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1. 发明授权

US09560461B2 Automatic loudspeaker polarity detection 有权
标题翻译：自动扬声器极性检测
公开(公告)号：US09560461B2
公开(公告)日：2017-01-31
申请号：US14761906
申请日：2014-01-17
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAl AB
发明人： Mark F. Davis , Louis Fielder , Antonio Mateos Sole , Giulio Cengarle , Sunil Bharitkar
IPC分类号： H04R29/00 , H04S7/00 , H04S3/00
CPC分类号： H04R29/001 , H04R29/002 , H04S3/00 , H04S7/00
摘要： In some embodiments, a method for automatic detection of polarity of speakers, e.g., speakers installed in cinema environments. In some embodiments, the method determines relative polarities of a set of speakers (e.g., loudspeakers and/or drivers of a multi-driver loudspeaker) using a set of microphones, including by measuring impulse responses, including an impulse response for each speaker-microphone pair; clustering the speakers into a set of groups, each group including at least two of the speakers which are similar to each other in at least one respect; and for each group, determining and analyzing cross-correlations of pairs of impulse responses (e.g., pairs of processed versions of impulse responses) of speakers in the group to determine relative polarities of the speakers. Other aspects include systems configured (e.g., programmed) to perform any embodiment of the inventive method, and computer readable media (e.g., discs) which store code for implementing any embodiment of the inventive method.
摘要翻译：在一些实施例中，用于自动检测扬声器（例如安装在电影环境中的扬声器）的极性的方法。在一些实施例中，该方法使用一组麦克风来确定一组扬声器（例如，多驱动扬声器的扬声器和/或驱动器）的相对极性，包括通过测量脉冲响应，包括每个扬声器麦克风的脉冲响应对; 将扬声器聚集成一组，每个组包括至少两个在至少一个方面彼此相似的扬声器; 并且对于每个组，确定和分析组中的扬声器的脉冲响应对（例如脉冲响应的处理版本对）的交叉相关性，以确定扬声器的相对极性。其他方面包括配置（例如，编程）用于执行本发明方法的任何实施例的系统，以及存储用于实现本发明方法的任何实施例的代码的计算机可读介质（例如，盘）。

2. 发明授权

US10893375B2 Headtracking for parametric binaural output system and method 有权
公开(公告)号：US10893375B2
公开(公告)日：2021-01-12
申请号：US16516121
申请日：2019-07-18
申请人： DOLBY INTERNATIONAL AB , Dolby Laboratories Licensing Corporation
发明人： Dirk Jeroen Breebaart , David Matthew Cooper , Mark F. Davis , David S. McGrath , Kristofer Kjoerling , Harald Mundt , Rhonda J. Wilson
IPC分类号： H04S7/00 , G10L19/008 , H04S3/00 , H04R5/033
摘要： A method of encoding channel or object based input audio for playback, the method including the steps of: (a) initially rendering the channel or object based input audio into an initial output presentation; (b) determining an estimate of the dominant audio component from the channel or object based input audio and determining a series of dominant audio component weighting factors for mapping the initial output presentation into the dominant audio component; (c) determining an estimate of the dominant audio component direction or position; and (d) encoding the initial output presentation, the dominant audio component weighting factors, the dominant audio component direction or position as the encoded signal for playback.

3. 发明授权

US10362431B2 Headtracking for parametric binaural output system and method 有权
公开(公告)号：US10362431B2
公开(公告)日：2019-07-23
申请号：US15777058
申请日：2016-11-17
申请人： Dolby Laboratories Licensing Corporation , DOLBY INTERNATIONAL AB
发明人： Dirk Jeroen Breebaart , David Matthew Cooper , Mark F. Davis , David S. McGrath , Kristofer Kjoerling , Harald Mundt , Rhonda J. Wilson
IPC分类号： H04S7/00 , G10L19/008 , H04S3/00 , H04R5/033
摘要： A method of encoding channel or object based input audio for playback, the method including the steps of: (a) initially rendering the channel or object based input audio into an initial output presentation; (b) determining an estimate of the dominant audio component from the channel or object based input audio and determining a series of dominant audio component weighting factors for mapping the initial output presentation into the dominant audio component; (c) determining an estimate of the dominant audio component direction or position; and (d) encoding the initial output presentation, the dominant audio component weighting factors, the dominant audio component direction or position as the encoded signal for playback.

4. 发明授权

US11308969B2 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
申请人： Dolby Laboratories Licensing Corporation
发明人： Mark F. Davis
IPC分类号： G10L19/00 , G10L19/06 , G10L19/008 , G10L19/02 , G10L19/005 , G10L19/018 , G10L19/025 , G10L19/26 , H04S3/00
摘要： 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.

5. 发明授权

US10932082B2 Headtracking for pre-rendered binaural audio 有权
公开(公告)号：US10932082B2
公开(公告)日：2021-02-23
申请号：US16309578
申请日：2017-06-20
申请人： Dolby Laboratories Licensing Corporation
发明人： C. Phillip Brown , Joshua Brandon Lando , Mark F. Davis , Alan J. Seefeldt , David Matthew Cooper , Dirk Jeroen Breebaart , Rhonda Wilson
IPC分类号： H04S7/00
摘要： A system and method of modifying a binaural signal using headtracking information. The system calculates a delay, a first filter response, and a second filter response, and applies these to the left and right components of the binaural signal according to the headtracking information. The system may also apply headtracking to parametric binaural signals. In this manner, headtracking may be applied to pre-rendered binaural audio.

6. 发明授权

US10887715B2 Audio channel spatial translation 有权
公开(公告)号：US10887715B2
公开(公告)日：2021-01-05
申请号：US16439670
申请日：2019-06-12
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Mark F. Davis
IPC分类号： H04R5/00 , H04S5/02 , H04S3/02 , H04S5/00
摘要： The present invention is directed to methods and apparatus for translating a first plurality of audio input channels to a second plurality of audio output channels. This includes determining that there is pair-wise coding among any of the first plurality of audio input channels, determining an input/output-mapping matrix for mapping at least a first set of the first plurality of audio input channels to at least a second set of the second plurality of audio output channels; and deriving the second plurality of audio output channels based on first plurality of audio input channels, the input/output-mapping matrix and the determined pair-wise coding. The first plurality of audio input channels represent the same soundfield represented by the second plurality of audio output channels.

7. 发明授权

US09697842B1 Reconstructing audio signals with multiple decorrelation techniques and differentially coded parameters 有权
公开(公告)号：US09697842B1
公开(公告)日：2017-07-04
申请号：US15446663
申请日：2017-03-01
申请人： Dolby Laboratories Licensing Corporation
发明人： Mark F. Davis
IPC分类号： G10L19/00 , G10L19/06 , G10L19/025 , G10L19/008 , G10L19/26
CPC分类号： G10L19/06 , G10L19/005 , G10L19/008 , G10L19/018 , G10L19/02 , G10L19/0204 , G10L19/025 , G10L19/26 , H04S3/00 , H04S3/008
摘要： 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.

8. 发明授权

US09691405B1 Reconstructing audio signals with multiple decorrelation techniques and differentially coded parameters 有权
公开(公告)号：US09691405B1
公开(公告)日：2017-06-27
申请号：US15446678
申请日：2017-03-01
申请人： Dolby Laboratories Licensing Corporation
发明人： Mark F. Davis
IPC分类号： G10L19/00 , G10L19/06 , G10L19/025 , G10L19/008 , G10L19/26
CPC分类号： G10L19/06 , G10L19/005 , G10L19/008 , G10L19/018 , G10L19/02 , G10L19/0204 , G10L19/025 , G10L19/26 , H04S3/00 , H04S3/008
摘要： 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.

9. 发明授权

US09691404B2 Reconstructing audio signals with multiple decorrelation techniques 有权
公开(公告)号：US09691404B2
公开(公告)日：2017-06-27
申请号：US15422119
申请日：2017-02-01
申请人： Dolby Laboratories Licensing Corporation
发明人： Mark F. Davis
IPC分类号： G10L19/00 , G10L19/06 , G10L19/008 , G10L19/02 , G10L19/025 , G10L19/26
CPC分类号： G10L19/06 , G10L19/005 , G10L19/008 , G10L19/018 , G10L19/02 , G10L19/0204 , G10L19/025 , G10L19/26 , H04S3/00 , H04S3/008
摘要： 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.

10. 发明申请

US20170148457A1 Reconstructing Audio Signals with Multiple Decorrelation Techniques 有权
公开(公告)号：US20170148457A1
公开(公告)日：2017-05-25
申请号：US15422119
申请日：2017-02-01
申请人： Dolby Laboratories Licensing Corporation
发明人： Mark F. Davis
IPC分类号： G10L19/06 , G10L19/26 , G10L19/025 , G10L19/008 , G10L19/02
CPC分类号： G10L19/06 , G10L19/005 , G10L19/008 , G10L19/018 , G10L19/02 , G10L19/0204 , G10L19/025 , G10L19/26 , H04S3/00 , H04S3/008
摘要： 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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