| 摘要 |
<p>A wireless audio transmission system is described. The system includes: a transmitter having a microphone and a modulator-transmitter transmitting a radio wave modulated by an audio signal from the microphone. Further the system has a receiver having data included a receiver-demodulator demodulating the audio signal after receiving the radio wave transmitted from the transmitter, outputting the audio signal demodulated by the receiver-demodulator to the outside of the receiver. A video camera is also described into which the audio signal output from the receiver is input, wherein the receiver has a detector detecting frequencies of a radio wave not being used by other devices based on a reception level of the radio wave received by the receiver-demodulator and outputs available frequency information indicating the frequencies detected by the detector to the video camera, and the video camera has a controller causing the available frequency information input from the receiver to be displayed on a display unit attached to the video camera.</p> |
