Invention Grant
- Patent Title: Two microphone noise reduction system
- Patent Title (中): 两个麦克风降噪系统
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Application No.: US12110182Application Date: 2008-04-25
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Publication No.: US08131541B2Publication Date: 2012-03-06
- Inventor: Kuan-Chieh Yen , Rogerio Guedes Alves
- Applicant: Kuan-Chieh Yen , Rogerio Guedes Alves
- Applicant Address: GB
- Assignee: Cambridge Silicon Radio Limited
- Current Assignee: Cambridge Silicon Radio Limited
- Current Assignee Address: GB
- Agent Gary R. Jarosik
- Main IPC: G10L19/00
- IPC: G10L19/00

Abstract:
A two microphone noise reduction system is described. In an embodiment, input signals from each of the microphones are divided into subbands and each subband is then filtered independently to separate noise and desired signals and to suppress non-stationary and stationary noise. Filtering methods used include adaptive decorrelation filtering. A post-processing module using adaptive noise cancellation like filtering algorithms may be used to further suppress stationary and non-stationary noise in the output signals from the adaptive decorrelation filtering and a single microphone noise reduction algorithm may be used to further provide optimal stationary noise reduction performance of the system.
Public/Granted literature
- US20090271187A1 TWO MICROPHONE NOISE REDUCTION SYSTEM Public/Granted day:2009-10-29
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