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Yes, it is ray not the blue-ray. The letter ‘e’ was intentionally avoided to make it suitable for trademarking. E-mail, the Blu-ray is more advanced far better than the usual DVD. Every one was excited when DVDs came into existence in 1997 making it possible playing digital audio/video even in our homes. Now, individuals are speaking about the newest technology which can be even better than DVDs that launched 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 can be used to read and writing Blu disc.ray technologies are no achievement associated with a single company. Several prominent companies like Apple, Dell, Sony, Sun Microsystems etc formed ray Disc Association which developed fractional laser treatments.

Blu-ray discs can be better than DVDs from the following factors:

(a) More storage capacity A single-sided standard 12 cm DVD can store 4.7 GB of internet data whereas the same size single layer ray disc can store 25 GB of internet data which can be almost 5 times greater DVD. A dual layer ray disc can store 50 GB of information. Just like DVDs we can get mini size ray discs also with all the height and width 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 bandwith rate of 36 Mbps and,

(c) Video and audio are tinkered with more clarity in comparison with DVD.

The following are the standards that are responsible to embed more data in to a ray disc:

(a) Unlike DVDs which be determined by red lasers operating at 650 nm for reading and writing data, Blu-ray discs rely on blue laser that operates at 405 nm. Since the ray technologies are while using the short wavelength laser in comparison to DVD, it might embed more data into the disc which has the same sized a DVD.

(b) The thickness of cover 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 videos and PC data storage.

The exclusive features of Blu-ray players are:

*You can make the playlists.

*You can make changes for 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 one more.

*The player automatically pursuit of the empty space to record new programs around the disc in order to avoid overlapping of programs.

*You can randomly visit any point about the disc.

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