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A TV set with a screen resolution of 3,840 horizontal and 2,160 vertical pixels (2160p). Also called "Ultra HD" or "UHD," most high-end TVs today are 4K TVs. With four times as many pixels as HDTV, 4K TVs use algorithms to "fill in the blanks." They upscale DVD (480p), Blu-ray (1080p) and cable TV (1080i) content to 2160p, which provides better visual quality especially noticeable on screens 55" and above. See Ultra HD Blu-ray.

Native 4K Content Makes a Difference
Movies shot with 4K cameras are native 4K, and they will always look the best on a 4K TV. Although some first-time users find little difference between native 4K and upscaled 2K content, it is very dependent on the type of imagery in the video frames. In addition, upscaled 2K content may be misrepresented as native 4K.

When 4K TVs emerged in 2012, Sony offered a few 4K feature films on a hard disk player for its 84" TVs and later offered a paid download service. As of 2016, cable and satellite providers are beginning to offer 4K set-top boxes, although 4K content is limited.

4K TVs Make Passive 3D TVs Better
Although passive 3D TVs have 1,080 lines of resolution, 540 lines are dedicated to each eye. With the 4K's 2,160 lines, a passive 4K 3D TV is able to provide the full 1080p resolution to each eye (see 4K 3D TV). See 4K resolution, 4K upscaling, 4K pass-through, 4K monitor and 2K TV.

High-Definition Resolutions2K    1920x1080 (see  DTV)

   4K    3840x2160

   5K    5120x2880 (see  5K monitor)

   6K    6144x3160 (see  6K resolution)

   8K    7680x4320 (see  8K TV)

Sony FMP-X1 4K Media Player
In 2013, Sony introduced its 4K movie download service and FMP-X1 media player. Ten inches in diameter with USB ports and an SD Card slot, the unit's hard drive came preloaded with 10 feature films. It was superseded by the FMP-X10.
References in periodicals archive ?
Summary: Following the release of its highly-acclaimed 84-inch 4K LED TV, Sony on Monday announced the expansion of its 4K TV line-up with the launch of the 65-inch and 55-inch screen sizes.
4K TV sounds great, but there is one other problem: the amount of data required for 4K video content is huge.
The 4K TV market is further segmented on the basis of screen size and technologies used.
Sony on Monday showcased its new Bravia 4K TV line-up running on Android operating system.
Picture quality is the top consideration for television shoppers, and LG s 2015 4K TV lineup delivers, said David VanderWaal, vice president of marketing, LG Electronics USA.
com reveal some of the lowest prices ever on tablets, laptops, PS4 and Xbox One bundles, 4K TV deals and more than 400 Star Wars themed deals.
According to the worldwide TV market report from Futuresource Consulting, 4K TV shipments are expected to grow by 147% in 2015, despite overall 2% fall in TV sales.
LG has slashed its 65-inch 4K TV price from Dh14,999 to Dh9,999 while Samsung's 78-inch curved 4K TV from Dh24,999 to Dh19,499.
ST s Cannes and Monaco SoCs already support Conditional Access (CA) and Digital Rights Management (DRM) systems to enable the efficient delivery of next-generation 4K TV (broadcast and Internet) services.
Quantum Dot is a dramatic improvement in LED line up and the amount of brightness, colour and contrast it can deliver are much more than a 4K TV," he said.
However, 4K TV content is still an issue as no satellite broadcaster has started 4K broadcasting despite repeated trials.
4K TV ownership in the US will reach 10% by 2016 up from just 1% in 2014.