12 Facts About Blu-ray


Blu-ray Disc, often known simply as Blu-ray, is a digital optical disc data storage format.

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The main application of Blu-ray is as a medium for video material such as feature films and for the physical distribution of video games for the PlayStation 3, PlayStation 4, PlayStation 5, Xbox One, and Xbox Series X The name "Blu-ray" refers to the blue laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs.

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In January 2005, TDK announced that it had developed an ultra-hard yet very thin polymer coating for Blu-ray Discs; this was a significant technical advance because a far tougher protection was desired in the consumer market to protect bare discs against scratching and damage compared to DVD, while technically Blu-ray Disc required a much thinner layer for the denser and higher-frequency blue laser.

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The 360's successor Xbox One features a Blu-ray drive, as does the PS4, with both supporting 3D Blu-ray after later firmware updates.

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Blu-ray Discs are used to distribute PlayStation 3, PlayStation 4, PlayStation 5, Xbox One and Xbox Series X games, and the aforementioned game consoles can play back regular Blu-ray Discs.

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The Ultra HD Blu-ray format delivered high dynamic range content that significantly expanded the range between the brightest and darkest elements, expanded color range, high frame rate and up to 3840×2160 resolution, object-based sound formats, and an optional "digital bridge" feature.

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Usable data rate of a Blu-ray Disc drive can be limited by the capacity of the drive's data interface.

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Recordable and rewritable (BD-RE) versions of Mini Blu-ray Disc have been developed specifically for compact camcorders and other compact recording devices.

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Blu-ray Disc allows video with a bit depth of 8-bits per color YCbCr with 4:2:0 chroma subsampling.

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Blu-ray equipment is required to implement the High-bandwidth Digital Content Protection system to encrypt the data sent by players to rendering devices through physical connections.

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On December 17, 2009, the BDA officially announced 3D specs for Blu-ray Disc, allowing backward compatibility with current 2D Blu-ray players, though compatibility is limited by the fact that the longer 3D discs are triple-layer, which normal players cannot read.

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Ultra HD Blu-ray Discs are incompatible with existing standard Blu-ray players.

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