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1. 发明公开

EP2375409A1 Audio encoder, audio decoder and related methods for processing multi-channel audio signals using complex prediction 审中-公开
标题翻译：音频编码器，音频解码器和用于使用复杂的预测处理多通道音频信号相关联的方法
公开(公告)号：EP2375409A1
公开(公告)日：2011-10-12
申请号：EP10169432.1
申请日：2010-07-13
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Dolby International AB
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
IPC分类号： G10L19/00 , 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.
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。

2. 发明授权

EP2543038B1 Decoding of multi-channel audio signals using complex prediction 有权转让
标题翻译：使用复杂的预测的多通道音频信号的解码
公开(公告)号：EP2543038B1
公开(公告)日：2015-08-26
申请号：EP11709735.2
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 , ROBILLARD, 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.

3. 发明公开

EP2543038A1 AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION 有权转让
标题翻译：使用复杂的预测的多通道音频信号的解码
公开(公告)号：EP2543038A1
公开(公告)日：2013-01-09
申请号：EP11709735.2
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 , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
IPC分类号： G10L19/00 , 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.

4. 发明申请

WO2010086342A1 AUDIO ENCODER, AUDIO DECODER, METHOD FOR ENCODING AN INPUT AUDIO INFORMATION, METHOD FOR DECODING AN INPUT AUDIO INFORMATION AND COMPUTER PROGRAM USING IMPROVED CODING TABLES 审中-公开
标题翻译：音频编码器，音频解码器，编码输入音频信息的方法，使用改进的编码表解码输入音频信息和计算机程序的方法
公开(公告)号：WO2010086342A1
公开(公告)日：2010-08-05
申请号：PCT/EP2010/050954
申请日：2010-01-27
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , LECOMTE, Jeremie , NAGEL, Frederik , ROBILLARD, Julien , GEIGER, Ralf , BORSUM, Arne , FUCHS, Guillaume , MULTRUS, Markus
发明人： LECOMTE, Jeremie , NAGEL, Frederik , ROBILLARD, Julien , GEIGER, Ralf , BORSUM, Arne , FUCHS, Guillaume , MULTRUS, Markus
IPC分类号： G10L19/00
CPC分类号： G10L19/0017
摘要： An audio decoder comprises an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically-encoded representation of the spectral values and a frequency-domain to time-domain converter for providing a time-domain audio representation using the decoded spectral values, in order to obtain a decoded audio information. The arithmetic decoder is configured to derive a group index from a variable-length-codeword representing the group index in dependence on a state index. The arithmetic decoder is configured to derive the values of a most-significant bit-plane of a tuple of spectral values using the group index and an element index, and to provide a tuple of decoded spectral values using the values of the most-significant bit-plane of the tuple of spectral values. The arithmetic decoder is configured to select a cumulative-frequencies-table out of a set of 32 cumulative-frequencies-tables in dependence on the state index, and to apply the selected cumulative-frequencies-table to derive the group index from the variable-length codeword representing the group index.
摘要翻译：音频解码器包括算术解码器，用于基于频谱值的算术编码表示来提供多个解码频谱值，以及频域到时域转换器，用于使用解码频谱提供时域音频表示值，以便获得解码的音频信息。算术解码器被配置为根据状态索引从表示组索引的可变长度码字导出组索引。算术解码器被配置为使用组索引和元素索引来导出频谱值的元组的最高有效位平面的值，并且使用最高有效位的值来提供解码频谱值的元组光谱值的元组的平面。算术解码器被配置为根据状态索引从32个累积频率表的集合中选择累积频率表，并且应用所选择的累积频率表以从可变频率表中导出组索引，代表组索引的长度代码字。

5. 发明申请

WO2011124473A1 AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION 审中-公开
标题翻译：音频编码器，音频解码器和使用复杂预测处理多通道音频信号的相关方法
公开(公告)号：WO2011124473A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/054485
申请日：2011-03-23
申请人： FRAUNHOFER-GESELLSCHAFT DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
IPC分类号： G10L19/00 , 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.
摘要翻译：音频编码器和音频解码器基于两个音频通道（201,202）的组合，以获得作为中间信号的第一组合信号（204）和可以使用预测侧信号导出的残留信号（205）从中间信号导出。基于优化目标（208），将第一组合信号和预测残差信号与由优化器（207）导出的预测信息（206）一起编码（209）并写入（212）到数据流（213）中。解码器使用预测残差信号，第一组合信号和预测信息来导出解码的第一信道信号和解码的第二信道信号。在编码器示例或解码器示例中，可以应用实 - 虚变换来估计第一组合信号的频谱的虚部。为了计算在推导预测残差信号中使用的预测信号，将实值第一组合信号乘以复数预测信息的实部，并将第一组合信号的估计虚部乘以假想部分复杂的预测信息。

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