Invention Grant
US08620232B2 Post filter for spectral domain echo cancellers to handle non-linear echo components
有权
用于频域回波消除器的后置滤波器来处理非线性回波分量
- Patent Title: Post filter for spectral domain echo cancellers to handle non-linear echo components
- Patent Title (中): 用于频域回波消除器的后置滤波器来处理非线性回波分量
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Application No.: US13653957Application Date: 2012-10-17
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Publication No.: US08620232B2Publication Date: 2013-12-31
- Inventor: Michiel Andre Helsloot
- Applicant: Dialog Demiconductor B.V.
- Applicant Address: NL 's-Hertogenbosch
- Assignee: Dialog Semiconductor B.V.
- Current Assignee: Dialog Semiconductor B.V.
- Current Assignee Address: NL 's-Hertogenbosch
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman
- Priority: EP12156590 20120222
- Main IPC: H04B1/04
- IPC: H04B1/04
Abstract:
The present document discloses a method and system for improving echo cancellation in the presence of non-linear distortions. A circuit attenuates a transmit signal in one or more spectral bands based on a receive signal. The distorted echo comprised within the transmit signal results from distortions incurred by the receive signal when being rendered by an electronic device. The circuit compares energy values of the receive signal in multiple spectral bands with multiple corresponding spectral band dependent distortion thresholds and determines that for a first spectral band from multiple spectral bands. A first energy value from multiple energy values exceeding a first distortion threshold from multiple distortion thresholds attenuates the transmit signal in one or more spectral bands at higher frequencies than the first spectral band with corresponding spectral band dependent attenuation factors.
Public/Granted literature
- US20130217349A1 Post Filter for Spectral Domain Echo Cancellers to Handle Non-Linear Echo Components Public/Granted day:2013-08-22
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