TV hdr support - what it is: why do you need hdr support

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TV support hdr what is itScientific and technological progress every year offers the attention of ordinary consumers more and more new models of household equipment. It seemed that more recently in all apartments there were standard televisions with a ray tube. Today, LCD panels and hi-digital systems are already experiencing their sunset, replaced by 4K TVs with slightly curved screens. But TVs with HDR resolution have become a real trend of the past year. We'll figure out what HDR means and why we need a similar effect.

HDR support

The content of the article

  • HDR support
    • What is HDR?
      • The first application is in photography
    • Visual effect
    • The essence of technology
  • Technology Required Content
  • Receiver Requirements
  • HDR TVs
    • Model Overview

At modern exhibitions, where the public is presented with new products from leading manufacturers of TV equipment, specialists and connoisseurs of innovation focus on the quality of the transmitted image: contrast, color brightness, accuracy color rendition. Most of all, high-definition TVs that support HDR-mode meet.

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What is HDR?what it is

The widespread introduction of this technology in television broadcasting began in 2016, and today, two years later, it is becoming increasingly popular. From English, the abbreviation HDR translates as "extended dynamic range". The main objective of this function is the most reliable image of the surrounding reality. From a technical point of view, the two most important components of a screen image are contrast and color accuracy.

  • By contrast is meant the maximum range of ratios of the darkest and brightest parts of the frame.
  • Color accuracy implies the realism of the color transmitted to the screen.

The combination of these two components determines the overall quality of the resulting image.

REFERENCE. The term “extended range” in this case refers to the peak illumination of bright places and denser blackness in the darkened parts of the image.

Simply put, than on the TV screen “black is blacker and whiter is whiter”, the picture seems more voluminous. They are approaching the natural perception of the world around us with human vision.

The first application is in photography

Earlier, before the TV, a similar technology has already found its application in photography.. From several frames with different exposures, one digital photograph was formed, simulating an extended range of perception.

a photo

Usually four identical frames are taken for this, each lighter than the other. All of them are then assembled, merging, into one image. This process can be performed both manually and automatically, using special programs built into the digital device. Because of this effect, the photo often seemed unrealistic, too detailed. It was more like a painting than a digital photo.

Visual effectvisually

As an example, you can compare the ultra-modern 4K TV and the usual flat panel, but with the function of an extended range of dynamics.

For the human eye, the image on the second screen will look more realistic. And this is despite the higher resolution on the TV from a series of 4K receivers. There are four times more pixels in them than in the standard “full HR di” made five years ago.

IMPORTANT! The HDR function, which allows you to get a more contrasting, “deeper” and more natural color image, always looks better than other modern technical tricks.

Achieve the desired visual effect and allows the saturated brightness of colors. In addition to the increased gradation of light and shadow, HDR receivers have increased coverage of color ranges. TSuch TVs are not only capable of displaying primary colors in a high-quality manner. They can be an order of magnitude better separated and displayed on the screen with all their shades. Due to this, the overall palette of displayed colors significantly increases.

REFERENCE. Unlike photography, the video image does not seem unrealistic to the viewer, as if passed through many digital filters.

It, on the contrary, is perceived much more naturally and more realistically.

The essence of technologyessence

HDR technology - “high speaker range” - is a combination of two integral components: a transmit-receive TV device and content.

Contrary to the opinion of the uninitiated, An extended range TV set is the simplest of these two parts. The TV should only be able to highlight certain areas of the screen with color, make them brighter than analogues that are not equipped with an HDR function.

Technology Required Contentcontent requirements

Things are much more complicated with content. He must have the ability to support the function of HR di-ar, and without this, there will be no “extended dynamic" image. In the last couple of years, many programs and films have already been shot in a format capable of supporting HDR. Nevertheless, their number in relation to ordinary content is still negligible.

REFERENCE. Even in previously captured content, an HDR function can be added without any problems. In this case, you do not need to make any special inclusions in the finished video material.

The main problem of transferring content to a TV is actually the transfer of information data. At the same time, the video material is compressed, and then broadcasted.

When receiving normal data, a TV equipped with an extended dynamic range will see and play only a standard picture. And only special video content will be broadcast on the screen in real HDR quality. Only with it will the television be able to receive special metadata that gives the equipment instructions on how to display this or that frame.

Receiver Requirementsreceiver requirements

In addition to content requirements, to get a high-quality image There are additional conditions for equipping a television set and digital set-top box.

Both must have HDMI output.. Its version should be higher than 2.0, and if necessary, can be updated programmatically to 2.0a.

Despite the small amount of video content using this enhanced image function, its number is constantly growing. In addition, a number of companies working in the field of software development offer users special applications. They are able to automatically convert regular video to high-quality HR di-ar content.

HDR TVsmodels

The world's leading television equipment companies have been producing televisions with built-in HDR support for several years now. But, There is still no consensus among manufacturers regarding the standardization of this function.

In this regard, today there are TV receivers with two types of formats on sale.

  • HDR-10. In him received metadata is fully attached to the video file. This technique is more common today in the global market.
  • Dolby Vision. In this format each image frame is processed separately. So far only TVs of the South Korean company LG work.

Since this year, however, the first step has been taken to standardize the receiving equipment. Manufacturing companies have agreed to certify HCH-TVs as UHD-Premium. In addition, capable of working in high-quality format and equipment made in 4K blue-ray format.

Model Overviewmodels

In the domestic market there are the following models of HDR displays.

  • South Korean LG introduced the panel UD99 in 32 inch and worth 70 thousand rub.
  • Dell released a model UP2718Q for 130,000 thousand rub.
  • Samsung LU28E590DS - a fairly budget option, costing only 23 thousand rub. with support for HDR-10.
  • Televisions from Sony. True, the cost of the "Japanese" is by no means budgetary and amounts to about 130 thousand. rub.

In conclusion, it should be noted that HR di-ar technology is by far the best way to get the sharpest and most saturated image on the screen. Therefore, we can say without exaggeration that beyond the extended dynamic range is the future.

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