公开(公告)号：EP4404559A2

公开(公告)日：2024-07-24

申请号：EP24167074.4

申请日：2011-02-17

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Julien, Robilliard ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： H04N19/154

CPC分类号： G10L19/008 ,  G10L19/06 ,  H04N19/50 ,  H04N19/105 ,  H04N19/156 ,  H04N19/154 ,  H04N19/146 ,  H04N19/70

摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video 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) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator 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：EP4235662A2

公开(公告)日：2023-08-30

申请号：EP23180164.8

申请日：2018-01-10

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Neuendorf, Max ,  Felix, Matthias ,  Hildenbrand, Matthias ,  Schuster, Lukas ,  Hofmann, Ingo ,  Herrmann, Bernd ,  Rettelbach, Nikolaus

IPC分类号： G10L19/22

摘要： An audio decoder for providing a decoded audio signal representation on the basis of an encoded audio signal representation is configured to adjust decoding parameters in dependence on a configuration information and is also configured to decode one or more audio frames using a current configuration information. The audio decoder is configured to compare a configuration information in a configuration structure associated with one or more frames to be decoded by the current configuration information, and to make a transition to perform a decoding using the configuration information in the configuration structure associated with the one or more frames to be decoded as a new configuration information if the configuration information in the configuration structure associated with the one or more frames to be decoded, or a relevant portion of the configuration information in the configuration structure associated with the one or more frames to be decoded, is different from the current configuration information. The audio decoder is configured to consider a stream identifier information included in the configuration structure when comparing the configuration information, such that a difference between a stream identifier previously acquired by the audio decoder and a stream identifier represented by the stream identifier information in the configuration structure associated with the one or more frames to be decoded causes to make the transition.

公开(公告)号：EP3779981A1

公开(公告)日：2021-02-17

申请号：EP20199067.8

申请日：2011-02-17

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Robilliard, Julien ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/06 ,  G10L19/008 ,  H04N19/50 ,  H04N19/105 ,  H04N19/146 ,  H04N19/154 ,  H04N19/156 ,  H04N19/70

摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video 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) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator 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：EP2947657A1

公开(公告)日：2015-11-25

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 ,  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。

公开(公告)号：EP2947654A1

公开(公告)日：2015-11-25

申请号：EP15176781.1

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 ,  G10L19/022

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。

公开(公告)号：EP2352147B1

公开(公告)日：2013-09-04

申请号：EP11162255.1

申请日：2009-06-23

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Neuendorf, Max ,  Krämer, Ulrich ,  Grill, Bernhard ,  Multrus, Markus ,  Popp, Harald ,  Rettelbach, Nikolaus ,  Nagel, Frederik ,  Lohwasser, Markus ,  Gayer, Marc ,  Jander, Manuel ,  Bacigalupo, Virgilio

IPC分类号： G10L19/20 ,  G10L21/038 ,  G10L21/02 ,  G10L19/008

CPC分类号： G10L21/038 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/20 ,  G10L21/04

公开(公告)号：EP2346030A1

公开(公告)日：2011-07-20

申请号：EP11157204.6

申请日：2009-06-25

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Rettelbach, Nikolaus ,  Grill, Bernhard ,  Fuchs, Guillaume ,  Geyersberger, Stefan ,  Multrus, Markus ,  Popp, Harald ,  Herre, Jürgen ,  Wabnik, Stefan ,  Schuller, Gerald ,  Hirschfeld, Jens

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/0017 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/022 ,  G10L19/028 ,  G10L19/035 ,  G10L25/18

摘要： An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal comprises a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also comprises an audio stream provider configured to provide the audio stream such that the audio stream comprises an information describing an audio content of the frequency bands and an information describing the multi-band quantization error.
A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal comprises a noise filler configured to introduce noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.

摘要翻译： 一种用于基于输入音频信号的变换域表示来提供音频流的编码器包括：量化误差计算器，被配置为确定输入音频信号的多个频带上的多频带量化误差， 获取信息可用。 编码器还包括被配置为提供音频流的音频流提供器，使得音频流包括描述频带的音频内容的信息和描述多频带量化误差的信息。 用于基于表示音频信号的频带的频带的频谱分量的编码音频流提供音频信号的解码表示的解码器包括：噪声填充器，被配置为将噪声引入多个频带的频谱分量中， 基于公共多频带噪声强度值来关联频带增益信息。

公开(公告)号：EP2214164A2

公开(公告)日：2010-08-04

申请号：EP10152001.3

申请日：2010-01-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

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

IPC分类号： G10L19/02 ,  G10L19/14

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经编码的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以及被配置为基于一组频域参数提供音频帧的时域表示的频域解码器核心，考虑到从 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：EP4404560A3

公开(公告)日：2024-08-21

申请号：EP24167075.1

申请日：2011-02-17

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Julien, Robilliard ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/06 ,  G10L19/008 ,  H04N19/50 ,  H04N19/105 ,  H04N19/146 ,  H04N19/154 ,  H04N19/156 ,  H04N19/70

CPC分类号： G10L19/008 ,  G10L19/06 ,  H04N19/50 ,  H04N19/105 ,  H04N19/156 ,  H04N19/154 ,  H04N19/146 ,  H04N19/70

摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video 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) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator 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：EP4254951A3

公开(公告)日：2023-11-29

申请号：EP23187327.4

申请日：2011-02-17

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Robilliard, Julien ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/008 ,  G10L19/00 ,  G10L19/06 ,  H04N19/105 ,  H04N19/156 ,  H04N19/70 ,  H04N19/146 ,  H04N19/154

摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video 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) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator 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.