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公开(公告)号：US10827265B2
公开(公告)日：2020-11-03
申请号：US16255537
申请日：2019-01-23
Inventor： Ziad Hatab , Jie Su , Kaichow Lau
IPC: H04R3/04 , G10L25/21 , G10L25/18 , H04R3/00 , G10L21/0316
Abstract: A method for processing audio data for output to a transducer may include receiving an audio signal, filtering the audio signal with a fixed filter having fixed filter coefficients to generate a filtered audio signal, and outputting the filtered audio signal to the transducer. The fixed filter coefficients of the fixed filter may be tuned by using a psychoacoustic model of the transducer to determine audibility masking thresholds for a plurality of frequency sub-bands, allocating compensation coefficients to the plurality of frequency sub-bands, and fitting the fixed filter coefficients with the compensation coefficients allocated to the plurality of sub-bands.
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公开(公告)号：US10225654B1
公开(公告)日：2019-03-05
申请号：US15698142
申请日：2017-09-07
Inventor： Eric Lindemann , Ziad Hatab
Abstract: A spectral tilt of an audio signal is used to determine whether a speaker will introduce perceptible distortion during playback of the audio signal. The spectral tilt may be indicated by determining a ratio between energy in a distortion-producing frequency band and energy in a distortion-masking frequency band. Based on the determined spectral tilt, the distortion-producing frequency band may be attenuated to reduce the distortion introduced by the speaker. Additionally, the distortion-masking frequency band may be amplified to reduce perceptibility of the distortion produced by the speaker.
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公开(公告)号：US20190075395A1
公开(公告)日：2019-03-07
申请号：US15698142
申请日：2017-09-07
Inventor： Eric Lindemann , Ziad Hatab
Abstract: A spectral tilt of an audio signal is used to determine whether a speaker will introduce perceptible distortion during playback of the audio signal. The spectral tilt may be indicated by determining a ratio between energy in a distortion-producing frequency band and energy in a distortion-masking frequency band. Based on the determined spectral tilt, the distortion-producing frequency band may be attenuated to reduce the distortion introduced by the speaker. Additionally, the distortion-masking frequency band may be amplified to reduce perceptibility of the distortion produced by the speaker.
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公开(公告)号：US20190074805A1
公开(公告)日：2019-03-07
申请号：US15698193
申请日：2017-09-07
Inventor： Ziad Hatab , Eric Lindemann , John Melanson
Abstract: Audio distortion by a speaker may be reduced by detecting onset audio events within an audio signal and modifying the audio to reduce the audio distortion perceived by a listener. The onsets may be detected using a psych-acoustic model by determining critical sub-band powers and corresponding masking thresholds. When a loudness value calculated from the CSBs and masking thresholds exceeds a threshold level, certain frequency bands may be attenuated and other frequency bands may be amplified. The audio modification may be performed on a frame-by-frame basis and each frame may be processed multiple times until the onset is sufficiently masked or attenuated.
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