The term 4K stands for 4 kilo (4000), and is used to denote a number of standards for video broadcasting and reproduction. In Switzerland, the term 4K is generally used to describe the 3840 x 2160 pixel and the 4096 x 2160 pixel (cinema display) video standards. The terms 4K and ultra-high definition (UHD) are often used interchangeably.
4K video has a significantly higher resolution than high definition (HD) video. Popular TV stations do not currently broadcast any channels in 4k. Some Swiss TV plans, however, do include 4K test channels. Some individual sports broadcasts are also broadcast in 4K via pay television. Some video streaming services like Netflix offer movies and series in 4K resolution.
In order to view 4K video, you must use a television set which is 4K compatible. If you use a set top box, it must be 4K compatible as well.
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