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8K resolution or 8K UHD is the highest ultra high definition television (UHDTV) resolution to exist in digital television and digital cinematography. 8K refers to the horizontal resolution of these formats, which all are on the order of 8,000 pixels, forming the total image dimensions (7680×4320). 8K UHD has four times the horizontal and vertical resolution of the 1080p HDTV format, with sixteen times as many pixels overall. One advantage of high-resolution displays such as 8K is to have each pixel be indistinguishable from another to the human eye from a much closer distance. On an 8K screen sized 52 inches (132 cm), this effect would be achieved in a distance of 50.8 cm (20 inches) from the screen, and on a 92 in (234 cm) screen at 91.44 cm (3 feet) away. Another practical purpose of this resolution is in combination with a cropping technique used in video and film editing. This allows filmmakers to shoot in a high resolution such as 8K, with a wide lens, or at a farther distance from a potentially dangerous subject, intending to zoom and crop digitally in post-production, a portion of the original image to match a smaller resolution such as the current industry standard for high-definition televisions (1080p, 720p, and 480p). 8K is a display resolution that may eventually be the successor to 4K resolution. 1080p is the current mainstream HD standard, with TV manufacturers pushing for 4K to become a new standard by 2017, although the feasibility of such a fast transition as well as the practical necessity of a new standard is questionable. Few video cameras have the capability to shoot in 8K, with NHK being one of the only companies to have created a small broadcasting camera with an 8K image sensor. Sony and Red Digital Cinema Camera Company are both working to bring larger 8K sensors in more of their cameras in the coming years.〔 Although it is unlikely that 8K will become a mainstream resolution anytime soon, a major reason filmmakers are pushing for 8K cameras is to get better 4K footage. Through a process called downsampling, using a higher resolution 8K image downsampled to 4K could create a sharper picture with richer colors than a 4K camera would be able to achieve on its own with a lower resolution sensor.〔 ==History== NHK was the first to start research and development of 4320p resolution in the year 1995, later on the format was standardized by SMPTE in Oct 2007, Interface standardized by SMPTE in August 2010 and Recommended as the international standard for television by lTU-R in 2012. followed by public displays at electronics shows and screenings of Sochi Olympics Games & Public viewings on Feb 2014 and FIFA World Cup Brazil in June 2014 using HEVC with partners AstroDesign and Ikegami Electronics〔http://www.nhk.or.jp/8k/history/index_e.html#〕〔http://www.ikegami.com/NAB2015_shk810_piece_.html〕〔http://www.astrodesign.co.jp/english/product/8k-info〕 On January 6, 2015, the MHL Consortium announced the release of the superMHL specification which will support 8K resolution at 120 fps, 48-bit video, the Rec. 2020 color space, high dynamic range support, a 32-pin reversible superMHL connector, and power charging of up to 40 watts. In Feb 2015, The Video Electronics Standards Association has unveiled Embedded DisplayPort 1.4a, a new format that lets all-in-ones and laptops use 8K screens (7,680 x 4,320 to be exact) and VESA expects systems to ship with the new DisplayPort by 2016〔http://www.engadget.com/2015/02/10/embedded-displayport-8k-spec/〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「8K resolution」の詳細全文を読む スポンサード リンク
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