaxy The S8 and S8+ are the first to be certified under the Mobile HDR Premium standard mentioned above, and they also support HDR10 and Dolby Vision. Both smartphones have bright AMOLED displays with highly detailed pictures and a resolution of 2960 × 1440 pixels.

***/HDR/galaxy.jpg

Left to right: Samsung Galaxy Note 8, S8+ and S8

But if the peak brightness of the Galaxy S8 is about 1020 cd / m2, then the new Galaxy smartphone Note 8 () this figure is already equal to 1200 cd / m2. Its 6.3 inch AMOLED display has a color gamut that is almost 1.5 times the sRGB space, and HDR movies will look more interesting on this screen than on the display of the S8 and S8 +, although the difference is not as significant on mobile devices.