從螢幕解析度來的。現有16:9= 1600: 900,18:9=1800:900⋯⋯8:9 (2:1)
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Since 1998, cinematographer Vittorio Storaro has advocated for a format named "Univisium" that uses an 18:9 (2:1) format.[7] It is designed to be a compromise between the cinema 2.39:1 aspect ratio and the HD-TV broadcast 16:9 ratio. Univisium has gained little traction in the theatrical film market, but has recently been used by Netflix and Amazon Video for productions such as House of Cards and Transparent, respectively. Moreover, some mobile devices, such as the LG G6, LG V30, Huawei Mate 10 Pro, Google Pixel 2 XL and OnePlus 5T, are embracing the 18:9 format, as well as the Samsung Galaxy Note 8 and Samsung Galaxy S9 with an 18.5:9 format.[8][9] The Apple iPhone X also has a similar screen ratio of 19.5:9 (2.16:1).