Wikipedia
Syncro-Vox (sometimes spelled Synchro-Vox) is a filming method which combines static images with moving images, the most common use of which is to superimpose talking lips on a photograph of a celebrity or a cartoon drawing. It is one of the most extreme examples of the cost-cutting strategy of limited animation. The method was developed by cameraman Edwin "Ted" Gillette in the 1950s in order to simulate talking animals in television commercials. Gillette filed the technique on February 4, 1952, and obtained patent #2,739,505 on March 27, 1956.
Because animating a mouth in synchronization with sound was difficult, Syncro-Vox was soon used as a cheap animation technique, such as in the cartoons produced by Cambria Studios: Clutch Cargo, Space Angel, and Captain Fathom, in which actors' lips voicing the scripted dialogue were laid over the animated figures.