Invention Grant
US08369251B2 Timestamp quality assessment for assuring acoustic echo canceller operability
有权
用于确保声学回声消除器可操作性的时间戳质量评估
- Patent Title: Timestamp quality assessment for assuring acoustic echo canceller operability
- Patent Title (中): 用于确保声学回声消除器可操作性的时间戳质量评估
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Application No.: US12143625Application Date: 2008-06-20
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Publication No.: US08369251B2Publication Date: 2013-02-05
- Inventor: Vinod Prakash , Chao He
- Applicant: Vinod Prakash , Chao He
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Klarquist Sparkman, LLP
- Main IPC: H04B3/20
- IPC: H04B3/20 ; H04M9/08
Abstract:
A voice communication end device provides echo reduction when operating in a full duplex mode using acoustic echo cancellation, which includes periodic audio queue adjustments to account for drift. The end device performs a quality assessment by calculating consistency statistics for the queue adjustments to determine whether acoustic echo cancellation would be ineffective, and if so falls back to a half duplex mode using voice switching.
Public/Granted literature
- US20090316881A1 TIMESTAMP QUALITY ASSESSMENT FOR ASSURING ACOUSTIC ECHO CANCELLER OPERABILITY Public/Granted day:2009-12-24
Information query
