专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08386971B2 Method and apparatus for low delay recursive filter design 有权
标题翻译：低延迟递归滤波器设计方法与装置
公开(公告)号：US08386971B2
公开(公告)日：2013-02-26
申请号：US12838897
申请日：2010-07-19
申请人： Mohamed Mansour
发明人： Mohamed Mansour
IPC分类号： G06F17/50
CPC分类号： H03H17/00 , H03H2017/009
摘要： A method and apparatus for low delay recursive filter design. The method includes determining a predefined filter template with higher magnitude specification than a target filter design, determining at least one relaxation bound on the filter specification utilizing the predefined filter template, specifying at least one constraint for the target filter design utilizing the at least one relaxation bound, and determining a low delay recursive filter design for minimizing the average group delay of the filter utilizing the at least one constraint.
摘要翻译：一种用于低延迟递归滤波器设计的方法和装置。该方法包括确定具有比目标滤波器设计更高的规格规格的预定义滤波器模板，使用预定义的滤波器模板确定滤波器规范上的至少一个松弛边界，使用至少一个松弛来指定目标滤波器设计的至少一个约束并且确定低延迟递归滤波器设计，以利用至少一个约束来最小化滤波器的平均组延迟。

2. 发明申请

US20110022999A1 METHOD AND APPARATUS FOR LOW DELAY RECURSIVE FILTER DESIGN 有权
标题翻译：低延迟滤波器设计的方法与装置
公开(公告)号：US20110022999A1
公开(公告)日：2011-01-27
申请号：US12838897
申请日：2010-07-19
申请人： Mohamed Farouk Mansour
发明人： Mohamed Farouk Mansour
IPC分类号： G06F17/50
CPC分类号： H03H17/00 , H03H2017/009
摘要： A method and apparatus for low delay recursive filter design. The method includes determining a predefined filter template with higher magnitude specification than a target filter design, determining at least one relaxation bound on the filter specification utilizing the predefined filter template, specifying at least one constraint for the target filter design utilizing the at least one relaxation bound, and determining a low delay recursive filter design for minimizing the average group delay of the filter utilizing the at least one constraint.
摘要翻译：一种用于低延迟递归滤波器设计的方法和装置。该方法包括确定具有比目标滤波器设计更高的规格规格的预定义滤波器模板，使用预定义的滤波器模板确定滤波器规范上的至少一个松弛边界，使用至少一个松弛来指定目标滤波器设计的至少一个约束并且确定低延迟递归滤波器设计，以利用至少一个约束来最小化滤波器的平均组延迟。

3. 发明公开

US20240305119A1 Circuitry for Measurement of Electrochemical Cells 审中-公开
公开(公告)号：US20240305119A1
公开(公告)日：2024-09-12
申请号：US18584608
申请日：2024-02-22
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. LESSO , Yanto SURYONO , Toru IDO , Claire MOTION
IPC分类号： H02J7/00 , H03H17/00 , H03H17/02
CPC分类号： H02J7/0048 , H02J7/005 , H03H17/0289 , H03H2017/009
摘要： Circuitry for processing an output of an electrochemical cell comprising a first electrode and a second electrode, the circuitry comprising: drive circuitry configured to apply a stimulus to the first electrode; measurement circuitry configured to obtain an output signal from the output of the electrochemical cell in response to the stimulus; processing circuitry configured to: apply the stimulus to a model of the electrochemical cell; obtain a modelled output signal from the model in response to the stimulus; determine an error in the output signal based on the output signal and the modelled output signal.

4. 发明公开

US20240236609A1 METHOD OF USING IIR FILTERS FOR THE PURPOSE OF ALLOWING ONE AUDIO SOUND TO ADOPT THE SAME SPECTRAL CHARACTERISTIC OF ANOTHER AUDIO SOUND 审中-公开
公开(公告)号：US20240236609A1
公开(公告)日：2024-07-11
申请号：US18405272
申请日：2024-01-05
申请人： AUDIO IMPRESSIONS, INC.
发明人： Christopher L. Stone , Spencer Stone , Christopher Nicolas Vlavianos
IPC分类号： H04S7/00 , H03H17/00 , H03H17/02
CPC分类号： H04S7/305 , H03H17/0294 , H04S7/307 , H03H2017/009
摘要： An audio sampler is provided, comprising a sample library having stored therein a plurality of main audio samples and a plurality of infinite impulse response (IIR) coefficients divided into subset, each subset corresponding to one of the main audio samples; a sample playback engine comprising an input receiving the main audio samples and outputting a playback signal; and, an IIR filter receiving the corresponding subset of IIR coefficients and applying the IIR filter to the main audio samples or to the playback signal.

5. 发明授权

US11899517B2 Event analysis and display 有权
公开(公告)号：US11899517B2
公开(公告)日：2024-02-13
申请号：US17822023
申请日：2022-08-24
申请人： Schweitzer Engineering Laboratories, Inc.
发明人： Md Arif Khan , Gregary C. Zweigle , Jared Kyle Bestebreur
IPC分类号： G06F1/3218 , H03H17/04 , H02J13/00 , G01R25/00 , G06F3/14 , H03H17/00
CPC分类号： G06F1/3218 , G01R25/00 , G06F3/14 , H02J13/00002 , H03H17/04 , H03H2017/009
摘要： Techniques and apparatus presented herein are directed toward monitoring an electric power delivery system to detect and locate a power generation event. A power generation event may include a tripped generator, a loss of a transmission line, or other loss of power generation. To detect the event, an analysis engine may receive and monitor input data. A detection signal may be generated based on the input data. Upon detecting the event, the analysis engine may determine a source and propagation of the event through the delivery system. Based on the source and propagation of the event, the analysis engine may determine the location of the event. The analysis engine may generate an overlay with the input data to provide the location and other information about the event to a user such that remedial action can be taken to resolve the event and restore the lost power generation.

6. 发明授权

US09661190B2 Low latency and low complexity phase shift network 有权
公开(公告)号：US09661190B2
公开(公告)日：2017-05-23
申请号：US14403812
申请日：2013-05-14
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Yun Zhang
IPC分类号： H03H17/04 , H03H17/08 , H03H17/00 , H04N5/04
CPC分类号： H04N5/04 , H03H17/04 , H03H17/08 , H03H2017/009 , H03H2017/0472
摘要： A high performance, low complexity phase shift network may be created with one or more non-first-order all-pass recursive filters that are built on top of a plurality of first-order and/or second-order all-pass recursive filters and/or delay lines. A target time delay, whether large or small, may be specified as a constraint for a non-first-order all-pass recursive filter. A target phase response may be determined for the non-first-order all-pass recursive filter. Phase errors between the target phase response and a calculated phase response with filter coefficients of the non-first-order all-pass recursive filter may be minimized to yield a set of optimized values for the filter coefficients of the non-first-order all-pass recursive filter.

7. 发明申请

US20150139447A1 AUTOMATED CONSTRUCTION OF INFINITE IMPULSE RESPONSE FILTERS 审中-公开
标题翻译：自动构建无限冲击响应滤波器
公开(公告)号：US20150139447A1
公开(公告)日：2015-05-21
申请号：US14542795
申请日：2014-11-17
申请人： Ian Greenhoe
发明人： Ian Greenhoe
IPC分类号： H04R3/04
CPC分类号： H04R3/04 , H03H17/04 , H03H2017/009
摘要： Systems and methods can support constructing an infinite impulse response (IIR) filter. A desired frequency response may be received. An initial filter model may be constructed comprising complimentary pairs of component IIR filters based upon the desired frequency response. The filter model may be converged according to stepwise refinement of individual terms within the filter model. A global error for the converged filter model may be computed. An additional complimentary pair of component IIR filters may be incorporated into the filter model in response to the global error exceeding a maximum acceptable error. In response to incorporation of additional component IIR filters, convergence and evaluation of the filter model may be iterated. Upon final convergence of the filter model, an aggregate IIR filter may be generated by combing the component IIR filters.
摘要翻译：系统和方法可以支持构造无限脉冲响应（IIR）滤波器。可以接收期望的频率响应。可以构造初始滤波器模型，其包括基于所需频率响应的补充成对IIR滤波器。过滤器模型可以根据过滤器模型中的各个项的逐步细化来收敛。可以计算会聚过滤器模型的全局误差。响应于全局误差超过最大可接受误差，可以将额外的互补的组件IIR滤波器组合到滤波器模型中。响应于并入额外的组件IIR滤波器，可以迭代滤波器模型的收敛和评估。在滤波器模型的最终收敛之后，可以通过组合组件IIR滤波器来生成聚合IIR滤波器。

8. 发明申请

US20150109530A1 LOW LATENCY AND LOW COMPLEXITY PHASE SHIFT NETWORK 有权
标题翻译：低延迟和低复杂度相移网络
公开(公告)号：US20150109530A1
公开(公告)日：2015-04-23
申请号：US14403812
申请日：2013-05-14
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Yun Zhang
IPC分类号： H04N5/04
CPC分类号： H04N5/04 , H03H17/04 , H03H17/08 , H03H2017/009 , H03H2017/0472
摘要： A high performance, low complexity phase shift network may be created with one or more non-first-order all-pass recursive filters that are built on top of a plurality of first-order and/or second-order all-pass recursive filters and/or delay lines. A target time delay, whether large or small, may be specified as a constraint for a non-first-order all-pass recursive filter. A target phase response may be determined for the non-first-order all-pass recursive filter. Phase errors between the target phase response and a calculated phase response with filter coefficients of the non-first-order all-pass recursive filter may be minimized to yield a set of optimized values for the filter coefficients of the non-first-order all-pass recursive filter.
摘要翻译：可以使用一个或多个非一阶全通递归滤波器来创建高性能，低复杂度的相移网络，其构建在多个一阶和/或二阶全通递归滤波器之上，并且 /或延迟线。可以将目标时间延迟（无论大小还是小）指定为非一阶全通递归滤波器的约束。可以针对非一阶全通递归滤波器确定目标相位响应。可以将目标相位响应与具有非一阶全通递归滤波器的滤波器系数的计算相位响应之间的相位误差最小化，以产生非一阶全通递归滤波器的滤波器系数的一组优化值，传递递归过滤器。

9. 发明授权

US07702012B2 Infinite impulse response filter circuit and magnetic disk drive 有权
标题翻译：无限脉冲响应滤波电路和磁盘驱动器
公开(公告)号：US07702012B2
公开(公告)日：2010-04-20
申请号：US11653080
申请日：2007-01-11
申请人： Masashi Kisaka
发明人： Masashi Kisaka
IPC分类号： H03H7/40
CPC分类号： G11B20/10009 , G11B5/5582 , G11B5/59622 , G11B5/59694 , G11B19/042 , G11B20/10046 , G11B2220/2516 , H03H17/04 , H03H2017/009
摘要： An infinite impulse response (IIR) filter circuit in accordance with an embodiment of the invention has transfer function coefficients that are adaptively changed. Using a Nth-order polynomial A(z) and a polynomial B(z) whose order is not higher than N, the transfer function is defined by L ⁡ ( z ) = B ⁡ ( z ) A ⁡ ( z ) ; where ∏ i = 0 - 1 ⁢ ⁢ ( z 2 + 1 - 2 ⁢ ⁢ k i ⁢ z ) = 1 is also defined. The polynomial A(z) is transformed to make the term of the Nth power of z equal to 1. If the order of the polynomial A(z) is even, the polynomial A(z) is determined to satisfy the condition: A ⁡ ( z ) = 1 1 + l ⁢ ( ∏ i = 0 N / 2 - 1 ⁢ ⁢ ( z 2 + 1 - 2 ⁢ ⁢ k 2 ⁢ ⁢ i ⁢ z ) + l ⁡ ( z 2 - 1 ) ⁢ ∏ i = 0 N / 2 - 2 ⁢ ( z 2 + 1 - 2 ⁢ ⁢ k 2 ⁢ ⁢ i + 1 ⁢ z ) ) If the order N is odd, the polynomial A(z) is determined to satisfy the condition: A ⁡ ( z ) = 1 1 + l ⁢ ( ( z + 1 ) ⁢ ∏ i = 0 ( N - 1 ) / 2 - 1 ⁢ ⁢ ( z 2 + 1 - 2 ⁢ ⁢ k 2 ⁢ ⁢ i ⁢ z ) + l ⁡ ( z - 1 ) ⁢ ∏ i = 0 ( N - 1 ) / 2 - 1 ⁢ ( z 2 + 1 - 2 ⁢ ⁢ k 2 ⁢ ⁢ i + 1 ⁢ z ) ) where l and ki(i=0, 1, 2,,,) are real numbers.
摘要翻译：根据本发明的实施例的无限脉冲响应（IIR）滤波器电路具有自适应地改变的传递函数系数。使用N阶多项式A（z）和阶数不高于N的多项式B（z），传递函数由L⁡（z）= B⁡（z）A⁡（z）定义; 其中也定义了Πi = 0-1笨（z 2 + 1 -2⁢k i z z）= 1。多项式A（z）被变换以使得z的N次方的项等于1.如果多项式A（z）的顺序是偶数，则多项式A（z）被确定为满足条件：A⁡ （z）= 1 1 + 1（Πi = 0 N / 2-1⁢（z 2 + 1 -2⁢k 2⁢i z）+ 1⁡（z 2 -1） = 0 N / 2 - 2（z 2 + 1-2 - k k 2⁢i + 1 z））如果阶数N为奇数，则多项式A（z）被确定为满足条件：A⁡ （z）= 1 1 + 1（（z + 1））i i = 0（N-1）/ 2-1（z 2 + 1-2 - k k 2⁢i z）+ 1 ⁡（z-1）Πi = 0（N-1）/ 2-1（z 2 + 1-2-k k 2⁢i + 1 z））其中l和ki（i = 1，2 ,,,）是实数。

10. 发明授权

US11996816B2 Non linear filter with group delay at pre-response frequency for high res radio 有权
公开(公告)号：US11996816B2
公开(公告)日：2024-05-28
申请号：US17006036
申请日：2020-08-28
申请人： Peter Graham Craven , John Robert Stuart
发明人： Peter Graham Craven , John Robert Stuart
IPC分类号： H03H17/02 , G11B20/10 , H03H17/00 , H03H17/04 , H03H17/06
CPC分类号： H03H17/0261 , G11B20/10 , H03H17/04 , G10H2250/071 , G10H2250/121 , G11B2020/10546 , H03H2017/009 , H03H2017/0472 , H03H17/0664
摘要： Methods and devices are described for reducing the audible effect of pre-responses in an audio signal. The pre-responses are effectively delayed by employing a digital non-minimum-phase filter, which includes a zero lying outside the unit circle in its z-transform response. This zero is not paired with another zero at a reciprocal position inside the unit circle, as this would linearise the phase modification. The filtering can introduce a greater group delay at the pre-response frequency than at a low frequency, such as 500 Hz or even 0 Hz. The technique can be used to reduce pre-responses in an existing audio signal and also to pre-empt pre-responses that would be introduced to the audio signal by subsequent processing.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式