The Consumer Electronics Association has announced that the consumer name for 4K will be Ultra HD and gears up for displays. There is so much confusion regarding the different resolutions out there so let's dig in.....
4K vs. UHD
The simplest way of defining the difference between 4K and UHD is this: 4K is a professional production and cinema standard, while UHD is a consumer display and broadcast standard. To discover how they became so confused, let’s look at the history of the two terms.
The term “4K” originally derives from the Digital Cinema Initiatives (DCI), a consortium of motion picture studios that standardized a spec for the production and digital projection of 4K content. In this case, 4K is 4,096 by 2,160 and is exactly four times the previous standard for digital editing and projection (2K, or 2,048 by 1,080). 4K refers to the fact that the horizontal pixel count (4,096) is roughly four thousand. The 4K standard is not just a resolution, either: It also defines how 4K content is encoded. A DCI 4K stream is compressed using JPEG2000, can have a bitrate of up to 250Mbps, and employs 12-bit 4:4:4 colour depth.
Ultra High Definition, or UHD for short, is the next step up from what’s called full HD, the official name for the display resolution of 1,920 by 1,080. UHD quadruples that resolution to 3,840 by 2,160. It’s not the same as the 4K resolution made above — and yet almost every TV or monitor you see advertised as 4K is actually UHD. Sure, there are some panels out there that are 4,096 by 2,160, which adds up to an aspect ratio of 1.9:1. But the vast majority are 3,840 by 2,160, for a 1.78:1 aspect ratio.
4K is technically a better resolution than QHD. Simply put, QHD is 2K approximately half resolution of 4K which is popularly known as UHD by TV manufacturers. UHD is the resolution most commonly supported by most TVs.
At the consumer level, no. The two terms are practically interchangeable. But talk to professionals in the video production or cinema industry and they’ll chew your ear off about how what we lowly consumers call 4K isn’t actually 4K at all. Technically, they’re right. True 4K has a resolution of 4096 x 2160 pixels, abbreviated 2160p. On the other hand, UHD is 3840 x 2160, also abbreviated 2160p. Although the image ratio of both 16: 9, 4K standards has slightly more pixels, and it is used for digital production and cinema.
QHD vs. UHD
QHD is four times the definition of old standard 720p HD, meaning you can fit the same number of pixels as four HD displays into a QHD display of the same size, namely 2560 x 1440 pixels. With a stunning resolution of 2560 x 1440 pixels, Quad HD (QHD) offers superior picture quality and sharp imagery which captures all those tiny little details to truly ensure you have the best gaming experience.
When 1080p hit the market, it was revolutionary for its time. But since then, things have changed rapidly and we now have something even better, four times better to be exact, and we call it UHD. UHD resolution is 3840 x 2160 pixels. To put that into perspective, a full HD 1080p image only has a 1920x1080 resolution. UHD screens have about 8 million pixels, which is around four times what the current 1080p set can display. This imagery is nothing like you've ever seen before and will expose you to a whole new world. The difference between QHD and UHD is the resolution: QHD is defined by a display resolution of 2560 x 1440. UHD, on the other hand, can display 3840 x 2160. However, both feature a 16:9 aspect ratio.
QLED vs 4K UHD
QLED has several key features such as 100% colour volume, quantum processor 4K, ambient mode, and quantum HDR 4x. This means that QLED enables people to get a more realistic picture, having a very sharp and detailed colour, plus modify the dark and bright scenes in specific conditions.
4K Ultra HD is the old version. Both will able to give you a good smart TV technology that easy to program and run. This also helps to compatible with all the smart devices you have in your home that will work with a seamless connection.