公开(公告)号：EP2489038B1

公开(公告)日：2016-01-13

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 ,  TERENTIV, Leon

IPC分类号： G10L19/008

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：EP2335428B1

公开(公告)日：2015-01-14

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 N.V. ,  Dolby International 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

公开(公告)号：EP2489037A1

公开(公告)日：2012-08-22

申请号：EP10766275.1

申请日：2010-10-15

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

发明人： FALCH, Cornelia ,  HERRE, Jürgen ,  TERENTIV, Leon

IPC分类号： G10L19/00

CPC分类号： G10L19/008

摘要： An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and a parametric side information associated with the downmix signal representation has a parameter adjuster. The parameter adjuster is configured to receive one or more parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on an average value of a plurality of parameter values, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for parameters deviating from optimal parameters by more than a predetermined deviation.

公开(公告)号：EP2137725A1

公开(公告)日：2009-12-30

申请号：EP08749081.9

申请日：2008-04-23

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

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.

公开(公告)号：EP2076900A1

公开(公告)日：2009-07-08

申请号：EP08839058.8

申请日：2008-10-17

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

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 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.

公开(公告)号：EP4462428A2

公开(公告)日：2024-11-13

申请号：EP24202070.9

申请日：2010-10-15

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

发明人： HERRE, Jürgen ,  FALCH, Cornelia ,  TERENTIV, Leon

IPC分类号： G10L19/008

摘要： An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and a parametric side information associated with the downmix signal representation comprises a parameter adjuster. The parameter adjuster is configured to receive one or more parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on an average value of a plurality of parameter values, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for parameters deviating from optimal parameters by more than a predetermined deviation.

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 ).

公开(公告)号：EP2137725B1

公开(公告)日：2014-01-08

申请号：EP08749081.9

申请日：2008-04-23

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

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： G10L19/008 ,  H04S1/00

CPC分类号： H04S1/007 ,  G10L19/008 ,  H04S2400/01

公开(公告)号：EP2491551A1

公开(公告)日：2012-08-29

申请号：EP10765803.1

申请日：2010-10-19

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

发明人： ENGDEGARD, Jonas ,  PURNHAGEN, Heiko ,  HERRE, Jürgen ,  TERENTIV, Leon ,  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, has 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.

公开(公告)号：EP2948946B1

公开(公告)日：2018-07-18

申请号：EP14700929.4

申请日：2014-01-20

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

发明人： KASTNER, Thorsten ,  HERRE, Jürgen ,  RIDDERBUSCH, Falko ,  FALCH, Cornelia

IPC分类号： G10L19/008 ,  H04S3/00

CPC分类号： G10L19/008 ,  H04S2400/11 ,  H04S2420/03

摘要： An apparatus for encoding one or more audio objects to obtain an encoded signal is provided. The apparatus comprises a downmixer (110) for downmixing the one or more audio objects to obtain one or more unprocessed downmix signals. Moreover, the apparatus comprises a processing module (120) for processing the one or more unprocessed downmix signals to obtain one or more processed downmix signals. Furthermore, the apparatus comprises a signal calculator (130) for calculating one or more additional signals, wherein the signal calculator (130) is configured to calculate each of the one or more additional signals based on a difference between one of the one or more processed downmix signals and one of the one or more unprocessed downmix signals. Moreover, the apparatus comprises an object information generator (140) for generating parametric audio object information for the one or more audio objects and additional parametric information for the additional signal. Furthermore, the apparatus comprises an output interface (150) for outputting the encoded signal, the encoded signal comprising the parametric audio object information for the one or more audio objects and the additional parametric information for the one or more additional signals. Moreover, a corresponding apparatus for decoding is provided.