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To summarize and compare, a display can be both true 4K and 2160p (4096 × 2160). However, a UHDTV1 (presently referred to as just UHD) display is always 2160p, because it refers to a display resolution of 3840 × 2160.
As we've learned, UHD has a resolution of 3840 x 2160 pixels, which is 4 times the resolution of Full HD (1080p), thus the confusion with "4K." On the other hand, true 4K has a slightly higher resolution of 4096 x 2160 pixels.
The resolution of 4K is 4096×2160 pixels, known as 2160p. UHD, on the contrary, is 3840×2160 pixels, commonly known as 2160p. Although they have the same picture ratio of 16:9, the 4K has more pixels and delivers slightly better images.
2560×1440 vs 3840×2160 – Which One Should I Choose? Not sure if you should get a monitor with 4K UHD or WQHD resolution? Here's everything you need to keep in mind before deciding!
UHD-1 is the closest TV display standard to the DCI standard and refers to a resolution of 3840x2160. This resolution is four times the pixel count of Full HD. Most modern TV displays are UHD-1 as the wider aspect ratio of DCI 4K is not suitable for most TV content.
When used in a home context, 4K/UHD means the TV's screen has a minimum resolution of 3,840 pixels wide and 2,160 pixels high, making it the equivalent to two 1080p...
For the display market, UHD means 3840x2160 (exactly four times HD), and 4K is often used interchangeably to refer to that same resolution. For the digital cinema market, however, 4K means 4096x2160, or 256 pixels wider than UHD.
4K refers to one of two high definition resolutions: 3840 x 2160 pixels or 4096 x 2160 pixels. 4K is four times the pixel resolution, or twice the line resolution (2160p), of 1080p (1920 x 1080 pixels). The other high definition resolutions in use are 720p and 1080i.
While 4K is a production standard as defined by the Digital Cinema Initiatives (DCI), UHD is just a display resolution. Films are produced in DCI 4K, while most TVs have a resolution that matches UHD. The 4K production standard specifies a resolution of 4096 x 2160 pixels, twice the width and length of the previous standard of 2048 x 1080, or 2K.
In this article, we’ll take a closer look at the differences between 2160p and 4K, and explore why the term “4K” is commonly used instead of 2160p. What is 2160p? 2160p refers to a display resolution of 3840 x 2160 pixels.