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1. 发明公开

EP3535987A1 METHODS AND SYSTEMS FOR DETERMINING AND/OR USING AN AUDIO FILTER BASED ON HEAD-TRACKING DATA 审中-公开
公开(公告)号：EP3535987A1
公开(公告)日：2019-09-11
申请号：EP17866956.0
申请日：2017-10-24
申请人： Dirac Research AB
发明人： CASIMIRO ERICSSON, Nilo , SMAILAGIC, Sead
IPC分类号： H04S7/00 , G06F3/01

2. 发明公开

EP2257083A1 Sound field control in multiple listening regions 有权
标题翻译： Schallfeldsteuerung mit mehrerenHörbereichen
公开(公告)号：EP2257083A1
公开(公告)日：2010-12-01
申请号：EP09007142.4
申请日：2009-05-28
申请人： Dirac Research AB
发明人： Brännmark, Lars-Johan , Sternad, Mikael , Johansson, Mathias
IPC分类号： H04S7/00
CPC分类号： H04S7/301
摘要： The invention provides a scheme to design an audio precompensation controller for a multichannel audio system, with a prescribed number N of loudspeakers in prescribed positions so that listeners positioned in any of P>1 spatially extended listening regions should be given the illusion of being in another acoustic environments that has L sound sources (virtual loudspeakers) located at prescribed positions in a prescribed room acoustics. The invention provides a unified joint solution to the problems of equalizer design, crossover design, delay and level calibration, sum-response optimization and up-mixing. A multi-input multi-output audio precompensation controller is designed for an associated sound generating system comprising a limited number of loudspeaker inputs for emulating a number of virtual sound sources. The scheme for designing is based on: (S1) estimating, for each loudspeaker input signals, an impulse response at each of a set of measurement positions that cover the P listening regions; (S2) specifying a target impulse response (target stages) for each virtual sound source at each measurement position; and (S3) determining adjustable filter parameters of the audio precompensation controller so that a criterion function is optimized. The criterion function includes a weighted summation of powers of differences between the compensated estimated impulse responses and the target impulse responses over a discrete grid of said M measurement positions. This optimization can furthermore be iterated with a tuning of adjustable parameters in the target stages to improve the attainable criterion value and the accuracy of the compensation.
摘要翻译：本发明提供了一种用于设计用于多声道音频系统的音频预补偿控制器的方案，其中规定数量的N个扬声器处于规定位置，使得位于P> 1空间延伸收听区域中的任何一个的听众应被给予处于另一个在规定的房间声学中具有L个声源（虚拟扬声器）的规定位置的声学环境。本发明为均衡器设计，交叉设计，延迟和电平校准，求和响应优化和上混等问题提供了统一的联合解决方案。多输入多输出音频预补偿控制器被设计用于相关联的声音产生系统，其包括用于模拟多个虚拟声源的有限数量的扬声器输入。设计方案基于：（S1）针对每个扬声器输入信号估计覆盖P个听音区域的一组测量位置中的每一个处的脉冲响应; （S2），指定每个测量位置处的每个虚拟声源的目标脉冲响应（目标级）; 和（S3）确定音频预补偿控制器的可调节滤波器参数，使得准则函数被优化。标准函数包括在所述M个测量位置的离散网格上的补偿的估计脉冲响应与目标脉冲响应之间的差的功率的加权求和。此外，可以通过调整目标阶段中的可调参数来改进该优化，以提高可达到的标准值和补偿的准确性。

3. 发明公开

EP1355509A2 Digital audio precompensation 有权
标题翻译： Digitale Audiovorkompensierung
公开(公告)号：EP1355509A2
公开(公告)日：2003-10-22
申请号：EP03003083.7
申请日：2003-02-13
申请人： Dirac Research AB
发明人： Sternad, Mikael , Ahlen, Anders
IPC分类号： H04R3/04
CPC分类号： H04R3/04 , H04R29/007 , H04S7/307
摘要： The invention concerns digital audio precompensation, and particularly the design of digital precompensation filters. The invention proposes an audio precompensation filter design scheme that uses a novel class of design criteria. Briefly, filter parameters are determined based on a weighting between, on one hand, approximating the precompensation filter to a fixed, non-zero filter component and, on the other hand, approximating the precompensated model response to a reference system response. For design purposes, the precompensation filter is preferably regarded as additively comprising a fixed, non-zero component and an adjustable compensator component. The fixed component is normally configured by the filter designer, whereas the adjustable compensator component is determined by optimizing a criterion function involving the above weighting. The weighting can be made frequency- and/or channel-dependent to provide a very powerful tool for effectively controlling the extent and amount of compensation to be performed in different frequency regions and/or in different channels.
摘要翻译：本发明涉及数字音频预补偿，特别是数字预补偿滤波器的设计。本发明提出了一种使用新颖设计标准的音频预补偿滤波器设计方案。简而言之，滤波器参数是基于一方面将预补偿滤波器近似为固定的非零滤波器分量之间的加权来确定的，另一方面，近似预参考系统响应的预补偿模型响应。为了设计目的，预补偿滤波器优选地被认为是附加地包括固定的，非零分量和可调补偿器分量。固定分量通常由滤波器设计器构成，而可调节补偿器分量通过优化涉及上述加权的标准函数来确定。加权可以是频率和/或信道相关的，以提供用于有效控制在不同频率区域和/或不同信道中执行的补偿的范围和量的非常强大的工具。

4. 发明公开

EP2692155A1 AUDIO PRECOMPENSATION CONTROLLER DESIGN USING A VARIABLE SET OF SUPPORT LOUDSPEAKERS 有权
标题翻译：设计一种用于具有设置为支持扬声器A变量AUDIOVORKOMPENSIERUNGSSTEUERUNG
公开(公告)号：EP2692155A1
公开(公告)日：2014-02-05
申请号：EP12872014.1
申请日：2012-03-22
申请人： Dirac Research AB
发明人： BRÄNNMARK, Lars-Johan , AHLÉN, Anders , BAHNE, Adrian
IPC分类号： H04S7/00 , H04R3/04 , H03G5/00
CPC分类号： H04R3/04 , H04S5/00 , H04S7/301 , H04S7/305
摘要： Disclosed is a method and a system to determine an audio precompensation controller for an associated sound generating system including a total of N≧2 loudspeakers, each having a loudspeaker input. The audio precompensation controller has a number L≧1 inputs for L input signals and N outputs for N controller output signals, one to each loudspeaker. For each one of at least a subset of the N loudspeaker inputs, an impulse response is estimated at each measurement position. For each one of the L input signal(s), a selected one of the N loudspeakers is specified as a primary loudspeaker and a selected subset S including at least one of the N loudspeakers as support loudspeaker(s).
摘要翻译：公开的是一种方法和一种系统，以确定性矿为相关联的声音生成系统的预补偿音频控制器包括得到一共N≧2个扬声器，每一个都具有扬声器输入。音频预补偿控制器具有数L为N个控制器的输出信号，一个到每个扬声器L个输入信号和N个输出≧1个输入。对于至少的N扬声器输入的子集的每一个，以脉冲响应估计在每个测量位置。对于L个输入信号（S）的每一个，所述N个扬声器的所选择的一个被指定为主扬声器和一个选定的子集S包括N个扬声器作为支持扩音器中的至少一个。

5. 发明公开

EP1355509A3 Digital audio precompensation 有权
标题翻译：数字音频预补偿
公开(公告)号：EP1355509A3
公开(公告)日：2004-05-06
申请号：EP03003083.7
申请日：2003-02-13
申请人： Dirac Research AB
发明人： Sternad, Mikael , Ahlen, Anders
IPC分类号： H04R3/04
CPC分类号： H04R3/04 , H04R29/007 , H04S7/307
摘要： The invention concerns digital audio precompensation, and particularly the design of digital precompensation filters. The invention proposes an audio precompensation filter design scheme that uses a novel class of design criteria. Briefly, filter parameters are determined based on a weighting between, on one hand, approximating the precompensation filter to a fixed, non-zero filter component and, on the other hand, approximating the precompensated model response to a reference system response. For design purposes, the precompensation filter is preferably regarded as additively comprising a fixed, non-zero component and an adjustable compensator component. The fixed component is normally configured by the filter designer, whereas the adjustable compensator component is determined by optimizing a criterion function involving the above weighting. The weighting can be made frequency- and/or channel-dependent to provide a very powerful tool for effectively controlling the extent and amount of compensation to be performed in different frequency regions and/or in different channels.
摘要翻译：本发明涉及数字音频预补偿，特别涉及数字预补偿滤波器的设计。本发明提出一种使用一类新颖设计标准的音频预补偿滤波器设计方案。简而言之，基于一方面将预补偿滤波器逼近固定的非零滤波器分量并且另一方面将预补偿的模型响应逼近参考系统响应之间的权重来确定滤波器参数。为了设计的目的，预补偿滤波器优选被认为是附加地包括固定的非零部件和可调补偿器部件。固定部件通常由滤波器设计者配置，而可调补偿器部件通过优化涉及上述加权的标准函数来确定。权重可以取决于频率和/或通道，以提供非常有效的工具来有效地控制在不同频率区域和/或不同通道中执行的补偿的范围和数量。

6. 发明公开

EP3183892A1 PERSONAL MULTICHANNEL AUDIO PRECOMPENSATION CONTROLLER DESIGN 有权转让
标题翻译：个人多通道音频预加控制器设计
公开(公告)号：EP3183892A1
公开(公告)日：2017-06-28
申请号：EP14900064.8
申请日：2014-08-21
申请人： Dirac Research AB
发明人： BAHNE, Adrian , AHLÉN, Anders
IPC分类号： H04S7/00 , H04R5/00
CPC分类号： H04S7/305 , H04R3/12 , H04S7/301 , H04S7/302 , H04S2400/01
摘要： Disclosed is a method for determining filter coefficients of an audio precompensation controller for the compensation of an associated sound system, including N≧2 loudspeakers, including estimating, for each one of at least a pair of the loudspeakers, a model transfer function at each of M control points distributed in Z≧2 spatially separated listening zones in a listening environment of the sound system. The method also includes determining, for each of the M control points, a zone-dependent target transfer function at least based on the zone affiliation of the control point; and determining the filter coefficients of the audio precompensation controller at least based on the model transfer functions and the target transfer functions of the M control points. Consequently, an audio precompensation controller for an associated sound system can be obtained that enables improved and/or customized sound reproduction in two or more listening zones simultaneously.
摘要翻译：提供了一种用于确定用于补偿相关联的音响系统的音频预补偿控制器的滤波器系数的方法，包括N≥2个扬声器。该方法包括以下步骤：对于至少一对扬声器中的每一个，估计（S1）在分配给在聆听环境中的Z≥2个空间分离的聆听区域中的M个控制点中的每个控制点处的模型传递函数音响系统。该方法还包括以下步骤：至少基于控制点的区域归属来针对M个控制点中的每一个确定（S2）区域相关目标传递函数; 以及至少基于M个控制点的模型传递函数和目标传递函数来确定（S3）音频预补偿控制器的滤波器系数的步骤。以这种方式，可以获得用于相关声音系统的音频预补偿控制器，该控制器能够同时在两个或更多个收听区域中改进和/或定制声音再现。

7. 发明授权

EP2104374B1 Spatially robust audio precompensation 有权
标题翻译：空间稳健的音频预补偿
公开(公告)号：EP2104374B1
公开(公告)日：2010-05-05
申请号：EP08102812.8
申请日：2008-03-20
申请人： Dirac Research AB
发明人： Brännmark, Lars Johan , Sternad, Mikael , Ahlén, Anders
IPC分类号： H04R3/04 , H04S7/00
CPC分类号： H04R3/04 , H04S7/307

8. 发明授权

EP3369259B1 REDUCING THE PHASE DIFFERENCE BETWEEN AUDIO CHANNELS AT MULTIPLE SPATIAL POSITIONS 有权转让
公开(公告)号：EP3369259B1
公开(公告)日：2020-05-27
申请号：EP15907398.0
申请日：2015-10-30
申请人： Dirac Research AB
发明人： BRÄNNMARK, Lars-Johan , ÅGREN, Jakob
IPC分类号： H04S7/00 , H04S1/00 , H04S3/00

9. 发明授权

EP2870782B1 AUDIO PRECOMPENSATION CONTROLLER DESIGN WITH PAIRWISE LOUDSPEAKER SYMMETRY 有权
公开(公告)号：EP2870782B1
公开(公告)日：2020-04-08
申请号：EP13813994.4
申请日：2013-06-20
申请人： Dirac Research AB
发明人： BAHNE, Adrian , BRÄNNMARK, Lars-Johan , AHLÉN, Anders
IPC分类号： H04S7/00 , H04R3/04 , H04R3/12 , H04R5/04

10. 发明公开

EP3607548A1 A NOVEL PARAMETRIC EQUALIZATION FOR AUDIO APPLICATIONS 审中-公开
公开(公告)号：EP3607548A1
公开(公告)日：2020-02-12
申请号：EP17904656.0
申请日：2017-04-07
申请人： Dirac Research AB
发明人： ARLBRANT, Mattias
IPC分类号： G10L19/008 , H04S7/00

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