公开(公告)号：US12087310B2

公开(公告)日：2024-09-10

申请号：US17148638

申请日：2021-01-14

Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

Inventor： Arne Borsum ,  Stephan Schreiner ,  Harald Fuchs ,  Michael Kratz ,  Bernhard Grill ,  Sebastian Scharrer

IPC: G10L19/008 ,  G10L19/02 ,  G10L19/16 ,  H04S3/00 ,  H04S3/02 ,  H04S5/00

CPC classification number: G10L19/008 ,  G10L19/02 ,  G10L19/173 ,  H04S3/002 ,  H04S3/02 ,  H04S5/005 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/03

Abstract: An apparatus for downmixing three or more audio input channels to obtain two or more audio output channels is provided. The apparatus includes a receiving interface for receiving the three or more audio input channels and for receiving side information. Moreover, the apparatus includes a downmixer for downmixing the three or more audio input channels depending on the side information to obtain the two or more audio output channels. The number of the audio output channels is smaller than the number of the audio input channels. The side information indicates a characteristic of at least one of the three or more audio input channels, or a characteristic of one or more sound waves recorded within the one or more audio input channels, or a characteristic of one or more sound sources which emitted one or more sound waves recorded within the one or more audio input channels.

公开(公告)号：US20240259744A1

公开(公告)日：2024-08-01

申请号：US18591517

申请日：2024-02-29

Applicant: Nokia Technologies Oy

Inventor： Mikko-Ville LAITINEN ,  Lasse LAAKSONEN ,  Juha VILKAMO

IPC: H04S3/02 ,  G10L19/008

CPC classification number: H04S3/02 ,  G10L19/008 ,  H04S2400/01 ,  H04S2420/11

Abstract: An apparatus configured to: obtain at least one signal, wherein the at least one signal comprises one or more transport audio signals; obtain an indicator specifying a type of the one or more transport audio signals; and process the one or more transport audio signals based, at least partially, on the indicator to generate one or more processed transport audio signals that are of an at least partially different type than the type of the one or more transport audio signals.

公开(公告)号：US12010501B2

公开(公告)日：2024-06-11

申请号：US17521762

申请日：2021-11-08

Applicant: DOLBY INTERNATIONAL AB

Inventor： Johannes Boehm ,  Florian Keiler

IPC: H04S3/00 ,  G10L19/00 ,  H04S1/00 ,  H04S3/02 ,  H04S7/00

CPC classification number: H04S3/008 ,  G10L19/00 ,  H04S1/002 ,  H04S1/007 ,  H04S3/02 ,  H04S7/30 ,  H04S2400/01 ,  H04S2400/11 ,  H04S2420/11

Abstract: Decoding of Ambisonics representations for a stereo loudspeaker setup is known for first-order Ambisonics audio signals. But such first-order Ambisonics approaches have either high negative side lobes or poor localisation in the frontal region. The invention deals with the processing for stereo decoders for higher-order Ambisonics HOA.

公开(公告)号：US20240171925A1

公开(公告)日：2024-05-23

申请号：US18430118

申请日：2024-02-01

Applicant: Voyetra Turtle Beach, Inc.

Inventor： Kevin Arthur Robertson ,  David Gallagher ,  Nicholas Richard Bourne

IPC: H04S3/02 ,  G09G5/00 ,  H04L67/00 ,  H04L67/08 ,  H04N21/436 ,  H04N21/439 ,  H04R1/10 ,  H04S3/00 ,  H04S7/00

CPC classification number: H04S3/02 ,  G09G5/006 ,  H04L67/00 ,  H04L67/08 ,  H04L67/34 ,  H04N21/43615 ,  H04N21/439 ,  H04R1/1041 ,  H04R2420/09 ,  H04S3/004 ,  H04S7/307

Abstract: In an audio system that includes at least one audio output element for outputting audio signals, one or more audio settings, from a plurality of audio settings supported in the audio system, may be determined based on a selected audio mode supported in the audio system and mapping data. The mapping data defines, for at least the selected audio mode, valid values for at least one audio setting. At least one user control element may be configured to enable a user input that includes a selection for the one or more audio settings, with the configuring including adjusting operation of the at least one user control element, and the adjusting including enabling for selection or setting, via the at least one user control element, values for the user input that match or correspond to only the valid values for the at least one audio setting.

公开(公告)号：US20240147173A1

公开(公告)日：2024-05-02

申请号：US18487280

申请日：2023-10-16

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alexander KRUEGER ,  Sven KORDON ,  Johannes BOEHM ,  Johann-Markus BATKE

IPC: H04S3/00 ,  G10L19/008 ,  G10L19/20 ,  H04H20/89

CPC classification number: H04S3/008 ,  G10L19/008 ,  G10L19/20 ,  H04H20/89 ,  H04S3/02

Abstract: A method and apparatus for decompressing a Higher Order Ambisonics (HOA) signal representation is disclosed. The apparatus includes an input interface that receives an encoded directional signal and an encoded ambient signal and an audio decoder that perceptually decodes the encoded directional signal and encoded ambient signal to produce a decoded directional signal and a decoded ambient signal, respectively. The apparatus further includes an extractor for obtaining side information related to the directional signal and an inverse transformer for converting the decoded ambient signal from a spatial domain to an HOA domain representation of the ambient signal. The apparatus also includes a synthesizer for recomposing a Higher Order Ambisonics (HOA) signal from the HOA domain representation of the ambient signal and the decoded directional signal. The side information includes a direction of the directional signal selected from a set of uniformly spaced directions.

公开(公告)号：US20240121567A1

公开(公告)日：2024-04-11

申请号：US18525910

申请日：2023-12-01

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ERIK G.P. SCHUIJERS

IPC: H04S5/00 ,  G10L19/008 ,  H04S3/02

CPC classification number: H04S5/00 ,  G10L19/008 ,  H04S3/02 ,  H04S2400/03 ,  H04S2420/03

Abstract: A parametric stereo upmix method for generating a left signal and a right signal from a mono downmix signal based on spatial parameters includes predicting a difference signal comprising a difference between the left signal and the right signal based on the mono downmix signal scaled with a prediction coefficient. The prediction coefficient is derived from the spatial parameters. The method further includes deriving the left signal and the right signal based on a sum and a difference of the mono downmix signal and said difference signal.

公开(公告)号：US20240114307A1

公开(公告)日：2024-04-04

申请号：US18465636

申请日：2023-09-12

Applicant: DOLBY INTERNATIONAL AB ,  DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Stefan BRUHN

IPC: H04S3/02

CPC classification number: H04S3/02 ,  H04S2400/03

Abstract: There is provided encoding and decoding methods for representing spatial audio that is a combination of directional sound and diffuse sound. An exemplary encoding method includes inter alia creating a single- or multi-channel downmix audio signal by downmixing input audio signals from a plurality of microphones in an audio capture unit capturing the spatial audio; determining first metadata parameters associated with the downmix audio signal, wherein the first metadata parameters are indicative of one or more of: a relative time delay value, a gain value, and a phase value associated with each input audio signal; and combining the created downmix audio signal and the first metadata parameters into a representation of the spatial audio.

公开(公告)号：US20240114306A1

公开(公告)日：2024-04-04

申请号：US17683762

申请日：2020-09-02

Applicant: Dolby Laboratories Licensing Corporation

Inventor： David S. MCGRATH

IPC: H04S3/02 ,  H04S5/00

CPC classification number: H04S3/02 ,  H04S5/005

Abstract: An multi-input, multi-output audio process is implemented as a linear system for use in an audio filterbank to convert a set of frequency-domain input audio signals into a set of frequency-domain output audio signals. A transfer function from one input to one output is defined as a frequency dependent gain function. In some implementations, the transfer function includes a direct component that is substantially defined as a frequency dependent gain, and one or more decorrelated components that have frequency-varying group phase response. The transfer function is formed from a set of sub-band functions, with each sub-band function being formed from a set of corresponding component transfer functions including direct component and one or more decorrelated components.

公开(公告)号：US11894003B2

公开(公告)日：2024-02-06

申请号：US18167204

申请日：2023-02-10

Applicant: DOLBY INTERNATIONAL AB

Inventor： Toni Hirvonen ,  Heiko Purnhagen ,  Leif Jonas Samuelsson ,  Lars Villemoes

IPC: G10L19/00 ,  G10L19/008 ,  G10L19/20 ,  H04S5/00 ,  H04S7/00 ,  G10L19/02 ,  G10L25/06 ,  H04S3/00 ,  H04S3/02

CPC classification number: G10L19/008 ,  G10L19/0204 ,  G10L19/20 ,  G10L25/06 ,  H04S3/008 ,  H04S3/02 ,  H04S5/00 ,  H04S7/30 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/03

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.

公开(公告)号：US20240007814A1

公开(公告)日：2024-01-04

申请号：US18237618

申请日：2023-08-24

Applicant: Nokia Technologies Oy

Inventor： Mikko-Ville Laitinen ,  Juha Vilkamo

IPC: H04S3/02 ,  G10L19/008

CPC classification number: H04S3/02 ,  G10L19/008 ,  H04S2420/11 ,  H04S2420/03 ,  H04S2400/15

Abstract: An apparatus configured to: determine at least one spatial audio parameter for providing spatial audio reproduction; determine at least one transport signal; determine at least one coherence parameter for at least two frequency bands, wherein a sound scene is configured to be reproduced based, at least partially, on the at least one transport signal, the at least one spatial audio parameter, and the at least one coherence parameter; and provide the at least one transport signal, the at least one spatial audio parameter, and the at least one coherence parameter for encoding.