发明名称 |
Adaptive removal of disturbance in TDMA acoustic peripheral devices |
摘要 |
Methods and apparatus are disclosed for suppressing transmitter burst mode disturbances in an audio band. The method and apparatus detects those signal frames wherein the input signal contains signal energy comprised substantially of only the disturbance signal; characterizes the disturbance signal in the detected signal frames to obtain a disturbance signal correction; and compensates the input signal, only for those signal frames where a transmission burst exists, using the obtained disturbance signal correction so as to remove the disturbance signal from those signal frames that contain voice, and also from certain signal frames that do not contain voice. Frequency hopping embodiments of disturbance removing circuitry are also disclosed.
|
申请公布号 |
US6269093(B1) |
申请公布日期 |
2001.07.31 |
申请号 |
US19970991763 |
申请日期 |
1997.12.16 |
申请人 |
NOKIA MOBILE PHONES LIMITED |
发明人 |
ALAPURANEN PERTTI;KUHN INGO;PAKSUNIEMI JANNE |
分类号 |
H04J3/00;G10L21/02;H04B1/10;H04B1/56;H04B15/00;H04J1/00;(IPC1-7):H04J1/00 |
主分类号 |
H04J3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|