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1. 发明授权

US08775171B2 Noise suppression 有权
标题翻译：噪声抑制
公开(公告)号：US08775171B2
公开(公告)日：2014-07-08
申请号：US12803295
申请日：2010-06-23
申请人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
发明人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
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。

2. 发明申请

US20120163612A1 Communication System 有权
标题翻译：通讯系统
公开(公告)号：US20120163612A1
公开(公告)日：2012-06-28
申请号：US13336547
申请日：2011-12-23
申请人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
发明人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
IPC分类号： H04B3/20
CPC分类号： H04M9/085
摘要： An echo component of a first signal received at an audio input device is removed. A second signal is output from an audio output device. The echo component in the first signal is the result of the second signal traversing an echo path. The characteristics of the first and second signals are compared, and if the first signal only comprises the echo, an estimate of the echo path is determined by comparing the first and second signals. The echo path estimate is applied to the first signal to determine an equalised first signal, which is is compared with the second signal to determine an estimate of the echo component. The echo component from the first signal is removed in dependence on the estimate of the echo component.
摘要翻译：去除在音频输入装置处接收的第一信号的回波分量。从音频输出装置输出第二信号。第一个信号中的回波分量是第二个信号穿过回波路径的结果。比较第一和第二信号的特性，并且如果第一信号仅包括回波，则通过比较第一和第二信号来确定回波路径的估计。将回波路径估计应用于第一信号以确定均衡的第一信号，其与第二信号进行比较以确定回波分量的估计。来自第一信号的回波分量根据回波分量的估计被去除。

3. 发明申请

US20080201137A1 Method of estimating noise levels in a communication system 有权
标题翻译：估计通信系统噪声水平的方法
公开(公告)号：US20080201137A1
公开(公告)日：2008-08-21
申请号：US12006057
申请日：2007-12-28
申请人： Koen Vos , Karsten Vandborg Sorensen , Jon Bergenheim
发明人： Koen Vos , Karsten Vandborg Sorensen , Jon Bergenheim
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 includes 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：接收数据作为输入值的序列; 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。

4. 发明授权

US08571039B2 Encoding and decoding speech signals 有权
标题翻译：编码和解码语音信号
公开(公告)号：US08571039B2
公开(公告)日：2013-10-29
申请号：US12803271
申请日：2010-06-23
申请人： Stefan Strommer , Karsten Vandborg Sorensen , Soren Skak Jensen , Koen Vos , Jon Bergenheim
发明人： Stefan Strommer , Karsten Vandborg Sorensen , Soren Skak Jensen , Koen Vos , Jon Bergenheim
IPC分类号： H04L12/56
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。

5. 发明申请

US20110112668A1 Gain control for an audio signal 有权
标题翻译：为音频信号增益控制
公开(公告)号：US20110112668A1
公开(公告)日：2011-05-12
申请号：US12803291
申请日：2010-06-23
申请人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
发明人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
IPC分类号： G06F17/00
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; 分析所接收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产生所述调整后的增益。

6. 发明授权

US08838444B2 Method of estimating noise levels in a communication system 有权
标题翻译：估计通信系统噪声水平的方法
公开(公告)号：US08838444B2
公开(公告)日：2014-09-16
申请号：US12006057
申请日：2007-12-28
申请人： Koen Vos , Karsten Vandborg Sorensen , Jon Bergenheim
发明人： Koen Vos , Karsten Vandborg Sorensen , Jon Bergenheim
IPC分类号： G10L21/00 , G10L21/02 , G10L15/00 , G10L15/20 , G10L21/0208 , G10L21/0232
CPC分类号： G10L21/0208 , G10L21/0232
摘要： A method of estimating noise in data containing voice information and noise includes 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：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。

7. 发明申请

US20120295562A1 Processing Audio Signals 有权
标题翻译：处理音频信号
公开(公告)号：US20120295562A1
公开(公告)日：2012-11-22
申请号：US13112529
申请日：2011-05-20
申请人： Karsten Vandborg Sorensen , Koen Vos , Jon Bergenheim
发明人： Karsten Vandborg Sorensen , Koen Vos , Jon Bergenheim
IPC分类号： H04W88/00 , H04B17/00 , H04B1/04
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该音频信号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。

8. 发明申请

US20090185515A1 Communication system 有权
标题翻译：通讯系统
公开(公告)号：US20090185515A1
公开(公告)日：2009-07-23
申请号：US12070719
申请日：2008-02-20
申请人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
发明人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
IPC分类号： H04B7/00
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 model comprises determining an overload echo path model such that the estimate of the frequency response indicated by the overload echo path model 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第一信号过载，则确定回波路径模型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型指示的频率响应的估计仅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。

9. 发明授权

US09450555B2 Gain control for an audio signal 有权
标题翻译：为音频信号增益控制
公开(公告)号：US09450555B2
公开(公告)日：2016-09-20
申请号：US12803291
申请日：2010-06-23
申请人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
发明人： Karsten Vandborg Sorensen , Jon Bergenheim , Koen Vos
IPC分类号： G10L21/0208 , H03G3/32
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; 分析所接收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产生所述调整后的增益。

10. 发明申请

US20110137660A1 Encoding and decoding speech signals 有权
标题翻译：编码和解码语音信号
公开(公告)号：US20110137660A1
公开(公告)日：2011-06-09
申请号：US12803271
申请日：2010-06-23
申请人： Stefan Strommer , Karsten Vandborg Sorensen , Soren Skak Jensen , Koen Vos , Jon Bergenheim
发明人： Stefan Strommer , Karsten Vandborg Sorensen , Soren Skak Jensen , Koen Vos , Jon Bergenheim
IPC分类号： G10L21/00
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。

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