| 摘要 |
A remote controller device includes a first audio processor converting externally received sound to an external audio signal, an operation unit including a plurality of buttons, detecting whether each of the plurality of buttons is depressed or not to generate an operation signal representing the detected result, and a transmitter converting the external audio signal and the operation signal to a radio signal for transmission. A television device includes a receiver receiving the radio signal from the remote controller device for conversion to the external audio signal and the operation signal, a network interface unit transmitting a telephone signal onto a network based on the external audio signal and the operation signal, and a display unit displaying a depressed form or non-depressed form of each of the plurality of buttons based on the operation signal.
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