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
Obbe Philips Obbe Philips Obbe Philips (ca. 1500–1568) (also spelled "Philipsz" and "Filips") was one of the early founders of Dutch Anabaptism. He was the illegitimate son of a Roman Catholic priest from Leeuwarden. Philips studied medicine, and became a barber and a surgeon. He married in 1530 and set up his business in Leeuwarden. Obbe Philips became interested in the Reformation, and converted to Anabaptism late in 1533. He was probably baptized by Bartholomeus Boekbinder or Willem de Kuyper, emissaries of Jan Matthys. Menno Simons was ordained around 1537 by Obbe Philips, and was probably baptized earlier by Philips also. Obbe