Notes

Points You Should Have Knowledge Of Blu-Ray Technology



Yes, it's ray not the blue-ray. The letter 'e' was intentionally avoided to make it ideal for trademarking. Company, the Blu-ray is more advanced and better when compared to a DVD. Everyone was very excited when DVDs has been around since in 1997 which made it possible playing digital audio/video even just in our homes. Now, folks are speaking about the new technology that's even superior to DVDs that had become in the year 2006.





After VCR's and DVDs, advances in technology brought us Blu-ray technology. The name blu-ray is derived from the reality that a blue (actually blue-violet) laser is utilized for reading and writing Blu disc.ray technologies are not an achievement associated with a single company. A group of prominent manufacturers like Apple, Dell, Sony, Sun Microsystems etc formed ray Disc Association which developed fraxel treatments.

Blu-ray discs can beat DVDs within the following factors:

(a) More storage capacity A single-sided standard 12 cm DVD can store 4.7 GB of knowledge whereas exactly the same size single layer ray disc can store 25 GB of knowledge which is almost half a dozen times greater DVD. A dual layer ray disc can store 50 GB of knowledge. Much like DVDs we are able to get mini size ray discs also using the size of 8 cm. This mini disc with single layer capacity can store 7.8 GB and dual layer capacity can store 15.6 GB.
(b) Higher data transfer useage rate of 36 Mbps and,
(c) Audio and video are tinkered with more clarity in comparison with DVD.

The following are the standards which can be responsible to embed more data right into a ray disc:

(a) Unlike DVDs which depend upon red lasers operating at 650 nm for reading and writing data, Blu-ray discs depend on blue laser that operates at 405 nm. Because the ray technology is with all the short wavelength laser in comparison with DVD, it might embed more data to the disc which has precisely the same size of a DVD.
(b) The thickness of canopy layer was decreased.
(c) Numerical aperture was increased to 0.85.

Different formats of ray disc:

(a) BD-R: Recordable format for HD video recording and PC data storage.
(b) BD-ROM: Read only format for pre-recorded contents like high definition movies, games.
(c) BD-RW: Rewritable format for PC data storage.
(d) BD-RE: Rewritable format for HD video recording and PC data storage.

The exclusive features of Blu-ray players are:

*You can create the playlists.
*You could make changes to the recorded video and shuffle their order.
*You can record high-definition television (HDTV) with improved sound and movie qualities.
*You can record a program while playing another.
*The player automatically pursuit of the empty space to record new programs about the disc in order to avoid overlapping of programs.
*You can randomly head to any point around the disc.


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