公开(公告)号：EP4358082A1

公开(公告)日：2024-04-24

申请号：EP24160714.2

申请日：2010-10-19

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

发明人： BESSETTE, Bruno ,  NEUENDORF, Max ,  GEIGER, Ralf ,  GOURNAY, Philippe ,  LEFEBVRE, Roch ,  GRILL, Bernhard ,  LECOMTE, Jérémie ,  BAYER, Stefan ,  RETTELBACH, Nikolaus ,  VILLEMOES, Lars ,  SALAMI, Redwan ,  DEN BRINKER, Albertus C.

IPC分类号： G10L19/18 ,  G10L19/02 ,  G10L19/04 ,  G10L19/03 ,  G10L19/12 ,  G10L19/20

CPC分类号： G10L19/0212 ,  G10L19/03 ,  G10L19/20 ,  G10L19/18 ,  G10L19/04 ,  G10L19/12

摘要： An audio signal decoder (200) for providing a decoded representation (212) of an audio content on the basis of an encoded representation (310) of the audio content comprises a transform domain path (230, 240, 242, 250, 260) configured to obtain a time-domain representation (212) of a portion of the audio content encoded in a transform-domain mode on the basis of a first set (220) of spectral coefficients, a representation (224) of an aliasing-cancellation stimulus signal and a plurality of linear-prediction-domain parameters (222). The transform domain path comprises a spectrum processor (230) configured to apply a spectrum shaping to the first set of spectral coefficients in dependence on at least a subset of the linear-prediction-domain parameters, to obtain a spectrally-shaped version (232) of the first set of spectral coefficients. The transform domain path comprises a first frequency-domain-to-time-domain converter (240) configured to obtain a time-domain representation of the audio content on the basis of the spectrally-shaped version of the first set of spectral coefficients. The transform domain path comprises an aliasing-cancellation stimulus filter configured to filter (250) the aliasing-cancellation stimulus signal (324) in dependence on at least a subset of the linear-prediction-domain parameters (222), to derive an aliasing-cancellation synthesis signal (252) from the aliasing-cancellation stimulus signal. The transform domain path also comprises a combiner (260) configured to combine the time-domain representation (242) of the audio content with the aliasing-cancellation synthesis signal (252), or a post-processed version thereof, to obtain an aliasing reduced time-domain signal.

公开(公告)号：EP2596494B1

公开(公告)日：2020-08-05

申请号：EP11738193.9

申请日：2011-07-20

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

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  HILDENBRAND, Matthias ,  WEISS, Oliver ,  TRITTHART, Arthur ,  WARMBOLD, Patrick

IPC分类号： G10L19/00 ,  G10L19/02

公开(公告)号：EP3417452A1

公开(公告)日：2018-12-26

申请号：EP17704485.6

申请日：2017-02-14

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

发明人： DICK, Sascha ,  HELMRICH, Christian ,  RETTELBACH, Nikolaus ,  SCHUH, Florian ,  FUEG, Richard ,  NAGEL, Frederik

IPC分类号： G10L19/008 ,  G10L19/028

摘要： An apparatus for decoding an encoded multichannel signal of a current frame to obtain three or more current audio output channels is provided. A multichannel processor is adapted to select two decoded channels from three or more decoded channels depending on first multichannel parameters. Moreover, the multichannel processor is adapted to generate a first group of two or more processed channels based on said selected channels. A noise filling module is adapted to identify for at least one of the selected channels, one or more frequency bands, within which all spectral lines are quantized to zero, and to generate a mixing channel using, depending on side information, a proper subset of three or more previous audio output channels that have been decoded, and to fill the spectral lines of frequency bands, within which all spectral lines are quantized to zero, with noise generated using spectral lines of the mixing channel.

公开(公告)号：EP2304719B1

公开(公告)日：2017-07-26

申请号：EP09776839.4

申请日：2009-06-25

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

发明人： RETTELBACH, Nikolaus ,  GRILL, Bernhard ,  FUCHS, Guillaume ,  GEYERSBERGER, Stefan ,  MULTRUS, Markus ,  POPP, Harald ,  HERRE, Juergen ,  WABNIK, Stefan ,  SCHULLER, Gerald ,  HIRSCHFELD, Jens

IPC分类号： G10L19/028 ,  G10L19/02 ,  G10L19/032 ,  G10L25/18

CPC分类号： G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

公开(公告)号：EP2491553B1

公开(公告)日：2016-10-12

申请号：EP10768019.1

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 ,  G10L19/008

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

摘要： An audio encoder uses similar principles.

公开(公告)号：EP2791938A2

公开(公告)日：2014-10-22

申请号：EP12809223.6

申请日：2012-12-14

申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Friedrich-Alexander-Universität Erlangen-Nürnberg

发明人： HEUBERGER, Albert ,  EDLER, Bernd ,  RETTELBACH, Nikolaus ,  GEYERSBERGER, Stefan ,  HILPERT, Johannes

IPC分类号： G10L25/69 ,  G10L19/032

CPC分类号： G10L19/008 ,  G10L19/032 ,  G10L25/69

摘要： An audio encoding apparatus includes an encoder for encoding a time segment of an input audio signal to be encoded to obtain a corresponding encoded signal segment. The audio encoding apparatus further includes a decoder for decoding the encoded signal segment to obtain a re-decoded signal segment. A clipping detector is provided for analyzing the re-decoded signal segment with respect to at least one of an actual signal clipping or an perceptible signal clipping and for generating a corresponding clipping alert. The encoder is further configured to again encode the time segment of the audio signal with at least one modified encoding parameter resulting in a reduced clipping probability in response to the clipping alert.

公开(公告)号：EP2291842B1

公开(公告)日：2014-03-12

申请号：EP09776840.2

申请日：2009-06-25

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

发明人： NAGEL , Frederik ,  DISCH, Sascha ,  NEUENDORF , Max ,  BAYER, Stefan ,  GAYER, Marc ,  LOHWASSER, Markus ,  RETTELBACH, Nikolaus ,  KRÄMER, Ulrich

IPC分类号： G10L21/038

CPC分类号： G10L21/038

公开(公告)号：EP2596494A1

公开(公告)日：2013-05-29

申请号：EP11738193.9

申请日：2011-07-20

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

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  HILDENBRAND, Matthias ,  WEISS, Oliver ,  TRITTHART, Arthur ,  WARMBOLD, Patrick

IPC分类号： G10L19/00

摘要： An audio decoder includes an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically encoded representation thereof, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code representing a spectral value, or a most significant bit-plane thereof, in a decoded form, in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. It evaluates a hash table, entries of which define both significant state values amongst the numeric context values and boundaries of intervals of numeric context values, in order to select the mapping rule, wherein the hash table ari_hash_m is defined as given in FIGS. 22(1), 22(2), 22(3) and 22(4).

公开(公告)号：EP2301028B1

公开(公告)日：2012-12-05

申请号：EP09776811.3

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： G10L21/02 ,  G10L19/02

CPC分类号： G10L21/038 ,  G10L19/0208 ,  G10L19/025 ,  G10L19/20

公开(公告)号：EP2491554A1

公开(公告)日：2012-08-29

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.