公开(公告)号：US08983092B2

公开(公告)日：2015-03-17

申请号：US13183288

申请日：2011-07-14

Applicant: Trausti Thormundsson ,  Govind Kannan ,  Shlomi I. Regev ,  James W. Wihardja ,  Yair Kerner ,  Harry K. Lau ,  Ragnar H. Jonsson

Inventor： Trausti Thormundsson ,  Govind Kannan ,  Shlomi I. Regev ,  James W. Wihardja ,  Yair Kerner ,  Harry K. Lau ,  Ragnar H. Jonsson

IPC: H03G7/00

CPC classification number: H03G7/007

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20130195277A1

公开(公告)日：2013-08-01

申请号：US13752058

申请日：2013-01-28

Applicant: Govind Kannan ,  Harry K. Lau ,  Trausti Thormundsson ,  Ragnar H. Jonsson

Inventor： Govind Kannan ,  Harry K. Lau ,  Trausti Thormundsson ,  Ragnar H. Jonsson

IPC: H04R1/32

CPC classification number: H04R1/32 ,  H04R3/04 ,  H04R29/001 ,  H04R2430/03

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20120106750A1

公开(公告)日：2012-05-03

申请号：US13184231

申请日：2011-07-15

Applicant: Trausti Thormundsson ,  Shlomi I. Regev ,  Govind Kannan ,  Harry K. Lau ,  James W. Wihardja ,  Ragnar H. Jonsson

Inventor： Trausti Thormundsson ,  Shlomi I. Regev ,  Govind Kannan ,  Harry K. Lau ,  James W. Wihardja ,  Ragnar H. Jonsson

IPC: G10K11/16

CPC classification number: H04R3/007 ,  H04R29/003 ,  H04R2499/11

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20120016501A1

公开(公告)日：2012-01-19

申请号：US13183288

申请日：2011-07-14

Applicant: Trausti Thormundsson ,  Govind Kannan ,  Shlomi I. Regev ,  James W. Wihardja ,  Yair Kerner ,  Harry K. Lau ,  Ragnar H. Jonsson

Inventor： Trausti Thormundsson ,  Govind Kannan ,  Shlomi I. Regev ,  James W. Wihardja ,  Yair Kerner ,  Harry K. Lau ,  Ragnar H. Jonsson

IPC: G06F17/00

CPC classification number: H03G7/007

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20130230180A1

公开(公告)日：2013-09-05

申请号：US13783074

申请日：2013-03-01

Applicant: Trausti Thormundsson ,  Ragnar H. Jonsson ,  Youhong Lu ,  Govind Kannan ,  Sverrir Olafsson

Inventor： Trausti Thormundsson ,  Ragnar H. Jonsson ,  Youhong Lu ,  Govind Kannan ,  Sverrir Olafsson

IPC: H04R29/00

CPC classification number: H04R29/00 ,  G01S15/025 ,  G01S15/526 ,  H04R2499/13 ,  H04S7/00 ,  H04S2400/13

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US09060217B2

公开(公告)日：2015-06-16

申请号：US13184231

申请日：2011-07-15

Applicant: Trausti Thormundsson ,  Shlomi I. Regev ,  Govind Kannan ,  Harry K. Lau ,  James W. Wihardja ,  Ragnar H. Jonsson

Inventor： Trausti Thormundsson ,  Shlomi I. Regev ,  Govind Kannan ,  Harry K. Lau ,  James W. Wihardja ,  Ragnar H. Jonsson

IPC: G10K11/16 ,  H04R3/00 ,  H04R29/00

CPC classification number: H04R3/007 ,  H04R29/003 ,  H04R2499/11

Abstract: 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.

Abstract translation: 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。