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1. 发明申请

WO2003092184A1 ECHO CANCELLATION 审中-公开
标题翻译： ECHO取消
公开(公告)号：WO2003092184A1
公开(公告)日：2003-11-06
申请号：PCT/SE2003/000674
申请日：2003-04-25
申请人： GLOBAL IP SOUND AB , HÄNDEL, Peter , BERGENHEIM, Jon , REMLE, Susanne
发明人： HÄNDEL, Peter , BERGENHEIM, Jon , REMLE, Susanne
IPC分类号： H04B3/23
CPC分类号： H04B3/23
摘要： The present invention relates to a cancellation of echoes in telecommunications systems, more specifically it relates to adaptive alignment of a linear filter (500) used for echo cancellation. According to the invention, it is continuously determined, by means of control logic (520), if a reflection replica delay included in an echo replica signal (110), which delay is provided by a signal buffer (510), should be attempted to be increased or not. Similarly, it is continuously determined if the reflection replica delay should be attempted to be decreased or not. In this way it is possible to provide a delay of the reflection replica which corresponds to the pure delay of a corresponding reflection included in an echo signal (120) received over an echo path. The invention is advantageous since the filter (500) will continuously and quickly adapt to changes in the echo path delay by continuously increasing or decreasing, in an incremental and smooth manner, a present replica delay.
摘要翻译：本发明涉及电信系统中回波的消除，更具体地说，涉及用于回波消除的线性滤波器（500）的自适应对准。根据本发明，通过控制逻辑（520）连续地确定包括在回波复制信号（110）中的反射复制延迟，哪个延迟由信号缓冲器（510）提供，应该被试图增加或不增加类似地，连续地确定是否应该尝试减少反射复制延迟。以这种方式，可以提供对应于包括在通过回波路径接收的回波信号（120）中的对应反射的纯延迟的反射副本的延迟。本发明是有利的，因为过滤器（500）将通过以增量和平滑的方式连续地增加或减少当前复制延迟来连续且快速地适应回波路径延迟的变化。

2. 发明公开

EP1500210A1 ECHO CANCELLATION 有权转让
标题翻译：回声消除
公开(公告)号：EP1500210A1
公开(公告)日：2005-01-26
申请号：EP03723565.2
申请日：2003-04-25
申请人： Global IP Sound AB , Global IP Sound Europe AB
发明人： HÄNDEL, Peter , BERGENHEIM, Jon , REMLE, Susanne
IPC分类号： H04B3/23
CPC分类号： H04B3/23
摘要： The present invention relates to a cancellation of echoes in telecommunications systems, more specifically it relates to adaptive alignment of a linear filter (500) used for echo cancellation. According to the invention, it is continuously determined, by means of control logic (520), if a reflection replica delay included in an echo replica signal (110), which delay is provided by a signal buffer (510), should be attempted to be increased or not. Similarly, it is continuously determined if the reflection replica delay should be attempted to be decreased or not. In this way it is possible to provide a delay of the reflection replica which corresponds to the pure delay of a corresponding reflection included in an echo signal (120) received over an echo path. The invention is advantageous since the filter (500) will continuously and quickly adapt to changes in the echo path delay by continuously increasing or decreasing, in an incremental and smooth manner, a present replica delay.

3. 发明申请

WO2012160035A2 PROCESSING AUDIO SIGNALS 审中-公开
标题翻译：处理音频信号
公开(公告)号：WO2012160035A2
公开(公告)日：2012-11-29
申请号：PCT/EP2012/059400
申请日：2012-05-21
申请人： SKYPE , SORENSEN, Karsten Vandborg , BERGENHEIM, Jon
发明人： SORENSEN, Karsten Vandborg , BERGENHEIM, Jon
IPC分类号： H03G3/30 , H04M1/60
CPC分类号： H03G3/3089 , H04M1/6008 , H04M1/6016
摘要： A method of processing an audio signal transmitted from a remote transmitter and received at a local receiver of an acoustic system, includes at the receiver receiving with the audio signal an indication of remote transmitter gain, determining an overall system gain of the acoustic system from the remote transmitter gain and a local receiver gain and selectively applying a system gain reduction step to the audio signal if it is determined that the overall system gain exceeds a threshold.
摘要翻译：一种处理从远程发射机发送并在声学系统的本地接收机处接收的音频信号的方法包括在接收机处接收与音频信号相关的远程发射机增益的指示，从该系统的整体系统增益确定远程发射机增益和本地接收机增益，并且如果确定整个系统增益超过阈值，则选择性地将系统增益降低步骤应用于音频信号。

4. 发明申请

WO2009092709A1 ACOUSTIC ECHO REDUCTION 审中-公开
标题翻译：消声减速
公开(公告)号：WO2009092709A1
公开(公告)日：2009-07-30
申请号：PCT/EP2009/050596
申请日：2009-01-20
申请人： SKYPE LIMITED , SØRENSEN, Karsten Vandborg , BERGENHEIM, Jon , VOS, Koen
发明人： SØRENSEN, Karsten Vandborg , BERGENHEIM, Jon , VOS, Koen
IPC分类号： H04M9/08
CPC分类号： H04M9/085
摘要： A method for removing an echo component in a first signal received at an audio input device, said method comprising the steps of outputting a second signal from an audio output device, receiving at the audio input device the first signal wherein the echo component in the first signal is the result of the second signal traversing an echo path having a frequency response which defines the relationship between the echo component and the second signal; determining an echo path model indicating an estimate of the frequency response of the echo path; removing an estimate of the echo component from the first signal using the echo path model; detecting if the first signal is overloaded; and wherein if it is detected that the first signal is overloaded the step of determining an echo path mode! comprises determining an overload echo path model such that the estimate of the frequency response indicated by the overload echo path mode is only allowed to increase over time regardless of whether the frequency response of the echo path is decreasing over time.
摘要翻译：一种用于去除在音频输入装置接收的第一信号中的回波分量的方法，所述方法包括以下步骤：从音频输出装置输出第二信号，在音频输入装置处接收第一信号，其中第一信号中的回波分量信号是第二信号穿过具有定义回波分量和第二信号之间的关系的频率响应的回波路径的结果; 确定指示回波路径的频率响应的估计的回波路径模型; 使用所述回波路径模型从所述第一信号中去除所述回波分量的估计; 检测第一信号是否过载; 并且其中如果检测到所述第一信号过载，则确定回波路径模式的步骤！包括确定过载回波路径模型，使得由过载回波路径模式指示的频率响应的估计仅被允许随时间增加，而不管回波路径的频率响应是否随时间而减少。

5. 发明申请

WO2011070033A1 ENCODING AND DECODING SPEECH SIGNALS 审中-公开
标题翻译：编码和解码语音信号
公开(公告)号：WO2011070033A1
公开(公告)日：2011-06-16
申请号：PCT/EP2010/069103
申请日：2010-12-07
申请人： SKYPE LIMITED , STROMMER, Stefan , SORENSEN, Karsten , JENSEN, Soren , VOS, Koen , BERGENHEIM, Jon
发明人： STROMMER, Stefan , SORENSEN, Karsten , JENSEN, Soren , VOS, Koen , BERGENHEIM, Jon
IPC分类号： G10L19/14 , G10L21/02
CPC分类号： G10L19/26 , G10L19/24 , G10L21/0364
摘要： A method and apparatus for transmitting an audio signal over a communication channel comprising encoding the audio signal with an encoder 204 using a first sampling rate, filtering the audio signal using a first cut off frequency, the first cut off frequency being chosen in dependence upon the first sampling rate, and transmitting the encoded and filtered audio signal over the communication channel. The presence of a condition in which the sampling rate of the encoder 204 is to be switched to a second sampling rate at a switching time is determined and if the condition has been determined to be present, the cut off frequency used in the filtering step is gradually changed from the first cut off frequency to a second cut off frequency, the second cut off frequency being chosen in dependence upon the second sampling rate, such that the audio bandwidth of the transmitted signal changes gradually when the sampling rate is switched to the second sampling rate.
摘要翻译：一种用于通过通信信道发送音频信号的方法和装置，包括使用第一采样率对编码器204对音频信号进行编码，使用第一截止频率对音频信号进行滤波，第一截止频率根据第一采样率，并且通过通信信道发送编码和滤波的音频信号。确定在切换时刻将编码器204的采样率切换到第二采样率的条件的存在，如果已经确定存在条件，则在滤波步骤中使用的截止频率为从第一截止频率逐渐变化到第二截止频率，根据第二采样率选择第二截止频率，使得当采样速率切换到第二截止频率时，发送信号的音频带宽逐渐变化采样率。

6. 发明申请

WO2011057971A1 NOISE SUPPRESSION 审中-公开
标题翻译：噪声抑制
公开(公告)号：WO2011057971A1
公开(公告)日：2011-05-19
申请号：PCT/EP2010/066947
申请日：2010-11-05
申请人： SKYPE LIMITED , SORENSEN, Karsten , BERGENHEIM, Jon , VOS, Koen
发明人： SORENSEN, Karsten , BERGENHEIM, Jon , VOS, Koen
IPC分类号： G10L21/02
CPC分类号： G10L19/012 , G10L21/0208
摘要： A method and computing system for suppressing noise in an audio signal, comprising: receiving the audio signal at signal processing means; determining that another signal is input to the signal processing means, the input signal resulting from an activity which generates noise in the audio signal; and selectively suppressing noise in the audio signal in dependence on the determination that the input signal is input to the signal processing means to thereby suppress the generated noise in the audio signal.
摘要翻译：一种用于抑制音频信号中的噪声的方法和计算系统，包括：在信号处理装置处接收音频信号; 确定另一信号被输入到所述信号处理装置，所述输入信号是由在所述音频信号中产生噪声的活动产生的; 并且根据输入信号被输入到信号处理装置的确定来选择性地抑制音频信号中的噪声，从而抑制音频信号中产生的噪声。

7. 发明申请

WO2011057970A1 GAIN CONTROL FOR AN AUDIO SIGNAL 审中-公开
标题翻译：音频信号增益控制
公开(公告)号：WO2011057970A1
公开(公告)日：2011-05-19
申请号：PCT/EP2010/066946
申请日：2010-11-05
申请人： SKYPE LIMITED , SORENSEN, Karsten , BERGENHEIM, Jon , VOS, Koen
发明人： SORENSEN, Karsten , BERGENHEIM, Jon , VOS, Koen
IPC分类号： H03G3/32 , G10L21/02
CPC分类号： H03G3/32 , G10L21/0208
摘要： A method and system for modifying an audio signal, the method comprising: receiving the audio signal at signal processing means; analysing the received audio signal to identify characteristic signal components in the audio signal; determining that another signal is input to the signal processing means, the input signal resulting from an activity which generates noise in the audio signal; and selectively applying an adjusted gain to the audio signal based on the determination that the input signal is input to the signal processing means, wherein the adjusted gain is generated in dependence upon the signal strength of the identified signal components.
摘要翻译：一种用于修改音频信号的方法和系统，所述方法包括：在信号处理装置处接收音频信号; 分析接收到的音频信号以识别音频信号中的特征信号分量; 确定另一信号被输入到所述信号处理装置，所述输入信号是由在所述音频信号中产生噪声的活动产生的; 以及基于所述输入信号被输入到所述信号处理装置的确定来选择性地对所述音频信号施加调整的增益，其中根据所识别的信号分量的信号强度来产生所述调整后的增益。

8. 发明申请

WO2008102207A2 METHOD OF ESTIMATING NOISE LEVELS IN A COMMUNICATION SYSTEM 审中-公开
标题翻译：在通信系统中估计噪声水平的方法
公开(公告)号：WO2008102207A2
公开(公告)日：2008-08-28
申请号：PCT/IB2007/004498
申请日：2007-12-20
申请人： SKYPE LIMITED , VOS, Koen , SORENSEN, Karsten, Vandborg , BERGENHEIM, Jon
发明人： VOS, Koen , SORENSEN, Karsten, Vandborg , BERGENHEIM, Jon
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L21/0232
摘要： A method of estimating noise in data containing voice information and noise comprising the steps of receiving the data as a sequence of input values; transforming the data by applying a first non linear mapping to the input values wherein the derivative function of the mapping decreases in magnitude as the input values increase in magnitude smoothing the transformed data; and transforming the smoothed transformed data by applying a second non linear mapping that is opposite to the first non linear mapping, to determine an estimate of the noise in the inputted data.
摘要翻译：一种在包含语音信息和噪声的数据中估计噪声的方法，包括以下步骤：接收数据作为输入值序列; 通过对输入值应用第一非线性映射来变换数据，其中映射的导数函数随着输入值在幅度上增加而平滑化变换后的数据; 以及通过应用与第一非线性映射相反的第二非线性映射来变换平滑变换的数据，以确定输入数据中噪声的估计。

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