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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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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：US20240323637A1
公开(公告)日：2024-09-26
申请号：US18291998
申请日：2022-07-25
发明人： James David Johnston
CPC分类号： H04S7/307 , H04S1/007 , H04S2400/13
摘要： A system for processing audio data, comprising a diffusion data filter coupled to a source of digital audio data, the diffusion data filter configured to generate filtered audio data from the digital audio data. A delay coupled to the source of digital audio data, the delay configured to delay the digital audio data by a predetermined amount. A first multiplier configured to multiply the filtered audio data by a distance gain parameter to generate a first intermediate output. A second multiplier configured to multiply the delayed digital audio data by a complementary distance gain parameter to generate a second intermediate output. An adder configured to add the first intermediate output and the second intermediate output to generate an audio output.
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公开(公告)号：US12080303B2
公开(公告)日：2024-09-03
申请号：US18514393
申请日：2023-11-20
IPC分类号： 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分类号： 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
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.
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公开(公告)号：US20240087583A1
公开(公告)日：2024-03-14
申请号：US18514393
申请日：2023-11-20
IPC分类号： 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分类号： 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
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：US20230113561A1
公开(公告)日：2023-04-13
申请号：US17910017
申请日：2021-03-12
摘要： A method for loudness equalization is provided that includes receiving input loudness data at an audio processing system. Converting gain data of the input loudness data to a linear scale at the audio processing system. Determining a reciprocal of a gain-linear loudness value as a function of the converted gain data using the audio processing system. Determining a compression ratio using the audio processing system. Performing temporal smoothing and look ahead processing using the audio processing system. Outputting gain data as a function of the temporal smoothing and look ahead processing using the audio processing system.
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公开(公告)号：US20230162747A1
公开(公告)日：2023-05-25
申请号：US18100275
申请日：2023-01-23
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
CPC分类号： G10L19/167 , H04N19/625 , H04N19/45 , H04B1/667 , H04B3/20 , G10L19/025 , G10L19/0017 , G10L19/032 , H04L65/70 , H04L65/75 , G10L19/008 , G10L19/0204 , H04N21/233 , H03H17/0272 , H04B3/21 , 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：US20220223164A1
公开(公告)日：2022-07-14
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 , G10L19/008 , G10L19/02 , H04L65/60 , 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：US10861474B2
公开(公告)日：2020-12-08
申请号：US16423834
申请日：2019-05-28
IPC分类号： H04B3/20 , G10L19/16 , H04N19/625 , H04N19/44 , H04B1/66 , 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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