公开(公告)号：WO2012025283A1

公开(公告)日：2012-03-01

申请号：PCT/EP2011/061361

申请日：2011-07-06

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  KUNTZ, Achim ,  DISCH, Sascha ,  HERRE, Jürgen ,  KUECH, Fabian ,  HILPERT, Johannes

Inventor： KUNTZ, Achim ,  DISCH, Sascha ,  HERRE, Jürgen ,  KUECH, Fabian ,  HILPERT, Johannes

IPC: G10L19/00

CPC classification number: G10L19/0017 ,  G10L19/008 ,  G10L19/025

Abstract: An apparatus for generating a decorrelated signal comprising a receiving unit (650) for receiving phase information, a transient separator (310; 410; 510; 610; 710; 910), a transient decorrelator (320; 420; 520; 620; 720; 920), a second decorrelator (330; 430; 530; 630; 730; 930) and a combining unit (340; 440; 540; 640; 740; 940), wherein the transient separator (310; 410; 510; 610; 710; 910) is adapted to separate an input signal into a first signal component and into a second signal component such that the first signal component comprises transient signal portions of the input signal and such that the second signal component comprises non-transient signal portions of the input signal. The transient decorrelator (320; 420; 520; 620; 720; 920) is adapted to apply the phase information received by the receiving unit (650) to a transient signal component.

Abstract translation: 一种用于产生去相关信号的装置，包括用于接收相位信息的接收单元（650），瞬态分离器（310; 410; 510; 610; 710; 910），瞬态去相关器（320; 420; 520; 620; 720; 920），第二去相关器（330; 430; 530; 630; 730; 930）和组合单元（340; 440; 540; 640; 740; 940） 710; 910）适于将输入信号分离成第一信号分量和第二信号分量，使得第一信号分量包括输入信号的瞬态信号部分，并且使得第二信号分量包括非瞬态信号部分 输入信号。 瞬态解相关器（320; 420; 520; 620; 720; 920）适于将由接收单元（650）接收的相位信息应用于瞬态信号分量。

公开(公告)号：WO2010115845A1

公开(公告)日：2010-10-14

申请号：PCT/EP2010/054434

申请日：2010-04-01

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  NAGEL, Frederik ,  MULTRUS, Markus ,  LECOMTE, Jérémie ,  BAYER, Stefan ,  FUCHS, Guillaume ,  HILPERT, Johannes ,  ROBILLIARD, Julien

Inventor： NAGEL, Frederik ,  MULTRUS, Markus ,  LECOMTE, Jérémie ,  BAYER, Stefan ,  FUCHS, Guillaume ,  HILPERT, Johannes ,  ROBILLIARD, Julien

IPC: G10L21/02 ,  G10L19/14

CPC classification number: G10L19/008 ,  G10L19/18 ,  G10L21/038

Abstract: An apparatus for generating a synthesis audio signal using a patching control signal comprises a first converter, a spectral domain patch generator, a high frequency reconstruction manipulator and a combiner. The first converter is configured for converting a time portion of an audio signal into a spectral representation. The spectral domain patch generator is configured for performing a plurality of different spectral domain patching algorithms, wherein each patching algorithm generates a modified spectral representation comprising spectral components in an upper frequency band derived from corresponding spectral components in a core frequency band of the audio signal. The spectral domain patch generator is furthermore configured to select a first spectral domain patching algorithm from the plurality of patching algorithms for a first time portion and a second spectral domain patching algorithm from the plurality of patching algorithm for a second different time portion in accordance with the patching control signal to obtain the modified spectral representation. The high frequency reconstruction manipulator is configured for manipulating the modified spectral representation or a signal derived from the modified spectral representation in accordance with a spectral band replication parameter to obtain a bandwidth extended signal. Finally, the combiner is configured for combining the audio signal having spectral components in the core frequency band or a signal derived from the audio signal with the bandwidth extended signal to obtain the synthesis audio signal.

Abstract translation: 使用补丁控制信号产生合成音频信号的装置包括第一转换器，频域补丁发生器，高频重构操纵器和组合器。 第一转换器被配置为将音频信号的时间部分转换为频谱表示。 频域补丁生成器被配置用于执行多个不同的频域修补算法，其中每个修补算法生成修改的频谱表示，该修改的频谱表示包括从音频信号的核心频带中的相应频谱分量导出的上频带中的频谱分量。 频域补丁生成器还被配置为根据来自第一时间部分的多个修补算法和来自用于第二不同时间部分的多个修补算法的第二频域修补算法来选择第一频域修补算法 修补控制信号以获得修改的光谱表示。 高频重建操纵器被配置为根据频谱带复制参数来操纵修改的频谱表示或从修改的频谱表示导出的信号，以获得带宽扩展信号。 最后，组合器被配置为将具有核心频带中的频谱分量的音频信号或从音频信号导出的信号与带宽扩展信号组合以获得合成音频信号。

公开(公告)号：WO2010086216A1

公开(公告)日：2010-08-05

申请号：PCT/EP2010/050279

申请日：2010-01-12

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  NEUSINGER, Matthias ,  ROBILLIARD, Julien ,  HILPERT, Johannes

Inventor： NEUSINGER, Matthias ,  ROBILLIARD, Julien ,  HILPERT, Johannes

IPC: G10L19/00 ,  H04B1/66

CPC classification number: G10L19/008

Abstract: An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels comprises an upmixer configured to apply temporally variable upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The apparatus also comprises a parameter interpolator, wherein the parameter interpolator is configured to obtain one or more temporally interpolated upmix parameters to be used by the upmixer on the basis of a first complex-valued upmix parameter and a subsequent second complex-valued upmix parameter. The parameter interpolator is configured to separately interpolate between a magnitude value of the first complex-valued upmix parameter and a magnitude value of the second complex-valued upmix parameter, and between a phase value of the first complex-valued upmix parameter and a phase value of the second complex-valued upmix parameter, to obtain the one or more temporally interpolated upmix parameters. A respective method can be implemented, for example, as a computer program.

Abstract translation: 用于将描述一个或多个下混音频通道的缩混音频信号上混合到描述多个上混合音频通道的上混合音频信号的装置包括上混频器，其被配置为应用时间上可变的上混参数来上混合音频信号以获得上混合音频 信号。 该装置还包括参数内插器，其中参数内插器被配置为基于第一复值上混合参数和随后的第二复值上混参数来获得上混合器使用的一个或多个时间插值上混参数。 参数内插器被配置为在第一复值上混参数的幅度值和第二复值上混参数的幅值之间以及第一复值上混参数的相位值和相位值之间分别插值 的第二复值上混参数，以获得一个或多个时间内插的上混参数。 可以将各自的方法例如作为计算机程序来实现。

公开(公告)号：WO2010003575A1

公开(公告)日：2010-01-14

申请号：PCT/EP2009/004719

申请日：2009-06-30

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  HILPERT, Johannes ,  GRILL, Bernhard ,  NEUSINGER, Matthias ,  ROBILLIARD, Julien ,  LUIS-VALERO, Maria

Inventor： HILPERT, Johannes ,  GRILL, Bernhard ,  NEUSINGER, Matthias ,  ROBILLIARD, Julien ,  LUIS-VALERO, Maria

IPC: G10L19/00

CPC classification number: G10L19/008

Abstract: An efficient encoded representation of a first and a second input audio signal can be derived using correlation information indicating a correlation between the first and the second input audio signals, when a signal characterization information, indicating at least a first or a second, different characteristic of the input audio signal is additionally considered. Phase information indicating a phase relation between the first and the second input audio signals is derived, when the input audio signals have the first characteristic. The phase information and a correlation measure are included into the encoded representation when the input audio signals have the first characteristic, and only the correlation information is included into the encoded representation when the input audio signals have the second characteristic.

Abstract translation: 当指示第一和第二输入音频信号的至少第一或第二不同特征的信号表征信息时，可以使用指示第一和第二输入音频信号之间的相关性的相关信息来导出第一和第二输入音频信号的有效编码表示 另外考虑输入音频信号。 当输入音频信号具有第一特性时，导出指示第一和第二输入音频信号之间的相位关系的相位信息。 当输入音频信号具有第一特性时，相位信息和相关度被包括在编码表示中，并且当输入音频信号具有第二特性时，相关信息仅包括在编码表示中。

公开(公告)号：WO2010003564A1

公开(公告)日：2010-01-14

申请号：PCT/EP2009/004652

申请日：2009-06-26

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V ,  VOICEAGE CORPORATION ,  GRILL, Bernhard ,  LEFEBVRE, Roch ,  BESSETTE, Bruno ,  LAPIERRE, Jimmy ,  GOURNAY, Philippe ,  SALAMI, Redwan ,  BAYER, Stefan ,  FUCHS, Guillaume ,  GEYERSBERGER, Stefan ,  GEIGER, Ralf ,  HILPERT, Johannes ,  KRAEMER, Ulrich ,  LECOMTE, Jeremie ,  MULTRUS, Markus ,  NEUENDORF, Max ,  POPP, Harald ,  RETTELBACH, Nikolaus

Inventor： GRILL, Bernhard ,  LEFEBVRE, Roch ,  BESSETTE, Bruno ,  LAPIERRE, Jimmy ,  GOURNAY, Philippe ,  SALAMI, Redwan ,  BAYER, Stefan ,  FUCHS, Guillaume ,  GEYERSBERGER, Stefan ,  GEIGER, Ralf ,  HILPERT, Johannes ,  KRAEMER, Ulrich ,  LECOMTE, Jeremie ,  MULTRUS, Markus ,  NEUENDORF, Max ,  POPP, Harald ,  RETTELBACH, Nikolaus

IPC: G10L19/14

CPC classification number: G10L19/008 ,  G10L19/0017 ,  G10L19/0212 ,  G10L19/173 ,  G10L19/18 ,  G10L2019/0008

Abstract: An audio encoder comprises a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch comprises a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and wherein the second encoding branch furthermore comprises a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder comprises a first domain decoder such as a spectral domain decoding branch, a second domain decoder such as an LPC domain decoding branch for decoding a signal such as an excitation signal in the second domain, and a third domain decoder such as an LPC-spectral decoder branch and two cascaded switches for switching between the decoders.

Abstract translation: 音频编码器包括第一信息宿定向编码分支，诸如频域编码分支，第二信息源或SNR定向编码分支，诸如LPC域编码分支，以及用于在第一编码分支与第二编码分支之间进行切换的开关 编码分支，其中所述第二编码分支包括转换器到不同于所述频域的特定域，例如产生激励信号的LPC分析阶段，并且其中所述第二编码分支还包括特定域编码分支，诸如LPC域处理分支 ，以及诸如LPC频域处理分支的特定频域编码分支，以及用于在特定编码分支和特定频域编码分支之间切换的附加开关。 音频解码器包括诸如频域解码分支的第一域解码器，诸如LPC域解码分支的第二域解码器，用于对诸如第二域中的激励信号的信号进行解码，以及第三域解码器，诸如LPC 光谱解码器分支和两个级联开关，用于在解码器之间切换。

公开(公告)号：WO2008046530A3

公开(公告)日：2008-04-24

申请号：PCT/EP2007/008682

申请日：2007-10-05

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  CODING TECHNOLOGIES AB ,  KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  HILPERT, Johannes ,  LINZMEIER, Karsten ,  HERRE, Jürgen ,  SPERSCHNEIDER, Ralph ,  HÖLZER, Andreas ,  VILLEMOES, Lars ,  ENGDEGARD, Jonas ,  PURNHAGEN, Heiko ,  KJÖRLING, Kristofer ,  BREEBAART, Jeroen ,  OOMEN, Werner

Inventor： HILPERT, Johannes ,  LINZMEIER, Karsten ,  HERRE, Jürgen ,  SPERSCHNEIDER, Ralph ,  HÖLZER, Andreas ,  VILLEMOES, Lars ,  ENGDEGARD, Jonas ,  PURNHAGEN, Heiko ,  KJÖRLING, Kristofer ,  BREEBAART, Jeroen ,  OOMEN, Werner

IPC: G10L19/14 ,  G10L19/00

Abstract: 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 loudspeake 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.

公开(公告)号：WO2008003362A1

公开(公告)日：2008-01-10

申请号：PCT/EP2007/003598

申请日：2007-04-24

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  HILPERT, Johannes ,  HERRE, Juergen ,  LINZMEIER, Karsten ,  HELLMUTH, Oliver ,  KASTNER, Thorsten

Inventor： HILPERT, Johannes ,  HERRE, Juergen ,  LINZMEIER, Karsten ,  HELLMUTH, Oliver ,  KASTNER, Thorsten

IPC: G10L19/00 ,  H04N7/15

CPC classification number: H04N7/15 ,  G10L19/008

Abstract: According to the present invention, multiple parametrically encoded audio signals can be efficiently combined using an audio signal generator (100), which generates an audio output signal (120) by combining the down-mix channels (110a, 112a) and the associated parameters (110b, 112b) of the audio signals directly within the parameter domain, i.e. without reconstructing or decoding the individual input audio signals prior to the generation of the audio output signal (120). This is achieved by direct mixing of the associated down-mix channels (110a, 112a) of the individual input signals. It is one key feature of the present invention that the combination of the down-mix channels (110a, 112a) is achieved by simple, computationally inexpensive arithmetic operations.

Abstract translation: 根据本发明，可以使用音频信号发生器（100）有效地组合多个参数编码的音频信号，音频信号发生器（100）通过组合下混频道（110a，112a）和相关联的参数（ 110b，112b）直接在参数域内，即在生成音频输出信号（120）之前不重建或解码各个输入音频信号。 这通过直接混合各个输入信号的相关联的下混通道（110a，112a）来实现。 本发明的一个关键特征是通过简单的，计算上便宜的算术运算来实现降混混频道（110a，112a）的组合。

公开(公告)号：WO2010149700A1

公开(公告)日：2010-12-29

申请号：PCT/EP2010/058906

申请日：2010-06-23

Applicant: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  HELLMUTH, Oliver ,  FALCH, Cornelia ,  HERRE, Jürgen ,  HILPERT, Johannes ,  RIDDERBUSCH, Falko ,  TERENTIEV, Leonid

Inventor： HELLMUTH, Oliver ,  FALCH, Cornelia ,  HERRE, Jürgen ,  HILPERT, Johannes ,  RIDDERBUSCH, Falko ,  TERENTIEV, Leonid

IPC: G10L19/00 ,  G10L19/14 ,  H04S7/00

CPC classification number: G10L19/20 ,  G10H1/361 ,  G10H2210/301 ,  G10L19/008 ,  H04S7/30 ,  H04S2400/11 ,  H04S2420/07

Abstract: An audio signal decoder for providing an upmix signal representation in dependence on a downmix signal representation and an object-related parametric information comprises an object separator configured to decompose the downmix signal representation, to provide a first audio information describing a first set of one or more audio objects of a first audio object type and a second audio information describing a second set of one or more audio objects of a second audio object type, in dependence on the downmix signal representation and using at least a part of the object-related parametric information. The audio signal decoder also comprises an audio signal processor configured to receive the second audio information and to process the second audio information in dependence on the object-related parametric information, to obtain a processed version of the second audio information. The audio signal decoder also comprises an audio signal combiner configured to combine the first audio information with the processed version of the second audio information, to obtain the upmix signal representation.

Abstract translation: 音频信号解码器，用于根据降混信号表示和对象相关的参数信息提供上混合信号表示，包括被配置成分解下混合信号表示的对象分离器，以提供描述第一组一个或多个 第一音频对象类型的音频对象和描述第二音频对象类型的一个或多个音频对象的第二组的第二音频信息，其依赖于下混合信号表示，并且使用至少一部分与对象相关的参数信息 。 音频信号解码器还包括音频信号处理器，该音频信号处理器被配置为接收第二音频信息并根据对象相关参数信息处理第二音频信息，以获得第二音频信息的处理版本。 音频信号解码器还包括被配置为组合第一音频信息和第二音频信息的处理版本的音频信号组合器，以获得上混合信号表示。

公开(公告)号：WO2010086218A1

公开(公告)日：2010-08-05

申请号：PCT/EP2010/050287

申请日：2010-01-12

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  NEUSINGER, Matthias ,  ROBILLIARD, Julien ,  HILPERT, Johannes

Inventor： NEUSINGER, Matthias ,  ROBILLIARD, Julien ,  HILPERT, Johannes

IPC: G10L19/00

CPC classification number: G10L19/008

Abstract: An upmixer for upmixing a downmix audio signal into an upmixed audio signal describing one or more upmixed audio channels comprises a parameter applier configured to apply upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The parameter applier is configured to apply a phase shift to the downmix audio signal to obtain a phase-shifted version of the downmix audio signal, while leaving a decorrelated signal unmodified by the phase shift. The parameter applier is further configured to combine the phase-shifted version of the downmix audio signal with the decorrelated signal to obtain the upmixed audio signal.

Abstract translation: 用于将缩混音频信号上混合到描述一个或多个上混音频通道的上混合音频信号的上混混器包括配置用于施加上混参数以混合下混音频信号以便获得上混合音频信号的参数施加器。 参数施加器被配置为将相移应用于下混音频信号以获得下混音频信号的相移版本，同时保留未被相移修改的解相关信号。 参数施加器还被配置为将降混音频信号的相移版本与解相关信号组合以获得上混音频信号。

公开(公告)号：WO2009049896A8

公开(公告)日：2010-05-27

申请号：PCT/EP2008008800

申请日：2008-10-17

Applicant: FRAUNHOFER GES FORSCHUNG ,  HELLMUTH OLIVER ,  HERRE JUERGEN ,  TERENTIEV LEONID ,  HOELZER ANDREAS ,  FALCH CORNELIA ,  HILPERT JOHANNES

Inventor： HELLMUTH OLIVER ,  HERRE JUERGEN ,  TERENTIEV LEONID ,  HOELZER ANDREAS ,  FALCH CORNELIA ,  HILPERT JOHANNES

IPC: G10L19/00

CPC classification number: G10L19/04 ,  G10L19/008 ,  G10L19/20 ,  H04S3/002 ,  H04S2420/03 ,  H04S2420/07

Abstract: A method for decoding a multi-audio-object signal having an audio signal of a first type and an audio signal of a second type encoded therein is described, the multi-audio- object signal consisting of a downmix signal (112) and side information, the side information comprising level information of the audio signal of the first type and the audio signal of the second type in a first predetermined time/frequency resolution, the method comprising computing a prediction coefficient matrix C based on the level information (OLD); and up-mixing the downmix signal based on the prediction coefficients to obtain a first up-mix audio signal approximating the audio signal of the first type and/or a second up-mix audio signal approximating the audio signal of the second type, wherein the up-mixing yields the first up-mix signal S1 and/or the second up-mix signal S2 from the downmix signal d according to a computation representable by (formula) where the '1' denotes - depending on the number of channels of d - a scalar, or an identity matrix, and D-1 is a matrix uniquely determined by a downmix prescription according to which the audio signal of the first type and the audio signal of the second type are downmixed into the downmix signal, and which is also comprised by the side information, and H is a term being independent from d.

Abstract translation: 描述了一种用于解码具有第一类型的音频信号和其中编码的第二类型的音频信号的多音频对象信号的方法，所述多音频对象信号由下混合信号（112）和侧信息 所述侧信息包括第一类型的音频信号的电平信息和第一类型的音频信号在第一预定时间/频率分辨率中，所述方法包括基于电平信息（OLD）计算预测系数矩阵C; 以及基于所述预测系数对所述下混合信号进行上混合以获得近似所述第一类型的音频信号的第一上混合音频信号和/或接近所述第二类型的音频信号的第二混音音频信号，其中， 根据通过（公式）表示的计算，上下混合产生来自下混合信号d的第一上混合信号S1和/或第二上混合信号S2，其中'1'表示 - 取决于d的信道数 - 标量或单位矩阵，D-1是由缩混处方唯一确定的矩阵，根据该矩阵，第一类型的音频信号和第二类型的音频信号被下混合到下混合信号中，并且其是 也由边信息组成，H是独立于d的术语。