Sony and Phillips Premier Compact Disc
January 1, 1977
Sony and Phillips premier the first compact laser disc in conjunction with a set of encoding parameters. Unlike the audio cassette, which relied on magnetic tape, or the laser disc which was an analog technology, CD’s were the first time a disc had information encoded digitally on them. The ability for CD’s to ‘skip’ tracks, unlike Casettes, and their relative portability and relatively high fidelity 44 KHz at 16bit resolution made them a staple of music distribution for decades, until they were replaced by mp3 players and later streaming services.
Peek, Hans. "The Emergence of the Compact Disc." Communications Magazine, IEEE, January 22, 2010, 10-17.