A Straightforward Introduction To Blu-ray
Blu-ray, also referred to as Bluray Disc (BD), is the name associated with a next-generation optical disc format. It’s got the same physical dimensions as standard DVDs and CDs, however offers more than 5 times the storage capacity of traditional DVDs, holding as much as 27 GB of data on a single-layer disc (that’s more than Two hrs of high-definition video or about 13 hrs of standard video) and up to 50 GB on a dual-layer disc. Recent developments by Pioneer have pushed the storage capacity to 500GB on a single disc by utilizing 20 layers. It is this kind of development that means the latest pioneer blu-ray player models are considered by many to be the best available.
This extra capacity combined with the use of advanced 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 on the same disc, so there’s no need for separate bonus discs to accompany the film title.
Bluray was jointly developed by the Bluray Disc Association (BDA), a group of the world’s top consumer electronics, pc 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 huge amounts of data.
Whilst present optical disc technologies like DVD make use of a red laser to read and write data, the Bluray format uses a blue-violet laser in its place. The benefit of using a blue-violet laser (405 nm) is that it has a shorter wavelength than a red laser (650 nm), which makes it possible to focus the laser spot with even greater precision. This enables data to be packed more closely and stored in a reduced amount of space, so it is possible to fit more data on the disc. Nevertheless, despite the different kind 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 unit.
In the course of the format war over high definition optical discs, Blu-ray Disc competed with the HD DVD format. Nevertheless, on February 19, 2008, Toshiba (the primary company supporting HD DVD) announced that it’d no longer develop, manufacture, or market HD DVD players and recorders, leading almost all other HD DVD companies to follow suit, and thus effectively ending the format war. Blu -ray is currently supported by about two hundred of the world’s leading personal computer, consumer electronics, recording media, music and gaming companies. The format also has support from all Hollywood studios and other smaller studios as a successor to today’s DVD format. Major blank media manufacturers such as TDK also support the Blu-ray Disc format as the successor to DVD.
Blu-ray provides some of the strongest copy protection methods ever created for any consumer format, which makes it the best choice for any content publisher wanting assurance that their valuable assets are protected from piracy. The format contains 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 can be strictly controlled. Unlike the voluntary implementation of CSS protection in DVD, the copy protection mechanism for Blu-ray Disc is obligatory and will be governed by stringent licensing procedures.
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