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    Layered mixing for sound field conferencing system
    1.
    发明公开
    Layered mixing for sound field conferencing system 有权
    Geschichtete MischungfürSchallfeldkonferenzsystem

    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。

    Layered mixing for sound field conferencing system
    2.
    发明授权
    Layered mixing for sound field conferencing system 有权

    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.

    AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION AND WINDOW SHAPE INFORMATION
    3.
    发明公开
    AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION AND WINDOW SHAPE INFORMATION 审中-公开
    音频编码器，用于进行多声道音频音频解码器和相关方法信号使用复杂的预测与WINDOWS形信息

    公开(公告)号：EP2947653A1

    公开(公告)日：2015-11-25

    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.

    摘要翻译： 到音频解码器的音频编码器，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） 从中间信号导出。 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，第一组合信号和预测信息来导出经解码的第一声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。

    AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION AND DIFFERENCE CODING
    6.
    发明公开
    AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION AND DIFFERENCE CODING 审中-公开
    音频编码器，用于进行多声道音频音频解码器和相关方法信号使用复杂的预测和差分编码

    公开(公告)号：EP2947656A1

    公开(公告)日：2015-11-25

    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.

    摘要翻译： 到音频解码器的音频编码器，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） 从中间信号导出。 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，第一组合信号和预测信息来导出经解码的第一声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。

    AUDIO DECODER AND RELATED METHOD FOR DECODING AN ENCODED MULTI-CHANNEL AUDIO SIGNAL USING COMPLEX PREDICTION
    7.
    发明公开
    AUDIO DECODER AND RELATED METHOD FOR DECODING AN ENCODED MULTI-CHANNEL AUDIO SIGNAL USING COMPLEX PREDICTION 审中-公开
    音频解码器和相关的方法，用于解码经编码的多通道音频信号，通过复预测

    公开(公告)号：EP2947652A1

    公开(公告)日：2015-11-25

    申请号：EP15176776.1

    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 ,  G10L19/02 ,  G10L21/038

    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） 从中间信号导出。 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，第一组合信号和预测信息来导出经解码的第一声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。

    Method, device, encoder apparatus, decoder apparatus and audio system
    9.
    发明授权
    Method, device, encoder apparatus, decoder apparatus and audio system 有权
    方法，设备，编码器，解码器和音频系统

    公开(公告)号：EP2175671B1

    公开(公告)日：2012-05-09

    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 ,  G10L19/00 ,  H04S1/00 ,  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.