A method of decoding CAVLC transform coefficients encoded from an image uses a plurality of registers for storing coefficients and flags and a plurality of MUX devices for selecting data input for corresponding registers. The system may include one or more tags, each tag being disposed on one associated object; one or more substations, each substation arranged for communication with tags located within a range around each substation; and one or more base stations, each base station arranged for communication with substations located within a range around each base station. A salt concentration is between near zero moles per liter and the maximum salt concentration soluble in water. Targeting may be refined based at least in part on monitored responses to previous advertising.