Binaural And Stereophonic Patents (Class 381/1)
  • Patent number: 11405741
    Abstract: A method (900) for rendering audio in a virtual reality rendering environment (180) is described. The method (900) comprises rendering (901) an origin audio signal of an origin audio source (113) of an origin audio scene (111) from an origin source position on a sphere (114) around a listening position (201) of a listener (181). Furthermore, the method (900) comprises determining (902) that the listener (181) moves from the listening position (201) within the origin audio scene (111) to a listening position (202) within a different destination audio scene (112). In addition, the method (900) comprises applying (903) a fade-out gain to the origin audio signal to determine a modified origin audio signal, and rendering (903) the modified origin audio signal of the origin audio source (113) from the origin source position on the sphere (114) around the listening position (201, 202).
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: August 2, 2022
    Assignee: Dolby International AB
    Inventors: Leon Terentiv, Christof Fersch, Daniel Fischer
  • Patent number: 11399250
    Abstract: A digital audio array circuit is provided. The digital audio array circuit includes at least two digital audio units and a system master unit. Each of the digital audio units is configured to transform a received sound wave to a digital audio signal. Each of the digital audio units includes a left/right channel configuration input terminal. The system master unit is connected to the at least two digital audio units in time division multiplexing to receive the digital audio signals. The left/right channel configuration input terminal of each of the digital audio units is configured to receive a same synchronizing signal.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: July 26, 2022
    Assignee: Silicon Integrated Systems Corp.
    Inventors: Han-Ning Chen, Chien-Yu Chiang
  • Patent number: 11383158
    Abstract: A gaming unit and producing a game-audio output of a varying volume level and a chat-voice output is connected to headphones adapted to be worn by a player of the unit and connected to the gaming unit for making the chat-voice output and the game-audio output audible to the player. A circuit or software associated with the headphones can increase the chat-voice volume level generally proportionately to the game-audio volume level.
    Type: Grant
    Filed: March 1, 2022
    Date of Patent: July 12, 2022
    Assignee: Voyetra Turtle Beach, Inc.
    Inventor: Carmine J. Bonanno
  • Patent number: 11380337
    Abstract: A method for increasing stability of an inter-channel time difference (ICTD) parameter in parametric audio coding, wherein a multi-channel audio input signal comprising at least two channels is received. The method comprises obtaining an ICTD estimate, ICTDest(m), for an audio frame m and a stability estimate of said ICTD estimate, and determining whether the obtained ICTD estimate, ICTDest(m), is valid. If the ICTDest(m) is not found valid, and a determined sufficient number of valid ICTD estimates have been found in preceding frames, a hang-over time is determined using the stability estimate and a previously obtained valid ICTD parameter, ICTD(m?1), is selected as an output parameter, ICTD(m), during the hang-over time. The output parameter, ICTD(m), is set to zero if valid ICTDest(m) is not found during the hang-over time.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: July 5, 2022
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Erik Norvell, Tomas Jansson Toftgård
  • Patent number: 11363403
    Abstract: An apparatus including circuitry configured for: obtaining at least one spatial audio signal including at least one audio signal, wherein the at least one spatial audio signal defines an audio scene forming at least in part media content; rendering an audio scene based on the at least one spatial audio signal; obtaining at least one augmentation audio signal; transforming the at least one augmentation audio signal to at least two audio objects; augmenting the audio scene based on the at least two audio objects.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: June 14, 2022
    Assignee: Nokia Technologies Oy
    Inventor: Lasse Laaksonen
  • Patent number: 11363376
    Abstract: A speaker excursion characterizing system for a speaker includes a signal generator configured to generate a signal at a plurality of different amplitudes. The signal may be generated at a plurality of frequencies. An inverse excursion filter has an inverse excursion filter response, receives the signal and applies the inverse excursion filter response and has an output in communication with an amplifier circuit of the speaker. The inverse excursion filter response is an inverse of an excursion filter response of an excursion filter in the amplifier circuit of the speaker.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: June 14, 2022
    Assignee: Maxim Integrated Products, Inc.
    Inventor: Robert Polleros
  • Patent number: 11347475
    Abstract: A device for processing audio signals, including: first and second input units providing first and second input signals of first and second audio tracks, a decomposition unit to decompose the first input audio signal to obtain a plurality of decomposed signals, a playback unit configured to start playback of a first output signal obtained from recombining at least a first decomposed signal at a first volume level with a second decomposed signal at a second volume level, such that the first output signal substantially equals the first input signal, and a transition unit for performing a transition between playback of the first output signal and playback of a second output signal obtained from the second input signal. The transition unit has a volume control section adapted for reducing the first and second volume levels according to first and second transition functions.
    Type: Grant
    Filed: June 9, 2021
    Date of Patent: May 31, 2022
    Assignee: ALGORIDDIM GMBH
    Inventors: Kariem Morsy, Federico Tessmann, Christoph Teschner
  • Patent number: 11337003
    Abstract: Embodiments of this application provide an audio playback circuit and a terminal. The audio playback circuit includes: a first current path, configured to shunt a current output by a left-channel circuit to adjust a second voltage fed back to a first end of a right-channel headset when the left-channel circuit outputs a left-channel audio signal, where when the left-channel circuit outputs the left-channel audio signal and a right-channel circuit does not output a right-channel audio signal, the second voltage is equal to a voltage at a second end of a right-channel headset; and a second current path, configured to shunt a current output by the right-channel circuit to adjust a first voltage fed back to a first end of a left-channel headset when the right-channel circuit outputs the right-channel audio signal. The audio playback circuit in the embodiments of this application can improve isolation between a left channel and a right channel.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: May 17, 2022
    Assignee: HONOR DEVICE CO., LTD.
    Inventors: Ting Huang, Yupeng Qiu, Yingqun Feng
  • Patent number: 11315577
    Abstract: Exemplary embodiments provide encoding and decoding methods, and associated encoders and decoders, for encoding and decoding of an audio scene which is represented by one or more audio signals. The encoder generates a bit stream which comprises downmix signals and side information which includes individual matrix elements of a reconstruction matrix which enables reconstruction of the one or more audio signals in the decoder.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: April 26, 2022
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Lars Villemoes, Leif Jonas Samuelsson, Toni Hirvonen
  • Patent number: 11317233
    Abstract: An acoustic device includes: an imaging device configured to take a sample image of a space as a sound field and create an image data on the space based on the taken sample image; a sound collector configured to collect a sound generated in the space or to collect a previously-collected acoustic data therein; and a computation part configured to previously compute a plurality of parameters relevant to a coefficient of spatial acoustic filter corresponding to the sample image of the space and previously learn a sound field model of the space shown in the sample image. The computation part is configured to construct a sound field model of the sample image taken by the imaging device or of a previously-taken sample image, from the acoustic data collected by the sound collector, using the coefficient of spatial acoustic filter.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: April 26, 2022
    Assignee: CLEPSEADRA, INC.
    Inventors: Hideki Koike, Homare Kon
  • Patent number: 11308969
    Abstract: A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters from the bitstream. The method also includes analyzing the M audio channels to detect a location of a transient, decorrelating the M audio channels, and deriving N audio channels from the M audio channels and the set of spatial parameters. A first decorrelation technique is applied to a first subset of each audio channel and a second decorrelation technique is applied to a second subset of each audio channel. The first decorrelation technique represents a first mode of operation of a decorrelator, and the second decorrelation technique represents a second mode of operation of the decorrelator.
    Type: Grant
    Filed: October 5, 2020
    Date of Patent: April 19, 2022
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Mark F. Davis
  • Patent number: 11304020
    Abstract: Systems and methods can provide an elevated, virtual loudspeaker source in a three-dimensional soundfield using loudspeakers in a horizontal plane. In an example, a processor circuit can receive at least one height audio signal that includes information intended for reproduction using a loudspeaker that is elevated relative to a listener, and optionally offset from the listener's facing direction by a specified azimuth angle. A first virtual height filter can be selected for use based on the specified azimuth angle. A virtualized audio signal can be generated by applying the first virtual height filter to the at least one height audio signal. When the virtualized audio signal is reproduced using one or more loudspeakers in the horizontal plane, the virtualized audio signal can be perceived by the listener as originating from an elevated loudspeaker source that corresponds to the azimuth angle.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: April 12, 2022
    Assignee: DTS, Inc.
    Inventors: Jean-Marc Jot, Daekyoung Noh, Ryan James Cassidy, Themis George Katsianos, Oveal Walker
  • Patent number: 11301118
    Abstract: A method for securing a computer system comprising a step of: disguising a password entry screen.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: April 12, 2022
    Assignee: NOWWW.US Pty Ltd.
    Inventors: Mark Rodney Anson, Lance Roman-Miller
  • Patent number: 11304005
    Abstract: A crossover circuit, disposed within a sound producing device including a first sound producing cell driven by a first driving signal and a second sound producing cell driven by a second driving signal, includes a first filter receiving an input signal at an input terminal of the first filter, a first subtraction circuit, and a second filter coupled between the output terminal of the first filter and the second input terminal of the first subtraction circuit. A first input terminal of the first subtraction circuit is coupled to the input terminal of the first filter; a second input terminal of the first subtraction circuit is coupled to an output terminal of the first filter. The crossover circuit produces the first driving signal and the second driving signal according to a first output signal of the first subtraction circuit and a second output signal of the first filter respectively.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: April 12, 2022
    Assignee: xMEMS Labs, Inc.
    Inventors: Jemm Yue Liang, Hsi-Sheng Chen, Chiung C. Lo, Wen-Chien Chen, Chun-I Chang, Hao-Hsin Chang, Chieh-Yao Chang
  • Patent number: 11277683
    Abstract: An apparatus including circuitry configured to: provide a plurality of metrics associated with multiple directions, wherein the metrics are dependent, for the respective multiple directions, on an amount of direct-sound propagated; accumulate, for the respective multiple directions, values dependent upon the metrics associated with the respective multiple directions to enable determination of sound source directions.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: March 15, 2022
    Assignee: Nokia Technologies Oy
    Inventors: Hannu Pulakka, Matti Hamalainen, Mikko-Ville Laitinen
  • Patent number: 11264040
    Abstract: A method for rendering an audio output based on an audio data stream including M audio signals, side information including a series of reconstruction instances of a reconstruction matrix C and first timing data, the side information allowing reconstruction of N audio objects from the M audio signals, and object metadata defining spatial relationships between the N audio objects. The method includes generating a synchronized rendering matrix based on the object metadata, the first timing data, and information relating to a current playback system configuration, the synchronized rendering matrix having a rendering instance for each reconstruction instance, multiplying each reconstruction instance with a corresponding rendering instance to form a corresponding instance of an integrated rendering matrix, and applying the integrated rendering matrix to the audio signals in order to render an audio output.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: March 1, 2022
    Assignee: Dolby International AB
    Inventors: Klaus Peichl, Tobias Friedrich, Robin Thesing, Heiko Purnhagen, Martin Wolters
  • Patent number: 11259184
    Abstract: Systems and methods are disclosed for obfuscating entry of sensitive data at a mobile device, which may be infected with a rogue application configured to steal the sensitive data. One method comprises detecting a prompt for a user to enter sensitive data at a mobile device, and activating one or more of an audio speaker and a vibration motor of the mobile device. The activation of the one or more of the audio speaker and the vibration motor is terminated in response detection conclusion of the user's entry of sensitive data the mobile device.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: February 22, 2022
    Assignee: WORLDPAY, LLC
    Inventors: Daren L. Pickering, Jonathan S. Vokes, Marc Massar, Danny K. Russell
  • Patent number: 11252508
    Abstract: Embodiments relate to providing a conference for client devices with spatialized audio. Input audio streams are received from the client devices. For each client device, placement data defining spatial locations of other client devices within a sound field is determined. A mixed stream including a left mixed channel and a right mixed channel for the client device is generated by mixing and panning input audio streams of the other client devices according to the placement data. A spatially enhanced stream including a left enhanced channel for a left speaker and a right enhanced channel for a right speaker is generated by applying subband spatial processing and crosstalk processing on the left mixed channel and the right mixed channel of the mixed stream.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: February 15, 2022
    Assignee: Boomcloud 360 Inc.
    Inventor: Zachary Seldess
  • Patent number: 11246001
    Abstract: Embodiments provide methods, apparatuses, and systems for performing crosstalk cancellation and/or generation of virtual speakers. An audio processor may include a crosstalk cancellation circuit and a linearization circuit. The linearization circuit may offset the frequency response of the crosstalk cancellation circuit to provide an overall frequency response that is flat. A virtual speaker circuit may receive an input signal associated with an output channel and pass the input signal to the output channel unmodified. The virtual speaker circuit generates a virtualization signal based on the input signal and passes the virtualization signal to another physical channel. The virtualization signal may be generated further based on an ipsilateral head-related transfer function (HRTF) and a contralateral HRTF that correspond to a virtual speaker location of a virtual speaker generated by the virtual speaker circuit. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: February 8, 2022
    Assignee: THX Ltd.
    Inventor: Russell Gray
  • Patent number: 11245999
    Abstract: The present invention relates to a stereophonic service apparatus, its method of driving, and a computer readable recording medium. The stereophonic sound service apparatus according to an embodiment of the present invention may include the storage unit which matches and stores HRTF data related to a physical characteristic of a user and the sound source environment 3D data related to the sound source environment; and the control unit that extracts an HRTF candidate group from HRTF data stored based on a test result of a user for sound matching and setting at least one of data having a similarity value equal to or higher than a reference value as individualized data for each user.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: February 8, 2022
    Assignee: 'Digisonic Co. Ltd.
    Inventor: Ji-heon Kim
  • Patent number: 11206486
    Abstract: Embodiments relate to providing a conference for client devices with spatialized audio. Input audio streams are received from the client devices. For each client device, placement data defining spatial locations of other client devices within a sound field is determined. A mixed stream including a left mixed channel and a right mixed channel for the client device is generated by mixing and panning input audio streams of the other client devices according to the placement data. A spatially enhanced stream including a left enhanced channel for a left speaker and a right enhanced channel for a right speaker is generated by applying subband spatial processing and crosstalk processing on the left mixed channel and the right mixed channel of the mixed stream.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: December 21, 2021
    Assignee: Boomcloud 360 Inc.
    Inventor: Zachary Seldess
  • Patent number: 11184728
    Abstract: An audio decoder device for decoding a compressed input audio signal having at least one core decoder having one or more processors for generating a processor output signal based on a processor input signal, wherein a number of output channels of the processor output signal is higher than a number of input channels of the processor input signal, wherein each of the one or more processors has a decorrelator and a mixer, wherein a core decoder output signal having a plurality of channels has the processor output signal, and wherein the core decoder output signal is suitable for a reference loudspeaker setup; at least one format converter device configured to convert the core decoder output signal into an output audio signal, which is suitable for a target loudspeaker setup; and a control device configured to control at least one or more processors in such way that the decorrelator of the processor may be controlled independently from the mixer of the processor, wherein the control device is configured to contro
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: November 23, 2021
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Ertel, Johannes Hilpert, Andreas Hoelzer, Achim Kuntz, Jan Plogsties, Michael Kratschmer
  • Patent number: 11184969
    Abstract: Disclosed herein are example techniques to provide contextual information corresponding to a voice command. An example implementation may involve receiving voice data indicating a voice command, receiving contextual information indicating a characteristic of the voice command, and determining a device operation corresponding to the voice command. Determining the device operation corresponding to the voice command may include identifying, among multiple zones of a media playback system, a zone that corresponds to the characteristic of the voice command, and determining that the voice command corresponds to one or more particular devices that are associated with the identified zone. The example implementation may further involve causing the one or more particular devices to perform the device operation.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: November 23, 2021
    Assignee: Sonos, Inc.
    Inventors: Jonathan P. Lang, Romi Kadri, Christopher Butts
  • Patent number: 11178486
    Abstract: An electronic furniture assembly of the present invention comprises: (i) a furniture assembly comprising: (A) a base (e.g., a seat portion), (B) at least one transverse member (e.g., a side, armrest or backrest), and (C) a coupler for selectively coupling the base to the transverse member; and (ii) a speaker system mounted within one or more portions of the furniture assembly. The speaker system comprises one or more speakers mounted within the base and/or the transverse member, hiding the speakers therein, and saving space within a home or office, using the same footprint for both furniture and speakers, providing a high fidelity surround sound system.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: November 16, 2021
    Assignee: The Lovesac Company
    Inventors: Shawn Nelson, David Underwood, Brian Kuchler, Clint Gibson
  • Patent number: 11153686
    Abstract: Method for outputting an audio signal (S) into an interior (4) forming part of a passenger compartment (2) of a motor vehicle (3) via an acoustic output device (7) comprising a left and a right acoustic output channel (5, 6), comprising the steps: supplying an audio signal (S), splitting of the supplied audio signal (S) into a plurality of acoustic audio signal components (S.1-S.3) dependent on the direction of perception, mixing of each acoustic audio signal component (S.1-S.3) dependent on the direction of perception to a right and/or a left output channel (5, 6) of an acoustic output device (7) comprising a right and a left acoustic output channel (5, 6), output of the acoustic audio signal components (S.1-S.3) dependent on the direction of perception via the right and/or the left acoustic output channel (5, 6) of the acoustic output device (7).
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: October 19, 2021
    Assignee: ASK Industries GmbH
    Inventor: Daniel Kotulla
  • Patent number: 11140507
    Abstract: An apparatus comprising means for: obtaining an indication of a variable position of at least one user in real space; mapping the position of the user in real space to a position of the user in a sound space; controlling an output audio signal, for rendering a sound scene by a loudspeaker, the sound scene being defined by the one or more sound sources of the plurality of sound sources that are within a sub-volume of the sound space that excludes the position of the user in the sound space and that is sized in dependence upon the position of the user in the sound space.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: October 5, 2021
    Assignee: Nokia Technologies Oy
    Inventors: Jussi Leppänen, Miikka Vilermo, Arto Lehtiniemi, Antti Eronen
  • Patent number: 11140502
    Abstract: Various embodiments relate generally to electrical and electronic hardware, computer software, wired and wireless network communications, and audio and speaker systems. More specifically, disclosed are an apparatus and a method for processing signals for optimizing audio, such as 3D audio, by adjusting the filtering for cross-talk cancellation based on listener position and/or orientation. In one embodiment, an apparatus is configured to include a plurality of transducers, a memory, and a processor configured to execute instructions to determine a physical characteristic of a listener relative to the origination of the multiple channels of audio, to cancel crosstalk in a spatial region coincident with the listener at a first location, to detect a change in the physical characteristic of the listener, and to adjust the cancellation of crosstalk responsive to detecting the change in the physical characteristic to establish another spatial region at a second location.
    Type: Grant
    Filed: March 16, 2014
    Date of Patent: October 5, 2021
    Assignee: Jawbone Innovations, LLC
    Inventors: James Hall, Thomas Alan Donaldson
  • Patent number: 11134355
    Abstract: An audio content playback method for a portable terminal. The audio content playback method includes checking a channel that is supportable by audio content that is currently engaged in group's simultaneous playback, in group's simultaneous playback of the audio content. The method includes allocating a channel to each of devices included in a group based on position information of each device included in the group or based on an input state in a user interface environment that is preset for channel allocation for each device included in the group, and transmitting the allocated channel information to each device included in the group to allow the device to select its allocated channel and play the audio content.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: September 28, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Mi Lee, Kyu-Ok Choi, Ji-Hyun Um
  • Patent number: 11120807
    Abstract: A method for determining an audio coding mode and a related apparatus are provided. The method may include: determining a channel combination scheme for a current frame, where the determined channel combination scheme for the current frame is one of a plurality of channel combination schemes; and determining a coding mode of the current frame based on a channel combination scheme for a previous frame and the channel combination scheme for the current frame, where the coding mode of the current frame is one of a plurality of coding modes. The technical solutions provided in embodiments of this application help improve encoding quality.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: September 14, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Bin Wang, Haiting Li, Lei Miao
  • Patent number: 11096007
    Abstract: A method for processing a multichannel audio signal includes: obtaining at least one group of signals associated with a pair of channels comprising a left side signal, a left central signal, a right central signal and a right side signal determined from the left input signal and the right input signal; and performing differentiated sound stage filtering for the central signals on the one hand, and the side signals of each group of signals on the other hand, the differentiated sound stage filtering including the application, for each group of signals, of the central sound stage filter to the left central signal and to the right central signal of the group of signals.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: August 17, 2021
    Assignee: FAURECIA CLARION ELECTRONICS EUROPE
    Inventors: Grégory Olivier Kleinhans, Nicolas Lopez Zuleta
  • Patent number: 11051121
    Abstract: An audio system provides for spatial enhancement, crosstalk processing, and crosstalk compensation of an input audio signal. The crosstalk compensation compensates for spectral defects caused by the application of the crosstalk processing to a spatially enhanced signal. The crosstalk compensation may be performed prior to the crosstalk processing, after the crosstalk processing, or in parallel with the crosstalk processing. The crosstalk compensation includes applying filters to the mid and side components of the left and right input channels to compensate for spectral defects from crosstalk processing of the audio signal. The crosstalk processing may include crosstalk simulation or crosstalk cancellation. In some embodiments, the crosstalk compensation may be integrated with a subband spatial processing that spatially enhances the audio signal.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: June 29, 2021
    Assignee: Boomcloud 360, Inc.
    Inventor: Zachary Seldess
  • Patent number: 11044569
    Abstract: Systems, devices, apparatuses, components, methods, and techniques for providing media content to a media playback system are provided. The techniques provide for determining whether a playback system is connected, or otherwise associated with, a playback device suitable for 3D audio playback. Upon determining that a playback system is or is not connected or otherwise associated with a playback device suitable for 3D audio playback, audio content in a corresponding format may then be transferred and/or played by a requesting system. In some examples, one or more filters may be applied to requested audio content to compensate for determined user head movement and/or to create simulated 3D audio from generic two-channel recording.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: June 22, 2021
    Assignee: Spotify AB
    Inventor: Rachel Bittner
  • Patent number: 11039251
    Abstract: A signal processing device of an embodiment includes a measurement signal generation unit that generates a measurement signal to be output from the sound source, a sound pickup signal acquisition unit that acquires sound pickup signals picked up by a plurality of microphones, a sound source information acquisition unit that acquires sound source information about a horizontal angle of a sound source, filters that have a passband set based on the sound source information and output a filter passing signal in response to input of the sound pickup signals, a phase difference detection unit that detects a phase difference between two sound pickup signals based on the filter passing signal, and a determination unit that determines a result of measurement of the sound pickup signals by comparing the phase difference with an effective range set based on the sound source information.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: June 15, 2021
    Assignee: JVCKENWOOD CORPORATION
    Inventors: Takahiro Gejo, Hisako Murata, Yumi Fujii, Masaya Konishi, Kuniaki Takachi
  • Patent number: 11039244
    Abstract: Systems and methods for manual characterization of perceived transducer distortion are described. The system includes a signal generator, a controller, a multi-band compressor, and an audio transducer. The signal generator is configured to generate a test signal for a frequency band. The test signal includes at least two simultaneous frequency-modulated tones, which may be combined together in an amplitude-modulated envelope. The at least two simultaneous frequency-modulated tones have different frequencies within the frequency band. The controller is configured to receive user input indicating a gain value. The multi-band compressor is coupled to the signal generator. The multi-band compressor is configured to adjust an amplitude of a component of the test signal based on the gain value. The audio transducer is coupled to the multi-band compressor. The audio transducer is configured to generate an audio signal based on the test signal.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: June 15, 2021
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Timothy Alan Port, Sebastian P. B. Holzapfel, Juan Felix Torres
  • Patent number: 11039266
    Abstract: A method for producing a diffuse field that is non-localizable and without timbre inaccuracies. A processor receives an audio bitstream containing an at least one surround channel. The surround channel is rendered as an at least one virtualized line array source. Timbre correction is applied to the virtualized line array source. Other aspects are also described and claimed.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: June 15, 2021
    Assignee: APPLE INC.
    Inventors: Tomlinson Holman, Martin E. Johnson
  • Patent number: 11019447
    Abstract: Multiple virtual source locations may be defined for a volume within which audio objects can move. A set-up process for rendering audio data may involve receiving reproduction speaker location data and pre-computing gain values for each of the virtual sources according to the reproduction speaker location data and each virtual source location. The gain values may be stored and used during “run time,” during which audio reproduction data are rendered for the speakers of the reproduction environment. During run time, for each audio object, contributions from virtual source locations within an area or volume defined by the audio object position data and the audio object size data may be computed. A set of gain values for each output channel of the reproduction environment may be computed based, at least in part, on the computed contributions. Each output channel may correspond to at least one reproduction speaker of the reproduction environment.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: May 25, 2021
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Antonio Mateos Sole, Nicolas R. Tsingos
  • Patent number: 10993060
    Abstract: An acoustic signal processing device includes: a front signal processor which generates first L and R signals by performing signal processing on a first signal which is a front channel signal; a first adder which generates a fourth signal which is a left channel signal by adding the first L signal and a second signal which is a left channel signal; and a second adder which generates a fifth signal which is a right channel signal by adding the first R signal and a third signal which is a right channel signal. The front signal processor generates the first L and R signals by signal processing in which the first signal is distributed and placed at predetermined positions when the first signal is a dialog signal, and distributed and placed at positions different from the predetermined positions when the first signal is not a dialog signal.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: April 27, 2021
    Assignee: SOCIONEXT INC.
    Inventors: Shuji Miyasaka, Kazutaka Abe
  • Patent number: 10993029
    Abstract: An audio system on a headset presents audio content via tissue conduction to an inner ear of a first ear of a user. The system monitors, via one or more sensors on the headset, data about the presented audio content. The one or more sensors including at least one sensor configured to capture data about the presented audio content at a second ear of the user. The system estimates array transfer functions (ATFs) associated with the data, and generates sound filters for the transducer array using the estimated ATFs. The system presents adjusted audio content based in part on the sound filters. The adjusted audio content has a damped region at the second ear such that the amplitude of the adjusted audio content at the first ear has a higher amplitude than at the second ear.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: April 27, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Jacob Ryan Donley, Morteza Khaleghimeybodi
  • Patent number: 10979811
    Abstract: Circuitry can separate a multi-channel input signal into a center signal and a residual signal, apply time-varying center and residual gains to the center and residual signals, and combine the gain-adjusted center and residual signals to form a multi-channel audio signal. The center and residual gains are automatically determined in response to the center and residual signals so as to prevent each channel of the multi-channel audio signal from exceeding a target volume. During first times, the center and residual gains can vary synchronously so as to ensure that amplitude and phase relationships among channels in the multi-channel input signal are retained into the multi-channel audio signal. During second times, the center and residual gains can vary independently so as to reduce the energy of the residual signal compared to the center signal in the multi-channel audio signal.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: April 13, 2021
    Assignee: DTS, Inc.
    Inventors: Aaron Kube Warner, Daekyoung Noh, Michael Johns
  • Patent number: 10971163
    Abstract: Audio objects are associated with positional metadata. A received downmix signal comprises downmix channels that are linear combinations of one or more audio objects and are associated with respective positional locators. In a first aspect, the downmix signal, the positional metadata and frequency-dependent object gains are received. An audio object is reconstructed by applying the object gain to an upmix of the downmix signal in accordance with coefficients based on the positional metadata and the positional locators. In a second aspect, audio objects have been encoded together with at least one bed channel positioned at a positional locator of a corresponding downmix channel. The decoding system receives the downmix signal and the positional metadata of the audio objects. A bed channel is reconstructed by suppressing the content representing audio objects from the corresponding downmix channel on the basis of the positional locator of the corresponding downmix channel.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: April 6, 2021
    Assignee: Dolby International AB
    Inventors: Toni Hirvonen, Heiko Purnhagen, Leif Jonas Samuelsson, Lars Villemoes
  • Patent number: 10939220
    Abstract: The invention discloses rendering sound field signals, such as Higher-Order Ambisonics (HOA), for arbitrary loudspeaker setups, where the rendering results in highly improved localization properties and is energy preserving. This is obtained by rendering an audio sound field representation for arbitrary spatial loudspeaker setups and/or by a a decoder that decodes based on a decode matrix (D). The decode matrix (D) is based on smoothing and scaling of a first decode matrix {circumflex over (D)} with smoothing coefficients. The first decode matrix {circumflex over (D)} is based on a mix matrix G and a mode matrix {tilde over (?)}, where the mix matrix G was determined based on L speakers and positions of a spherical modelling grid related to a HOA order N, and the mode matrix {tilde over (?)} was determined based on the spherical modelling grid and the HOA order N.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: March 2, 2021
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Johannes Boehm, Florian Keiler
  • Patent number: 10939223
    Abstract: A method for producing a multi-channel audio signal from one or more sound object signals is disclosed, where, for each sound object signal a plurality of width signals is produced, the amplitudes of the width signals following a substantially Gaussian distribution. The width signals are processed to produce a plurality of pan signals which are mapped to at least one channel. Each channel in the audio signal is produced by combining the pan signals from each sound object. An apparatus for reproducing such a multi-channel audio signal is also disclosed, in which a plurality of first loudspeakers are provided spaced around a first arc forward of a predetermined listening zone, each of the first loudspeakers facing towards the listening zone and substantially equidistant therefrom. A plurality of second loudspeakers are provided spaced around a second arc behind the listening zone, each of the second loudspeakers facing towards the listening zone.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: March 2, 2021
    Assignee: L-ACOUSTICS UK LTD
    Inventor: Christian Heil
  • Patent number: 10917735
    Abstract: Embodiments relate to obtaining head-related transfer function (HRTF) through performing simulation using images of a user's head. The geometry of the user's head is determined based in part on one or more images of the user's head. The simulation of sound propagation from an audio source to the user's head is performed based on the generated geometry. The geometry may be represented in a three-dimensional meshes or principal component analysis (PCA)-based where the user's head is represented as a combination of representative three-dimensional shapes of test subjects' heads.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: February 9, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Antonio John Miller, Ravish Mehra
  • Patent number: 10904306
    Abstract: A system is provided for streaming media content in a vehicle. The system includes a personal media streaming appliance system configured to connect to a media delivery system and receive media content from the media delivery system at least via a cellular network. The personal media streaming appliance system operates to transmit a media signal representative to the received media content to a vehicle media playback system so that the vehicle media playback system operates to play the media content in the vehicle.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: January 26, 2021
    Assignee: Spotify AB
    Inventors: Mats Barvesten, Andreas Cedborg, Johan Oskarsson
  • Patent number: 10832689
    Abstract: A method for increasing stability of an inter-channel time difference (ICTD) parameter in parametric audio coding, wherein a multi-channel audio input signal comprising at least two channels is received. The method comprises obtaining an ICTD estimate, ICTDest(m), for an audio frame m and a stability estimate of said ICTD estimate, and determining whether the obtained ICTD estimate, ICTDest(m), is valid. If the ICTDest(m) is not found valid, and a determined sufficient number of valid ICTD estimates have been found in preceding frames, a hang-over time is determined using the stability estimate and a previously obtained valid ICTD parameter, ICTD (m?1), is selected as an output parameter, ICTD (m), during the hang-over time. The output parameter, ICTD (m), is set to zero if valid ICTDest(m) is not found during the hang-over time.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: November 10, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Erik Norvell, Tomas Jansson Toftgård
  • Patent number: 10827292
    Abstract: Various embodiments relate generally to electrical and electronic hardware, computer software, wired and wireless network communications, and audio and speaker systems. More specifically, disclosed are an apparatus and a method for processing signals for optimizing audio, such as 3D audio, by adjusting the filtering for cross-talk cancellation based on listener position and/or orientation. In one embodiment, an apparatus is configured to include a plurality of transducers, a memory, and a processor configured to execute instructions to determine a physical characteristic of a listener relative to the origination of the multiple channels of audio, to cancel crosstalk in a spatial region coincident with the listener at a first location, to detect a change in the physical characteristic of the listener, and to adjust the cancellation of crosstalk responsive to detecting the change in the physical characteristic to establish another spatial region at a second location.
    Type: Grant
    Filed: March 16, 2014
    Date of Patent: November 3, 2020
    Assignee: JAWB ACQUISITION LLC
    Inventors: James Hall, Thomas Alan Donaldson
  • Patent number: 10816391
    Abstract: At least one acoustic parameter of an environment is obtained by emitting a sound signal emitted, receiving a sound signal received, estimating a sampling frequency shift and of a temporal shift between the emission and reception devices on the basis of impulse responses obtained on the basis of portions of the sound signal received and of corresponding portions of the sound signal emitted, obtaining a corrected sound signal received by applying to the sound signal received a sampling frequency shift correction and a temporal shift correction on the basis of the estimating, determining the impulse response of the environment on the basis of portions of the corrected sound signal received and of corresponding portions of the sound signal emitted, and obtaining acoustic parameters of the environment on the basis of the impulse response.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: October 27, 2020
    Assignees: SAINT-GOBAIN ISOVER, SAINT-GOBAIN PLACO
    Inventors: Brice Dubost, Francois Sausset
  • Patent number: 10803848
    Abstract: An audio instrument includes a component assembly, a pan-tilt mechanism, and one or more processors. The component assembly includes a parabolic reflector, an audio device, and a sensor unit. The audio device is configured to one or more of receive or transmit sound waves via a transducer element disposed within a communication envelope of the parabolic reflector. The sensor unit includes a distance measurement sensor. The pan-tilt mechanism orients the component assembly at independent angular rotations about two orthogonal axes relative to a support platform. The one or more processors are configured to control the pan-tilt mechanism to orient the component assembly such that a central axis of the parabolic reflector is aimed towards a specific three-dimensional location for targeted audio communication between the audio device and a target at the specific three-dimensional location.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: October 13, 2020
    Assignee: THE BOEING COMPANY
    Inventor: James J. Troy
  • Patent number: 10805726
    Abstract: An audio system with first and second discrete audio drivers that are in a listening space, wherein each driver is configured to radiate sound into the listening space, and wherein the radiated sound from each driver at a listening location in the listening space has a frequency, phase, and magnitude. The audio system is configured to modify a phase of the sound radiated by at least one of the first or second drivers such that a phase response difference between the first and second drivers at the listening location is closer to zero degrees than it was before the modification.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: October 13, 2020
    Assignee: Bose Corporation
    Inventors: Colin Ryan, Joseph Gaalaas, Geun Lee, Michael McHugh, Nabin Sharma, David Smith, Michael Stark, James Tracey, Dmitriy Yamkovoy
  • Patent number: 10805758
    Abstract: Headphones provide binaural sound to a location behind a portable electronic device. The sound is convolved or processed to a location that is behind the portable electronic device so that the listener perceives the location of the sound as originating from the location of the portable electronic device.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: October 13, 2020
    Inventors: Glen A. Norris, Philip Scott Lyren