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3D optical data storage, which has multiple layers of media and thus stores multiples of Blu-ray capacity; 5D optical data storage which is primarily aimed at long-term data storage on the order of thousands of years; Near-field optics; Solid immersion optics (allowing an extremely high numerical aperture).
Comparison of various optical storage media. This article compares the technical specifications of multiple high-definition formats, including HD DVD and Blu-ray Disc; two mutually incompatible, high-definition optical disc formats that, beginning in 2006, attempted to improve upon and eventually replace the DVD standard.
As of 2007 DVD is the de facto standard for pre-recorded movies, and popular storage of data beyond the capacity of CD. With the development of high-definition television , and the popularization of broadband and digital storage of movies, a further format development took place, again giving rise to two camps: HD DVD and Blu-ray , based upon a ...
HD DVD-R is the writable disc variant of HD DVD, available with a single-layer capacity of 15 GB or a dual-layer capacity of 30 GB. [95] Write speeds depend on drive speed, with a data rate of 36.55 Mbit/s (4.36 MB/s) and a recording time of 56 minutes for 1× media, and 73 Mbit/s (8.71 MB/s) and a recording time of 28 minutes for 2×.
Consumer-grade high definition players required an inexpensive storage medium capable of holding the larger amount of data needed for HD video. [4] The breakthrough came with Shuji Nakamura 's invention of the blue laser diode , whose shorter wavelength opened the door to higher density optical media following a six-year patent dispute .
The optical disc standard Blu-ray Disc can provide enough digital storage to store hours of HD video content. Digital Versatile Discs or DVDs (that hold 4.7 GB for a Single layer or 8.5 GB for a double layer), are not always up to the challenge of today's high-definition (HD) sets.
An Ultra Density Optical disc, or UDO, is a 133.35 mm (5.25") ISO cartridge optical disc which can store up to 30 GB (gigabytes) of data. The second generation UDO2 media format was introduced in April 2007 and has a capacity of up to 80 GB.
Current optical data storage media, such as the CD and DVD store data as a series of reflective marks on an internal surface of a disc. In order to increase storage capacity, it is possible for discs to hold two or even more of these data layers, but their number is severely limited since the addressing laser interacts with every layer that it passes through on the way to and from the ...
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