What Is 4K Resolution? An Overview of Ultra HD - How-To Geek
https://www.howtogeek.com/690209/what-is-4k-resolution-an-overview-of-ultra-hd/
WEBOct 1, 2020 · 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.
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