公开(公告)号：US20210168553A1

公开(公告)日：2021-06-03

申请号：US17167442

申请日：2021-02-04

Applicant: Dolby Laboratories Licensing Corporation

Inventor： C. Phillip Brown ,  Joshua Brandon Lando ,  Mark F. Davis ,  Alan J. Seefeldt ,  David Matthew Cooper ,  Dirk Jeroen Breebaart ,  Rhonda Wilson

IPC: H04S7/00

Abstract: A system and method of modifying a binaural signal using headtracking information. The system calculates a delay, a first filter response, and a second filter response, and applies these to the left and right components of the binaural signal according to the headtracking information. The system may also apply headtracking to parametric binaural signals. In this manner, headtracking may be applied to pre-rendered binaural audio.

公开(公告)号：US10771914B2

公开(公告)日：2020-09-08

申请号：US16777599

申请日：2020-01-30

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

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：US10764709B2

公开(公告)日：2020-09-01

申请号：US16477870

申请日：2018-01-10

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Dirk Jeroen Breebaart ,  Alan J. Seefeldt

IPC: H04S7/00 ,  H04R3/14 ,  H04S3/00

Abstract: A first playback stream presentation intended for reproduction on a first audio reproduction system and transform parameters may be received and decoded. The second playback stream presentation may be intended for reproduction on headphones. The transform parameters may be applied to an intermediate playback stream presentation to obtain the second playback stream presentation. The intermediate playback stream presentation may be the first playback stream presentation, a downmix of the first playback stream presentation, or an upmix of the first playback stream presentation. A cross-talk-cancelled signal may be obtained by processing the second playback stream presentation with a cross-talk cancellation algorithm. The cross-talk-cancelled signal may be processed by a dynamic equalization or gain stage wherein an amount of equalization or gain may be dependent on a level of the first playback stream presentation or the second playback stream presentation.

公开(公告)号：US20200227052A1

公开(公告)日：2020-07-16

申请号：US15754654

申请日：2016-08-24

Applicant: Dolby Laboratories Licensing Corporation ,  Dolby International AB

Inventor： Dirk Jeroen Breebaart ,  David Matthew Cooper ,  Leif Jonas Samuelsson ,  Jeroen Koppens ,  Rhonda Joy Wilson ,  Heiko PURNHAGEN ,  Alexander STAHLMANN

IPC: G10L19/008 ,  G06F3/16 ,  H04L29/06 ,  H04S7/00 ,  H04S1/00

Abstract: A method for encoding an input audio stream including the steps of obtaining a first playback stream presentation of the input audio stream intended for reproduction on a first audio reproduction system, obtaining a second playback stream presentation of the input audio stream intended for reproduction on a second audio reproduction system, determining a set of transform parameters suitable for transforming an intermediate playback stream presentation to an approximation of the second playback stream presentation, wherein the transform parameters are determined by minimization of a measure of a difference between the approximation of the second playback stream presentation and the second playback stream presentation, and encoding the first playback stream presentation and the set of transform parameters for transmission to a decoder.

公开(公告)号：US20190373398A1

公开(公告)日：2019-12-05

申请号：US16477870

申请日：2018-01-10

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Dirk Jeroen Breebaart ,  Alan J. Seefeldt

IPC: H04S7/00 ,  H04S3/00 ,  H04R3/14

Abstract: A first playback stream presentation intended for reproduction on a first audio reproduction system and transform parameters may be received and decoded. The second playback stream presentation may be intended for reproduction on headphones. The transform parameters may be applied to an intermediate playback stream presentation to obtain the second playback stream presentation. The intermediate playback stream presentation may be the first playback stream presentation, a downmix of the first playback stream presentation, or an upmix of the first playback stream presentation. A cross-talk-cancelled signal may be obtained by processing the second playback stream presentation with a cross-talk cancellation algorithm. The cross-talk-cancelled signal may be processed by a dynamic equalization or gain stage wherein an amount of equalization or gain may be dependent on a level of the first playback stream presentation or the second playback stream presentation.

公开(公告)号：US10382880B2

公开(公告)日：2019-08-13

申请号：US15109557

申请日：2014-12-23

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Grant A. Davidson ,  Kuan-Chieh Yen ,  Dirk Jeroen Breebaart

IPC: H04R5/00 ,  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：US10277997B2

公开(公告)日：2019-04-30

申请号：US15749750

申请日：2016-08-04

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Lianwu Chen ,  Lie Lu ,  Dirk Jeroen Breebaart

IPC: G10L19/008 ,  H04S3/00 ,  H04R3/12

Abstract: Example embodiments disclosed herein relate to audio signal processing. The audio signal has multiple audio objects. A method of processing an audio signal is disclosed. The method includes obtaining an object position for each of the audio objects; and determining cluster positions for grouping the audio objects into clusters based on the object positions, a plurality of object-to-cluster gains, and a set of metrics. The metrics indicate a quality of the cluster positions and a quality of the object-to-cluster gains, each of the cluster positions is a centroid of a respective one of the clusters, and one of the object-to-cluster gains defines a ratio of the respective audio object in one of the clusters. The method also includes determining the object-to-cluster gains based on the object positions, the cluster positions and the set of metrics; and generating a cluster signal based on the determined cluster positions and object-to-cluster gains. Corresponding system and computer program product are also disclosed.

公开(公告)号：US20180227691A1

公开(公告)日：2018-08-09

申请号：US15749750

申请日：2016-08-04

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Lianwu Chen ,  Lie Lu ,  Dirk Jeroen Breebaart

IPC: H04S3/00 ,  G10L19/008 ,  H04R3/12

CPC classification number: H04S3/008 ,  G10L19/008 ,  H04R3/12 ,  H04S2400/11

Abstract: Example embodiments disclosed herein relate to audio signal processing. The audio signal has multiple audio objects. A method of processing an audio signal is disclosed. The method includes obtaining an object position for each of the audio objects; and determining cluster positions for grouping the audio objects into clusters based on the object positions, a plurality of object-to-cluster gains, and a set of metrics. The metrics indicate a quality of the cluster positions and a quality of the object-to-cluster gains, each of the cluster positions is a centroid of a respective one of the clusters, and one of the object-to-cluster gains defines a ratio of the respective audio object in one of the clusters. The method also includes determining the object-to-cluster gains based on the object positions, the cluster positions and the set of metrics; and generating a cluster signal based on the determined cluster positions and object-to-cluster gains. Corresponding system and computer program product are also disclosed.

公开(公告)号：US09805725B2

公开(公告)日：2017-10-31

申请号：US14654460

申请日：2013-11-25

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Brett G. Crockett ,  Alan J. Seefeldt ,  Nicolas R. Tsingos ,  Rhonda Wilson ,  Dirk Jeroen Breebaart ,  Lie Lu ,  Lianwu Chen

IPC: H04R5/00 ,  G10L19/008 ,  G10L25/18 ,  G10L19/02 ,  H04S7/00 ,  G10L19/20

CPC classification number: G10L19/008 ,  G10L19/02 ,  G10L19/20 ,  G10L25/18 ,  H04S7/30 ,  H04S2400/13 ,  H04S2420/03

Abstract: Embodiments are directed a method of rendering object-based audio comprising determining an initial spatial position of objects having object audio data and associated metadata, determining a perceptual importance of the objects, and grouping the audio objects into a number of clusters based on the determined perceptual importance of the objects, such that a spatial error caused by moving an object from an initial spatial position to a second spatial position in a cluster is minimized for objects with a relatively high perceptual importance. The perceptual importance is based at least in part by a partial loudness of an object and content semantics of the object.

公开(公告)号：US09756445B2

公开(公告)日：2017-09-05

申请号：US14900117

申请日：2014-06-17

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Jun Wang ,  Lie Lu ,  Mingqing Hu ,  Dirk Jeroen Breebaart ,  Nicolas R. Tsingos

IPC: H04R5/00 ,  H04S7/00 ,  G10L19/008 ,  H04S3/00 ,  G10L21/0272 ,  G10L19/20 ,  G10L19/02 ,  H04S5/00

CPC classification number: H04S7/30 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/20 ,  G10L21/0272 ,  H04S3/002 ,  H04S5/005 ,  H04S2400/11 ,  H04S2400/13 ,  H04S2400/15 ,  H04S2420/07

Abstract: Embodiments of the present invention relate to adaptive audio content generation. Specifically, a method for generating adaptive audio content is provided. The method comprises extracting at least one audio object from channel-based source audio content, and generating the adaptive audio content at least partially based on the at least one audio object. Corresponding system and computer program product are also disclosed.