commonly called as BD is the name of the next generation optical media disc format that was specifically designed to support the latest high definition video and audio technologies.
The Blu-ray Disc Association (BDA), a group representing electronics, computer hardware and motion picture production companies, introduced Blu-ray in 2006.
Blu-ray discs can hold large quantities of high-definition video and audio, computer data and other digital content. The capacity of single-layer BD is 25 GB while that of normal DVD is just 4.7 GB. That means, a Blu-ray Disc can hold as much data as 5.5 times that of DVD.

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