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Disc capacities are 25 GB for single-layer discs, 50 GB for double-layer discs, [1] 100 GB ("XL") for triple-layer, and 128 GB for quadruple-layer (in BD-R only). [ 2 ] [ 3 ] The minimum speed at which a Blu-ray Disc can be written is 36 megabits (4.5 megabytes) per second.
Blu-ray Disc recordable" (BD-R) refers to two optical disc formats that can be recorded with an optical disc recorder. BD-Rs can be written to once, whereas Blu-ray Disc Recordable Erasable (BD-REs) can be erased and re-recorded multiple times. The current practical maximum speed for Blu-ray Discs is about 12× (54 MB/s).
This list includes both CD, DVD and Blu-ray recordable and rewritable media manufacturers (like Ritek), and disc replicators (companies that replicate discs with pre-recorded content, like Sony DADC).
Some may say that 50GB of space for a single movie is way too much and is completely useless. Some may be right, but that doesn't make such things cease to exist. Face it -- 50GB Blu-ray movies ...
M-Discs are readable by most regular DVD players made after 2005, and Blu-Ray and BDXL disc drives and writable by most made after 2011. [9] Available recording capacities conform to standard DVD/Blu-ray sizes: 4.7 GB DVD-R to 25 GB BD-R, 50 GB BD-R and 100 GB BDXL.
The first 50 GB dual-layer Blu-ray Disc release was the movie Click, which was released on October 10, 2006. As of July 2008, over 95% of Blu-ray movies/games are published on 50 GB dual layer discs with the remainder on 25 GB discs. [10] 85% of HD DVD movies are published on 30 GB dual layer discs, with the remainder on 15 GB discs. [11] [12]
For Blu-ray discs, 1× speed is defined as 36 megabits per second (Mbit/s), which is equal to 4.5 megabytes per second (MB/s). [7] However, as the minimum required data transfer rate for Blu-ray movie discs is 54 Mbit/s, the minimum speed for a Blu-ray drive intended for commercial movie playback should be 2×. The fastest Blu-ray speed is 16×.
On 16 August 2006 Sony announced shipment of 50 GB dual-layer Blu-ray Disc recordable discs with a suggested retail price of $48. [23] On 4 January 2008, Warner Bros. announces that it would abandon HD-DVD support by the end of May. On 5 January 2008, New Line Cinema announced it would be following Warner's lead, backing Blu-ray exclusively.
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