公开(公告)号：US20190179597A1

公开(公告)日：2019-06-13

申请号：US15834752

申请日：2017-12-07

申请人： POWERCHORD GROUP LIMITED

发明人： Graham TULL ,  Troels Bastholm ,  Mads Berre Eriksen ,  Kurt Heick Rasmussen ,  Jens Christian Lindof

IPC分类号： G06F3/16 ,  H04R3/12 ,  H04R3/04

CPC分类号： G06F3/165 ,  H04R3/04 ,  H04R3/12 ,  H04R5/02 ,  H04R27/00 ,  H04R2227/003 ,  H04R2420/07 ,  H04S7/301

摘要： Systems and techniques are provided for audio synchronization and delay estimation. Audio metadata including a first discrete Fourier transform representation may be received. An audio signal may be pre-processed. A second discrete Fourier transform representation may be generated from the pre-processed audio signal. A correlation result in a discrete Fourier transform representation may be generated based on an element-wise multiplication of the first and second discrete Fourier transform representations. An inverse Fourier transform may be performed on the correlation result in a discrete Fourier transform representation to generate a correlated signal including samples that may have a position and a value. A relative delay value may be determined based on the position of a sample having a value with the greatest magnitude. Playback of a second audio signal may be adjusted based on a current delay value adjusted based on the relative delay value.

公开(公告)号：US20190075414A1

公开(公告)日：2019-03-07

申请号：US16181213

申请日：2018-11-05

申请人： Sonos, Inc.

发明人： William H. Bush

IPC分类号： H04R29/00 ,  H04S7/00 ,  H04R3/00 ,  H03G3/32 ,  H03G5/16 ,  H04R3/04

CPC分类号： H04R29/002 ,  H03G3/32 ,  H03G5/165 ,  H04R3/00 ,  H04R3/04 ,  H04R29/00 ,  H04R2430/01 ,  H04S7/301 ,  H04S7/305

摘要： Techniques described herein may involve dynamically adjusting the equalization of multiple speakers in a playback device. An example implementation involves a playback device emitting, via a speaker, a first audio signal. While emitting the first audio signal, the playback device detects, via a microphone, data representing a second audio signal, the second audio signal comprising one or more reflections of the first audio signal as emitted by the speaker within a surrounding environment. The playback device determines a frequency response curve based on the second audio signal, the frequency response curve representing acoustic characteristics of a system comprising the playback device and the surrounding environment. The playback device determines filter coefficients based on a difference between the determined frequency response curve and a target frequency response curve, and applies the filter coefficients to one or more filters during playback of audio content by the playback device.

公开(公告)号：US20190075413A1

公开(公告)日：2019-03-07

申请号：US16181583

申请日：2018-11-06

申请人： Sonos, Inc.

发明人： Timothy Sheen ,  Aurelio Ramos

IPC分类号： H04R29/00 ,  H04S7/00 ,  H04S1/00 ,  H04R3/12 ,  H04R27/00 ,  H04R5/04 ,  G06F3/16 ,  H04R3/04 ,  H04R1/22 ,  H03G5/16 ,  H03G5/00 ,  H03G3/20

CPC分类号： H04R29/001 ,  G06F3/165 ,  H03G3/20 ,  H03G5/005 ,  H03G5/16 ,  H03G5/165 ,  H04R1/22 ,  H04R3/04 ,  H04R3/12 ,  H04R5/04 ,  H04R27/00 ,  H04R29/008 ,  H04R2227/005 ,  H04S1/007 ,  H04S7/301

摘要： Examples involve calibration of two synchronous playback groups. In an example implementation, a first playback device forms a first group with a second playback device. While formed into the first group, the first playback device plays back a first calibration sound contemporaneously with the second playback device. The first playback device forms a second group with a third playback device. While formed into the second group, the first playback device repeatedly plays back a second calibration sound contemporaneously with the third playback device. The first playback device receives data representing (i) first audio processing coefficients and (ii) second audio processing coefficients. The first playback devices applies the first audio processing coefficients to playback of audio content when formed into the first group and the second audio processing coefficients to playback of audio content when formed into the second group.

公开(公告)号：US20180359585A1

公开(公告)日：2018-12-13

申请号：US15996878

申请日：2018-06-04

申请人： Sonos, Inc.

发明人： Jonathan Downing ,  Timothy Sheen ,  Daniel Valente

IPC分类号： H04R29/00 ,  H04S7/00 ,  H03G5/16 ,  H04R1/32 ,  H04R3/04 ,  H04R27/00 ,  G10L25/06 ,  G06F3/16

CPC分类号： H04R29/007 ,  G06F3/165 ,  G10L25/06 ,  H03G5/16 ,  H03G5/165 ,  H04R1/32 ,  H04R3/04 ,  H04R27/00 ,  H04R29/001 ,  H04R29/008 ,  H04R2227/003 ,  H04R2227/005 ,  H04R2460/07 ,  H04S7/301 ,  H04S7/303

摘要： Examples described herein involve validating motion of a microphone during calibration of a playback device. An example implementation involves a control device receiving an indication that the control device will begin detecting audio signals emitted from playback devices as part of a calibration process. While the control device is detecting audio signals emitted from the playback devices, the control device receives a stream of motion data indicating movement of the control device. The control device processes a first subset of the stream of motion data to determine that the first subset of the stream of motion data indicates sufficient horizontal translation of the control device occurred. Based on determining that the first subset of the stream of motion data indicates sufficient horizontal translation of the control device, the control device processes a second subset of the stream of motion data.

公开(公告)号：US20180359581A1

公开(公告)日：2018-12-13

申请号：US15620705

申请日：2017-06-12

申请人： Genelec Oy

发明人： Aki MÄKIVIRTA ,  Jussi TIKKANEN ,  Juha URHONEN ,  Thomas LUND

IPC分类号： H04R29/00 ,  H04S7/00

CPC分类号： H04R29/001 ,  H04R29/008 ,  H04R2499/15 ,  H04S7/301

摘要： According to an exemplary aspect of the present invention, there is provided an apparatus comprising: at least one loudspeaker element, at least one processing core, at least one memory including computer program code, the at least one memory and the computer program configured to, with the at least one processing core, cause the apparatus to produce sound via the loudspeaker element, wherein the at least one processing core is configured to adjust the sound according to criteria stored in the at least one memory, wherein the criteria comprise a wide bandwidth roll-off using at least one parametric shelving filter.

公开(公告)号：US20180350341A1

公开(公告)日：2018-12-06

申请号：US16011900

申请日：2018-06-19

申请人： Apple Inc.

发明人： Simon K. PORTER ,  Sylvain J. CHOISEL ,  John C. STEWART

IPC分类号： G10K15/12 ,  H04R29/00 ,  H04R3/12

CPC分类号： G10K15/12 ,  G10K11/34 ,  H04R3/12 ,  H04R29/002 ,  H04R2201/401 ,  H04S7/301 ,  H04S7/305

摘要： A method for using a loudspeaker array that is housed in a loudspeaker cabinet to present audio content to a listener in a room includes receiving (1) an audio channel that includes audio content and (2) acoustical characteristics of the room. The method also produces (1) a first beamformer input signal from the audio channel and (2) a second beamformer input signal and a third beamformer input signal by decorrelating the audio channel and adjusting the audio channel in accordance with the acoustical characteristics of the room. The second and third beamformer input signals are different de-correlated versions of the audio channel. The method also generates driver signals from the first, second, and third beamformer input signals to drive the loudspeaker array to produce a main beam, a first ambient beam, and a second ambient beam, respectively. Other embodiments are also described and claimed.

公开(公告)号：US20180343533A1

公开(公告)日：2018-11-29

申请号：US15757939

申请日：2015-12-16

申请人： BANG & OLUFSEN A/S

发明人： Jakob DYREBY

IPC分类号： H04S7/00 ,  H04R3/04 ,  H04R5/02 ,  H04R5/04

CPC分类号： H04S7/301 ,  H04R3/04 ,  H04R3/12 ,  H04R5/02 ,  H04R5/04 ,  H04S7/303

摘要： A method for compensating for acoustic influence of a listening room on an acoustic output from an audio system including at least a left and a right loudspeaker, the method comprising determining a left frequency response and a right frequency response, designing left and right compensation filters, and during playback applying the left and right filters to left and right input signals. The method further includes determining mono and side responses and designing mono and side compensation filters, and, during playback, applying the mono compensation filter to a mono signal based on the left and right input signals, and applying the side compensation filter to a side signal based on the left and right input signals. The filters are thus combined to provide left and right output signals which have been left/right filtered and mono/side filtered.

公开(公告)号：US20180286129A1

公开(公告)日：2018-10-04

申请号：US15754551

申请日：2016-08-17

申请人： PCMS Holdings, Inc.

发明人： Tatu V. J. Harviainen

IPC分类号： G06T19/00 ,  G06F3/14 ,  H04L29/06 ,  G02B27/01

CPC分类号： G06T19/006 ,  G02B27/017 ,  G02B2027/0138 ,  G06F3/1423 ,  G06F3/1454 ,  G06F3/147 ,  H04L67/38 ,  H04S7/301 ,  H04S7/303 ,  H04S2400/11

摘要： Disclosed herein are systems and methods for configuring a multi-device digital experience. In an embodiment, the method includes presenting a first content portion of a digital experience via a wearable display device in an environment; presenting a second content portion of the digital experience via a first device in a set of one or more devices in the environment; capturing test-signal-output data presented by the first device, the test-signal-output data being captured by the wearable display device in the environment, the test-signal-output data being based on a test signal sent to the first device; estimating spatial-characteristic data of the first device based on the captured test-signal-output data; and modifying the presentation of the second content portion of the digital experience via the first device based on the estimated spatial-characteristic data of the first device.

公开(公告)号：US20180270599A1

公开(公告)日：2018-09-20

申请号：US15923741

申请日：2018-03-16

申请人： Yamaha Corporation

发明人： Hideaki SHIMADA

IPC分类号： H04S7/00 ,  H04S3/00 ,  H04R5/02 ,  G06T7/70

CPC分类号： H04S7/301 ,  G06T7/70 ,  H04R1/403 ,  H04R5/02 ,  H04R2201/403 ,  H04S3/008 ,  H04S7/303 ,  H04S7/308 ,  H04S2400/01

摘要： A speaker location identifying system includes a camera which acquires a photographed image. The speaker location system recognizes an image of a speaker included in the photographed image, specifies a position of the speaker, based on a position and size in the photographed image of the recognized speaker, and decides a parameter of an audio signal outputted to the speaker, based on the specified position of the speaker.

公开(公告)号：US10078135B1

公开(公告)日：2018-09-18

申请号：US15497139

申请日：2017-04-25

申请人： Intel Corporation

发明人： Matias Almada ,  Xintian Eddie Lin ,  Songnan Yang

IPC分类号： H04S1/00 ,  G01S11/14 ,  G10L19/008 ,  G01S11/16 ,  G02B27/01 ,  H04S3/00 ,  H04S7/00

CPC分类号： G01S11/16 ,  A61M2205/507 ,  G01S5/30 ,  G02B27/0093 ,  G02B27/017 ,  H04R29/001 ,  H04S1/007 ,  H04S3/008 ,  H04S7/301

摘要： Apparatuses, methods and storage medium associated with identifying a physical distance using audio channels are disclosed herein. In embodiments, an apparatus may include a microphone associated with a first audio channel of a plurality of audio channels and a radio receiver associated with a second different audio channel of the plurality of audio channels. The apparatus may include one or more processors, devices, and/or circuitry to identify an amount of time between times of receipt of first and second representations of a signal received via the microphone over the first audio channel and via the radio receiver over the second audio channel, respectively. The amount of time may be usable to identify a physical distance between references associated with a remote source of the first and second representations and the apparatus, respectively. Other embodiments may be disclosed or claimed.