How Does Blu-ray Work?

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Up to six layers are possible in a standard form BD. The BD format was developed by the Blu-ray Disc Association, a group representing makers of consumer electronics, computer hardware, and motion pictures. Sony unveiled the first Blu-ray disc prototypes in October 2000, and the first prototype player was released in April 2003 in Japan. The information density of the DVD format was limited by the wavelength of the laser diodes used.

3,800 BD-RE recorder that was made available only in Japan. But there was no standard for prerecorded video, and no movies were released for this player. 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. June 2006, though HD DVD players beat them to market by a few months. The first mass-market Blu-ray Disc rewritable drive for the PC was the BWU-100A, released by Sony on July 18, 2006. The DVD Forum, chaired by Toshiba, was split over whether to develop the more expensive blue laser technology.

In March 2002 the forum approved a proposal, which was endorsed by Warner Bros. HD DVD had a head start in the high-definition video market, as Blu-ray Disc sales were slow to gain market share. The first Blu-ray Disc player was perceived as expensive and buggy, and there were few titles available. Sony also ran a more thorough and influential marketing campaign for the format. AVCHD camcorders were also introduced in 2006.