公开(公告)号：US09779753B2

公开(公告)日：2017-10-03

申请号：US14789351

申请日：2015-07-01

Applicant: GN Netcom A/S

Inventor： Erik Witthøfft Rasmussen ,  Martin Rung ,  Rasmus Kongsgaard Olsson

IPC: H04B15/00 ,  H04R3/00 ,  G10L21/0324 ,  G10L21/0232

CPC classification number: G10L21/0324 ,  G10L21/0208 ,  G10L21/0232 ,  H03G9/005 ,  H03G9/025 ,  H04R3/00

Abstract: A method for attenuating undesired content in an audio signal and to an apparatus adapted to attenuate undesired content in an audio signal.The method has receiving an audio input signal (Si); providing a main audio signal (Sa) in dependence on the audio input signal (Si); determining an input level signal (Ln) indicating a signal level (Ln,i) of the main audio signal (Sa); applying a frequency-dependent gain to the main audio signal (Sa) to provide an audio output signal (So); providing an analysis signal (Sn) in dependence on the audio input signal (Si); determining a classification signal (Sc) indicating the presence in the analysis signal (Sn) determining a threshold control signal (St) indicating a frequency-dependent level threshold (72, 75, 76, Tf) for multiple frequency subbands; and determining the frequency-dependent gain in dependence on signal levels (Ln,i).

公开(公告)号：US09472180B2

公开(公告)日：2016-10-18

申请号：US14566959

申请日：2014-12-11

Applicant: GN Netcom A/S

Inventor： Rasmus Kongsgaard Olsson

IPC: A61F11/06 ,  G10K11/16 ,  H03B29/00 ,  G10K11/175 ,  H04R3/00 ,  H04R1/10 ,  G10L21/0208 ,  H04R1/40 ,  G10L21/0216

CPC classification number: G10K11/175 ,  G10L21/0208 ,  G10L2021/02166 ,  H04R1/1091 ,  H04R1/406 ,  H04R3/005 ,  H04R25/405 ,  H04R25/407 ,  H04R2201/10 ,  H04R2201/107

Abstract: A headset and a method configured to process audio signals from multiple microphones, comprising: a first pair of microphones (101,102) outputting a first pair of microphone signals and a second pair of microphones (103, 104) outputting a second pair of microphone signals; a first near-field beamformer (105) and a second near-field beamformer (106) each configured to receive a pair of microphone signals and adapt the spatial sensitivity of a respective pair of microphones as measured in a respective beamformed signal (XL; XR) output from a respective beamformer (105; 106); wherein the spatial sensitivity is adapted to suppress noise relative to a desired signal; a third beamformer (107) configured to dynamically combine the signals (XL; XR) output from the first beamformer (105) and the second beamformer (106) into a combined signal (XC); wherein the signals are combined such that signal energy in the combined signal is minimized while a desired signal is preserved; and a noise reduction unit (109) configured to process the combined signal (XC) from the third beamformer (107) and output the combined signal such that noise is reduced.

Abstract translation: 耳机和被配置为处理来自多个麦克风的音频信号的方法，包括：输出第一对麦克风信号的第一对麦克风（101,102）和输出第二对麦克风信号的第二对麦克风（103,104）; 第一近场波束形成器（105）和第二近场波束形成器（106），每个被配置为接收一对麦克风信号并且适应相应的一对麦克风的空间灵敏度，如在相应的波束形成信号（XL; XR ）从相应的波束形成器（105; 106）输出; 其中所述空间灵敏度适于抑制相对于期望信号的噪声; 第三波束形成器（107），被配置为将从第一波束形成器（105）和第二波束形成器（106）输出的信号（XL; XR）动态组合成组合信号（XC）; 其中所述信号被组合，使得组合信号中的信号能量被最小化，同时保持期望的信号; 以及噪声降低单元（109），被配置为处理来自第三波束形成器（107）的组合信号（XC），并输出组合信号，使得噪声降低。

公开(公告)号：US10225674B2

公开(公告)日：2019-03-05

申请号：US15862033

申请日：2018-01-04

Applicant: GN Netcom A/S

Inventor： Rasmus Kongsgaard Olsson ,  Martin Rung

IPC: H04R29/00 ,  G10L21/0216 ,  H04R1/10 ,  H04R3/00

Abstract: Disclosed is a method for optimizing noise cancellation in a headset, the headset comprising a headphone and a microphone unit comprising at least a first microphone and a second microphone, the method comprising: generating at least a first audio signal from the at least first microphone, where the first audio signal comprises a speech portion from a user of the headset and a noise portion from the surroundings; generating at least a second audio signal from the at least second microphone, where the second audio signal comprises a speech portion from the user of the headset and a noise portion from the surroundings; generating a noise cancelled output by filtering and summing at least a part of the first audio signal and at least a part of the second audio signal, where the filtering is adaptively configured to continually minimize the power of the noise cancelled output, and where the filtering is adaptively configured to continually provide that at least the amplitude spectrum of the speech portion of the noise cancelled output corresponds to the speech portion of a reference audio signal generated from at least one of the microphones.

公开(公告)号：US20150172807A1

公开(公告)日：2015-06-18

申请号：US14566579

申请日：2014-12-10

Applicant: GN Netcom A/S

Inventor： Rasmus Kongsgaard Olsson

IPC: H04R1/10 ,  H04R3/00

CPC classification number: G10K11/175 ,  G10L21/0208 ,  G10L2021/02166 ,  H04R1/1091 ,  H04R1/406 ,  H04R3/005 ,  H04R2201/10 ,  H04R2201/107

Abstract: An apparatus, such as a headset, configured to process audio signals from multiple microphones, comprising: a first pair of microphones (101, 102) outputting a first pair of microphone signals and a second pair of microphones (103, 104) outputting a second pair of microphone signals; a first beamformer (105) and a second beamformer (106) each configured to receive a pair of microphone signals and adapt the spatial sensitivity of a respective pair of microphones as measured in a respective beamformed signal (XL; XR) output from a respective beamformer (105; 106); wherein the spatial sensitivity is adapted to suppress noise relative to a desired signal; a third beamformer (107) configured to dynamically combine the signals (XL; XR) output from the first beamformer (105) and the second beamformer (106) into a combined signal (XC); wherein the signals are combined such that signal energy in the combined signal is minimized while a desired signal is preserved; and a noise reduction unit (109) configured to process the combined signal (XC) from the third beamformer (107) and output the combined signal such that noise is reduced.

Abstract translation: 一种被配置为处理来自多个麦克风的音频信号的装置，例如耳机，包括：第一对麦克风（101,102），其输出第一对麦克风信号;以及第二对麦克风（103,104），其输出第二麦克风 一对麦克风信号; 第一波束形成器（105）和第二波束形成器（106），每个被配置为接收一对麦克风信号，并且适应相应的一对麦克风的空间灵敏度，如从相应波束形成器输出的相应的波束形成信号（XL; XR） （105; 106）; 其中所述空间灵敏度适于抑制相对于期望信号的噪声; 第三波束形成器（107），被配置为将从第一波束形成器（105）和第二波束形成器（106）输出的信号（XL; XR）动态组合成组合信号（XC）; 其中所述信号被组合，使得组合信号中的信号能量被最小化，同时保持期望的信号; 以及噪声降低单元（109），被配置为处理来自第三波束形成器（107）的组合信号（XC），并输出组合信号，使得噪声降低。

公开(公告)号：US20150170632A1

公开(公告)日：2015-06-18

申请号：US14566959

申请日：2014-12-11

Applicant: GN Netcom A/S

Inventor： Rasmus Kongsgaard Olsson

IPC: G10K11/175

CPC classification number: G10K11/175 ,  G10L21/0208 ,  G10L2021/02166 ,  H04R1/1091 ,  H04R1/406 ,  H04R3/005 ,  H04R25/405 ,  H04R25/407 ,  H04R2201/10 ,  H04R2201/107

Abstract: A headset and a method configured to process audio signals from multiple microphones, comprising: a first pair of microphones (101,102) outputting a first pair of microphone signals and a second pair of microphones (103, 104) outputting a second pair of microphone signals; a first near-field beamformer (105) and a second near-field beamformer (106) each configured to receive a pair of microphone signals and adapt the spatial sensitivity of a respective pair of microphones as measured in a respective beamformed signal (XL; XR) output from a respective beamformer (105; 106); wherein the spatial sensitivity is adapted to suppress noise relative to a desired signal; a third beamformer (107) configured to dynamically combine the signals (XL; XR) output from the first beamformer (105) and the second beamformer (106) into a combined signal (XC); wherein the signals are combined such that signal energy in the combined signal is minimized while a desired signal is preserved; and a noise reduction unit (109) configured to process the combined signal (XC) from the third beamformer (107) and output the combined signal such that noise is reduced.

Abstract translation: 耳机和被配置为处理来自多个麦克风的音频信号的方法，包括：输出第一对麦克风信号的第一对麦克风（101,102）和输出第二对麦克风信号的第二对麦克风（103,104）; 第一近场波束形成器（105）和第二近场波束形成器（106），每个被配置为接收一对麦克风信号并且适应相应的一对麦克风的空间灵敏度，如在相应的波束形成信号（XL; XR ）从相应的波束形成器（105; 106）输出; 其中所述空间灵敏度适于抑制相对于期望信号的噪声; 第三波束形成器（107），被配置为将从第一波束形成器（105）和第二波束形成器（106）输出的信号（XL; XR）动态组合成组合信号（XC）; 其中所述信号被组合，使得组合信号中的信号能量被最小化，同时保持期望的信号; 以及噪声降低单元（109），被配置为处理来自第三波束形成器（107）的组合信号（XC），并输出组合信号，使得噪声降低。