公开(公告)号：EP3588495A1

公开(公告)日：2020-01-01

申请号：EP18179373.8

申请日：2018-06-22

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： BÜTHE, Jan ,  FOTOPOULOU, Eleni ,  KORSE, Srikanth ,  MABEN, Pallavi ,  MULTRUS, Markus ,  REUTELHUBER, Franz

IPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/06

摘要： In multichannel audio coding, improved computational efficiency is achieved by computing comparison parameters for ITD compensation between any two channels in the frequency domain for a parametric audio encoder. This may mitigate negative effects on encoder parameter estimates.

公开(公告)号：EP4447043A2

公开(公告)日：2024-10-16

申请号：EP24197969.9

申请日：2020-03-04

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

发明人： REUTELHUBER, Franz ,  EDLER, Bernd ,  FOTOPOULOU, Eleni ,  MULTRUS, Markus ,  MABEN, Pallavi ,  DISCH, Sascha

IPC分类号： G10L19/02

摘要： A down mixer for downmixing a multi-channel signal having at least two channels, comprises: a weighting value estimator (100) for estimating band-wise weighting values for the at least two channels; a spectral weighter (200) for weighting spectral domain representations of the at least two channels using the band-wise weighting values; a converter (300) for converting weighted spectral domain representations of the at least two channels into time representations of the at least two channels; and a mixer (400) for mixing the time representations of the at least two channels to obtain a downmix signal.

公开(公告)号：EP4336497A3

公开(公告)日：2024-03-20

申请号：EP24153258.9

申请日：2019-06-27

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

发明人： FOTOPOULOU, Eleni ,  MULTRUS, Markus ,  DICK, Sascha ,  MARKOVIC, Goran ,  MABEN, Pallavi ,  KORSE, Srikanth ,  BAYER, Stefan ,  DISCH, Sascha ,  HERRE, Jürgen

IPC分类号： G10L19/008 ,  G10L19/03

摘要： A multisignal encoder for encoding at least three audio signals, comprises: a signal preprocessor (100) for individually preprocessing each audio signal to obtain at least three preprocessed audio signals, wherein the preprocessing is performed so that a preprocessed audio signal is whitened with respect to the signal before preprocessing; an adaptive joint signal processor (200) for performing a processing of the at least three preprocessed audio signals to obtain at least three jointly processed signals or at least two jointly processed signals and an unprocessed signal; a signal encoder (300) for encoding each signal to obtain one or more encoded signals; and an output interface (400) for transmitting or storing an encoded multisignal audio signal comprising the one or more encoded signals, side information relating to the preprocessing and side information relating to the processing.

公开(公告)号：EP3935630A1

公开(公告)日：2022-01-12

申请号：EP20706774.5

申请日：2020-03-04

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

发明人： REUTELHUBER, Franz ,  EDLER, Bernd ,  FOTOPOULOU, Eleni ,  MULTRUS, Markus ,  MABEN, Pallavi ,  DISCH, Sascha

IPC分类号： G10L19/008 ,  H04S3/02 ,  H03G5/16 ,  G10L19/02

公开(公告)号：EP4435783A2

公开(公告)日：2024-09-25

申请号：EP24194360.4

申请日：2019-04-03

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

发明人： FOTOPOULOU, Eleni ,  BÜTHE, Jan ,  RAVELLI, Emmanuel ,  MABEN, Pallavi ,  DIETZ, Martin ,  REUTELHUBER, Franz ,  DÖHLA, Stefan ,  KORSE, Srikanth

IPC分类号： G10L25/06

CPC分类号： G10L19/008 ,  G10L25/06

摘要： An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, comprises a signal analyzer (1037) for estimating a signal characteristic (1038) of the first channel signal or the second channel signal or both signals or a signal derived from the first channel signal or the second channel signal; a calculator (1020) for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a weighter (1036) for weighting a smoothed or non-smoothed cross-correlation spectrum to obtain a weighted cross correlation spectrum using a first weighting procedure (1036a) or using a second weighting procedure (1036b) depending on a signal characteristic estimated by the signal analyzer (1037), wherein the first weighting procedure is different from the second weighting procedure; and a processor (1040) for processing the weighted cross-correlation spectrum to obtain the inter-channel time difference.

公开(公告)号：EP3985665A1

公开(公告)日：2022-04-20

申请号：EP21212592.6

申请日：2019-04-03

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

发明人： FOTOPOULOU, Eleni ,  BÜTHE, Jan ,  RAVELLI, Emmanuel ,  MABEN, Pallavi ,  DIETZ, Martin ,  REUTELHUBER, Franz ,  DÖHLA, Stefan ,  KORSE, Srikanth

IPC分类号： G10L19/008 ,  G10L25/06

摘要： An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, comprises a signal analyzer (1037) for estimating a signal characteristic (1038) of the first channel signal or the second channel signal or both signals or a signal derived from the first channel signal or the second channel signal; a calculator (1020) for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a weighter (1036) for weighting a smoothed or non-smoothed cross-correlation spectrum to obtain a weighted cross correlation spectrum using a first weighting procedure (1036a) or using a second weighting procedure (1036b) depending on a signal characteristic estimated by the signal analyzer (1037), wherein the first weighting procedure is different from the second weighting procedure; and a processor (1040) for processing the weighted cross-correlation spectrum to obtain the inter-channel time difference.

公开(公告)号：EP3818520A1

公开(公告)日：2021-05-12

申请号：EP19732704.2

申请日：2019-06-27

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

发明人： FOTOPOULOU, Eleni ,  MULTRUS, Markus ,  DICK, Sascha ,  MARKOVIC, Goran ,  MABEN, Pallavi ,  KORSE, Srikanth ,  BAYER, Stefan ,  DISCH, Sascha ,  HERRE, Jürgen

IPC分类号： G10L19/008 ,  G10L19/03

公开(公告)号：EP4336497A2

公开(公告)日：2024-03-13

申请号：EP24153258.9

申请日：2019-06-27

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

发明人： FOTOPOULOU, Eleni ,  MULTRUS, Markus ,  DICK, Sascha ,  MARKOVIC, Goran ,  MABEN, Pallavi ,  KORSE, Srikanth ,  BAYER, Stefan ,  DISCH, Sascha ,  HERRE, Jürgen

IPC分类号： G10L19/03

摘要： A multisignal encoder for encoding at least three audio signals, comprises: a signal preprocessor (100) for individually preprocessing each audio signal to obtain at least three preprocessed audio signals, wherein the preprocessing is performed so that a preprocessed audio signal is whitened with respect to the signal before preprocessing; an adaptive joint signal processor (200) for performing a processing of the at least three preprocessed audio signals to obtain at least three jointly processed signals or at least two jointly processed signals and an unprocessed signal; a signal encoder (300) for encoding each signal to obtain one or more encoded signals; and an output interface (400) for transmitting or storing an encoded multisignal audio signal comprising the one or more encoded signals, side information relating to the preprocessing and side information relating to the processing.

公开(公告)号：EP3877976A1

公开(公告)日：2021-09-15

申请号：EP19795246.8

申请日：2019-11-05

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： BAYER, Stefan ,  MABEN, Pallavi ,  RAVELLI, Emmanuel ,  FUCHS, Guillaume ,  FOTOPOULOU, Eleni ,  MULTRUS, Markus

IPC分类号： G10L19/022 ,  G10L25/45 ,  G10L19/008

公开(公告)号：EP3811357A1

公开(公告)日：2021-04-28

申请号：EP19732348.8

申请日：2019-06-19

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： BÜTHE, Jan ,  FOTOPOULOU, Eleni ,  KORSE, Srikanth ,  MABEN, Pallavi ,  MULTRUS, Markus ,  REUTELHUBER, Franz

IPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/06