History[edit]
The information density of the DVD format was limited by the wavelength of the laser diodes used. Following protracted development, blue laser diodes operating at 405 nanometers became available on a production basis. Sony started two projects in collaboration with Philips[9] applying the new diodes: UDO (Ultra Density Optical),[10] and DVR Blue (together with Pioneer),[11] a format of rewritable discs that would eventually become Blu-ray Disc (more specifically, BD-RE). The core technologies of the formats are similar.
The first DVR Blue prototypes were unveiled at the CEATEC exhibition in October 2000 by Sony.[12] A trademark for the "Blue Disc" logo was filed February 9, 2001.[13] On February 19, 2002, the project was officially announced as Blu-ray Disc,[14][15] and Blu-ray Disc Founders was founded by the nine initial members.
The first consumer device arrived in stores on April 10, 2003: the Sony BDZ-S77, a $3,800 (US) BD-RE recorder that was made available only in Japan.[16] But there was no standard for prerecorded video, and no movies were released for this player. Hollywood studios insisted that players be equipped with digital rights management before they would release movies for the new format, and they wanted a new DRM system that would be more secure than the failed Content Scramble System (CSS) used on DVDs.
On October 4, 2004, the name "Blu-ray Disc Founders" was officially changed to the Blu-ray Disc Association (BDA), and 20th Century Fox joined the BDA's Board of Directors.[17] The Blu-ray Disc physical specifications were completed in 2004.[18]
In January 2005, TDK announced that they had now developed an ultra-hard yet very thin coating polymer for Blu-ray Discs; this was a significant technical advance because a far tougher protection was desired in the consumer market to protect bare discs against scratching and damage compared to DVD, while technically Blu-ray Disc required a much thinner layer for the denser and higher frequency blue laser.[19] Cartridges, originally used for scratch protection, were no longer necessary and were scrapped.
The BD-ROM specifications were finalized in early 2006.[20]
AACS LA, a consortium founded in 2004,[21] had been developing the DRM platform that could be used to securely distribute movies to consumers. However, the final AACS standard was delayed,[22] and then delayed again when an important member of the Blu-ray Disc group voiced concerns.[23] 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.[24]
History[edit]The information density of the DVD format was limited by the wavelength of the laser diodes used. Following protracted development, blue laser diodes operating at 405 nanometers became available on a production basis. Sony started two projects in collaboration with Philips[9] applying the new diodes: UDO (Ultra Density Optical),[10] and DVR Blue (together with Pioneer),[11] a format of rewritable discs that would eventually become Blu-ray Disc (more specifically, BD-RE). The core technologies of the formats are similar.The first DVR Blue prototypes were unveiled at the CEATEC exhibition in October 2000 by Sony.[12] A trademark for the "Blue Disc" logo was filed February 9, 2001.[13] On February 19, 2002, the project was officially announced as Blu-ray Disc,[14][15] and Blu-ray Disc Founders was founded by the nine initial members.The first consumer device arrived in stores on April 10, 2003: the Sony BDZ-S77, a $3,800 (US) BD-RE recorder that was made available only in Japan.[16] But there was no standard for prerecorded video, and no movies were released for this player. Hollywood studios insisted that players be equipped with digital rights management before they would release movies for the new format, and they wanted a new DRM system that would be more secure than the failed Content Scramble System (CSS) used on DVDs.On October 4, 2004, the name "Blu-ray Disc Founders" was officially changed to the Blu-ray Disc Association (BDA), and 20th Century Fox joined the BDA's Board of Directors.[17] The Blu-ray Disc physical specifications were completed in 2004.[18]In January 2005, TDK announced that they had now developed an ultra-hard yet very thin coating polymer for Blu-ray Discs; this was a significant technical advance because a far tougher protection was desired in the consumer market to protect bare discs against scratching and damage compared to DVD, while technically Blu-ray Disc required a much thinner layer for the denser and higher frequency blue laser.[19] Cartridges, originally used for scratch protection, were no longer necessary and were scrapped.The BD-ROM specifications were finalized in early 2006.[20]AACS LA, a consortium founded in 2004,[21] had been developing the DRM platform that could be used to securely distribute movies to consumers. However, the final AACS standard was delayed,[22] and then delayed again when an important member of the Blu-ray Disc group voiced concerns.[23] 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.[24]
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