公开(公告)号：US09432787B2

公开(公告)日：2016-08-30

申请号：US15019521

申请日：2016-02-09

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy ,  David T. Yeh ,  Juha O. Merimaa ,  Sean A. Ramprashad

IPC: H04R29/00 ,  H04R3/00

CPC classification number: H04R29/005 ,  H04R3/00 ,  H04R29/004 ,  H04R2499/11

Abstract: Systems and methods for determining the operating condition of multiple microphones of an electronic device are disclosed. A system can include a plurality of microphones operative to receive signals, a microphone condition detector, and a plurality of microphone condition determination sources. The microphone condition detector can determine a condition for each of the plurality of microphones by using the received signals and accessing at least one microphone condition determination source.

Abstract translation: 公开了用于确定电子设备的多个麦克风的操作条件的系统和方法。 系统可以包括可操作以接收信号的多个麦克风，麦克风条件检测器和多个麦克风条件确定源。 麦克风条件检测器可以通过使用接收到的信号并访问至少一个麦克风条件确定源来确定多个麦克风中的每一个的条件。

公开(公告)号：US20160211817A1

公开(公告)日：2016-07-21

申请号：US14602001

申请日：2015-01-21

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy

IPC: H03G3/02

CPC classification number: H03G3/02 ,  H03G3/3005 ,  H03G3/32 ,  H03G9/025

Abstract: Method of dynamically adapting playback volume on electronic device starts with processor receiving first user input and first portion of audio content. First user input signals to device to increase or decrease volume of sound output. Processor determines first loudness metric corresponding to first portion of audio content when first user input is received. First loudness metric is measure of loudness of first portion of audio content being outputted. Processor then stores in memory first loudness metric in association with first user input. Memory stores history of loudness metrics in association with user inputs. Processor then determines second loudness metric that is measure of loudness of second portion of audio content that is received and determines second user input associated with second loudness metric using history. Processor generates control signal to automatically control volume of sound output by device corresponding to second user input. Other embodiments are also described.

Abstract translation: 在电子设备上动态地适应播放音量的方法从处理器接收第一用户输入和音频内容的第一部分开始。 第一个用户输入信号到设备，以增加或减少声音输出的音量。 当接收到第一用户输入时，处理器确定与音频内容的第一部分对应的第一响度度量。 第一响度度量是输出的音频内容的第一部分的响度的度量。 然后处理器与第一用户输入相关联地存储在存储器中的第一响度度量。 内存存储与用户输入相关联的响度度量的历史。 然后处理器确定作为接收的音频内容的第二部分的响度的度量的第二响度度量，并且确定与使用历史的第二响度度量相关联的第二用户输入。 处理器产生控制信号，以自动控制与第二用户输入相对应的设备输出的音量。 还描述了其它实施例。

公开(公告)号：US09386371B2

公开(公告)日：2016-07-05

申请号：US13790666

申请日：2013-03-08

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy ,  Sean A. Ramprashad

IPC: H04B15/00 ,  H04R3/00 ,  G10L21/0324 ,  H04R5/04

CPC classification number: H04R3/002 ,  G10L21/0324 ,  H04R3/00 ,  H04R5/04

Abstract: Improved systems and methods for psychoacoustic adaptive notch filtering are provided. By accounting for psychoacoustic properties of an audio signal as well as finer characteristics of noise which may be present in the audio signal (e.g., the shape of the spectral density of the noise), more effective strategies for dealing with undesirable components of the audio signal may be realized.

Abstract translation: 提供了用于心理声学自适应陷波滤波的改进的系统和方法。 通过考虑音频信号的心理声学特性以及可能存在于音频信号中的更精细的噪声特性（例如，噪声的频谱密度的形状），用于处理音频信号的不期望的分量的更有效的策略 可以实现。

公开(公告)号：US09306525B2

公开(公告)日：2016-04-05

申请号：US13802131

申请日：2013-03-13

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy ,  Andrew P. Bright ,  Joseph M. Williams

IPC: H03G11/00 ,  H03G7/00

CPC classification number: H03G11/00 ,  H03G7/002 ,  H03G7/007

Abstract: Apparatuses, methods, computer readable mediums, and systems are described for combined dynamic processing and speaker protection for minimizing distortion in audio playback. In some embodiments, at least one compressed audio signal is received, at least one threshold for a speaker is retrieved, modifications to audio signal compression are determined based on the at least one compressed audio signal and the at least one threshold, information embodying the modifications is transmitted to a dynamic processor, and using the dynamic processor, at least one modified compressed audio signal is produced for the speaker based on the information.

Abstract translation: 描述了组合动态处理和扬声器保护的装置，方法，计算机可读介质和系统，以最小化音频回放中的失真。 在一些实施例中，接收至少一个压缩音频信号，检索到扬声器的至少一个阈值，基于至少一个压缩音频信号和至少一个阈值来确定对音频信号压缩的修改，体现该修改的信息 被发送到动态处理器，并且使用动态处理器，基于该信息为扬声器产生至少一个修改的压缩音频信号。

公开(公告)号：US09917562B2

公开(公告)日：2018-03-13

申请号：US15175970

申请日：2016-06-07

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy ,  Juha O. Merimaa ,  Kapil Krishnamurthy ,  Yuchao Song

IPC: H03G3/30 ,  H03G3/20

CPC classification number: H03G3/3005 ,  H03G3/20 ,  H03G3/3089

Abstract: Automatic gain control systems disclosed herein can incorporate a confidence metric that can estimate the accuracy of gain adjustments calculated by an automatic gain control module. The confidence metric may be based on a percentage of valid audio samples in a given period of time. Based on the confidence metric, the AGC response may be reduced, delayed, frozen, or otherwise altered from the baseline gain adjustment. Time-averaging process may be used to estimate the input signal power level and determine an appropriate baseline gain adjustment. Additionally, weighting functions can be adjusted to prevent overestimation of the signal power.

公开(公告)号：US20160358619A1

公开(公告)日：2016-12-08

申请号：US14732715

申请日：2015-06-06

Applicant: Apple Inc.

Inventor： Sean A. Ramprashad ,  Harvey D. Thornburg ,  Arvindh Krishnaswamy ,  Aram M. Lindahl

IPC: G10L21/0308 ,  G10L15/34 ,  G10L15/16

CPC classification number: G10L15/34 ,  G10L15/16 ,  G10L15/20 ,  G10L2015/022 ,  G10L2021/02166

Abstract: A speech recognition system for resolving impaired utterances can have a speech recognition engine configured to receive a plurality of representations of an utterance and concurrently to determine a plurality of highest-likelihood transcription candidates corresponding to each respective representation of the utterance. The recognition system can also have a selector configured to determine a most-likely accurate transcription from among the transcription candidates. As but one example, the plurality of representations of the utterance can be acquired by a microphone array, and beamforming techniques can generate independent streams of the utterance across various look directions using output from the microphone array.

Abstract translation: 用于解决受损话语的语音识别系统可以具有语音识别引擎，其被配置为接收话语的多个表示，并且同时确定与发音的每个相应表示相对应的多个最高似然转录候选。 识别系统还可以具有选择器，其被配置为确定转录候选物中最可能的精确转录。 作为一个示例，可以通过麦克风阵列来获取话音的多个表示，并且波束成形技术可以使用来自麦克风阵列的输出在各种外观方向上产生独立的话音流。

公开(公告)号：US09508357B1

公开(公告)日：2016-11-29

申请号：US14550868

申请日：2014-11-21

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy

IPC: G10L21/02

CPC classification number: G10L21/02 ,  G10L21/0216 ,  G10L2021/02166

Abstract: Apparatus for optimizing beamformers for echo control comprises microphones to receive acoustic signals, echo cancellers (ECs) respectively coupled to the microphones to adaptively cancel echo in the acoustic signals and to generate EC-acoustic signals, and a first fixed beamformer coupled to the ECs to receive the EC-acoustic signals. The null of the first beamformer is steered in a direction of a first environmental noise source that is determined offline by exciting the ECs with normal speech signals and audio playback signals to cause the ECs to generate test EC-acoustic signals, and selecting the first environmental noise source based on loudness weighted centroids of noise in the test EC-acoustic signals. Apparatus may also include a residual echo suppressor coupled to the first fixed beamformer to perform echo suppression on output of the first fixed beamformer and to generate clean signal. Other embodiments are also described.

Abstract translation: 用于优化用于回波控制的波束形成器的装置包括用于接收声信号的麦克风，分别耦合到麦克风的回波消除器（EC），以自适应地消除声信号中的回波并产生EC声信号，以及耦合到EC的第一固定波束形成器 接收EC声信号。 第一波束成形器的零点在第一环境噪声源的方向上被引导，该第一环境噪声源通过用正常语音信号和音频重放信号激发EC来离线地确定，以使EC产生测试EC-声信号，并且选择第一环境 噪声源基于测试EC声学信号中噪声的响度加权质心。 装置还可以包括耦合到第一固定波束形成器的残余回波抑制器，以对第一固定波束形成器的输出执行回波抑制并产生清洁信号。 还描述了其它实施例。

公开(公告)号：US09438195B2

公开(公告)日：2016-09-06

申请号：US14502997

申请日：2014-09-30

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy ,  Joseph M. Williams

IPC: H03G5/16 ,  H03G5/00

CPC classification number: H03G5/165 ,  H03G5/005

Abstract: An equalizer that linearly interpolates between two equalization states when transitioning from one equalization state to the other equalization state is described. The equalizer includes a transfer function generator and an equalization module. Each equalization state is defined or determined based on a set of parameters. The transfer function generator generates a set of interpolated transfer functions by performing linear interpolation on a first equalization state and a second equalization state based on the set of parameters. The linear interpolation is performed on corresponding Z-domain poles and zeros of the transfer functions of the first and second equalization states. The equalization module applies the set of interpolated transfer functions generated by the transfer function generator to an input audio signal.

Abstract translation: 描述了当从一个均衡状态转换到另一个均衡状态时在两个均衡状态之间线性内插的均衡器。 均衡器包括传递函数发生器和均衡模块。 基于一组参数来定义或确定每个均衡状态。 传递函数发生器通过基于该参数集在第一均衡状态和第二均衡状态上执行线性插值来生成一组内插传递函数。 在第一和第二均衡状态的传递函数的相应的Z域极点和零点上执行线性内插。 均衡模块将由传递函数发生器生成的内插传递函数集合应用于输入音频信号。

公开(公告)号：US09301073B2

公开(公告)日：2016-03-29

申请号：US13790380

申请日：2013-03-08

Applicant: Apple Inc.

Inventor： Arvindh Krishnaswamy ,  David T. Yeh ,  Juha O. Merimaa ,  Sean A. Ramprashad

IPC: H04R29/00

CPC classification number: H04R29/005 ,  H04R3/00 ,  H04R29/004 ,  H04R2499/11

Abstract: Systems and methods for determining the operating condition of multiple microphones of an electronic device are disclosed. A system can include a plurality of microphones operative to receive signals, a microphone condition detector, and a plurality of microphone condition determination sources. The microphone condition detector can determine a condition for each of the plurality of microphones by using the received signals and accessing at least one microphone condition determination source.

公开(公告)号：US20130329896A1

公开(公告)日：2013-12-12

申请号：US13790380

申请日：2013-03-08

Applicant: APPLE INC.

Inventor： Arvindh Krishnaswamy ,  David T. Yeh ,  Juha O. Merimaa ,  Sean A. Ramprashad

IPC: H04R29/00

CPC classification number: H04R29/005 ,  H04R3/00 ,  H04R29/004 ,  H04R2499/11

Abstract: Systems and methods for determining the operating condition of multiple microphones of an electronic device are disclosed. A system can include a plurality of microphones operative to receive signals, a microphone condition detector, and a plurality of microphone condition determination sources. The microphone condition detector can determine a condition for each of the plurality of microphones by using the received signals and accessing at least one microphone condition determination source.

Abstract translation: 公开了用于确定电子设备的多个麦克风的操作条件的系统和方法。 系统可以包括可操作以接收信号的多个麦克风，麦克风条件检测器和多个麦克风条件确定源。 麦克风条件检测器可以通过使用接收到的信号并访问至少一个麦克风条件确定源来确定多个麦克风中的每一个的条件。