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The DD+ extension is used to replace the rear channels of the DD track with higher fidelity versions, along with adding additional channels for 6.1/7.1 audiotracks. On HD DVD, DD+ is used to encode all channels (up to 7.1), and no legacy DD track is required since all HD DVD players are required to decode DD+.
These may also use other aspect ratios by cropping otherwise black bars at the top and bottom which result from cinema aspect ratios greater than 16∶9, such as 1.85 or 2.35 through 2.40 (dubbed "Cinemascope", "21∶9" etc.), while the standard horizontal resolution, e.g. 1920 pixels, is usually kept.
16:9 is a widescreen aspect ratio with a width of 16 units and height of 9 units. Once seen as an "exotic" aspect ratio, [ 1 ] since 2009, it has become the most common aspect ratio for televisions and computer monitors , and is also the universal standard image format for the universal 1080p , 2160p and 4320p formats.
Effectively 1/16 the total resolution (1/4 in each dimension) of "Full HD", but with the height aligned to an 8-pixel "macroblock" boundary. Common in small-screen video applications, including portable DVD players and the Sony PSP. 480×272 (131k) 480 272 130,560 ~1% narrower than 16:9 (30:17 exact) Mac Mono 9" Original Apple Macintosh display
There are other, non-standard display resolutions with 1080 lines whose aspect ratios fall between the usual 16∶9 and the ultra-wide 64∶27, e.g. 18∶9, 18.5∶9, 19∶9 and 19.5∶9. They are mostly used in smartphones or phablets and do not have established names, but may be subsumed under the umbrella term ultra-wide (full) HD .
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To ease comparison, all sizes are scaled to 16:9 as seen on a hypothetical screen that displays at least one source pixel per pixel visible. Note that for older formats like VCD and DVD that are optimized for 4:3, this loses some vertical resolution. The HDTV resolutions are displayed 1:1.
FOV in 16:9 video game with Hor+ scaling at 4:3 resolution Static (previously anamorphic ) refers to when both the vertical and horizontal components of the FOV are fixed, typically to values comfortable on a widescreen picture, and when the resolution changes the picture is either letterboxed or pillarboxed to maintain the field of view and ...