Designed as the successor to the standard DVD optical disk and principally supported by Toshiba, HD DVD could store about three times as much data as its predecessor; 15 GB single layer, 30 GB dual layer. Often called 3x DVD as it has three times the bandwidth (1x@36Mb/s and 2x@72Mb/s) and storage, it was discontinued in 2008, leaving just Sony’s Blu-ray Disc in the market.

See also: DVD, Optical disks

Website: www.dvdforum.org