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 Console lineup. Games that were most heavily criticized include "Hotel Mario", "", "", and "Zelda's Adventure". EGM's Seanbaby rated "The Wand of Gamelon" as one of the worst video games of all time. However, "" was positively received by critics, and has often been held up as the standout title for the CD-i. In October 1994 Philips claimed an installed base of 1 million units for the CD-i. In 1996, the Wall Street Journal reported that total US sales amounted to 400,000 units. Philips CD-i The Philips CD-i (an abbreviation of Compact Disc Interactive) is an interactive multimedia CD player