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| regional lockout ： ウィキペディア英語版 |
regional lockout
A regional lockout (or region coding) is a class of digital restrictions management preventing the use of a certain product or service, such as multimedia or a hardware device, outside of a certain region or territory. A regional lockout may be enforced through physical means, through technological means such as detecting the user's IP address or using an identifying code, or through unintentional means introduced by devices only supporting certain regional technologies (such as video formats, i.e. NTSC and PAL).
A regional lockout may be enforced for several reasons, such as to stagger the release of a certain product, to hinder grey market imports by enforcing price discrimination, or to prevent users from accessing certain content in their territory because of legal reasons (either due to censorship laws, or because a distributor does not have the rights to certain intellectual property outside of their specified region).
==Multimedia==
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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