What is Blu-ray Disc
Is also called Blue-Ray or BD. It is an optical disc storage media format. High definition video and data storage are its main uses. The dimensions are the same as of the standard DVD or CD. It is derived from the blue laser that is used to read or write discs.
The 405mm shorter wave length allows it to store more data than DVD format that used 650 mm red laser. The capacity of a 50GB dual blue-ray is six times greater DVD dual layer.
Introduction to Blu-ray Discs
In 1997, a new technology emerged that brought digital sound and video into homes all over the world. It was called DVD, and it revolutionized the movie industry.
The industry is set for yet another revolution with the introduction of Blu-ray Discs (BD) in 2006. With their high storage capacity, Blu-ray discs can hold and play back large quantities of high-definition video and audio, as well as photos, data and other digital content.
A current, single-sided, standard DVD can hold 4.7 GB of information. That's about the size of an average two-hour, standard-definition movie with a few extra features. But a high-definition movie, which has a much clearer image, takes up about five times more bandwidth and therefore requires a disc with about five times more storage. As TV sets and movie studios make the move to high definition, consumers are going to need playback systems with a lot more storage capacity.
Blu-ray is the next-generation digital video disc. It can record, store and play back high-definition video and digital audio, as well as computer data. The advantage to Blu-ray is the sheer amount of information it can hold: