Disclosed herein is an attenuation device, comprising a flexible housing and a high vapor pressure media having a vapor pressure approximately equal to the intravesical pressure of the bladder and a permeability of less than 1 mlday at body temperature through the outer wall of the flexible housing. The plurality of processors can be respectively coupled in parallel to the data bus, and a data communication via the data bus with one of the processors, preferably a programming of the processor, is authorized for the same, but is blocked for all of the other processors. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation. Metadata of the content may be provided to collaborating computers outside the computer network where the content was created. Further it is possible to easily and simply perform initiation of the power line communication.