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HD DVD
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Blu-ray
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Storage Capacity
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1-layer = 15GB; 2-layer = 30GB; 3-layer = 45GB
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1-layer = 25GB; 2-layer = 50GB; 4-layer = 100GB;
Plans for 8 layer disc (200GB)
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Backward Compatibility
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Dual layer, dual sided discs can be manufactured with a 30GB HD-ROM side and 8.5GB dual layer standard DVD side, making it playable on standard DVD player (or as a standard DVD on a Blue-Ray player)
Standard DVD can be played in HD DVD player.
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Although not yet adopted as a format standard, a three-layer disc can be produced with Blu-Ray high definition on two layers and standard definition on one. The disc is one-sided.
Standard DVD can be played in a Blu Ray player with a second optical pickup.
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Studio Support
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Warner, Paramount, New Line, Universal
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Sony (Columbia/TriStar), Buena Vista, Fox, Paramount, Warner, New Line, Lions Gate
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Hardware Manufacturers
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Toshiba, NEC
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Sony, Hitachi, LG, Matsushita, Pioneer, Phillips, Samsung, Sharp, Thompson
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Durability/ Protection
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The disc is the same as a standard DVD. The data layer is buried in the middle of a disc, halfway through a chunk of plastic 1.2 microns thick.
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The data layer is behind .01 microns of plastic and a protective coating. This disc is slightly thicker than existing discs. A disc coating will be used for protection
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Manufacturing
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Can be manufactured on the same line as current DVDs, representing a huge start up cost savings. There will be minimal per disc cost increases.
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Plants need to be re-tooled for replication. It is speculated that replicators could sell off 40-50% of their current DVD production assets to make Blue-ray. Sony DADC anticipates that, while Blue-ray will be more expensive to start, the cost of making a Blue-ray DVD will eventually equal that of a standard DVD.
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Copy Protection
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AACS (which includes 128-bit AES encryption and device key retirement) plus mandatory HDCP encrypted output and a volume identifier layer,
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AACS plus BD+, which is a mandatory protection mechanism that monitors for substitution hacks (such as virtual device drivers that steal content) and enables field-renewable encryption.
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US Launch
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Spring 2006
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Summer 2006
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