What is 4K x 2K Resolution?

What is 4K x 2K Resolution?

Posted by Jack on 14th May 2021

Definition of 4K x 2K

4K x 2K is a screen resolution for next-generation HDTVs, generally the screen format is 3840 pixels by 2160 pixels. 3840 × 2160 (4K UHD) is the dominant 4K standard, whereas the movie projection industry uses 4096 × 2160 (DCI 4K). 4K x 2K offers a total resolution of 8.3 megapixels. This is a four-fold improvement in resolution when comparing with current 1080P HD screens, which offer only a total resolution of 2.1 megapixels. 4K x 2K is also a digital cinema format.

Also Known as 4K

The term "4K" is generic and refers to any resolution with a horizontal pixel count of approximately 4,000. Several different 4K resolutions have been standardized by various organizations, please see the following table for details:


What is 4K UHD

Actually, 4K and UHD (Ultra High Definition) are different terms. The simplest way to different them is: 4K is a professional production and cinema standard, while UHD is a consumer display and broadcast standard. 

To discover how they became so confused, let’s look at the history of the two terms.

The term “4K” originally derives from the Digital Cinema Initiatives (DCI). Originally, 4K means 4,096 x 2,160 which is exactly four times the previous standard of digital editing and projection (2K, or 2,048 x 1,080). 4K refers to the fact that the horizontal pixel count (4,096) is roughly four thousand.

The term of UHD is the next step of what’s called Full HD. Full HD the official name of the display resolution 1,920 x 1,080 (also know as 1080P Full HD), UHD quadruples that resolution to 3,840 x 2,160. It’s not the same as the 4K resolution defined above — and yet almost every TV or monitor you see advertised as 4K is actually UHD. Sure, there are some panels out there that are 4,096 x 2,160, which adds up to an aspect ratio of 1.9:1. But the vast majority are 3,840 by 2,160, for a 1.78:1 aspect ratio.


HDMI Cables to Support 4K UHD

To Support 4K UHD resolution, the traditional HDMI v1.4 cables are not enough anymore, especially when the screen refresh rate is at 60Hz or above. In this situation, HDMI v2.0 cable or newer will be required. ZEMEL Warehouse supplies a wide range of HDMI v2.0 cables and HDMI v2.1 cables, good quality and great customer service guaranteed, please visit ZEMEL Warehouse for details.