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Blu-ray Disc

 

Blu-ray Disc (BD) is an optical disc storage medium designed to supersede the DVD format. The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs. Conventional (pre-BD-XL) Blu-ray Discs contain 25 GB per layer, with dual layer discs (50 GB) being the industry standard for feature-length video discs.



Blu-ray Disc
Blu-ray Logo
Media type High-density optical disc
Encoding H.262/MPEG-2 Part 2, H.264/MPEG-4 AVC, VC-1
Capacity 25 GB (single-layer), 50 GB (dual-layer), 100/128 GB (BDXL)
Block size 64 kb ECC
Developer Blu-ray Disc Association
Dimensions 120 mm diameter, 1.2 mm thickness
Usage Data storage; High-definition video (1080p); High-definition audio Stereoscopic 3D; PlayStation 3 games

The format was developed by the Blu-ray Disc Association, a group representing makers of consumer electronics, computer hardware, and motion pictures. The first Blu-ray Disc prototypes were unveiled in October 2000, and the first prototype player was released in April 2003 in Japan. Afterwards, it continued to be developed until its official release in June 2006.

Physical media
While a DVD uses a 650 nm red laser, Blu-ray Disc uses a 405 nm "blue" laser diode. Note that even though the laser is called "blue", its color is actually in the violet range. The smaller beam focuses more precisely, thus enabling it to read information recorded in pits that are less than half the size of those on a DVD, and can consequently be spaced more closely, resulting in a shorter track pitch, enabling a Blu-ray Disc to hold about five times the amount of information that can be stored on a DVD.

 

Software standards


Java software support At the 2005 JavaOne trade show, it was announced that Sun Microsystems' Java cross-platform software environment would be included in all Blu-ray Disc players as a mandatory part of the standard.


Region codes As with the implementation of region codes for DVDs, Blu-ray Disc players sold in a specific geographical region are designed to play only discs authorized by the content provider for that region.

Region code Area
A   Includes most North, Central and South American and Southeast Asian countries plus Taiwan, Japan, Hong Kong, Macau and Korea.
B   Includes most European countries, African and Southwest Asian countries plus Australia and New Zealand.
C   Includes the remaining central and south Asian countries, as well as China and Russia.

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Version: 3.2.7
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Requirements

You can download Blu-ray Media Player and test it before buying.

Requires OS X 10.5+ and Blu-ray Drive

Requires Windows XP or later and Blu-ray Drive

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