An increasing number of players/devices deliver 4K resolution, like YouTube 4K smart video, 4K TV, Apple’s 27-inch iMac, iPhone 6s, 4K Android phones, etc. Now it turns to be 4K era, 1080p is going past. To end confusion and make it clearer, videos come in 4K resolutions look real on 4k video players for computers, Android or iOS. Now the arrival of 4K videos add the number of main resolution standards for use in the home into four: standard definition (480p/540p), high definition (720p), full high definition (1080p) and ultra high definition (2160p). This is double both the horizontal and vertical measurements of the 1920 x 1080 standard (1080p, AKA Full HD) that most of us use today, offering four times the overall pixel resolution.
Technically speaking, 4K refers to a digital cinema standard that calls for a 4096 x 2160 pixel resolution.
