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. What is 4K Ultra HD? Technically speaking, 4K refers to a digital cinema standard that calls for a 4096 x 2160 pixel resolution.
