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
The Legend of Zelda was developed and released for the Philips CD-i in the early 1990s as a product of a compromise between Philips and Nintendo, after the companies failed to develop a CD-ROM peripheral for the Super NES. Created independently with no observation by or influence from Nintendo, the games are , together with "Zelda's Adventure". Nintendo never acknowledged them in the "Zelda" timeline, and they are considered to be in a separate, self-contained canon. These games are widely acknowledged to be the worst installments in the series. Three "Zelda"-themed LCD games were created between 1989 and 1992. The "Zelda" version of Nintendo's