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1.发明授权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公开(公告)号：US08929263B2
公开(公告)日：2015-01-06
申请号：US13905640
申请日：2013-05-30
Applicant: Cisco Technology, Inc.
Inventor： Michael A. Ramalho , Gary Skrabutenas , Jim Frauenthal
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.
Abstract translation: 在示例实施例中，在互联网协议（IP）会议桥中的回波消除器（ECAN）的自适应抖动缓冲器（AJB）和自适应批量延迟（ABD）缓冲器之间引入控制连接。 控制连接允许AJB控制ABD在ECAN卷积处理器（CP）信号路径中插入的延迟量。 ABD延迟的调整恢复ECAN内部回波估计的时间对齐，并补偿由网络诱发的AJB延迟变化引入的回波尾延迟的变化。 回波尾路径中保留时间不变性。
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2.发明申请ECHO MITIGATION IN THE PRESENCE OF VARIABLE DELAYS DUE TO ADAPTIVE JITTER BUFFERS 审中-公开由于适应性抖动缓冲区，ECHO减缓存在可变延迟公开(公告)号：US20130258909A1
公开(公告)日：2013-10-03
申请号：US13905640
申请日：2013-05-30
Applicant: Cisco Technology, Inc.
Inventor： Michael A. RAMALHO , Gary Scrabutenas , Jim Frauenthal
IPC: H04M3/00
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.
Abstract translation: 在示例实施例中，在互联网协议（IP）会议桥中的回波消除器（ECAN）的自适应抖动缓冲器（AJB）和自适应批量延迟（ABD）缓冲器之间引入控制连接。 控制连接允许AJB控制ABD在ECAN卷积处理器（CP）信号路径中插入的延迟量。 ABD延迟的调整恢复ECAN内部回波估计的时间对齐，并补偿由网络诱发的AJB延迟变化引入的回波尾延迟的变化。 回波尾路径中保留时间不变性。
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