The 4K standard was born in 2003 and develops in 2013.

In 2014, the Consumer Electronics Association (CEA) ® agreed to use "4K Ultra HD" and "4K UHD" as common terminology to describe the new generation of products, technologies and television content.

Basically there are three 4K standards:
• UHD or UHD-1. Ultra High Definition also called 2160p
• DCI 4K. 4096 x 2160 resolution
• UW4K. Ultra Wide 4K with 3840 x 1600 resolution in different formats: 12: 5, 2.4: 1 and 21 6: 9