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    Method and device for metadata for multi-channel or sound-field audio signals
    1.
    发明授权
    Method and device for metadata for multi-channel or sound-field audio signals 有权

    公开(公告)号：US10381013B2

    公开(公告)日：2019-08-13

    申请号：US15967363

    申请日：2018-04-30

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Oliver Wuebbolt ,  Johannes Boehm ,  Peter Jax

    IPC: H04S3/00 ,  G10L19/008 ,  H04R5/027 ,  G10L19/16

    Abstract: Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. An improved method for encoding pre-processed audio data comprises encoding the pre-processed audio data, and encoding auxiliary data that indicate the particular audio pre-processing. An improved method for decoding encoded audio data comprises determining that the encoded audio data had been pre-processed before encoding, decoding the audio data, extracting from received data information about the pre-processing, and post-processing the decoded audio data according to the extracted pre-processing information.

    Method and device for improving the rendering of multi-channel audio signals
    3.
    发明授权
    Method and device for improving the rendering of multi-channel audio signals 有权
    用于改善多声道音频信号渲染的方法和装置

    公开(公告)号：US09589571B2

    公开(公告)日：2017-03-07

    申请号：US14415714

    申请日：2013-07-19

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Olivier Wuebbolt ,  Johannes Boehm ,  Peter Jax

    IPC: G10L19/08 ,  G10L19/008

    CPC classification number: G10L19/008 ,  G10L19/167 ,  H04R5/027 ,  H04S3/008 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2400/15 ,  H04S2420/03 ,  H04S2420/11

    Abstract: Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. An improved method for encoding pre-processed audio data comprises encoding the pre-processed audio data, and encoding auxiliary data that indicate the particular audio pre-processing. An improved method for decoding encoded audio data comprises determining that the encoded audio data had been pre-processed before encoding, decoding the audio data, extracting from received data information about the pre-processing, and post-processing the decoded audio data according to the extracted pre-processing information.

    Abstract translation: 传统的音频压缩技术执行标准化的信号转换，独立于内容的类型。 多信道信号被分解成其信号分量，随后进行量化和编码。 这是不利的，因为缺乏关于场景组成的特征的知识，特别是对于例如。 多声道音频或高阶Ambisonics（HOA）内容。 用于编码预处理音频数据的改进方法包括对预处理的音频数据进行编码，以及编码指示特定音频预处理的辅助数据。 一种用于对编码音频数据进行解码的改进方法包括：在编码之前确定已编码的音频数据已经被预处理，对音频数据进行解码，从接收的数据中提取关于预处理的信息，以及根据该处理对后述的解码音频数据进行后处理 提取预处理信息。

    Method and apparatus for screen related adaptation of a Higher-Order Ambisonics audio signal
    4.
    发明授权
    Method and apparatus for screen related adaptation of a Higher-Order Ambisonics audio signal 有权

    公开(公告)号：US11570566B2

    公开(公告)日：2023-01-31

    申请号：US17558581

    申请日：2021-12-21

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Peter Jax ,  Johannes Boehm ,  William Redmann

    IPC: H04S7/00 ,  H04R5/00 ,  G10L19/008

    Abstract: A method for generating loudspeaker signals associated with a target screen size is disclosed. The method includes receiving a bit stream containing encoded higher order ambisonics signals, the encoded higher order ambisonics signals describing a sound field associated with a production screen size. The method further includes decoding the encoded higher order ambisonics signals to obtain a first set of decoded higher order ambisonics signals representing dominant components of the sound field and a second set of decoded higher order ambisonics signals representing ambient components of the sound field. The method also includes combining the first set of decoded higher order ambisonics signals and the second set of decoded higher order ambisonics signals to produce a combined set of decoded higher order ambisonics signals.

    Method and apparatus for screen related adaptation of a higher-order ambisonics audio signal
    5.
    发明授权
    Method and apparatus for screen related adaptation of a higher-order ambisonics audio signal 有权

    公开(公告)号：US10771912B2

    公开(公告)日：2020-09-08

    申请号：US16374665

    申请日：2019-04-03

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Peter Jax ,  Johannes Boehm ,  William Redmann

    IPC: H04S7/00 ,  H04R5/00 ,  G10L19/008

    Abstract: A method for generating loudspeaker signals associated with a target screen size is disclosed. The method includes receiving a bit stream containing encoded higher order ambisonics signals, the encoded higher order ambisonics signals describing a sound field associated with a production screen size. The method further includes decoding the encoded higher order ambisonics signals to obtain a first set of decoded higher order ambisonics signals representing dominant components of the sound field and a second set of decoded higher order ambisonics signals representing ambient components of the sound field. The method also includes combining the first set of decoded higher order ambisonics signals and the second set of decoded higher order ambisonics signals to produce a combined set of decoded higher order ambisonics signals.

    Method and apparatus for screen related adaptation of a higher-order ambisonics audio signal
    8.
    发明授权
    Method and apparatus for screen related adaptation of a higher-order ambisonics audio signal 有权

    公开(公告)号：US11228856B2

    公开(公告)日：2022-01-18

    申请号：US17003289

    申请日：2020-08-26

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Peter Jax ,  Johannes Boehm ,  William Redmann

    IPC: H04S7/00 ,  H04R5/00 ,  G10L19/008

    Abstract: A method for generating loudspeaker signals associated with a target screen size is disclosed. The method includes receiving a bit stream containing encoded higher order ambisonics signals, the encoded higher order ambisonics signals describing a sound field associated with a production screen size. The method further includes decoding the encoded higher order ambisonics signals to obtain a first set of decoded higher order ambisonics signals representing dominant components of the sound field and a second set of decoded higher order ambisonics signals representing ambient components of the sound field. The method also includes combining the first set of decoded higher order ambisonics signals and the second set of decoded higher order ambisonics signals to produce a combined set of decoded higher order ambisonics signals.

    Methods, apparatus and systems for encoding and decoding of multi-channel audio data
    9.
    发明授权
    Methods, apparatus and systems for encoding and decoding of multi-channel audio data 有权

    公开(公告)号：US10460737B2

    公开(公告)日：2019-10-29

    申请号：US16403224

    申请日：2019-05-03

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Oliver Wuebbolt ,  Johannes Boehm ,  Peter Jax

    IPC: G10L19/008 ,  H04S3/00 ,  G10L19/16 ,  H04R5/027

    Abstract: Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. A method for decoding an encoded bitstream of multi-channel audio data and associated metadata is provided, including transforming the first Ambisonics format of the multi-channel audio data to a second Ambisonics format representation of the multi-channel audio data, wherein the transforming maps the first Ambisonics format of the multi-channel audio data into the second Ambisonics format representation of the multi-channel audio data. A method for encoding multi-channel audio data that includes audio data in an Ambisonics format, wherein the encoding includes transforming the encoded multi-channel audio data into a second format encoded multi-channel audio data is also provided.

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