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1. 发明授权

US10381013B2 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
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Oliver Wuebbolt , Johannes Boehm , Peter Jax
IPC分类号： H04S3/00 , G10L19/008 , H04R5/027 , G10L19/16
摘要： 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.

2. 发明授权

US09691406B2 Method for encoding audio signals, apparatus for encoding audio signals, method for decoding audio signals and apparatus for decoding audio signals 有权
公开(公告)号：US09691406B2
公开(公告)日：2017-06-27
申请号：US14896383
申请日：2014-05-27
申请人： Dolby Laboratories Licensing Corporation
发明人： Peter Jax , Alexander Krueger
IPC分类号： G10L19/24 , G10L19/008 , G10L19/038 , H04S3/00
CPC分类号： G10L19/24 , G10L19/008 , G10L19/038 , H04S3/008 , H04S2420/11
摘要： The invention introduces a new concept for hierarchical coding of HOA content. A method for encoding a hierarchical audio bitstream comprises rendering a HOA input signal to surround sound, encoding the surround sound for a base layer output signal, decoding the encoded surround sound to obtain a reconstructed surround sound signal, performing dimensionality reduction on the received HOA input signal, calculating a residual between the dimensionality-reduced HOA signal and the reconstructed surround sound signal, encoding the residual signal, and multiplexing structural information about the HOA input signal, the encoded residuals and the encoded surround sound into a bitstream to obtain a hierarchical audio bitstream.

3. 发明授权

US09589571B2 Method and device for improving the rendering of multi-channel audio signals 有权
标题翻译：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
申请人： Dolby Laboratories Licensing Corporation
发明人： Olivier Wuebbolt , Johannes Boehm , Peter Jax
IPC分类号： G10L19/08 , G10L19/008
CPC分类号： G10L19/008 , G10L19/167 , H04R5/027 , H04S3/008 , H04S2400/01 , H04S2400/03 , H04S2400/15 , H04S2420/03 , H04S2420/11
摘要： 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.
摘要翻译：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。

4. 发明申请

US20220020382A1 METHODS, APPARATUS AND SYSTEMS FOR ENCODING AND DECODING OF MULTI-CHANNEL AMBISONICS AUDIO DATA 有权
公开(公告)号：US20220020382A1
公开(公告)日：2022-01-20
申请号：US17392210
申请日：2021-08-02
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Oliver Wuebbolt , Johannes Boehm , Peter Jax
IPC分类号： G10L19/008 , H04S3/00
摘要： 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 audio data in an Ambisonics format into encoded multi-channel audio data is also provided.

5. 发明申请

US20190259396A1 METHODS, APPARATUS AND SYSTEMS FOR ENCODING AND DECODING OF MULTI-CHANNEL AUDIO DATA 审中-公开
公开(公告)号：US20190259396A1
公开(公告)日：2019-08-22
申请号：US16403224
申请日：2019-05-03
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Oliver Wuebbolt , Johannes Boehm , Peter Jax
IPC分类号： G10L19/008 , H04S3/00
摘要： 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 firstAmbisonics 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.

6. 发明授权

US11570566B2 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
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Peter Jax , Johannes Boehm , William Redmann
IPC分类号： H04S7/00 , H04R5/00 , G10L19/008
摘要： 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.

7. 发明授权

US10771912B2 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
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Peter Jax , Johannes Boehm , William Redmann
IPC分类号： H04S7/00 , H04R5/00 , G10L19/008
摘要： 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.

8. 发明授权

US10304469B2 Methods and apparatus for encoding and decoding multi-channel HOA audio signals 有权
公开(公告)号：US10304469B2
公开(公告)日：2019-05-28
申请号：US15685252
申请日：2017-08-24
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Johannes Boehm , Sven Kordon , Alexander Krüger , Peter Jax
IPC分类号： H04S3/02 , G10L19/02 , G10L19/008 , G10L19/012 , G10L19/038
摘要： A method for encoding multi-channel HOA audio signals for noise reduction comprises steps of decorrelating the channels using an inverse adaptive DSHT, the inverse adaptive DSHT comprising a rotation operation and an inverse DSHT, with the rotation operation rotating the spatial sampling grid of the iDSHT, perceptually encoding each of the decorrelated channels, encoding rotation information, the rotation information comprising parameters defining said rotation operation, and transmitting or storing the perceptually encoded audio channels and the encoded rotation information.

9. 发明授权

US09837087B2 Method and apparatus for encoding multi-channel HOA audio signals for noise reduction, and method and apparatus for decoding multi-channel HOA audio signals for noise reduction 有权
公开(公告)号：US09837087B2
公开(公告)日：2017-12-05
申请号：US15275699
申请日：2016-09-26
申请人： Dolby Laboratories Licensing Corporation
发明人： Johannes Boehm , Sven Kordon , Alexander Krueger , Peter Jax
IPC分类号： G10L19/012 , G10L19/008 , G10L19/02 , G10L19/038 , H04S3/02
CPC分类号： G10L19/012 , G10L19/008 , G10L19/0212 , G10L19/038 , H04S3/02 , H04S2420/11
摘要： A method for encoding multi-channel HOA audio signals for noise reduction comprises steps of decorrelating the channels using an inverse adaptive DSHT, the inverse adaptive DSHT comprising a rotation operation and an inverse DSHT, with the rotation operation rotating the spatial sampling grid of the iDSHT, perceptually encoding each of the decorrelated channels, encoding rotation information, the rotation information comprising parameters defining said rotation operation, and transmitting or storing the perceptually encoded audio channels and the encoded rotation information.

10. 发明授权

US11081117B2 Methods, apparatus and systems for encoding and decoding of multi-channel Ambisonics audio data 有权
公开(公告)号：US11081117B2
公开(公告)日：2021-08-03
申请号：US16580738
申请日：2019-09-24
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Oliver Wuebbolt , Johannes Boehm , Peter Jax
IPC分类号： G10L19/008 , H04S3/00 , H04R5/027 , G10L19/16
摘要： 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 audio data in an Ambisonics format into encoded multi-channel audio data is also provided.

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