If you've seen TVs in stores or shows on Netflix labelled with '4K' or '1080p' resolutions but aren't sure what that means or, indeed, what the differences between them are, you've come to the ...

A 4K TV simply boosts that pixel count. Usually, it refers to a display resolution of 3,840 x 2,160, or 2160p. That's roughly four times larger than a 1080p picture, hence the term 4K.

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Because a 4K TV has four times as many pixels on the screen as a 2K 1080p TV, it analyzes the incoming signal and "fills in the blanks" for non-4K content. Blu-ray players and A/V receivers may ...