公开(公告)号：EP3975176A3

公开(公告)日：2022-07-27

申请号：EP21208008.9

申请日：2018-10-01

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

发明人： FUCHS, Guillaume ,  HERRE, Jürgen ,  KÜCH, Fabian ,  DÖHLA, Stefan ,  MULTRUS, Markus ,  THIERGART, Oliver ,  WÜBBOLT, Oliver ,  GHIDO, Florin ,  BAYER, Stefan ,  JAEGERS, Wolfgang

IPC分类号： G10L19/008 ,  G10L19/16

摘要： An audio data converter comprises: an input interface (100) for receiving an object description of an audio object having audio object metadata; a metadata converter (150, 125, 126, 148) for converting the audio object metadata into DirAC metadata; and an output interface (300) for transmitting or storing the DirAC metadata.

公开(公告)号：EP3025338B1

公开(公告)日：2018-03-07

申请号：EP14738866.4

申请日：2014-07-15

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

发明人： GHIDO, Florin ,  NIEDERMEIER, Andreas

IPC分类号： G10L19/02 ,  G10L19/032 ,  G10L21/038 ,  G10L19/038

CPC分类号： G10L19/06 ,  G10L19/0019 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/032 ,  G10L19/038 ,  G10L21/038

摘要： An improved concept for coding sample values of a spectral envelope is obtained by combining spectrotemporal prediction on the one hand and context-based entropy coding the residuals, on the other hand, while particularly determining the context for a current sample value dependent on a measure of a deviation between a pair of already coded/decoded sample values of the spectral envelope in a spectrotemporal neighborhood of the current sample value. The combination of the spectrotemporal prediction on the one hand and the context-based entropy coding of the prediction residuals with selecting the context depending on the deviation measure on the other hand harmonizes with the nature of spectral envelopes.

公开(公告)号：EP4348638A1

公开(公告)日：2024-04-10

申请号：EP22735305.9

申请日：2022-05-25

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

发明人： HERRE, Jürgen ,  GHIDO, Florin

IPC分类号： G10L19/008

公开(公告)号：EP4246512A2

公开(公告)日：2023-09-20

申请号：EP23188679.7

申请日：2014-07-15

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

发明人： NIEDERMEIER, Andreas ,  ERTEL, Christian ,  GEIGER, Ralf ,  GHIDO, Florin ,  HELMRICH, Christian

IPC分类号： G10L19/02

摘要： An apparatus for decoding an encoded audio signal comprising an encoded representation of a first set of first spectral portions and an encoded representation of parametric data indicating spectral energies for a second set of second spectral portions, comprises: an audio decoder (900) for decoding the encoded representation (901b) of the first set of the first spectral portions to obtain a first set of first spectral portions (904) and for decoding the encoded representation of the parametric data to obtain a decoded parametric data (902) for the second set of second spectral portions indicating, for individual reconstruction bands, individual energies; a frequency regenerator (906) for reconstructing spectral values in a reconstruction band (920) comprising a second spectral portion (922, 923) using a first spectral portion of the first set of the first spectral portions and an individual energy for the reconstruction band, the reconstruction band comprising a first spectral portion (921) and the second spectral portion; wherein the frequency regenerator (906) is configured for determining (912) a survive energy information comprising an accumulated energy of the first spectral portion having frequency values in the reconstruction band, determining (918) a tile energy information of further spectral portions (922, 923) of the reconstruction band (920) for frequency values different from the first spectral portion (921) having frequencies in the reconstruction band (920), wherein the further spectral portions (922, 923) are to be generated by frequency regeneration using a first spectral portion (302) different from the first spectral portion (921, 306) in the reconstruction band; determining (914) a missing energy in the reconstruction band (920) using the individual energy for the reconstruction band and the survive energy information; and adjusting (916) the further spectral portions in the reconstruction band based on the missing energy information and the tile energy information.

公开(公告)号：EP3996091A1

公开(公告)日：2022-05-11

申请号：EP21212614.8

申请日：2014-07-15

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

发明人： GHIDO, Florin ,  NIEDERMEIER, Andreas

IPC分类号： G10L19/02 ,  G10L19/032 ,  G10L21/038

摘要： An improved concept for coding sample values of a spectral envelope is obtained by combining spectrotemporal prediction on the one hand and context-based entropy coding the residuals, on the other hand, while particularly determining the context for a current sample value dependent on a measure of a deviation between a pair of already coded/decoded sample values of the spectral envelope in a spectrotemporal neighborhood of the current sample value. The combination of the spectrotemporal prediction on the one hand and the context-based entropy coding of the prediction residuals with selecting the context depending on the deviation measure on the other hand harmonizes with the nature of spectral envelopes.

公开(公告)号：EP3417544A1

公开(公告)日：2018-12-26

申请号：EP17703771.0

申请日：2017-02-10

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

发明人： GHIDO, Florin ,  DISCH, Sascha ,  HERRE, Jürgen ,  ADAMI, Alexander ,  REUTELHUBER, Franz

IPC分类号： H03G3/00 ,  H03G5/16

CPC分类号： G10L19/032 ,  G10L19/008 ,  G10L19/26 ,  H03G5/005 ,  H03G5/165

摘要： An audio post-processor for post-processing an audio signal having a time-variable high frequency gain information as side information includes: a band extractor for extracting a high frequency band of the audio signal and a low frequency band of the audio signal; a high band processor for performing a time-variable modification of the high frequency band in accordance with the time-variable high frequency gain information to obtain a processed high frequency band; and a combiner for combining the processed high frequency band and the low frequency band. Furthermore, a pre-processor is illustrated.

公开(公告)号：EP3025340A1

公开(公告)日：2016-06-01

申请号：EP14738854.0

申请日：2014-07-15

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

发明人： NIEDERMEIER, Andreas ,  ERTEL, Christian ,  GEIGER, Ralf ,  GHIDO, Florin ,  HELMRICH, Christian

IPC分类号： G10L19/028

CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/0208 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/025 ,  G10L19/03 ,  G10L19/032 ,  G10L19/06 ,  G10L21/0388 ,  G10L25/06 ,  H04S1/007

摘要： Apparatus for decoding an encoded audio signal comprising an encoded core signal (1), comprising: a core decoder (1400) for decoding the encoded core signal (1401) to obtain a decoded core signal; a tile generator (1404) for generating one or more spectral tiles having frequencies not included in the decoded core signal using a spectral portion of the decoded core signal; and a cross-over filter (1406) for spectrally cross-over filtering the decoded core signal and a first frequency tile having frequencies extending from a gap filling frequency (309) to an upper border frequency or for spectrally cross-over filtering a first frequency tile and a second frequency tile.

公开(公告)号：EP4348637A1

公开(公告)日：2024-04-10

申请号：EP22732930.7

申请日：2022-05-25

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

发明人： HERRE, Jürgen ,  GHIDO, Florin

IPC分类号： G10L19/008 ,  G10L19/04 ,  G10L19/02

公开(公告)号：EP4113512A1

公开(公告)日：2023-01-04

申请号：EP22192222.2

申请日：2018-11-16

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

发明人： FUCHS, Guillaume ,  HERRE, Jürgen ,  KÜCH, Fabian ,  DÖHLA, Stefan ,  MULTRUS, Markus ,  THIERGART, Oliver ,  WÜBBOLT, Oliver ,  GHIDO, Florin ,  BAYER, Stefan ,  JÄGERS, Wolfgang

IPC分类号： G10L19/00 ,  G10L19/008

摘要： An apparatus for encoding directional audio coding parameters comprising diffuseness parameters and direction parameters, comprises: a parameter calculator (100) for calculating the diffuseness parameters with a first time or frequency resolution and for calculating the direction parameters with a second time or frequency resolution; and a quantizer and encoder processor (200) for generating a quantized and encoded representation of the diffuseness parameters and the direction parameters.

公开(公告)号：EP3542361B1

公开(公告)日：2020-10-28

申请号：EP17807765.7

申请日：2017-11-16

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

发明人： ADAMI, Alexander ,  HERRE, Jürgen ,  DISCH, Sascha ,  GHIDO, Florin

IPC分类号： G10L21/0272