公开(公告)号：US20100150363A1

公开(公告)日：2010-06-17

申请号：US12316695

申请日：2008-12-15

申请人： James H. James ,  Wallace F. Smith, JR.

发明人： James H. James ,  Wallace F. Smith, JR.

IPC分类号： H04B3/20

CPC分类号： H04B3/23 ,  H04B3/493

摘要： The performance of an echo canceller is assessed using a) a test signal launched from originating test equipment and b) a simulated echo of the test signal launched from terminating test equipment. The launch of the simulated echo signal is timed in such a way that it arrives at the tandem echo canceller(s) at a point in time relative to the arrival of the test signal thereat that the tandem echo canceller(s) is (are) not able to cancel the simulated echo signal. The latter thus arrives uncanceled at the target echo canceller. The launch of the simulated echo signal is further timed in such a way that it arrives at the target echo canceller at a point in time relative to the arrival of the test signal thereat that the target echo canceller IS able to cancel the simulated echo signal. As a result, any residual echo received at the originating test equipment is a measure of the performance of the target echo canceller exclusive of the performance of the tandem echo canceller(s).

摘要翻译： 使用以下方式评估回声消除器的性能：a）从原始测试设备发射的测试信号，以及b）从终端测试设备发射的测试信号的模拟回波。 模拟回波信号的发射被定时，使得其在相对于测试信号到达的时间点到达串联回波消除器，其中串联回波消除器是（或） 不能取消模拟回波信号。 因此，后者到达目标回波消除器。 仿真回波信号的发射被进一步定时，使得其在相对于测试信号到达的时间点到达目标回波消除器，目标回波消除器IS能够消除模拟的回波信号。 因此，在始发测试设备处接收到的任何残余回波是除了串联回波消除器的性能之外的目标回波消除器的性能的度量。

公开(公告)号：US08295501B2

公开(公告)日：2012-10-23

申请号：US12316695

申请日：2008-12-15

申请人： James H James ,  Wallace F. Smith, Jr.

发明人： James H James ,  Wallace F. Smith, Jr.

IPC分类号： H04B3/20

CPC分类号： H04B3/23 ,  H04B3/493

摘要： The performance of an echo canceller is assessed using a) a test signal launched from originating test equipment and b) a simulated echo of the test signal launched from terminating test equipment. The launch of the simulated echo signal is timed in such a way that it arrives at the tandem echo canceller(s) at a particular point in time relative to the arrival of the test signal, at the tandem echo canceller(s), when the tandem echo canceller(s) is (are) not able to cancel the simulated echo signal. The latter thus arrives uncanceled at the target echo canceller. The launch of the simulated echo signal is further timed in such a way that it arrives at the target echo canceller at a point in time relative to the arrival of the test signal, at the target echo canceller, when the target echo canceller is able to cancel the simulated echo signal. As a result, any residual echo received at the originating test equipment is a measure of the performance of the target echo canceller exclusive of the performance of the tandem echo canceller(s).

摘要翻译： 使用以下方式评估回声消除器的性能：a）从原始测试设备发射的测试信号，以及b）从终端测试设备发射的测试信号的模拟回波。 模拟回波信号的发射被定时，使得其在串联回波消除器处在特定时间点到达串联回波消除器的时间相对于测试信号的到达，当 串联回波消除器（s）不能取消模拟的回波信号。 因此，后者到达目标回波消除器。 模拟回波信号的发射进一步定时，使得当目标回波消除器能够在目标回波消除器能够到达目标回波消除器时，其在相对于测试信号的到达的时间点到达目标回波消除器 取消模拟回波信号。 因此，在始发测试设备处接收到的任何残余回波是除了串联回波消除器的性能之外的目标回波消除器的性能的度量。

公开(公告)号：US07251213B2

公开(公告)日：2007-07-31

申请号：US10245769

申请日：2002-09-17

申请人： Bing Chen ,  Wallace F. Smith, Jr.

发明人： Bing Chen ,  Wallace F. Smith, Jr.

IPC分类号： H04J1/12

CPC分类号： H04B3/23 ,  H04B3/493 ,  H04L12/6418 ,  H04L2012/6491 ,  H04M3/002 ,  H04M3/2254

摘要： A method of measuring echo path delay in a circuit having echo cancellers after enabling an echo signal to pass through the echo cancellers. The known time for a given echo canceller to disable is subtracted from the overall test signal duration. This quantity can be subtracted from the overall echo duration to compute the echo path delay.

摘要翻译： 一种在使回波信号通过回波消除器之后测量具有回波消除器的电路中的回波路径延迟的方法。 从整体测试信号持续时间中减去给定回波消除器禁用的已知时间。 可以从总体回波持续时间中减去该数量以计算回波路径延迟。