Invention Grant
US08929263B2 Echo mitigation in the presence of variable delays due to adaptive jitter buffers
有权
由于自适应抖动缓冲区,存在可变延迟的回波减轻
- Patent Title: Echo mitigation in the presence of variable delays due to adaptive jitter buffers
- Patent Title (中): 由于自适应抖动缓冲区,存在可变延迟的回波减轻
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Application No.: US13905640Application Date: 2013-05-30
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Publication No.: US08929263B2Publication Date: 2015-01-06
- Inventor: Michael A. Ramalho , Gary Skrabutenas , Jim Frauenthal
- 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: Tucker Ellis LLP
- Main IPC: H04B3/20
- IPC: H04B3/20 ; H04M3/00 ; H04M9/08 ; H04B3/23

Abstract:
In an example embodiment, a control connection is introduced between an adaptive jitter buffer (AJB) and an adaptive bulk delay (ABD) buffer of an echo canceller (ECAN) in an Internet Protocol (IP) conference bridge. The control connection allows the AJB to control the amount of delay inserted by the ABD in the ECAN convolution processor (CP) signal path. The adjustment in ABD delay restores the time alignment of the ECAN internal echo estimate and offsets variations in echo tail delay introduced by network induced AJB delay changes. Time-invariance is preserved in the echo tail path.
Public/Granted literature
- US20130258909A1 ECHO MITIGATION IN THE PRESENCE OF VARIABLE DELAYS DUE TO ADAPTIVE JITTER BUFFERS Public/Granted day:2013-10-03
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