Invention Grant
- Patent Title: Echo suppression
- Patent Title (中): 回声抑制
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Application No.: US13889229Application Date: 2013-05-07
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Publication No.: US09036814B2Publication Date: 2015-05-19
- Inventor: Karsten Vandborg Sorensen
- Applicant: Microsoft Corporation
- Applicant Address: US WA Redmond
- Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
- Current Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
- Current Assignee Address: US WA Redmond
- Agent Sonia Cooper; Jim Ross; Micky Minhas
- Priority: GB1223246.8 20121221
- Main IPC: H04M9/08
- IPC: H04M9/08

Abstract:
Method, user device and computer program product for suppressing echo. An audio signal is output from a speaker. A microphone receives an audio signal, wherein the received audio signal includes an echo resulting from the outputted audio signal. A Finite Impulse Response filter estimate ĥ(n) is dynamically adapted in the time domain based on the outputted audio signal and the received audio signal to model an echo path h(n) related to the echo in the received audio signal. The filter estimate ĥ(n) is used in an estimate of the echo power in the received audio signal, and the estimated echo power is used to apply echo suppression to the received audio signal, thereby suppressing the echo in the received audio signal.
Public/Granted literature
- US20140177822A1 ECHO SUPPRESSION Public/Granted day:2014-06-26
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