$CWTC 4K UltraHD, also known as Ultra High Definition, Ultra HD or 4K, is a video format conceptualized by the Japanese public broadcasting network, NHK. On October 17, 2012. Ultra HD (4K), or Ultra High Definition, is the next big step in HDTV resolution. http://worldnationliveentertainment.com/4k-hd-video/