![]() But if, as you scroll through your options, an HDR element shows up - perhaps as an animated thumbnail for a show - the display is forced to adjust these values again as it tries to preserve the look of the HDR components. If initially, all of the on-screen elements are SDR, the display will choose a corresponding set of hue, saturation, and luminance values to make them look as good as possible. While the graphics (buttons, menus, etc.) might be presented in SDR, there could be video thumbnails or other elements on the screen that are in HDR. A classic example is the home screen of a streaming app, like Netflix, Amazon Prime Video, or Disney+. Either way, the TV knows how to perform the tone mapping.īut there are some situations where the TV is asked to display two kinds of content at once. Under normal viewing - say when watching a movie or a TV show - the TV is perfectly capable of evaluating the incoming signal and doing the necessary tone mapping because this content neatly fits into one of two boxes: Standard dynamic range (SDR), or HDR. Why would you want a source device to do tone mapping? Phil Nickinson/Digital Trends Source-based tone mapping changes this by letting a display communicate its hue, saturation, and luminance capabilities back to the source device, which in turn lets the source device do the tone mapping before the signal ever reaches the connected display. Right now, a source device like a streaming media player, Blu-ray player, or a gaming console is able to determine if a connected display can handle HDR signals or not, but it makes no other adjustments to the signal it sends. It’s rarely perfect - compromises must be made - but when it’s well-executed, you get to see a version of the movie or TV show that looks as close to the original material as possible. So the display has to make some decisions about how to translate those “out of bounds” values into something it can reproduce. Quite often, the source material will possess values for hue, saturation, and luminance that exceed what the TV can display - this happens most often with high dynamic range (HDR) content. The display is mainly interested in hue, saturation, and luminance - the three main building blocks of color, contrast, and brightness. That process examines the incoming video signal and determines how it should be presented using the display’s capabilities. Tone mapping is a process that takes place inside a TV and a very few computer monitors. What is Source-Based Tone Mapping (SBTM)? HDMI Licensing Administratorīefore we get into source-based tone mapping, let’s quickly describe tone mapping. What is HDMI 2.0b? Here’s everything you need to knowĭisney+ has a Dolby Atmos problem. Addition of Cable Power to HDMI simplifies longer cable runs
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |