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公开(公告)号：US09270830B2
公开(公告)日：2016-02-23
申请号：US13960008
申请日：2013-08-06
发明人： Rafi Rabipour , Dominic Ho
CPC分类号： H04M9/082 , H04B3/23 , H04L43/0841
摘要： An echo canceller in an IP network includes an adaptive filter that models the echo path between a receiving output port of the echo canceller and a sending input port. The adaptive filter filters a receiving input signal to generate an estimate of an echo signal. The estimate of the echo signal is subtracted from a sending input signal to cancel the echo in the sending input signal and to generate a sending output signal. A packet loss detection circuit detects when packet loss occurs in the echo path. Responsive to detection of packet loss in the echo path, the echo canceller applies packet loss concealment to either the sending output signal or the receiving input signal.
摘要翻译： IP网络中的回波消除器包括对回波消除器的接收输出端口和发送输入端口之间的回波路径进行建模的自适应滤波器。 自适应滤波器对接收输入信号进行滤波以产生回波信号的估计。 从发送输入信号中减去回波信号的估计，以消除发送输入信号中的回波并产生发送输出信号。 分组丢失检测电路检测在回波路径中发生分组丢失的情况。 响应于在回波路径中检测到分组丢失，回波消除器将分组丢失隐藏应用于发送输出信号或接收输入信号。
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公开(公告)号：US20150043361A1
公开(公告)日：2015-02-12
申请号：US13960008
申请日：2013-08-06
发明人： Rafi Rabipour , Dominic Ho
CPC分类号： H04M9/082 , H04B3/23 , H04L43/0841
摘要： An echo canceller in an IP network includes an adaptive filter that models the echo path between a receiving output port of the echo canceller and a sending input port. The adaptive filter filters a receiving input signal to generate an estimate of an echo signal. The estimate of the echo signal is subtracted from a sending input signal to cancel the echo in the sending input signal and to generate a sending output signal. A packet loss detection circuit detects when packet loss occurs in the echo path. Responsive to detection of packet loss in the echo path, the echo canceller applies packet loss concealment to either the sending output signal or the receiving input signal.
摘要翻译： IP网络中的回波消除器包括对回波消除器的接收输出端口和发送输入端口之间的回波路径进行建模的自适应滤波器。 自适应滤波器对接收输入信号进行滤波以产生回波信号的估计。 从发送输入信号中减去回波信号的估计，以消除发送输入信号中的回波并产生发送输出信号。 分组丢失检测电路检测在回波路径中发生分组丢失的情况。 响应于在回波路径中检测到分组丢失，回波消除器将分组丢失隐藏应用于发送输出信号或接收输入信号。
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公开(公告)号：US09420114B2
公开(公告)日：2016-08-16
申请号：US13959991
申请日：2013-08-06
发明人： Rafi Rabipour , Dominic Ho
摘要： An echo canceller for an IP network includes an adaptive filter that models the echo path and generates an estimate of the echo signal from a receiving input signal. The echo canceller subtracts the estimate of the echo signal from a sending input signal to generate a sending output signal with reduced echo. Variation in the echo delay is detected. A delay circuit compensates for the changes in the echo delay to provide proper time-alignment between the estimate of the echo signal and the sending input signal so that the echo signal will be more effectively cancelled.
摘要翻译： 用于IP网络的回声消除器包括自适应滤波器，其对回波路径建模并从接收输入信号产生回波信号的估计。 回波消除器从发送输入信号中减去回波信号的估计，以产生具有减少回波的发送输出信号。 检测回波延迟的变化。 延迟电路补偿回波延迟的变化，以在回波信号的估计和发送输入信号之间提供适当的时间对准，使得回波信号将被更有效地消除。
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公开(公告)号：US09769320B2
公开(公告)日：2017-09-19
申请号：US15003221
申请日：2016-01-21
发明人： Rafi Rabipour , Chung-Cheung Chu , Daniel Cohn
CPC分类号： H04M7/0072 , G10L19/00 , H04L65/1059 , H04L65/608 , H04W28/18 , H04W88/181
摘要： The present disclosure provides systems and methods for dynamically signaling encoder capabilities of vocoders of corresponding communication nodes. In one embodiment, during a call between a first communication node and a second communication node, a control node (e.g., base station controller or mobile switching center) for the first communication node sends capability information for a voice encoder of a vocoder of the first communication node to a control node for the second communication node. As a result, the second communication node is enabled to select and request a preferred encoder mode for the voice encoder of the vocoder of the first communication node based on the capabilities of the voice encoder of the vocoder of the first communication node.
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公开(公告)号：US20150043571A1
公开(公告)日：2015-02-12
申请号：US13959991
申请日：2013-08-06
发明人： Rafi Rabipour , Dominic Ho
IPC分类号： H04M9/08
摘要： An echo canceller for an IP network includes an adaptive filter that models the echo path and generates an estimate of the echo signal from a receiving input signal. The echo canceller subtracts the estimate of the echo signal from a sending input signal to generate a sending output signal with reduced echo. Variation in the echo delay is detected. A delay circuit compensates for the changes in the echo delay to provide proper time-alignment between the estimate of the echo signal and the sending input signal so that the echo signal will be more effectively cancelled.
摘要翻译： 用于IP网络的回声消除器包括自适应滤波器，其对回波路径建模并从接收输入信号产生回波信号的估计。 回波消除器从发送输入信号中减去回波信号的估计，以产生具有减少回波的发送输出信号。 检测回波延迟的变化。 延迟电路补偿回波延迟的变化，以在回波信号的估计和发送输入信号之间提供适当的时间对准，使得回波信号将被更有效地消除。
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公开(公告)号：US20160142552A1
公开(公告)日：2016-05-19
申请号：US15003221
申请日：2016-01-21
发明人： Rafi Rabipour , Chung-Cheung Chu , Daniel Cohn
CPC分类号： H04M7/0072 , G10L19/00 , H04L65/1059 , H04L65/608 , H04W28/18 , H04W88/181
摘要： The present disclosure provides systems and methods for dynamically signaling encoder capabilities of vocoders of corresponding communication nodes. In one embodiment, during a call between a first communication node and a second communication node, a control node (e.g., base station controller or mobile switching center) for the first communication node sends capability information for a voice encoder of a vocoder of the first communication node to a control node for the second communication node. As a result, the second communication node is enabled to select and request a preferred encoder mode for the voice encoder of the vocoder of the first communication node based on the capabilities of the voice encoder of the vocoder of the first communication node.
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