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1.发明授权公开(公告)号：US07516033B2
公开(公告)日：2009-04-07
申请号：US11426226
申请日：2006-06-23
IPC分类号： G06F19/00
CPC分类号： H04B3/23
摘要： A method and apparatus for identifying echo sources in a communication path. A system that incorporates teachings of the present disclosure may include, for example, an echo measurement device (EMD) having a transmit module to transmit an echo canceller deactivation signal in a communication path of the communication system, wherein the echo canceller deactivation signal deactivates one or more echo cancellers in said communication path. The transmit module can also transmit a test signal in the communication path which is looped back at an end point identified as having an echo problem, wherein the test signal is transmitted at a remote location from the end point. The EMD can further include a detection module to detect one or more echo signals associated with the test signal. Additional embodiments are disclosed.
摘要翻译： 一种用于识别通信路径中的回波源的方法和装置。 结合本公开的教导的系统可以包括例如具有发射模块以在通信系统的通信路径中发送回波消除器去激活信号的回波测量装置（EMD），其中回波消除器去激活信号使一个 或更多的回声消除器。 发射模块还可以在通信路径中发送测试信号，该测试信号在被识别为具有回波问题的终点被环回，其中测试信号在距离终点的远程位置发送。 EMD还可以包括检测模块以检测与测试信号相关联的一个或多个回波信号。 公开了另外的实施例。
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公开(公告)号：US20110149815A1
公开(公告)日：2011-06-23
申请号：US12641185
申请日：2009-12-17
申请人： James James , David B. Ramsden , Wallace F. Smith
发明人： James James , David B. Ramsden , Wallace F. Smith
CPC分类号： H04M9/082
摘要： A method and apparatus for providing echo cancellation are disclosed. For example, the method receives via an echo canceller a first audio signal directed towards an endpoint device, and adds an inserted signal to the first audio signal directed towards the endpoint device. The method determines if a second audio signal being received from the endpoint device comprises the inserted signal, and cancels at least a portion of the second audio signal that is associated with the first audio signal, if the inserted signal is detected.
摘要翻译： 公开了一种用于提供回波抵消的方法和装置。 例如，该方法经由回波消除器接收指向端点设备的第一音频信号，并将插入的信号添加到指向端点设备的第一音频信号。 如果检测到插入的信号，该方法确定从端点装置接收的第二音频信号是否包括插入的信号，并且取消与第一音频信号相关联的第二音频信号的至少一部分。
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公开(公告)号：US08391126B2
公开(公告)日：2013-03-05
申请号：US12641185
申请日：2009-12-17
申请人： James James , David B. Ramsden , Wallace F. Smith
发明人： James James , David B. Ramsden , Wallace F. Smith
IPC分类号： H04J1/12
CPC分类号： H04M9/082
摘要： A method and apparatus for providing echo cancellation are disclosed. For example, the method receives via an echo canceller a first audio signal directed towards an endpoint device, and adds an inserted signal to the first audio signal directed towards the endpoint device. The method determines if a second audio signal being received from the endpoint device comprises the inserted signal, and cancels at least a portion of the second audio signal that is associated with the first audio signal, if the inserted signal is detected.
摘要翻译： 公开了一种用于提供回波抵消的方法和装置。 例如，该方法经由回波消除器接收指向端点设备的第一音频信号，并将插入的信号添加到指向端点设备的第一音频信号。 如果检测到插入的信号，该方法确定从端点装置接收的第二音频信号是否包括插入的信号，并且取消与第一音频信号相关联的第二音频信号的至少一部分。
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4.发明授权Method and system for measurement of the delay through a network link bounded by an echo canceller 失效用于通过由回波消除器限定的网络链路来测量延迟的方法和系统公开(公告)号：US07003098B2
公开(公告)日：2006-02-21
申请号：US10739458
申请日：2003-12-17
申请人： Wallace F. Smith
发明人： Wallace F. Smith
IPC分类号： H04B3/23
摘要： A method and system for measuring the signal transmission time through a network link bounded by at least one echo canceller. The method generally includes the steps of determining a signal transmission time (tA) along a network path including the network link bounded by the echo canceller between a first endpoint and a second endpoint, transmitting a test signal from the first endpoint to the second endpoint through the network path, transmitting an echo signal which simulates the test signal from the second endpoint to the first endpoint through the network path, measuring a minimum time delay between transmission of the test signal and transmission of the echo signal which causes the echo canceller to cancel the echo signal and calculating the signal transmission time through the network link bounded by the echo canceller based on the measured minimum time delay and the determined network path signal transmission time (tA). Where the network link is bounded by two echo cancellers, the method further includes the steps of transmitting a second test signal from the second endpoint to the first endpoint through the network path, transmitting a second echo signal which simulates the second test signal from the first endpoint to the second endpoint through the network path, measuring a second minimum time delay between transmission of the second test signal and transmission of the second echo signal which causes the second echo canceller to cancel the second echo signal and calculating the delay through the network link bounded between the first and second echo cancellers based on both measured minimum time delays and the determined network path signal transmission time (tA).
摘要翻译： 一种用于通过由至少一个回波消除器限定的网络链路来测量信号传输时间的方法和系统。 该方法通常包括以下步骤：沿着包括由第一端点和第二端点之间的回波消除器限定的网络链路的网络路径确定信号传输时间（tA），将测试信号从第一端点传送到第二端点，通过 网络路径，通过网络路径发送模拟测试信号从第二端点到第一端点的回波信号，测量测试信号的发送与回波信号的发送之间的最小时间延迟，使得回波消除器取消 回波信号，并根据所测量的最小时间延迟和所确定的网络路径信号传输时间（tA）计算通过由回波消除器限定的网络链路的信号传输时间。 在网络链路被两个回波消除器限制的情况下，该方法还包括以下步骤：通过网络路径将第二测试信号从第二端点传输到第一端点;发送第二回波信号，模拟第二测试信号 通过所述网络路径到所述第二端点的端点，测量所述第二测试信号的传输和所述第二回波信号的传输之间的第二最小时间延迟，所述第二回波信号使得所述第二回波消除器取消所述第二回波信号并且计算通过所述网络链路 基于所测量的最小时间延迟和确定的网络路径信号传输时间（tA），在第一和第二回波消除器之间限定。
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公开(公告)号：US07899639B2
公开(公告)日：2011-03-01
申请号：US12395176
申请日：2009-02-27
CPC分类号： H04B3/23
摘要： A system that incorporates teachings of the present disclosure may include, for example, an echo measurement device having a controller to transmit a test signal in a communication path which is looped back at an end point identified as having an echo problem. The test signal can be transmitted at a remote location from the end point. The test signal can be represented by a limited burst signal of one or more frequencies operating outside a range of an operating frequency of an echo canceller deactivation signal transmitted in the communication path. Additional embodiments are disclosed.
摘要翻译： 包括本公开的教导的系统可以包括例如具有控制器的回波测量装置，该控制器在通信路径中发送测试信号，所述通信路径在被识别为具有回波问题的终点处被环回。 测试信号可以在距终点的远程位置传输。 测试信号可以由在通信路径中发送的回波消除器去激活信号的操作频率范围之外的一个或多个频率的有限突发信号来表示。 公开了另外的实施例。
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公开(公告)号：US08503311B2
公开(公告)日：2013-08-06
申请号：US12329172
申请日：2008-12-05
申请人： David Ramsden , Wallace F. Smith
发明人： David Ramsden , Wallace F. Smith
CPC分类号： H04M3/2227 , H04L12/66 , H04L43/0858 , H04L65/1006
摘要： A system and method for recording analog signals exchanged between a telephone device and a VoIP device, capturing packets exchanged between the VoIP device and an IP network, determining analog time values corresponding to analog characteristics of the analog signals, determining digital time values corresponding to digital characteristics of the packets, determining a common reference time for the analog time values and digital time values and determining a processing delay based on the analog time values and the digital time values.
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公开(公告)号：US20100142513A1
公开(公告)日：2010-06-10
申请号：US12329172
申请日：2008-12-05
申请人： David Ramsden , Wallace F. Smith
发明人： David Ramsden , Wallace F. Smith
IPC分类号： H04L12/66
CPC分类号： H04M3/2227 , H04L12/66 , H04L43/0858 , H04L65/1006
摘要： A system and method for recording analog signals exchanged between a telephone device and a VoIP device, capturing packets exchanged between the VoIP device and an IP network, determining analog time values corresponding to analog characteristics of the analog signals, determining digital time values corresponding to digital characteristics of the packets, determining a common reference time for the analog time values and digital time values and determining a processing delay based on the analog time values and the digital time values.
摘要翻译： 一种用于记录在电话设备和VoIP设备之间交换的模拟信号的系统和方法，捕获在VoIP设备和IP网络之间交换的分组，确定与模拟信号的模拟特性对应的模拟时间值，确定对应于数字的数字时间值 分组的特性，确定模拟时间值和数字时间值的公共参考时间，并根据模拟时间值和数字时间值确定处理延迟。
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