1. A system comprising: a remote control having a relative motion sensor, wherein the relative motion sensor outputs data indicative of a change in position of the remote control; at least one predetermined light source; a photodetector that detects light from the at least one predetermined light source and outputs data indicative of the detected light; and at least one controller configured to determine an absolute position of the remote control based on the data output by the relative motion sensor and the photodetector, wherein the absolute position is determined with respect to a reference location.