公开(公告)号：US20240430637A1

公开(公告)日：2024-12-26

申请号：US18759221

申请日：2024-06-28

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

公开(公告)号：US20230199427A1

公开(公告)日：2023-06-22

申请号：US18108663

申请日：2023-02-13

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. COOPER ,  Zhiwei SHUANG

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

CPC classification number: H04S7/306 ,  G10L19/008 ,  H04S3/004 ,  H04S2400/03 ,  H04S2420/01 ,  H04S2400/13 ,  H04S7/307

Abstract: In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

公开(公告)号：US20220264244A1

公开(公告)日：2022-08-18

申请号：US17688744

申请日：2022-03-07

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

公开(公告)号：US20220182779A1

公开(公告)日：2022-06-09

申请号：US17560301

申请日：2021-12-23

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. COOPER ,  Zhiwei SHUANG

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

Abstract: In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

公开(公告)号：US20210227344A1

公开(公告)日：2021-07-22

申请号：US17090772

申请日：2020-11-05

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

公开(公告)号：US20200335112A1

公开(公告)日：2020-10-22

申请号：US16841415

申请日：2020-04-06

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Dirk Jeroen BREEBAART

IPC: G10L19/008 ,  G10L19/012 ,  G10L19/00 ,  G10L19/02

Abstract: Encoding/decoding an audio signal having one or more audio components, wherein each audio component is associated with a spatial location. A first audio signal presentation (z) of the audio components, a first set of transform parameters (w(f)), and signal level data (β2) are encoded and transmitted to the decoder. The decoder uses the first set of transform parameters (w(f)) to form a reconstructed simulation input signal intended for an acoustic environment simulation, and applies a signal level modification (α) to the reconstructed simulation input signal. The signal level modification is based on the signal level data (β2) and data (p2) related to the acoustic environment simulation. The attenuated reconstructed simulation input signal is then processed in an acoustic environment simulator. With this process, the decoder does not need to determine the signal level of the simulation input signal, thereby reducing processing load.

公开(公告)号：US20200329326A1

公开(公告)日：2020-10-15

申请号：US16915670

申请日：2020-06-29

Applicant: Dolby Laboratories Licensing Corporation ,  Dolby International AB

Inventor： Leif Jonas SAMUELSSON ,  Dirk Jeroen BREEBAART ,  David Matthew COOPER ,  Jeroen KOPPENS

IPC: H04S1/00 ,  H04S3/00 ,  H04R5/04 ,  H04S7/00

Abstract: Methods for dialogue enhancing audio content, comprising providing a first audio signal presentation of the audio components, providing a second audio signal presentation, receiving a set of dialogue estimation parameters configured to enable estimation of dialogue components from the first audio signal presentation, applying said set of dialogue estimation parameters to said first audio signal presentation, to form a dialogue presentation of the dialogue components; and combining the dialogue presentation with said second audio signal presentation to form a dialogue enhanced audio signal presentation for reproduction on the second audio reproduction system, wherein at least one of said first and second audio signal presentation is a binaural audio signal presentation.

公开(公告)号：US20190364379A1

公开(公告)日：2019-11-28

申请号：US16538671

申请日：2019-08-12

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

公开(公告)号：US20190182612A1

公开(公告)日：2019-06-13

申请号：US16310569

申请日：2017-07-13

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Lianwu CHEN ,  Lie LU ,  Dirk Jeroen BREEBAART

IPC: H04S7/00 ,  H04R5/02 ,  H04S3/00

CPC classification number: H04S7/303 ,  H04R5/02 ,  H04S3/008 ,  H04S7/30 ,  H04S7/308 ,  H04S2400/01 ,  H04S2400/11 ,  H04S2400/13 ,  H04S2420/01

Abstract: Example embodiments disclosed herein relate to audio object clustering based on renderer-aware perceptual difference. A method of processing audio objects is provided. The method includes obtaining renderer-related information indicating a configuration of a renderer. The method also includes determining, based on the obtained renderer-related information, a rendering difference between a first audio object and a second audio object among the audio objects with respect to the renderer. The method further includes clustering the audio objects at least in part based on the rendering difference. Corresponding system, device, and computer program product are also disclosed.

公开(公告)号：US20180359596A1

公开(公告)日：2018-12-13

申请号：US15777058

申请日：2016-11-17

Applicant: Dolby Laboratories Licensing Corporation ,  DOLBY INTERNATIONAL AB

Inventor： Dirk Jeroen BREEBAART ,  David Matthew COOPER ,  Mark F. DAVIS ,  David S. McGRATH ,  Kristofer KJOERLING ,  Harald MUNDT ,  Rhonda J. WILSON

IPC: H04S7/00 ,  G10L19/008 ,  H04R5/033 ,  H04S3/00

CPC classification number: H04S7/304 ,  G10L19/008 ,  H04R5/033 ,  H04S3/004 ,  H04S3/008 ,  H04S2400/01 ,  H04S2400/11 ,  H04S2420/01 ,  H04S2420/03

Abstract: A method of encoding channel or object based input audio for playback, the method including the steps of: (a) initially rendering the channel or object based input audio into an initial output presentation; (b) determining an estimate of the dominant audio component from the channel or object based input audio and determining a series of dominant audio component weighting factors for mapping the initial output presentation into the dominant audio component; (c) determining an estimate of the dominant audio component direction or position; and (d) encoding the initial output presentation, the dominant audio component weighting factors, the dominant audio component direction or position as the encoded signal for playback.