No, it's not a creature of the deep or any mythical beast. Blu-ray is a third-generation digital media or data storage technology from the Blu-ray Disc Association, an assembly of corporate media and electronics technology leaders. Blu-ray discs are currently contentious with Hd-Dvd to come to be the new visual disc format. They have much more storage capacities and data exchange speeds than approved Dvd's and Cd's.
Blu-ray Disc Versus Other visual Discs
Blu-ray
A Blu-ray disc, looks much like any other visual disc, together with first-generation Cds, second-generation Dvds, and the contentious third-generation Hd Dvds.
A Blu-ray disc ideas uses a blue-violet laser with a wavelength of 405 nanometers to write and read data on the visual disc. This laser is the source of Blu-ray's name and the technology which differentiates Blu-ray from former generation visual media. The 405 nanometer blue-violet laser is also used for writing and reading data on third-generation Hd Dvd discs, which have smaller data storage capacity per layer. Older visual media want a red laser for data storage and retrieval.
Blu-ray storage Capacity
The Blu-ray disc ideas uses a shorter wavelength than approved visual discs (Cd systems use a red laser with a wavelength of 780 nanometers whereas Dvd systems use the same red laser with a wavelength of 650 nanometers). The shorter wavelength means more exact data recording, which allows more data to be packed on the Blu-ray disc surface than a comparable Cd or Dvd surface. In fact, a appropriate single-layer Blu-ray disc can store as much as 25 Gb of digital data, more than five times the storage capacity of approved Dvds. A dual-layer Blu-ray disc can store a maximum of 50 Gb of digital data. On the drawing board are quadruple-layer Blu-ray discs with 100 Gb digital data storage capacities.
Blu-ray Support
To enjoy the essential benefits of a Blu-ray disc, one must have a Blu-ray disc player (either standalone or software-based) that supports reading of the Blu-ray disc. Blu-ray video players need to have an Mpeg-2 codec (which makes a player capable of playing Dvds and Hd Dvds), a Vc-1 codec, and an Avc or Mpeg-4 codec. Movies stored in Blu-ray discs will use any one of the above-mentioned codecs. One movie can also have more than one codec, as long as each codec used is supported by Blu-ray technology.
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What is Blu-Ray?
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