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：US20220263423A9

公开(公告)日：2022-08-18

申请号：US16718964

申请日：2019-12-18

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Xuejing SUN ,  Zhiwei SHUANG

IPC: H02M5/458 ,  B60L1/00 ,  H02M7/48 ,  H02M7/79 ,  H02M1/42 ,  H02M1/14 ,  B60L55/00 ,  B60L53/14

Abstract: Apparatus and methods for controlling a jitter buffer are described. In one embodiment, the apparatus for controlling a jitter buffer includes an inter-talkspurt delay jitter estimator for estimating an offset value of the delay of a first frame in the current talkspurt with respect to the delay of a latest anchor frame in a previous talkspurt, and a jitter buffer controller for adjusting a length of the jitter buffer based on a long term length of the jitter buffer for each frame and the offset value.

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：US20190342685A1

公开(公告)日：2019-11-07

申请号：US16510849

申请日：2019-07-12

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Louis D. FIELDER ,  Zhiwei SHUANG ,  Grant A. DAVIDSON ,  Xiguang ZHENG ,  Mark S. VINTON

IPC: H04S3/00 ,  H04S7/00 ,  H04S5/00 ,  G10K15/08

Abstract: The present disclosure relates to reverberation generation for headphone virtualization. A method of generating one or more components of a binaural room impulse response (BRIR) for headphone virtualization is described. In the method, directionally-controlled reflections are generated, wherein directionally-controlled reflections impart a desired perceptual cue to an audio input signal corresponding to a sound source location. Then at least the generated reflections are combined to obtain the one or more components of the BRIR. Corresponding system and computer program products are described as well.

公开(公告)号：US20180308507A1

公开(公告)日：2018-10-25

申请号：US15776718

申请日：2017-01-13

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Zhiwei SHUANG ,  David S. MCGRATH ,  Michael William MASON

IPC: G10L25/18 ,  G10L25/21 ,  H04R3/04

CPC classification number: G10L25/18 ,  G10L21/00 ,  G10L25/21 ,  H03G5/005 ,  H03G5/165 ,  H04R3/04 ,  H04R2430/03

Abstract: Example embodiments disclosed herein relate to audio signal processing with low latency. A method of processing an audio signal is disclosed. The method includes obtaining frequency parameters of a current frame of the audio signal. The method also includes generating intermediate frequency domain outputs for a set of predefined frequency bands based on the frequency parameters using predefined frequency band filter banks, a frequency band filter bank being specific to a respective frequency band in the set. The method further includes determining frequency band energies for the set of predefined frequency bands based on the intermediate frequency domain outputs, and processing the current frame based on the determined frequency band energies. Corresponding system, computer program product, and device for processing an audio signal are also disclosed.

公开(公告)号：US20170026771A1

公开(公告)日：2017-01-26

申请号：US15039695

申请日：2014-11-24

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Zhiwei SHUANG ,  David S. MCGRATH ,  Michael W. MASON

IPC: H04S7/00

CPC classification number: H04S7/307 ,  H03G9/025 ,  H04S7/306 ,  H04S2420/01 ,  H04S2420/07

Abstract: Embodiments of the present invention relate to audio signal processing. Specifically, a method for processing audio signal is provided, the method comprising: determining, for a current frame of the audio signal, frequency band energies for a plurality of predefined frequency bands at least partially based on frequency parameters of the current frame; generating frequency band gains for the plurality of predefined frequency bands by processing the frequency band energies; and generating frequency bin gains for the current frame based on the frequency band gains using predefined frequency band filter banks, the frequency band filter banks being specific to the plurality of predefined frequency bands. Corresponding system and computer program product are also disclosed.

Abstract translation: 本发明的实施例涉及音频信号处理。 具体地说，提供了一种用于处理音频信号的方法，所述方法包括：至少部分地基于当前帧的频率参数，确定音频信号的当前帧的多个预定频带的频带能量; 通过处理频带能量来产生多个预定频带的频带增益; 并且基于使用预定频带滤波器组的频带增益来生成当前帧的频率块增益，所述频带滤波器组特定于多个预定频带。 还公开了相应的系统和计算机程序产品。