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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×.
Hitachi-LG Data Storage (HLDS, HL-DT-ST or H-L Data Storage), a joint venture between Hitachi, Ltd. and LG Electronics, is a manufacturer of DVD and Blu-ray optical disc drives [2] for desktop computers and laptops. Founded in late 2000, the company began operation in January 2001. [3] In 2006, HLDS began developing Blu-ray Disc drives. [4]
DVD lens supports a different focus for CD or DVD media with same laser. With the newer Blu-ray Disc drives, the laser only has to penetrate 0.1 mm of material. Thus the optical assembly would normally have to have an even greater focus range. In practice, the Blu-ray optical system is separate from the DVD/CD system.
Internal optical disc drive from LG playing both, HD DVD and Blu-ray disks In 2007, LG and Samsung released standalone consumer players that could read both HD DVD and Blu-ray Discs. [ a ] The machines were sold at premium prices, but failed to sell in large quantities.
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).
BD-R LTH is a write-once Blu-ray Disc format that features an organic dye recording layer. "Low To High" refers to the reflectivity changing from low to high during the burning process, which is the opposite of normal Blu-rays, whose reflectivity changes from high to low during writing.
Most internal drives are designed with SATA interfaces, with parallel ATA becoming increasingly rare. External drives often use the USB standard for connectivity. DVD recorder drives manufactured since January 2000 are required by the DVD consortium to respect DVD region codes when reading a disc. The drives are incapable of assigning region ...
As a result, the market switched over to Parallel ATA connections for most internal drives; external drives generally use PATA drive mechanisms connected to a bridge inside the case that connects to a high-speed serial bus such as FireWire or Hi-Speed USB 2.0. Nearly all modern drives, particularly Blu-ray drives use Serial ATA.
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