Abstract: A road toll system comprising a vehicle-mounted unit having a satellite navigation receiver (52) implementing a position tracking function. The system further comprises means for determining the routes taken by the vehicle based on the position tracking information and a sensor (54,56,57,58,60,61,62) for detecting a local vehicle condition which is independent of the satellite navigation signals, and which local vehicle condition is dependent on the absolute position of the vehicle or a change in the position of the vehicle. The authenticity of the position tracking information is validated using the sensor information. This system uses a satellite navigation receiver to enable infrastructure-free road tolling to be implemented. The system further provides a way of preventing a so-called fake GPS attack, i.e. providing false GPS data to reduce the road tolls payable. This is achieved by providing validation of the GPS position information by comparing with independent information collected by the vehicle.

Abstract: An MHP television device including a user input and a GUI application for use in such a device wherein the GUI application maintains at least one notional wheel to which activities and strings for representing the activities may be assigned and generates an image for display, the image including an edge of the notional wheel on which a predetermined number of the strings are arranged for display, the GUI application being responsive to the user input both to rotate the notional wheel so as to display different strings and to select any activity represented by a string on the notional wheel at a predetermined position of the image.

Abstract: An MHP television device including a user input and a GUI application for use in such a device wherein the GUI application maintains at least one notional wheel to which activities and strings for representing the activities may be assigned and generates an image for display, the image including an edge of the notional wheel on which a predetermined number of the strings are arranged for display, the GUI application being responsive to the user input both to rotate the notional wheel so as to display different strings and to select any activity represented by a string on the notional wheel at a predetermined position of the image.

Abstract: A storage medium unit for recording of storing data, wherein the data are divided in a predetermined number of data groups, wherein the first portion of the data groups are memorized on every N (N=1, 2, 3, . . . ) track of a recording medium and the remaining portions of the data groups are memorized on remaining tracks of the recording medium.

Abstract: A system for serving information includes a router; archive storage medium units connected to the router for storing information data; delivere storage medium units connected to the router for partially storing information data from the archive storage medium units; end devices each having an input and a display connected to the router for outputting demand data requesting selected information data; and a controller connected to the router for managing distribution of the information data.