公开(公告)号：EP2491552B1

公开(公告)日：2014-12-31

申请号：EP10768018.3

申请日：2010-10-19

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

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  RETTELBACH, Nikolaus ,  MULTRUS, Markus ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian ,  WEISS, Oliver

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0208

摘要： An audio encoder uses similar principles.

公开(公告)号：EP2625688B1

公开(公告)日：2014-12-03

申请号：EP11764739.6

申请日：2011-10-04

申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. ,  VoiceAge Corporation

发明人： MULTRUS, Markus ,  GRILL, Bernhard ,  NEUENDORF, Max ,  RETTELBACH, Nikolaus ,  FUCHS, Guillaume ,  GOURNAY, Philippe ,  LEFEBVRE, Roch ,  BESSETTE, Bruno ,  WILDE, Stephan

IPC分类号： G10L21/00 ,  G10L19/12 ,  G10L19/02

CPC分类号： G10L19/12 ,  G10L19/0204 ,  G10L21/00 ,  G10L2019/0012

公开(公告)号：EP2491554B1

公开(公告)日：2014-03-05

申请号：EP10773017.8

申请日：2010-10-19

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

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  RETTELBACH, Nikolaus ,  MULTRUS, Markus ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian ,  WEISS, Oliver

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0208

摘要： An audio encoder uses similar principles.

公开(公告)号：EP2676266A1

公开(公告)日：2013-12-25

申请号：EP12705820.4

申请日：2012-02-14

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

发明人： MARKOVIC, Goran ,  FUCHS, Guillaume ,  RETTELBACH, Nikolaus ,  HELMRICH, Christian ,  SCHUBERT, Benjamin

IPC分类号： G10L19/06 ,  G10L19/14

CPC分类号： G10L19/00 ,  G10K11/16 ,  G10L19/005 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/025 ,  G10L19/03 ,  G10L19/04 ,  G10L19/107 ,  G10L19/12 ,  G10L19/22 ,  G10L19/26 ,  G10L21/0216 ,  G10L25/06 ,  G10L25/78

摘要： An encoding concept which is linear prediction based and uses spectral domain noise shaping is rendered less complex at a comparable coding efficiency in terms of, for example, rate/distortion ratio, by using the spectral decomposition of the audio input signal into a spectrogram comprising a sequence of spectra for both linear prediction coefficient computation as well as spectral domain shaping based on the linear prediction coefficients. The coding efficiency may remain even if such a lapped transform is used for the spectral decomposition which causes aliasing and necessitates time aliasing cancellation such as critically sampled lapped transforms such as an MDCT.

公开(公告)号：EP2559027A1

公开(公告)日：2013-02-20

申请号：EP11705853.7

申请日：2011-02-17

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

发明人： ROBILLIARD, Julien ,  NEUSINGER, Matthias ,  HELMRICH, Christian ,  HILPERT, Johannes ,  RETTELBACH, Nikolaus ,  DISCH, Sascha ,  EDLER, Bernd

IPC分类号： G10L19/00 ,  G10L19/06

CPC分类号： H04N19/50 ,  G10L19/008 ,  G10L19/06

摘要： An encoder/decoder is based on a combination of two audio or video channels to obtain a first combination signal as a mid-signal and a residual signal derivable using a predicted side signal derived from the mid-signal. A decoder uses the prediction residual signal, the first combination signal, a prediction direction indicator and prediction information to derive decoded first channel and second channel signals. A real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. 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： 编码器/解码器是基于两个音频或视频信道的组合，以获得第一组合信号作为中间信号和残余信号导出使用从中间信号得到的预测的侧信号。 解码器使用所述预测残差信号，第一组合信号，预测方向指示符和预测信息来导出解码的第一信道和第二信道信号。 一个真正的到假想变换可以应用用于估计所述第一组合信号的频谱的虚部。 在预测残差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复杂的假想部分，乘以 预测信息。

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.

公开(公告)号：EP2304723B1

公开(公告)日：2012-10-24

申请号：EP09776810.5

申请日：2009-06-23

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

发明人： NEUENDORF, Max ,  GRILL , Bernhard ,  KRAEMER, Ulrich ,  MULTRUS, Markus ,  POPP, Harald ,  RETTELBACH, Nikolaus ,  NAGEL , Frederik ,  LOHWASSER, Markus ,  GAYER, Marc ,  JANDER, Manuel ,  BACIGALUPO, Virgilio

IPC分类号： G10L19/14 ,  G10L21/02

CPC分类号： G10L21/038 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/20 ,  G10L21/04

公开(公告)号：EP2301024B1

公开(公告)日：2012-07-25

申请号：EP09797423.2

申请日：2009-07-06

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

发明人： GRILL, Bernhard ,  BAYER, Stefan ,  FUCHS, Guillaume ,  GEYERSBERGER, Stefan ,  GEIGER, Ralf ,  HILPERT, Johannes ,  KRAEMER, Ulrich ,  LECOMTE, Jeremie ,  MULTRUS, Markus ,  NEUENDORF, Max ,  POPP, Harald ,  RETTELBACH, Nikolaus ,  LEFEBVRE, Roch ,  BESSETTE, Bruno ,  LAPIERRE, Jimmy ,  SALAMI, Redwan ,  GOURNAY, Philippe

IPC分类号： G10L19/14

CPC分类号： G10L19/173 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/18 ,  G10L2019/0008

摘要： An apparatus for encoding comprises a first domain converter (510), a switchable bypass (50), a second domain converter (410), a first processor (420) and a second processor (520) to obtain an encoded audio signal having different signal portions represented by coded data in different domains, which have been coded by different coding algorithms. Corresponding decoding stages in the decoder together with a bypass for bypassing a domain converter allow the generation of a decoded audio signal with high quality and low bit rate.

公开(公告)号：EP2311035B1

公开(公告)日：2012-01-04

申请号：EP09793882.3

申请日：2009-07-06

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

发明人： GRILL, Bernhard ,  BAYER, Stefan ,  FUCHS, Guillaume ,  GEYERSBERGER, Stefan ,  GEIGER, Ralf ,  HILPERT, Johannes ,  KRAEMER, Ulrich ,  LECOMTE, Jeremie ,  MULTRUS, Markus ,  NEUENDORF, Max ,  POPP, Harald ,  RETTELBACH, Nikolaus ,  NAGEL, Frederik ,  DISCH, Sascha ,  HERRE, Juergen ,  YOKOTANI, Yoshikazu ,  WABNIK, Stefan ,  SCHULLER, Gerald ,  HIRSCHFELD, Jens

IPC分类号： G10L19/14

CPC分类号： G10L19/173 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder comprises a common preprocessing stage, an information sink based encoding branch such as spectral domain encoding branch, a information source based encoding branch such as an LPC-domain encoding branch and a switch for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage. An audio decoder comprises a spectral domain decoding branch, an LPC-domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.

公开(公告)号：EP2345030A2

公开(公告)日：2011-07-20

申请号：EP09736835.1

申请日：2009-10-07

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

发明人： NEUENDORF, Max ,  BAYER, Stefan ,  LECOMTE, Jérémie ,  FUCHS, Guillaume ,  ROBILLIARD, JuIien ,  RETTELBACH, Nikolaus ,  NAGEL, Frederik ,  GEIGER, RaIf ,  MULTRUS, Markus ,  GRILL, Bernhard ,  GOURNAY, Philippe ,  SALAMI, Redwan

IPC分类号： G10L19/14

CPC分类号： G10L19/24 ,  G10L19/022

摘要： An audio encoder for encoding an audio signal comprises a first coding branch (400), the first coding branch comprising a first converter (410) for converting a signal from a time domain into a frequency domain. Furthermore, the audio encoder comprises a second coding branch (500) comprising a second time/frequency converter (523). Additionally, a signal analyzer (300/525) for analyzing the audio signal is provided. The signal analyzer, on the hand, determines whether an audio portion is effective in the encoder output signal as a first encoded signal from the first encoding branch or as a second encoded signal from a second encoding branch. On the other hand, the signal analyzer determines a time/frequency resolution to be applied by the converters (410, 523) when generating the encoded signals. An output interface includes, in addition to the first encoded signal and the second encoded signal, a resolution information identifying the resolution used by the first time/frequency converter and used by the second time/frequency converter.