Editing Optical disc (section)

====Laserdisc====
In the [[Netherlands]] in 1969, [[Philips]] Research [[physicist]], Pieter Kramer invented an optical [[videodisc]] in reflective mode with a protective layer read by a focused [[laser]] beam {{US Patent|5,068,846}}, filed 1972, issued 1991. Kramer's physical format is used in all optical discs. 

In 1975, Philips and MCA began to work together, and in 1978, commercially much too late, they presented their long-awaited [[Laserdisc]] in [[Atlanta]]. MCA delivered the discs and Philips the players. However, the presentation was a commercial failure, and the cooperation ended.

In Japan and the U.S., [[Pioneer Corporation|Pioneer]] succeeded with the Laserdisc until the advent of the DVD. In 1979, Philips and [[Sony]], in consortium, successfully developed the [[audio compact disc]].