公开(公告)号：EP4307126A2

公开(公告)日：2024-01-17

申请号：EP23214134.1

申请日：2006-06-21

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

发明人： HILPERT, Johannes ,  FALLER, Christof ,  LINZMEIER, Karsten ,  SPERSCHNEIDER, Ralph

IPC分类号： G06F12/0815

摘要： The purpose of the invention is to bridge the gap between parametric multi-channel audio coding and matrixed-surround multi-channel coding by gradually improving the sound of an up-mix signal while raising the bit-rate consumed by the side-information starting from 0 up to the bit-rates of the parametric methods. More specifically, it provides a method of flexibly choosing an "operating point" somewhere between matrixed-surround (no side-information, limited audio quality) and fully parametric reconstruction (full side-information rate required, good quality). This operating point can be chosen dynamically (i.e. varying over time) and in response to the permissible side-information rate, as it is dictated by the individual application.

公开(公告)号：EP4307125A2

公开(公告)日：2024-01-17

申请号：EP23214133.3

申请日：2006-06-21

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

发明人： HILPERT, Johannes ,  FALLER, Christof ,  LINZMEIER, Karsten ,  SPERSCHNEIDER, Ralph

IPC分类号： G06F12/0815

摘要： The purpose of the invention is to bridge the gap between parametric multi-channel audio coding and matrixed-surround multi-channel coding by gradually improving the sound of an up-mix signal while raising the bit-rate consumed by the side-information starting from 0 up to the bit-rates of the parametric methods. More specifically, it provides a method of flexibly choosing an "operating point" somewhere between matrixed-surround (no side-information, limited audio quality) and fully parametric reconstruction (full side-information rate required, good quality). This operating point can be chosen dynamically (i.e. varying over time) and in response to the permissible side-information rate, as it is dictated by the individual application.

公开(公告)号：EP1869774B1

公开(公告)日：2019-06-05

申请号：EP06723036.7

申请日：2006-02-13

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

发明人： SPERSCHNEIDER, Ralph ,  HERRE, Jürgen ,  LINZMEIER, Karsten ,  HILPERT, Johannes

IPC分类号： H03M7/40 ,  H04N19/15 ,  H04N19/12 ,  H04N19/463 ,  G10L19/008 ,  H04N19/196

公开(公告)号：EP3483878A1

公开(公告)日：2019-05-15

申请号：EP17201142.1

申请日：2017-11-10

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

发明人： TOMASEK, Adrian ,  RAVELLI, Emmanuel ,  SCHNELL, Markus ,  TSCHEKALINSKIJ, Alexander ,  SCHNABEL, Michael ,  SPERSCHNEIDER, Ralph

IPC分类号： G10L19/005

摘要： An assignment of one of phase set of different loss concealment tools of an audio decoder to a portion of the audio signal to be decoded from a data stream, which portion is affected by loss, that is the selection out of the set of different loss concealment tools, may be made in a manner leading to a more pleasant loss concealment if the assignment/selection is done based on two measures: A first measure which is determined measures a spectral position of a spectral centroid of a spectrum of the audio signal and a second measure which is determined measures a temporal predictability of the audio signal. The assigned or selected loss concealment tool may then be used to recover the portion of the audio signal.

公开(公告)号：EP2661745A1

公开(公告)日：2013-11-13

申请号：EP12705999.6

申请日：2012-02-13

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Technische Universität Ilmenau

发明人： LECOMTE, Jérémie ,  DIETZ, Martin ,  SCHNABEL, Michael ,  SPERSCHNEIDER, Ralph

IPC分类号： G10L19/00 ,  G10L19/06

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 apparatus (100) for generating spectral replacement values for an audio signal is provided. The apparatus (100) comprises a buffer unit (110) for storing previous spectral values relating to a previously received error-free audio frame. Moreover, the apparatus (100) comprises a concealment frame generator (120) for generating the spectral replacement values, when a current audio frame has not been received or is erroneous. The previously received error-free audio frame comprises filter information, the filter information having associated a filter stability value indicating a stability of a prediction filter. The concealment frame generator (120) is adapted to generate the spectral replacement values based on the previous spectral values and based on the filter stability value.

公开(公告)号：EP1495548B1

公开(公告)日：2006-02-22

申请号：EP03747407.9

申请日：2003-04-07

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

发明人： HOMM, Daniel ,  SPERSCHNEIDER, Ralph

IPC分类号： H03M13/03 ,  H03M13/41 ,  G10L19/00 ,  G06F17/00 ,  G06T9/00

CPC分类号： G10L19/005 ,  H03M13/03 ,  H03M13/41 ,  H03M13/6516 ,  H04N19/60 ,  H04N19/69 ,  H04N19/895 ,  H04N19/91

摘要： A device for masking a fault in a faulty or potentially faulty information unit generates output values of a forward decoder (14) and of a backward decoder (16), which differ from one another thereby indicating (18) a fault masking area. The different values for one and the same information unit are checked with regard to a predetermined criterion in order to select (22) the value that fulfills, i.e. is plausible for, the predetermined criterion. This enables, without impairing a compression rate, an elimination or reduction of the continuation faults introduced during a decoding of blocks comprised of reversible code words of a variable length.

公开(公告)号：EP1327243B1

公开(公告)日：2004-02-11

申请号：EP02702266.4

申请日：2002-01-14

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

发明人： SPERSCHNEIDER, Ralph ,  TEICHMANN, Bodo ,  LUTZKY, Manfred ,  Grill, Bernhard

IPC分类号： G10L19/14 ,  H04L29/06 ,  H04L29/08

CPC分类号： G10L19/24 ,  H04L29/06027

公开(公告)号：EP3011560B1

公开(公告)日：2018-08-01

申请号：EP14733125.0

申请日：2014-06-18

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

发明人： LECOMTE, Jérémie ,  BAUER, Fabian ,  SPERSCHNEIDER, Ralph ,  TRITTHART, Arthur

IPC分类号： G10L19/005 ,  G10L21/038 ,  G10L19/24

CPC分类号： G10L19/005 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/083 ,  G10L19/24 ,  G10L21/038

摘要： An audio decoder configured to produce an audio signal from a bitstream containing audio frames includes: a core band decoding module configured to derive a directly decoded core band audio signal from the bitstream; a bandwidth extension module configured to derive a parametrically de-coded bandwidth extension audio signal from the core band audio signal and from the bitstream, wherein the bandwidth extension audio signal is based on a frequency domain signal having at least one frequency band; and a combiner configured to combine the core band audio signal and the bandwidth extension audio signal so as to produce the audio signal; wherein the bandwidth extension module includes an energy adjusting module being configured in such way that in a current audio frame in which an audio frame loss occurs, an adjusted signal energy for the cur-rent audio frame for the at least one frequency band is set.

公开(公告)号：EP3011563A1

公开(公告)日：2016-04-27

申请号：EP14732196.2

申请日：2014-06-23

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

发明人： SCHNABEL, Michael ,  MARKOVIC, Goran ,  SPERSCHNEIDER, Ralph ,  LECOMTE, Jérémie ,  HELMRICH, Christian

IPC分类号： G10L19/09 ,  G10L19/005 ,  G10L25/90

摘要： An apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal includes a receiving interface for receiving one or more frames comprising information on a plurality of audio signal samples of an audio signal spectrum of the encoded audio signal, and a processor for generating the reconstructed audio signal. The processor is configured to generate the reconstructed audio signal by fading a modified spectrum to a target spectrum, if a current frame is not received by the receiving interface or if the current frame is received by the receiving interface but is corrupted, wherein the modified spectrum includes a plurality of modified signal samples, wherein, for each of the modified signal samples of the modified spectrum, an absolute value of the modified signal sample is equal to an absolute value of one of the audio signal samples of the audio signal spectrum.

摘要翻译： 提供一种用于解码编码音频信号以获得重构音频信号的装置，具有：用于接收一个或多个帧的接收接口，系数发生器和信号重建器。 系数发生器被配置为确定一个或多个第一音频信号系数和一个或多个噪声系数。 此外，系数发生器被配置为根据一个或多个第一音频信号系数并依赖于一个或多个噪声系数来产生一个或多个第二音频信号系数。 音频信号重建器被配置为根据一个或多个第一音频信号系数来重构重构音频信号的第一部分，并且音频信号重建器被配置为根据一个或多个第二音频信号重建重构音频信号的第二部分 音频信号系数，如果当前帧未被接收接口接收，或者接收接口接收的当前帧是否损坏。

公开(公告)号：EP3011561A1

公开(公告)日：2016-04-27

申请号：EP14739070.2

申请日：2014-06-23

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

发明人： SCHNABEL, Michael ,  MARKOVIC, Goran ,  SPERSCHNEIDER, Ralph ,  LECOMTE, Jérémie ,  HELMRICH, Christian

IPC分类号： G10L19/005 ,  G10L19/09 ,  G10L25/90

CPC分类号： G10L19/005 ,  G10L19/002 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/07 ,  G10L19/083 ,  G10L19/09 ,  G10L19/12 ,  G10L19/22 ,  G10L2019/0002 ,  G10L2019/0011 ,  G10L2019/0016

摘要： An apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal is provided, having: a receiving interface for receiving one or more frames, a coefficient generator, and a signal reconstructor. The coefficient generator is configured to determine one or more first audio signal coefficients, and one or more noise coefficients. Moreover, the coefficient generator is configured to generate one or more second audio signal coefficients, depending on the one or more first audio signal coefficients and depending on the one or more noise coefficients. The audio signal reconstructor is configured to reconstruct a first portion of the reconstructed audio signal depending on the one or more first audio signal coefficients and the audio signal reconstructor is configured to reconstruct a second portion of the reconstructed audio signal depending on the one or more second audio signal coefficients, if the current frame is not received by the receiving interface or if the current frame being received by the receiving interface is corrupted.

摘要翻译： 用于编码音频信号的解码以获得重建的音频信号的装置被提供，其具有：接收接口，用于接收一个或多个帧，一个系数发生器，以及信号重构器。 系数生成器被配置为确定矿的一个或多个第一音频信号的系数，并且一个或多个噪声系数。 更上方，系数发生器被配置为生成一个或多个第二音频信号的系数，这取决于一个或多个第一音频信号和系数根据所述一个或多个噪声系数。 的音频信号重建器被配置为重建取决于一个或多个第一音频信号系数和音频信号重构器重构的音频信号的第一部分被配置以重构重构的音频信号的第二部分取决于一个或多个第二 系数的音频信号，如果当前帧不是由接收接口接收，或者如果由所述接收接口正在接收的当前帧恶化。