Question: what is difference between uhd and ultra hd?
Answer: 4K is more commonly used, but you'll also find people calling it Ultra HD, or UHD. ... In its correct usage, true 4K refers to a resolution of 4096 x 2160, which was first introduced in digital cinemas. UHD refers to a resolution of 3840 x 2160, which is the resolution you actually get on the TVs you take home.