公开(公告)号：US08848935B1

公开(公告)日：2014-09-30

申请号：US12950431

申请日：2010-11-19

申请人： Dana Massie ,  Jean Laroche

发明人： Dana Massie ,  Jean Laroche

IPC分类号： A61F11/06

CPC分类号： H04R1/1083 ,  A61F11/14 ,  A61F2011/145 ,  H04R2201/107 ,  H04R2460/01

摘要： Systems and methods described herein provide for low latency active noise cancellation which alleviate the problems associated with analog filter circuitry. The present technology utilizes low latency digital signal processing techniques which overcome the high latency conventionally associated with conversion between the analog and digital domains. As a result, low latency active noise cancellation is performed utilizing digital filter circuitry which is not subject to the inaccuracies and drift of analog filter components. In doing so, the present technology provides robust, high quality active noise cancellation.

摘要翻译： 这里描述的系统和方法提供了低延迟有源噪声消除，其减轻了与模拟滤波器电路相关的问题。 本技术利用低延迟数字信号处理技术，其克服了常规地与模拟和数字域之间的转换相关联的高等待时间。 因此，使用不受模拟滤波器组件的不准确和漂移的数字滤波器电路来执行低延迟有源噪声消除。 这样做，本技术提供了强大的，高质量的主动噪声消除。

公开(公告)号：US08618961B1

公开(公告)日：2013-12-31

申请号：US13797344

申请日：2013-03-12

申请人： Dana Massie ,  David P. Rossum ,  Brian Clark ,  Leonardo Rub ,  Jean Laroche

发明人： Dana Massie ,  David P. Rossum ,  Brian Clark ,  Leonardo Rub ,  Jean Laroche

IPC分类号： H03M7/00

CPC分类号： H03H17/0422 ,  H03H17/0202 ,  H03H17/0294 ,  H03H17/04

摘要： Digital methods and systems for signal processing and filtering are provided. The methods and corresponding systems provide asynchronous conversion of sampling rate frequencies and utilize advanced multistage phasor filters for converting an input signal having a first sampling rate into an output signal sampled in an arbitrary sequence of sampling times. The conversion process provides a sequence of sets of complex numbers representing a filtered version of the input signal. More specifically, the conversion process includes the calculation of values of the output signal by multiplying (e.g., scaling) the sets of complex numbers by a corresponding set of complex phasors, the complex phasors corresponding to the timing of the arbitrary time sequence to obtain a corresponding set of real results with the value of the output signal being the sum of the real results.

摘要翻译： 提供了用于信号处理和滤波的数字方法和系统。 方法和相应的系统提供采样率频率的异步转换，并利用先进的多级相量滤波器将具有第一采样率的输入信号转换为以任意采样次序采样的输出信号。 转换过程提供表示输入信号的滤波版本的一组复数序列。 更具体地，转换处理包括通过将复数集合乘以（例如，缩放）相应的复相量集合来计算输出信号的值，复数相量与任意时间序列的定时相对应以获得 实际结果的对应集合，输出信号的值为真实结果的总和。

公开(公告)号：US08787587B1

公开(公告)日：2014-07-22

申请号：US13529809

申请日：2012-06-21

申请人： Carlo Murgia ,  Michael M. Goodwin ,  Peter Santos ,  Dana Massie

发明人： Carlo Murgia ,  Michael M. Goodwin ,  Peter Santos ,  Dana Massie

IPC分类号： A61F11/06

CPC分类号： H04R3/005 ,  H04R2430/20 ,  H04R2499/11

摘要： An audio processing system processes an audio signal that may come from one or more microphones. The audio processing system may use information from one or more non-acoustic sensors to improve a variety of system characteristics, including responsiveness and quality. Those audio processing systems that use spatial information, for example to separate multiple audio sources, are undesirably susceptible to changes in the relative position of any audio sources, the audio processing system itself, or any combination thereof. Using the non-acoustic sensor information may decrease this susceptibility advantageously in an audio processing system.

摘要翻译： 音频处理系统处理可能来自一个或多个麦克风的音频信号。 音频处理系统可以使用来自一个或多个非声学传感器的信息来改善各种系统特性，包括响应性和质量。 使用空间信息（例如分离多个音频源）的那些音频处理系统不利地容易受到任何音频源，音频处理系统本身或其任何组合的相对位置的改变的影响。 使用非声学传感器信息可以有利地在音频处理系统中减小该磁化率。

公开(公告)号：US08712069B1

公开(公告)日：2014-04-29

申请号：US12843819

申请日：2010-07-26

申请人： Carlo Murgia ,  Michael M. Goodwin ,  Peter Santos ,  Dana Massie

发明人： Carlo Murgia ,  Michael M. Goodwin ,  Peter Santos ,  Dana Massie

IPC分类号： A61F11/06

CPC分类号： H04R3/005 ,  H04R2430/20 ,  H04R2499/11

摘要： An audio processing system processes an audio signal that may come from one or more microphones. The audio processing system may use information from one or more non-acoustic sensors to improve a variety of system characteristics, including responsiveness and quality. Especially those audio processing systems that use spatial information, for example to separate multiple audio sources, are undesirably susceptible to changes in the relative position of any audio sources, the audio processing system itself, or any combination thereof. Using the non-acoustic sensor information may decrease this susceptibility advantageously in an audio processing system.

摘要翻译： 音频处理系统处理可能来自一个或多个麦克风的音频信号。 音频处理系统可以使用来自一个或多个非声学传感器的信息来改善各种系统特性，包括响应性和质量。 特别是使用空间信息（例如分离多个音频源）的那些音频处理系统不利地容易受到任何音频源，音频处理系统本身或其任何组合的相对位置的变化的影响。 使用非声学传感器信息可以有利地在音频处理系统中减小该磁化率。

公开(公告)号：US08700391B1

公开(公告)日：2014-04-15

申请号：US12895254

申请日：2010-09-30

申请人： Carlos Avendano ,  Carlo Murgia ,  Dana Massie

发明人： Carlos Avendano ,  Carlo Murgia ,  Dana Massie

IPC分类号： G10L21/02

CPC分类号： G10L21/0388 ,  G10L25/18

摘要： Audio signal bandwidth expansion is performed on a narrow bandwidth signal received from a far end source. The far end source may transmit the signal over the audio communication network. The narrow band signal bandwidth is expanded such that the bandwidth exceeds that of the audio communication network. The signal may be expanded by performing frequency folding on the signal. One or more features are determined for the narrow bandwidth signal, and the expanded signal is modified based on a feature. The feature may be signal band energy slope, narrow band signal energy, or some other feature. The modification may be performed by a shelf filter selected based on the feature. The modified signals are provided for additional processing. In some embodiments, a noise component is added to the narrow band signal prior to folding to create an excitation that reduces the appearance of a fully harmonic signal characteristic.

摘要翻译： 在从远端源接收的窄带宽信号上执行音频信号带宽扩展。 远端源可以通过音频通信网络发送信号。 窄带信号带宽被扩展，使得带宽超过音频通信网络的带宽。 可以通过对信号执行频率折叠来扩展信号。 针对窄带宽信号确定一个或多个特征，并且基于特征修改扩展信号。 该特征可以是信号带能量斜率，窄带信号能量或一些其他特征。 修改可以由基于特征选择的货架过滤器来执行。 修改的信号被提供用于附加处理。 在一些实施例中，在折叠之前将噪声分量添加到窄带信号以产生减少完全谐波信号特征的出现的激励。

公开(公告)号：US08405532B1

公开(公告)日：2013-03-26

申请号：US12790552

申请日：2010-05-28

申请人： Brian Clark ,  Dana Massie

发明人： Brian Clark ,  Dana Massie

IPC分类号： H03M7/00

CPC分类号： H03H17/0275 ,  G10L21/00 ,  H03H17/0628

摘要： Systems and methods for asynchronous sample rate conversion are provided that allow time-varying arbitrary sample ratios. An uncorrected ratio between two arbitrary sample rates is corrected and subsequently used to perform an efficient sample rate conversion on the samples in a data stream. Coefficients of a (polyphase) finite impulse response filter are interpolated based on a current time register value. Additional computational efficiency (and a smaller finite impulse response filter) may be used due to oversampling the input signal to the finite impulse response filter.

摘要翻译： 提供用于异步采样率转换的系统和方法，其允许时变任意采样比。 校正两个任意采样率之间的未校正比率，随后用于对数据流中的样本执行有效的采样率转换。 （多相）有限脉冲响应滤波器的系数基于当前时间寄存器值进行内插。 由于对有限脉冲响应滤波器的输入信号过采样，可以使用额外的计算效率（和较小的有限脉冲响应滤波器）。

公开(公告)号：US06978027B1

公开(公告)日：2005-12-20

申请号：US09547365

申请日：2000-04-11

申请人： Luke Dahl ,  Jean-Marc Jot ,  Vincent Vu ,  Dana Massie

发明人： Luke Dahl ,  Jean-Marc Jot ,  Vincent Vu ,  Dana Massie

IPC分类号： G10K15/12 ,  H03G3/00 ,  H03G3/20

CPC分类号： G10K15/12

摘要： An improved reverberation processor includes a technique for changing environmental parameters without causing disturbing audio artifacts. The technique includes the steps of sequentially changing the read pointers of different delay lines. Additionally, for each delay line a level control variable is ramped down prior to changing the read pointer and then ramped back up. The reverberation processor also provides means for producing and controlling a repeating echo in the reverberation decay, as well as adjusting the diffusion (or echo density) of the reverberation.

摘要翻译： 改进的混响处理器包括用于改变环境参数而不引起干扰的音频伪影的技术。 该技术包括顺序地改变不同延迟线的读指针的步骤。 此外，对于每个延迟线，在更改读指针之前，电平控制变量被斜降，然后斜升。 混响处理器还提供用于在混响衰减中产生和控制重复回波的装置，以及调整混响的扩散（或回声密度）。

公开(公告)号：US09104510B1

公开(公告)日：2015-08-11

申请号：US12772146

申请日：2010-04-30

申请人： Leonardo Rub ,  Dana Massie ,  Samuel Dicker

发明人： Leonardo Rub ,  Dana Massie ,  Samuel Dicker

IPC分类号： G06F7/38 ,  G06F7/544

CPC分类号： G06F7/5443 ,  G06F7/483

摘要： Arithmetic units and methods for floating point processing are provided. In exemplary embodiments, data paths to and from multiple multipliers and adders are flexibly combined through crossbars and alignment units to allow a wide range of mathematical operations, including affine and SIMD operations. The micro-architecture for a high-performance flexible vector floating point arithmetic unit is provided, which can perform a single-cycle throughput complex multiply-and-accumulate operation, as well as a Fast Fourier Transform (radix-2 decimation-in-time) Butterfly operation.

摘要翻译： 提供了用于浮点处理的算术单元和方法。 在示例性实施例中，到多个乘法器和加法器的数据路径通过交叉和对准单元灵活地组合，以允许广泛的数学运算，包括仿射和SIMD操作。 提供了一种用于高性能灵活向量浮点算术单元的微架构，可以执行单周期吞吐量复乘和累加运算，以及快速傅立叶变换（基2次抽取时间） ）蝴蝶操作。

公开(公告)号：US08611551B1

公开(公告)日：2013-12-17

申请号：US13935847

申请日：2013-07-05

申请人： Dana Massie ,  Jean Laroche

发明人： Dana Massie ,  Jean Laroche

IPC分类号： A61F11/06

CPC分类号： G10K11/178 ,  G10K2210/1081

摘要： Systems and methods described herein provide for low latency active noise cancellation, which alleviates the problems associated with analog filter circuitry. The present technology utilizes low latency digital signal processing techniques that overcome the high latency conventionally associated with conversion between the analog and digital domains. As a result, low latency active noise cancellation is performed utilizing digital filter circuitry which is not subject to the inaccuracies and drift of analog filter components. In doing so, the present technology provides robust, high quality active noise cancellation.

公开(公告)号：US08526628B1

公开(公告)日：2013-09-03

申请号：US13493648

申请日：2012-06-11

申请人： Dana Massie ,  Jean Laroche

发明人： Dana Massie ,  Jean Laroche

IPC分类号： A61F11/06

CPC分类号： G10K11/178 ,  G10K2210/1081

摘要： Systems and methods described herein provide for low latency active noise cancellation, which alleviates the problems associated with analog filter circuitry. The present technology utilizes low latency digital signal processing techniques that overcome the high latency conventionally associated with conversion between the analog and digital domains. As a result, low latency active noise cancellation is performed utilizing digital filter circuitry which is not subject to the inaccuracies and drift of analog filter components. In doing so, the present technology provides robust, high quality active noise cancellation.

摘要翻译： 这里描述的系统和方法提供低延迟有源噪声消除，其减轻与模拟滤波器电路相关的问题。 本技术利用低延迟数字信号处理技术来克服传统上与模拟和数字域之间的转换相关联的高等待时间。 因此，使用不受模拟滤波器组件的不准确和漂移的数字滤波器电路来执行低延迟有源噪声消除。 这样做，本技术提供了强大的，高质量的主动噪声消除。