Invention Grant
US07643630B2 Echo suppression with increment/decrement, quick, and time-delay counter updating
有权
回波抑制与增量/减量，快速和延时计数器更新
- Patent Title: Echo suppression with increment/decrement, quick, and time-delay counter updating
- Patent Title (中): 回波抑制与增量/减量，快速和延时计数器更新
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Application No.: US11165897Application Date: 2005-06-24
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Publication No.: US07643630B2Publication Date: 2010-01-05
- Inventor: Alan V. McCree , Takahiro Unno , Thierry LeGall , Sebastien Guiriec
- Applicant: Alan V. McCree , Takahiro Unno , Thierry LeGall , Sebastien Guiriec
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Lawrence J. Bassuk; W. James Brady; Frederick J. Telecky, Jr.
- Main IPC: H04M9/08
- IPC: H04M9/08
Abstract:
Hands-free phones with voice activity detection using a comparison of frame power estimate with an adaptive frame noise power estimate, automatic gain control with fast adaptation and minimal speech distortion, echo cancellation updated in the frequency domain with stepsize optimization and smoothed spectral whitening, and echo suppression with adaptive talking-state transitions.
Public/Granted literature
- US20060018458A1 Acoustic echo devices and methods Public/Granted day:2006-01-26
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