A 4K resolution, also known as Ultra High Definition, delivers four times as many pixels as regular HD, making images sharper and more detailed.

Then 4K video came along. 4K UHD (the most common variant) has a resolution of 3840 x 2160 pixels, that’s exactly twice the width and height of the full HD standard.

That said, most people don't call 1080p 2K; they call it 1080p or Full HD. By the way, 1080i is the same resolution as 1080p , but no modern TV is 1080i. However, most HDTV broadcasts, including ...

Can 4K Ultra HD TVs play Full HD (1080p) content? Yes, 4K Ultra HD TVs can play Full HD content, but it won’t be displayed in the standard 1920 x 1080 resolution we’ve all come to know and love.