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
Philips CD-i Philips CD-i The Philips CD-i (an abbreviation of Compact Disc Interactive) is an interactive multimedia CD player developed and marketed by Dutch company Philips, who supported it from December 1991 to late 1998. It was created to provide more functionality than an audio CD player or game console, but at a lower price than a personal computer with a CD-ROM drive. The cost savings were due to the lack of a floppy drive, keyboard, mouse, and monitor (a standard television is used), and less operating system software. "CD-i" also refers to the multimedia Compact Disc standard used by the CD-i