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公开(公告)号：US20240282323A1
公开(公告)日：2024-08-22
申请号：US18649738
申请日：2024-04-29
IPC分类号： G10L19/02 , G10L19/008 , H04S7/00
CPC分类号： G10L19/0212 , G10L19/008 , G10L19/0204 , H04S7/308 , H04R2460/03 , H04S2400/01 , H04S2420/01 , H04S2420/03 , H04S2420/07
摘要： A method for representing a second presentation of audio channels or objects as a data stream, the method comprising the steps of: (a) providing a set of base signals, the base signals representing a first presentation of the audio channels or objects; (b) providing a set of transformation parameters, the transformation parameters intended to transform the first presentation into the second presentation; the transformation parameters further being specified for at least two frequency bands and including a set of multi-tap convolution matrix parameters for at least one of the frequency bands.
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公开(公告)号：US20240134595A1
公开(公告)日：2024-04-25
申请号：US18463827
申请日：2023-09-07
申请人： Sonos, Inc.
发明人： Timothy W. Sheen
CPC分类号： G06F3/165 , H03G5/005 , H03G5/165 , H04R3/04 , H04R29/001 , H04R29/007 , H04S7/301 , H04S7/303 , H04S7/307 , H04R2227/001 , H04R2227/005 , H04S2420/07
摘要： Example techniques facilitate calibration of a playback device. An example implementation involves a computing device capturing, via a microphone, data representing multiple iterations of a calibration sound as played by a playback device. The computing device identifies multiple sections within the captured data. Two or more sections represent respective iterations of the calibration sound as played by the playback device. Based on the multiple identified sections, the computing device determines a frequency response of the playback device, the frequency response of the playback device representing audio output by the playback device and acoustic characteristics of an environment around the playback device. Based on the frequency response of the playback device and a target frequency response, the computing device determines one or more parameters of an audio processing algorithm and sends, to the playback device, the one or more parameters of the audio processing algorithm.
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公开(公告)号：US20240107255A1
公开(公告)日：2024-03-28
申请号：US18255251
申请日：2021-12-02
发明人： Alan J. SEEFELDT , C. Phillip BROWN
IPC分类号： H04S7/00
CPC分类号： H04S7/303 , H04R2499/13 , H04S2420/07
摘要： Some methods involve receiving, by a control system configured for implementing a plurality of Tenderers, audio data and listening configuration data for a plurality of listening configurations, each listening configuration of the plurality of listening configurations corresponding to a listening position and a listening orientation in an audio environment, and rendering, by each Tenderer and according to the listening configuration data, the received audio data to obtain a set of Tenderer-specific loudspeaker feed signals for a corresponding listening configuration. Each Tenderer may be configured to render the audio data for a different listening configuration. Some such methods may involve decomposing each set of renderer-specific loudspeaker feed signals into a Tenderer-specific set of frequency bands and combining the renderer-specific frequency bands of each Tenderer to produce an output set of loudspeaker feed signals. Some such methods may involve outputting the output set of loudspeaker feed signals to a plurality of loudspeakers.
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公开(公告)号：US20240056755A1
公开(公告)日：2024-02-15
申请号：US18457030
申请日：2023-08-28
发明人： Florian KEILER , Johannes Boehm
CPC分类号： H04S3/02 , H04S7/308 , H04S2420/11 , H04S2400/11 , H04S2420/07
摘要： Improved methods and/or apparatus for decoding an encoded audio signal in soundfield format for L loudspeakers. The method and/or apparatus can render an Ambisonics format audio signal to 2D loudspeaker setup(s) based on a rendering matrix. The rendering matrix has elements based on loudspeaker positions and wherein the rendering matrix is determined based on weighting at least an element of a first matrix with a weighting factor
ℊ
=
1
L
.
The first matrix is determined based on positions of the L loudspeakers and at least a virtual position of at least a virtual loudspeaker that is added to the positions of the L loudspeakers.-
公开(公告)号：US11770667B2
公开(公告)日：2023-09-26
申请号：US17893729
申请日：2022-08-23
发明人： Florian Keiler , Johannes Boehm
CPC分类号： H04S3/02 , H04S7/308 , H04S2400/11 , H04S2420/07 , H04S2420/11
摘要： Improved methods and/or apparatus for decoding an encoded audio signal in soundfield format for L loudspeakers. The method and/or apparatus can render an Ambisonics format audio signal to 2D loudspeaker setup(s) based on a rendering matrix. The rendering matrix has elements based on loudspeaker positions and wherein the rendering matrix is determined based on weighting at least an element of a first matrix with a weighting factor
g
=
1
L
.
The first matrix is determined based on positions of the L loudspeakers and at least a virtual position of at least a virtual loudspeaker that is added to the positions of the L loudspeakers.-
公开(公告)号：US20230300557A1
公开(公告)日：2023-09-21
申请号：US18023183
申请日：2021-08-20
发明人： Hiroyuki Honma , Toru Chinen , Akifumi Kono
IPC分类号： H04S7/00 , G10L19/008 , H04S3/00 , G06N3/044 , G06N3/08
CPC分类号： H04S7/307 , G10L19/008 , H04S3/008 , G06N3/044 , G06N3/08 , H04S2420/07 , H04S2400/11 , H04S2420/01 , H04S2400/01
摘要： The present technology relates to signal processing device and method, learning device and method, and a program that enable even an inexpensive device to perform audio replaying with high quality.
A signal processing device includes: a decoding processing unit that demultiplexes an input bit stream into a first audio signal, meta data of the first audio signal, and first high-frequency band information for expanding a band; a band expanding unit that performs band expansion processing on the basis of a second audio signal and second high-frequency band information and thereby generates an output audio signal, the second audio signal being obtained by performing signal processing on the basis of the first audio signal and the meta data, the second high-frequency band information being generated on the basis of the first high-frequency band information. The present technology can be applied to a smartphone.-
公开(公告)号：US11750996B2
公开(公告)日：2023-09-05
申请号：US17893753
申请日：2022-08-23
发明人： Florian Keiler , Johannes Boehm
CPC分类号： H04S3/02 , H04S7/308 , H04S2400/11 , H04S2420/07 , H04S2420/11
摘要： Improved methods and/or apparatus for decoding an encoded audio signal in soundfield format for L loudspeakers. The method and/or apparatus can render an Ambisonics format audio signal to 2D loudspeaker setup(s) based on a rendering matrix. The rendering matrix has elements based on loudspeaker positions and wherein the rendering matrix is determined based on weighting at least an element of a first matrix with a weighting factor
g
=
1
L
.
The first matrix is determined based on positions of the L loudspeakers and at least a virtual position of at least a virtual loudspeaker that is added to the positions of the L loudspeakers.-
公开(公告)号：US11705139B2
公开(公告)日：2023-07-18
申请号：US17687956
申请日：2022-03-07
IPC分类号： G10L19/008 , H04S3/00
CPC分类号： G10L19/008 , H04S3/008 , H04S2400/01 , H04S2400/03 , H04S2400/13 , H04S2400/15 , H04S2420/03 , H04S2420/07
摘要： There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary encoding method includes inter alia calculating M downmix signals by forming combinations of N audio objects, wherein M≤N, and calculating parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M downmix signals. The calculation of the M downmix signals is made according to a criterion which is independent of any loudspeaker configuration.
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公开(公告)号：US11671781B2
公开(公告)日：2023-06-06
申请号：US17671876
申请日：2022-02-15
发明人： Juha Vilkamo , Mikko-Ville Laitinen
IPC分类号： H04S7/00 , G10L19/008 , H04R3/00
CPC分类号： H04S7/30 , G10L19/008 , H04R3/005 , H04S2400/15 , H04S2420/01 , H04S2420/07
摘要： Apparatus including a processor configured to: obtain at least two microphone audio signals; determine spatial metadata transmit and/or store the spatial metadata and at least one of: at least one of the at least two microphone audio signals, at least one microphone audio signal from at least one second microphone configured to capture at least part of a same sound scene captured with the at least one first microphone, or at least one signal based, at least partially, on the at least two microphone audio signals, wherein the transmitting and/or storing is configured to enable synthesis of a plurality of spherical harmonic audio signals.
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公开(公告)号：US20190103849A1
公开(公告)日：2019-04-04
申请号：US16058885
申请日：2018-08-08
申请人： Google LLC
CPC分类号： H03G5/165 , G06F3/167 , G06N3/04 , H04R1/403 , H04R1/406 , H04R3/005 , H04R3/04 , H04R3/12 , H04R29/001 , H04R2420/07 , H04R2430/03 , H04S7/301 , H04S7/305 , H04S2420/07
摘要： The various implementations described herein include methods, devices, and systems for automatic audio equalization. In one aspect, a method is performed at an electronic device that includes speakers, microphones, processors and memory. The electronic device outputs audio user content from the speakers and automatically equalizes subsequent audio output of the device without user input. The automatic equalization includes: (1) obtaining audio content signals, including receiving outputted audio content at each microphone; (2) determining from the audio content signals phase differences between microphones; (3) obtaining a feature vector based on the phase differences; (4) obtaining a frequency correction from a correction database based on the obtained feature vector; and (5) applying the obtained frequency correction to the subsequent audio output.
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