公开(公告)号：US08255228B2

公开(公告)日：2012-08-28

申请号：US13004225

申请日：2011-01-11

申请人： Johannes Hilpert ,  Bernhard Grill ,  Matthias Neusinger ,  Julien Robilliard ,  Maria Luis-Valero

发明人： Johannes Hilpert ,  Bernhard Grill ,  Matthias Neusinger ,  Julien Robilliard ,  Maria Luis-Valero

IPC分类号： G10L19/00

CPC分类号： G10L19/008

摘要： 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.

摘要翻译： 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，相位信息和相关测量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：US20100217607A1

公开(公告)日：2010-08-26

申请号：US12694912

申请日：2010-01-27

申请人： Max Neuendorf ,  Jeremie Lecomte ,  Markus Multrus ,  Stefan Bayer ,  Frederik Nagel ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Ralf Geiger ,  Bernhard Grill

发明人： Max Neuendorf ,  Jeremie Lecomte ,  Markus Multrus ,  Stefan Bayer ,  Frederik Nagel ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Ralf Geiger ,  Bernhard Grill

IPC分类号： G06F17/00

CPC分类号： G10L19/022 ,  G10L19/20

摘要： An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

摘要翻译： 一种音频解码器，用于基于音频内容的编码表示来提供音频内容的解码表示，包括线性预测域解码器核心，被配置为基于一组设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数和频域解码器核心，所述频域解码器核心被配置为基于一组频域参数来提供音频帧的时域表示，其考虑从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器，其被配置为对在不同域中编码的后续音频帧进行重叠和相加时域表示，以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口，其特别适用于频域核心模式和线性预测域核心模式之间的转换。

公开(公告)号：US09053700B2

公开(公告)日：2015-06-09

申请号：US13151412

申请日：2011-06-02

申请人： Matthias Neusinger ,  Julien Robilliard ,  Johannes Hilpert

发明人： Matthias Neusinger ,  Julien Robilliard ,  Johannes Hilpert

IPC分类号： H04R5/00 ,  G10L19/008

CPC分类号： G10L19/008 ,  H04S2420/03

摘要： 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 includes an upmixer and a parameter determinator. The upmixer is configured to apply temporally variable upmix parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal, wherein the temporally variable upmix parameters include temporally variable smoothened phase values. The parameter determinator is configured to obtain one or more temporally smoothened upmix parameters for usage by the upmixer on the basis of a quantized upmix parameter input information. The parameter determinator is configured to combine a scaled version of a previous smoothened phase value with a scaled version of an input phase information using a phase change limitation algorithm, to determine a current smoothened phase value on the basis of the previous smoothened phase value and the phase input information.

摘要翻译： 用于将描述一个或多个下混音频通道的下混音频信号上混合到描述多个上混音频通道的上混音频信号中的装置包括上混音器和参数确定器。 上混频器被配置为应用时间上可变的上混参数来上混合音频信号，以便获得上混合音频信号，其中时间上可变上混参数包括时间上可变的平滑相位值。 参数确定器被配置为获得一个或多个时间上平滑的上混参数，以供上混合器基于量化上混参数输入信息使用。 参数确定器被配置为使用相变限制算法将先前平滑相位值的缩放版本与输入相位信息的缩放版本组合，以基于先前平滑相位值确定当前平滑相位值，并且 相输入信息。

公开(公告)号：US08457975B2

公开(公告)日：2013-06-04

申请号：US12694912

申请日：2010-01-27

申请人： Max Neuendorf ,  Jeremie Lecomte ,  Markus Multrus ,  Stefan Bayer ,  Frederik Nagel ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Ralf Geiger ,  Bernhard Grill

发明人： Max Neuendorf ,  Jeremie Lecomte ,  Markus Multrus ,  Stefan Bayer ,  Frederik Nagel ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Ralf Geiger ,  Bernhard Grill

IPC分类号： G10L21/00

CPC分类号： G10L19/022 ,  G10L19/20

摘要： An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

摘要翻译： 一种音频解码器，用于基于音频内容的编码表示来提供音频内容的解码表示，包括线性预测域解码器核心，被配置为基于一组设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数和频域解码器核心，所述频域解码器核心被配置为基于一组频域参数来提供音频帧的时域表示，其考虑从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器，其被配置为对在不同域中编码的后续音频帧进行重叠和相加时域表示，以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口，其特别适用于频域核心模式和线性预测域核心模式之间的转换。

公开(公告)号：US20110238425A1

公开(公告)日：2011-09-29

申请号：US13081223

申请日：2011-04-06

申请人： Max Neuendorf ,  Stefan Bayer ,  Jérémie Lecomte ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Ralf Geiger ,  Markus Multrus ,  Bernhard Grill ,  Philippe Gournay ,  Redwan Salami

发明人： Max Neuendorf ,  Stefan Bayer ,  Jérémie Lecomte ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Ralf Geiger ,  Markus Multrus ,  Bernhard Grill ,  Philippe Gournay ,  Redwan Salami

IPC分类号： G06F17/00

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0212 ,  G10L19/173 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder for encoding an audio signal has a first coding branch, the first coding branch comprising a first converter for converting a signal from a time domain into a frequency domain. Furthermore, the audio encoder has a second coding branch comprising a second time/frequency converter. Additionally, a signal analyzer for analyzing the audio signal is provided. The signal analyzer, on the hand, determines whether an audio portion is effective in the encoder output signal as a first encoded signal from the first encoding branch or as a second encoded signal from a second encoding branch. On the other hand, the signal analyzer determines a time/frequency resolution to be applied by the converters when generating the encoded signals. An output interface includes, in addition to the first encoded signal and the second encoded signal, a resolution information identifying the resolution used by the first time/frequency converter and used by the second time/frequency converter.

摘要翻译： 用于编码音频信号的音频编码器具有第一编码分支，所述第一编码分支包括用于将来自时域的信号转换成频域的第一转换器。 此外，音频编码器具有包括第二时间/频率转换器的第二编码分支。 另外，提供了用于分析音频信号的信号分析器。 手持信号分析仪确定音频部分是否在编码器输出信号中作为来自第一编码分支的第一编码信号或来自第二编码分支的第二编码信号有效。 另一方面，当生成编码信号时，信号分析器确定由转换器施加的时间/频率分辨率。 除了第一编码信号和第二编码信号之外，输出接口包括识别由第一时间/频率转换器使用并由第二时间/频率转换器使用的分辨率的分辨率信息。

公开(公告)号：US08386268B2

公开(公告)日：2013-02-26

申请号：US13107687

申请日：2011-05-13

申请人： Frederik Nagel ,  Markus Multrus ,  Jeremie Lecomte ,  Stefan Bayer ,  Guillaume Fuchs ,  Johannes Hilpert ,  Julien Robilliard

发明人： Frederik Nagel ,  Markus Multrus ,  Jeremie Lecomte ,  Stefan Bayer ,  Guillaume Fuchs ,  Johannes Hilpert ,  Julien Robilliard

IPC分类号： G10L19/00

CPC分类号： G10L19/24 ,  G10L21/038

摘要： An apparatus for generating a synthesis audio signal using a patching control signal has 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 having 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.

摘要翻译： 使用补丁控制信号产生合成音频信号的装置具有第一转换器，频域补丁发生器，高频重建操纵器和组合器。 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具有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的修改频谱表示。 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。

公开(公告)号：US20110255714A1

公开(公告)日：2011-10-20

申请号：US13151412

申请日：2011-06-02

申请人： Matthias NEUSINGER ,  Julien ROBILLIARD ,  Johannes HILPERT

发明人： Matthias NEUSINGER ,  Julien ROBILLIARD ,  Johannes HILPERT

IPC分类号： H04B1/00

CPC分类号： G10L19/008 ,  H04S2420/03

摘要： 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 includes an upmixer and a parameter determinator. The upmixer is configured to apply temporally variable upmix parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal, wherein the temporally variable upmix parameters include temporally variable smoothened phase values. The parameter determinator is configured to obtain one or more temporally smoothened upmix parameters for usage by the upmixer on the basis of a quantized upmix parameter input information. The parameter determinator is configured to combine a scaled version of a previous smoothened phase value with a scaled version of an input phase information using a phase change limitation algorithm, to determine a current smoothened phase value on the basis of the previous smoothened phase value and the phase input information.

摘要翻译： 用于将描述一个或多个下混音频通道的下混音频信号上混合到描述多个上混音频通道的上混音频信号中的装置包括上混音器和参数确定器。 上混频器被配置为应用时间上可变的上混参数来上混合音频信号，以便获得上混合音频信号，其中时间上可变上混参数包括时间上可变的平滑相位值。 参数确定器被配置为获得一个或多个时间上平滑的上混参数，以供上混合器基于量化上混参数输入信息使用。 参数确定器被配置为使用相变限制算法将先前平滑相位值的缩放版本与输入相位信息的缩放版本组合，以基于先前平滑相位值确定当前平滑相位值，并且 相输入信息。

公开(公告)号：US08447620B2

公开(公告)日：2013-05-21

申请号：US13081223

申请日：2011-04-06

申请人： Max Neuendorf ,  Stefan Bayer ,  Jérémie Lecomte ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Ralf Geiger ,  Markus Multrus ,  Bernhard Grill ,  Philippe Gournay ,  Redwan Salami

发明人： Max Neuendorf ,  Stefan Bayer ,  Jérémie Lecomte ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Ralf Geiger ,  Markus Multrus ,  Bernhard Grill ,  Philippe Gournay ,  Redwan Salami

IPC分类号： G10L19/008

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0212 ,  G10L19/173 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder for encoding an audio signal has a first coding branch, the first coding branch comprising a first converter for converting a signal from a time domain into a frequency domain. Furthermore, the audio encoder has a second coding branch comprising a second time/frequency converter. Additionally, a signal analyzer for analyzing the audio signal is provided. The signal analyzer, on the hand, determines whether an audio portion is effective in the encoder output signal as a first encoded signal from the first encoding branch or as a second encoded signal from a second encoding branch. On the other hand, the signal analyzer determines a time/frequency resolution to be applied by the converters when generating the encoded signals. An output interface includes, in addition to the first encoded signal and the second encoded signal, a resolution information identifying the resolution used by the first time/frequency converter and used by the second time/frequency converter.

公开(公告)号：US20120020499A1

公开(公告)日：2012-01-26

申请号：US13191236

申请日：2011-07-26

申请人： Matthias Neusinger ,  Julien Robilliard ,  Johannes Hilpert

发明人： Matthias Neusinger ,  Julien Robilliard ,  Johannes Hilpert

IPC分类号： H04B1/00

CPC分类号： G10L19/008

摘要： An upmixer for upmixing a downmix audio signal into an upmixed audio signal describing one or more upmixed audio channels includes 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.

摘要翻译： 用于将下混合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：US20110317842A1

公开(公告)日：2011-12-29

申请号：US13189621

申请日：2011-07-25

申请人： Matthias NEUSINGER ,  Julien ROBILLIARD ,  Johannes HILPERT

发明人： Matthias NEUSINGER ,  Julien ROBILLIARD ,  Johannes HILPERT

IPC分类号： H04R5/00

CPC分类号： G10L19/008

摘要： 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 includes 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 includes 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.

摘要翻译： 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中的装置包括：上混频器，其被配置为应用时间上可变的上混参数来混合下混音频信号，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在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。 相应的方法可以例如作为计算机程序来实现。