Yes, it is ray not the blue-ray. The letter 'e' was intentionally avoided to really make it suitable for trademarking. And yes, the Blu-ray is a lot more advanced and better when compared to a DVD. Everybody was so excited when DVDs launched in 1997 making it possible playing digital audio/video even just in our homes. Now, folks are talking about the brand new technology that's even finer quality 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 hails from the truth that a blue (actually blue-violet) laser is employed with and writing Blu disc.ray technology is no achievement from a single company. Several prominent the likes of Apple, Dell, Sony, Sun Microsystems etc formed ray Disc Association which developed this technology.
Blu-ray discs can beat DVDs inside the following factors:
(a) More storage capacity A single-sided standard 12 cm DVD can store 4.7 GB of information whereas precisely the same size single layer ray disc can store 25 GB of data that's almost five times regarding green DVD. A double layer ray disc can store 50 GB of internet data. Much like DVDs we can get mini size ray discs also together with 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 data transfer useage rate of 36 Mbps and,
(c) Video and audio are enjoyed more clarity in comparison with DVD.
Listed here are the factors that happen to be responsible to embed more data right into a ray disc:
(a) Contrary to DVDs which depend on red lasers operating at 650 nm to read and writing data, Blu-ray discs depend upon blue laser that operates at 405 nm. Since the ray technology is while using the short wavelength laser when compared with DVD, it may embed more data into the disc which has 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 hi-def 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 produce the playlists.
*You may 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 an application while playing another.
*The player automatically searches for the empty space to record new programs about the disc to stop overlapping of programs.
*You can randomly go to any point for the disc.
More details about blu-ray cover web page: read here.