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公开(公告)号：US11445290B1
公开(公告)日：2022-09-13
申请号：US17027258
申请日：2020-09-21
Applicant: Apple Inc.
Inventor： Scott C. Grinker , Vladan Bajic , Brian D. Clark , Tom-Davy W. Saux , Hanchi Chen
IPC: G10K11/178 , H04R1/10
Abstract: A method performed by an in-ear headphone that includes a speaker and an internal microphone. The method receives a microphone signal from the internal microphone that indicates a current sound pressure level (SPL) in an ear canal of a user. The current SPL is a result of a control leak from the in-ear headphone into an ambient environment that reduces a SPL in the ear canal between 2 dB and 25 dB at a frequency within a frequency range than if otherwise not present. The method determines an active noise cancellation (ANC) filter based on the microphone signal and generates an anti-noise signal using the ANC filter. The method drives the speaker using the anti-noise signal to reduce the current SPL in the ear canal of the user as much as 25 dB at a frequency within the frequency range.
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2.发明申请公开(公告)号：US20210099799A1
公开(公告)日：2021-04-01
申请号：US17019778
申请日：2020-09-14
Applicant: Apple Inc.
Inventor： Tom-Davy W. Saux , Brian D. Clark , Hanchi Chen , Victoria Chiu , Vladan Bajic , Dana Massie , Andrew P. Bright , Thomas M. Jensen
Abstract: A method for audio signal processing of microphone signals of a headphone. An audio signal from a first microphone of a headphone is filtered by an ANC system to produce a first filtered signal. Dynamic range control is performed upon the first filtered signal to produce a first dynamic range adjusted signal that drives a speaker of the headphone. Other aspects are also described and claimed.
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3.发明授权公开(公告)号：US10779105B1
公开(公告)日：2020-09-15
申请号：US16428766
申请日：2019-05-31
Applicant: Apple Inc.
Inventor： Brian D. Clark , Baptiste P. Paquier
IPC: H04S7/00 , H04S3/00 , G10L19/008
Abstract: A system and method to encode and decode multiple audio signals to provide independent control of the audio signals is provided. A host device may encode the audio signals to enable a complete separation of the constituent audio signals when the mixed stream is decoded on a playback device. The gains of the audio signals may be independently controlled before they are mixed to increase the intelligibility of one audio signal relative to another audio signal at the playback device. The ability to separate the constituent audio signals from the mixed signals at the playback device allows the processing operations performed on the constituent audio signals and the associated path latencies to be independently chosen. In addition, in applications where the mixed stream is transmitted from a single host device to multiple playback devices, the constituent audio signals may be selectively masked on a playback device to increase user privacy.
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4.发明授权公开(公告)号：US11166099B2
公开(公告)日：2021-11-02
申请号：US17019778
申请日：2020-09-14
Applicant: Apple Inc.
Inventor： Tom-Davy W. Saux , Brian D. Clark , Hanchi Chen , Victoria Chiu , Vladan Bajic , Dana Massie , Andrew P. Bright , Thomas M. Jensen
Abstract: A method for audio signal processing of microphone signals of a headphone. An audio signal from a first microphone of a headphone is filtered by an ANC system to produce a first filtered signal. Dynamic range control is performed upon the first filtered signal to produce a first dynamic range adjusted signal that drives a speaker of the headphone. Other aspects are also described and claimed.
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Patent Agency Ranking
公开(公告)号：US10564931B1
公开(公告)日：2020-02-18
申请号：US15946428
申请日：2018-04-05
Applicant: Apple Inc.
Inventor： Richard T. Witek , Brian D. Clark , Peter C. Eastty
Abstract: In various embodiments, a floating-point arithmetic circuit includes a range exception detection circuit and an output circuit. The range exception detection circuit may generate a selection signal that indicates whether a floating-point arithmetic result generated within the floating-point arithmetic circuit is within a specified range. The output circuit may output the floating-point arithmetic result in response to the selection signal indicating the floating-point arithmetic result is within a specified range. The output circuit may output a corresponding specified value in response to the selection signal indicating the floating-point arithmetic result is not within the specified range. Accordingly, floating-point arithmetic operations may be performed in combination with an operation that limits a range of an output to a specified range.
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6.发明授权公开(公告)号：US11432093B2
公开(公告)日：2022-08-30
申请号：US17019148
申请日：2020-09-11
Applicant: Apple Inc.
Inventor： Brian D. Clark , Baptiste P. Paquier
IPC: H04S7/00 , H04S3/00 , G10L19/008
Abstract: A system and method to encode and decode multiple audio signals to provide independent control of the audio signals is provided. A host device may encode the audio signals to enable a complete separation of the constituent audio signals when the mixed stream is decoded on a playback device. The gains of the audio signals may be independently controlled before they are mixed to increase the intelligibility of one audio signal relative to another audio signal at the playback device. The ability to separate the constituent audio signals from the mixed signals at the playback device allows the processing operations performed on the constituent audio signals and the associated path latencies to be independently chosen. In addition, in applications where the mixed stream is transmitted from a single host device to multiple playback devices, the constituent audio signals may be selectively masked on a playback device to increase user privacy.
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公开(公告)号：US11361745B2
公开(公告)日：2022-06-14
申请号：US17019774
申请日：2020-09-14
Applicant: Apple Inc.
Inventor： Tom-Davy W. Saux , Brian D. Clark , Thomas M. Jensen , Vladan Bajic
IPC: G10K11/178 , H04R1/10 , H04R1/40 , H04R3/00
Abstract: An audio system has an ambient sound enhancement (ASE) function, in which an against-the-ear audio device having a speaker converts a digitally processed version of an input audio signal into amplified sound. The amplification may be in accordance with a stored hearing profile of the user. The audio system also has an acoustic noise cancellation (ANC) function that may be combined in various ways with the ASE function, and that may be responsive to voice activity detection. Other aspects are also described and claimed.
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公开(公告)号：US20210097970A1
公开(公告)日：2021-04-01
申请号：US17019774
申请日：2020-09-14
Applicant: Apple Inc.
Inventor： Tom-Davy W. Saux , Brian D. Clark , Thomas M. Jensen , Vladan Bajic
IPC: G10K11/178 , H04R1/10 , H04R1/40 , H04R3/00
Abstract: An audio system has an ambient sound enhancement (ASE) function, in which an against-the-ear audio device having a speaker converts a digitally processed version of an input audio signal into amplified sound. The amplification may be in accordance with a stored hearing profile of the user. The audio system also has an acoustic noise cancellation (ANC) function that may be combined in various ways with the ASE function, and that may be responsive to voice activity detection. Other aspects are also described and claimed.
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公开(公告)号：US09900017B1
公开(公告)日：2018-02-20
申请号：US15485781
申请日：2017-04-12
Applicant: Apple Inc.
Inventor： Brian D. Clark
CPC classification number: H03M1/0626 , H03H15/00 , H03H17/06 , H03K5/15046 , H03M1/66 , H03M1/661 , H03M1/742
Abstract: A semi-digital finite impulse response, FIR, filter is configured as a sparse FIR filter and as a minimum phase lag FIR filter. The FIR filter has a delay line composed of a number of sets of delay units sequentially coupled to each other, and where some of the sets of delay units have one or more untapped delay units as part of a cascade of two or more single-sample delay units. An analog summing node is coupled to the taps and produces at its output an analog version of a digital input signal that is fed to an input of the delay line. Other embodiments are also described and claimed.
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