公开(公告)号：EP2206113A1

公开(公告)日：2010-07-14

申请号：EP08802737.0

申请日：2008-10-01

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

发明人： UHLE, Christian ,  HELLMUTH, Oliver ,  HERRE, Jürgen ,  POPP, Harald ,  KASTNER, Thorsten

IPC分类号： G10L21/02 ,  H04S5/02

CPC分类号： H04S5/005 ,  G10L19/008 ,  G10L21/0364 ,  G10L25/78

摘要： To generate a multi-channel signal with a number of output channels that is greater than a number of input channels, a mixer is used to upmix the input signal into at least one direct channel signal and at least one surround channel signal. The device is equipped with a voice detector (18) for detecting a section of the input signal, the direct signal, or the surround channel signal, in which voice portions are present. A signal modifier (20) modifies the input signal or the surround channel signal on the basis of said detection to damp voice portions in the surround channel signal, whilst voice portions of this type are damped to a lesser degree in the direct channel signal or are not damped at all. A loudspeaker signal output system (22) projects the direct channel signals and the surround channel signals onto loudspeaker signals that are associated with a defined reproduction system, such as a 5.1 system.

公开(公告)号：EP1999997A1

公开(公告)日：2008-12-10

申请号：EP06742984.5

申请日：2006-05-18

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

发明人： DISCH, Sascha ,  LINZMEIER, Karsten ,  HERRE, Jürgen ,  POPP, Harald

IPC分类号： H04S1/00 ,  H04S3/00

CPC分类号： H04S3/002 ,  G10L19/008 ,  G10L19/26 ,  H04R2217/03 ,  H04S3/02 ,  H04S2420/03

摘要： A reconstructed output channel, reconstructed with a multi-channel reconstructor using at least one downmix channel derived by downmixing a plurality of original channels and using a parameter representation including additional information on a temporal fine structure of an original channel can be generated using a generator (32) for generating a direct signal component (42) and a diffuse signal component (44) based on the downmix channel (38) is used. Only the direct signal component (42) is modified (34) such that the temporal (40) fine structure of the reconstructed output channel is fitting a desired temporal fine structure, indicated by the additional information on the temporal fine structure transmitted.

公开(公告)号：EP1774515A1

公开(公告)日：2007-04-18

申请号：EP05740130.9

申请日：2005-05-12

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Agere System Inc.

发明人： HERRE, Jürgen ,  FALLER, Christof ,  DISCH, Sascha ,  HILPERT, Johannes

IPC分类号： G10L19/00

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

摘要： An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator for calculating a cancellation channel using information related to the original center channel available at the decoder. The device furthermore includes a combiner for combining a transmission channel with the cancellation channel. Finally, the apparatus includes a reconstructor for generating the multi-channel output signal. Due to the center channel cancellation, the channel reconstructor not only uses a different base channel for reconstructing the center channel but also uses base channels different from the transmission channels for reconstructing left and right output channels which have a reduced or even completely cancelled influence of the original center channel.

公开(公告)号：EP1495464B1

公开(公告)日：2005-09-28

申请号：EP02792858.9

申请日：2002-12-02

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： GEIGER, Ralf ,  SPORER, Thomas ,  BRANDENBURG, Karlheinz ,  HERRE, Jürgen ,  KOLLER, Jürgen ,  DEGUARA, Joachim

IPC分类号： G10L19/02

CPC分类号： G10L19/0212 ,  G10L19/0017 ,  G10L19/032

公开(公告)号：EP1407446B1

公开(公告)日：2004-11-17

申请号：EP02758344.2

申请日：2002-07-15

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： ALLAMANCHE, Eric ,  HERRE, Jürgen ,  HELLMUTH, Oliver ,  KASTNER, Thorsten

IPC分类号： G10H1/00

CPC分类号： G10H1/0008 ,  G10H2240/061 ,  G10H2240/135 ,  G10H2250/235 ,  G10H2250/601 ,  G10L15/04 ,  G10L19/0204

摘要： The invention relates to a method for characterising a signal representing an audio content. A measure is determined (12) for a tonality of the signal, whereupon a statement is made (16) about the audio content of the signal on the basis of the measure determined for the tonality of the signal. The measure for the tonality is derived from a quotient which has an average sum value in the numerator, of the spectral constituents of the signal which are exponentiated with a first power (x), and has an average sum value in the denominator, of spectral constituents which are exponientiated with a second power (y), the first and second powers differing from each other. The measure for the tonality of the signal for the content analysis is robust in relation to a signal distortion, e.g. by means of MP3-coding, and has a high correlation with the content of the signal analysed.

摘要翻译： 本发明涉及一种用于表征表示音频内容的信号的方法。 针对信号的音调确定（12）度量，随后基于针对信号的音调确定的度量来做出关于信号的音频内容的陈述（16）。 音调的度量来自一个商，该商的分子中的平均总和值，以第一幂（x）取幂的信号的频谱成分，并且具有频谱的分母的平均总和值 以第二权力（y）指数化的成分，第一和第二权力彼此不同。 用于内容分析的信号的音调的度量相对于信号失真是鲁棒的，例如， 通过MP3编码，并且与所分析的信号的内容具有高度相关性。

公开(公告)号：EP1277346B1

公开(公告)日：2003-09-17

申请号：EP01905785.0

申请日：2001-02-16

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

发明人： HERRE, Jürgen ,  DIETZ, Martin ,  SPORER, Thomas ,  SCHUG, Michael ,  SCHILDBACH, Wolfgang

IPC分类号： H04N7/26 ,  H04N7/30 ,  G10L19/14

CPC分类号： H04N19/00 ,  H04N19/126 ,  H04N19/40 ,  H04N19/60

公开(公告)号：EP0632940B1

公开(公告)日：2000-10-18

申请号：EP93905148.8

申请日：1993-02-25

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： BRANDENBURG, Karl-Heinz ,  HERRE, Jürgen ,  SEITZER, Dieter

IPC分类号： H04B1/00 ,  H03M7/40

CPC分类号： H04H20/95 ,  H03M7/42

公开(公告)号：EP0910928B1

公开(公告)日：2000-01-12

申请号：EP97927117.8

申请日：1997-06-03

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  AT & T Laboratories/Research ,  Lucent Technologies

发明人： GBUR, Uwe ,  DIETZ, Martin ,  BRANDENBURG, Karlheinz ,  GERHÄUSER, Heinz ,  HERRE, Jürgen ,  QUACKENBUSH, Schuyler

IPC分类号： H04S1/00 ,  H04S3/00 ,  H04B1/66

CPC分类号： H04B1/665 ,  G10L19/008 ,  G10L19/04 ,  H04B1/667 ,  H04B14/068 ,  H04S1/007 ,  H04S3/00

公开(公告)号：EP0772764B1

公开(公告)日：1998-01-14

申请号：EP96904042.7

申请日：1996-02-09

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： HERRE, Jürgen ,  EBERLEIN, Ernst ,  GRILL, Bernhard ,  BRANDENBURG, Karlheinz ,  GERHÄUSER, Heinz

IPC分类号： G01H3/08 ,  G10L3/00

CPC分类号： H03G5/005

公开(公告)号：EP0750811A1

公开(公告)日：1997-01-02

申请号：EP95907637.0

申请日：1995-02-02

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： HERRE, Jürgen ,  GRILL, Bernhard ,  EBERLEIN, Ernst ,  BRANDENBURG, Karlheinz ,  SEITZER, Dieter

IPC分类号： H04S5 ,  H03M7 ,  H04B14 ,  H04H20 ,  H04S3

CPC分类号： H04H20/88 ,  H04S3/02

摘要： In a process for coding a plurality of audio signals, the left and right-hand basic channels and the central channel are formed into a jointly coded signal by joint stereo coding which is decoded to provide simulated decoded signals. The simulated decoded signals and two surround channels are formed by matrixing by means of a compatibility matrix into compatible signals which are suitable for decoding using existing decoders. To prevent audible interference on account of the high energy contents of the compatible signals which would occur if joint stereo coding and decoding were first performed before matrixing, the compatible signals or the simulated decoded signals dynamically weighted by means of a dynamic correction factor in such a way that the energy of the compatible signals approaches that of signals which would be obtained by the direct matrixing of the two basic channels and the central and surround channels.