CD player in 1970. Following litigation, Sony and Philips licensed Russell's patents (then held by a Canadian company, Optical Recording Corp.) in the 1980s. The Compact Disc is an evolution of LaserDisc technology, where a focused laser beam is used that enables the high information density required for high-quality digital audio signals. Prototypes were developed by Philips and Sony independently in the late 1970s. In 1979, Sony and Philips set up a joint task force of engineers to design a new digital audio disc. After a year of experimentation and discussion, the "Red Book" CD-DA standard was published in 1980. After their
60s 70s 80s 60s 70s 80s 60s 70s 80s is a triple A-side single, Namie Amuro's 33rd solo single under the Avex Trax label. It was released in CD and CD&DVD formats on March 12, 2008, 11 months since her previous single "Funky Town", and nearly nine months after her successful album "Play". This single continues her successful comeback, as it had her highest first week sales since 2000's "Never End" even at a time when CD single sales are dramatically decreasing. It became her first #1 since 1998's "I Have Never Seen", and her highest selling single since "Never End". "60s 70s