Invention Grant
US09025762B2 System and method for clock synchronization of acoustic echo canceller (AEC) with different sampling clocks for speakers and microphones
有权
用于扬声器和麦克风的不同采样时钟的声学回声消除器（AEC）的时钟同步的系统和方法
- Patent Title: System and method for clock synchronization of acoustic echo canceller (AEC) with different sampling clocks for speakers and microphones
- Patent Title (中): 用于扬声器和麦克风的不同采样时钟的声学回声消除器（AEC）的时钟同步的系统和方法
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Application No.: US13657908Application Date: 2012-10-23
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Publication No.: US09025762B2Publication Date: 2015-05-05
- Inventor: Feng Bao , J. William Mauchly , Subrahmanyam Kunapuli , Xiangyu Bao
- Applicant: Cisco Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Merchant & Gould
- Main IPC: H04M9/08
- IPC: H04M9/08 ; H04R1/28
Abstract:
Clock synchronization for an acoustic echo canceller (AEC) with a speaker and a microphone connected over a digital link may be provided. A clock difference may be estimated by analyzing the speaker signal and the microphone signal in the digital domain. The clock synchronization may be combined in both hardware and software. This synchronization may be performed in two stages, first with coarse synchronization in hardware, then fine synchronization in software with, for example, a re-sampler.
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