Blu-ray Disc

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Blu-ray Disc
Blu-ray Disc.svg
Reverse side o a Blu-ray Disc
Media type Heich-density optical disc
Encodin H.262/MPEG-2 Part 2
H.264/MPEG-4 AVC
VC-1
Capacity 25 GB (single-layer)
50.1 GB (dual-layer)
100.1/128 GB (BDXL)
Block size 64 kb ECC
Read mechanism 405 nm diode laser:
1× @ 36 Mbit/s (4.5 MB/s)
Developed bi Blu-ray Disc Association[1]
Dimensions 120 mm diameter (4,72 in)
1.2 mm thickness[2]
Uisage Data storage
Heich-defineetion video (1080p)
Heich-defineetion audio
Stereoscopic 3D
PlayStation 3 gemmes
Futur PlayStation 4 gemmes
Futur Xbox Ane gemmes

Blu-ray Disc (BD) is an optical disc storage medium designed tae supersede the DVD format. The plastic disc is 120 mm in diameter an 1.2 mm thick, the same size as DVDs an CDs. Conventional (pre-BD-XL) Blu-ray Discs contain 25 GB per layer, wi dual layer discs (50 GB) bein the industry staundart for featur-length video discs. Triple layer discs (100 GB) an quadruple layers (128 GB) are available for BD-XL re-writer drives.[3] The name Blu-ray Disc refers tae the blue laser uised tae reid the disc, which allaes information tae be stored at a greater density than is possible wi the langer-wavelength reid laser uised for DVDs. The major application o Blu-ray Discs is as a medium for video material such as featur films. Besides the hairdware specifications, Blu-ray Disc is associatit wi a set o multimedia formats. Generally, these formats allae for the video an audio tae be stored wi greater defineetion than on DVD.

The format wis developed bi the Blu-ray Disc Association, a group representin makers o consumer electronics, computer hairdware, an motion picturs. The first Blu-ray Disc prototypes wur unveiled in October 2000, an the first prototype player wis released in Aprile 2003 in Japan. Efterwairds, it continued tae be developed till its offeecial release in Juin 2006. As o June 2008, mair than 2,500 Blu-ray Disc teetles wur available in Australie an the Unitit Kinrick, wi 3,500 in the Unitit States an Canadae.[4] In Japan, as o July 2010, mair than 3,300 titles hae been released.[5]

Durin the heich defineetion optical disc format war, Blu-ray Disc competit wi the HD DVD format. Toshiba, the main company that supportit HD DVD, concedit in Februar 2008,[6] releasin its awn Blu-ray Disc player in late 2009.[7]

References[eedit | eedit soorce]

  1. Blu-ray FAQ. Blu-ray.com. Retrieved on 2010-12-22.
  2. http://www.blu-ray.com/faq/#bluray_vs_dvd_comparison
  3. http://www.bit-tech.net/hardware/2011/02/23/pioneer-bdxl-bdr-206-review/1
  4. "Now Available". Blu-ray.com. Retrieved October 22, 2008. 
  5. "Blu-ray/HD DVD releases in Japan". AV Watch. Retrieved August 26, 2010. 
  6. "Toshiba Announces Discontinuation of HD DVD Businesses" (Press release). Toshiba. February 19, 2008. Retrieved February 26, 2008. 
  7. Yomiuri Shimbun. Page 1. July 19, 2009. Ver. 13S.

Freemit airtins[eedit | eedit soorce]