What is the HDR ghost? Teach you to recognize Dolby Vision and HDR10

At the beginning of the article, let’s take a look at the two groups of pictures taken from the TV screen and perform “blind test.” Which of the following two images can better please your eyes?


Quality is the thing that is placed there. It can be felt directly with the naked eye. The top picture has higher color saturation and brighter colors. The sunset is more abundant in the lake and the level of the ship. The details are more outstanding. This is the article. HDR display technology will be mentioned.
What is HDR?
Domestic manufacturers have always been at the forefront of the world trend. With the popularity of ultra-high-definition Blu-ray, domestic TV brands, projector manufacturers, set-top boxes/players manufacturers have begun to deploy HDR market, from hardware decoding to software optimization, bringing more delicate Quality of presentation, HDR display technology from film source, decoding to screen ecology is indeed more realistic and natural than the non-HDR screen below. HDR As we all understand, under the collocation of HDR video and display devices, the colors presented by TV are more vivid, the contrast between the brightest and darkest pictures is clearer, the objects in the picture are more realistic, and the color gamut of the picture is also As a result, it will expand and bring the user a visual impact.
In short, HDR technology allows you to experience two major advantages: First, let you feel more "bright" through the TV, HDR TV panel backlight panel will generally have a larger lumen parameters, because the LCD panel TV can do brighter than OLED, OLED panel does not have backlight system, so the two have different standards under HDR standard - LCD brightness dynamic range is more than 1000nits brightness / black bit below 0.05nits, OLED brightness dynamic range The brightness is 540 nits or more and the black level is less than 0.0005 nits. By increasing the brightness, the contrast can be greatly improved, the contrast between bright and dark in the scene becomes more apparent, and the effect of quality is effectively improved; Secondly, you can experience a wider color through the TV, HDR TV and HDR The video content is based on the 10-bit or 12-bit BT.2020 color space establishment standard, which is 60 times that of the traditional BT.709 color space, with a color of more than one billion. This improvement is for the enhancement of the entire image in terms of color levels and transitions. To the key role, for example, can display high-density orange, dark green, etc., as shown in the gamut diagram below.

BT.2020 color gamut coverage
Two HDR Standards: Dolby Vision and HDR10
Then the question arises. Are the two technologies, Dolby Vision and HDR10, currently on the market, the same thing or two different technologies?
Dolby Vision is a complete set of patented solutions, content, playback sources, and display devices must be compatible with the Dolby Vision standard, and each Dolby Vision display device comes with a dedicated chip to verify the device's output capabilities (brightness , color space, etc.) These data will be transmitted to the playback source of Dolby Vision during playback. The source will optimize the output frame-by-frame based on the data from these display devices, taking into account both the capabilities of the display device and the intention of the original signal.

Dolby Vision uses a more advanced hardware solution
The HDR10 is a big manufacturer of Samsung, SONY, LG, etc., hoping to have a more open platform than Dolby provides, saves Dolby patent fees, and does not need to add a process for submitting certifications to weaken the control of their own products. They began to develop their own solutions for HDR video and eventually evolved into a standard - HDR10. The HDR10 is built on the same core technology features as Dolby Vision. The brightness and color parameters are similar to those of the Dolby standard, but the HDR10 only supports 10 bit depth, and Dolby is the highest 12-bit.

HDR10 logo
Therefore, Dolby Vision and HDR10 have their own advantages and disadvantages. Dolby Vision adopts a hardware solution and obtains better restoration accuracy through frame-by-frame rendering. However, HDR10 can choose a wider content carrier and can use UHD 4K Blu-ray. Enjoy online streaming media, and Dolby Vision is currently only available through Netflix, VUDU and Amazon online streaming media, which means HDR10 compatibility is better "big and full", Dolby Vision is "small and fine", as to how If you choose, you can see the benevolent see the wise and see the wisdom.
Quotes: The trend of the nation's HDR In today's display field, 4K HDR is undoubtedly a major trend, 2016 is the first year of 4K HDR, 2017 is the year of the outbreak, Vizio, Sony, Samsung, Panasonic, LG, TCL, Skyworth, Hisense TVs that support HDR have been launched. Haimeidi, Kaiboer, and Tmall's box makers have also launched hard disk players/4K smart set-top boxes that support HDR decoding. In terms of content, the "Yueyue Biography ” Shooting is done using HDR technology. Some well-known foreign online video service providers, Netflix and Amazon, have started to provide HDR source broadcasts abroad. It is reported that Tencent’s domestic video also announced the introduction of Dolby Vision’s Dolby Vision technology. Hollywood films will include Batman vs. Superman: Justice Dawn, The Lego Movie, The Edge of Tomorrow, Jupiter Ascendant, The Great Gatsby, The Doomsday Collapse, Superman: The Iron Man, The Pacific Rim, and The Night Evil. We will be able to watch TV at home and let 4K HD R TV plays its real role!

Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.

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