In CyberLink PowerDVD program, users can set or change the region code up to 5 times after initial configuration, and then the application will be locked on the region you have listed on your fifth and last change. The Blu-ray supported playback software manages that region code in computer instead of the BD drive. However, on computers, these region locking mechanism works differently. When a BD disc is inserted into Blu-ray player, a checking program on disc will compare its own RPC details to those encoded in the player and stops operation if both do not match.

BD-ROM AV (HDMV/BD-J) discs can be authored to play in one, multiple or all regions (region-free), but Consumer electronics (CE) players players are region-specific. However, the region codes for Blu-ray discs are different from DVD’s, where BD region code groups countries into three geographic areas only. Blu-Ray Disc (BD) or BD-ROM AV video discs also feature Regional Playback Control (RPC) which more commonly known as region code first introduced in DVD video discs.

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