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2. DVD region code - Wikipedia

   en.wikipedia.org/wiki/DVD_region_code

   Region-free players are DVD players shipped without the ability to enforce regional lockout (usually by means of a chip that ignores any region coding), or without this flag set. However, if the player is not region-free, it can often be unlocked with an unlock code entered via the remote control. This code simply allows the user to change the ...

3. DVD-Video - Wikipedia

   en.wikipedia.org/wiki/DVD-Video

   A normal DVD player can only play region-coded discs designated for the player's own particular region. However, a code-free or region-free DVD player is capable of playing DVDs from any of the six regions around the world. The CSS license prohibits manufacturing of DVD players that are not set to a single region by default. While the same ...

4. Regional lockout - Wikipedia

   en.wikipedia.org/wiki/Regional_lockout

   Regional lockout. A regional lockout (or region coding) is a class of digital rights management preventing the use of a certain product or service, such as multimedia or a hardware device, outside a certain region or territory. A regional lockout may be enforced through physical means, through technological means such as detecting the user's IP ...

5. Content Scramble System - Wikipedia

   en.wikipedia.org/wiki/Content_Scramble_System

   This can be brute-forced in about a minute by a Pentium II, or a few seconds by a modern CPU. The Content Scramble System (CSS) is a digital rights management (DRM) and encryption system employed on many commercially produced DVD-Video discs. CSS utilizes a proprietary 40-bit stream cipher algorithm. The system was introduced around 1996 and ...

6. Comparison of high-definition optical disc formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_high...

   The Blu-ray specification and all currently available players support region coding. As of July 2008 about 66.7% of Blu-ray Disc titles are region-free and 33.3% use region codes. [6] The HD DVD specification had no region coding, so a HD DVD from anywhere in the world will work in any player. The DVD Forum's steering committee discussed a ...

7. List of Compact Disc and DVD copy protection schemes

   en.wikipedia.org/wiki/List_of_Compact_Disc_and...

   DVD region code. Restricts region where media can be played by matching region number with configuration flag in DVD players. LaserLock. Includes hidden directory on the CD containing corrupted data which will cause errors while being copied. SafeDisc (version 4) See SafeDisc (versions 1-5) in previous section. SecuROM.