Abstract: A method and arrangement for transmitting a data packet in the Ethernet from a first arrangement to at least a second arrangement. When a data packet is transmitted in the Ethernet, the data packet is assigned a priority class (201). In addition, the data packet is labeled (202) in accordance with the priority class and transmitted (203). As a result, it becomes possible also to transmit in the Ethernet data packets of a communications connection with real-time requirements, it being possible to ensure specific time requirements in the statistical sense.

Abstract: In a method for picture-in-picture insertion, successive frames of a small picture to be inserted into a main picture having successive frames are alternatingly written frame-wise into a memory region of a memory device. A decision signal is generated at a beginning of a display of the main picture, for deciding from which of the two memory regions a stored frame of the small picture is to be read out. Frames of the small picture are read out from whichever memory region enables joint-line-free insertion of the small picture into the main picture.

Abstract: A method for storing video signal data of at least a partial frame in standard memory components includes providing standard memory components with 2.sup.m possible memory addresses, addressing b pixels with x address bits and separately addressing z lines with y address bits through picture addresses, and selecting b<2.sup.x, z<2.sup.y, and m, b, z, x and y as positive integers 2.sup.m is selected to be as small as possible but greater than the product of b and z. The x address bits and y address bits are recoded utilizing bit combinations not occurring in the picture addresses for uniquely assigning each occurring picture address its own memory address. A circuit configuration for performing the method includes a memory device having memory address input terminals for addressing 2.sup.m possible memory addresses, a data input terminal, and a data output terminal. A control device assigns picture addresses to video signal data and controls memorization of the video signal data.

Abstract: A switchgear has insertable and retractable apparatus racks, which are to be connected by means of break-contact devices to supplying busbars and to outgoing conductors. The busbars are configured to lie one behind the other in a moving direction during insertion and retraction of the apparatus rack. Both break-contact configurations are simultaneously actuated by means of a mutual driving arrangement, for example, a shaft, pinions and gear racks. The result is that when the break-contact configurations are closed, the apparatus rack is mechanically blocked in a reliable manner so that it cannot become displaced.