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    AUDIO SOURCE PARAMETERIZATION
    12.
    发明申请
    AUDIO SOURCE PARAMETERIZATION 审中-公开

    公开(公告)号：US20200327897A1

    公开(公告)日：2020-10-15

    申请号：US16090739

    申请日：2017-04-05

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jun WANG

    IPC: G10L21/0308 ,  H04S3/00 ,  G10L19/08

    Abstract: The present document describes a method (600) for estimating source parameters of audio sources (101) from mix audio signals (102), with. The mix audio signals (102) comprise a plurality of frames. The mix audio signals (102) are representable as a mix audio matrix in a frequency domain and the audio sources (101) are representable as a source matrix in the frequency domain. The method (600) comprises updating (601) an un-mixing matrix (221) which is configured to provide an estimate of the source matrix from the mix audio matrix, based on a mixing matrix (225) which is configured to provide an estimate of the mix audio matrix from the source matrix. Furthermore, the method (600) comprises updating (602) the mixing matrix (225) based on the un-mixing matrix (221) and based on the mix audio signals (102). In addition, the method (600) comprises iterating (603) the updating steps (601, 602) until an overall convergence criteria is met.

    UPMIXING OF AUDIO SIGNALS
    13.
    发明申请
    UPMIXING OF AUDIO SIGNALS 审中-公开

    公开(公告)号：US20180262856A1

    公开(公告)日：2018-09-13

    申请号：US15538892

    申请日：2016-02-09

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Jun WANG ,  Lie LU ,  Lianwu CHEN ,  Mingqing HU

    IPC: H04S5/00 ,  H04R1/32 ,  H04S7/00

    CPC classification number: H04S5/005 ,  H04R1/323 ,  H04S3/008 ,  H04S5/00 ,  H04S7/308 ,  H04S2400/11

    Abstract: Example embodiments disclosed herein relates to upmixing of audio signals. A method of upmixing an audio signal is described. The method includes decomposing the audio signal into a diffuse signal and a direct signal, generating an audio bed at least in part based on the diffuse signal, the audio bed including a height channel, extracting an audio object from the direct signal, estimating metadata of the audio object, the metadata including height information of the audio object; and rendering the audio bed and the audio object as an upmixed audio signal, wherein the audio bed is rendered to a predefined position and the audio object is rendered according to the metadata. Corresponding system and computer program product are described as well.

    SEPARATING AUDIO SOURCES
    14.
    发明申请
    SEPARATING AUDIO SOURCES 审中-公开

    公开(公告)号：US20180240470A1

    公开(公告)日：2018-08-23

    申请号：US15549651

    申请日：2016-02-11

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Jun WANG

    IPC: G10L21/028 ,  G06F3/0484 ,  G06F3/16

    CPC classification number: G10L21/028 ,  G06F3/0484 ,  G06F3/16 ,  G06F3/165 ,  G06F3/167 ,  G10H2210/305 ,  G10L19/008 ,  G10L21/0232 ,  G10L2021/02166

    Abstract: Example embodiments disclosed herein relate to source separation in audio content. A method for separating sources from audio content is disclosed, the audio content being of a multi-channel format based on a plurality of channels. The method comprises performing a component analysis on the audio content for each of the plurality of channels to generate a plurality of components, each of the plurality of components comprising a plurality of time-frequency tiles in full frequency band; generating at least one dominant source with at least one of the time-frequency tiles from the plurality of the components and separating the sources from the audio content by estimating spatial parameters and spectral parameters based on the dominant source. Corresponding system and computer program product are also disclosed.

    AUDIO SOURCE SEPARATION
    15.
    发明申请
    AUDIO SOURCE SEPARATION 审中-公开

    公开(公告)号：US20170365273A1

    公开(公告)日：2017-12-21

    申请号：US15543938

    申请日：2016-02-12

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jun WANG ,  David S. MC GRATH

    IPC: G10L21/0272 ,  G10L25/21

    CPC classification number: G10L21/0272 ,  G10L25/21

    Abstract: A method of audio source separation from audio content is disclosed. The method includes determining a spatial parameter of an audio source based on a linear combination characteristic of the audio source and an orthogonality characteristic of two or more audio sources to be separated in the audio content. The method also includes separating the audio source from the audio content based on the spatial parameter. Corresponding system and computer program product are also disclosed.

    AUDIO SOURCE SEPARATION
    19.
    发明申请
    AUDIO SOURCE SEPARATION 审中-公开

    公开(公告)号：US20190392848A1

    公开(公告)日：2019-12-26

    申请号：US16561836

    申请日：2019-09-05

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jun WANG ,  Lie LU ,  Qingyuan BIN

    IPC: G10L19/008 ,  H04S7/00 ,  G10L25/21 ,  G10L21/0232

    Abstract: The present document describes a method for extracting J audio sources from I audio channels. The method includes updating a Wiener filter matrix based on a mixing matrix from a source matrix and based on a power matrix of the J audio sources. Furthermore, the method includes updating a cross-covariance matrix of the I audio channels and of the J audio sources and an auto-covariance matrix of the J audio sources, based on the updated Wiener filter matrix and based on an auto-covariance matrix of the I audio channels. In addition, the method includes updating the mixing matrix and the power matrix based on the updated cross-covariance matrix of the I audio channels and of the J audio sources, and/or based on the updated auto-covariance matrix of the J audio sources.

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