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公开(公告)号：US12033645B2
公开(公告)日：2024-07-09
申请号：US18376913
申请日：2023-10-05
Applicant: DOLBY INTERNATIONAL AB
Inventor： Lars Villemoes
IPC: G10L19/02 , G10L19/025 , G10L19/26 , G10L21/038 , G10L21/04 , H03G3/00 , H03G3/30
CPC classification number: G10L19/0208 , G10L19/025 , G10L19/265 , G10L21/038 , G10L21/04 , H03G3/00 , H03G3/3089
Abstract: The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+rΩ0 is generated on the basis of existing components at Ω and Ω+Ω0. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank, a subband processing unit configurable by control data and a synthesis filter bank.
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公开(公告)号：US20240223987A1
公开(公告)日：2024-07-04
申请号：US18557590
申请日：2022-04-28
Applicant: DOLBY INTERNATIONAL AB
Inventor： Leon TERENTIV , Daniel FISCHER , Panji SETIAWAN , Christof FERSCH
IPC: H04S7/00
CPC classification number: H04S7/303 , H04S2400/11
Abstract: A method of modelling extended audio objects for audio rendering in a virtual or augmented reality environment is described. The method comprises obtaining an extent representation indicative of a geometric form of an extended audio object and information relating to one or more first audio sources that are associated with the extended audio object. Furthermore, the method comprises obtaining a relative point on the geometric form of the extended audio object based on a user position in the virtual or augmented reality environment. The method also comprises determining an extent parameter for the extent representation based on the user position and the relative point and determining positions of one or more second audio sources, relative to the user position, for modelling the extended audio object. In addition, the method comprises outputting a modified representation of the extended audio object for modelling the extended audio object.
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43.发明公开公开(公告)号：US20240223984A1
公开(公告)日：2024-07-04
申请号：US18410891
申请日：2024-01-11
Applicant: DOLBY INTERNATIONAL AB
Inventor： Leon TERENTIV , Christof FERSCH , Daniel FISCHER
IPC: H04S7/00 , G10L19/008 , H04S3/00
CPC classification number: H04S7/302 , G10L19/008 , H04S3/008 , H04S2400/01 , H04S2400/11 , H04S2400/13 , H04S2420/03
Abstract: The present disclosure relates to a method of processing audio content including directivity information for at least one sound source, the directivity information comprising a first set of first directivity unit vectors representing directivity directions and associated first directivity gains. The disclosure further relates to corresponding methods of encoding and decoding audio content including directivity information for at least one sound source.
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公开(公告)号：US20240187811A1
公开(公告)日：2024-06-06
申请号：US18327797
申请日：2021-12-02
Inventor： Mark R. P. Thomas , Daniel Arteaga , Christopher Graham Hines , Davide Scaini , Benjamin Southwell , Avery Bruni , Olha Michelle Townsend
IPC: H04S7/00
CPC classification number: H04S7/303 , H04S7/307 , H04S2400/11 , H04S2400/13 , H04S2400/15
Abstract: Some methods involve causing a plurality of audio devices in an audio environment to reproduce audio data, each audio device of the plurality of audio devices including at least one loudspeaker and at least one microphone, determining audio device location data including an audio device location for each audio device of the plurality of audio devices and obtaining microphone data from each audio device of the plurality of audio devices. Some methods involve determining a mutual audibility for each audio device of the plurality of audio devices relative to each other audio device of the plurality of audio devices, determining a user location of a person in the audio environment, determining a user location audibility of each audio device of the plurality of audio devices at the user location and controlling one or more aspects of audio device playback based, at least in part, on the user location audibility.
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45.发明公开公开(公告)号：US20240185871A1
公开(公告)日：2024-06-06
申请号：US18497300
申请日：2023-10-30
Applicant: DOLBY INTERNATIONAL AB
Inventor： Stephan Schreiner , Christof Fersch
IPC: G10L19/16 , G10L19/008 , H04N21/426 , H04N21/434 , H04N21/4363 , H04N21/439
CPC classification number: G10L19/167 , G10L19/008 , H04N21/42615 , H04N21/434 , H04N21/4363 , H04N21/4394
Abstract: The disclosure relates to methods, apparatus and systems for side load processing of packetized media streams. In an embodiment, the apparatus comprises: a receiver for receiving a bitstream, and a splitter for identifying a packet type in the bitstream and splitting, based on the identification of a value of the packet type in the bit stream into a main stream and an auxiliary stream.
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Patent Agency Ranking
公开(公告)号：US12003933B2
公开(公告)日：2024-06-04
申请号：US17630910
申请日：2020-07-25
Inventor： Alan J. Seefeldt , Joshua B. Lando , Daniel Arteaga
CPC classification number: H04R5/04 , H04R29/001 , H04R2400/01 , H04R2430/20 , H04S2400/15
Abstract: Methods for rendering audio for playback by two or more speakers are disclosed. The audio includes one or more audio signals, each with an associated intended perceived spatial position. Relative activation of the speakers may be a cost function of a model of perceived spatial position of the audio signals when played back over the speakers, a measure of proximity of the intended perceived spatial position of the audio signals to positions of the speakers, and one or more additional dynamically configurable functions. The dynamically configurable functions may be based on at least one or more properties of the audio signals, one or more properties of the set of speakers and/or one or more external inputs.
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公开(公告)号：US20240179485A1
公开(公告)日：2024-05-30
申请号：US18535192
申请日：2023-12-11
Inventor： Jun Wang , Giulio Cengarle , Juan Felix Torres , Daniel Arteaga
CPC classification number: H04S7/302 , H04R5/02 , H04S7/308 , H04S2400/11 , H04S2400/13
Abstract: An audio object including audio content and object metadata is received. The object metadata indicates an object spatial position of the audio object to be rendered by audio speakers in a playback environment. Based on the object spatial position and source spatial positions of the audio speakers, initial gain values for the audio speakers are determined. The initial gain values can be used to select a set of audio speakers from among the audio speakers. Based on the object spatial position and a set of source spatial positions at which the set of audio speakers are respectively located in the playback environment, a set of non-negative optimized gain values for the set of audio speakers is determined. The audio object at the object spatial position is rendered with the set of optimized gain values for the set of audio speakers.
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公开(公告)号：US20240171764A1
公开(公告)日：2024-05-23
申请号：US18429053
申请日：2024-01-31
Applicant: DOLBY INTERNATIONAL AB
Inventor： Tomoyuki Yamamoto , Tomohiro Ikai , Yukinobu Yasugi , Takeshi Tsukuba
IPC: H04N19/44 , H04N19/50 , H04N19/51 , H04N19/52 , H04N19/537 , H04N19/573 , H04N19/577 , H04N19/61 , H04N19/70 , H04N19/96
CPC classification number: H04N19/44 , H04N19/50 , H04N19/51 , H04N19/52 , H04N19/537 , H04N19/573 , H04N19/577 , H04N19/61 , H04N19/70 , H04N19/96
Abstract: A reference picture information decoding unit (13) omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.
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49.发明公开公开(公告)号：US20240155427A1
公开(公告)日：2024-05-09
申请号：US18503083
申请日：2023-11-06
Applicant: Dolby International AB
Inventor： Heiko PURNHAGEN , Per EKSTRAND
IPC: H04W28/06 , G10L19/008 , G10L19/035 , H04S1/00 , H04W28/02
CPC classification number: H04W28/065 , G10L19/008 , G10L19/035 , H04S1/007 , H04W28/0215 , G10L19/038 , H04S2420/03
Abstract: The present disclosure provides methods, devices and computer program products for non-uniform quantization of parameters. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system taking the non-uniformly quantized parameters into account. According to the disclosure, such an approach renders it possible to reduce bit consumption without substantially reducing the quality of the reconstructed audio object.
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公开(公告)号：US20240153517A1
公开(公告)日：2024-05-09
申请号：US18504879
申请日：2023-11-08
Applicant: Dolby International AB
Inventor： Kristofer Kjörling , Heiko Purnhagen , Harald Mundt , Karl Jonas Roeden , Leif Sehlström
CPC classification number: G10L19/20 , G10L19/008 , G10L19/0212 , G10L19/167 , G10L25/18 , H04S3/008 , H04S2400/03 , H04S2420/03
Abstract: A method for decoding an encoded audio bitstream in an audio processing system is disclosed. The method includes extracting from the encoded audio bitstream a first waveform-coded signal comprising spectral coefficients corresponding to frequencies up to a first cross-over frequency for a time frame and performing parametric decoding at a second cross-over frequency for the time frame to generate a reconstructed signal. The second cross-over frequency is above the first cross-over frequency and the parametric decoding uses reconstruction parameters derived from the encoded audio bitstream to generate the reconstructed signal. The method also includes extracting from the encoded audio bitstream a second waveform-coded signal comprising spectral coefficients corresponding to a subset of frequencies above the first cross-over frequency for the time frame and interleaving the second waveform-coded signal with the reconstructed signal to produce an interleaved signal for the time frame.
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