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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, it gave way to Blu-ray in 2008.

HD DVD was based on the Advanced Optical Disc (AOD) technology from Toshiba and NEC and used a blue-violet laser that read pits half the size of a DVD on tracks packed tighter together. 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
Used for commercial movies, HD DVD-ROMs were pressed and read only. HD DVD-Rs were recorded once by the user, and HD DVD-RWs were rewritable. Hybrid HD DVDs were announced with HD DVD on one side and DVD on the other. In an attempt to resolve competition, dual-format HD DVD/Blu-ray players were also developed (see "Blu-ray History" in Blu-ray). See 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
References in periodicals archive ?
Along with the superior image quality made possible by HD DVD, Microsoft's HDi technology delivers an unprecedented and unique level of content interactivity that will change how people watch and experience movies.
HD DVD is the only next-generation, post-DVD standard for high-capacity, high-definition optical discs, approved and supported by the DVD Forum.
In 2006, Warner Home Video released The Forbidden Planet Ultimate Collector's Edition HD DVD and will continue to release Ultimate Collector's Edition HD DVDs and Blu-ray Discs to meet high definition and collector consumer needs.
Wal-Mart, the largest US retailer, said it will sell only Blu-ray DVDs and hardware and no longer carry HD DVD offerings, and Warner Brothers decided to release movie discs only in the Blu-ray format, becoming the latest studio to reject HD DVD.
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.
Verbatim 2x-speed HD DVD-R/RW Media -- At 2x-speed Verbatim's new recordable and rewriteable HD DVDs slash the time required to fill a 15GB HD DVD disc to about 30 minutes, compared to about 1 hour at 1x speed.
It takes advantage of the shared physical structure of HD DVD and standard DVD disks.
It is fighting for dominance with HD DVD, a format backed by Toshiba Corp.
Both Blu-ray and HD DVD formats were developed to enable recording and playback of high-definition video (including enhanced sound and a range of interactive features like pictures within pictures and links to the Internet), as well as storage of huge amounts of data.
On February 19, 2008, Toshiba announced that it was abandoning support for the HD DVD (High Definition DVD) standard; this decision by Toshiba has put an end to the uncertainty that had clouded the outlook for the next-generation optical storage market.
has launched the Xbox 360 HD DVD Emulator, enabling film studios and disc authoring companies to model the behavior of HD DVD disc content, including encoded video and HDi interactivity, in a virtual environment before committing to burning a single HD DVD disc.
The HD-XA1 player, based on the HD DVD format, was put on sale in Japan for about 110,000 yen (about $936).