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1.发明授权公开(公告)号：US11687176B2
公开(公告)日：2023-06-27
申请号：US17691672
申请日：2022-03-10
发明人： Joshua Jersild
IPC分类号： G06F3/038 , G06F3/0346
CPC分类号： G06F3/038 , G06F3/0346
摘要： The present invention provides a method and apparatus that are directed to accepting a plurality of positional data with corresponding times of the motion, determining one or more continuous positional functions that together represent an approximation of path of the positional data, and determining, for each positional function, one or more time functions that together represent an approximation of the times for the positional data corresponding to the positional functions.
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公开(公告)号：US11604067B2
公开(公告)日：2023-03-14
申请号：US17127307
申请日：2020-12-18
发明人： Michael J. Felice
IPC分类号： G01C21/16
摘要： A method for stabilizing a magnetic field of an inertial measurement unit (IMU), is provided that includes initializing accelerometer and gyroscope (AG) heading data for the IMU and initializing accelerometer, gyroscope and magnetometer (AGM) heading data for the IMU. Determining whether a tracking state exists and completing processing of the AG heading data and the AGM heading data if the tracking state does not exist. Calculating a magnetic field error if the tracking state exists.
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公开(公告)号：US20210090585A1
公开(公告)日：2021-03-25
申请号：US17113479
申请日：2020-12-07
IPC分类号： G10L19/16 , H04N19/625 , H04N19/44 , H04B1/66 , H04B3/20 , G10L19/025 , G10L19/00 , G10L19/032 , G10L19/008 , G10L19/02 , H04L29/06 , H04N21/233 , H03H17/02 , H04B3/21
摘要： 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. The encoder operable to transform the error signal into high resolution frequency components using the MDCT block sizes, quantize the scale factors and frequency components, and encode the quantized lines, block sizes, and quantized scale factors for inclusion in the bitstream.
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公开(公告)号：US10770088B2
公开(公告)日：2020-09-08
申请号：US15151200
申请日：2016-05-10
发明人： James D. Johnston , Stephen White
摘要： A decoder generates decoded signals based on quantized signals. The decoder includes an inverse quantizer and a predictor circuit. The quantized signals are generated in an encoder by low-pass filtering an input signal and encoding the filtered signal using adaptive differential pulse code modulation. The predictor circuit has filter coefficients based on a frequency response of the low-pass filter used to filter the input signal.
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公开(公告)号：US11823691B2
公开(公告)日：2023-11-21
申请号：US18100275
申请日：2023-01-23
IPC分类号： G10L19/025 , G10L19/16 , H04N19/625 , H04N19/44 , H04B1/66 , H04B3/20 , G10L19/00 , G10L19/032 , H04L65/70 , H04L65/75 , G10L19/008 , G10L19/02 , H04N21/233 , H03H17/02 , H04B3/21
CPC分类号： G10L19/025 , G10L19/008 , G10L19/0017 , 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
摘要： 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. The encoder operable to transform the error signal into high resolution frequency components using the MDCT block sizes, quantize the scale factors and frequency components, and encode the quantized lines, block sizes, and quantized scale factors for inclusion in the bitstream.
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公开(公告)号：US11562758B2
公开(公告)日：2023-01-24
申请号：US17707133
申请日：2022-03-29
IPC分类号： G10L19/16 , H04N19/625 , H04N19/44 , H04B1/66 , H04B3/20 , G10L19/025 , G10L19/00 , G10L19/032 , H04L65/70 , H04L65/75 , G10L19/008 , G10L19/02 , H04N21/233 , H03H17/02 , H04B3/21
摘要： 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. The encoder operable to transform the error signal into high resolution frequency components using the MDCT block sizes, quantize the scale factors and frequency components, and encode the quantized lines, block sizes, and quantized scale factors for inclusion in the bitstream.
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7.发明授权公开(公告)号：US11281312B2
公开(公告)日：2022-03-22
申请号：US16960815
申请日：2019-01-07
发明人： Joshua Jersild
IPC分类号： G06F3/038 , G06F3/0346
摘要： The present invention provides a method that includes accepting a plurality of positional data with corresponding times of the motion, determining one or more continuous positional functions that together represent an approximation of path of the positional data, and determining, for each positional function, one or more time functions that together represent an approximation of the times for the positional data corresponding to the positional functions.
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公开(公告)号：US20210190501A1
公开(公告)日：2021-06-24
申请号：US17127307
申请日：2020-12-18
发明人： Michael J. Felice
IPC分类号： G01C21/16
摘要： A method for stabilizing a magnetic field of an inertial measurement unit (IMU), is provided that includes initializing accelerometer and gyroscope (AG) heading data for the IMU and initializing accelerometer, gyroscope and magnetometer (AGM) heading data for the IMU. Determining whether a tracking state exists and completing processing of the AG heading data and the AGM heading data if the tracking state does not exist. Calculating a magnetic field error if the tracking state exists.
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公开(公告)号：US20210082448A1
公开(公告)日：2021-03-18
申请号：US16568858
申请日：2019-09-12
发明人： James David Johnston , King Wei Hor
IPC分类号： G10L19/26
摘要： A method for encoding an audio signal, comprising using one or more algorithms operating on a processor to filter the audio signal into two output signals, wherein each output signal has a sampling rate that is equal to a sampling rate of the audio signal, and wherein one of the output signals includes high frequency data. Using one or more algorithms operating on the processor to window the high frequency data by selecting a set of the high frequency data. Using one or more algorithms operating on the processor to determine a set of linear predictive coding (LPC) coefficients for the windowed data. Using one or more algorithms operating on the processor to generate energy scale values for the windowed data. Using one or more algorithms operating on the processor to generate an encoded high frequency bitstream.
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公开(公告)号：US10699725B2
公开(公告)日：2020-06-30
申请号：US15151109
申请日：2016-05-10
发明人： James D. Johnston , Stephen White
摘要： An encoder includes a low-pass filter to filter input audio signals. The low-pass filter has fixed filter coefficients. The encoder generates quantized signals based on a difference signal. The encoder includes an adaptive quantizer and a decoder to generate feedback signals. The decoder has an inverse quantizer and a predictor. The predictor has fixed control parameters which are based on a frequency response of the low-pass filter. The predictor may include a finite impulse response filter having fixed filter coefficients. The decoder may include an adaptive noise shaping filter coupled between the low-pass filter and the encoder. The adaptive noise shaping filter flattens signals within a frequency spectrum corresponding to a frequency spectrum of the low-pass filter.
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