![]() ![]() ![]() In 1979, Sony and Philips set up a joint task force of engineers to design a new digital audio disc. Prototypes were developed by Philips and Sony independently in the late 1970s. Is used that enables the high information density required for high-quality digital audio signals. The Compact Disc is an evolution of LaserDisc technology, where a focused laser beam Following litigation, Sony and Philips licensed Russell's patents (then held by a Canadian company, Optical Recording Corp.) in the 1980s. Russell's patent application was first filed in 1966, and he was granted a patent in 1970. Russell is known for inventing the first system to record digital information on an optical transparent foil that is lit from behind by a high-power halogen lamp. CD playback functionality is also available on CD-ROM/DVD-ROM drive equipped computers as well as on DVD players and most optical disc-based home video game consoles.Ī JVC FS-SD5R CD player from the 1990s with a transparent plastic cover and blue backlightĪmerican inventor James T. Audio engineers using CD players to play music for an event through a sound reinforcement system use professional audio-grade CD players. DJs playing dance music at clubs often use specialized players with an adjustable playback speed to alter the pitch and tempo of the music. Modern units can play audio formats other than the original CD PCM audio coding, such as MP3, AAC and WMA. To listen to music using a CD player with a headphone output jack, the user plugs headphones or earphones into the headphone jack. To use a CD player in a home stereo system, the user connects an RCA cable from the RCA jacks to a hi-fi (or other amplifier) and loudspeakers for listening to music. Most CD players produce an output signal via a headphone jack or RCA jacks. CD players may be part of home stereo systems, car audio systems, personal computers, or portable CD players such as CD boomboxes. CDs typically contain recordings of audio material such as music or audiobooks. CD players were first sold to consumers in 1982. A CD player is an electronic device that plays audio compact discs, which are a digital optical disc data storage format.
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