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    SOURCE SEPARATION AND REMIXING IN SIGNAL PROCESSING
    1.
    发明申请
    SOURCE SEPARATION AND REMIXING IN SIGNAL PROCESSING 有权

    公开(公告)号：US20250046328A1

    公开(公告)日：2025-02-06

    申请号：US18709129

    申请日：2022-10-26

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Jundai SUN ,  Zhiwei SHUANG ,  Yuanxing MA

    IPC: G10L21/028 ,  G10L25/84 ,  G10L25/93

    Abstract: The present disclosure relates to a method and audio processing system (1) for performing source separation. The method comprises obtaining (S1) an audio signal (Sin) including a mixture of speech content and noise content, determining (S2a, S2b, S2c), from the audio signal, speech content (formula A), stationary noise content (formula C) and non-speech content (formula B). The stationary noise content (formula C) is a true subset of the non-speech content (formula B) and the method further comprises determining (S3), based on a difference between the stationary noise content (formula C) and the non-speech content (formula B) a non-stationary noise content formula D), obtaining (S5) a set of weighting factors and forming (S6) a processed audio signal based on a combination of the speech content (formula A), the stationary noise content (formula C), and the non-stationary noise content (formula D) weighted with their respective weighting factor. (Ŝ1)  formula A ({circumflex over (N)}1)  formula B ({circumflex over (N)}2)  formula C ({circumflex over (N)}NS)  formula D

    CONTEXT AWARE SOUNDSCAPE CONTROL
    2.
    发明公开
    CONTEXT AWARE SOUNDSCAPE CONTROL 审中-公开

    公开(公告)号：US20240155289A1

    公开(公告)日：2024-05-09

    申请号：US18548791

    申请日：2022-04-28

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Zhiwei SHUANG ,  Yuanxing MA ,  Yang LIU

    IPC: H04R3/00 ,  G10L21/0216 ,  H04R1/10 ,  H04S7/00

    CPC classification number: H04R3/005 ,  G10L21/0216 ,  H04R1/1091 ,  H04S7/304 ,  H04R1/1016 ,  H04R2420/01 ,  H04R2499/11

    Abstract: Embodiments are disclosed for context aware soundscape control. In an embodiment, an audio processing method comprises: capturing, using a first set of microphones on a mobile device, a first audio signal from an audio scene; capturing, using a second set of microphones on a pair of earbuds, a second audio signal from the audio scene; capturing, using a camera on the mobile device, a video signal from a video scene; generating, with at least one processor, a processed audio signal from the first audio signal and the second audio signal, the processed audio signal generated with adaptive soundscape control based on context information; and combining, with the at least one processor, the processed audio signal and the captured video signal as multimedia output.

    CONTROL OF A VOLUME LEVELING UNIT USING TWO-STAGE NOISE CLASSIFIER
    3.
    发明申请
    CONTROL OF A VOLUME LEVELING UNIT USING TWO-STAGE NOISE CLASSIFIER 有权

    公开(公告)号：US20250166652A1

    公开(公告)日：2025-05-22

    申请号：US18835248

    申请日：2023-02-06

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Ziyu YANG ,  Lie LU ,  Zhiwei SHUANG

    IPC: G10L21/0224 ,  G06F3/16 ,  G10L21/034

    Abstract: Volume leveling of an audio signal using a volume leveling control signal. The method comprises determining a noise reliability ratio w(n) as a ratio of noise-like frames over all frames in a current time segment, determining a PGC noise confidence score XPGN(n) indicating a likelihood that professionally generated content, PGC, noise is present in the time segment, and determining, for the time segment, whether the noise reliability ratio is above a predetermined threshold. When the noise reliability ratio is above the predetermined threshold, the volume leveling control signal is updated based on the PGC noise confidence score, and when the noise reliability ratio is below the predetermined threshold, the volume leveling control signal is left unchanged. Volume leveling is improved by preventing boosting of e.g. phone-recorded environmental noise in UGC, while keeping original behavior for other types of content.

    METHOD AND APPARATUS FOR SPEECH SOURCE SEPARATION BASED ON A CONVOLUTIONAL NEURAL NETWORK
    4.
    发明申请
    METHOD AND APPARATUS FOR SPEECH SOURCE SEPARATION BASED ON A CONVOLUTIONAL NEURAL NETWORK 有权

    公开(公告)号：US20220223144A1

    公开(公告)日：2022-07-14

    申请号：US17611121

    申请日：2020-05-13

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jundai SUN ,  Zhiwei SHUANG ,  Lie LU ,  Shaofan YANG ,  Jia DAI

    IPC: G10L15/20 ,  G10L15/16 ,  G10L15/22 ,  G10L21/0308 ,  G10L25/18 ,  G06N3/08

    Abstract: Described herein is a method for Convolutional Neural Network (CNN) based speech source separation, wherein the method includes the steps of: (a) providing multiple frames of a time-frequency transform of an original noisy speech signal; (b) inputting the time-frequency transform of said multiple frames into an aggregated multi-scale CNN having a plurality of parallel convolution paths; (c) extracting and outputting, by each parallel convolution path, features from the input time-frequency transform of said multiple frames; (d) obtaining an aggregated output of the outputs of the parallel convolution paths; and (e) generating an output mask for extracting speech from the original noisy speech signal based on the aggregated output. Described herein are further an apparatus for CNN based speech source separation as well as a respective computer program product comprising a computer-readable storage medium with instructions adapted to carry out said method when executed by a device having processing capability.

    Generating Binaural Audio in Response to Multi-Channel Audio Using at Least One Feedback Delay Network
    6.
    发明申请
    Generating Binaural Audio in Response to Multi-Channel Audio Using at Least One Feedback Delay Network 审中-公开

    公开(公告)号：US20190373397A1

    公开(公告)日：2019-12-05

    申请号：US16541079

    申请日：2019-08-14

    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

    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.

    IMPROVING NOISE COMPENSATION IN MASK-BASED SPEECH ENHANCEMENT
    9.
    发明申请
    IMPROVING NOISE COMPENSATION IN MASK-BASED SPEECH ENHANCEMENT 有权

    公开(公告)号：US20250054508A1

    公开(公告)日：2025-02-13

    申请号：US18705446

    申请日：2022-11-07

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jundai SUN ,  Zhiwei SHUANG

    IPC: G10L21/0208 ,  G10L15/04 ,  G10L25/51 ,  G10L25/78

    Abstract: Methods and apparatus for improving noise compensation in mask-based speech enhancement are described. A method of processing an audio signal, which includes one or more speech segments, includes obtaining a mask for mask-based speech enhancement of the audio signal and obtaining a magnitude of the audio signal. An estimate of residual noise is determined in the audio signal after mask-based speech enhancement, based on the mask and the magnitude of the audio signal. A modified mask is determined based on the estimate of the residual noise. Further described are corresponding programs and computer-readable storage media.

    METHOD FOR NEURAL NETWORK TRAINING WITH MULTIPLE SUPERVISORS
    10.
    发明申请
    METHOD FOR NEURAL NETWORK TRAINING WITH MULTIPLE SUPERVISORS 有权

    公开(公告)号：US20250045585A1

    公开(公告)日：2025-02-06

    申请号：US18716895

    申请日：2022-12-08

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jundai SUN ,  Lie LU ,  Zhiwei SHUANG ,  Yuanxing MA

    IPC: G06N3/082

    Abstract: The present disclosure relates to a method for designing a processor (20) and a computer implemented neural network. The method comprises obtaining input data and corresponding ground truth target data and providing the input data to a processor (20) for outputting a first prediction of target data given the input data. The method further comprises providing the latent variables output by a processor module (21: 1, 21: 2, . . . 21: n−1) to a supervisor module (22: 1, 22: 2, 22: 3, . . . 22: n−1) which outputs a second prediction of target data based on latent variables and determining a first and second loss measure by comparing the predictions of target data with the ground truth target data. The method further comprises training the processor (20) and the supervisor module (22: 1, 22: 2, 22: 3, . . . 22: n−1) based on the first and second loss measure and adjusting the processor by at least one of removing, replacing and adding a processor module.

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