Invention Grant
- Patent Title: Device and method for controlling damping of residual echo
- Patent Title (中): 用于控制残余回波阻尼的装置和方法
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Application No.: US13384554Application Date: 2010-06-17
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Publication No.: US08693678B2Publication Date: 2014-04-08
- Inventor: Fredric Lindström , Christian Schüldt , Ingvar Claesson
- Applicant: Fredric Lindström , Christian Schüldt , Ingvar Claesson
- Applicant Address: SE
- Assignee: Limes Audio AB
- Current Assignee: Limes Audio AB
- Current Assignee Address: SE
- Agency: Schwegman Lundberg & Woessner, P.A.
- Priority: SE0901012 20090720
- International Application: PCT/SE2010/050676 WO 20100617
- International Announcement: WO2011/010960 WO 20110127
- Main IPC: H04M9/08
- IPC: H04M9/08

Abstract:
The present invention relates to a device, such as a communication device, comprising an adaptive foreground filter configured to calculate a first echo estimation signal based on a first input signal, and an adaptive background filter being more rapidly adapting than the foreground filter and configured to calculate a second echo estimation signal based on said first input signal. Embodiments of the device further comprise damping control means for controlling damping of an echo-cancelled output signal. The device in various embodiments includes that the damping control means is configured to calculate a maximum echo estimation signal using both the first and the second echo estimation signals, and control the damping of the echo-cancelled output signal based on said maximum echo estimation signal and/or a signal derived from said maximum echo estimation signal.
Public/Granted literature
- US20120183133A1 DEVICE AND METHOD FOR CONTROLLING DAMPING OF RESIDUAL ECHO Public/Granted day:2012-07-19
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