4K

While 2K video displays are just barely higher resolution than 1080p “TrueHD” monitors, 4K displays have almost four times the resolution of 1080p. The Digital Cinema Initiative (DCI) 4K is 4096 x 2160 pixels. The vertical pixels, at 2160, are double that of 1080P, and the horizontal pixels are more than double (1920 for 1080p versus 4096 for DCI 4K). All told, that means that DCI 4K uses 8,847,360 pixels (8.84 megapix) versus 2,073,600 pixels (2.2 megapix) for 1080p. The major difference between DCI 4K (using a 17:9 aspect ratio) and consumer 4K (using a 16:9 aspect ratio) is the number of horizontal pixels. The most popular 4K consumer format as of early 2014 is Ultra HD.