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[7] [8] It is debatable whether Russell's concepts, patents, and prototypes instigated and in some measure influenced the compact disc's design. [9] The compact disc is an evolution of LaserDisc technology, [10] where a focused laser beam is used that enables the high information density required for high-quality digital audio signals. Unlike ...
During glass mastering, glass is used as a substrate to hold the CD master image while it is created and processed; hence the name. Glass substrates, noticeably larger than a CD, are round plates of glass approximately 240 mm in diameter and 6 mm thick. [2] They often also have a small, steel hub on one side to facilitate handling. The ...
Most longboxes were full color, with details about the compact disc on the back, and artwork that was frequently taken from the original square album cover art, reworked for the new shape and size. There were generic white longboxes with windows that would display the compact disc cover, as well as clear plastic versions that were an ...
A jewel case is a compact disc case that has been used since the compact disc was first released in 1982. It is a three-piece plastic case, measuring 142 by 125 by 10 millimetres (5.59 in × 4.92 in × 0.39 in), a volume of 177.5 cubic centimetres (10.83 cu in), which usually contains a compact disc along with the liner notes and
Compact Disc Digital Audio (CDDA or CD-DA), also known as Digital Audio Compact Disc or simply as Audio CD, is the standard format for audio compact discs. The standard is defined in the Red Book technical specifications , which is why the format is also dubbed "Redbook audio" in some contexts. [ 1 ]
The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data. While optical discs are generally more reliable and durable than older media types, (magnetic tape, LPs and other records) environmental conditions and/or poor handling can result in lost information.
The Blue Book is a compact disc standard that defines the Enhanced Music CD format, which combines audio tracks and data tracks on the same disc. E-CD/CD+/CD Extra ( Enhanced ) [ 21 ] – a standard jointly developed and published by Microsoft , Philips and Sony
CD-R (Compact disc-recordable) is a digital optical disc storage format. A CD-R disc is a compact disc that can only be written once and read arbitrarily many times. CD-R discs (CD-Rs) are readable by most CD readers manufactured prior to the introduction of CD-R, unlike CD-RW discs.