HD-DVD

A special case of nanocrystal that is comprised of a semiconductor is known as a quantum dot Typically, the dimensions of these nanostructures lie in the range 1-30 nm, based on its composition (see below). Quantum dots currently find applications as sensors, lasers, and LEDs. In fact, new high-density disks (e.g., HD-DVD and Blu-ray high-definition DVD formats) may only be read via blue lasers, which... 

LG releases the first dual HD-DVD/Blu-ray high-definition player... 

Explain why HD DVDs can store more information than regular DVDs. 

As blue diode lasers became available on a large scale [10], a new generation of storage disks with further increased storage capacity was developed by the Blu-ray Disc Association and by Toshiba and NEC within the DVD Forum [4j. As can be seen in Table 12.1, a HD-DVD holds 15 GB and BDs hold 25 GB (singlelayer DB) or 50 GB (dual-layer BD). Figure 12.3 shows, as a typical example, the cross-section of a novel disk type having a triple-layer structure one BD layer and a dual DVD layer to be read by a blue and a red laser, respectively. 

McDonald, Paul. Video and DVD Industries. London British Film Institute, 2008. Ebramines the husiness of video entertainment and details divisions of the video business. It outlines industry battles over incompatible formats, from the Betamax-VHS war to competing laser disc systems, alternatives such as video compact disc or Digital deo Express, and the introduction of HD DVD and Blu-ray high-def-inition systems. 

LG releases the first dual HD-DVD/Blu-ray high-definition player D-wave Systems, Inc. unveils the world s first commercially-viable quantum computer... 

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