How does a DVD player read a disc?
The DVD Player DVD Fact The Sony PlayStation 2 was the first video game system able to play DVDs. A DVD player is very similar to a CD player. It has a laser assembly that shines the laser beam onto the surface of the disc to read the pattern of bumps (see How CDs Work for details). The DVD player decodes the MPEG-2 encoded movie, turning it into a standard composite video signal (see How Television Works for details). The player also decodes the audio stream and sends it to a Dolby decoder, where it is amplified and sent to the speakers. The DVD player has the job of finding and reading the data stored as bumps on the DVD. Considering how small the bumps are, the DVD player has to be an exceptionally precise piece of equipment. The drive consists of three fundamental components: * A drive motor to spin the disc – The drive motor is precisely controlled to rotate between 200 and 500 rpm, depending on which track is being read. * A laser and a lens system to focus in on the bumps and re
