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HD DVD or High-Definition Digital Versatile Disc is a high-density optical disc format with the same dimensions as a standard DVD or CD. Designed for the storage of data and high-definition video; the HD DVD format improves drastically upon the technological foundation of standard DVDs mainly by removing the common red laser reader of a standard DVD player and replacing it with a blue laser. Blue lasers scan data using shorter wavelengths than red lasers, therefore three times more data can be stored on an HD DVD disc allowing you to experience a high definition image with augmented sound quality and interactive user options.
The HD DVD technology, developed primarily by Toshiba, was challenged in a format war with its direct rival Blu-Ray. At war to decide which format would be the leading carrier for high definition information to consumers, HD DVD lost the support of major content manufacturers as well as influential retailers. Toshiba has since abandoned the format thus making Blu-Ray the standard disc format for high definition video.
Specifications
- Disc resolution: Up to 1080p
- Surround sound: Up to 7.1 discrete channels
- Disc diameter: 120 mm
- Disc structure: 0.6 mm x 2 substrates
- Interactive, mandatory hardware support: Secondary video decoder, persistent storage, networking capabilities
- Capacity (single-sided, single-layer): 15 GB
- Capacity (single-sided, dual-layer): 30 GB
- Combo disc capacity (double-sided): 30 GB / 9 GB
- Recording time: 30 GB, HD resolution over 8 hours
- Laser wavelength: 405 nm (blue laser)
- Compression technology supported (codecs): VC-1/MPEG-4 AVC/MPEG-2
- User bit rate: 32.4 Mbps
- Track pitch: .40 µm
- Security: Optional HDCP encrypted output, volume identifier layer (physical layer) and Advanced Access Content System (AACS)
For more information on the HD-DVD format, please visit Wikipedia: http://en.wikipedia.org/wiki/Hd_dvdThis Link Will Open A New Window
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