4K Ultra HD generally offers four times the resolution of standard 1080p HDTVs. Ultra HD (also known as 4K), or Ultra High Definition, is the next big step in HDTV resolution. 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, but the 3,840 by 2,160 resolution is the most consistent number we've seen and the standard resolution most UHD/4K HDTVs and monitors have settled on. It's a nice, even number, doubling the horizontal and vertical pixels offered by 1080p (1,920 by1,080 pixels), which itself became the standard for high definition. If you are looking for the best of the best, a 4K Upscaling Player is certainly the perfect choice for you.