Wireless audio transmission system, receiver, video camera and audio mixer

Abstract

A wireless audio transmission system includes: a transmitter having a microphone and a modulator-transmitter transmitting a radio wave modulated by an audio signal from the microphone; a receiver having a receiver-demodulator demodulating the audio signal after receiving the radio wave transmitted from the transmitter, output ting the audio signal demodulated by the receiver-demodulator to the outside of the receiver; and a video camera 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.

1 - 5 . (canceled) 
     
     
         6 . A receiver comprising:
 receiving-demodulating means for demodulating an audio signal from a received radio wave;   detection means for detecting frequencies of a radio wave not being used by other devices based on a reception level of the radio wave received by said receiving-demodulating means; and   a communication connector through which communication is performed with an electronic device having a insertion slot for the receiver when being attached to the electronic device,   wherein the audio signal demodulated by said receiving-demodulating means and available frequency information indicating the frequencies detected by said detection means are output from said communication connector.   
     
     
         7 . A receiver according to  claim 6 , further comprising:
 a controller causing said detection means to detect frequencies of a radio wave not being used by other devices and causing said available frequency Information to be output from said communication connector based on a command that is input from the outside of the receiver and that requests said available frequency information.   
     
     
         8 . A receiver according to  claim 6 , farther comprising:
 a controller setting a frequency of a radio wave to be received by said receiving-demodulating means in accordance with frequency selection information based on the input of the frequency selection information to select the frequency among the frequencies indicated by said available frequency information from said communication connector,   
     
     
         9 . A receiver according to  claim 6 , further comprising:
 a generator generating reception status information indicating a reception status of the radio wave with respect to the frequency being received by said receiving-demodulating means, wherein said reception status information is output from said communication connector.   
     
     
         10 . A receiver comprising:
 receiving-demodulating means for demodulating an audio signal from a received radio wave;   detection means for detecting frequencies of a radio wave not being used by other devices based on a reception level of the radio wave received by said receiving-demodulating means;   an audio output terminal; and   a data communication terminal,   wherein the audio signal demodulated by said receiving-demodulating means Is output from said audio output terminal through an audio cable, and   available frequency Information indicating the frequencies detected by said detection means is output from said data communication terminal through a data communication cable.   
     
     
         11 - 14 . (canceled) 
     
     
         15 . A wireless audio transmission system comprising:
 a transmitter having a microphone and a modulator-transmitter transmitting a radio wave modulated by an audio signal from said microphone;   a receiver having a receiver-demodulator demodulating the audio signal after receiving the radio wave transmitted from said transmitter, outputting the audio signal demodulated by said receiver-demodulator to the outside of the receiver; and   an audio mixer into which the audio signal output from said receiver is input,   wherein said receiver includes 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 said receiver-demodulator and outputs available frequency information indicating the frequencies detected by said detector to said audio mixer, and   said audio mixer includes a controller causing said available frequency information input from said receiver to be displayed on a display unit attached to the audio mixer.   
     
     
         16 . An audio mixer that performs mixing of an audio signal, comprising:
 a controller causing available frequency information to be displayed on a display unit attached to the audio mixer based on the input of the available frequency information indicating frequencies of a radio wave not being used by other devices from the outside of the audio mixer.   
     
     
         17 . An audio mixer according to  claim 16 ,
 wherein said controller causes status information to be displayed on the display unit based on the input of the status information indicating a reception status of the radio wave from the outside of the audio mixer.   
     
     
         18 . A receiver comprising:
 a receiver-demodulator demodulating an audio signal from a received radio wave;   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 said receiver-demodulator; and   a communication, connector through which communication is performed with an electronic device having a insertion slot for the receiver when being attached to the electronic device,   wherein the audio signal demodulated by said receiver-demodulator and available frequency information indicating the frequencies detected by said detector are output from said communication connector.   
     
     
         19 . A receiver comprising:
 a receiver-demodulator demodulating an audio signal from a received radio wave;   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 said receiver-demodulator;   an audio output terminal; and   a data communication terminal,   wherein the audio signal demodulated by said receiver-demodulator is output from said audio output terminal through an audio cable, and   available frequency information indicating the frequencies detected by said detector is output from said data communication terminal through a data communication cable.