As the mainstream image quality optimization technology, HDR has been popular for many years in the TV product line, from 10000 yuan products to thousands of Yuan products, it seems that HDR is used as a selling point.
SDR, HDR, XDR: what do these technologies have to do with us?
It is worth explaining in advance that this is not an article based on boring data. We try to interpret it more fully for you.
The relationship between technology and practical use, and try to be brief and direct, as far as possible to focus on this issue, not divergent, less nonsense.
Why is HDR hot? Not other display technologies.
In terms of the current video quality, there are five important dimensions. They are resolution, gamut, grayscale, frame rate and SDR. For the first four dimensions, they are basically mature enough.
Brightness dynamic range。
HDR: make the light look brighter and the dark look darker
We can find one of the technical features of HDR in many literatures or reports
In fact, this is the dynamic range of brightness. It also refers to the optimization of HDR algorithm to enhance the brightness of the picture and depress the dark field to obtain a more powerful visual experience.
Brightness dynamic range.
So far, we have mentioned three technical features related to today's topic
1、HDR: a software algorithm that makes light places look brighter and dark places look darker.
2、Brightness dynamic range / dynamic contrast: SDR, HDR and XDR are all used to improve this value.
3、contrast ratio: the highest brightness and the lowest brightness that the hardware device can achieve theoretically.
XDR: need stronger hardware support
The XDR mentioned above is similar to HDR. The latest Hisense ultra TV adopts Mini LED backlight.
The number of lamp beads is smaller, the number of lamp beads is more, the brightness is higher, the upper limit of brightness and the lower limit of dark field of hardware have been greatly improved, which provides a corresponding environment for the new XDR standard to obtain a better dynamic range of brightness.
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Link to the original text:Zhongguancun Online