公开(公告)号：US20180091922A1

公开(公告)日：2018-03-29

申请号：US15465540

申请日：2017-03-21

Applicant: Apple Inc.

Inventor： Darius A. Satongar ,  Afrooz Family ,  Sylvain J. Choisel ,  Juha O. Merimaa

IPC: H04S7/00 ,  H04R5/04 ,  H04R5/033

CPC classification number: H04S7/304 ,  G06F3/012 ,  H04R5/033 ,  H04R5/04 ,  H04R2420/07 ,  H04R2460/07 ,  H04S2400/01 ,  H04S2400/11 ,  H04S2420/01

Abstract: A binaural sound reproduction system, and methods of using the binaural sound reproduction system to dynamically re-center a frame of reference for a virtual sound source, are described. The binaural sound reproduction system may include a reference device, e.g., a mobile device, having a reference sensor to provide reference orientation data corresponding to a direction of the reference device, and a head-mounted device, e.g., headphones, having a device sensor to provide device orientation data corresponding to a direction of the head-mounted device. The system may use the reference orientation data to determine whether the head-mounted device is being used in a static or dynamic use case, and may adjust an audio output to render the virtual sound source in an adjusted source direction based on the determined use case. Other embodiments are also described and claimed.

公开(公告)号：US20180090150A1

公开(公告)日：2018-03-29

申请号：US15275312

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Juha O. Merimaa ,  Bruce C. Po ,  Adam E. Kriegel

IPC: G10L19/008 ,  H04S7/00

CPC classification number: G10L19/008 ,  H03G5/00 ,  H03G5/165 ,  H04S3/002 ,  H04S3/008 ,  H04S5/00 ,  H04S7/30 ,  H04S2400/01

Abstract: Ambience extraction from a multichannel input signal is provided. The multichannel input signal is converted into a time-frequency representation. A cross-correlation coefficient is computed for each time and frequency in the time-frequency representation of the multichannel input signal. An autocorrelation is computed for each time and frequency in the time-frequency representation of the multichannel input signal. Using the cross-correlation coefficient and the autocorrelation, ambience extraction coefficients including crosstalk and same-side coefficients are computed as a function of a tuning parameter, the crosstalk coefficients being proportional to the tuning parameter and the tuning parameter being between a value of 0 and a value of 1. The ambience extraction coefficients are applied to extract a left ambience component and a right ambience component.

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：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。