公开(公告)号：US20160005413A1

公开(公告)日：2016-01-07

申请号：US14767565

申请日：2014-01-22

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Matthew FELLERS ,  Vinay MELKOTE ,  Kuan-Chieh YEN ,  Grant A. DAVIDSON ,  Mark F. DAVIS

IPC: G10L19/02 ,  G10L19/012 ,  G10L25/18 ,  G10L19/008 ,  G10L25/06

CPC classification number: G10L19/008 ,  G10L19/012 ,  G10L19/0204 ,  G10L25/06 ,  G10L25/18

Abstract: 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.

Abstract translation: 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：US20150371646A1

公开(公告)日：2015-12-24

申请号：US14767867

申请日：2014-01-22

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Vinay MELKOTE ,  Kuan-Chieh YEN ,  Matthew FELLERS ,  Grant A. DAVIDSON ,  Vivek KUMAR

IPC: G10L19/008 ,  G10L25/06 ,  G10L25/09 ,  H04S3/00

CPC classification number: G10L19/008 ,  G10H2250/061 ,  G10H2250/225 ,  G10H2250/575 ,  G10L25/06 ,  G10L25/09 ,  H04S3/008 ,  H04S5/00 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2420/03 ,  H04S2420/07

Abstract: Decorrelation filter parameters for audio data may be based, at least in part, on audio characteristics such as tonality information and/or transient information. Determining the audio characteristics may involve receiving explicit audio characteristics with the audio data and/or determining audio characteristics based on one or more attributes of the audio data. The decorrelation filter parameters may include dithering parameters and/or randomly selected pole locations for at least one pole of an all-pass filter. The dithering parameters and/or pole locations may involve a maximum stride value for pole movement. In some examples, the maximum stride value may be substantially zero for highly tonal signals of the audio data. The dithering parameters and/or pole locations may be bounded by constraint areas within which pole movements are constrained. The constraint areas may or may not be fixed. In some implementations, different channels of the audio data may share the same constraint areas.

Abstract translation: 音频数据的解相关滤波器参数可以至少部分地基于诸如音调信息和/或瞬态信息的音频特性。 确定音频特征可以包括基于音频数据的一个或多个属性来接收具有音频数据的显式音频特征和/或确定音频特性。 去相关滤波器参数可以包括全通滤波器的至少一个极点的抖动参数和/或随机选择的极点位置。 抖动参数和/或极点位置可能涉及极运动的最大步幅值。 在一些示例中，对于音频数据的高音调信号，最大步幅值可以基本为零。 抖动参数和/或极点位置可以限制极限运动受限制的约束区域。 约束区域可以是或可以不是固定的。 在一些实现中，音频数据的不同频道可以共享相同的约束区域。

公开(公告)号：US20200245094A1

公开(公告)日：2020-07-30

申请号：US16777599

申请日：2020-01-30

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. COOPER ,  Zhiwei SHUANG

IPC: H04S7/00 ,  G10L19/008 ,  H04S3/00

Abstract: In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

公开(公告)号：US20160345116A1

公开(公告)日：2016-11-24

申请号：US15109541

申请日：2014-12-18

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. Cooper ,  Zhiwei SHUANG

IPC: H04S7/00 ,  G10L19/008

Abstract: In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feed-back delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

Abstract translation: 在一些实施例中，用于响应多声道音频信号的信道产生双耳信号的虚拟化方法，其通过使用至少一个反馈延迟网络（FDN）向每个信道应用双耳房间脉冲响应（BRIR） 将通用的后期混响应用于频道的混合。 在一些实施例中，输入信号信道在第一处理路径中被处理以向每个信道应用用于信道的单信道BRIR的直接响应和早期反射部分，并且在第二处理路径中处理信道的混合，包括 至少一个FDN应用公共的后期混响。 通常，常见的后期混响模拟了至少一些单通道BRIR的后期混响部分的集体宏属性。 其他方面是被配置为执行该方法的任何实施例的耳机虚拟器。

公开(公告)号：US20160337779A1

公开(公告)日：2016-11-17

申请号：US15109557

申请日：2014-12-23

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

CPC classification number: H04S7/304 ,  H04S7/306 ,  H04S2400/03 ,  H04S2420/01 ,  H04S2420/07

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

Abstract translation: 用于设计用于耳机虚拟器的双耳室脉冲响应（BRIR）的方法和系统以及响应于多声道音频信号的一组声道产生双耳信号的方法和系统，包括通过将BRIR应用于每个声道 从而产生经滤波的信号，并且组合滤波的信号以产生双耳信号，其中根据设计方法的实施例设计了每个BRIR。 其他方面是被配置为执行本发明方法的任何实施例的音频处理单元。 根据一些实施例，BRIR设计被形成为基于模拟模型（其产生候选BRIR）和至少一个目标函数（其评估每个候选BRIR）的数值优化问题，并且包括识别最佳候选者 BRIR由每个目标函数为候选BRIR确定的性能度量指示。

公开(公告)号：US20230262409A1

公开(公告)日：2023-08-17

申请号：US18106261

申请日：2023-02-06

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

CPC classification number: H04S7/304 ,  H04S7/306 ,  H04S2420/01 ,  H04S2400/03 ,  H04S2420/07

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

公开(公告)号：US20210051435A1

公开(公告)日：2021-02-18

申请号：US17012076

申请日：2020-09-04

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. COOPER ,  Zhiwei SHUANG

IPC: H04S7/00 ,  G10L19/008 ,  H04S3/00

Abstract: In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

公开(公告)号：US20190373397A1

公开(公告)日：2019-12-05

申请号：US16541079

申请日：2019-08-14

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART ,  Grant A. DAVIDSON ,  Rhonda WILSON ,  David M. Cooper ,  Zhiwei SHUANG

IPC: H04S7/00 ,  G10L19/008

Abstract: In some embodiments, virtualization methods for generating a binaural signal in response to channels of a multi-channel audio signal, which apply a binaural room impulse response (BRIR) to each channel including by using at least one feedback delay network (FDN) to apply a common late reverberation to a downmix of the channels. In some embodiments, input signal channels are processed in a first processing path to apply to each channel a direct response and early reflection portion of a single-channel BRIR for the channel, and the downmix of the channels is processed in a second processing path including at least one FDN which applies the common late reverberation. Typically, the common late reverberation emulates collective macro attributes of late reverberation portions of at least some of the single-channel BRIRs. Other aspects are headphone virtualizers configured to perform any embodiment of the method.

公开(公告)号：US20200162835A1

公开(公告)日：2020-05-21

申请号：US16749494

申请日：2020-01-22

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Grant A. DAVIDSON ,  Kuan-Chieh YEN ,  Dirk Jeroen BREEBAART

IPC: H04S7/00

Abstract: Methods and systems for designing binaural room impulse responses (BRIRs) for use in headphone virtualizers, and methods and systems for generating a binaural signal in response to a set of channels of a multi-channel audio signal, including by applying a BRIR to each channel of the set, thereby generating filtered signals, and combining the filtered signals to generate the binaural signal, where each BRIR has been designed in accordance with an embodiment of the design method. Other aspects are audio processing units configured to perform any embodiment of the inventive method. In accordance with some embodiments, BRIR design is formulated as a numerical optimization problem based on a simulation model (which generates candidate BRIRs) and at least one objective function (which evaluates each candidate BRIR), and includes identification of a best one of the candidate BRIRs as indicated by performance metrics determined for the candidate BRIRs by each objective function.

公开(公告)号：US20160133266A1

公开(公告)日：2016-05-12

申请号：US14898211

申请日：2014-06-17

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Vinay MELKOTE ,  Kuan-Chieh YEN ,  Grant A. DAVIDSON

IPC: G10L19/038 ,  H04N19/94 ,  G10L19/008

CPC classification number: G10L19/038 ,  G10L19/008 ,  H04N19/94

Abstract: A first vector quantization process may be applied to two or more parameter values along a first dimension of the N-dimensional parameter set to produce a first set of quantized values. Two or more parameter prediction values may be calculated for a second dimension of the N-dimensional parameter set based, at least in part, on one or more values of the first set of quantized values. Prediction residual values may be calculated based, at least in part, on the parameter prediction values. A second vector quantization process may be applied to the prediction residual values to produce a second set of quantized values. These processes may be extended to any number of dimensions. Corresponding inverse vector quantization processes may be performed.

Abstract translation: 第一矢量量化处理可以沿着N维参数集的第一维应用于两个或更多个参数值，以产生第一组量化值。 可以至少部分地基于第一组量化值的一个或多个值来计算N维参数集的第二维度的两个或更多个参数预测值。 可以至少部分地基于参数预测值来计算预测残差值。 可以将第二矢量量化处理应用于预测残差值以产生第二组量化值。 这些过程可以扩展到任何数量的维度。 可以执行相应的逆矢量量化处理。