公开(公告)号：US20250038687A1

公开(公告)日：2025-01-30

申请号：US18765709

申请日：2024-07-08

Applicant: HYUNDAI MOBIS CO., LTD.

Inventor： Di Do CHOI ,  Jae Min KUK

IPC: H02P23/12 ,  B62D5/04 ,  H03H17/02

Abstract: Proposed are an apparatus for and a method of optimizing a parameter of a notch filter for use in an electric power steering apparatus to eliminate noise and vibration occurring in the electric power steering apparatus. The apparatus includes: a communication interface, and a processor operatively connected to the communication interface, wherein the processor receives through the communication interface a torque signal from a torque sensor detecting column torque resulting from rotation of a steering wheel, detects an optimal value for a notch depth of the notch filter that minimizes a function value of an objective function that is defined as a mean squared error between the torque signal and a preset target torque signal of the notch filter, and applies the optimal value to the notch filter.

公开(公告)号：US12206381B2

公开(公告)日：2025-01-21

申请号：US18100601

申请日：2023-01-24

Applicant: Infineon Technologies AG

Inventor： Reinhard Kussian ,  Andrea Manzini

IPC: H03H17/06 ,  H03H17/00 ,  H03H17/02

Abstract: Methods and apparatus are provided for adapting gain elements in digital filter chains. In one example, a digital filter chain includes a first digital filter and a second digital filter having an input coupled to an output of the first digital filter. A common gain is applied to signal samples passing between the first digital filter and the second digital filter, the common gain corresponding to a product of an output gain associated with the first digital filter and an input gain associated with the second digital filter. In another example, a digital filter includes an adjustable input gain element and an adjustable output gain element. The adjustable input gain element is configured to apply a gain value to an input signal sample, the gain value comprising a resultant difference of a bitshift configured for the digital filter and a bitwidth extension value. The adjustable output gain element is configured to apply an opposite of the gain value to an output signal sample.

公开(公告)号：US12159642B2

公开(公告)日：2024-12-03

申请号：US18452697

申请日：2023-08-21

Applicant: DOLBY INTERNATIONAL AB

Inventor： Per Ekstrand

IPC: G10L21/00 ,  G06F17/10 ,  G06F17/11 ,  G10L19/008 ,  G10L19/02 ,  G10L19/26 ,  H03H17/02 ,  H04R3/04 ,  H04S7/00

Abstract: An apparatus and method are disclosed for processing an audio signal. The apparatus includes an input interface, a digital filterbank having an analysis part and a synthesis part, a first phase shifter, a spectral envelope adjuster, a second phase shifter, and an output interface. The first phase shifter and the second phase shifter reduce a complexity of the digital filterbank, which includes both analysis and synthesis filters that are complex-exponential modulated versions of a prototype filter.

公开(公告)号：US20240380388A1

公开(公告)日：2024-11-14

申请号：US18574485

申请日：2021-07-02

Applicant: NEC Corporation

Inventor： Eita Kobayashi

IPC: H03H17/02

Abstract: A filter processing device that includes an address control unit that specifies, based on the offset amount of a light source frequency and a subcarrier center point for each subcarrier, a write address and a read address for a plurality of items of data included in Fourier transform data based on an optical signal, and a storage unit in which a plurality of items of data are written to the write address specified by the address control unit and in which data is read out from the read address specified by the address control unit. The address control unit specifies the write address and the read address so that compensation for the offset amount and separation of the subcarrier are performed by the same storage unit.

公开(公告)号：US20240369630A1

公开(公告)日：2024-11-07

申请号：US18648172

申请日：2024-04-26

Applicant: Nordic Semiconductor ASA

Inventor： Christian HERGOT ,  John Raul REBOLLOS ,  Arne VENÅS ,  Kaspar MOULIN

IPC: G01R31/3185 ,  H03H17/02 ,  H03K5/00 ,  H03K5/01 ,  H03K19/20

Abstract: A circuit portion for filtering digital signals comprises a first delay circuit portion, a second delay circuit portion, and a logic circuit portion. The first delay circuit portion introduces a time delay to rising edges of an input signal and outputs a first delayed digital signal. The second delay circuit portion introduces a time delay to falling edges of the input signal and outputs a second delayed digital signal. The logic circuit portion outputs a signal which retains a current state when the first and second delayed signals have different states, and a state that is dependent on a state of the first and second delayed signals when the first and second delayed 10 signals have the same state. The circuit portion effectively removes glitches—i.e. pulses of short duration—from the input signal.

公开(公告)号：US12080303B2

公开(公告)日：2024-09-03

申请号：US18514393

申请日：2023-11-20

Applicant: IMMERSION NETWORKS, INC.

Inventor： James David Johnston ,  Stephen Daniel White ,  King Wei Hor ,  Barry M. Genova

IPC: G10L19/025 ,  G10L19/00 ,  G10L19/008 ,  G10L19/02 ,  G10L19/032 ,  G10L19/16 ,  H03H17/02 ,  H04B1/66 ,  H04B3/20 ,  H04B3/21 ,  H04L65/70 ,  H04L65/75 ,  H04N19/44 ,  H04N19/625 ,  H04N21/233

CPC classification number: G10L19/025 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/167 ,  H03H17/0272 ,  H04B1/667 ,  H04B3/20 ,  H04B3/21 ,  H04L65/70 ,  H04L65/75 ,  H04N19/45 ,  H04N19/625 ,  H04N21/233 ,  G10L19/0212

Abstract: An encoder operable to filter audio signals into a plurality of frequency band components, generate quantized digital components for each band, identify a potential for pre-echo events within the generated quantized digital components, generate an approximate signal by decoding the quantized digital components using inverse pulse code modulation, generate an error signal by comparing the approximate signal with the sampled audio signal, and process the error signal and quantized digital components. The encoder operable to process the error signal by processing delayed audio signals and Q band values, determining the potential for pre-echo events from the Q band values, and determining scale factors and MDCT block sizes for the potential for pre-echo events.

公开(公告)号：US20240213959A1

公开(公告)日：2024-06-27

申请号：US18085790

申请日：2022-12-21

Applicant: Rivian IP Holdings, LLC

Inventor： Yanjun Shi ,  Zahra Mohajerani

IPC: H03H17/02

CPC classification number: H03H17/0219 ,  H02P23/14

Abstract: Systems and methods are provided for detecting noise in one or more of samples of a first signal that corresponds to a phase current of a multiphase system, determining to apply a digital noise filter based on the noise, and applying a digital noise filter. Applying the digital noise filter may include generating a reconstructed signal based on two other signals corresponding to respective phase currents of the multiphase system, and outputting the reconstructed signal to replace the one or more samples.

公开(公告)号：US20240186808A1

公开(公告)日：2024-06-06

申请号：US18519932

申请日：2023-11-27

Applicant: Enphase Energy, Inc.

Inventor： Donald Richard ZIMMANCK ,  Blake Richard LUNDSTROM

IPC: H02J7/00 ,  G01R31/3842 ,  H03H17/02

CPC classification number: H02J7/0048 ,  G01R31/3842 ,  H02J7/00712 ,  H03H17/0257

Abstract: A storage system configured for use with an energy management system is provided herein and comprises a battery, a battery management unit coupled to the battery and a power converter comprising plurality of microinverters operably coupled to the battery and the battery management unit, each microinverter of the plurality of microinverters configured to calculate an estimate of state-of-charge of the battery and periodically communicate a calculated estimate of state-of-charge to the other microinverters, such that each microinverter of the plurality of microinverters calculates an average state-of-charge of the battery and communicates the calculated average state-of-charge to the battery management unit for controlling charging/discharging of the battery.

公开(公告)号：USRE49999E1

公开(公告)日：2024-06-04

申请号：US17845607

申请日：2022-06-21

Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

Inventor： Markus Schnell ,  Manfred Lutzky ,  Markus Lohwasser ,  Markus Schmidt ,  Marc Gayer ,  Michael Mellar ,  Bernd Edler ,  Markus Multrus ,  Gerald Schuller ,  Ralf Geiger ,  Bernhard Grill

IPC: G10L19/00 ,  G10L19/02 ,  G10L19/022 ,  G10L25/45 ,  H03H17/02 ,  G10L21/038

CPC classification number: G10L19/0204 ,  G10L19/022 ,  G10L25/45 ,  H03H17/0266 ,  G10L21/038

Abstract: An embodiment of an apparatus for generating audio subband values in audio subband channels includes an analysis windower for windowing a frame of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function including a sequence of window coefficients to obtain windowed samples. The analysis window function includes a first number of window coefficients derived from a larger window function including a sequence of a larger second number of window coefficients, wherein the window coefficients of the window function are derived by an interpolation of window coefficients of the larger window function. The apparatus further includes a calculator for calculating the audio subband values using the windowed samples.

公开(公告)号：US20240137010A1

公开(公告)日：2024-04-25

申请号：US18482983

申请日：2023-10-09

Applicant: Aktiebolaget SKF

Inventor： James P. LEBLANC ,  Patrik PÄÄJÄRVI

IPC: H03H17/06 ,  H03H17/02

CPC classification number: H03H17/0628 ,  H03H17/0213

Abstract: A device for processing a digital signal includes a Farrow structure (14) that applies to the digital signal a time-varying sample rate conversion from the fixed sample rate to a time varying sampling. The digital signal sampled at the time varying sampling is a resulting signal. The Farrow structure (14) is controlled from a control variable. A spectral analysis means (15) performs a spectral analysis of the resulting signal to determine the frequency values of the resulting signal. A determining means (16) determines a sparseness parameter of the frequency values of the resulting signal. A controlling means (17) modifies the control variable according to the value of the sparseness parameter.