Invention Grant
- Patent Title: Narrow band tone detection in echo canceling system
- Patent Title (中): 回波消除系统中的窄带音检测
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Application No.: US11045825Application Date: 2005-01-27
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Publication No.: US07792280B2Publication Date: 2010-09-07
- Inventor: Renee Johnston , Mirjana Popovic , Dieter Schulz , Jan Radecki
- Applicant: Renee Johnston , Mirjana Popovic , Dieter Schulz , Jan Radecki
- Applicant Address: CA Ottawa, Ontario
- Assignee: Mitel Networks Corporation
- Current Assignee: Mitel Networks Corporation
- Current Assignee Address: CA Ottawa, Ontario
- Priority: GB0402096.2 20040130
- Main IPC: H04M9/08
- IPC: H04M9/08
Abstract:
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.
Public/Granted literature
- US20050169458A1 Narrow band tone detection in echo canceling system Public/Granted day:2005-08-04
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