公开(公告)号：EP4421803A2

公开(公告)日：2024-08-28

申请号：EP24188661.3

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 ,  FÜG, Richard ,  NAGEL, Frederik

IPC分类号： G10L19/028

CPC分类号： G10L19/028 ,  G10L19/008

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：EP3618460A1

公开(公告)日：2020-03-04

申请号：EP19203003.9

申请日：2015-01-05

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

发明人： BORSS, Christian ,  HILPERT, Johannes ,  KUNTZ, Achim ,  FISCHER, Michael ,  SCHUH, Florian ,  GRILL, Bernhard ,  ERTEL, Christian

IPC分类号： H04S3/02 ,  H04S7/00

摘要： An apparatus for generating a plurality of audio channels for a first speaker setup is characterized by an imaginary speaker determiner, an energy distribution calculator, a processor and a renderer. The imaginary speaker determiner is configured to determine a position of an imaginary speaker not contained in the first speaker setup to obtain a second speaker setup containing the imaginary speaker. The energy distribution calculator is configured to calculate an energy distribution from the imaginary speaker to the other speakers in the second speaker setup. The processor is configured to repeat the energy distribution to obtain a downmix information for a downmix from the second speaker setup to the first speaker setup. The renderer is configured to generate the plurality of audio channels using the downmix information.

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：EP3629326A1

公开(公告)日：2020-04-01

申请号：EP19209185.8

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 ,  Füg, 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：EP3268959B1

公开(公告)日：2019-08-14

申请号：EP16709344.2

申请日：2016-03-08

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

发明人： DICK, Sascha ,  SCHUH, Florian ,  RETTELBACH, Nikolaus ,  SCHWEGLER, Tobias ,  FÜG, Richard ,  HILPERT, Johannes ,  NEUSINGER, Matthias

IPC分类号： G10L19/008

公开(公告)号：EP3268959A1

公开(公告)日：2018-01-17

申请号：EP16709344.2

申请日：2016-03-08

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

发明人： DICK, Sascha ,  SCHUH, Florian ,  RETTELBACH, Nikolaus ,  SCHWEGLER, Tobias ,  FÜG, Richard ,  HILPERT, Johannes ,  NEUSINGER, Matthias

IPC分类号： G10L19/008

CPC分类号： G10L19/008 ,  G10L19/02 ,  H04S3/008 ,  H04S2400/01

摘要： Embodiments provide an apparatus for encoding a multi-channel signal having at least three channels. The apparatus comprises an iteration processor, a channel encoder and an output interface. The iteration processor is configured to calculate, in a first iteration step, inter-channel correlation values between each pair of the at least three channels, for selecting, in the first iteration step, a pair having a highest value or having a value above a threshold, and for processing the selected pair using a multi-channel processing operation to derive first multi-channel parameters for the selected pair and to derive first processed channels. Further, the iteration processor is configured to perform the calculating, the selecting and the processing in a second iteration step using at least one of the processed channels to derive second multi-channel parameters and second processed channels. The channel encoder is configured to encode channels resulting from an iteration processing performed by the iteration processor to obtain encoded channels. The output interface is configured to generate an encoded multi-channel signal having the encoded channels and the first and the second multi-channel parameters.

公开(公告)号：EP4351173A3

公开(公告)日：2024-06-19

申请号：EP24159429.0

申请日：2015-01-05

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

发明人： BORSS, Christian ,  ERTEL, Christian ,  HILPERT, Johannes ,  KUNTZ, Achim ,  FISCHER, Michael ,  SCHUH, Florian ,  GRILL, Bernhard

IPC分类号： H04S7/00 ,  H04S3/02

CPC分类号： H04S3/02 ,  H04S7/30 ,  H04S2400/0320130101 ,  H04S2400/1120130101

摘要： An apparatus for generating a plurality of audio channels for a first speaker setup is characterized by an imaginary speaker determiner, an energy distribution calculator, a processor and a renderer. The imaginary speaker determiner is configured to determine a position of an imaginary speaker not contained in the first speaker setup to obtain a second speaker setup containing the imaginary speaker. The energy distribution calculator is configured to calculate an energy distribution from the imaginary speaker to the other speakers in the second speaker setup. The processor is configured to repeat the energy distribution to obtain a downmix information for a downmix from the second speaker setup to the first speaker setup. The renderer is configured to generate the plurality of audio channels using the downmix information.

公开(公告)号：EP3353782A1

公开(公告)日：2018-08-01

申请号：EP16777607.9

申请日：2016-09-23

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

发明人： HELMRICH, Christian ,  EDLER, Bernd ,  SCHWEGLER, Tobias ,  SCHUH, Florian

IPC分类号： G10L19/022 ,  G10L19/02 ,  G10L19/22

CPC分类号： G10L19/022 ,  G10L19/0212 ,  G10L19/22

摘要： A decoder for decoding a plurality of spectral-domain audio samples is provided. The decoder comprises a first decoding module (110) for generating a first group and a second group of time-domain intermediate audio samples from the spectral-domain audio samples. Moreover, the decoder comprises an overlap-adder (130) for overlap-adding the first group of time-domain intermediate audio samples with an overlap of more than 5 % and at most 50 % with the second group of time-domain intermediate audio samples. Furthermore, the decoder comprises a second decoding module (120) for generating a third group and a fourth group of time-domain intermediate audio samples from the spectral-domain audio samples. Moreover, the decoder comprises an output interface (140). The overlap-adder (130) is configured to overlap-add at least the third group of time-domain intermediate audio samples with an overlap of more than 60 % and less than 100 % with the fourth group of time-domain intermediate audio samples. Moreover, the overlap-adder (130) is configured to overlap-add at least the second group and the third group of time-domain intermediate audio samples, or to overlap-add at least the fourth group and the first group of time-domain intermediate audio samples.

公开(公告)号：EP3092823A1

公开(公告)日：2016-11-16

申请号：EP15700180.1

申请日：2015-01-05

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

发明人： BORSS, Christian ,  ERTEL, Christian ,  HILPERT, Johannes ,  KUNTZ, Achim ,  FISCHER, Michael ,  SCHUH, Florian ,  GRILL, Bernhard

IPC分类号： H04S3/02 ,  H04S7/00

摘要： An apparatus for generating a plurality of audio channels for a first speaker setup is characterized by an imaginary speaker determiner, an energy distribution calculator, a processor and a renderer. The imaginary speaker determiner is configured to determine a position of an imaginary speaker not contained in the first speaker setup to obtain a second speaker setup containing the imaginary speaker. The energy distribution calculator is configured to calculate an energy distribution from the imaginary speaker to the other speakers in the second speaker setup. The processor is configured to repeat the energy distribution to obtain a downmix information for a downmix from the second speaker setup to the first speaker setup. The renderer is configured to generate the plurality of audio channels using the downmix information.

摘要翻译： 用于产生用于第一扬声器设置的多个音频通道的装置的特征在于虚拟扬声器确定器，能量分布计算器，处理器和渲染器。 虚拟扬声器确定器被配置为确定不包含在第一扬声器设置中的虚拟扬声器的位置，以获得包含虚拟扬声器的第二扬声器设置。 能量分布计算器被配置为在第二扬声器设置中计算从虚拟扬声器到其它扬声器的能量分布。 处理器被配置为重复能量分布以获得用于从第二扬声器设置到第一扬声器设置的下混的下混信息。 渲染器被配置为使用下混信息来生成多个音频通道。

公开(公告)号：EP4421803A3

公开(公告)日：2024-10-30

申请号：EP24188661.3

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 ,  FÜG, 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.