| 摘要 |
<p>A wireless terminal can be used in a place where electromagnetic waves are restricted. An image/music distribution device (2a) provides a distribution service of visual images and music by voice-graded analog signals in an aircraft (2). The wireless terminal (1) is a cellular phone, for example, and owned by a passenger aboard the aircraft (2). The wireless terminal (1) has a command accepting means (1a), a power supply control means (1b) and a signal conversion means (1c). The command accepting means (1a) accepts a command from the outside. The power supply control means (1b) turns OFF the power supply of a wireless circuit region, where the electromagnetic waves are generated, in response to the command. The signal conversion means (1c) converts the voice-graded analog signal such as the image or music distributed from the image/music distribution device (2a) into a digital signal in response to the command. Thus, the wireless terminal (1) can enjoy the video/music service without generating the electromagnetic waves and can be used in the aircraft (2).</p> |
