公开(公告)号：US20180167754A1

公开(公告)日：2018-06-14

申请号：US15862033

申请日：2018-01-04

Applicant: GN Netcom A/S

Inventor： Ramus Kongsgaard OLSSON ,  Martin RUNG

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

CPC classification number: H04R29/005 ,  G10L21/0216 ,  G10L2021/02165 ,  H04R1/1083 ,  H04R3/007 ,  H04R2410/01

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, andwhere 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：US20170004846A1

公开(公告)日：2017-01-05

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: G10L21/0324 ,  G10L21/0232

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

Abstract: The present invention relates to a method for attenuating undesired content in an audio signal and to an apparatus adapted to attenuate undesired content in an audio signal. The invention may be used to reduce adverse effects on a user caused by undesired or potentially harmful audio signals received from an audio communication network, such as e.g. a telephone network, and may advantageously be implemented in headsets and other audio communication apparatus that can receive audio signals from an audio communication network and provide corresponding sound signals to one or more users.The present invention provides a method for attenuating undesired content in an audio signal. The method comprises: 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) for each of multiple frequency subbands; 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) of one or more audio signals belonging to a first predefined audio signal class; determining a threshold control signal (St) indicating a frequency-dependent level threshold (72, 75, 76, Tf) for multiple frequency subbands in dependence on the classification signal (Sc); and determining the frequency-dependent gain in dependence on signal levels (Ln,i) indicated by the input level signal (Ln) and the frequency-dependent level threshold (72, 75, 76, Tf) indicated by the threshold control signal (St). The method is characterized in that the frequency dependency of the frequency-dependent level threshold (72, 75, 76, Tf) indicated by the threshold control signal (St) depends on the classification signal (Sc).This may provide an improved method for attenuating undesired content in an audio signal.

Abstract translation: 这可以提供用于衰减音频信号中不需要的内容的改进方法。

公开(公告)号：US20160105755A1

公开(公告)日：2016-04-14

申请号：US14871031

申请日：2015-09-30

Applicant: GN Netcom A/S

Inventor： Ramus Kongsgaard OLSSON ,  Martin RUNG

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

CPC classification number: H04R29/005 ,  G10L21/0216 ,  G10L2021/02165 ,  H04R1/1083 ,  H04R3/007 ,  H04R2410/01

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.

Abstract translation: 公开了一种用于优化耳机中的噪声消除的方法，耳机包括耳机和麦克风单元，其包括至少第一麦克风和第二麦克风，该方法包括：从至少第一麦克风产生至少第一音频信号， 其中第一音频信号包括来自耳机的用户的语音部分和来自周围环境的噪声部分; 从所述至少第二麦克风产生至少第二音频信号，其中所述第二音频信号包括来自所述耳机的用户的语音部分和来自所述周围环境的噪声部分; 通过对所述第一音频信号的至少一部分和所述第二音频信号的至少一部分进行滤波和求和来产生噪声消除输出，其中所述滤波被自适应地配置为连续地最小化所述噪声消除输出的功率，并且其中所述滤波 被自适应地配置为连续地提供至少噪声消除输出的语音部分的幅度频谱对应于从至少一个麦克风产生的参考音频信号的语音部分。