公开(公告)号：US20170280231A1

公开(公告)日：2017-09-28

申请号：US15513955

申请日：2015-09-29

Applicant: Apple Inc.

Inventor： Martin E. Johnson ,  Simon K. Porter ,  Suzanne Hardy ,  John H. Sheerin

IPC: H04R1/28 ,  H04R1/02 ,  H04R1/40

CPC classification number: H04R1/2811 ,  H04R1/02 ,  H04R1/025 ,  H04R1/26 ,  H04R1/2803 ,  H04R1/288 ,  H04R1/403 ,  H04R3/14 ,  H04R2201/401

Abstract: Loudspeakers are described that may reduce comb filtering effects perceived by a listener by either 1) moving transducers closer to a sound reflective surface (e.g., a baseplate, a tabletop or a floor) through vertical (height) or rotational adjustments of the transducers or 2) guiding sound produced by the transducers to be released into the listening area proximate to the reflective surface through the use of horns and openings that are at a prescribed distance from the reflective surface. The reduction of this distance between the reflective surface and the point at which sound emitted by the transducers is released into the listening area may lead to shorter reflected path that reduces comb filtering effects caused by reflected sounds that are delayed relative to the direct sound. Accordingly, the loudspeakers shown and described may be placed on reflective surfaces without severe audio coloration caused by reflected sounds.

公开(公告)号：US20170272886A1

公开(公告)日：2017-09-21

申请号：US15504314

申请日：2014-08-18

Applicant: Apple Inc.

Inventor： Afrooz Family ,  Martin E. Johnson ,  Baptiste P. Paquier

IPC: H04S7/00 ,  H04R5/02

CPC classification number: H04S7/301 ,  G06T7/70 ,  G06T2207/10016 ,  H04R5/02 ,  H04R2205/022 ,  H04R2205/024 ,  H04R2227/007 ,  H04S7/305 ,  H04S2400/11

Abstract: An audio system is provided that efficiently detects speaker arrays and configures the speaker arrays to output sound. In this system, a computing device may record the addresses and/or types of speaker arrays on a shared network while a camera captures video of a listening area, including the speaker arrays. The captured video may be analyzed to determine the location of the speaker arrays, one or more users, and/or the audio source in the listening area. While capturing the video, the speaker arrays may be driven to sequentially emit a series of test sounds into the listening area and a user may be prompted to select which speaker arrays in the captured video emitted each of the test sounds. Based on these inputs from the user, the computing device may determine an association between the speaker arrays on the shared network and the speaker arrays in the captured video.

公开(公告)号：US09763008B2

公开(公告)日：2017-09-12

申请号：US14773256

申请日：2014-03-06

Applicant: Apple Inc.

Inventor： Martin E. Johnson ,  Tomlinson Holman

IPC: H03G5/00 ,  H04R5/04 ,  H04R29/00 ,  H04S7/00 ,  H04R1/40 ,  H04R5/02 ,  H04S3/00

CPC classification number: H04R5/04 ,  H04R1/403 ,  H04R5/02 ,  H04R29/002 ,  H04R2201/401 ,  H04R2201/403 ,  H04R2203/12 ,  H04R2227/007 ,  H04S3/008 ,  H04S7/301 ,  H04S7/305 ,  H04S7/307 ,  H04S2400/01 ,  H04S2400/15

Abstract: A system and method for driving a loudspeaker array across directivities and frequencies to maintain timbre constancy in a listening area is described. In one embodiment, a frequency independent room constant describing the listening area is determined using the directivity index of a first beam pattern, the direct-to-reverberant ratio DR at the listener's location in the listening area, and an estimated reverberation time T60 for the listening area at a designated frequency. On the basis of this room constant, an offset may be generated for a second beam pattern. The offset describes the decibel difference between first and second beam patterns to achieve constant timbre and may be used to adjust the second beam pattern at multiple frequencies. Maintaining constant timbre improves audio quality regardless of the characteristics of the listening area and the beam patterns used to represent sound program content. Other embodiments are also described.

公开(公告)号：US09699558B2

公开(公告)日：2017-07-04

申请号：US13712327

申请日：2012-12-12

Applicant: Apple Inc.

Inventor： Girault W. Jones ,  Nathan A. Johanningsmeier ,  Martin E. Johnson

IPC: H04R1/40 ,  H03M1/66 ,  H04R3/12 ,  H04S3/00

CPC classification number: H04R3/12 ,  H04S3/008

Abstract: A multi-channel audio system that can provide a variable sub-sample delay between two or more audio channels. In one embodiment, a variable timing clock generator generates multiple clock signals where each may have different phase, and the clock generator can vary the phase difference, in accordance with a sub-sample delay setting input. These clock signals are used by respective digital-to-analog converters (DACs) to convert the digital audio channels into analog form. In another embodiment, a variable delay block is added to an oversampling DAC, on a per channel basis. Other embodiments are also described and claimed.

公开(公告)号：US20150023533A1

公开(公告)日：2015-01-22

申请号：US14507582

申请日：2014-10-06

Applicant: Apple Inc.

Inventor： Martin E. Johnson ,  Ruchi Goel ,  Darby E. Hadley

IPC: H04R3/12 ,  H04S1/00

CPC classification number: H04R3/12 ,  H04R5/04 ,  H04R2430/01 ,  H04R2499/11 ,  H04S1/00

Abstract: A method and apparatus for outputting audio based on an orientation of an electronic device, or video shown by the electronic device. The audio may be mapped to a set of speakers using either or both of the device and video orientation to determine which speakers receive certain audio channels.

Abstract translation: 一种用于基于电子设备的取向或电子设备所示的视频来输出音频的方法和装置。 可以使用设备和视频方向中的一个或两者来将音频映射到一组扬声器，以确定哪些扬声器接收某些音频通道。

公开(公告)号：US20140161279A1

公开(公告)日：2014-06-12

申请号：US13712327

申请日：2012-12-12

Applicant: APPLE INC.

Inventor： Girault W. Jones ,  Nathan A. Johanningsmeier ,  Martin E. Johnson

IPC: H04R3/12

CPC classification number: H04R3/12 ,  H04S3/008

Abstract: A multi-channel audio system that can provide a variable sub-sample delay between two or more audio channels. In one embodiment, a variable timing clock generator generates multiple clock signals where each may have different phase, and the clock generator can vary the phase difference, in accordance with a sub-sample delay setting input. These clock signals are used by respective digital-to-analog converters (DACs) to convert the digital audio channels into analog form. In another embodiment, a variable delay block is added to an oversampling DAC, on a per channel basis. Other embodiments are also described and claimed.

Abstract translation: 可以在两个或多个音频通道之间提供可变子采样延迟的多声道音频系统。 在一个实施例中，可变定时时钟发生器产生多个时钟信号，其中每个时钟信号可以具有不同的相位，并且时钟发生器可以根据子采样延迟设置输入来改变相位差。 这些时钟信号由相应的数模转换器（DAC）用于将数字音频通道转换为模拟形式。 在另一个实施例中，可变延迟块以每通道为基础被添加到过采样DAC。 还描述和要求保护其他实施例。