发明名称 |
Narrow band tone detection in echo canceling system |
摘要 |
The present invention relates generally to tone detection in echo canceling systems, and more particularly to a method of monitoring oscillations of adaptive filter coefficients for narrow band tone detection in echo cancellation systems. The invention is directed at improving communication in a telephone communication network having one or more hybrid connections. A method for detecting continuous tones in an echo canceling system having an adaptive filter is provided. Continuous tones have a deleterious effect on the performance of adaptive filters. In the present invention, the adaptive filter coefficients are monitored. Oscillation of those coefficients indicates continuous tone presence.
|
申请公布号 |
US2005169458(A1) |
申请公布日期 |
2005.08.04 |
申请号 |
US20050045825 |
申请日期 |
2005.01.27 |
申请人 |
MITEL NETWORKS CORPORATION |
发明人 |
JOHNSTON RENEE;POPOVIC MIRJANA;SCHULZ DIETER;RADECKI JAN |
分类号 |
H04B3/23;H04Q1/457;(IPC1-7):H04M9/08 |
主分类号 |
H04B3/23 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|