公开(公告)号：EP2773088A1

公开(公告)日：2014-09-03

申请号：EP14156902.0

申请日：2014-02-27

申请人： Dolby International AB ,  DOLBY LABORATORIES LICENSING CORPORATION

发明人： Cartwright, Richard J. ,  Johnston, Craig ,  Dickins, Glenn N. ,  Purnhagen, Heiko

IPC分类号： H04M3/56 ,  G10L19/008

CPC分类号： H04N7/152 ,  G10L19/008 ,  G10L25/78 ,  H04M3/567 ,  H04M3/569

摘要： A conferencing server (100) receives incoming bitstreams (I1, 12, 13, 14, 15) carrying media data from respective conferencing endpoints (110, 120, 130, 140, 150); receives a mixing strategy (M) specifying properties of at least one outgoing bitstream (O1 02, 03, 04, 05) and requiring at least one additive media mixing step; and supplies at least one outgoing bitstream by executing, in a processor (103) and a memory (102) with a plurality of memory spaces, a run list of operations selected from a predefined collection of primitives and realizing the received mixing strategy. A pre-processor (104) in the server derives said run list repeatedly and dynamically while taking into consideration determined momentary activity in each incoming bitstream. In embodiments, the run list may be derived by (a) pruning of an initial run list, (b) constrained or non-constrained minimization of a cost function, or (c) automatic code generation.

摘要翻译： 会议服务器（100）从相应的会议端点（110,120,130,140,​​150）接收携带媒体数据的传入比特流（I1，12,13,14,15）; 接收指定至少一个输出比特流（O1 02,03,04,05）的属性并需要至少一个添加介质混合步骤的混合策略（M） 并且通过在具有多个存储器空间的处理器（103）和存储器（102）中执行从预定义的图元集合中选择的操作的运行列表并且实现所接收的混合策略来提供至少一个输出比特流。 服务器中的预处理器（104）在考虑每个输入比特流中确定的瞬时活动的同时，重复地和动态地导出所述运行列表。 在实施例中，可以通过（a）修剪初始运行列表，（b）成本函数的约束或非约束最小化，或（c）自动代码生成来导出运行列表。

公开(公告)号：EP2626855A1

公开(公告)日：2013-08-14

申请号：EP13166660.4

申请日：2010-03-05

申请人： Dolby International AB

发明人： Purnhagen, Heiko ,  Carlsson, Pontus ,  Kjoerling, Kristofer

IPC分类号： G10L19/00 ,  G10L19/008 ,  G10L19/18

CPC分类号： G10L19/002 ,  G10L19/008 ,  G10L19/18 ,  H04S3/02 ,  H04S5/00 ,  H04S5/005 ,  H04S5/02 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2420/03

摘要： The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.

摘要翻译： 本申请涉及音频编码器和解码器系统。 编码器系统的一个实施例包括缩混级用于生成缩混信号和基于立体声信号的残差信号。 此外，编码器系统包括用于确定性的采矿参数立体声参数的参数确定的挖掘阶段：如在信道间的强度差，并声道间交叉相关。 优选地，所述参数立体声参数是时间和频率变化的。 更过，编码器系统包括可变形的阶段。 变换级基因率的伪通过执行变换基于所述缩混信号和残余信号左/右立体声信号。 的伪立体声信号由感知立体声编码器处理。 对于立体声编码，左/右编码或中/侧编码是可选择的。 优选地，左/右立体声编码和中/侧立体声编码之间的选择是时间和频率的变体。

公开(公告)号：EP2437257A1

公开(公告)日：2012-04-04

申请号：EP11195664.5

申请日：2007-10-05

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Koninklijke Philips Electronics N.V. ,  Dolby International AB

发明人： Hilpert, Johannes ,  Breebaart, Jeroen ,  Oomen, Werner ,  Linzmeier, Karsten ,  Herre, Jürgen ,  Sperschneider, Ralph ,  Hoelzer, Andreas ,  Villemos, Lars ,  Engdegard, Jonas ,  Purnhagen, Heiko ,  Kjoerling, Kristofer

IPC分类号： G10L19/14 ,  G10L19/00

CPC分类号： G10L19/173 ,  G10L19/008 ,  H04S2420/03

摘要： A parameter transformer generates level parameters, indicating an energy relation between a first and a second audio channel of a multi-channel audio signal associated to a multi-channel loudspeaker configuration. The level parameter are generated based on object parameters for a plurality of audio objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters comprise an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.

摘要翻译： 参数变换器产生电平参数，指示与多声道扬声器配置相关联的多声道音频信号的第一和第二音频声道之间的能量关系。 基于与使用与音频对象相关联的对象音频信号生成的与下混频道相关联的多个音频对象的对象参数生成电平参数。 对象参数包括指示对象音频信号的能量的能量参数。 为了获得一致性和等级参数，使用参数生成器，它结合能量参数和对象渲染参数，这取决于所需的渲染配置。

公开(公告)号：EP2175671A3

公开(公告)日：2011-01-12

申请号：EP10152627.5

申请日：2005-07-07

申请人： Koninklijke Philips Electronics N.V. ,  Dolby International AB

发明人： Van Loon, Machiel W. ,  Breebart, Dirk J. ,  Hotho, Gerard H. ,  Schuiers, Erik G. P. ,  Purnhagen, Heiko ,  Rödén, Karl J.

IPC分类号： H04S3/02 ,  H04S7/00

CPC分类号： H04S3/02 ,  G10L19/008 ,  H04S1/007 ,  H04S2400/03 ,  H04S2420/03

摘要： A method and a device for processing a stereo signal obtained from an encoder, which codes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L 0 , R 0 ). A first signal and a third signal are added in order to obtain a first output signal (L 0w ), wherein the first signal QL 0wL ) comprises the first stereo signal (L 0 ) modified by a first complex function (g 1 ), and the third signal (L 0wR ) comprises the second stereo signal (R 0 ) modified by a third complex function (g 3 ). A second signal and a fourth signal are added to obtain a second output signal (R 0w ). The fourth signal (R 0wR ) comprises the second stereo signal (R 0 ) modified by a fourth complex function (g 4 ), and the second signal (R 0wL ) comprises the first stereo signal (L 0 ) modified by a second complex function (g 2 ). The complex functions (g 1 ,g 2 ,g 3 ,g 4 ) are functions of the spatial parameters (P) and are chosen such that an energy value of the difference (L 0wL -P 0wL ) between the first signal and the second signal is larger than or equal to the energy value of the sum (L 0wL +R 0wL ) of the first and the second signal and the energy value of the difference (R 0wR -L 0wR ) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R 0wR +L 0wR ) of the fourth signal and the third signal.

公开(公告)号：EP2947653B1

公开(公告)日：2018-10-31

申请号：EP15176778.7

申请日：2011-03-23

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： Purnhagen, Heiko ,  Carlsson, Pontus ,  Villemoes, Lars ,  Robilliard, Julien ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/008 ,  G10L19/04 ,  G10L19/022

CPC分类号： G10L19/04 ,  G10L19/008

摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

公开(公告)号：EP2947657B1

公开(公告)日：2018-10-24

申请号：EP15176785.2

申请日：2011-03-23

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： Purnhagen, Heiko ,  Carlsson, Pontus ,  Villemoes, Lars ,  Robilliard, Julien ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/008 ,  G10L19/04

CPC分类号： G10L19/04 ,  G10L19/008

摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

公开(公告)号：EP2947656B1

公开(公告)日：2018-09-19

申请号：EP15176784.5

申请日：2011-03-23

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： Purnhagen, Heiko ,  Carlsson, Pontus ,  Villemoes, Lars ,  Robilliard, Julien ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/008 ,  G10L19/04 ,  G10L19/00

CPC分类号： G10L19/04 ,  G10L19/008

摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

公开(公告)号：EP2773088B1

公开(公告)日：2018-07-18

申请号：EP14156902.0

申请日：2014-02-27

申请人： Dolby International AB ,  Dolby Laboratories Licensing Corporation

发明人： Cartwright, Richard J. ,  Johnston, Craig ,  Dickins, Glenn N. ,  Purnhagen, Heiko

IPC分类号： H04M3/56 ,  G10L19/008

CPC分类号： H04N7/152 ,  G10L19/008 ,  G10L25/78 ,  H04M3/567 ,  H04M3/569

摘要： A conferencing server (100) receives incoming bitstreams (I1, 12, 13, 14, 15) carrying media data from respective conferencing endpoints (110, 120, 130, 140, 150); receives a mixing strategy (M) specifying properties of at least one outgoing bitstream (O1 02, 03, 04, 05) and requiring at least one additive media mixing step; and supplies at least one outgoing bitstream by executing, in a processor (103) and a memory (102) with a plurality of memory spaces, a run list of operations selected from a predefined collection of primitives and realizing the received mixing strategy. A pre-processor (104) in the server derives said run list repeatedly and dynamically while taking into consideration determined momentary activity in each incoming bitstream. In embodiments, the run list may be derived by (a) pruning of an initial run list, (b) constrained or non-constrained minimization of a cost function, or (c) automatic code generation.

公开(公告)号：EP3093843A1

公开(公告)日：2016-11-16

申请号：EP16176048.3

申请日：2010-09-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： Hölzer, Andreas ,  Herre, Jürgen ,  Hilpert, Johannes ,  Engdegard, Jonas ,  Purnhagen, Heiko

IPC分类号： G10L19/005 ,  G10L19/20 ,  H04S3/02 ,  H04S5/00

CPC分类号： G10L19/008 ,  G10L19/005 ,  G10L19/20 ,  H04S3/02 ,  H04S5/005 ,  H04S2420/03

摘要： An audio signal decoder for providing an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information and in dependence on a rendering information comprises an object parameter determinator. The object parameter determinator is configured to obtain inter-object-correlation values for a plurality of pairs of audio objects. The object parameter determinator is configured to evaluate a bitstream signaling parameter in order to decide whether to evaluate individual inter-object-correlation bitstream parameter values to obtain inter-object-correlation values for a plurality of pairs of related audio objects, or to obtain inter-object-correlation values for a plurality of pairs of related audio objects using a common inter-object-correlation bitstream parameter value. The audio signal decoder also comprises a signal processor configured to obtain the upmix signal representation on the basis of the downmix signal representation and using the inter-object-correlation values for a plurality of pairs of related objects and the rendering information.

摘要翻译： 用于提供对上混的下混合信号表示的基础上，信号表示和所述的音频信号解码器的对象相关的参数信息，并在一个渲染信息相依性包含对象参数确定的。 对象参数确定器被配置以获得用于对音频对象中的多元对象间互相关值。 对象参数确定器被配置成评估一个比特流，以便决定是否要评估个体对象间互相关的比特流的参数值，以获得用于对相关音频对象的一个​​。多个对象间互相关值，或获得除信令参数 用于使用共用对象间互相关位流参数值相关音频对象对一个多元化-object相关值。 音频信号解码器，以便包括被配置为获得所述下混信号表示的基础上，上混信号表示，并使用对象间互相关值对相关对象的多个部分并加以渲染信息的信号处理器。

公开(公告)号：EP2947655A1

公开(公告)日：2015-11-25

申请号：EP15176783.7

申请日：2011-03-23

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： Purnhagen, Heiko ,  Carlsson, Pontus ,  Villemoes, Lars ,  Robilliard, Julien ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/008 ,  G10L19/04 ,  G10L19/00

CPC分类号： G10L19/04 ,  G10L19/008

摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

摘要翻译： 到音频解码器的音频的编码器，并且基于两个音频信道的组合（201,202），以获得第一组合信号（204）作为一个中间信号和其可以使用预测的侧信号导出的残差信号（205） 从信号中间的。 第一组合信号和所述预测残差信号进行编码（209）和写入（212）成数据流（213），在优化目标（208）的基础上通过在优化器（207）导出的所述预测信息（206）连接在一起。 解码器使用所述预测残差信号，所述第一合成信号和所述预测信息来导出一个解码后的第一信道信号和解码的第二信道信号。 在编码器实施例中或在解码器实施例中，实部 - 虚数变换可以应用用于估计所述第一组合信号的频谱的虚部。 用于计算预测残留信号的导出中使用的预测信号，该实值的第一组合信号，乘以的复预测信息和所述第一组合信号的估算虚部实数部分在虚部被-乘以 复杂的预测信息。