An Easy Introduction To Blu-ray
January 30, 2010 in DVDs by article_directory
Blu-ray, also referred to as Blu-ray Disc (BD), is the name of a next-generation optical disc format. It has identical physical proportions as standard DVDs and Compact disks, however offers more than five times the storage capacity of traditional DVDs, holding up to 27 GB of data on a single-layer disc (that’s more than Two hours of high-definition video or about thirteen hrs of standard video) and up to 50 GB on a dual-layer disc. Current developments by Pioneer have pushed the storage potential to 500GB on a single disc by utilizing 20 layers. It is this kind of development that means the latest pioneer bluray player models are considered by many to be the best available.
This extra capacity combined with the use of state-of-the-art video and audio codecs gives consumers an unprecedented HD experience. In addition, extras such as bonus material and special features can be included in high quality within the same disc, so there’s no need for separate bonus discs to accompany the film title.
Blu-ray was jointly formulated by the Bluray Disc Association (BDA), a group of the world’s top consumer electronics, personal computer and media manufacturers (including Dell, Apple, HP, Hitachi, JVC, Mitsubishi, Pioneer, LG, Panasonic, Philips, Sony, Samsung, Sharp, Thomson and TDK). It has been developed to enable recording, rewriting and playback of high definition video (HD), as well as storing large amounts of data.
Whilst current optical disc technologies like DVD rely on a red laser to read and write data, the Bluray format uses a blue-violet laser instead. The benefit of using a blue-violet laser (405 nm) is that it’s got a shorter wavelength than a red laser (650 nm), which makes it possible to focus the laser spot with even greater accuracy. This allows data to be packed more closely and stored in a reduced amount of space, so it’s possible to fit more data on the disc. Nevertheless, despite the different type of lasers used, Bluray products can easily be made backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup device.
During the format battle over high definition optical discs, Bluray Disc competed with the HD DVD format. Nonetheless, on February 19, 2008, Toshiba (the primary company supporting HD DVD) announced that it’d no longer develop, produce, or market HD DVD players and recorders, leading virtually all other HD DVD companies to follow suit, and thus effectively ending the format war. Blu -ray is presently supported by about 200 of the world’s leading pc, consumer electronics, recording media, music and video game companies. The format has the benefit of support from all Hollywood studios and other smaller studios as a successor to the current DVD format. Major blank media manufacturers such as TDK also support the Blu-ray Disc format as the successor to DVD.
Blu-ray provides a number of the strongest copy protection methods ever created for any consumer format, which makes it the best option for any content publisher wanting assurance that their valuable assets are protected from piracy. The format incorporates a powerful copy protection mechanism, which not only relies on implementation at the playback device, but which also includes safety measures at replicator level, which are strictly controlled. Unlike the voluntary implementation of CSS protection in DVD, the copy protection mechanism for Blu-ray Disc is mandatory and will be governed by strict licensing procedures.
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