QHD vs 4K – what’s the difference?

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With resolutions getting higher all the time, it’s hard to choose the right one. Full HD is already the past, now we have QHD and 4K. So which one of the two should we choose?


The basics

QHD (also called 2K) is 2560×1440 pixels. 4K (aka UHD) is around 4096×2160 pixels. 2K can be found in many new smartphones and tablets, 4K – in TVs, monitors and the Xperia Z5 Premium, which “leaves the competition far behind”. Or at least that is what Sony says. It’ s the name, not the numbers that play a big part. Everybody would like the “world’s first 4K smartphone”, despite the fact that QHD is already more than enough for a screen so small.

Which one is better?

2K (QHD) vs 4K (UHD)

One problem with high resoution screens is the amount of power required to make them work. If you’re using a portable device, whether that is a laptop, phone or tablet, the higher the resolution, the higher the energy consumption. And that is not good. Also, a higher resolution means more pixels. And more pixels mean that the device is slower. With all those drawbacks, there should also be some fun. There is, but so far there is not a lot of 4K footage on the web, which makes 4K future proof but not super useful at the moment. Even the Android OS is displayed in FHD.

QHD on the other hand is a great choise. It is noticeably better then 1080p, while still energy-efficient. It is a great compromise.

Video

Many cameras offer 4K video recording. The problem with that is the amount of storage required. One minute of UHD video will take up from 340 MB to 12,3 GB (or even more). That’s one of the reasons why 4K video is not so popular on VOD services (like YouTube). Assuming that the average smarphone app is 40 MB big, one minute of 4K recording from the iPhone 6S is the equivalent of more than 9 such apps, and one minute of 4K footage from the Blackmagic Camera 4K is the equivalent of 300. Also, 4K cameras are more expensive. So if we don’t watch our holiday videos in the cinema, there is no need to record in 4K. This resolution might be very useful in the future though, especially in VR.

Images: VideoMashupMix (https://www.youtube.com/channel/UCzBmTrbcoiHXygiPU3fr-dg), androidpit.com

Statistics: 4kshooters.net, iphonehacks.com

 

 

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Patrick is a student and tech enthusiast, mostly interested in UI design, Android modding and custom ROMs.
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