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1. 发明申请

WO2008058692A1 LOSSLESS ENCODING AND DECODING OF DIGITAL DATA 审中-公开
标题翻译：无线编码和解码数字数据
公开(公告)号：WO2008058692A1
公开(公告)日：2008-05-22
申请号：PCT/EP2007/009764
申请日：2007-11-12
申请人： GLOBAL IP SOLUTIONS (GIPS) AB , GLOBAL IP SOLUTIONS, INC. , SKOGLUND, Jan , VOS, Koen
发明人： SKOGLUND, Jan , VOS, Koen
IPC分类号： H03M7/40
CPC分类号： H03M7/4006
摘要： The disclosure relates to encoding and decoding of digital data, and in particular to lossless arithmetic encoding and decoding of digital data representing audio, image or video data. A probability density function used for lossless arithmetic encoding of digital data is controlled by employing one or more parameters that changes over the set of data to be encoded. A parametric model in the form of an envelope function describes the spread of quantization indices derived from the data in a transform domain. By transmitting the one or more parameters together with the arithmetically encoded data, a receiving decoder may decode the data by exploiting the same parametric model as used by the encoder.
摘要翻译：本公开涉及数字数据的编码和解码，特别是涉及表示音频，图像或视频数据的数字数据的无损算术编码和解码。用于数字数据的无损算术编码的概率密度函数通过采用改变要编码的数据集的一个或多个参数来控制。以包络函数形式的参数模型描述了从变换域中的数据导出的量化索引的扩展。通过将一个或多个参数与算术编码数据一起发送，接收解码器可以通过利用由编码器使用的相同参数模型对数据进行解码。

2. 发明申请

WO2012146658A1 PROCESSING STEREOPHONIC AUDIO SIGNALS 审中-公开
标题翻译：处理立体声音频信号
公开(公告)号：WO2012146658A1
公开(公告)日：2012-11-01
申请号：PCT/EP2012/057653
申请日：2012-04-26
申请人： SKYPE , VOS, Koen
发明人： VOS, Koen
IPC分类号： H04S1/00 , G10L19/00
CPC分类号： G10L19/008 , H04S1/00
摘要： Method, apparatus and computer program product for processing an input stereophonic audio signal to thereby generate a converted stereophonic audio signal representing the input stereophonic audio signal, the input stereophonic audio signal comprising a left input audio signal and a right input audio signal, and the converted stereophonic audio signal comprising a first converted audio signal and a second converted audio signal. The first converted audio signal is generated based on the sum of the left input audio signal and the right input audio signal. The second converted audio signal is generated based on the difference between a first function of the left input audio signal and a second function of the right input audio signal. The first and second functions are adjustable to thereby adjust at least one characteristic of the converted stereophonic audio signal.
摘要翻译：用于处理输入立体声音频信号从而产生表示输入的立体声音频信号的转换的立体声音频信号的方法，装置和计算机程序产品，输入的立体声音频信号包括左输入音频信号和右输入音频信号，立体声音频信号包括第一转换音频信号和第二转换音频信号。基于左输入音频信号和右输入音频信号之和产生第一转换音频信号。第二转换音频信号基于左输入音频信号的第一功能和右输入音频信号的第二功能之间的差产生。第一和第二功能是可调节的，从而调整转换的立体声音频信号的至少一个特性。

3. 发明申请

WO2008110867A2 A COMMUNICATION SYSTEM 审中-公开
标题翻译：通信系统
公开(公告)号：WO2008110867A2
公开(公告)日：2008-09-18
申请号：PCT/IB2007/004442
申请日：2007-12-20
申请人： SKYPE LIMITED , VOS, Koen
发明人： VOS, Koen
CPC分类号： H03H17/0219 , H03H17/025 , H03H17/0294 , H03H17/04
摘要： A method for reducing ringing in a signal output from a filter comprising inputting a signal into a filter; filtering a first portion of the input signal to generate a filtered portion of the output signal; analyzing the filtered portion of the output signal; detecting if ringing is present in the filtered portion of the output signal based on said analysis; and adjusting the filter characteristics to reduce ringing in a subsequent filtered portion of the output signal if it is determined that ringing is present.
摘要翻译：一种用于减少从滤波器输出的信号中的振铃的方法，包括将信号输入到滤波器中; 过滤输入信号的第一部分以产生输出信号的滤波部分; 分析输出信号的滤波部分; 基于所述分析，检测所述输出信号的滤波部分中是否存在振铃; 以及如果确定存在振铃，则调整滤波器特性以减少输出信号的后续滤波部分中的振铃。

4. 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。

5. 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。

6. 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。

7. 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。

8. 发明申请

WO2012089671A1 DYNAMICAL ADAPTATION OF DATA ENCODING DEPENDENT ON CPU LOAD 审中-公开
标题翻译：数据编码依赖于CPU负载的动态适应
公开(公告)号：WO2012089671A1
公开(公告)日：2012-07-05
申请号：PCT/EP2011/073972
申请日：2011-12-23
申请人： SKYPE , ASTROM, Henrik , SORENSEN, Karsten , VOS, Koen
发明人： ASTROM, Henrik , SORENSEN, Karsten , VOS, Koen
IPC分类号： H04M1/253 , H04N21/442 , H04N7/26
CPC分类号： H04M1/2535 , H04L65/60 , H04N21/233 , H04N21/442 , H04N21/6379 , H04N2007/145
摘要： Method, user terminal (104), communication system (100) and computer program product for processing audio data for transmission over a network (106) in a communication session between the user terminal (104) and a further user terminal (114). Samples of audio data which have a sampling frequency and which provide a digital representation of an analogue audio signal are transmitted to the further user terminal (114) in the communication session. During the communication session, an estimate of processing resources available for processing audio data in the communication session is repeatedly determined (S604), and the sampling frequency is dynamically adjusted during the communication session based on the determined estimate of available processing resources (S606).
摘要翻译：用于在用户终端（104）与用户终端（104）之间的通信会话中处理音频数据以通过网络（106）传输的方法，用户终端（104），通信系统（100）和计算机程序产品进一步的用户终端（114）。具有采样频率并且提供模拟音频信号的数字表示的音频数据的样本在通信会话中被发送到另一个用户终端（114）。在通信会话期间，重复确定可用于处理通信会话中的音频数据的处理资源的估计（S604），并且基于所确定的可用处理资源的估计在通信会话期间动态地调整采样频率（S606）。

9. 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。

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