The details within the metadata describe various parameters such as maximum and average light, so that the display can understand how it needs to adjust the content to match its displaying capabilities. The metadata it uses is static, that means that it's sent to the display once and it's valid for the entire video sequence. On their own those numbers don’t mean much, but in context they do: Compared to regular SDR (Standard Dynamic Range), HDR10 allows for an image that is over twice as bright, with a corresponding increase in contrast (the difference between the blackest blacks and the whitest whites), and a color palette that has one billion shades, as opposed to the approximately 16 million of SDR (BT.709 color space). The HDR10 format allows for a maximum brightness of 1,000 nits, and a color-depth of 10 bits in BT.2020 color space. One of the things that HDR10 does is to tell the display the content is being viewed on how bright things should be. By the way, to seek immersive viewing experience, you are suggested to try out DVDFab Player 6. HDR10 is a 10-bit video stream and if you have HDR-compatible devices, it will support HDR10. HDR10 is the open-source HDR format and also referred to as 'generic' HDR, which is a slightly derogatory term, but HDR10 really refers to the baseline specifications for HDR content. That results in fidelity in the darkness, as well as that very bright point of light, with both being rendered with lots of detail and color. HDR preserves the gradation from dark to light in ways that SDR (Standard Dynamic Range) cannot. HDR aims to be a visual treat, which it very much is. The results delivered by HDR should mean richer colors, bringing more realism and depth, and added 'pop'.
Although metadata is one important factor in HDR, the TV also needs to be able to display the content it's being asked to display. Metadata is then distributed through one of many different standards, including HDR10, Dolby Vision and HDR10+.
HDR metadata is simply additional information sent with the video signal, that tells the TV how to display the content properly. Ideal for media that require high contrast or mix light and shadows, HDR preserves the clarity better than Standard Dynamic Range (SDR) because it uses at least 10-bits for dynamic range. High Dynamic Range (HDR) is the next generation of color clarity and realism in images and videos. Everything you need to know about the HDR format, UHD Drive, HDR Devices and HDR playback solutions can be found in DVDFab via its advanced packed features which are fullt dedicated to deliver the ultmost user experience. An increasing number of movies come from 4K Ultra HD Blu-ray discs in the HDR format since 2016.