4K, with a new generation of Hollywood blockbuster resolution standards. Unlike the so-called HDTV (1080P, 1920 × 1080 resolution) that we watch at home, unlike the large 2K resolution screen (2048 × 1080 resolution) of a traditional digital cinema, it has a 4096 × 2160 resolution Ultra-fine screen. The traditional HDTV is 2.07 megapixel images, while the traditional digital cinema to see the 221 megapixel picture in the 4K theater, you can see 885 megapixel high-definition picture.
In the field of digital technology binary arithmetic is commonly used and the size of the digital image is described by the pixels that make up the image. Since the number of pixels that make up a digital image is huge, it is usually expressed in K. 2 of the 10th power that is 1024, therefore: 1K = 2 ^ 10 = 1024, 2K = 2 ^ 11 = 2048, 4K = 2 ^ 12 = 4096.