What is 4K?
4K resolution or 4K denotes a display device or content with horizontal resolution on the order of 4,000 pixels. A "display" could be the screen on a TV, iPad or laptop. The Consumer Electronics Association (CEA) defines an Ultra HD television as one that displays at least 8 million active pixels, with a lower resolution boundary of at least 3,840 by 2,160. There are multiple varieties of 4K digital content ranging from 3,840 by 2,160 to 4,096 by 3,112. However, the 3,840 by 2,160 resolution is the most consistent number.
Ultra High Definition (UHD)
Basically, with more pixels, the images look sharper and more realistic. However, the individual pixels make the images look blocky and less natural. Hence, it is preferred to have displays with a higher resolution, and 4K is a very high resolution. That's why it's sometimes also known as "Ultra High Definition". Collectively, the format was originally known as 4K, and while the CEA officially changed its designation to Ultra HD, the 4K tag is more known and both terms are effectively interchangeable.
Arecont Vision MegaDome 4K IP megapixel camera - AV08ZMD-400 The 8.3MP/1080p MegaDome® 4K...Arecont Vision IP Dome cameras | Arecont Vision
Hikvision DS-2CD4A85-IZH 4K Bullet Camera 4K ResolutionLoaded with intelligent features for...Hikvision IP cameras | Hikvision USA Inc.
Sony SNC-VM772R 4K IP Security Camera With four times the resolution of Full HD,...Sony IP Dome cameras | Sony Electronics’ Security Systems Division
LTV Introduces 4K Series Product Portfolio At Security Trade Fair In Essen LTV, medium-sized manufacturer of video...LTV Europe Security Monitors | LTV Europe Sicherheitstechnik GmbH
HID Crescendo 144K FIPS High Security Smart Card For Logical And Physical Access HID Access control cards/ tags/ fobs | HID Global
Hikvision DS-7716NI-K4/16P Embedded Plug & Play 4K NVR With Up To 8 MP Resolution Hikvision Network Video Recorders (NVRs) | Hikvision USA Inc.
Vanderbilt MK-6400-5-2x4K7 Magnetic Contact Vanderbilt Access control accessories | Vanderbilt Industries
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