The traditional definition is a device to perform video effects by digital means, either including built-in mixer or connected to external mixer to enhance its artistic features. More modern jargon usage takes DVE to mean a two or three-dimensional special effects generator, without mixing facilities
Digital Video Effects. Special computer generated effects that manipulate video. Video footage that bends, rolls, bounces or wraps around objects
Digital video effects. Electronic digital picture modification yielding specialty image patterns and maneuvers: tumble, strobe, page turn, mosaic, posterization, solarization, etc.