Patent ID: 8570368
Filing Date: 2013-10-29
Classification: H04H,H04N,H04R

Abstract:
1. 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 the 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 and transmitting the audio signal to the outside of the receiver; 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 and transmits said available frequency information; and a video camera, remote from the receiver, to receive and record video data, the video camera having an attached view finder, and to (1) receive and record the transmitted audio signal from the receiver, (2) receive and display the available frequency information in the view finder attached to the camera, (3) determine selected frequency data, which is a particular frequency selected from among the available frequency information, and (4) transmit the selected frequency data from the video camera to the transmitter, wherein the transmitter receives from the video camera the selected frequency data among the available frequency information and the transmitter uses the selected frequency data for audio transmission, wherein the receiver receives from the video camera the selected frequency data among the available frequency information and the receiver uses the selected frequency to receive audio transmission from the transmitter, wherein the video camera transmits to the receiver and transmitter another selected frequency when reception on the selected frequency deteriorates, and wherein said detector detects frequencies of a radio wave not being used by other devices based on an available frequency search command received by the receiver, the detection includes (a) setting a frequency range to a predetermined frequency band in response to a group/channel setting command received by the receiver by referencing group/channel status data, (b) measuring a Radio Frequency (RF) level of the radio wave of the frequency range, (c) incrementing the frequency range, and (d) repeating steps (a) to (c) until determining that the frequency range is not being used when the RF level is less than a predetermined level.