HDR10 MediaProfile is a recording and presentation technology for displays and TVs with a high dynamic range, based on High Dynamic Range( HDR). The number 10 stands for the 10-bitresolution. As color space, HDR10 uses the color space specified in the BT.2020 standard.
HDR10 displays are characterized by deepest blacks and brightest whites and a wide dynamic range. With the dynamic range of 10 bits, 1,024 contrast differences between 0.0005 cd/m2 up to 10,000 cd/m2 can be displayed. In contrast, a standard dynamic range( SDR) of 8 bits, as used in standard television( SDTV), can only represent 256 brightness levels. The color space of HDR10 corresponds to that of the BT.2020 standard. And as far as color representations are concerned, with a color depth of 10 bits, there are over one billion color gradations. In contrast, 16.8 million color gradations can be displayed with a color depth of 8 bits.
HDR10 displays have a minimum brightness of 1,000 nits, HDR displays one of at least 800 nits. The representation on HDR displays is adapted to the dynamic range of the recording devices with a correction function, comparable to gamma correction in classic television technology. There are two correction curves for HDR10: Perceptual Quantization( PQ) and Hybrid Log Gamma( HLG). Which correction curve is used depends on the technology and the image content and is signaled to the HDR display before playback.
HDR10 works with static metadata that contains information about image details and brightness details.
The evolution of HDR10 to HDR10+
HDR10+ is an open standard for high dynamic range displays. In HDR10+, the 10 stands for a dynamic range of 10 bits with which the contrast can be controlled. Unlike HDR10, HDR10+, which was developed by Samsung and Amazon, works with dynamic metadata. The dynamic metadata used to describe the individual scenes allows the brightness and contrast of each video scene to be adjusted via the PQ correction curve or the HLG correction curve in the display.
Unlike the proprietary Dolby Vision, which competes with HDR10+, HDR10 is an open format that can be used license-free.