| 摘要 |
PURPOSE:To prevent reproduced voice quality from being rapidly degraded, and a line from being unexpectedly disconnected when like quality is degraded at the digital mobile communication terminal for receiving digital encoded voice signals. CONSTITUTION:The line quality of received waves is detected by a line quality detecting means 10, and the state of the line is reported to an alarming means 11. When the degradation of the line is detected, the alarming means 11 adds a voice signal such as white noise to the received voice signal by using an adder 9 so that a user can audibly recognize the degrading condition of the line quality. The user can recognize the degrading condition of the line quality and when the line quality is degraded, the signals can be received in the satisfactory state of the line quality even a little by changing the direction or shifting the position of the digital mobile communication terminal. |
