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(1) See also HD DVR.

(2) (High Definition DVD) A short-lived, high-capacity optical disc that held four hours of HD video on a single-sided, single-layer 15GB disk. Sanctioned by the DVD Forum in 2003, HD DVD gave way to Blu-ray within a few years.

Based on the Advanced Optical Disc (AOD) technology from Toshiba and NEC, HD DVD used a blue-violet laser that read pits half the size of a DVD on tracks more tightly packed. Like Blu-ray, HD DVD supported 1080p resolution and advanced video codecs (see H.264 and VC-1). An advantage for media manufacturers was that, unlike Blu-ray, traditional DVD stamping machines needed only minor modifications to make HD DVDs.

The first HD DVD drives were sold in the U.S. in 2006, and Microsoft offered the drive as an Xbox option. Despite its features and support, in 2008, the majority of movie studios and retail outlets chose Blu-ray over HD DVD, and the "format war" was over.

HD DVD Formats
HD DVD-ROMs were pressed for commercial movies, while HD DVD-Rs were recorded once by the user and HD DVD-RWs were rewritable. A few dual-format HD DVD/Blu-ray players were developed, and hybrid HD DVD/DVD discs were planned. See Blu-ray, HD formats, DVD and DTV.

FULL-SIZE HD DVD (120mm) CAPACITIESSINGLE SIDED     DOUBLE SIDED HD                HDLayers  Storage  Hours    Storage  HoursSingle15GB    4       30GB     8
 Dual      30GB    8
 Triple    51GB   14
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References in periodicals archive ?
While it's clear to most people that buying an HD DVD format player is not a good idea, less clear is whether it's worth it to buy a Blu-ray player.
Additionally, the F45 is equipped with an HDMI port and can be connected to any high definition display or television at home, on the road or in a dorm room to deliver pure HD DVD content without the fear of image degradation.
As well as ending sales of stand alone high-definition machines, Toshiba said it would stop volume production of HD DVD disk drives for computers.
Toshiba said it will continue to provide machines to retailers until the end of March 2008, with technical support to continue to be offered to around 1m people around the world who have purchased HD DVD players and recorders.
The death knell tolled for HD DVD when Warner Bros.
Also available to buy for pounds 19.99 (HD DVD pounds 24.99).
High-definition video will eventually send standard DVDs the way of the laser disc, but there's still the question of whether to go with Blu-ray or HD DVD discs.
Both Target and Blockbuster say they'll keep carrying HD DVD movies to some degree, though.
Attendees had their sights on the 60-inch HD TV, with a surround sound system and a HD DVD player.
Electronics company Toshiba has unveiled a standard height HD DVD drive for the desktop PC, which can read and write to HD DVD and to standard DVD and CD discs.