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Learn about the data contained in a CD in addition to audio or user data, which is used for control and playback of the CD. The subcode is multiplexed with the digital audio or user data and consists of eight subchannels (P to W) with different modes and functions.
Learn about the invention, development and evolution of the CD player, an electronic device that plays audio compact discs, a digital optical disc data storage format. Find out how Sony and Philips collaborated to create the standard CD format and how CD players have changed over time.
Learn about the development and evolution of the compact disc, a digital optical disc data storage format for audio and data. Find out how CD was invented by Philips and Sony, and how it became the dominant music format until the rise of MP3 and other downloadable music.
Some portable CD players can play CD-R/CD-RW discs and some can play other formats such as MP3-encoded audio. While audio typically is output via a headphone connector, higher-end models may feature an additional integrated speaker. The 8 cm CD provides a smaller alternative to the normal 12 cm CD (although with a lower capacity). Miniature ...
Learn about the history, technology and standards of CD-DA, the format for audio compact discs. Find out how CD-DA evolved from LaserDisc and other optical media, and how it became the dominant music format in the 1980s and 1990s.
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CD-Cops Requires the user to enter CD-code (or reads embedded CD-code) that describes geometry of CD to correctly locate data on the disc. SafeDisc (versions 1–5) Adds unique digital signature at the time of manufacturing which is designed to be difficult to copy or transfer so that software is able to detect copied media. SafeCast
CD players are often a part of home stereo systems, car audio systems, and personal computers. They are also manufactured as portable devices. Modern units can play other formats in addition to PCM audio coding used in CDs, such as MP3, AAC and WMA. DJs often use players with an adjustable playback speed to alter the pitch and tempo