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1. 发明申请

US20110170683A1 Systems and Methods for Echo Cancellation and Echo Suppression 失效
标题翻译：回波消除和回波抑制的系统和方法
公开(公告)号：US20110170683A1
公开(公告)日：2011-07-14
申请号：US12684829
申请日：2010-01-08
申请人： Youhong Lu , Trausti Thormundsson , Yair Kerner , Ragnar H. Jonsson
发明人： Youhong Lu , Trausti Thormundsson , Yair Kerner , Ragnar H. Jonsson
IPC分类号： H04M9/08
CPC分类号： H04M3/002 , H04M9/082
摘要： Traditionally, echo cancellation has employed linear adaptive filters to cancel echoes in a two way communication system. The rate of adaptation is often dynamic and varies over time. Disclosed are novel rates of adaptation that perform well in the presence of background noise, during double talk and with echo path changes. Additionally, the echo or residual echo can further be suppressed with non-linear processing performed using joint frequency-time domain processing.
摘要翻译：传统上，回波消除采用线性自适应滤波器来消除双向通信系统中的回波。适应率通常是动态的，随时间而变化。公开了在双重通话期间和具有回波路径改变的情况下，在背景噪声的存在下表现良好的适应性适应性。此外，通过使用联合频域处理执行的非线性处理，可进一步抑制回波或残留回波。

2. 发明授权

US08634569B2 Systems and methods for echo cancellation and echo suppression 失效
标题翻译：用于回波消除和回波抑制的系统和方法
公开(公告)号：US08634569B2
公开(公告)日：2014-01-21
申请号：US12684829
申请日：2010-01-08
申请人： Youhong Lu , Trausti Thormundsson , Yair Kerner , Ragnar H. Jonsson
发明人： Youhong Lu , Trausti Thormundsson , Yair Kerner , Ragnar H. Jonsson
IPC分类号： H04B3/20
CPC分类号： H04M3/002 , H04M9/082
摘要： Traditionally, echo cancellation has employed linear adaptive filters to cancel echoes in a two way communication system. The rate of adaptation is often dynamic and varies over time. Disclosed are novel rates of adaptation that perform well in the presence of background noise, during double talk and with echo path changes. Additionally, the echo or residual echo can further be suppressed with non-linear processing performed using joint frequency-time domain processing.
摘要翻译：传统上，回波消除采用线性自适应滤波器来消除双向通信系统中的回波。适应率通常是动态的，随时间而变化。公开了在双重通话期间和具有回波路径改变的情况下，在背景噪声的存在下表现良好的适应性适应性。此外，通过使用联合频域处理执行的非线性处理，可进一步抑制回波或残留回波。

3. 发明申请

US20120016501A1 WAVEFORM SHAPING SYSTEM TO PREVENT ELECTRICAL AND MECHANICAL SATURATION IN LOUD SPEAKERS 有权
标题翻译：波形成形系统，以防止扬声器中的电气和机械饱和度
公开(公告)号：US20120016501A1
公开(公告)日：2012-01-19
申请号：US13183288
申请日：2011-07-14
申请人： Trausti Thormundsson , Govind Kannan , Shlomi I. Regev , James W. Wihardja , Yair Kerner , Harry K. Lau , Ragnar H. Jonsson
发明人： Trausti Thormundsson , Govind Kannan , Shlomi I. Regev , James W. Wihardja , Yair Kerner , Harry K. Lau , Ragnar H. Jonsson
IPC分类号： G06F17/00
CPC分类号： H03G7/007
摘要： Peak reduction and power limitations are used to prevent distortion and protect components. In a cellular telephone, peak reduction can be based on battery power level to prevent electrical distortion from saturation. In addition peak reduction can be used to prevent mechanical distortion such as rub and buzz. Dynamic range compression can be used for peak reduction. In another application dynamic range compression can be used to control the power output to protect a speaker from damage. One example of a dynamic range compressor/peak limiter comprises a look-ahead buffer and an analysis engine. For example, the look-ahead buffer holds a window of samples of a signal. The analysis engine selects a gain envelope function on the basis of the samples, for example, by selecting the Pth sample in the buffer whenever that sample exceeds a given threshold.
摘要翻译：峰值降低和功率限制用于防止失真并保护组件。在蜂窝电话中，峰值降低可以基于电池功率电平，以防止电气失真饱和。此外，还可以使用峰值降低来防止机械变形，例如摩擦和嗡嗡声。动态范围压缩可用于降低峰值。在另一个应用中，可以使用动态范围压缩来控制功率输出，以保护扬声器免受损坏。动态范围压缩器/峰值限制器的一个示例包括预先提前缓冲器和分析引擎。例如，先行缓冲器保存信号样本的窗口。分析引擎基于样本选择增益包络函数，例如，每当该样本超过给定阈值时，通过选择缓冲器中的第P个样本。

4. 发明授权

US08983092B2 Waveform shaping system to prevent electrical and mechanical saturation in loud speakers 有权
标题翻译：波形整形系统可防止扬声器中的电气和机械饱和
公开(公告)号：US08983092B2
公开(公告)日：2015-03-17
申请号：US13183288
申请日：2011-07-14
申请人： Trausti Thormundsson , Govind Kannan , Shlomi I. Regev , James W. Wihardja , Yair Kerner , Harry K. Lau , Ragnar H. Jonsson
发明人： Trausti Thormundsson , Govind Kannan , Shlomi I. Regev , James W. Wihardja , Yair Kerner , Harry K. Lau , Ragnar H. Jonsson
IPC分类号： H03G7/00
CPC分类号： H03G7/007
摘要： Peak reduction and power limitations are used to prevent distortion and protect components. In a cellular telephone, peak reduction can be based on battery power level to prevent electrical distortion from saturation. In addition peak reduction can be used to prevent mechanical distortion such as rub and buzz. Dynamic range compression can be used for peak reduction. In another application dynamic range compression can be used to control the power output to protect a speaker from damage. One example of a dynamic range compressor/peak limiter comprises a look-ahead buffer and an analysis engine. For example, the look-ahead buffer holds a window of samples of a signal. The analysis engine selects a gain envelope function on the basis of the samples, for example, by selecting the Pth sample in the buffer whenever that sample exceeds a given threshold.
摘要翻译：峰值降低和功率限制用于防止失真并保护组件。在蜂窝电话中，峰值降低可以基于电池功率电平，以防止电气失真饱和。此外，还可以使用峰值降低来防止机械变形，例如摩擦和嗡嗡声。动态范围压缩可用于降低峰值。在另一个应用中，可以使用动态范围压缩来控制功率输出，以保护扬声器免受损坏。动态范围压缩器/峰值限制器的一个示例包括预先提前缓冲器和分析引擎。例如，先行缓冲器保存信号样本的窗口。分析引擎基于样本选择增益包络函数，例如，每当该样本超过给定阈值时，通过选择缓冲器中的第P个样本。

5. 发明申请

US20130230180A1 INTEGRATED MOTION DETECTION USING CHANGES IN ACOUSTIC ECHO PATH 有权
标题翻译：综合运动检测使用变化的声音ECHO路径
公开(公告)号：US20130230180A1
公开(公告)日：2013-09-05
申请号：US13783074
申请日：2013-03-01
申请人： Trausti Thormundsson , Ragnar H. Jonsson , Youhong Lu , Govind Kannan , Sverrir Olafsson
发明人： Trausti Thormundsson , Ragnar H. Jonsson , Youhong Lu , Govind Kannan , Sverrir Olafsson
IPC分类号： H04R29/00
CPC分类号： H04R29/00 , G01S15/025 , G01S15/526 , H04R2499/13 , H04S7/00 , H04S2400/13
摘要： A system for detecting motion comprising a first speaker, a first microphone separated from the first speaker by a distance D1, a sound generator, an echo parameter measurement device and an echo parameter monitor, wherein the echo parameter monitor stores two or more sequential echo parameters and generates a motion indicator if the two or more sequential echo parameters indicate a change in an acoustic echo path that exceeds a predetermined threshold.
摘要翻译：一种用于检测运动的系统，包括第一扬声器，从第一扬声器分离距离D1的第一麦克风，声音发生器，回波参数测量装置和回波参数监视器，其中回波参数监视器存储两个或更多个顺序回波参数并且如果所述两个或更多个顺序回波参数指示声学回声路径中的变化超过预定阈值，则生成运动指示器。

6. 发明授权

US09060217B2 Audio driver system and method 有权
标题翻译：音频驱动系统和方法
公开(公告)号：US09060217B2
公开(公告)日：2015-06-16
申请号：US13184231
申请日：2011-07-15
申请人： Trausti Thormundsson , Shlomi I. Regev , Govind Kannan , Harry K. Lau , James W. Wihardja , Ragnar H. Jonsson
发明人： Trausti Thormundsson , Shlomi I. Regev , Govind Kannan , Harry K. Lau , James W. Wihardja , Ragnar H. Jonsson
IPC分类号： G10K11/16 , H04R3/00 , H04R29/00
CPC分类号： H04R3/007 , H04R29/003 , H04R2499/11
摘要： A system and apparatus for constructing a displacement model across a frequency range for a loudspeaker is disclosed. The resultant displacement model is centered around the distortion point. Once a distortion model is constructed it can be incorporated into an audio driver to prevent distortion by incorporating the model and a distortion compensation unit with a conventional audio driver. Various topologies can be used to incorporate a distortion model and distortion compensation unit into an audio driver. Furthermore, a wide variety of distortion compensation techniques can be employed to avoid distortion in such an audio driver.
摘要翻译：公开了一种用于在扬声器的频率范围内构造位移模型的系统和装置。所得到的位移模型围绕失真点居中。一旦构造了失真模型，它可以被并入到音频驱动器中，以通过将模型和具有常规音频驱动器的失真补偿单元结合在一起来防止失真。可以使用各种拓扑结构将失真模型和失真补偿单元并入到音频驱动器中。此外，可以采用各种失真补偿技术来避免这种音频驱动器中的失真。

7. 发明申请

US20100321216A1 Systems and Methods for Variable Rate Conversion 有权
标题翻译：可变汇率转换的系统和方法
公开(公告)号：US20100321216A1
公开(公告)日：2010-12-23
申请号：US12488322
申请日：2009-06-19
申请人： Ragnar H. Jonsson , Vilhjalmur S. Thorvaldsson , Trausti Thormundsson
发明人： Ragnar H. Jonsson , Vilhjalmur S. Thorvaldsson , Trausti Thormundsson
IPC分类号： H03M7/00 , H04L27/06 , H04L7/00
CPC分类号： H03M5/02 , H03H17/0275 , H03H17/0642 , H03H17/0685
摘要： Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.
摘要翻译：多相滤波器用于提供高效且低复杂度的速率转换解决方案。但是，它们不灵活，不容易重新配置。用于速率转换器的新颖设计采用多相滤波器，但是利用滤波器系数之间的内插来增加速率转换的灵活性。该插值可以实现为多相滤波器结果的内插。可以进行额外的近似以进一步减少实现灵活的速率转换器所需的计算量。

8. 发明授权

US09160864B2 Systems and methods for stereo echo cancellation 有权
标题翻译：用于立体声回波消除的系统和方法
公开(公告)号：US09160864B2
公开(公告)日：2015-10-13
申请号：US13344510
申请日：2012-01-05
申请人： Ragnar H. Jonsson , Sverrir Olafsson , Trausti Thormundsson
发明人： Ragnar H. Jonsson , Sverrir Olafsson , Trausti Thormundsson
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Acoustic echoes in communications systems are distracting and undesirable. Acoustic echoes occur in communications systems where sound produced by a speaker is picked up by a microphone in a communications system. In a stereo playback environment, echo cancellation techniques become more complicated. Echo cancellation can be performed by performing echo cancellation on a center signal, which is the sum of a left channel signal and the right channel signal, or left signal and a difference signal, which is the difference of the right channel signal and the left channel signal. The adaptation rates of the two echo cancellers meet certain constraints to prevent degeneracies in the echo cancellation system.
摘要翻译：通信系统中的声学回声分散注意力和不良影响。声学回声发生在通信系统中，其中扬声器产生的声音由通信系统中的麦克风拾取。在立体声播放环境中，回声消除技术变得更加复杂。可以通过对作为左声道信号和右声道信号或左声道信号的和的中心信号进行回波消除来进行回波消除，和作为右声道信号与左声道的差的差分信号信号。两个回波消除器的适应率满足某些限制，以防止回波消除系统中的退化。

9. 发明申请

US20130195277A1 SYSTEM AND METHOD FOR DYNAMIC RANGE COMPENSATION OF DISTORTION 有权
标题翻译：动态范围补偿的系统与方法
公开(公告)号：US20130195277A1
公开(公告)日：2013-08-01
申请号：US13752058
申请日：2013-01-28
申请人： Govind Kannan , Harry K. Lau , Trausti Thormundsson , Ragnar H. Jonsson
发明人： Govind Kannan , Harry K. Lau , Trausti Thormundsson , Ragnar H. Jonsson
IPC分类号： H04R1/32
CPC分类号： H04R1/32 , H04R3/04 , H04R29/001 , H04R2430/03
摘要： A system for controlling distortion comprising a total harmonic distortion (THD) modeling system configured to apply a chirp signal to a system and to identify one or more frequency bands at which distortion is present, and to apply a ramping signal to identify for each of the one or more frequency bands an input signal level at which distortion is initiated, a signal processing system configured to receive an input signal, to determine whether frequency components are present in the input signal that are associated with the one or more frequency bands at which distortion is present, and to limit the amplitude of the input signal at the one or more frequency bands, such as by applying dynamic range compensation.
摘要翻译：一种用于控制失真的系统，包括总谐波失真（THD）建模系统，其被配置为将啁啾信号施加到系统并且识别存在失真的一个或多个频带，并且应用斜坡信号来识别每个一个或多个频带是发生失真的输入信号电平，被配置为接收输入信号的信号处理系统，以确定频率分量是否存在于与一个或多个频带相关联的输入信号中，在该失真存在，并且通过应用动态范围补偿来限制在一个或多个频带处的输入信号的幅度。

10. 发明授权

US08477394B2 Systems and methods for color defringing 有权
标题翻译：降色系统和方法
公开(公告)号：US08477394B2
公开(公告)日：2013-07-02
申请号：US12851343
申请日：2010-08-05
申请人： Ragnar H. Jonsson , Derek T. Walton , Trausti Thormundsson
发明人： Ragnar H. Jonsson , Derek T. Walton , Trausti Thormundsson
IPC分类号： H04N1/23 , H04N1/46 , H04N1/387 , G06K9/40
CPC分类号： H04N1/486
摘要： A system and method for defringing chromatic aberrations that occur in imaging devices such as scanners. The system comprises shift filters to shift lines in the various color planes together. In addition in each color plane, a spread filter is used to compensate for the unequal point spread functions of each color. Furthermore, the results can be enhanced by filtering in the luminance-chrominance space.
摘要翻译：一种用于降低诸如扫描仪的成像装置中出现的色差的系统和方法。该系统包括移位滤波器以将各种颜色平面中的线移动到一起。另外在每个颜色平面中，扩展滤波器用于补偿每种颜色的不等点扩散函数。此外，可以通过在亮度 - 色度空间中进行滤波来增强结果。

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