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Blu-ray Disc is an optical CD storage middle considered near surpass the DVD format. The artificial Disc is 120 mm in diameter with 1.2 mm thick, the unchanged dimension because DVDs plus CDs. Conventional Blu-ray Discs repress (25 GB) apiece layer, amid dual layer discs (50 GB) being the industriousness model for feature-length video discs. Triple layer discs (100 GB) with quadruple layers (150 GB) are presented representing BD-XL re-writer drives. The nickname Blu-ray Disc refers to the blue laser old to recite the disc, which allows information near stored at a greater density than is likely with the longer-wavelength burgundy laser worn representing DVDs. The chief claim of Blu-ray Discs is because a medium representing capture substance such as trait films. Besides the hardware specifications, Blu-ray Disc is connected with a regulate of disc formats. Generally, these formats allow for the capture plus audio to stored by better classification than by Standard DVD's.
The layout was industrial near the Blu-ray Disc Association, a categorize representing makers of consumer electronics, PC hardware, plus motion pictures. The first Blu-ray Disc prototypes were unveiled fashionable October 2000, plus the earliest prototype player was released in Japan 2003. Afterwards, it perpetual to be developed until its officer issue fashionable 2006. In 2011, added than 2,500 Blu-ray Disc titles were open into Australia and the United Kingdom, amid 3,500 into the United States with Canada.
A current, single-sided, prevailing DVD bottle clutch 4.7 GB (gigabytes) of information. That's concerning the magnitude of an median two-hour, standard-definition picture amid a few mega features. But a high-definition movie, which has a much clearer persona (see How Digital Television Works), takes up regarding five time extra bandwidth and then requires a disc with about five epoch more storage. As TV sets and movie studios make the step to high definition, regulars are free near penury playback systems by a assortment more storeroom capacity.
Blu-ray is the next-generation digital video disc. It can record, store and play back high-definition video and digital audio, as well as computer data. The advantage to Blu-ray is the sheer amount of information it can hold:
- A single-layer Blu-ray disc, which is roughly the same size as a DVD, can hold up to 27 GB of data -- that's more than two hours of high-definition video or about 13 hours of standard video.
- A double-layer Blu-ray disc can store up to 50 GB, enough to hold about 4.5 hours of high-definition video or more than 20 hours of standard video. And there are even plans in the works to develop a disc with twice that amount of storage.