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：US10680569B2

公开(公告)日：2020-06-09

申请号：US16286153

申请日：2019-02-26

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alan J. Seefeldt

IPC: H03G9/10 ,  H03G9/02 ,  H04R3/04 ,  H03G9/00 ,  H03G9/18

Abstract: Distortion reducing multi-band compressor with timbre preservation is provided. Timbre preservation is achieved by determining a time-varying threshold in each of a plurality frequency bands as a function of a respective fixed threshold for the frequency band and, at least in part, an audio signal level and a fixed threshold outside such frequency band. If a particular frequency band receives significant gain reduction due to being above or approaching its fixed threshold, then a time-varying threshold of one or more other frequency bands are also decreased to receive some gain reduction. In a specific embodiment, time-varying thresholds can be computed from an average difference of the audio input signal in each frequency band and its respective fixed threshold.

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：US20190199309A1

公开(公告)日：2019-06-27

申请号：US16286153

申请日：2019-02-26

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alan J. Seefeldt

IPC: H03G9/10 ,  H03G9/18 ,  H04R3/04 ,  H03G9/00 ,  H03G9/02

Abstract: Distortion reducing multi-band compressor with timbre preservation is provided. Timbre preservation is achieved by determining a time-varying threshold in each of a plurality frequency bands as a function of a respective fixed threshold for the frequency band and, at least in part, an audio signal level and a fixed threshold outside such frequency band. If a particular frequency band receives significant gain reduction due to being above or approaching its fixed threshold, then a time-varying threshold of one or more other frequency bands are also decreased to receive some gain reduction. In a specific embodiment, time-varying thresholds can be computed from an average difference of the audio input signal in each frequency band and its respective fixed threshold.

公开(公告)号：US10255027B2

公开(公告)日：2019-04-09

申请号：US15934849

申请日：2018-03-23

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Nicolas R. Tsingos ,  Rhonda Wilson ,  Sunil Bharitkar ,  C. Phillip Brown ,  Alan J. Seefeldt ,  Remi Audfray

IPC: H04S3/02 ,  H04S5/00 ,  H04S5/02 ,  G06F3/16 ,  H04S7/00 ,  H04R5/04 ,  H04S1/00 ,  G06F3/0484

Abstract: Embodiments are described for a method of rendering audio for playback through headphones comprising receiving digital audio content, receiving binaural rendering metadata generated by an authoring tool processing the received digital audio content, receiving playback metadata generated by a playback device, and combining the binaural rendering metadata and playback metadata to optimize playback of the digital audio content through the headphones.

公开(公告)号：US10241740B2

公开(公告)日：2019-03-26

申请号：US14994073

申请日：2016-01-12

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Alan J. Seefeldt ,  Lucas E. Saule ,  Vincent Voron

IPC: G06F3/16 ,  G10K11/28 ,  H04R1/40 ,  H04R1/02 ,  H04R1/34

Abstract: A sound reflection assembly comprises a rigid structure having a sound reflection section and a support section, a rigid part in the support section, etc. A directional sound generation module is placed on the rigid part. The directional sound generation module is spatially oriented to direct sound waves generated by one or more speaker elements in the directional sound generation module towards the sound reflection section to be reflected by the sound reflection section towards an audience in an audience area in front of the sound reflection assembly. The directional sound generation module may be a sound bar.

公开(公告)号：US20190013786A1

公开(公告)日：2019-01-10

申请号：US16128642

申请日：2018-09-12

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Brett G. Crockett ,  Alan J. Seefeldt

IPC: H03G3/30 ,  H03G7/00 ,  H04R3/04 ,  H03G9/00 ,  G10L21/038 ,  H03G1/00 ,  G10L25/21

Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.

公开(公告)号：US09842605B2

公开(公告)日：2017-12-12

申请号：US14779322

申请日：2014-03-25

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Lie Lu ,  Alan J. Seefeldt ,  Jun Wang

IPC: G10L21/02 ,  G10L25/81 ,  G10L17/06

CPC classification number: G10L21/02 ,  G10L17/06 ,  G10L25/81

Abstract: Apparatus and methods for audio classifying and processing are disclosed. In one embodiment, an audio processing apparatus includes an audio classifier for classifying an audio signal into at least one audio type in real time; an audio improving device for improving experience of audience; and an adjusting unit for adjusting at least one parameter of the audio improving device in a continuous manner based on the confidence value of the at least one audio type.

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：US09768750B2

公开(公告)日：2017-09-19

申请号：US15447503

申请日：2017-03-02

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Brett G. Crockett ,  Alan J. Seefeldt

IPC: H04R29/00 ,  H03G5/00 ,  H03G3/30 ,  H03G7/00 ,  H03G9/00 ,  H03G1/00 ,  H04R3/04 ,  G10L21/038 ,  G10L25/21

CPC classification number: H03G3/3005 ,  G10L21/038 ,  G10L25/21 ,  H03G1/00 ,  H03G3/3089 ,  H03G7/007 ,  H03G9/005 ,  H04R3/04 ,  H04R2430/03

Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.