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：US20180146479A1

公开(公告)日：2018-05-24

申请号：US15801946

申请日：2017-11-02

Applicant: GN Netcom A/S

Inventor： Erik Witthøfft Rasmussen

IPC: H04W72/04 ,  H04M1/725 ,  H04W52/50 ,  H04L5/00 ,  H04W52/28 ,  H04W52/24

CPC classification number: H04W72/0453 ,  H04L5/0037 ,  H04M1/72505 ,  H04W52/241 ,  H04W52/28 ,  H04W52/50

Abstract: A method and apparatus e.g. a headset or a base station for controlling channel selection in a communications system (400) using a DECT communications protocol, wherein multiple predefined channels are established using multiple carrier signals at respective carrier frequencies (F1, F2, . . . F8); comprising: transmitting (205) a first signal (S1) on multiple of the channels using automatic channel selection; transmitting a first signal and a second signal on multiple of the channels using automatic channel selection; setting a power level of carrier signals in a first group of channels to a first power level and setting a power level of carrier signals in a second group of channels to a second power level; wherein the second power level is preferably/deliberately set to a predetermined power level higher than the first power level. Wherein the first signal is transmitted in accordance with a first transmission scheme, wherein channel selection is restricted to the channels in the first group of channels, and the second signal is transmitted in accordance with the second transmission scheme, wherein channel selection is restricted to the channels in the second group of channels.

公开(公告)号：US20150003623A1

公开(公告)日：2015-01-01

申请号：US14308973

申请日：2014-06-19

Applicant: GN Netcom A/S

Inventor： Erik Witthøfft Rasmussen

IPC: G10K11/00 ,  G10L15/20

CPC classification number: G10L21/0232 ,  G10K11/002 ,  G10L15/20 ,  G10L25/21 ,  G10L25/78 ,  G10L2021/02166 ,  H04R1/083 ,  H04R1/1083 ,  H04R3/005 ,  H04R2460/01

Abstract: Noise cancelling headsets and a method of improving audio sensitivity for a headset are disclosed. The headset comprises a speaker, a microphone unit comprising at least a first and a second microphone for picking up incoming sound and generating a first audio signal generated at least partly from the at least first microphone and a second audio signal being at least partly generated from the at least second microphone, a signal processor being configured to receive and analyse the first audio signal and the second audio signal to determine one or more equalization filter coefficients, an equalization filter configured to receive the second audio signal and the one or more equalization coefficients, and to equalize the second audio signal according to the determined one or more equalization filter coefficients to provide an output audio signal, wherein the one or more equalization filter coefficient are determined so as to approximate a power spectrum of the output audio signal to a power spectrum of the first audio signal.

Abstract translation: 公开了降噪头戴耳机和提高耳机音频灵敏度的方法。 耳机包括扬声器，麦克风单元至少包括第一麦克风和第二麦克风，用于拾取输入声音并产生至少部分地由至少第一麦克风产生的第一音频信号，第二音频信号至少部分地由 所述至少第二麦克风，信号处理器被配置为接收和分析所述第一音频信号和所述第二音频信号以确定一个或多个均衡滤波器系数;均衡滤波器，被配置为接收所述第二音频信号和所述一个或多个均衡系数 并且根据所确定的一个或多个均衡滤波器系数来均衡第二音频信号以提供输出音频信号，其中确定一个或多个均衡滤波器系数以将输出音频信号的功率谱近似为功率 第一音频信号的频谱。

公开(公告)号：US20170061983A1

公开(公告)日：2017-03-02

申请号：US15349050

申请日：2016-11-11

Applicant: GN Netcom A/S

Inventor： Erik Witthøfft Rasmussen

IPC: G10L21/0232 ,  H04R3/00 ,  H04R1/08 ,  G10L25/78 ,  G10L25/21

CPC classification number: G10L21/0232 ,  G10K11/002 ,  G10L15/20 ,  G10L25/21 ,  G10L25/78 ,  G10L2021/02166 ,  H04R1/083 ,  H04R1/1083 ,  H04R3/005 ,  H04R2460/01

Abstract: Noise cancelling headsets and a method of improving audio sensitivity for a headset are disclosed. The headset comprises a speaker, a microphone unit comprising at least a first and a second microphone for picking up incoming sound and generating a first audio signal generated at least partly from the at least first microphone and a second audio signal being at least partly generated from the at least second microphone, a signal processor being configured to receive and analyse the first audio signal and the second audio signal to determine one or more equalization filter coefficients, an equalization filter configured to receive the second audio signal and the one or more equalization coefficients, and to equalize the second audio signal according to the determined one or more equalization filter coefficients to provide an output audio signal, wherein the one or more equalization filter coefficient are determined so as to approximate a power spectrum of the output audio signal to a power spectrum of the first audio signal.

Abstract translation: 公开了降噪头戴耳机和提高耳机音频灵敏度的方法。 耳机包括扬声器，麦克风单元至少包括第一麦克风和第二麦克风，用于拾取输入声音并产生至少部分地由至少第一麦克风产生的第一音频信号，第二音频信号至少部分地由 所述至少第二麦克风，信号处理器被配置为接收和分析所述第一音频信号和所述第二音频信号以确定一个或多个均衡滤波器系数;均衡滤波器，被配置为接收所述第二音频信号和所述一个或多个均衡系数 并且根据所确定的一个或多个均衡滤波器系数来均衡第二音频信号以提供输出音频信号，其中确定一个或多个均衡滤波器系数以将输出音频信号的功率谱近似为功率 第一音频信号的频谱。

公开(公告)号：US20160183264A1

公开(公告)日：2016-06-23

申请号：US14979348

申请日：2015-12-22

Applicant: GN Netcom A/S

Inventor： Erik Witthøfft Rasmussen

IPC: H04W72/04 ,  H04W52/50 ,  H04J1/00

CPC classification number: H04W72/0453 ,  H04L5/0037 ,  H04M1/72505 ,  H04W52/241 ,  H04W52/28 ,  H04W52/50

Abstract: A method and apparatus e.g. a headset or a base station for controlling channel selection in a communications system (400) using a DECT communications protocol, wherein multiple predefined channels are established using multiple carrier signals at respective carrier frequencies (F1,F2, . . . F8); comprising: transmitting (205) a first signal (S1) on multiple of the channels using automatic channel selection; transmitting a first signal and a second signal on multiple of the channels using automatic channel selection; setting a power level of carrier signals in a first group of channels to a first power level and setting a power level of carrier signals in a second group of channels to a second power level; wherein the second power level is preferably/deliberately set to a predetermined power level higher than the first power level. Wherein the first signal is transmitted in accordance with a first transmission scheme, wherein channel selection is restricted to the channels in the first group of channels, and the second signal is transmitted in accordance with the second transmission scheme, wherein channel selection is restricted to the channels in the second group of channels.

Abstract translation: 一种方法和装置，例如 用于使用DECT通信协议控制通信系统（400）中的频道选择的耳机或基站，其中使用在各个载波频率（F1，F2 ... F8）的多载波信号建立多个预定义信道; 包括：使用自动频道选择发送（205）多个频道上的第一信号（S1）; 使用自动频道选择在多个频道上发送第一信号和第二信号; 将第一组信道中的载波信号的功率电平设置为第一功率电平，并将第二组信道中的载波信号的功率电平设置为第二功率电平; 其中所述第二功率电平优选地/故意地设置为高于所述第一功率电平的预定功率电平。 其中，根据第一传输方案发送第一信号，其中信道选择被限制在第一组信道中的信道，并且根据第二传输方案发送第二信号，其中信道选择被限制到 频道在第二组频道。