Blu ray blank dvd media
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Blu-ray Disc (BD)
Blu-ray Disc (BD), sometimes called "Blu-ray", is an optical disc storage medium designed to supersede the standard DVD format. Its main uses are for storing high-definition video, PlayStation 3 video games, and other data, with up to 25 GB per single layered, and 50 GB per dual layered disc. The disc has the same physical dimensions as standard DVDs and CDs.
The name Blu-ray Disc derives from the blue-violet laser used to read the disc. While a standard DVD uses a 650 nanometer red laser, Blu-ray uses a shorter wavelength, a 405 nm blue-violet laser, and allows for almost six times more data storage than a DVD.
During the format war over high-definition optical discs, Blu-ray competed with the HD DVD format. Toshiba, the main company supporting HD DVD, ceded in February 2008, and the format war ended; in July 2009, Toshiba announced plans to put out its own Blu-ray Disc device by the end of 2009.
Blu-ray Disc was developed by the Blu-ray Disc Association, a group representing makers of consumer electronics, computer hardware, and motion pictures.
The Blu-ray Disc physical specifications were completed in 2004. In January 2005, TDK announced that they had developed a hard coating polymer for Blu-ray Discs. The cartridges, no longer necessary, were scrapped. The BD-ROM specifications were finalized in early 2006. AACS LA, a consortium founded in 2004, had been developing the DRM platform that could be used to securely distribute movies to consumers. However, the final AACS standard was delayed, and then delayed again when an important member of the Blu-ray Disc group voiced concerns. At the request of the initial hardware manufacturers, including Toshiba, Pioneer, and Samsung, an interim standard was published that did not include some features, such as managed copy.
While the Compact Disc format was originally designed for music storage and playback, CD-R blank media, DVD blank media, the format was later adapted to hold any form of binary data. Most DVD Blank Media are of the same dimensions as compact discs (CDs) but store more than 6 times as much data. Variations of the term DVD often describe the way data is stored on the discs: DVD-ROM has data which can only be read and not written, DVD-R (DVD-R and DVD+R) can be written once and then functions as a DVD-ROM, and DVD RW (DVD-RAM, DVD-RW, or DVD+RW) holds data that can be erased and thus re-written multiple times. Other types of DVD discs, like printable dvd blank media including those with video content, may be referred to as DVD-Data discs. The term "DVD" is commonly misused to refer to high definition optical disc formats in general, such as Blu-ray DVD and HD DVD. CD R& DVD R are made by a number of manufacturers, including: Taiyo yuden, Ridata / Ritec , Rodisc ,Philips ,JVC,Kodak, ProdiscMaxell, Memorex, .