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1. 发明申请

US20030223575A1 Line echo cancellation system 有权
标题翻译：线路回波消除系统
公开(公告)号：US20030223575A1
公开(公告)日：2003-12-04
申请号：US10448155
申请日：2003-05-29
申请人： MITEL KNOWLEDGE CORPORATION
发明人： Mirjana Popovic , Dieter Schulz , Jan Radecki
IPC分类号： H04M009/08
CPC分类号： H04B3/23
摘要： An echo cancellation system for detecting and canceling echo from a network speech path, comprising a pool of echo locators for detecting pure echo delay and dispersion of time, a pool of echo cancellers, a pool of line watchdogs for detecting presence or absence of echo in the network speech path, and a control system for (i) locating and applying an echo locator from the pool of echo locators to the network speech path for detecting the pure echo delay and dispersion of time of any echo in the network speech path, and thereafter returning the echo locator to the pool of echo locators; (ii) locating and applying an echo canceller from the pool of echo cancellers to the network speech path for canceling the echo using the pure delay and dispersion time, and thereafter returning the echo canceller to the pool of echo cancellers; and (iii) locating and applying a line watchdog from the pool of line watchdogs to the network speech path for detecting said presence or absence of echo, and in the event the presence of said echo is detected then re-executing (i).
摘要翻译：一种用于检测和消除来自网络语音路径的回波的回波消除系统，包括用于检测纯回波延迟和时间分散的回波定位器池，回波消除器池，用于检测回波存在或不存在的线路监视器池网络语音路径和用于（i）将回波定位器从回波定位器池定位并应用到网络语音路径的控制系统，用于检测网络语音路径中的任何回波的纯回波延迟和时间的离散，以及然后将回波定位器返回到回波定位器池; （ii）使用回波消除器池将回波消除器定位并应用于网络语音路径，以使用纯延迟和分散时间来消除回波，然后将回波消除器返回到回波消除器池; 以及（iii）将来自线路看门狗的线路看门狗定位和应用到网络语音路径，以检测所述有无回声，并且在检测到所述回波的存在的情况下，然后重新执行（i）。

2. 发明申请

US20030223382A1 Echo canceller employing H-register and storage register 失效
标题翻译：回波消除器采用H寄存器和存储寄存器
公开(公告)号：US20030223382A1
公开(公告)日：2003-12-04
申请号：US10446359
申请日：2003-05-28
申请人： Mitel Knowledge Corporation
发明人： Mirjana Popovic , Dieter Schulz , Jan Radecki
IPC分类号： H04B003/20
CPC分类号： H04B3/23
摘要： An echo canceller comprising a digital filter having adaptive coefficients which are updated to simulate an echo response, a temporary register for storing default coefficients, and a controller for monitoring ERLE and in the event the ERLE is greater than a first predetermined threshold then enabling the digital filter and replacing the default coefficients in the temporary register with the adaptive coefficients, and in the event the ERLE is less than a second predetermined threshold then disabling the digital filter and replacing the adaptive coefficients with said the default coefficients from the temporary register.
摘要翻译：一种回声消除器，包括具有被更新以模拟回波响应的自适应系数的数字滤波器，用于存储默认系数的临时寄存器，以及用于监视ERLE的控制器，以及在所述ERLE大于第一预定阈值的情况下，过滤并用自适应系数替换临时寄存器中的默认系数，并且在ERLE小于第二预定阈值的情况下，禁用数字滤波器并用来自临时寄存器的所述默认系数替换自适应系数。

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