| 摘要 |
<P>PROBLEM TO BE SOLVED: To make it possible to perform a bidirectional audio call among a plurality of radio apparatuses. <P>SOLUTION: Individual frequency channels are allocated to a plurality of radio apparatuses. A repeater can communicate with the plurality of radio apparatuses using each of the frequency channels. Each of the plurality of radio apparatuses converts analog audio data to digital audio data, and transmits the digital audio data by using the frequency channel allocated to the radio apparatus. Each of the plurality of radio apparatuses receives synthesized digital audio data transmitted by using the frequency channel allocated to the radio apparatus, and outputs synthesized analog audio data to which the synthesized digital audio data is converted. The repeater receives a plurality of pieces of digital audio data transmitted by each of the radio apparatuses by using the frequency channel allocated to the radio apparatus, and transmits synthesized digital audio data generated by synthesizing the plurality of pieces of digital audio data by using each of the frequency channels allocated to each of the plurality of radio apparatuses. <P>COPYRIGHT: (C)2012,JPO&INPIT |
