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    Performance testing of echo cancellers using a white noise test signal
    2.
    发明授权
    Performance testing of echo cancellers using a white noise test signal 有权
    使用白噪声测试信号进行回声消除器的性能测试

    公开(公告)号：US08208622B2

    公开(公告)日：2012-06-26

    申请号：US12582746

    申请日：2009-10-21

    申请人： Bing Chen ,  James H. James

    发明人： Bing Chen ,  James H. James

    IPC分类号： H04M9/08

    CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

    摘要： Testing equipment for and a method of performance testing an echo canceller are disclosed. The method includes generating a white noise test signal that includes a plurality of high-level white noise time segments, each of which is separated by a low-level white noise time gap. The generated white noise test signal is transmitted to the echo canceller. At least one echo output signal is received from the echo canceller, and the echo output signal results from the white noise test signal. The level and duration of the received at least one echo output signal are measured.

    摘要翻译： 公开了用于测试回波消除器的测试设备和性能测试方法。 该方法包括产生白噪声测试信号，该信号包括多个高电平白噪声时间段，每个白噪声时间段由低电平白噪声时间间隔分开。 产生的白噪声测试信号被传送到回波消除器。 从回波消除器接收至少一个回波输出信号，并且回波输出信号来自白噪声测试信号。 测量所接收的至少一个回波输出信号的电平和持续时间。

    Performance Testing of Echo Cancellers Using a White Noise Test Signal
    3.
    发明申请
    Performance Testing of Echo Cancellers Using a White Noise Test Signal 有权
    使用白噪声测试信号的回波消除器的性能测试

    公开(公告)号：US20100040204A1

    公开(公告)日：2010-02-18

    申请号：US12582746

    申请日：2009-10-21

    申请人： Bing Chen ,  James H. James

    发明人： Bing Chen ,  James H. James

    IPC分类号： H04M1/24

    CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

    摘要： Testing equipment for and a method of performance testing an echo canceller are disclosed. The method includes generating a white noise test signal that includes a plurality of high-level white noise time segments, each of which is separated by a low-level white noise time gap. The generated white noise test signal is transmitted to the echo canceller. At least one echo output signal is received from the echo canceller, and the echo output signal results from the white noise test signal. The level and duration of the received at least one echo output signal are measured.

    摘要翻译： 公开了用于测试回波消除器的测试设备和性能测试方法。 该方法包括产生白噪声测试信号，该信号包括多个高电平白噪声时间段，每个白噪声时间段由低电平白噪声时间间隔分开。 产生的白噪声测试信号被传送到回波消除器。 从回波消除器接收至少一个回波输出信号，并且回波输出信号来自白噪声测试信号。 测量所接收的至少一个回波输出信号的电平和持续时间。

    Performance testing of echo cancellers using a white noise test signal
    4.
    发明授权
    Performance testing of echo cancellers using a white noise test signal 有权
    使用白噪声测试信号进行回声消除器的性能测试

    公开(公告)号：US08731184B2

    公开(公告)日：2014-05-20

    申请号：US13471984

    申请日：2012-05-15

    申请人： Bing Chen ,  James H. James

    发明人： Bing Chen ,  James H. James

    IPC分类号： H04M9/08 ,  H04M3/26

    CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

    摘要： Test equipment including a signal generator and a method of generating a test signal associated with an overall frequency band are disclosed. Also disclosed is a method of using the test signal to test an echo canceller. The method of generating the test signal includes generating a first time segment associated with a first frequency sub-band of the overall frequency band and generating a second time segment associated with a second frequency sub-band of the overall frequency band. The second frequency sub-band is higher than the first frequency sub-band. The method further includes generating a time gap segment separating the first time segment and the second time segment.

    摘要翻译： 公开了包括信号发生器和产生与总频带相关联的测试信号的方法的测试设备。 还公开了使用测试信号来测试回波消除器的方法。 产生测试信号的方法包括产生与整个频带的第一频率子带相关联的第一时间段，并且产生与整个频带的第二频率子带相关联的第二时间段。 第二频率子带高于第一频率子带。 该方法还包括产生分离第一时间段和第二时间段的时间间隔段。

    Performance Testing of Echo Cancellers Using a White Noise Test Signal
    7.
    发明申请
    Performance Testing of Echo Cancellers Using a White Noise Test Signal 有权
    使用白噪声测试信号的回波消除器的性能测试

    公开(公告)号：US20120230474A1

    公开(公告)日：2012-09-13

    申请号：US13471984

    申请日：2012-05-15

    申请人： Bing Chen ,  James H. James

    发明人： Bing Chen ,  James H. James

    IPC分类号： H04M1/24

    CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

    摘要： Test equipment including a signal generator and a method of generating a test signal associated with an overall frequency band are disclosed. Also disclosed is a method of using the test signal to test an echo canceller. The method of generating the test signal includes generating a first time segment associated with a first frequency sub-band of the overall frequency band and generating a second time segment associated with a second frequency sub-band of the overall frequency band. The second frequency sub-band is higher than the first frequency sub-band. The method further includes generating a time gap segment separating the first time segment and the second time segment.

    摘要翻译： 公开了包括信号发生器和产生与总频带相关联的测试信号的方法的测试设备。 还公开了使用测试信号来测试回波消除器的方法。 产生测试信号的方法包括产生与整个频带的第一频率子带相关联的第一时间段，并且产生与整个频带的第二频率子带相关联的第二时间段。 第二频率子带高于第一频率子带。 该方法还包括产生分离第一时间段和第二时间段的时间间隔段。

    Method for the performance testing of echo cancellers using an artificial segmented test signal
    8.
    发明授权
    Method for the performance testing of echo cancellers using an artificial segmented test signal 失效
    使用人工分段测试信号进行回声消除器性能测试的方法

    公开(公告)号：US07636436B2

    公开(公告)日：2009-12-22

    申请号：US10740102

    申请日：2003-12-17

    申请人： Bing Chen ,  James H. James

    发明人： Bing Chen ,  James H. James

    IPC分类号： H04M9/08

    CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

    摘要： A method for the performance testing of an echo canceller including the steps of transmitting a test signal to the echo canceller, recording an echo energy signal output from the echo canceller as a result of the test signal, measuring the energy and duration of the echo energy signal and calculating a performance score for the echo canceller based on the measured energy and duration of the echo energy signal, wherein the test signal transmitted to the echo canceller has a plurality of discrete frequency band segments of white noise representing sub-bands of an overall bandwidth ranging from about 0 kHz to about 3.5 kHz. The test signal preferably has four discrete frequency band segments of white noise, wherein each discrete frequency band segment of the test signal is repeated in succession, whereby the test signal has a total of eight segments. Thus, the test signal can have a first frequency band segment having a bandwidth of about 0 kHz to about 1 kHz, a second frequency band segment having a bandwidth of about 1 kHz to about 2 kHz, a third frequency band segment having a bandwidth of about 2 kHz to about 3 kHz and a fourth frequency band segment having a bandwidth of about 3 kHz to about 3.5 kHz.

    摘要翻译： 一种用于回波消除器的性能测试的方法，包括以下步骤：将测试信号发送到回波消除器，记录作为测试信号从回声消除器输出的回波能量信号，测量回波能量的能量和持续时间 信号，并且基于所测量的回波能量信号的能量和持续时间来计算回波消除器的性能得分，其中发送到回波消除器的测试信号具有表示整体的子带的白噪声的多个离散频带段 带宽范围从约0 kHz到约3.5 kHz。 测试信号优选地具有白噪声的四个离散频带段，其中连续地重复测试信号的每个离散频带段，由此测试信号共有八个段。 因此，测试信号可以具有带宽为约0kHz至约1kHz的第一频带段，具有大约1kHz至大约2kHz的带宽的第二频带段，带宽为 约2kHz至约3kHz的频带段和具有约3kHz至约3.5kHz的带宽的第四频带段。

    Voice activity detection and silence suppression in a packet network
    9.
    发明授权
    Voice activity detection and silence suppression in a packet network 有权
    分组网络中的语音活动检测和静音抑制

    公开(公告)号：US08112273B2

    公开(公告)日：2012-02-07

    申请号：US12647863

    申请日：2009-12-28

    申请人： James H. James ,  Joshua Hal Rosenbluth

    发明人： James H. James ,  Joshua Hal Rosenbluth

    IPC分类号： G10L15/20

    CPC分类号： G10L19/167 ,  G10L19/012 ,  G10L25/78 ,  H04J3/17 ,  H04L65/1059 ,  H04L65/80

    摘要： The present invention is a system and method that improves upon voice activity detection by packetizing actual noise signals, typically background noise. In accordance with the present invention an access network receives an input voice signal (including noise) and converts the input voice signal into a packetized voice signal. The packetized voice signal is transmitted via a network to an egress network. The egress network receives the packetized voice signal, converts the packetized voice signal into an output voice signal, and outputs the output voice signal. The egress network also extracts and stores noise packets from the received packetized voice signal and converts the packetized noise signal into an output noise signal. When the access network ceases to receive the input voice signal while the call is still ongoing, the access network instructs the egress network to continually output the output noise signal.

    摘要翻译： 本发明是一种系统和方法，其通过打包实际的噪声信号（通常是背景噪声）来改善语音活动检测。 根据本发明，接入网接收输入语音信号（包括噪声），并将输入的语音信号转换为分组语音信号。 分组化语音信号经由网络传输到出口网络。 出口网络接收分组语音信号，将分组语音信号转换为输出语音信号，并输出输出语音信号。 出口网络还从接收的分组语音信号中提取并存储噪声分组，并将分组化的噪声信号转换成输出噪声信号。 当接入网络在呼叫仍然进行时停止接收输入语音信号，接入网络指示出口网络连续地输出输出噪声信号。

    METHOD AND APPARATUS FOR IDENTIFYING A FAULT IN A COMMUNICATION PATH
    10.
    发明申请
    METHOD AND APPARATUS FOR IDENTIFYING A FAULT IN A COMMUNICATION PATH 有权
    用于识别通信路径中的故障的方法和装置

    公开(公告)号：US20090161835A1

    公开(公告)日：2009-06-25

    申请号：US12395176

    申请日：2009-02-27

    申请人： WALLACE SMITH ,  James H. James ,  David Ramsden

    发明人： WALLACE SMITH ,  James H. James ,  David Ramsden

    IPC分类号： H04M1/24 ,  H04M9/08

    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。