Quantel Paintbox

The , or simply Paintbox was a graphics workstation which revolutionised the way television graphics were produced in the 1980s. Typically of greatest utility to sports and news programming, Paintbox was occasionally repurposed by the British Broadcasting Corporation and used for dramatic and entertainment programming as well. Doctor Who was one of the system's earliest and most enthusiastic adopters in the BBC's Drama Series department.

Though mainly used to superimpose things like lower thirds and other textual elements, it could be used to superimpose anything on any part of the picture. Paintbox also allowed for an early form of colour grading. Though many of the serials in the Sixth and Seventh Doctors' eras used Paintbox to varying degrees, one of the stories to make obvious use of the technology was Mindwarp. Its "making of" documentary demonstrated the effects that Paintbox could accomplish in the mid-1980s.

It is sometimes stated that the Paintbox was first used on Doctor Who for The Leisure Hive, but this is not the case, as that serial was produced in 1980 and the Paintbox was not launched until 1981, and in any event it was unable to manipulate moving video. The digital video effects for The Leisure Hive were actually created by the Quantel DPE 5000, one of the earliest real-time digital video effects processors, also sometimes unofficially known as the "Quantel Image Processor" or simply "the Quantel".