Modern digital recording began with the introduction of the CD or compact disc. It was co-developed by Philips and Sony and released in 1982.
It was in 1982, in Japan, that the first CD players using laser beams to scan the discs were released. DVD and Blue-rays were introduced later.
The DVD, or digital video disc, was co-developed by Philips and Sony in 1995. A DVD is a type of optical disk technology, similar to the CD-ROM. It holds a minimum of 4.7 GB of data, enough for a full-length movie.
The Blu-ray or Blu-ray Disc was designed to supersede the DVD format. The Blu-ray Disc format was developed by the Blu-ray Disc Association (BDA). Sony unveiled the first Blu-ray Disc prototypes in October 2000.
The name ‘Blu-ray’ refers to the blue laser (actually a violet laser) used to read the disc.
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