L cut

An L cut, also known as a split edit, is an edit transition from one shot to another in film or video, where the picture and sound are synchronized but the transitions in each are not coincident. This is often done to enhance the aesthetics or flow of the film as L cuts allow the audience to see context (either before or after) of speaking rather than simply the speaking itself. Without L cuts, a conversation between two people can feel like a tennis match.