A reference position detecting apparatus includes an electric motor and a motor control unit. One technique includes generating a control signal from a video data enable signal and an auxiliary data enable signal, and combining an auxiliary data signal and a video data signal into a composite data signal using the control signal. An interlock is operable to disable the steering control device as it rotates between the first and second operating positions. The invention also relates to methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. A predetermined Gabor filter is selected from the detected face image by an Adaboost technique, and a support vector for only a feature quantity extracted by the selected filter is learned, thus performing expression recognition.