Abstract: Device for combining p video signals which represent images having a different perception depth, comprisingp sources which each generate a video signal in the form of a series of pixels, each accompanied by a priority signal which determines the depth of the signal and a key signal which determines a local change in depth,selection means for selecting in each case the m pixels having the m highest priorities,a mixing stage in which the selected m pixels are mixed.All the p sources are coupled to the mixing stage via a bus system provided with a pixel data bus, a key-signal bus and a priority-signal bus.Each source is provided with a priority-bus detector with which the signals are received on the priority bus and are compared with its own priority, and is provided with switching means controlled by the priority-bus detector in such a way that only the sources having the m highest priorities and the bus are connected to the mixing stage.