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：US09479627B1

公开(公告)日：2016-10-25

申请号：US14982864

申请日：2015-12-29

Applicant: GN Netcom A/S

Inventor： Martin Rung ,  Mads Dyrholm

IPC: H04M1/00 ,  H04M9/00 ,  H04M1/62 ,  H04M3/00

CPC classification number: H04M1/035 ,  H04M1/62 ,  H04M3/002 ,  H04M3/568

Abstract: The present invention relates to a desktop speakerphone constructed to make the desktop speakerphone less space-consuming while having improved audio qualities. The desktop speakerphone preferably has two microphone clusters 6, 7 mounted at the upper side of the housing 2 closer towards respective longitudinal ends 8 of the latter, so that each microphone cluster 6, 7 can receive voice sound Av from one or more of the users. Each microphone cluster 6, 7 preferably comprises three pressure microphones 10, 11, 12. Furthermore, within each microphone cluster 6, 7, the second and third sound inlets 14, 15 are preferably arranged symmetrically on opposite sides of the respective median plane 18. Within each microphone cluster 6, 7, the relative arrangement of the three sound inlets 13, 14, 15 defines a respective microphone axis 9, 19 for each of the microphone pairs 10, 11, 10, 12. The microphone axis 9 of the first microphone pair 10, 11 extends through the first and the second sound inlet 13, 14, while the microphone axis 19 of the second microphone pair 10, 12 extends through the first and the third sound inlet 13, 15. The microphones are connected to multiple array processors, each configured to provide an array signal in dependence on two or more of the multiple microphone signals. First and second array processor configured to provide array signals in dependence on microphone signals.

Abstract translation: 本发明涉及一种台式扬声器电话，其被构造成使得台式扬声器电话在具有改进的音频质量的同时不占空间。 桌面扬声器优选地具有两个安装在壳体2的上侧的麦克风簇6,7，靠近其后端的相应纵向端8，使得每个麦克风簇6,7可以从一个或多个用户接收声音Av 。 每个麦克风簇6,7优选地包括三个压力麦克风10,11,12。此外，在每个麦克风簇6,7内，第二和第三声音入口1​​4,15优选地对称地布置在相应的中间平面18的相对侧上。 在每个麦克风簇6,7内，三个声音入口1​​3,14,15的相对布置为每个麦克风对10,11,10,12定义了相应的麦克风轴线9,19。第一 麦克风对10,11延伸穿过第一和第二声音入口1​​3,14，而第二麦克风对10,12的麦克风轴线19延伸穿过第一和第三声音入口1​​3,15。麦克风连接到多个 阵列处理器，其被配置为根据多个麦克风信号中的两个或更多个提供阵列信号。 第一和第二阵列处理器被配置为根据麦克风信号提供阵列信号。

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：US09788110B2

公开(公告)日：2017-10-10

申请号：US14983018

申请日：2015-12-29

Applicant: GN Netcom A/S

Inventor： Martin Rung ,  Mads Dyrholm

IPC: H04R3/00 ,  G10L21/0216

CPC classification number: H04R3/005 ,  G10L2021/02166 ,  H04R2430/01 ,  H04R2499/11

Abstract: The present invention relates to a desktop speakerphone array processor for microphones which produces high quality sound. The microphone array has a front direction defined by the line of sight from a microphone inlet of the second microphone towards a microphone inlet of the first microphone, the array processor being connected to receive a front microphone signal from the first microphone, a rear microphone signal from the second microphone and an audio output signal representing a speaker sound emitted from a sound driver arranged near the first and second microphones and in the rearwards hemisphere with respect to the front direction of the microphone array, the array processor being configured to provide a first array signal having a first directivity pattern with a main lobe oriented in the front direction of the microphone array in dependence on the front microphone signal, the rear microphone signal and the audio output signal. The array process has a filter configured to filter the rear microphone signal using a first set of filter coefficients and a subtractor configured to subtract the filtered signal from the front microphone signal and to provide the result in a difference signal. The filter controller repeatedly performs a cross-power analysis based on the audio output signal, the front microphone signal and the rear microphone signal and to determine the first set of filter coefficients in dependence on the result of the cross-power analysis.

公开(公告)号：US20170188141A1

公开(公告)日：2017-06-29

申请号：US14983018

申请日：2015-12-29

Applicant: GN Netcom A/S

Inventor： Martin Rung ,  Mads Dyrholm

IPC: H04R3/00 ,  G10L21/0232 ,  H04R29/00

CPC classification number: H04R3/005 ,  G10L2021/02166 ,  H04R2430/01 ,  H04R2499/11

Abstract: The present invention relates to a desktop speakerphone array processor for microphones which produces high quality sound. The microphone array has a front direction defined by the line of sight from a microphone inlet of the second microphone towards a microphone inlet of the first microphone, the array processor being connected to receive a front microphone signal from the first microphone, a rear microphone signal from the second microphone and an audio output signal representing a speaker sound emitted from a sound driver arranged near the first and second microphones and in the rearwards hemisphere with respect to the front direction of the microphone array, the array processor being configured to provide a first array signal having a first directivity pattern with a main lobe oriented in the front direction of the microphone array in dependence on the front microphone signal, the rear microphone signal and the audio output signal. The array process has a filter configured to filter the rear microphone signal using a first set of filter coefficients and a subtractor configured to subtract the filtered signal from the front microphone signal and to provide the result in a difference signal. The filter controller repeatedly performs a cross-power analysis based on the audio output signal, the front microphone signal and the rear microphone signal and to determine the first set of filter coefficients in dependence on the result of the cross-power analysis.