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公开(公告)号：EP3777114A1
公开(公告)日：2021-02-17
申请号：EP19722730.9
申请日：2019-03-29
申请人： Bose Corporation
发明人： YEO, Xiang-Ern
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3.发明授权ECHO CANCELING APPARATUS, ECHO CANCELING METHOD, AND TELEPHONE COMMUNICATION APPARATUS 有权回声消除设备，回声消除方法和电话通信设备
公开(公告)号：EP2816734B1
公开(公告)日：2017-05-10
申请号：EP13748795.5
申请日：2013-02-07
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公开(公告)号：EP1787456B1
公开(公告)日：2013-07-17
申请号：EP05784122.3
申请日：2005-09-08
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公开(公告)号：EP2117221A3
公开(公告)日：2009-11-18
申请号：EP09004814.1
申请日：2009-04-01
发明人： Beiten, Ingolf , Kratzer, Bernhard
CPC分类号： H04R1/1091
摘要： The invention relates to a device and a method for generating a side tone (84), in particular for application in aviation and space technology. The device comprises a headset (50) with a microphone and earphones for the acquisition of an original signal (80) and for the reproduction of a side tone (84), a communication unit (43, 40) for connecting and controlling the headset (50), and a transmit/receive module (20). The device for generating the side tone (84) is characterised in that it furthermore comprises a comparator (60) which receives both the signal (81) that enters the transmit/receive module (20) and the signal (82) that is in fact being transmitted by the transmit/receive module (20), and in that it determines that the original signal (80) is actually being transmitted. In this case the comparator (60) instructs the communication unit (43, 40) to output the original signal (80) as a side tone (84) by way of the earphone of the headset (50).
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6.发明公开A METHOD FOR ENHANCING THE ACOUSTIC ECHO CANCELLATION SYSTEM USING RESIDUAL ECHO FILTER 有权方法用于扩展声ECHOL SCHSYSTEMS利用休息回波滤波器
公开(公告)号：EP1639791A4
公开(公告)日：2009-07-22
申请号：EP04743802
申请日：2004-06-24
申请人： NOKIA CORP
发明人： MYLLYLAE VILLE , ENZNER GERALD
CPC分类号： H04M9/082
摘要： This invention discloses an improvement to a digital Acoustic Echo Control (AEC) in hands-free telephones. It describes an additional adaptive filter referred to as a residual echo filter, which is placed after the usual echo canceller and it is used to efficiently and accurately estimate a residual echo signal b(i) and a system coupling factor ß(i), which can be utilized to establish an efficient control for the AEC system and construct the appropriate filters. The invention also describes a control block means performing a joint operation control of the echo canceller, residual echo suppressor and residual echo filter for achieving more consistent echo cancellation results and enhancing output signal quality.
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7.发明授权SIDE-TONE CONTROL WITHIN A TELECOMMUNICATION INSTRUMENT 有权CONTROL IN ARÜCKHÖRUNTERDRÜCKUNGTELEKOMMUNIKATIONSINSGERÄT
公开(公告)号：EP1350378B1
公开(公告)日：2008-04-09
申请号：EP02702243.3
申请日：2002-01-08
IPC分类号： H04M1/58
CPC分类号： H04M1/585
摘要： A side-tone control unit for a telecommunication instrument (1) is configured to include a side-tone amplifier (30) having a transfer function selectively controlled in accordance with a set of amplifier parameters, and a side-tone controller (40), coupled to the side-tone amplifier (30), for selectively applying the set of amplifier parameters to the side-tone amplifier (30) based on the detected energy of an uplink signal and the detected energy of a downlink signal. The side tone controller (40) can select a particular set of amplifier parameters by indexing a table (80) in accordance with quantized values of the detected uplink signal energy and the detected downlink signal energy.
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公开(公告)号：EP1787456A1
公开(公告)日：2007-05-23
申请号：EP05784122.3
申请日：2005-09-08
摘要： A telephone line interface and side-tone attenuation circuit includes two opto-electric converters. The first has an input interconnected to receive a signal proportional to a near-end signal, and an output interconnected to modulate a current proportional to the near-end signal onto the subscriber loop. The second has its input interconnected to provide a signal proportional to a current on the subscriber loop, including the current proportional to the near-end signal, at its output. A summing amplifier receives signals proportional to the output voltage of the second opto-electric converter and a signal proportional to the near-end signal. The output voltage of the second opto-electric amplifier includes a component that is substantially 180° out of phase with the near-end signal, allowing the near-end signal to be cancelled at the summing amplifier.
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9.发明公开ECHO CANCELLER EMPLOYING DUAL-H ARCHITECTURE HAVING IMPROVED NON-LINEAR ECHO PATH DETECTION 审中-公开ECHO正在办理与改进的非线性回声路径检测双滤波器架构
公开(公告)号：EP1042903A4
公开(公告)日：2007-05-02
申请号：EP98957966
申请日：1998-11-13
发明人： LABERTEAUX KENNETH P
摘要： An echo canceller circuit (25) for use in an echo canceller system is set forth that provides sensitive non-linear echo path response detection (300). The echo canceller circuit (25) comprises a first digital filter (35) having non-adaptive tap coefficients to simulate an echo response occurring during a call. A second digital filter (30) having adaptive tap coefficients to simulate an echo response occurring during a call. The adaptive tap coefficients of the second digital filter are updated over the duration of the call. A coefficient transfer controller is disposed in the echo canceller circuit (25) to a transfer the adaptive tap coefficients of the second digital filter to replace the tap coefficients of the first digital filter when a set of one or more transfer conditions is met. A non-linear echo path response detector (300) is provided. The non-linear echo path detector is responsive to one or more parameters of the first and second digital filters to detect a non-linear path condition. In accordance with one embodiment of the present invention, the non-linear echo path detector (300) is responsive to a transfer density value corresponding to a number of transfers executed by the coefficient transfer controller (65). In accordance with a further embodiment of the present invention, the non-linear echo path detector (300) is responsive to a coefficient time dispersion characteristic of the second digital filter for detecting a non-linear path condition.
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公开(公告)号：EP1655856A1
公开(公告)日：2006-05-10
申请号：EP04747166.9
申请日：2004-07-01
CPC分类号： H04M9/082
摘要： [PROBLEM]
It is an object of the present invention to provide a voice communication apparatus which can prevent its echo suppressing characteristic from being deteriorated in response to the varied relative location of the microphone unit with respect to the speaker unit, and maintain the quality of the near-end signal to be transmitted to the far-end speaker.
[MEANS FOR SOLVING]
Herein disclosed is a voice communication apparatus to be provided with a current value detecting unit 131 for detecting a current parameter value related to the relative location of either the first near-end voice converting unit 121 or the second near-end voice converting unit 122 with respect to the far-end signal converting unit 112, each of the first and second near-end signal delay sections 133 and 134 being operative to delay the near-end signal on the basis of the current parameter value detected by the current value detecting unit 131, and the first outputting section 135 being operative to output a signal indicative of the signal difference between the near-end signals respectively delayed by the first and second near-end signal delay sections 133 and 134.摘要翻译： 本发明的一个目的是提供一种能够防止其回波抑制特性响应于麦克风单元相对于扬声器单元的变化的相对位置而劣化的语音通信设备，并且保持质量 要发送到远端扬声器的近端信号。 本发明提供一种语音通信装置，其具有电流值检测单元131，用于检测与第一近端语音转换单元121或第二近端的相对位置相关的当前参数值 语音转换单元122相对于远端信号转换单元112，第一和第二近端信号延迟部分133和134中的每一个可操作以基于由当前参数值检测到的当前参数值来延迟近端信号 当前值检测单元131和第一输出单元135可操作以输出指示分别由第一和第二近端信号延迟单元133和134延迟的近端信号之间的信号差的信号。
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