- Also known as Blu-Ray Disc (BD)
- Developed by the Blu-Ray Disc Association (BDA) -- this is a group of the world's leading consumer electronics including: Apple, Dell, Hitachi, HP, JVC, LG, Mitsubishi, Panasonic Pioneer, Phillips, Samsung, Sharp, Sony, TDK, and Tomson
- Developed to enable recording, rewriting, and playback of high definition video
- Has five times the storage capacity of a traditional DVD -- can hold up to 25GB on a single layer disc and 50GB on a dual layer disc (Side note: recent development by Pioneer has pushed this to 500GB on a single disc by using 20 layers)
- Advanced audio and video codecs create a better HD experience
- This new format uses a blue-violet laser (CDs and DVDs use a red laser)
- "The benefit of using a blue-violet laser (405nm) is that it has a shorter wavelength than a red laser (650nm), which makes it possible to focus the laser spot with even greater precision. This allows data to be packed more tightly and stored in less space, so it's possible to fit more data on the disc even though it's the same size as a CD/DVD. This together with the change of numerical aperture to 0.85 is what enables Blu-ray Discs to hold 25GB/50GB."
- It however is still backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit
- There was a "format war" in which BD was competing with the HD DVD format. Toshiba announced (Feb. 19, 2008) it would no longer develop or manufacture HD DVD players and recorders essentially ending the war. (http://en.wikipedia.org/wiki/Blu-ray_Disc)
Blu-Ray FAQ's
How a Blu-Ray Disc Works
1 comment:
Nice explanation, I really learned here. I did not understand exactly what this meant "It however is still backwards compatible with CDs and DVDs through the use of a BD/DVD/CD compatible optical pickup unit"
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