Anamorphic widescreen is a videographic process that horizontally squeezes a widescreen image so that it can be stored in a standard 4:3 aspect ratio DVD image frame. Compatible playback equipment can then re-expand the horizontal dimension to show the original widescreen image. In its current definition as a video term, it was originally devised for widescreen 16:9 aspect ratio television sets.
DVD Video
A DVD labeled as "Widescreen Anamorphic" contains video that has the same frame size in pixels as traditional fullscreen video, but uses wider pixels. The shape of the pixels is called pixel aspect ratio and is encoded in the video stream for a DVD disc player to correctly identify the proportions of the video. If an anamorphic DVD video is played on standard 4:3 television without adjustment, the image may look horizontally squeezed.
Packaging
DVDs with a 16:9 aspect ratio are typically labeled "Anamorphic Widescreen", "Enhanced for 16:9 televisions", "Enhanced for widescreen televisions", or similar, although currently there is no labeling standard. Otherwise, the movie will only support the standard full-frame display and will simply be letterboxed, or panned and scanned for 4:3 screens.
There has been no clear standardization for companies to follow regarding the advertisement of anamorphically enhanced widescreen DVDs. Some companies, such as Universal and Disney, include the aspect ratio of the movie. Below are how various companies advertise their anamorphic DVD movies on their packaging:
* Anchor Bay: Enhanced for 16:9 TVs, includes aspect ratio in most cases.
* Artisan Entertainment: 16:9 Fullscreen Version, or Enhanced for 16:9 Television (since it became part of Lions Gate, the newer reissues include aspect-ratio information on many titles). Note that this is a misuse of the term "fullscreen", which refers to a normal 4:3 ratio.
* Buena Vista: Enhanced for 16:9 Televisions, includes aspect ratio.
* Columbia TriStar: Anamorphic Video, sometimes not labeled, includes aspect ratio.
* Criterion: Enhanced for Widescreen Televisions, or 16:9, always includes aspect ratio.
* DreamWorks: Widescreen format, enhanced for 16:9 televisions since acquisition by Paramount; aspect ratio included on formerly Universal-distributed titles.
* Image Entertainment: Enhanced for 16:9 TVs, some titles include aspect ratio.
* MGM: Enhanced for 16:9 TVs or Enhanced for Widescreen TVs, includes aspect ratio on 2001–present titles; uses Fox’s format since 2004.
* New Line Cinema: Enhanced for Widescreen TVs.
* Paramount Pictures: Enhanced for 16:9.
* Trimark Pictures: Widescreen (letterboxed means non-anamorphic) Since it became part of Lions Gate, the newer reissues include aspect-ratio information on many titles.
* 20th Century Fox: Enhanced for Widescreen TVs, Anamorphic Widescreen, sometimes not labeled, includes aspect ratio on newer titles.
* Universal: Anamorphic Widescreen (widescreen means non-anamorphic) (Gives aspect ratio of film).
* Warner Bros.: Enhanced for Widescreen TVs, says scope for 2.35 or matted for 1.85 instead of giving aspect ratio.
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