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CD Stands for: Compact Disc Terminology | Dictionary | Explanation A CD is an one-sided optical disc used to store digital data, which can hold up to 650-700Mb of data. It was originally developed for storing digital audio. An audio CD consists of one or more stereo tracks stored using 16-bit PCM coding at a sampling rate of 44.1 kHz. The technology was later adapted for use as a data storage device, known as a CD-ROM, and to include record-once and re-writable media (CD-R and CD-RW respectively). The UDF format is used on user-writable CD-R and CD-RW discs that are intended to be extended or overwritten. The first CD was ABBA - The Visitor, released on the 17th of August 1982. Originally, there was no standard copy protection. In 2002, attempts were made by record companies to market "copy-protected" non-standard compact discs, which cannot be ripped (copied) to hard drives or easily converted to MP3s. One major drawback to these copy-protected discs is that most will not play on computer CD-ROM drives, they might even let the system crash. Apart from computers, this can also happen on standalone cd-players, as some standalone CD players that use CD-ROM mechanisms. Halfway 2007, the major record labels stopped using copy protection on their cds, simply because it was not profitable. The costs of investments and productions costs were too high in relation to the benefits. |
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