公开(公告)号：US20150334489A1

公开(公告)日：2015-11-19

申请号：US14276988

申请日：2014-05-13

Applicant: Apple Inc.

Inventor： Vasu IYENGAR ,  Fatos MYFTARI ,  Sorin V. DUSAN ,  Aram M. LINDAHL

IPC: H04R3/00 ,  H04R1/08

CPC classification number: H04R3/04 ,  H04R1/08 ,  H04R3/002 ,  H04R3/005 ,  H04R2499/11

Abstract: Digital signal processing for microphone partial occlusion detection is described. In one embodiment, an electronic system for audio noise processing and for noise reduction, using a plurality of microphones, includes a first noise estimator to process a first audio signal from a first one of the microphones, and generate a first noise estimate. The electronic system also includes a second noise estimator to process the first audio signal, and a second audio signal from a second one of the microphones, in parallel with the first noise estimator, and generate a second noise estimate. A microphone partial occlusion detector determines a low frequency band separation of the first and second audio signals and a high frequency band separation of the first and second audio signals to generate a microphone partial occlusion function that indicates whether one of the microphones is partially occluded.

Abstract translation: 描述了用于麦克风部分遮挡检测的数字信号处理。 在一个实施例中，使用多个麦克风的用于音频噪声处理和降噪的电子系统包括第一噪声估计器，用于处理来自第一麦克风的第一音频信号，并产生第一噪声估计。 电子系统还包括第二噪声估计器，用于处理第一音频信号，以及来自第二麦克风的第二音频信号与第一噪声估计器并行并产生第二噪声估计。 麦克风部分遮挡检测器确定第一和第二音频信号的低频带分离以及第一和第二音频信号的高频带间隔，以产生指示麦克风中的一个是否被部分遮挡的麦克风部分闭塞功能。

公开(公告)号：US20230377554A1

公开(公告)日：2023-11-23

申请号：US17746930

申请日：2022-05-17

Applicant: Apple Inc.

Inventor： Yang LU ,  Andrew P. BRIGHT ,  Fatos MYFTARI ,  Vasu IYENGAR

IPC: G10K11/178

CPC classification number: G10K11/17853

Abstract: Aspects of the subject technology provide for generation of a self-voice signal by an electronic device that is operating in an active noise cancellation mode. In this way, during a phone call, a video conference, or while listening to audio content, a user of the electronic device may benefit from active cancellation of ambient noise while still being able to hear their own voice when they speak. In various implementations described herein, the concurrent self-voice and automatic noise cancellation features are facilitated by accelerometer-based control of sidetone and/or active noise cancellation operations.

公开(公告)号：US20210074310A1

公开(公告)日：2021-03-11

申请号：US16785480

申请日：2020-02-07

Applicant: Apple Inc.

Inventor： Nicholas J. BRYAN ,  Qing YANG ,  Vasu IYENGAR

IPC: G10L21/0216 ,  H04R3/00

Abstract: A device implementing a system for mitigating noise includes at least one processor configured to receive a first audio signal corresponding to a first microphone, and determine whether wind noise is present based at least in part on the first audio signal. The processor is configured to select, based on the determining, a second audio signal from between second and third microphones. The second microphone is disposed at a location that experiences less echo coupling when the device is in a particular orientation with respect to a user. The third microphone is disposed at another location that experiences less wind noise. The processor is configured to determine voice and noise reference values based on the first and the selected second audio signals, and perform noise suppression with respect to at least one of the first or the selected second audio signal, based on the voice or the noise reference value.

公开(公告)号：US20240144906A1

公开(公告)日：2024-05-02

申请号：US18409693

申请日：2024-01-10

Applicant: Apple Inc.

Inventor： Yang LU ,  Andrew P. BRIGHT ,  Fatos MYFTARI ,  Vasu IYENGAR

IPC: G10K11/178

CPC classification number: G10K11/17853

Abstract: Aspects of the subject technology provide for generation of a self-voice signal by an electronic device that is operating in an active noise cancellation mode. In this way, during a phone call, a video conference, or while listening to audio content, a user of the electronic device may benefit from active cancellation of ambient noise while still being able to hear their own voice when they speak. In various implementations described herein, the concurrent self-voice and automatic noise cancellation features are facilitated by accelerometer-based control of sidetone and/or active noise cancellation operations.

公开(公告)号：US20210390972A1

公开(公告)日：2021-12-16

申请号：US16899474

申请日：2020-06-11

Applicant: Apple Inc.

Inventor： Yang LU ,  Fatos MYFTARI ,  Vasu IYENGAR ,  Aram M. LINDAHL

IPC: G10L21/034 ,  G10L21/0208 ,  G10K11/178 ,  H04R1/10 ,  H03G3/30

Abstract: Aspects of the subject technology relate to a device including a microphone, a filter and a processor. The filter receives an audio signal including ambient noise and a voice of a user of the device from the microphone. At least a portion of ambient noise is filtered from the audio signal. The processor determines a level of the ambient noise in the received audio signal and dynamically adjusts a gain applied to the filtered audio signal based on the level of the ambient noise.

公开(公告)号：US20150341722A1

公开(公告)日：2015-11-26

申请号：US14286659

申请日：2014-05-23

Applicant: Apple Inc.

Inventor： Vasu IYENGAR ,  Martin E. JOHNSON ,  Ronald N. ISAAC ,  Aram M. LINDAHL

IPC: H04R3/00

CPC classification number: H04R3/005 ,  G10L2021/02082 ,  H04B3/23 ,  H04M9/082 ,  H04R3/04 ,  H04R2410/05 ,  H04R2499/11 ,  H04S7/305

Abstract: In one embodiment, a process for suppressing reverberation begins with a device of a user obtaining a reverberant speech signal from a voice of the user. The device determines a first estimated reverberation component of the reverberant speech signal. The device generates a first de-reverberated output signal with a first reverberation suppression based on the reverberant speech signal and the first estimated reverberation component. Then, the device generates a second improved reverberation component using the first de-reverberated output signal. The device generates a second de-reverberated output signal with a second reverberation suppression based on the reverberant speech signal and the second improved reverberation component.

Abstract translation: 在一个实施例中，用于抑制混响的过程开始于用户的设备从用户的语音获得混响语音信号。 该装置确定混响语音信号的第一估计混响分量。 该装置基于混响语音信号和第一估计混响分量产生具有第一混响抑制的第一去混响输出信号。 然后，该装置使用第一去混响输出信号产生第二改进的混响分量。 该装置基于混响语音信号和第二改进的混响分量产生具有第二混响抑制的第二去混响输出信号。