Blu-ray (not Blue-ray) often known as Blu-ray Disc (BD), is a name of a next-generation optical disc format jointly created by the Blu-ray Disc Association (BDA), a collection of the world's major consumer electronics, PC and media manufacturers (including Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson). The format was developed to permit recording, rewriting and playback of high-definition video (HD), as wel as storing large amounts of information. This data format gives more than five times the storage capability associated with traditional DVDs and can keep up to 25GB on a single-layer disc and 50GB on a dual-layer disc. This added capacity combined with the use of advanced video and audio codecs offer customers an unprecedented HD experience. Whilst current optical disc technologies such as DVD, DVD±R, DVD±RW, and DVD-RAM make use of a red laser to read and write data, the new format employs a blue-violet laser instead, hence the name Blu-ray. Despite the distinctive kind of lasers employed, Blu-ray products can without difficulty be made backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit. The benefit of using a blue-violet laser (405nm) is that these have a shorter wavelength than the red laser (650nm), which makes it possible to concentrate the laser spot with even greater precision. This enables data to be packed even more tightly and stored in less space, so it is possible to fit far more data on the disc even though it's the same dimensions as a CD/DVD. This together with the change of numerical aperture to .85 is what enables Blu-ray Discs to hold 25GB/50GB. Recent development by Pioneer has pushed the storage capacity to 500GB on a single disc by applying 20 layers. Blu-ray is at present supported by about 2 hundred of the world's leading consumer electronics, personal pc, recording media, game and also music companies. The format has the benefit of support from all Hollywood studios and countless smaller studios as a successor to the current DVD format. Several studios have additionally announced that they will commence releasing new feature films on Blu-ray Disc day-and-date with DVD, as well as a continuous slate of catalog titles every month. .
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Blu-ray (not Blue-ray) also referred to as Blu-ray Disc (BD), is the name of a next-generation optical disc format jointly created by the Blu-ray Disc Association (BDA), a collection of the world's primary consumer electronics, PC and media manufacturers (including Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, TDK and Thomson).
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