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1. 发明公开

EP2175670A1 Binaural rendering of a multi-channel audio signal 审中-公开
标题翻译： Binaurale Aufbereitung eines Mehrkanal-Audiosignals
公开(公告)号：EP2175670A1
公开(公告)日：2010-04-14
申请号：EP09006598.8
申请日：2009-05-15
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Koninklijke Philips Electronics N.V. , Dolby Sweden AB , Mundt, Harald , Terentiev, Leonid , Falch, Cornelia , Hilpert, Johannes , Hellmuth, Oliver , Plogsties, Jan , Villemoes, Lars , Breebaart, Jeroen , Koppens, Jeroen , Engdegard, Jonas
发明人： Koppens, Jeroen , Mundt, Harald , Terentiev, Leonid , Falch, Cornelia , Hilpert, Johannes , Hellmuth, Oliver , Plogsties, Jan , Villemoes, Lars , Breebaart, Jeroen , Engdegard, Jonas
IPC分类号： H04S3/00
CPC分类号： H04S3/004 , G10L19/008 , G10L19/20 , H04S1/005 , H04S2400/01 , H04S2420/01 , H04S2420/03
摘要： Binaural rendering a multi-channel audio signal into a binaural output signal (24) is described. The multi-channel audio signal comprises a stereo downmix signal (18) into which a plurality of audio signals are downmixed, and side information comprising a downmix information (DMG, DCLD) indicating, for each audio signal, to what extent the respective audio signal has been mixed into a first channel and a second channel of the stereo downmix signal (18), respectively, as well as object level information of the plurality of audio signals and inter-object cross correlation information describing similarities between pairs of audio signals of the plurality of audio signals. Based on a first rendering prescription, a preliminary binaural signal (54) is computed from the first and second channels of the stereo downmix signal (18). A decorrelated signal X d n , k is generated as an perceptual equivalent to a mono downmix (58) of the first and second channels of the stereo downmix signal (18) being, however, decorrelated to the mono downmix (58). Depending on a second rendering prescription P 2 1 , m , a corrective binaural signal (64) is computed from the decorrelated signal (62) and the preliminary binaural signal (54) is mixed with the corrective binaural signal (64) to obtain the binaural output signal (24).
摘要翻译：描述将双声道音频信号双向渲染成双耳输出信号（24）。多声道音频信号包括立体声下混合信号（18），多个音频信号被混合到其中，并且包括下混信息（DMG，DCLD）的侧信息指示对于每个音频信号，各个音频信号分别混合到立体声下混合信号（18）的第一通道和第二通道中，以及描述多个音频信号的对象级别信息和描述对象音频信号对之间的相似性的对象间互相关信息多个音频信号。基于第一渲染处方，从立体声下混合信号（18）的第一和第二声道计算初步双耳信号（54）。产生解相关信号X d n，k作为与立体声下混信号（18）的第一和第二声道的单声道下混频（58）的感知等效，然而，与单声道下混频（58）相关。根据第二渲染处方P 2 1，m，从去相关信号（62）计算校正性双耳信号（64），并将预备双耳信号（54）与校正性双耳信号（64）混合以获得双耳输出信号（24）。

2. 发明申请

WO2010128136A1 AUDIO FORMAT TRANSCODER 审中-公开
标题翻译：音频格式转换器
公开(公告)号：WO2010128136A1
公开(公告)日：2010-11-11
申请号：PCT/EP2010/056252
申请日：2010-05-07
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , THIERGART, Oliver , FALCH, Cornelia , KÜCH, Fabian , DEL GALDO, Giovanni , HERRE, Jürgen , KALLINGER, Markus
发明人： THIERGART, Oliver , FALCH, Cornelia , KÜCH, Fabian , DEL GALDO, Giovanni , HERRE, Jürgen , KALLINGER, Markus
IPC分类号： G10L19/00 , G10L21/02
CPC分类号： G10L21/0272 , G10L19/008
摘要： An audio format transcoder (100) for transcoding an input audio signal, the input audio signal having at least two directional audio components. The audio format transcoder (100) comprising a converter (110) for converting the input audio signal into a converted signal, the converted signal having a converted signal representation and a converted signal direction of arrival. The audio format transcoder (100) further comprises a position provider (120) for providing at least two spatial positions of at least two spatial audio sources and a processor (130) for processing the converted signal representation based on the at least two spatial positions to obtain at least two separated audio source measures.
摘要翻译：一种用于对输入音频信号进行代码转换的音频格式转码器（100），该输入音频信号具有至少两个方向音频分量。音频格式转码器（100）包括用于将输入音频信号转换成转换信号的转换器（110），该转换信号具有转换的信号表示和转换的信号到达方向。音频格式转码器（100）还包括用于提供至少两个空间音频源的至少两个空间位置的位置提供器（120）和用于基于至少两个空间位置处理转换后的信号表示的处理器（130）获取至少两个独立的音频源测量。

3. 发明申请

WO2009049896A9 AUDIO CODING USING UPMIX 审中-公开
公开(公告)号：WO2009049896A9
公开(公告)日：2009-04-23
申请号：PCT/EP2008/008800
申请日：2008-10-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , HELLMUTH, Oliver , HERRE, Juergen , TERENTIEV, Leonid , HOELZER, Andreas , FALCH, Cornelia , HILPERT, Johannes
发明人： HELLMUTH, Oliver , HERRE, Juergen , TERENTIEV, Leonid , HOELZER, Andreas , FALCH, Cornelia , HILPERT, Johannes
IPC分类号： G10L19/00
摘要： 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 S 1 and/or the second up-mix signal S2 from the downmix signal d according to a computation representable by (formula I) 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.

4. 发明申请

WO2008067834A1 DROPOUT CONCEALMENT FOR A MULTI-CHANNEL ARRANGEMENT 审中-公开
标题翻译：用于多通道布局的压差保护
公开(公告)号：WO2008067834A1
公开(公告)日：2008-06-12
申请号：PCT/EP2006/011759
申请日：2006-12-07
申请人： AKG ACOUSTICS GMBH , OPITZ, Martin , FALCH, Cornelia , HÖLDRICH, Robert
发明人： OPITZ, Martin , FALCH, Cornelia , HÖLDRICH, Robert
IPC分类号： H04S1/00 , G10L19/00
CPC分类号： H04S1/007 , G10L19/005
摘要： The invention relates to a method for the concealment of dropouts in one or more channels (Z) of a multi-channel arrangement comprising at least two channels (Z, S), wherein in the event of a dropout in one channel (Z) a. replacement signal is generated with the aid of at least one error-free channel (S), characterised in that, during the error-free signal transmission of the channels (Z, S) a mapping of the transmitted signals (x z , x s ) into the frequency domain is performed, the magnitude spectra (|S Z |,|S S |) being determined, spectral filter coefficients (H) are calculated that relate the magnitude spectrum (|SZ|) of a channel (Z) to the magnitude spectrum (|S S |) of at least one other channel (S), and that in the event of the dropout of a channel (Z) the replacement signal is generated by application of filter coefficients (H), computed prior to the dropout, to a substitution signal which consists of at least one error-free channel (S).
摘要翻译：本发明涉及一种用于隐藏包括至少两个通道（Z，S）的多通道布置的一个或多个通道（Z）中的脱落的方法，其中在一个通道（Z）中的脱落的情况下。借助于至少一个无错误信道（S）产生替换信号，其特征在于，在信道（Z，S）的无差错信号传输期间，传输信号（x z）的映射执行到频域中的幅度谱（| S | Z |，| S | S）计算频谱滤波器系数（H），其将信道（Z）的幅度谱（| SZ |）与至少一个其它信道的幅度谱（| S S S ||）相关联（S），并且在信道（Z）的丢失的情况下，通过将在丢失之前计算的滤波器系数（H）应用到由至少一个误差信号组成的替换信号来生成替换信号，免费频道（S）。

5. 发明申请

WO2010040456A1 BINAURAL RENDERING OF A MULTI-CHANNEL AUDIO SIGNAL 审中-公开
标题翻译：多通道音频信号的双向渲染
公开(公告)号：WO2010040456A1
公开(公告)日：2010-04-15
申请号：PCT/EP2009/006955
申请日：2009-09-25
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , KONINKLIJKE PHILIPS ELECTRONICS N.V. , DOLBY SWEDEN AB , KOPPENS, Jeroen , MUNDT, Harald , TERENTIEV, Leonid , FALCH, Cornelia , HILPERT, Johannes , HELLMUTH, Oliver , VILLEMOES, Lars , PLOGSTIES, Jan , BREEBAART, Jeroen , ENGDEGARD, Jonas
发明人： KOPPENS, Jeroen , MUNDT, Harald , TERENTIEV, Leonid , FALCH, Cornelia , HILPERT, Johannes , HELLMUTH, Oliver , VILLEMOES, Lars , PLOGSTIES, Jan , BREEBAART, Jeroen , ENGDEGARD, Jonas
IPC分类号： H04S3/00 , H04S1/00
CPC分类号： H04S3/004 , G10L19/008 , G10L19/20 , H04S1/005 , H04S2400/01 , H04S2420/01 , H04S2420/03
摘要： Binaural rendering a multi-channel audio signal into a binaural output signal (24) is described. The multi-channel audio signal comprises a stereo downmix signal (18) into which a plurality of audio signals are downmixed, and side information comprising a downmix information (DMG, DCLD) indicating, for each audio signal, to what extent the respective audio signal has been mixed into a first channel and a second channel of the stereo downmix signal (18), respectively, as well as object level information of the plurality of audio signals and inter-object cross correlation information describing similarities between pairs of audio signals of the plurality of audio signals. Based on a first rendering prescription, a preliminary binaural signal (54) is computed from the first and second channels of the stereo downmix signal (18). A decorrelated signal (X n,k d) is generated as an perceptual equivalent to a mono downmix (58) of the first and second channels of the stereo downmix signal (18) being, however, decorrelated to the mono downmix (58). Depending on a second rendering prescription (P2 1,m ), a corrective binaural signal (64) is computed from the decorrelated signal (62) and the preliminary binaural signal (54) is mixed with the corrective binaural signal (64) to obtain the binaural output signal (24).
摘要翻译：描述了将双声道音频信号呈双耳形成双耳输出信号（24）。多声道音频信号包括立体声下混合信号（18），多个音频信号被混合到其中，并且包括下混信息（DMG，DCLD）的侧信息指示对于每个音频信号，在多大程度上相应的音频信号分别混合到立体声下混合信号（18）的第一频道和第二频道中，以及多个音频信号的对象级信息和描述对象间互相关信息，描述了对多个音频信号。基于第一渲染处方，从立体声下混信号（18）的第一和第二声道计算初步双耳信号（54）。产生解相关信号（Xn，kd）作为与立体声下混信号（18）的第一和第二声道的单声道下混频（58）的感知等效，然而，与单声道下混频（58）相关。根据第二渲染处方（P21，m），从去相关信号（62）计算校正性双耳信号（64），并将预备双耳信号（54）与校正双耳信号（64）混合以获得双耳输出信号（24）。

6. 发明申请

WO2011061174A1 APPARATUS FOR PROVIDING AN UPMIX SIGNAL REPRESENTATION ON THE BASIS OF THE DOWNMIX SIGNAL REPRESENTATION, APPARATUS FOR PROVIDING A BITSTREAM REPRESENTING A MULTI-CHANNEL AUDIO SIGNAL, METHODS, COMPUTER PROGRAMS AND BITSTREAM REPRESENTING A MULTI-CHANNEL AUDIO SIGNAL USING A LINEAR COMBINATION PARAMETER 审中-公开
标题翻译：用于提供基于下行信号表示的UPMIX信号表示的装置，用于提供表示多信道音频信号的一种BITSTREAM的装置，方法，计算机程序和表示多个信道的BITSTREAM
公开(公告)号：WO2011061174A1
公开(公告)日：2011-05-26
申请号：PCT/EP2010/067550
申请日：2010-11-16
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , ENGDEGARD, Jonas , PURNHAGEN, Heiko , HERRE, Juergen , FALCH, Cornelia , HELLMUTH, Oliver , TERENTIEV, Leonid
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , HERRE, Juergen , FALCH, Cornelia , HELLMUTH, Oliver , TERENTIEV, Leonid
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： An apparatus for providing an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information, which are included in a bitstream representation of an audio content, in independence on a user-specified rendering matrix, the apparatus comprises a distortion limiter configured to obtain a modified rendering matrix using a linear combination of a user-specified rendering matrix in a target rendering matrix in dependence on a linear combination parameter. The apparatus also comprises a signal processor configured to obtain the upmix signal representation on the basis of the downmix signal representation and the object-related parametric information using the modified rendering matrix. The apparatus is also configured to evaluate a bitstream element representing the linear combination parameter in order to obtain the linear combination parameter.
摘要翻译：一种用于在用户指定的渲染矩阵上独立地基于包含在音频内容的位流表示中的下混信号表示和对象相关参数信息来提供上混合信号表示的装置，该装置包括：失真限制器被配置为根据线性组合参数在目标渲染矩阵中使用用户指定的渲染矩阵的线性组合来获得修改的渲染矩阵。该装置还包括信号处理器，该信号处理器被配置为基于下混信号表示和使用修改的渲染矩阵的对象相关参数信息获得上混信号表示。该装置还被配置为评估表示线性组合参数的比特流元件，以便获得线性组合参数。

7. 发明申请

WO2011048067A1 APPARATUS FOR PROVIDING AN UPMIX SIGNAL REPRESENTATION ON THE BASIS OF A DOWNMIX SIGNAL REPRESENTATION, APPARATUS FOR PROVIDING A BITSTREAM REPRESENTING A MULTICHANNEL AUDIO SIGNAL, METHODS, COMPUTER PROGRAM AND BITSTREAM USING A DISTORTION CONTROL SIGNALING 审中-公开
标题翻译：用于提供基于下行信号表示的UPMIX信号表示的装置，用于提供使用失真控制的多通道音频信号，方法，计算机程序和比特的表达的装置
公开(公告)号：WO2011048067A1
公开(公告)日：2011-04-28
申请号：PCT/EP2010/065671
申请日：2010-10-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E. V. , DOLBY INTERNATIONAL AB , ENGDEGARD, Jonas , PURNHAGEN, Heiko , HERRE, Juergen , TERENTIEV, Leonid , FALCH, Cornelia , HELLMUTH, Oliver
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , HERRE, Juergen , TERENTIEV, Leonid , FALCH, Cornelia , HELLMUTH, Oliver
IPC分类号： G10L19/00
CPC分类号： H04S3/008 , G10L19/008 , H04S2420/03
摘要： An apparatus for providing an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information, which are included in a bitstream representation of an audio content, and in dependence on a rendering information, comprises a distortion limiter configured to adjust upmix parameters using a distortion control scheme to avoid or limit audible distortions which are caused by an inappropriate choice of rendering parameters. The distortion limiter is configured to obtain a distortion limitation control parameter, which is included in the bitstream representation of the audio content, and to adjust a distortion control scheme in dependence on the distortion limitation control parameter.
摘要翻译：一种用于根据下混合信号表示和包含在音频内容的比特流表示中并且根据呈现信息包括的对象相关参数信息来提供上混合信号表示的装置，包括：失真限制器，被配置为使用失真控制方案调整上混参数，以避免或限制由不适当选择渲染参数引起的可听失真。失真限制器被配置为获得包括在音频内容的比特流表示中的失真限制控制参数，并且根据失真限制控制参数来调整失真控制方案。

8. 发明申请

WO2009049896A1 AUDIO CODING USING UPMIX 审中-公开
标题翻译：音频编码使用UPMIX
公开(公告)号：WO2009049896A1
公开(公告)日：2009-04-23
申请号：PCT/EP2008008800
申请日：2008-10-17
申请人： FRAUNHOFER FESELLSCHAFT ZUR FO , HELLMUTH OLIVER , HERRE JUERGEN , TERENTIEV LEONID , HOELZER ANDREAS , FALCH CORNELIA , HILPERT JOHANNES
发明人： HELLMUTH OLIVER , HERRE JUERGEN , TERENTIEV LEONID , HOELZER ANDREAS , FALCH CORNELIA , HILPERT JOHANNES
IPC分类号： G10L19/00
CPC分类号： G10L19/04 , G10L19/008 , G10L19/20 , H04S3/002 , H04S2420/03 , H04S2420/07
摘要： 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.
摘要翻译：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）可表示的计算，上变频信号S1和/或第二上混合信号S2从下混信号d产生，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。

9. 发明申请

WO2009049895A1 AUDIO CODING USING DOWNMIX 审中-公开
标题翻译：使用DOWNMIX的音频编码
公开(公告)号：WO2009049895A1
公开(公告)日：2009-04-23
申请号：PCT/EP2008/008799
申请日：2008-10-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , HELLMUTH, Oliver , HERRE, Juergen , TERENTIEV, Leonid , HOELZER, Andreas , FALCH, Cornelia , HILPERT, Johannes
发明人： HELLMUTH, Oliver , HERRE, Juergen , TERENTIEV, Leonid , HOELZER, Andreas , FALCH, Cornelia , HILPERT, Johannes
IPC分类号： G10L19/00
CPC分类号： G10L19/04 , G10L19/008 , G10L19/20 , H04S3/002 , H04S2420/03 , H04S2420/07
摘要： An Audio decoder 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 (56) and side information (58), the side information comprising level information (60) of the audio signal of the first type and the audio signal of the second type in a first predetermined time/frequency resolution (42), and a residual signal (62) specifying residual level values in a second predetermined time/frequency resolution, the audio decoder comprising means (52) for computing prediction coefficients (64) based on the level information (60); and means (54) for up-mixing the downmix signal (56) based on the prediction coefficients (64) and the residual signal (62) 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.
摘要翻译：描述了用于解码具有第一类型的音频信号的多音频对象信号和其中编码的第二类型的音频信号的音频解码器，由下混合信号（56）和侧面组成的多音频对象信号信息（58），包括第一类型的音频信号的电平信息（60）和第一预定时间/频率分辨率（42）中的第二类型的音频信号的辅助信息，以及指定所述音频解码器包括用于基于所述电平信息（60）计算预测系数（64）的装置（52）;以及第二预定时间/频率分辨率的剩余电平值。以及用于基于所述预测系数（64）和所述残差信号（62）对所述降混信号（56）进行混合的装置（54），以获得接近所述第一类型的音频信号的第一上混合音频信号和/或接近第二类型的音频信号的第二上混合音频信号。

10. 发明申请

WO2008131903A1 APPARATUS AND METHOD FOR SYNTHESIZING AN OUTPUT SIGNAL 审中-公开
标题翻译：用于合成输出信号的装置和方法
公开(公告)号：WO2008131903A1
公开(公告)日：2008-11-06
申请号：PCT/EP2008/003282
申请日：2008-04-23
申请人： DOLBY SWEDEN AB , FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , ENGDEGARD, Jonas , VILLEMORS, Lars , PURNHAGEN, Heiko , RESCH, Barbara , FALCH, Cornelia , HERRE, Juergen , HILPERT, Johannes , HOELZER, Andreas , TERENTIEV, Leonid
发明人： ENGDEGARD, Jonas , VILLEMORS, Lars , PURNHAGEN, Heiko , RESCH, Barbara , FALCH, Cornelia , HERRE, Juergen , HILPERT, Johannes , HOELZER, Andreas , TERENTIEV, Leonid
IPC分类号： G10L19/00 , H04S3/02
CPC分类号： H04S1/007 , G10L19/008 , H04S2400/01
摘要： An apparatus for synthesizing a rendered output signal having a first audio channel and a second audio channel includes a decorrelator stage (356) for generating a decorrelator signal based on a downmix signal, and a combiner (364) for performing a weighted combination of the downmix signal and a decorrelated signal based on parametric audio object information (362), downmix information (354) and target rendering information (360). The combiner solves the problem of optimally combining matrixing with decorrelation for a high quality stereo scene reproduction of a number of individual audio objects using a multichannel downmix.
摘要翻译：一种用于合成具有第一音频频道和第二音频频道的渲染输出信号的装置，包括用于基于降混信号产生去相关器信号的去相关器级（356）和用于执行下混合的加权组合的组合器（364）信号和基于参数音频对象信息（362），下混信息（354）和目标渲染信息（360）的去相关信号。组合器解决了使用多通道下混合将矩阵化与去相关最佳组合以用于多个单独音频对象的高质量立体场景再现的问题。

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