Systems and methods that facilitate the elimination of interference of an IR signal emitted from an IR blaster by the IR signal emitted from a remote control unit. In a preferred embodiment in which an AV device coupled to a television receives IR signals repeated and transmitted by the television over an IR blaster cable, a right hand polarizer lens is positioned on the front of the remote control unit in front of the IR emitter and a left hand polarizer lens is positioned on the AV device in front of its IR detector. In operation, the IR beam emitted from the remote control unit is right hand polarized and is blocked by the left hand polarizer lens. The IR beam emitted from the IR blaster is randomly polarized and passes through the left hand polarizer lens with only a slight attenuation.