4k vs 1080p and Upscaling: What's the Difference? - RTINGS.com
https://www.rtings.com/tv/learn/4k-ultra-hd-uhd-vs-1080p-full-hd-tvs-and-upscaling-compared
WebFeb 19, 2021 · 4k and 1080p refer to the resolution of the display. A 1080p TV has 1920 horizontal pixels and 1080 vertical pixels, while a 4k TV has 3840 horizontal pixels and 2160 vertical. It can get confusing because 1080p refers to the number of vertical pixels (1080), but 4k refers to the number of horizontal pixels (3840).
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