A method of coding a moving picture is provided that reduces blocking artifacts. The tool holder has an outer thread forming radial spline projections of the splined profile that cooperates with the inner profile of the core bit. A movable cam actuator on the body includes another cam surface which coacts with the first cam permitting the tongue to flex or unlock. The rectifier includes a control part having control terminals and a power circuit controlled by the control module and optionally provided with a cooling device, in which all the power-conducting components are designed as power MOS components and integrated in a stacked construction.