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公开(公告)号：US09820042B1
公开(公告)日：2017-11-14
申请号：US15144631
申请日：2016-05-02
Applicant: Knowles Electronics, LLC
Inventor： Jonathon Ray , John Woodruff , Shailesh Sakri , Tony Verma
CPC classification number: H04R3/005 , H04R1/326 , H04R2430/20 , H04R2499/11 , H04R2499/15 , H04S1/002
Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
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Patent Agency Ranking
公开(公告)号：US20170318387A1
公开(公告)日：2017-11-02
申请号：US15144631
申请日：2016-05-02
Applicant: Knowles Electronics, LLC
Inventor： Jonathon Ray , John Woodruff , Shailesh Sakri , Tony Verma
CPC classification number: H04R3/005 , H04R1/326 , H04R2430/20 , H04R2499/11 , H04R2499/15 , H04S1/002
Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
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公开(公告)号：US10257611B2
公开(公告)日：2019-04-09
申请号：US15806766
申请日：2017-11-08
Applicant: Knowles Electronics, LLC
Inventor： Jonathon Ray , John Woodruff , Shailesh Sakri , Tony Verma
Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
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公开(公告)号：US20180070174A1
公开(公告)日：2018-03-08
申请号：US15806766
申请日：2017-11-08
Applicant: Knowles Electronics, LLC
Inventor： Jonathon Ray , John Woodruff , Shailesh Sakri , Tony Verma
CPC classification number: H04R3/005 , H04R1/326 , H04R2430/20 , H04R2499/11 , H04R2499/15 , H04S1/002
Abstract: Systems and methods for stereo separation and directional suppression are provided. An example method includes receiving a first audio signal, representing sound captured by a first microphone associated with a first location, and a second audio signal, representing sound captured by a second microphone associated with a second location. The microphones comprise omni-directional microphones. The distance between the first and second microphones is limited by the size of a mobile device. A first channel signal of a stereo signal is generated by forming, based on the first and second audio signals, a first beam at the first location. A second channel signal of the stereo signal is generated by forming, based on the first and second audio signals, a second beam at the second location. First and second directions, associated respectively with the first and second beams, are fixed relative to a line between the first and second locations.
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公开(公告)号：US10262673B2
公开(公告)日：2019-04-16
申请号：US15886288
申请日：2018-02-01
Applicant: Knowles Electronics, LLC
Inventor： Jonathon Ray , Anil Kumar Yadav
IPC: G10L21/0208 , G10L21/0232 , G10L21/0216
Abstract: A method for reducing noise within an acoustic signal includes receiving at least a primary acoustic signal from a primary microphone and a secondary acoustic signal from a different, secondary microphone, wherein the primary acoustic signal includes a speech component emanating from a user and a noise component. The method also includes measuring a first value of a first coefficient based on the primary and secondary signals and performing a noise cancellation process based on the measured first value of the first coefficient to produce a set of noise-cancelled primary sub-bands. The method also includes generating, by the processor, a set of multiplicative gain mask values, the multiplicative gain mask values having a frequency dependency that is based at least in part on a pre-indicated approximate sound pressure level of the speech component.
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公开(公告)号：US20180233158A1
公开(公告)日：2018-08-16
申请号：US15886288
申请日：2018-02-01
Applicant: Knowles Electronics, LLC
Inventor： Jonathon Ray , Anil Kumar Yadav
IPC: G10L21/0208
CPC classification number: G10L21/0208 , G10L21/0232 , G10L2021/02165
Abstract: A method for reducing noise within an acoustic signal includes receiving at least a primary acoustic signal from a primary microphone and a secondary acoustic signal from a different, secondary microphone, wherein the primary acoustic signal includes a speech component emanating from a user and a noise component. The method also includes measuring a first value of a first coefficient based on the primary and secondary signals and performing a noise cancellation process based on the measured first value of the first coefficient to produce a set of noise-cancelled primary sub-bands. The method also includes generating, by the processor, a set of multiplicative gain mask values, the multiplicative gain mask values having a frequency dependency that is based at least in part on a pre-indicated approximate sound pressure level of the speech component.
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