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Seamless branching
Seamless branching is a mechanism used on DVDs and Blu-ray Discs to allow the player to jump to a different scene after finishing one. The most common purpose is to have several versions of a scene within one film, without having to store the entire film on the disc several times.
A popular example is the DVD of ''The Lion King'', where the user can select between the original cinematic version and an extended version. The two versions differ only in one scene (the "morning report"). The DVD player is instructed to play the film normally up to this scene, then jump to the appropriate scene as selected by the user before the commencement of the film, and then jump back to play the rest of the film. The user normally does not notice this jump, hence the word ''seamless''. A larger scale example of the same technique is seen in the 2007 DVD rerelease of ''Blade Runner'' in which three different cuts of the film are playable from the same disc.
Another possible use of seamless branching is for the localisation (translation) of on-screen visible text. The ''Star Wars'' DVDs with their opening crawl are a prime example. Normally, only the audio track of films is translated into other languages, but when text central to the plot is visible on-screen, the scene may be created once for every language, and the DVD player can be instructed to select the appropriate version of the scene depending on the user's language preference. However, for this purpose a technique called multi-angle is used more often.
== See also ==
* DVD
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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