公开(公告)号：EP2973557A1

公开(公告)日：2016-01-20

申请号：EP14714515.5

申请日：2014-03-10

申请人： Dolby Laboratories Licensing Corporation

发明人： SHI, Dong ,  SUN, Xuejing ,  DICKINS, Glenn N.

IPC分类号： G10L21/0208 ,  H04M9/08

CPC分类号： G10L21/0232 ,  G10L21/0208 ,  G10L25/21 ,  G10L25/60 ,  G10L2021/02082 ,  G10L2021/02163 ,  H04M9/082

摘要： The present application provides an acoustic echo mitigation apparatus and method, an audio processing apparatus and a voice communication terminal. According to an embodiment, an acoustic echo mitigation apparatus is provided, including: an acoustic echo canceller for cancelling estimated acoustic echo from a microphone signal and outputting an error signal; a residual echo estimator for estimating residual echo power; and an acoustic echo suppressor for further suppressing residual echo and noise in the error signal based on the residual echo power and noise power. Here, the residual echo estimator is configured to be continuously adaptive to power change in the error signal. According to the embodiments of the present application, the acoustic echo mitigation apparatus and method can, at least, be well adaptive to the change of power of the error signal after the AEC processing, such as that caused by change of double-talk status, echo path properties, noise level and etc.

摘要翻译： 本申请提供了一种声学回声减轻装置和方法，音频处理装置和语音通信终端。 根据一个实施例，提供了一种声学回声消除装置，包括：声学回声消除器，用于从麦克风信号中消除估计的声学回声并输出误差信号; 用于估计残余回波功率的残余回波估计器; 以及声学回波抑制器，用于基于残余回波功率和噪声功率来进一步抑制误差信号中的残余回波和噪声。 这里，残差回波估计器被配置为连续地适应于误差信号中的功率变化。 根据本申请的实施例，声学回声缓解装置和方法至少可以很好地适应于AEC处理之后的误差信号的功率变化，例如由双方通话状态的改变引起的， 回波路径属性，噪声水平等

公开(公告)号：EP1661433B1

公开(公告)日：2014-06-04

申请号：EP04740475.1

申请日：2004-06-30

申请人： Sony Ericsson Mobile Communications AB

发明人： GUSTAVSSON, Stefan

IPC分类号： G10L25/00

CPC分类号： G10L25/00 ,  G10L2021/02163 ,  H04R25/453 ,  H04R2410/07 ,  H04R2499/11

公开(公告)号：EP2495724A1

公开(公告)日：2012-09-05

申请号：EP12154134.6

申请日：2012-02-07

申请人： Siemens Medical Instruments Pte. Ltd.

发明人： Rosenkranz, Tobias

IPC分类号： G10L21/02

CPC分类号： G10L21/0232 ,  G10L2021/02163 ,  G10L2021/065 ,  H04R25/00 ,  H04R25/50 ,  H04R2225/43

摘要： Dynamische Störgeräusche sollen besser geschätzt werden können. Hierzu wird eine Vorrichtung und ein Verfahren zum Schätzen eines Störgeräusches durch Bereitstellen eines Werts (X (e jΩ )) für die Leistungsdichte eines Gesamtsignals, das ein Nutzsignal und das zu schätzende Störgeräusch enthält, in einem aktuellen Zeitfenster, Vergleichen des Werts des Gesamtsignals mit einem mit einem Verstärkungsfaktor (1 + ε) multiplizierten Schätzwert eines Störgeräusches aus einem dem aktuellen Zeitfenster vorausgehenden Zeitfenster (19) und Verwenden des kleineren (17) der beiden Werte des Vergleichs als Vorschätzwert für das Störgeräusch in dem aktuellen Zeitfenster. Außerdem wird ein Codebuchschätzwert ( Ŝ nnCB (e jΩ )) für das Störgeräusch in dem aktuellen Zeitfenster bereitgestellt. Schließlich wird der größere Wert (27) von dem Vorschätzwert und dem Codebuchschätzwert als Schätzwert ( Ŝ nn (e jΩ )) für das Störgeräusch in dem aktuellen Zeitfenster verwendet.

摘要翻译： 该方法涉及获得从听力装置输出的噪声信号的功率密度值。 通过乘以增益因子将总噪声信号值与当前时间窗口的预设干扰值进行比较。 基于比较结果估计当前时隙的背景噪声，以便在当前时间窗口中提供背景噪声的估计值。 包括以下独立权利要求：（1）估计背景噪声的装置; 和（2）听力装置。

公开(公告)号：EP2014132A2

公开(公告)日：2009-01-14

申请号：EP07759872.0

申请日：2007-03-30

申请人： Sony Computer Entertainment Inc.

发明人： MAO, Xiadong

IPC分类号： H04R3/00

CPC分类号： G10L21/0208 ,  G10L25/18 ,  G10L2021/02163 ,  H04M9/082

摘要： Methods and apparatus for echo cancellation in a system having a speaker and a microphone are disclosed. The speaker receives a speaker signal x(t). The microphone receives a microphone signal d(t) containing a local signal s(t) and an echo signal x1(t) that is dependent on the speaker signal x(t). The microphone signal d(t) is filtered in parallel with first and second adaptive filters having complementary echo cancellation properties relative to each other. A minimum echo output e3(t) is determined from an output e1(t) of the first adaptive filter and an output e2(t) of the second adaptive filter. The minimum echo output has a smaller energy and less correlation to the speaker signal x(t). A microphone output is then generated using the minimum echo output e3(t).

公开(公告)号：EP0977176A3

公开(公告)日：2003-07-16

申请号：EP99305952.6

申请日：1999-07-27

申请人： CANON KABUSHIKI KAISHA

发明人： Nakagawa, Kenichiro ,  Komori, Yasuhiro ,  Kosaka, Tetsuo

IPC分类号： G10L15/20 ,  G10L11/02

CPC分类号： G10L15/20 ,  G10L21/0232 ,  G10L2021/02163

摘要： The invention intends to successively extract a proper speech zone from a speech inputted in such a fashion that noise is mixed in a speech to be recognized, and to remove noise from the detected speech zone. To this end, a noise position is estimated from an input waveform, a speech zone is detected from a speech inputted subsequently by using power information of a speech at the estimated noise position, and noise is removed from the speech in the detected speech zone by using spectrum information of the speech at the estimated noise position. Further, the estimated noise zone is updated as appropriate by using a result of comparison between the power information of the input speech and the power information of the speech in the estimated noise zone so that the noise position is always properly estimated.

公开(公告)号：EP0961414A2

公开(公告)日：1999-12-01

申请号：EP99117212.3

申请日：1993-01-13

申请人： THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY

发明人： Lim, Jae S.

IPC分类号： H04B1/66

CPC分类号： H04B1/667 ,  G10L19/0204 ,  G10L19/0208 ,  G10L19/0212 ,  G10L25/27 ,  G10L2021/02163

摘要： An audio signal is encoded. The signal is first divided into bands (600) for each a band a "yardstick" signal element is selected (608), and its quantized magnitude used for allocating lists, with less accuracy for quanitzing non-yardstick signal elements (624) the encoded signal is later decoded (918, 926).

摘要翻译： 音频信号被编码。 信号首先被分成频带（600），每个频带选择“尺码”信号元素（608），并且其用于分配列表的量化幅度，对于非标尺信号元素（624）的校准精度较低，编码 信号后来被解码（918,926）。

公开(公告)号：EP0628195A1

公开(公告)日：1994-12-14

申请号：EP93903484.0

申请日：1993-01-13

申请人： THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY

发明人： LIM, Jae, S.

IPC分类号： G10L19 ,  H04B1 ,  G10L21

CPC分类号： H04B1/667 ,  G10L19/0204 ,  G10L19/0208 ,  G10L19/0212 ,  G10L25/27 ,  G10L2021/02163

摘要： Un signal audio est codé. Le signal est d'abord divisé en bandes (600), et pour chaque bande un élément de signal "mètre pliant" est sélectionné (608), et son intensité quantifiée est utilisée à l'affectation de bits, la précision de quantification d'éléments de signaux "non mètre pliant" (624) étant moindre. Le signal codé est ensuite décodé (918, 926).

公开(公告)号：EP3175456A1

公开(公告)日：2017-06-07

申请号：EP15747424.8

申请日：2015-07-30

申请人： Koninklijke KPN N.V. ,  Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO

发明人： STOKKING, Hans Maarten ,  NIAMUT, Omar Aziz ,  THOMAS, Emmanuel

IPC分类号： G10L21/0208

CPC分类号： G10L21/0208 ,  G10L21/0216 ,  G10L21/0224 ,  G10L21/0308 ,  G10L2021/02163 ,  H04H2201/50

摘要： A play-out device is provided for playing out an audio signal via a speaker to provide a sound signal, and a recording device for recording the sound signal to obtain a recorded signal comprising a recording of at least the sound signal. The play-out device is configured for generating noise suppression data comprising the audio signal, or a reference thereto, and timing information for enabling the audio signal to be correlated in time with the recorded signal. A noise suppression subsystem is provided with the recorded signal and the noise suppression data. The noise suppression subsystem comprises a timing manager for synchronizing the audio signal with the recorded signal based on the timing information, and a noise suppressor for processing the recorded signal based on said synchronized audio signal to obtain a processed signal in which the recording of the sound signal is suppressed. The noise suppression subsystem is thus enabled to perform noise suppression, even when not comprised in the play-out device but rather in another device such as the recording device.

摘要翻译： 提供播放装置，用于通过扬声器播放音频信号以提供声音信号，以及记录装置，用于记录声音信号以获得包括至少记录声音信号的记录信号。 播出设备被配置用于生成包括音频信号或其对于其的参考的噪声抑制数据以及用于使音频信号能够与所记录的信号在时间上相关的定时信息。 噪声抑制子系统提供有记录信号和噪声抑制数据。 噪声抑制子系统包括：定时管理器，用于基于定时信息使音频信号与记录信号同步;以及噪声抑制器，用于基于所述同步音频信号处理记录信号，以获得处理后的信号，其中声音的记录 信号被抑制。 噪声抑制子系统因此能够执行噪声抑制，即使当不包括在播出装置中而是包含在诸如记录装置的另一装置中时。

公开(公告)号：EP2230664A1

公开(公告)日：2010-09-22

申请号：EP09004056.9

申请日：2009-03-20

申请人： Harman Becker Automotive Systems GmbH

发明人： Iser, Bernd ,  Schmidt, Gerhard ,  Roder, Mathias

IPC分类号： G10L21/02 ,  H03G3/34 ,  H03G3/20 ,  H03G3/30

CPC分类号： H03G3/32 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02163

摘要： The invention provides a method for attenuating noise in an input signal, the method comprising the steps of: receiving the input signal, estimating the power of the input signal to obtain an input power estimate, determining a noise power value based on the input power estimate, the noise power value corresponding to an estimate of the noise power within the input signal, determining an attenuation factor based on the noise power value, and attenuating the input signal using the attenuation factor.

摘要翻译： 本发明提供了一种用于衰减输入信号中的噪声的方法，该方法包括以下步骤：接收输入信号，估计输入信号的功率以获得输入功率估计，基于输入功率估计确定噪声功率值 ，噪声功率值对应于输入信号内的噪声功率的估计，基于噪声功率值确定衰减因子，以及使用衰减因子衰减输入信号。

公开(公告)号：EP1450354B1

公开(公告)日：2006-06-21

申请号：EP04003811.9

申请日：2004-02-19

申请人： Harman Becker Automotive Systems-Wavemakers, Inc.

发明人： Hetherington, Phil ,  Li, Xueman ,  Zakarauskas, Pierre

IPC分类号： G10L21/02

CPC分类号： G10L21/0232 ,  G10L21/0208 ,  G10L21/0264 ,  G10L2021/02163 ,  H04R2410/07

摘要： The invention includes a method, apparatus, and computer program to selectively suppress wind noise while preserving narrow-band signals in acoustic data. Sound from one or several microphones is digitized into binary data. A time-frequency transform is applied to the data to produce a series of spectra. The spectra are analyzed to detect the presence of wind noise and narrow band signals. Wind noise is selectively suppressed while preserving the narrow band signals. The narrow band signal is interpolated through the times and frequencies when it is masked by the wind noise. A time series is then synthesized from the signal spectral estimate that can be listened to. This invention overcomes prior art limitations that require more than one microphone and an independent measurement of wind speed. Its application results in good-quality speech from data severely degraded by wind noise.