| 摘要 |
A low cost pointing device is desirable which is operable in low power consumption and is properly operable with respect to GUI of an AV appliance. In an AV appliance operating system containing a remote controller main body which is operable in an infrared communication with respect to an AV appliance equipped with a display unit 31 , one pair of speakers 33, 35 , and a control apparatus 39 , there are provided: a pulse generating unit provided in the remote controller main body, for outputting an infrared pulse at predetermined timing; a ultrasonic wave outputting unit 63 provided in the control apparatus 39 , for sequentially outputting ultrasonic waves having frequencies outside a human audio-frequency range from the one pair of speakers 33, 35 , in response to an input of the infrared pulse; a response outputting unit 55 provided in the remote controller main body 41 , for outputting an infrared response signal in response to a detection of the ultrasonic waves; and a calculating unit 65 provided in the control apparatus 39 , for calculating a position of the remote controller main body based upon ultrasonic wave detection times at the respective speakers 33 and 35.
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