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    Audio channel spatial translation
    1.
    发明授权
    Audio channel spatial translation 有权

    公开(公告)号：US10469970B2

    公开(公告)日：2019-11-05

    申请号：US16162192

    申请日：2018-10-16

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Mark F. Davis

    IPC: H04R5/00 ,  H04S5/02 ,  H04S3/02 ,  H04S5/00

    Abstract: M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is associated, and at least one of the one or more of the M audio input channels is mapped to a respective set of at least three of the N output channels. At least three output channels of a set may be associated with contiguous spatial directions.

    Reconstructing Audio Signals with Multiple Decorrelation Techniques
    3.
    发明申请
    Reconstructing Audio Signals with Multiple Decorrelation Techniques 有权

    公开(公告)号：US20170178653A1

    公开(公告)日：2017-06-22

    申请号：US15446699

    申请日：2017-03-01

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Mark F. Davis

    IPC: G10L19/06 ,  G10L19/008 ,  G10L19/26 ,  G10L19/025

    CPC classification number: G10L19/06 ,  G10L19/005 ,  G10L19/008 ,  G10L19/018 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/025 ,  G10L19/26 ,  H04S3/00 ,  H04S3/008

    Abstract: A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters from the bitstream. The method also includes analyzing the M audio channels to detect a location of a transient, decorrelating the M audio channels, and deriving N audio channels from the M audio channels and the set of spatial parameters. A first decorrelation technique is applied to a first subset of each audio channel and a second decorrelation technique is applied to a second subset of each audio channel The first decorrelation technique represents a first mode of operation of a decorrelator, and the second decorrelation technique represents a second mode of operation of the decorrelator.

    Audio signal enhancement using estimated spatial parameters
    6.
    发明授权
    Audio signal enhancement using estimated spatial parameters 有权
    使用估计空间参数的音频信号增强

    公开(公告)号：US09489956B2

    公开(公告)日：2016-11-08

    申请号：US14767565

    申请日：2014-01-22

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Matthew Fellers ,  Vinay Melkote ,  Kuan-Chieh Yen ,  Grant A. Davidson ,  Mark F. Davis

    IPC: G10L19/008 ,  G10L19/02 ,  G10L19/012 ,  G10L25/06 ,  G10L25/18

    CPC classification number: G10L19/008 ,  G10L19/012 ,  G10L19/0204 ,  G10L25/06 ,  G10L25/18

    Abstract: Received audio data may include a first set of frequency coefficients and a second set of frequency coefficients. Spatial parameters for at least part of the second set of frequency coefficients may be estimated, based at least in part on the first set of frequency coefficients. The estimated spatial parameters may be applied to the second set of frequency coefficients to generate a modified second set of frequency coefficients. The first set of frequency coefficients may correspond to a first frequency range (for example, an individual channel frequency range) and the second set of frequency coefficients may correspond to a second frequency range (for example, a coupled channel frequency range). Combined frequency coefficients of a composite coupling channel may be based on frequency coefficients of two or more channels. Cross-correlation coefficients, between frequency coefficients of a first channel and the combined frequency coefficients, may be computed.

    Abstract translation: 接收的音频数据可以包括第一组频率系数和第二组频率系数。 可以至少部分地基于第一组频率系数来估计第二组频率系数的至少一部分的空间参数。 估计的空间参数可以应用于第二组频率系数，以产生经修改的第二组频率系数。 第一组频率系数可以对应于第一频率范围（例如，单个信道频率范围），并且第二组频率系数可以对应于第二频率范围（例如，耦合的信道频率范围）。 复合耦合信道的组合频率系数可以基于两个或更多个信道的频率系数。 可以计算第一通道的频率系数与组合频率系数之间的互相关系数。

    EMBEDDING DATA IN STEREO AUDIO USING SATURATION PARAMETER MODULATION
    8.
    发明申请
    EMBEDDING DATA IN STEREO AUDIO USING SATURATION PARAMETER MODULATION 有权
    使用饱和度参数调制在立体声音频中嵌入数据

    公开(公告)号：US20150163614A1

    公开(公告)日：2015-06-11

    申请号：US14412882

    申请日：2013-07-03

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Regunathan Radhakrishnan ,  Mark F. Davis

    IPC: H04S7/00 ,  H04S1/00

    CPC classification number: H04S7/30 ,  G10L19/018 ,  H04S1/00 ,  H04S2420/03

    Abstract: In some embodiments, a method for embedding data (e.g., metadata for use during post-processing) in a stereo audio signal comprising frames. Each of the frames has a saturation value, and data are embedded in the stereo audio signal by modifying the signal to generate a modulated stereo audio signal comprising a sequence of modulated frames having modulated saturation values indicative of the embedded data. Typically, one data bit is embedded in each frame of an input stereo audio signal by modifying the frame to produce a modulated frame whose modulated saturation value matches a target value indicative of the data bit. In other embodiments, a method for extracting data from a stereo audio signal in which the data have been embedded in accordance with an embodiment of the inventive embedding method. Other aspects are systems (e.g., programmed processors) configured to perform any embodiment of the inventive method.

    Abstract translation: 在一些实施例中，一种用于将数据（例如，后处理期间使用的元数据）嵌入到包括帧的立体声音频信号中的方法。 每个帧具有饱和值，并且通过修改信号来将数据嵌入在立体声音频信号中，以产生包含调制的帧序列的调制立体声音频信号，调制后的帧具有指示嵌入数据的调制饱和度值。 通常，通过修改帧来产生调制的帧，其调制饱和值与指示数据位的目标值相匹配，一个数据位嵌入在输入立体声音频信号的每个帧中。 在其他实施例中，根据本发明的嵌入方法的实施例，从立体声音频信号中提取数据的方法，其中已经嵌入了数据。 其他方面是被配置为执行本发明方法的任何实施例的系统（例如，编程处理器）。

    Methods and apparatus for reconstructing audio signals with decorrelation and differentially coded parameters
    10.
    发明授权
    Methods and apparatus for reconstructing audio signals with decorrelation and differentially coded parameters 有权

    公开(公告)号：US11308969B2

    公开(公告)日：2022-04-19

    申请号：US17063137

    申请日：2020-10-05

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Mark F. Davis

    IPC: G10L19/00 ,  G10L19/06 ,  G10L19/008 ,  G10L19/02 ,  G10L19/005 ,  G10L19/018 ,  G10L19/025 ,  G10L19/26 ,  H04S3/00

    Abstract: A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters from the bitstream. The method also includes analyzing the M audio channels to detect a location of a transient, decorrelating the M audio channels, and deriving N audio channels from the M audio channels and the set of spatial parameters. A first decorrelation technique is applied to a first subset of each audio channel and a second decorrelation technique is applied to a second subset of each audio channel. The first decorrelation technique represents a first mode of operation of a decorrelator, and the second decorrelation technique represents a second mode of operation of the decorrelator.

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