HD-DVD and Blu-ray discs
These two competing formats are expected to replace current
DVD as the standard for watching movies at home. On one side
are Toshiba, Microsoft and the DVD Forum, who support the
High Definition-DVD (HD-DVD). Sony, Panasonic, Samsung,
JVC and many movie studios are behind the Blu-ray format.
A Blu-ray disc has a capacity of 25 GB (single layer), 50 GB
(dual layer) and 100 GB (four layer). Unlike DVDs, which use a
red laser to read and write data, Blu-ray uses a blue-violet laser,
hence its name. Blu-ray discs can record and play back high-
definition television and digital audio, as well as computer data.
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