-
公开(公告)号：US20210235212A1
公开(公告)日：2021-07-29
申请号：US17136348
申请日：2020-12-29
发明人： Mark F. DAVIS
IPC分类号： 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.
-
公开(公告)号：US20160005413A1
公开(公告)日：2016-01-07
申请号：US14767565
申请日：2014-01-22
IPC分类号： G10L19/02 , G10L19/012 , G10L25/18 , G10L19/008 , G10L25/06
CPC分类号： G10L19/008 , G10L19/012 , G10L19/0204 , G10L25/06 , G10L25/18
摘要： Received audio data may include a first set of frequency coefficients and a second set of frequency coefficients. Spatial parameters for at least part of the second set of frequency coefficients may be estimated, based at least in part on the first set of frequency coefficients. The estimated spatial parameters may be applied to the second set of frequency coefficients to generate a modified second set of frequency coefficients. The first set of frequency coefficients may correspond to a first frequency range (for example, an individual channel frequency range) and the second set of frequency coefficients may correspond to a second frequency range (for example, a coupled channel frequency range). Combined frequency coefficients of a composite coupling channel may be based on frequency coefficients of two or more channels. Cross-correlation coefficients, between frequency coefficients of a first channel and the combined frequency coefficients, may be computed.
摘要翻译： 接收的音频数据可以包括第一组频率系数和第二组频率系数。 可以至少部分地基于第一组频率系数来估计第二组频率系数的至少一部分的空间参数。 估计的空间参数可以应用于第二组频率系数，以产生经修改的第二组频率系数。 第一组频率系数可以对应于第一频率范围（例如，单个信道频率范围），并且第二组频率系数可以对应于第二频率范围（例如，耦合的信道频率范围）。 复合耦合信道的组合频率系数可以基于两个或更多个信道的频率系数。 可以计算第一通道的频率系数与组合频率系数之间的互相关系数。
-
公开(公告)号：US20190124460A1
公开(公告)日：2019-04-25
申请号：US16162192
申请日：2018-10-16
发明人： Mark F. DAVIS
IPC分类号： H04S5/00
摘要： M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is associated, and at least one of the one or more of the M audio input channels is mapped to a respective set of at least three of the N output channels. At least three output channels of a set may be associated with contiguous spatial directions.
-
公开(公告)号：US20160189723A1
公开(公告)日：2016-06-30
申请号：US15060425
申请日：2016-03-03
发明人： Mark F. DAVIS
IPC分类号： G10L19/06 , G10L19/025 , G10L19/018
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.
摘要翻译： 公开了一种用于对表示N个音频通道的M个编码音频通道进行解码的音频解码器中执行的方法。 该方法包括接收包含M个编码的音频信道和一组空间参数的比特流，对M个编码的音频信道进行解码，以及从比特流中提取一组空间参数。 该方法还包括分析M个音频通道以检测瞬态的位置，去相关M个音频通道，以及从M个音频通道和一组空间参数导出N个音频通道。 第一解相关技术被应用于每个音频通道的第一子集，并且第二去相关技术被应用于每个音频通道的第二子集。 第一解相关技术代表解相关器的第一操作模式，第二去相关技术代表去相关器的第二操作模式。
-
公开(公告)号：US20160189718A1
公开(公告)日：2016-06-30
申请号：US15060382
申请日：2016-03-03
发明人： Mark F. DAVIS
IPC分类号： G10L19/005 , 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： Multiple channels of audio are combined either to a monophonic composite signal or to multiple channels of audio along with related auxiliary information from which multiple channels of audio are reconstructed, including improved downmixing of multiple audio channels to a monophonic audio signal or to multiple audio channels and improved decorrelation of multiple audio channels derived from a monophonic audio channel or from multiple audio channels. Aspects of the disclosed invention are usable in audio encoders, decoders, encode/decode systems, downmixers, upmixers, and decorrelators.
-
公开(公告)号：US20190297445A1
公开(公告)日：2019-09-26
申请号：US16439670
申请日：2019-06-12
发明人： Mark F. DAVIS
IPC分类号： 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.
-
公开(公告)号：US20180359596A1
公开(公告)日：2018-12-13
申请号：US15777058
申请日：2016-11-17
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 , H04R5/033 , H04S3/00
CPC分类号： H04S7/304 , G10L19/008 , H04R5/033 , H04S3/004 , H04S3/008 , H04S2400/01 , H04S2400/11 , H04S2420/01 , H04S2420/03
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.
-
公开(公告)号：US20150365775A1
公开(公告)日：2015-12-17
申请号：US14761906
申请日：2014-01-17
IPC分类号： H04R29/00
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）。
-
公开(公告)号：US20240284104A1
公开(公告)日：2024-08-22
申请号：US18592447
申请日：2024-02-29
CPC分类号： H04R5/033 , H04S7/304 , H04R2205/022 , H04R2205/024 , H04S2420/01 , H04S2420/03 , H04S2420/11
摘要： An apparatus and method of rendering audio. A binaural signal is split on an amplitude weighting basis into a front binaural signal and a rear binaural signal, based on perceived position information of the audio. In this manner, the front-back differentiation of the binaural signal is improved.
-
公开(公告)号：US20240098438A1
公开(公告)日：2024-03-21
申请号：US18474170
申请日：2023-09-25
发明人： Mark F. DAVIS
IPC分类号： 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.
-
-
-
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.024 秒)
