The HD (High-Definition) DVD is designed to be the successor to the standard DVD format, and is derived from the same underlying technologies. It can store about 3 1/2 times as much data as its predecessor (Maximum capacity: 30 GB instead of 8.5 GB). A 51gb preliminary spec has been approved. However no movies are currently scheduled to be released on the spec and compatibility with existing players is unknown at this time. The HD DVD standard was jointly developed by Toshiba and NEC.[1] On 19 November 2003, the DVD Forum voted to support HD DVD as the high definition successor of the standard DVD. At this meeting, they also renamed it HD DVD. HD DVD stands for "High Definition Digital Versatile Disc".[2] The format had previously been called the "Advanced Optical Disc" (AOD).
The current specification version for HD DVD-ROM and HD DVD-Rewritable is version 1.0. The specification for HD DVD-R is currently at 0.9; the HD DVD-RAM specification is not yet finalized. The first HD DVD-ROM drives were released in late 2006, and the first HD DVD Recorders were released mid 2007 in Japan.[3]
HD DVD is currently in a format war with rival format Blu-ray Disc.
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