Blu-ray is a relatively new optical media format introduced by the Blu-ray Disc Association, an industry consortium which includes Sony, Philips, Apple, Panasonic and many others. It is now the standard format by default for high-definition digital media. The discs are the same physical size as a DVD, but have a capacity of 25 gigabytes per layer (discs are currently at one or two layers), large enough for a feature-length film stored at 1080p resolution with significant leftover space. The Blu-ray format is used by the PlayStation 3; in fact, for a time this game console was the only Blu-ray player on the market, a factor that helped overcome some of the objections to its high price point.
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