Thursday, July 30, 2009

Blu-ray Disc

Blu-ray Disc (also known as Blu-ray or BD) is an optical disc storage medium designed to supersede the standard DVD format. Its main uses are for storing PlayStation 3 games, high-definition video, and data storage, with up to 25 GB per single layered, and 50 GB per dual layered disc. The disc has the same physical dimensions as standard DVDs and CDs.

The name Blu-ray Disc derives from the blue-violet laser used to read the disc. While a standard DVD uses a 650 nanometre red laser, Blu-ray uses a shorter wavelength, a 405 nm blue-violet laser, and allows for almost six times more data storage than on a DVD.

During the format war over high-definition optical discs, Blu-ray competed with the HD DVD format. Toshiba, the main company supporting HD DVD, ceded in February 2008, and the format war ended, then in July 2009, announced plans to put out its own Blu-ray Disc device by the end of 2009.

Blu Ray Disc

- Media type High-density optical disc Encoding MPEG-2, H.264/MPEG-4 AVC, and VC-1

- Capacity 25 GB (single-layer).
- 50 GB (dual-layer) Block size 64kb ECC Read mechanism 405 nm laser:
- 1× at 36 Mbit/s (4.5 MByte/s)
- 2× at 72 Mbit/s (9 MByte/s)
- 4× at 144 Mbit/s (18 MByte/s)
- 6× at 216 Mbit/s (27 MByte/s)
- 8× at 288 Mbit/s (36 MByte/s)
- 12× at 432 Mbit/s (54 MByte/s) Usage Data storage
- High-definition video

- High-definition audio

PlayStation 3 games


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