公开(公告)号：US20250087222A1

公开(公告)日：2025-03-13

申请号：US18466688

申请日：2023-09-13

Applicant: Apple Inc.

Inventor： Ravi Kiran Chivukula ,  Dipanjan Sen ,  Tejaswi Nanjundaswamy

IPC: G10L19/02

Abstract: A target decoder may receive a bitstream including an audio frame in a target format associated with a target encoder and a metadata frame associated with the audio frame. The audio frame may be transcoded from an earlier audio frame. The metadata frame may be converted from an earlier metadata frame associated with the earlier audio frame. The target decoder may decode audio data from the audio frame and metadata from the metadata frame.

公开(公告)号：US20240404531A1

公开(公告)日：2024-12-05

申请号：US18662842

申请日：2024-05-13

Applicant: Apple Inc.

Inventor： Moo Young Kim ,  Sina Zamani ,  Dipanjan Sen ,  Tejaswi Nanjundaswamy

IPC: G10L19/008 ,  H04S7/00

Abstract: A method that includes a decoder-side method that includes receiving a bitstream that includes an encoded representation of an input audio signal and metadata associated with the input audio signal, producing a decoded representation of the input audio signal by decoding the encoded representation using a Matching Pursuit (MP) coding-based algorithm, producing audio driver signals by rendering the input audio signal based on the metadata, and driving speakers using the audio driver signals.

公开(公告)号：US20210098004A1

公开(公告)日：2021-04-01

申请号：US16584706

申请日：2019-09-26

Applicant: Apple Inc.

Inventor： Dipanjan Sen ,  Frank Baumgarte ,  Juha O. Merimaa

IPC: G10L19/008 ,  H04S7/00 ,  H04S3/00

Abstract: A first layer of data having a first set of Ambisonic audio components can be decoded where the first set of Ambisonic audio components is generated based on ambience and one or more object-based audio signals. A second layer of data is decoded having at least one of the one or more object-based audio signals. One of the object-based audio signals is subtracted from the first set of Ambisonic audio components. The resulting Ambisonic audio components are rendered to generate a first set of audio channels. The one or more object-based audio signals are spatially rendered to generate a second set of audio channels. Other aspects are described and claimed.

公开(公告)号：US20240406661A1

公开(公告)日：2024-12-05

申请号：US18671744

申请日：2024-05-22

Applicant: Apple Inc.

Inventor： Dipanjan Sen ,  Francois Becker ,  Moo Young Kim ,  Sang Uk Ryu

IPC: H04S7/00 ,  G10L19/008

Abstract: The various aspects of the disclosure here enable a content creation side to control how discrete audio objects that make up a sound program are rendered by a decoding side to achieve high spatial resolution, while giving the content creator the flexibility to decide how complex the spatial audio rendering should be in the decoding side. Metadata associated with the sound program will instruct a spatial audio renderer on how complex its listener motion compensation should be. Other aspects are also described and claimed.

公开(公告)号：US20240404497A1

公开(公告)日：2024-12-05

申请号：US18671818

申请日：2024-05-22

Applicant: Apple Inc.

Inventor： Dipanjan Sen ,  Moo Young Kim ,  Francois Becker ,  Sang Uk Ryu

IPC: G10K11/175 ,  G10L19/002 ,  H04S7/00

Abstract: The various aspects of the disclosure here enable a content creation side to control how a sound program is spatial audio rendered by a decoding side, so that an audio scene component in a metadata-specified three dimensional acoustic masking zone is not heard while another audio scene component in an un-masked zone of the sound program is heard by a listener of the playback. Other aspects are also described and claimed.

公开(公告)号：US20240114313A1

公开(公告)日：2024-04-04

申请号：US18471780

申请日：2023-09-21

Applicant: Apple Inc.

Inventor： Frank Baumgarte ,  Dipanjan Sen

IPC: H04S7/00 ,  G06T19/00

CPC classification number: H04S7/304 ,  G06T19/006 ,  H04S2420/01

Abstract: A method that includes receiving a first bitstream that includes an encoded version of an audio signal for a three-dimensional (3D) scene and a first set of metadata that has 1) a position of a 3D sub-scene within the scene and 2) a position of a sound source associated with the audio signal within the sub-scene; determining a position of a listener; spatially rendering the scene to produce the sound source with the audio signal at the position of the sound source with respect to the position of the listener; receiving a second bitstream that includes a second set of metadata that has a different position of the sub-scene; and adjusting the spatial rendering of the scene such that the position of the sound source changes to correspond to movement of the sub-scene from the position of the sub-scene to the different position of the sub-scene.

公开(公告)号：US20240105196A1

公开(公告)日：2024-03-28

申请号：US18471199

申请日：2023-09-20

Applicant: Apple Inc.

Inventor： Frank Baumgarte ,  Dipanjan Sen

IPC: G10L19/16 ,  G10L25/51

CPC classification number: G10L19/167 ,  G10L25/51

Abstract: A method that includes receiving an audio component associated with an audio scene, the audio component including an audio signal, determining a loudness level of the audio component based on the audio signal, receiving a target loudness level for the audio component, producing a bitstream with the audio component by encoding the audio signal and including metadata that has the loudness level and the target loudness level, and transmitting the bitstream to an electronic device.

公开(公告)号：US20240105195A1

公开(公告)日：2024-03-28

申请号：US18471156

申请日：2023-09-20

Applicant: Apple Inc.

Inventor： Frank Baumgarte ,  Dipanjan Sen

IPC: G10L19/16 ,  G10L19/008 ,  G10L25/51 ,  H04S7/00

CPC classification number: G10L19/167 ,  G10L19/008 ,  G10L25/51 ,  H04S7/30 ,  H04S2400/11 ,  H04S2400/13

Abstract: A method that includes receiving a bitstream that includes: a first signal of a first audio component associated with an audio scene, a first target loudness, and a first source loudness determined by an encoder side based on the first signal, and a second signal of a second audio component associated with the scene, a second target loudness, and a second source loudness determined by the encoder side based on the second signal; determining a first gain based on the first source and target loudness; determining a second gain based on the second source and target loudness; producing a first gain-adjusted signal by applying the first gain to the first signal; producing a second gain-adjusted signal by applying the second gain to the second signal; and producing the scene that includes the first and second audio components by combining the gain-adjusted audio signals into a group of signals.

公开(公告)号：US20240096335A1

公开(公告)日：2024-03-21

申请号：US18454409

申请日：2023-08-23

Applicant: Apple Inc.

Inventor： Sina Zamani ,  Moo Young Kim ,  Dipanjan Sen ,  Sang Uk Ryu ,  Juha O. Merimaa ,  Symeon Delikaris Manias

IPC: G10L19/008 ,  G10L25/03

CPC classification number: G10L19/008 ,  G10L25/03

Abstract: In one aspect, a computer-implemented method, includes obtaining object audio and metadata that spatially describes the object audio, converting the object audio to time-frequency domain Ambisonics audio based on the metadata, and encoding the time-frequency domain Ambisonics audio and a subset of the metadata as one or more bitstreams to be stored in computer-readable memory or transmitted to a remote device.

公开(公告)号：US11841899B2

公开(公告)日：2023-12-12

申请号：US16899019

申请日：2020-06-11

Applicant: Apple Inc.

Inventor： Jonathan D. Sheaffer ,  Symeon Delikaris Manias ,  Gaetan R. Lorho ,  Peter A. Raffensperger ,  Eric A. Allamanche ,  Frank Baumgarte ,  Dipanjan Sen ,  Joshua D. Atkins ,  Juha O. Merimaa

IPC: G06F16/683 ,  G06F16/174 ,  H04R1/40 ,  H04R3/00

CPC classification number: G06F16/683 ,  G06F16/1744 ,  H04R1/406 ,  H04R3/005 ,  H04R2410/00

Abstract: A device with microphones can generate microphone signals during an audio recording. The device can store, in an electronic audio data file, the microphone signals, and metadata that includes impulse responses of the microphones. Other aspects are described and claimed.