Abstract: A video frame rate converter has a temporal synchronization analyzer for dividing the input video sequence into successive groups of frames each of Nin consecutive frames and a motion analyzer for analyzing motion over the frames of each group to provide a group motion measure. The inverter includes both an interpolator for performing interpolation on a group of Nin input frames to provide Nout output frames, where Nin is different from Nout; and a synchronizer for deleting or repeating an identified frame from the group of Nin input frames to provide Nout output frames. A switcher then switches group-by-group in dependence upon the group motion measure between the interpolator and the synchronizer to form an output video sequence having an output frame rate different from the input frame rate.