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    TRANSITIONING OF AMBIENT HIGHER-ORDER AMBISONIC COEFFICIENTS
    31.
    发明申请
    TRANSITIONING OF AMBIENT HIGHER-ORDER AMBISONIC COEFFICIENTS 有权
    环境友好的高级健康系数的过渡

    公开(公告)号：US20150213803A1

    公开(公告)日：2015-07-30

    申请号：US14594533

    申请日：2015-01-12

    Applicant: QUALCOMM Incorporated

    Inventor： Nils Günther Peters ,  Dipanjan Sen

    IPC: G10L19/002

    CPC classification number: G10L19/002 ,  G10L19/008 ,  H04S2420/11

    Abstract: In general, techniques are described for transitioning an ambient higher order ambisonic coefficient. A device comprising a memory and a processor may be configured to perform the techniques. The processor may obtain, from a frame of a bitstream of encoded audio data, a bit indicative of a reduced vector. The reduced vector may represent, at least in part, a spatial component of a sound field. The processor may also obtain, from the frame, a bit indicative of a transition of an ambient higher-order ambisonic coefficient. The ambient higher-order ambisonic coefficient may represent, at least in part, an ambient component of the sound field. The reduced vector may include a vector element associated with the ambient higher-order ambisonic coefficient in transition. The memory may be configured to store the frame of the bitstream.

    Abstract translation: 一般来说，描述了用于转换环境较高阶的Ambisonic系数的技术。 包括存储器和处理器的装置可以被配置为执行这些技术。 处理器可以从经编码的音频数据的比特流的帧获得表示减小的向量的比特。 缩小矢量可以至少部分地表示声场的空间分量。 处理器还可以从帧获得指示环境高阶ambisonic系数的转变的位。 环境高阶ambisonic系数可以至少部分地表示声场的环境分量。 缩小矢量可以包括与转变中的环境高阶ambisonic系数相关联的向量元素。 存储器可以被配置为存储比特流的帧。

    ENERGY PRESERVATION FOR DECOMPOSED REPRESENTATIONS OF A SOUND FIELD
    34.
    发明申请
    ENERGY PRESERVATION FOR DECOMPOSED REPRESENTATIONS OF A SOUND FIELD 审中-公开
    对声场的分解表示的能量保护

    公开(公告)号：US20140355769A1

    公开(公告)日：2014-12-04

    申请号：US14289323

    申请日：2014-05-28

    Applicant: QUALCOMM Incorporated

    Inventor： Nils Günther Peters ,  Martin James Morrell ,  Dipanjan Sen

    IPC: G10L19/008 ,  G10L19/032 ,  G06F17/16 ,  H04S3/00

    CPC classification number: H04S5/005 ,  G06F17/16 ,  G10L19/002 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/038 ,  G10L19/06 ,  G10L19/167 ,  G10L19/20 ,  G10L25/18 ,  G10L2019/0001 ,  G10L2019/0005 ,  H04R2205/021 ,  H04S7/30 ,  H04S7/304 ,  H04S7/40 ,  H04S2400/01 ,  H04S2400/15 ,  H04S2420/01 ,  H04S2420/03 ,  H04S2420/11

    Abstract: In general, techniques are described for performing a vector-based synthesis with respect to higher order ambisonic coefficients (or, in other words, spherical harmonic coefficients). A device comprising a processor may be configured to perform the techniques. The processor may perform the vector-based synthesis with respect to spherical harmonic coefficients to generate decomposed representations of the plurality of spherical harmonic coefficients and determine distinct and background directional information from the directional information. The processor may then reduce an order of the directional information associated with the background audio objects to generate transformed background directional information, and apply compensation to increase values of the transformed directional information to preserve an overall energy of the sound field.

    Abstract translation: 通常，描述了相对于较高阶的Ambisonic系数（或换句话说，球面谐波系数）执行基于矢量的合成的技术。 包括处理器的设备可以被配置为执行技术。 处理器可以执行关于球谐函数的基于矢量的合成，以产生多个球谐函数的分解表示，并根据方向信息确定不同的和背景的方向信息。 然后，处理器可以减少与背景音频对象相关联的方向信息的顺序，以产生经变换的背景方向信息，并且应用补偿来增加变换的方向信息的值以保持声场的整体能量。

    SPECIFYING SPHERICAL HARMONIC AND/OR HIGHER ORDER AMBISONICS COEFFICIENTS IN BITSTREAMS
    35.
    发明申请
    SPECIFYING SPHERICAL HARMONIC AND/OR HIGHER ORDER AMBISONICS COEFFICIENTS IN BITSTREAMS 有权
    指定体格和谐和/或更高级别的生物安全系数

    公开(公告)号：US20140249827A1

    公开(公告)日：2014-09-04

    申请号：US14192819

    申请日：2014-02-27

    Applicant: QUALCOMM Incorporated

    Inventor： Dipanjan Sen ,  Martin James Morrell

    IPC: G10L19/008

    CPC classification number: G10L19/008 ,  G10L19/018 ,  G10L19/167 ,  G10L19/20 ,  H04S2420/11

    Abstract: In general, techniques are described for specifying spherical harmonic coefficients in a bitstream. A device comprising one or more processors may perform the techniques. The processors may be configured to identify, from the bitstream, a plurality of hierarchical elements describing a sound field that are included in the bitstream. The processors may further be configured to parse the bitstream to determine the identified plurality of hierarchical elements.

    Abstract translation: 通常，描述用于指定比特流中的球谐函数的技术。 包括一个或多个处理器的设备可以执行这些技术。 处理器可以被配置为从比特流中识别描述包括在比特流中的声场的多个分层元素。 处理器还可以被配置为解析比特流以确定所识别的多个分层元素。

    TRANSFORMING SPHERICAL HARMONIC COEFFICIENTS
    36.
    发明申请
    TRANSFORMING SPHERICAL HARMONIC COEFFICIENTS 有权
    变换球形谐波系数

    公开(公告)号：US20140247946A1

    公开(公告)日：2014-09-04

    申请号：US14192829

    申请日：2014-02-27

    Applicant: QUALCOMM Incorporated

    Inventor： Dipanjan Sen ,  Martin James Morrell ,  Nils Günther Peters

    IPC: G10L19/008

    CPC classification number: G10L19/008 ,  G10L19/018 ,  G10L19/167 ,  G10L19/20 ,  H04S2420/11

    Abstract: In general, techniques are described for transforming spherical harmonic coefficients. A device comprising one or more processors may perform the techniques. The processors may be configured to parse the bitstream to determine transformation information describing how the sound field was transformed to reduce a number of the plurality of hierarchical elements that provide information relevant in describing the sound field. The processors may further be configured to, when reproducing the sound field based on those of the plurality of hierarchical elements that provide information relevant in describing the sound field, transform the sound field based on the transformation information to reverse the transformation performed to reduce the number of the plurality of hierarchical elements.

    Abstract translation: 一般来说，描述了用于转换球谐函数的技术。 包括一个或多个处理器的设备可以执行这些技术。 处理器可以被配置为解析比特流以确定描述声场如何被​​变换的变换信息，以减少提供与描述声场有关的信息的多个分层元素的数量。 处理器还可以被配置为当基于提供与描述声场相关的信息的多个分层元素中的那些再现声场时，基于变换信息来转换声场，以反转执行的变换以减少数字 的多个分层元素。

    LOUDSPEAKER POSITION COMPENSATION WITH 3D-AUDIO HIERARCHICAL CODING
    37.
    发明申请
    LOUDSPEAKER POSITION COMPENSATION WITH 3D-AUDIO HIERARCHICAL CODING 有权
    扬声器位置补偿与3D音频分层编码

    公开(公告)号：US20140016802A1

    公开(公告)日：2014-01-16

    申请号：US13942657

    申请日：2013-07-15

    Applicant: Qualcomm Incorporated

    Inventor： Dipanjan Sen

    IPC: H04S3/00

    CPC classification number: H04S3/006 ,  H04S3/002 ,  H04S7/30 ,  H04S2400/03 ,  H04S2420/11

    Abstract: In general, techniques are described for compensating for loudspeaker positions using hierarchical three-dimensional (3D) audio coding. An apparatus comprising or more processors may perform the techniques. The processors may be configured to perform a first transform that is based on a spherical wave model on a first set of audio channel information for a first geometry of speakers to generate a first hierarchical set of elements that describes a sound field. The processors may further be configured to perform a second transform in a frequency domain on the first hierarchical set of elements to generate a second set of audio channel information for a second geometry of speakers.

    Abstract translation: 通常，描述了使用分层三维（3D）音频编码来补偿扬声器位置的技术。 包括或多个处理器的装置可以执行这些技术。 处理器可以被配置为执行基于用于扬声器的第一几何形状的第一组音频信道信息上的球面波模型的第一变换，以生成描述声场的元素的第一分层集合。 处理器还可以被配置为在第一分层元件组上的频域中执行第二变换，以生成用于扬声器的第二几何形状的第二组音频通道信息。

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