The DVD (digital versatile disc) optical disc storage format was invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. They provided high storage capacity and digital video playback on a disc of the same dimeonsionas as a Compact Disc (CD).
DVD was seen as an inexpensive format to replace the VHS tape used by video rental libraries. The players were also compatible with the older CD audio only format.
Multiple DVD players could not be frame accurately syncronised until a number of control systems were developed for the Pioneer DVD-V7200 industrial DVD players using its RS232 port. This used the same control protocols as the Pioneer Laserdisc format.