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1. 发明公开

US20240304196A1 MULTI-BAND DUCKING OF AUDIO SIGNALS 审中-公开
公开(公告)号：US20240304196A1
公开(公告)日：2024-09-12
申请号：US18551134
申请日：2022-04-01
申请人： Dolby Laboratories Licensing Corporation , DOLBY INTERNATIONAL AB
发明人： Rishabh TYAGI , Heiko PURNHAGEN
IPC分类号： G10L19/02 , G10L19/008
CPC分类号： G10L19/0204 , G10L19/008
摘要： A method for multi-band ducking of audio signals is provided. In some implementations, the method involves receiving, at a decoder, an input audio signal, wherein the input audio signal is a downmixed audio signal. In some implementations, the method involves separating the input audio signal into a first set of frequency bands. In some implementations, the method involves determining a set of ducking gains, a ducking gain corresponding to a frequency band of the first set of frequency bands. In some implementations, the method involves generating a broadband decorrelated audio signal, wherein ducking gains of the set of ducking gains are applied to at least one of: 1) a second set of frequency bands prior to generating the at least one broadband decorrelated audio signal: or 2) a third set of frequency bands that separates the at least one broadband decorrelated audio signal.

2. 发明公开

US20230232176A1 PERCEPTUAL OPTIMIZATION OF MAGNITUDE AND PHASE FOR TIME-FREQUENCY AND SOFTMASK SOURCE SEPARATION SYSTEMS 审中-公开
公开(公告)号：US20230232176A1
公开(公告)日：2023-07-20
申请号：US18008431
申请日：2021-06-10
申请人： Dolby Laboratories Licensing Corporation , DOLBY INTERNATIONAL AB
发明人： Aaron Steven MASTER , Lie LU , Heiko PURNHAGEN
IPC分类号： H04S7/00 , G10L21/0308 , H04S1/00 , G10L25/18
CPC分类号： H04S7/30 , G10L21/0308 , G10L25/18 , H04S1/007 , H04S2400/11
摘要： A method comprises: obtaining softmask values for frequency bins of time-frequency tiles representing an audio signal; reducing, or expanding and limiting, the softmask values; and applying the reduced, or expanded and limited, softmask values to the frequency bins to create a time-frequency representation of an estimated target source. An alternative method comprises, for each time-frequency tile: obtaining softmask values; applying the softmask values to the frequency bins to create a time-frequency domain representation of an estimated target source; obtaining a panning parameter and a source concentration estimates for the target source; determining, using the panning parameter estimate and the softmask values, a magnitude for the time-frequency representation of the estimated target source; determining, using the panning parameter estimate and the source phase concentration estimate, a phase for the time-frequency representation of the estimated target source; and combining the magnitude and the phase.

3. 发明申请

US20170309286A1 SYSTEM FOR MAINTAINING REVERSIBLE DYNAMIC RANGE CONTROL INFORMATION ASSOCIATED WITH PARAMETRIC AUDIO CODERS 有权
公开(公告)号：US20170309286A1
公开(公告)日：2017-10-26
申请号：US15648733
申请日：2017-07-13
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Jeffrey RIEDMILLER , Karl J. ROEDEN , Kristofer KJOERLING , Heiko PURNHAGEN , Vinay MELKOTE , Leif SEHLSTROM
IPC分类号： G10L19/24 , G10L19/008 , G10L19/16 , G10L19/18
CPC分类号： G10L19/24 , G10L19/008 , G10L19/167 , G10L19/18
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1≦m

4. 发明申请

US20160027447A1 SPATIAL COMFORT NOISE 审中-公开
标题翻译：空气舒适的噪音
公开(公告)号：US20160027447A1
公开(公告)日：2016-01-28
申请号：US14774966
申请日：2014-03-04
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Glenn N. DICKINS , Xuejing SUN , Yen-Liang SHUE , Heiko PURNHAGEN
IPC分类号： G10L19/012 , G10L19/008 , G10L21/0208 , H04M3/56
CPC分类号： G10L19/012 , G10L19/008 , G10L21/0208 , H04L12/1813 , H04L12/1827 , H04M3/568
摘要： A method, an apparatus, logic (e.g., executable instructions encoded in a non-transitory computer-readable medium to carry out a method), and a non-transitory computer-readable medium configured with such instructions. The method is to generate and spatially render spatial comfort noise at a receiving endpoint of a conference system, such that the comfort noise has target spectral characteristics typical of comfort noise, and at least one spatial property that at least substantially matches at least one target spatial property. On version includes receiving one or more or more audio signals from other endpoints, combining the received audio signals with the spatial comfort noise signals, and rendering the combination of the received audio signals and the spatial comfort noise signals to a set of output signals for loudspeakers, such that the spatial comfort noise signals are continually in the output signal sin addition to output from the received audio signals.
摘要翻译：一种方法，装置，逻辑（例如，在非暂时性计算机可读介质中编码以执行方法的可执行指令）以及配置有这种指令的非暂时计算机可读介质。该方法是在会议系统的接收端产生和空间地呈现空间舒适噪声，使得舒适噪声具有典型的舒适噪声的目标频谱特性，以及至少基本匹配至少一个目标空间属性。 On版本包括从其他端点接收一个或多个或更多个音频信号，将接收到的音频信号与空间舒适噪声信号组合，以及将接收到的音频信号和空间舒适噪声信号的组合呈现给用于扬声器的一组输出信号，使得空间舒适噪声信号连续地在输出信号sin中，从接收到的音频信号输出。

5. 发明公开

US20240018844A1 SYSTEM FOR MAINTAINING REVERSIBLE DYNAMIC RANGE CONTROL INFORMATION ASSOCIATED WITH PARAMETRIC AUDIO CODERS 审中-公开
公开(公告)号：US20240018844A1
公开(公告)日：2024-01-18
申请号：US18355168
申请日：2023-07-19
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Jeffrey RIEDMILLER , Karl J. ROEDEN , Kristofer KJOERLING , Heiko PURNHAGEN , Vinay MELKOTE , Leif SEHLSTROM
IPC分类号： E21B33/138 , E21B41/00 , E21B21/00 , G10L19/008 , G10L19/16 , G10L19/18 , G10L19/24
CPC分类号： E21B33/138 , E21B41/00 , E21B21/003 , G10L19/008 , G10L19/167 , G10L19/18 , G10L19/24
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (a) from the bitstream, where 1≤m

6. 发明公开

US20240005933A1 METHODS AND DEVICES FOR ENCODING AND/OR DECODING IMMERSIVE AUDIO SIGNALS 审中-公开
公开(公告)号：US20240005933A1
公开(公告)日：2024-01-04
申请号：US18349427
申请日：2023-07-10
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： David S. MCGRATH , Michael ECKERT , Heiko PURNHAGEN , Stefan BRUHN
IPC分类号： G10L19/16 , G10L19/008 , G10L19/18
CPC分类号： G10L19/167 , G10L19/008 , G10L19/18
摘要： The present document describes a method (700) for encoding a multi-channel input signal (201). The method (700) comprises determining (701) a plurality of downmix channel signals (203) from the multi-channel input signal (201) and performing (702) energy compaction of the plurality of downmix channel signals (203) to provide a plurality of compacted channel signals (404). Furthermore, the method (700) comprises determining (703) joint coding metadata (205) based on the plurality of compacted channel signals (404) and based on the multi-channel input signal (201), wherein the joint coding metadata (205) is such that it allows upmixing of the plurality of compacted channel signals (404) to an approximation of the multi-channel input signal (201). In addition, the method (700) comprises encoding (704) the plurality of compacted channel signals (404) and the joint coding metadata (205).

7. 发明申请

US20170289724A1 RENDERING AUDIO OBJECTS IN A REPRODUCTION ENVIRONMENT THAT INCLUDES SURROUND AND/OR HEIGHT SPEAKERS 审中-公开
公开(公告)号：US20170289724A1
公开(公告)日：2017-10-05
申请号：US15510213
申请日：2015-09-10
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Dirk Jeroen BREEBAART , Antonio Mateos SOLE , Heiko PURNHAGEN , Nicolas R. TSINGOS
IPC分类号： H04S7/00 , H04R3/12
CPC分类号： H04S7/30 , H04R3/12 , H04R2400/11 , H04S2400/03 , H04S2400/11
摘要： During a process, decorrelation may be selectively applied to audio data for an audio object based, at least in part, on whether a speaker for which speaker feed signals will be determined is a surround speaker. In some implementations, decorrelation may be selectively applied according to whether such a speaker is a height speaker. Some implementations may reduce, or even eliminate, audio artifacts such as comb-filter notches and peaks. Some such implementations may increase the size of a “sweet spot” of a reproduction environment.

8. 发明申请

US20160163321A1 Processing of Time-Varying Metadata for Lossless Resampling 有权
标题翻译：无损重采样的时变元数据处理
公开(公告)号：US20160163321A1
公开(公告)日：2016-06-09
申请号：US14903508
申请日：2014-07-01
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Brian George ARNOTT , Dirk Jeroen BREEBAART , Antonio MATEOS SOLE , David S. McGRATH , Heiko PURNHAGEN , Freddie SANCHEZ , Nicolas R. TSINGOS
IPC分类号： G10L19/00 , G10L19/005 , G10L19/24
CPC分类号： G10L19/0017 , G10L19/005 , G10L19/008 , G10L19/167 , G10L19/24
摘要： Embodiments are directed to a method of representing spatial rendering metadata for processing in an object-based audio system that allows for lossless interpolation and/or re-sampling of the metadata. The method comprises time stamping the metadata to create metadata instances, and encoding an interpolation duration to with each metadata instance that specifies the time to reach a desired rendering state for the respective metadata instance. The re-sampling of metadata is useful for re-clocking metadata to an audio coder and for the editing audio content.
摘要翻译：实施例涉及一种表示用于在基于对象的音频系统中进行处理的空间渲染元数据的方法，其允许元数据的无损内插和/或重新采样。该方法包括时间戳元数据以创建元数据实例，以及对每个元数据实例编码内插持续时间，该元数据实例指定为相应的元数据实例达到期望的呈现状态的时间。元数据的重新采样对于将元数据重新计时到音频编码器和编辑音频内容是有用的。

9. 发明申请

US20160155447A1 Bitstream Syntax for Spatial Voice Coding 有权
标题翻译：用于空间语音编码的位流语法
公开(公告)号：US20160155447A1
公开(公告)日：2016-06-02
申请号：US14392287
申请日：2014-06-26
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Janusz KLEJSA , Leif Jonas SAMUELSSON , Heiko PURNHAGEN , Glenn N. DICKINS
IPC分类号： G10L19/008 , G10L19/02 , G10L19/002 , G10L19/035
CPC分类号： G10L19/008 , G10L19/002 , G10L19/0204 , G10L19/0212 , G10L19/032 , G10L19/035
摘要： An encoding system (100) encodes a first (E1) and further (E2, E3) audio signals as a layered bitstream (B), wherein a quantizer for each frequency band of each signal is selected using a rate allocation rule based on signal-specific rate allocation data, a spectral envelope of the signal and a reference level (EnvE1Max), which is determined based on the spectral envelope of the first signal and is not necessarily included in the bitstream. Further disclosed is a decoding system for reconstructing the audio signals based on the bitstream. In embodiments, the bitstream has a basic layer (BE1), which contains data that enable decoding of the first audio signal, and a spatial layer (Bspatial) facilitating decoding of the further audio signal(s). In embodiments, the encoding system prepares the bitstream subject to a basic-layer bitrate constraint and a total bitrate constraint.
摘要翻译：编码系统（100）将第一（E1）和另外（E2，E3）音频信号编码为分层比特流（B），其中使用基于信号的比特率的速率分配规则来选择每个信号的每个频带的量化器，特定速率分配数据，信号的频谱包络和基于第一信号的频谱包络确定的参考电平（EnvE1Max），并且不一定包括在比特流中。还公开了一种用于基于比特流重建音频信号的解码系统。在实施例中，比特流具有包含能够对第一音频信号进行解码的数据的基本层（BE1）以及便于对其它音频信号进行解码的空间层（B空间）。在实施例中，编码系统根据基本层比特率约束和总比特率约束准备比特流。

10. 发明申请

US20210270106A1 SYSTEM FOR MAINTAINING REVERSIBLE DYNAMIC RANGE CONTROL INFORMATION ASSOCIATED WITH PARAMETRIC AUDIO CODERS 有权
公开(公告)号：US20210270106A1
公开(公告)日：2021-09-02
申请号：US17201689
申请日：2021-03-15
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Jeffrey RIEDMILLER , Karl J. ROEDEN , Kristofer KJOERLING , Heiko PURNHAGEN , Vinay MELKOTE , Leif SEHLSTROM
IPC分类号： E21B33/138 , E21B41/00 , E21B21/00
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (a) from the bitstream, where 1≤m

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