Knowra Ultra-high-definition television Ultra-high-definition television Ultra-high-definition television is a family of digital video formats centered on 3840 × 2160 and 7680 × 4320 pixel images. Its standards also define image characteristics such as frame rate, color representation, and dynamic range.
4K resolution : A digital image resolution of about 4,000 pixels across, including the UHD standard of 3840 × 2160 pixels. It is the most widely deployed resolution in the UHD family.
Pixel density : The number of image pixels per unit of display area, commonly measured in pixels per inch. A UHD screen's apparent detail depends partly on how densely its pixels are packed.
Digital television : Television systems that encode and transmit audiovisual signals as digital data. UHD television is a high-resolution branch of digital television.
High-definition television : A digital television format family with standard image resolutions such as 1280 × 720 and 1920 × 1080 pixels. HD uses fewer pixels than UHD's 4K and 8K formats.
8K resolution : A digital image resolution of about 8,000 pixels across; UHD 8K uses 7680 × 4320 pixels. It is UHD's higher-resolution format, with four times 4K's pixel count.
Viewing distance : The distance between a viewer and a display or image. It determines whether UHD's additional spatial detail is perceptible.
Digital cinema : The production, distribution, and exhibition of films using digital imaging and projection systems. Cinema's 4K formats use different raster dimensions and standards from UHD television.
Full HD : A common name for 1920 × 1080-pixel video or display resolution. Full HD is a specific resolution below UHD 4K.
ITU-R BT.2020 : An International Telecommunication Union recommendation specifying parameters for ultra-high-definition television systems. It establishes UHD image parameters, including resolution, color primaries, and frame rates.
Frame rate : The number of video frames displayed or captured per second, usually expressed in frames per second. UHD standards support multiple frame rates, affecting motion portrayal and transmission demands.
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