公开(公告)号：EP1754222B1

公开(公告)日：2007-11-14

申请号：EP06724214.9

申请日：2006-04-10

申请人： Coding Technologies AB ,  Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Koninklijke Philips Electronics N.V.

发明人： ROEDEN, Jonas ,  ENGDEGARD, Jonas ,  PURNHAGEN, Heiko ,  BREEBAART,Jeroen ,  SCHUIJERS, Erik ,  VAN DE PAR, Steven ,  HILPERT, Johannes ,  HERRE, Jürgen

IPC分类号： G10L19/00

CPC分类号： G10L19/03 ,  G10L19/008

摘要： Parameters being a measure for a characteristic of a channel or of a pair of channels, wherein the parameter is a measure for a characteristic of the channel or of the pair of channels with respect to another channel of a multi-channel signal can be quantized more efficiently using a quantization rule that is generated based on a relation of an energy measure of the channel or the pair of channels and an energy measure of the multi-channel signal. With generation of the quantization rule taking into account a psycho acoustic approach, the size of an encoded representation of the multi-channel signal can be decreased by coarser quantization without significantly disturbing the perceptual quality of the multi-channel signal when reconstructed from the encoded representation.

公开(公告)号：EP1738356A1

公开(公告)日：2007-01-03

申请号：EP06706309.9

申请日：2006-01-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Coding Technologies AB ,  Koninklijke Philips Electronics N.V.

发明人： NEUSINGER, Matthias ,  HERRE, Juergen ,  DISCH, Sascha ,  PURNHAGEN, Heiko ,  KJOERLING, Kristofer ,  ENGDEGARD, Jonas ,  BREEBAART, J., Koninklijke Philips Electronic N.V. ,  SCHUIJERS, E., Koninklijke Philips Electronic N.V. ,  OOMEN, W., Koninklijke Philips Electronic N.V.

IPC分类号： G10L19/14 ,  H04S5/00

CPC分类号： G10L19/26 ,  G10L19/008 ,  G10L2019/0012 ,  H04S3/008

摘要： On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.

公开(公告)号：EP2082397B1

公开(公告)日：2011-12-28

申请号：EP07818758.0

申请日：2007-10-05

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB ,  Koninklijke Philips Electronics N.V.

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

IPC分类号： G10L19/14 ,  G10L19/00

CPC分类号： G10L19/173 ,  G10L19/008 ,  H04S2420/03

摘要： 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：EP2082397A2

公开(公告)日：2009-07-29

申请号：EP07818758.0

申请日：2007-10-05

申请人： Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. ,  Dolby Sweden AB ,  Koninklijke Philips Electronics N.V.

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

IPC分类号： G10L19/14

CPC分类号： G10L19/173 ,  G10L19/008 ,  H04S2420/03

摘要： 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：EP1869667A1

公开(公告)日：2007-12-26

申请号：EP06706552.4

申请日：2006-02-01

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Coding Technologies Sweden AB ,  Koninklijke Philips Electronics N.V.

发明人： HOELZER, Andreas ,  HERRE, Juergen ,  ROEDEN, Jonas ,  PURNHAGEN, Heiko ,  KJOERLING, Kristofer ,  ENGDEGARD, Jonas ,  BREEBAART, Jeroen, Koninklijke Philips Elec. N.V. ,  SCHUIJERS, Erik, Koninklijke Philips Elec. N.V. ,  OOMEN, Werner, Koninklijke Philips Elec. N.V. ,  VILLEMOES, Lars

IPC分类号： G10L19/00 ,  H04S3/00

CPC分类号： G10L19/008 ,  H04S3/00 ,  H04S2420/03

摘要： A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.

公开(公告)号：EP1738356B1

公开(公告)日：2012-11-28

申请号：EP06706309.9

申请日：2006-01-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB ,  Koninklijke Philips Electronics N.V.

发明人： NEUSINGER, Matthias ,  HERRE, Juergen ,  DISCH, Sascha ,  PURNHAGEN, Heiko ,  KJOERLING, Kristofer ,  ENGDEGARD, Jonas ,  BREEBAART, J., Koninklijke Philips Electronic N.V. ,  SCHUIJERS, E., Koninklijke Philips Electronic N.V. ,  OOMEN, W., Koninklijke Philips Electronic N.V.

IPC分类号： G10L19/14 ,  H04S5/00

CPC分类号： G10L19/26 ,  G10L19/008 ,  G10L2019/0012 ,  H04S3/008

摘要： On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.

公开(公告)号：EP2335428A1

公开(公告)日：2011-06-22

申请号：EP09778738.6

申请日：2009-09-25

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Koninklijke Philips Electronics N.V. ,  Dolby Sweden AB

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).

公开(公告)号：EP2489038A1

公开(公告)日：2012-08-22

申请号：EP10779542.9

申请日：2010-11-16

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： ENGDEGARD, Jonas ,  PURNHAGEN, Heiko ,  HERRE, Juergen ,  FALCH, Cornelia ,  HELLMUTH, Oliver ,  TERENTIEV, Leon

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 has 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 has 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.

公开(公告)号：EP2483887B1

公开(公告)日：2017-07-26

申请号：EP10757435.2

申请日：2010-09-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： HERRE, Jürgen ,  HILPERT, Johannes ,  HÖLZER, Andreas ,  ENGDEGARD, Jonas ,  PURNHAGEN, Heiko

IPC分类号： G10L19/20 ,  H04S3/02 ,  H04S5/00

CPC分类号： G10L19/008 ,  G10L19/005 ,  G10L19/20 ,  H04S3/02 ,  H04S5/005 ,  H04S2420/03

摘要： An audio signal decoder for providing an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information and in dependence on a rendering information comprises an object parameter determinator. The object parameter determinator is configured to obtain inter-object-correlation values for a plurality of pairs of audio objects. The object parameter determinator is configured to evaluate a bitstream signaling parameter in order to decide whether to evaluate individual inter-object-correlation bitstream parameter values to obtain inter-object-correlation values for a plurality of pairs of related audio objects, or to obtain inter-object-correlation values for a plurality of pairs of related audio objects using a common inter-object-correlation bitstream parameter value. The audio signal decoder also comprises a signal processor configured to obtain the upmix signal representation on the basis of the downmix signal representation and using the inter-object-correlation values for a plurality of pairs of related objects and the rendering information.

摘要翻译： 用于基于下混合信号表示和对象相关参数信息以及取决于呈现信息来提供上混信号表示的音频信号解码器包括对象参数确定器。 对象参数确定器被配置为获得多对音频对象的对象间相关值。 对象参数确定器被配置为评估比特流信令参数，以便决定是否评估各个对象间相关比特流参数值以获得多对相关音频对象的对象间相关值，或者获得帧间 使用公共对象间相关比特流参数值来确定多个相关音频对象对的对象相关值。 音频信号解码器还包括信号处理器，该信号处理器被配置为基于下混合信号表示并且针对多对相关对象和渲染信息使用对象间相关值来获得上混信号表示。

公开(公告)号：EP2425427B1

公开(公告)日：2014-09-10

申请号：EP10716830.4

申请日：2010-04-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： HERRE, Jürgen ,  HOELZER, Andreas ,  TERENTIEV, Leonid ,  KASTNER, Thorsten ,  FALCH, Cornelia ,  PURNHAGEN, Heiko ,  ENGDEGARD, Jonas ,  RIDDERBUSCH, Falco

IPC分类号： G10L19/008 ,  G10L19/20

CPC分类号： G10L19/008 ,  G10L19/20

摘要： An audio signal encoder (600) for providing a downmix signal representation (614) and an object-related parametric information (616) on the basis of a plurality of object signals (x 1 to x N ) comprises a downmixer (620) configured to provide one or more downmix signals in dependence on downmix coefficients (d 1 to d N ) associated with the object signals (x 1 to x N ), such that the one or more downmix signals comprise a superposition of a plurality of object signals, and a side information provider (630) configured to provide an inter-object-relationship side information (OLD, IOC) describing level differences and correlation characteristics of object signals (x 1 to x N ) and an individual-object side information describing one or more individual properties of the individual object signals (x 1 to x N ).