Before I can explain the difference between 4K and ‘Ultra HD’, please let me clarify what they are.
First of all, ‘Ultra HD’ and UHD are synonyms.
4K and ‘Ultra HD’ refer to a technical term called 'resolution'. Computers, Tvs and pretty much every display device has a resolution.
And the resolution refers to how many pixels are in that display.
So, they are both resolution but... Is 4K the same as ‘Ultra HD’?
The short answer is yes, they mean the same thing. ‘Ultra HD’ is usually preferred for marketing and 4K for technical comparisons.
4K (Or ‘Ultra HD’) contains 3840 pixels (wide) and 2160 pixels (height).
Total number of pixels
8294400 pixels. (More than 8 million pixels)
2160 vertical pixels.
3840 horizontal pixels.
Security camera example
Tip: Turn on the caption button if you need it. Choose “automatic translation” in the settings button, if you are not familiar to the english language. You may need to click on the language of the video first before your favorite language becomes available for translation.