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The Evolution of Blu-Ray - Just how the Blu-Ray Disc Came To Be
It's an intriguing story, with many major battles thrown set for good measure, a story that may be worth reading even though you're not really a tech junkie.
To be able to truly understand Blu-ray, you have to return to the earlier 80's when CDs or Compact Discs were introduced. CDs were a giant leap forward in the event you compared it to the present media back then; for the reason that the CD offered more storage, better audio quality and quickly took over as the universal standard for pre-recorded, recordable and rewritable media. CDs had around 650MB of storage capacity which has been revolutionary during the time for data storage and retrieval.
However, no technology stands still, especially if you think about our insatiable desire for more compact storage and higher quality images. Hence, we had the growth of the DVD inside the 90's which had a 5-10 X surge in capacity on the CD. The DVD allowed for high quality, standard definition video distribution and recording, not forgetting accommodating larger data application. Another key element to this very seamless transition, was that the DVD spec used the exact same factor as the CD which allowed for full backwards compatibility. These key factors would not be lost about the development over the following generation media; this being the Blu-ray Disc.
The beginnings from the Blu-ray began in the mid '90's with the creation of HDTV sets. Consumers soon realized there seemed to be no media able to recording or playing back Hd
content. There were no mediums that could store HD codecs, except for JVCs Digital VHS and Sony's HDCAM; but nothing practical just like the CD and DVD media.
However, it absolutely was known that using lasers with shorter wavelengths you could create optical storage with higher density. Using this type of knowledge, Shuji Nakamura invented practical blue laser diodes. Its commercial use was delayed by a patent lawsuit, but eventually the Blu-ray disc became available and the next step during the evolution of storage media began.
The Real Difference: The advantages of Blu-ray Discs versus DVDs.
Although blu-ray disc are the same physical scale of a DVD or CD, they are designed for storing and reading a great deal more data. The explanation for this is certainly its utilization of a blue laser instead of the red laser utilized by DVDs and CDs. The blue laser has a shorter wavelength, a smaller aperture lens as well as a thinner cover layer for the disc that assists you to create a smaller beam spot size capable
of storing and reading a great deal more data for the disc.
Of course, no discussion would be complete without mentioning the particular heated battle in between the two opposing technologies: Blu-ray vs HD-DVD. Each disc format have major backers, behind Blu-ray stands Sony, Dell, Hitachi, Hewlett-Packard, Panasonic, Pioneer, Philips, Samsung... and backing HD-DVD now we have Toshiba, NEC and many major movie studios Universal Studios, Paramount Pictures, Warner Bros and New Line Cinema.
Although many believe Blu-ray has won the battle and will probably end up being the dominant hd technology. (Beta anyone?) The primary argument being storage area, since Blu-ray offers 25 GB for single-layer and 50 GB for dual-layer; this is certainly as compared to HD-DVD that gives 15 GB for single-layer and 30 GB for dual-layer.