利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

45 条记录 (耗时 0.012 秒)

    Verfahren und Vorrichtung zur Verarbeitung rauschbehafteter Schallsignale
    33.
    发明公开
    Verfahren und Vorrichtung zur Verarbeitung rauschbehafteter Schallsignale 审中-公开
    为噪声的声音信号的处理方法和装置

    公开(公告)号：EP1014340A2

    公开(公告)日：2000-06-28

    申请号：EP99125575.3

    申请日：1999-12-21

    申请人： Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.

    发明人： Hegger, Rainer, Dr. ,  Kantz, Holger, Dr. ,  Matassini, Lorenzo

    IPC分类号： G10L21/02

    CPC分类号： G10L21/0208 ,  G10L2021/02163 ,  H04R2225/43

    摘要： Zur Signalverarbeitung eines Schallsignals y, in dem eine Redundanz enthalten ist, die hauptsächlich aus annähernden Wiederholungen von Signalprofilen besteht, werden die Signalprofile erfaßt und Korrelationen zwischen den Signalprofilen innerhalb von Abschnitten des Schallsignals erfaßt. Korrelierte Signalanteile werden einem Leistungsanteil und unkorrelierte Signalanteile einem Rauschanteil des Schallsignals zugeordnet. Die Korrelationen zwischen den Signalprofilen werden mit Verfahren der nichtlinearen Rauschreduzierung in deterministischen Systemen in rekonstruierten Vektorräumen ermittelt, die auf der Zeitdomäne basieren.

    摘要翻译： 对于一个声音信号y，其中包括一个冗余，其主要由那信号轮廓被记录，并且检测所述声音信号的部分内的信号轮廓之间的相关性信号轮廓近似重复的信号处理。 相关的信号分量分配到一个功率分量和不相关的信号分量的声音信号的噪声分量。 所述信号轮廓之间的相关性是通过在重建的向量空间在确定性系统的非线性噪声降低是基于时域的方法来确定。

    Adaptive noise reduction circuit for a sound reproduction system
    34.
    发明公开
    Adaptive noise reduction circuit for a sound reproduction system 失效
    自适应Geräuschverminderungsschaltungfürein Schallwiedergabesystem。

    公开(公告)号：EP0558312A1

    公开(公告)日：1993-09-01

    申请号：EP93301401.1

    申请日：1993-02-25

    申请人： CENTRAL INSTITUTE FOR THE DEAF

    发明人： Engebretson, Maynard A. ,  O'Connell, Michael P.

    IPC分类号： H04R25/00 ,  G10L3/02 ,  H03H21/00

    CPC分类号： G10L21/0208 ,  G10L21/0216 ,  G10L2021/02163 ,  H04R25/505 ,  H04R2225/41

    摘要： A noise reduction circuit for a hearing aid having an adaptive filter for producing a signal which estimates the noise components present in an input signal. The circuit includes a second filter for receiving the noise-estimating signal and modifying it as a function of a user's preference or as a funtion of an expected noise environment. The circuit also includes a gain control for adjusting the magnitude of the modified noise-estimating signal, thereby allowing for the adjustment of the magnitude of the circuit response. The circuit also includes a signal combiner for combining the input signal with the adjusted noise-estimating signal to produce a noise reduced output signal.

    摘要翻译： 一种用于助听器的噪声降低电路，具有用于产生估计输入信号中存在的噪声分量的信号的自适应滤波器。 电路包括用于接收噪声估计信号并根据用户偏好或作为预期噪声环境的功能进行修改的第二滤波器。 电路还包括用于调整修改的噪声估计信号的幅度的增益控制，从而允许调整电路响应的幅度。 该电路还包括用于将输入信号与经调整的噪声估计信号组合以产生噪声减小的输出信号的信号组合器。

    ACOUSTIC ECHO MITIGATION APPARATUS AND METHOD, AUDIO PROCESSING APPARATUS AND VOICE COMMUNICATION TERMINAL
    35.
    发明授权
    ACOUSTIC ECHO MITIGATION APPARATUS AND METHOD, AUDIO PROCESSING APPARATUS AND VOICE COMMUNICATION TERMINAL 有权
    声学回声减弱装置和方法，音频处理装置和语音通信终端

    公开(公告)号：EP2973557B1

    公开(公告)日：2017-05-17

    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，一种音频处理装置和一种语音通信终端。 根据一个实施例，提供了一种声学回声减轻装置，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; 残余回声估计器，用于估计残留回声功率; 以及声学回声抑制器，用于基于残余回声功率和噪声功率进一步抑制误差信号中的残留回声和噪声。 这里，残余回声估计器被配置为连续适应于误差信号中的功率变化。 根据本申请的实施例，声学回声减轻装置和方法至少可以很好地适应AEC处理之后的误差信号的功率变化，诸如由双方通话状态的改变引起的误差信号的功率变化， 回声路径属性，噪声水平等。

    DYNAMIC THRESHOLD METHODS, SYSTEMS, COMPUTER READABLE MEDIA, AND PROGRAM CODE FOR FILTERING NOISE AND RESTORING ATTENUATED HIGH-FREQUENCY COMPONENTS OF ACOUSTIC SIGNALS
    36.
    发明公开
    DYNAMIC THRESHOLD METHODS, SYSTEMS, COMPUTER READABLE MEDIA, AND PROGRAM CODE FOR FILTERING NOISE AND RESTORING ATTENUATED HIGH-FREQUENCY COMPONENTS OF ACOUSTIC SIGNALS 审中-公开
    FOR动态阈值，系统，滤除噪声和恢复计算机可读介质和程序代码的方法减弱声音信号中的高频分量

    公开(公告)号：EP3044789A1

    公开(公告)日：2016-07-20

    申请号：EP14777231.3

    申请日：2014-09-12

    申请人： Saudi Arabian Oil Company

    发明人： YANG, Yunlai

    IPC分类号： G10L21/0208

    CPC分类号： G01V1/364 ,  G01N29/11 ,  G01N29/32 ,  G01V1/40 ,  G01V2210/324 ,  G01V2210/40 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02163

    摘要： Methods, systems, computer readable media, and program code (51) to provide for filtering noise and/or restoring attenuated spectral components in acoustic signals (410), are provided. An exemplary embodiment of a method includes dynamically filtering each of a plurality of raw fft data samples (420) of a record to remove or attenuate background noise contained therein to thereby produce a corresponding plurality of cleaned fft data samples (430). The sample-specific background noise is removed or attenuated by a record-specific dynamic filter (640) to produce the corresponding cleaned fft data samples (430). The method can also include restoring the attenuated high-frequency components of the cleaned data samples through application of a record-specific restoring processor (930) at least partially defined by a portion of the cleaned data samples and a Gain Function to thereby produce cleaned and restored data samples, and applying an inverse transformation to convert the cleaned and restored data samples into cleaned and restored data samples in time domain data (732). An exemplary system (30), computer readable media, and program code is configured to perform the exemplary method.

    摘要翻译： 系统，计算机可读介质和程序代码，以提供滤波的噪声和/或声学信号恢复衰减频谱分量，提供。 一个系统的示例性实施例被配置为动态过滤其中所含从而产生清洁FFT数据样本的相应的多个记录样本的原始FFT数据以去除或衰减背景噪声的多个每。 特定样品的背景噪声被去除或通过记录专用动态滤波器衰减以产生相应的净化的FFT数据样本。 因此，该系统可以执行通过由清洗的数据样本的一个部分和增益函数至少部分地限定的记录专用恢复处理器的应用恢复清洁的数据样本的衰减高频分量的，从而产生清洁的操作和 恢复的数据样本，并应用到逆变换，以清洁和恢复的数据样本到清洁和恢复后的数据样本转换中的时域数据。

    NARROW BAND NOISE REDUCTION FOR SPEECH ENHANCEMENT
    38.
    发明公开
    NARROW BAND NOISE REDUCTION FOR SPEECH ENHANCEMENT 审中-公开
    降噪用于与远程场麦克风上的控制台的电子装置

    公开(公告)号：EP2012725A2

    公开(公告)日：2009-01-14

    申请号：EP07759884.5

    申请日：2007-03-30

    申请人： Sony Computer Entertainment Inc.

    发明人： MAO, Xiadong

    IPC分类号： A61F11/06 ,  G10K11/16 ,  H03B29/00 ,  H04B15/00 ,  G10L15/00 ,  G10L15/20

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

    摘要： Reduction of noise in a device having a console with one or more microphones and a source of narrow band distributed noise located on the console is disclosed. A microphone signal containing a broad band distributed desired sound and narrow band distributed noise is divided amongst a plurality of frequency bins. For each frequency bin, it is determined whether a portion of the signal within the frequency bin belongs to a narrow band distribution characteristic of the source of narrow band noise located on the console. Any frequency bins containing portions of the signal belonging to the narrow band distribution are filtered to reduce the narrow band noise.