| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless system capable of preventing a sound signal from sound quality degradation or a malfunction by automatically adjusting a control monitor signal at an optimum level. <P>SOLUTION: In a wireless system, a first communication device 10 comprises amplifiers 13 to 15 which can set a plurality of amplification factors in a signal level of the control monitor signal for a sound signal, and an adder 19 which superposes the control monitor signal with the predetermined amplification factor on the sound signal and transmits it to a second communication device 50. The second communication device 50 comprises comparators 55 to 57 which detect whether the control monitor signal transmitted from the first communication device 10 has been successfully received or not, and an adder 64 which superposes the control monitor signal on the sound signal when the control monitor signal has been successfully received and feeds it back to the first communication device 10. Further, the first communication device 10 comprises a counter 25 which sets the optimum amplification factor in the signal level of the control monitor signal at the amplifiers 13 to 15 based on the control monitor signal fed back from the second communication device 50. <P>COPYRIGHT: (C)2012,JPO&INPIT |
