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公开(公告)号：EP1774515B1
公开(公告)日：2012-05-02
申请号：EP05740130.9
申请日：2005-05-12
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S3/00 , H04S2420/03
摘要： An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator for calculating a cancellation channel using information related to the original center channel available at the decoder. The device furthermore includes a combiner for combining a transmission channel with the cancellation channel. Finally, the apparatus includes a reconstructor for generating the multi-channel output signal. Due to the center channel cancellation, the channel reconstructor not only uses a different base channel for reconstructing the center channel but also uses base channels different from the transmission channels for reconstructing left and right output channels which have a reduced or even completely cancelled influence of the original center channel.
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公开(公告)号：EP1774515A1
公开(公告)日：2007-04-18
申请号：EP05740130.9
申请日：2005-05-12
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S3/00 , H04S2420/03
摘要： An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator for calculating a cancellation channel using information related to the original center channel available at the decoder. The device furthermore includes a combiner for combining a transmission channel with the cancellation channel. Finally, the apparatus includes a reconstructor for generating the multi-channel output signal. Due to the center channel cancellation, the channel reconstructor not only uses a different base channel for reconstructing the center channel but also uses base channels different from the transmission channels for reconstructing left and right output channels which have a reduced or even completely cancelled influence of the original center channel.
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公开(公告)号：EP4430856A1
公开(公告)日：2024-09-18
申请号：EP22813307.0
申请日：2022-11-08
发明人： SILZLE, Andreas , HERRE, Jürgen , ROSENBERGER, Dennis , PAULUS, Jouni , BORSS, Christian , ADAMI, Alexander
IPC分类号： H04S7/00
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公开(公告)号：EP4430855A1
公开(公告)日：2024-09-18
申请号：EP22813306.2
申请日：2022-11-08
发明人： SILZLE, Andreas , HERRE, Jürgen , ERONEN, Antti
IPC分类号： H04S7/00
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公开(公告)号：EP4430852A1
公开(公告)日：2024-09-18
申请号：EP22813285.8
申请日：2022-11-07
发明人： WU, Yun-Han , HERRE, Jürgen , KOROTIAEV, Mikhail , GEIER, Matthias , SCHWÄR, Simon , ADAMI, Alexander
IPC分类号： H04S7/00
CPC分类号： H04S7/302 , H04S7/307 , H04S2400/1120130101 , H04S2420/0120130101
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公开(公告)号：EP4398243A2
公开(公告)日：2024-07-10
申请号：EP24166906.8
申请日：2020-06-15
发明人： BOUTHÉON, Alexandre , FUCHS, Guillaume , MULTRUS, Markus , KÜCH, Fabian , THIERGART, Oliver , BAYER, Stefan , DISCH, Sascha , HERRE, Jürgen
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： There is disclosed audio synthesizer (300) for generating a synthesis signal (336) from a downmix signal (324, x) having a number of downmix channels, the synthesis signal (336) having a number of synthesis channels, the downmix signal (324, x) being a downmixed version of an original signal (212) having a number of original channels, the audio synthesizer (300) comprising:
a first path (610c') including:
a first mixing matrix block (600c) configured for synthesizing a first component (336M') of the synthesis signal according to a first mixing matrix (MM) calculated from:
a covariance matrix (CYR) associated to the synthesis signal (212); and
a covariance matrix (Cx) associated to the downmix signal (324),
a second path (610c) for synthesizing a second component (336R') of the synthesis signal, wherein the second component (336R') is a residual component, the second path (610c) including:
a prototype signal block (612c) configured for upmixing the downmix signal (324) from the number of downmix channels to the number of synthesis channels;
a decorrelator (614c) configured for decorrelating the upmixed prototype signal (613c);
a second mixing matrix block (618c) configured for synthesizing the second component (336R') of the synthesis signal according to a second mixing matrix (MR) from the decorrelated version (615c) of the downmix signal (324), the second mixing matrix (MR) being a residual mixing matrix,
wherein the audio synthesizer (300) is configured to calculate (618c) the second mixing matrix (MR) from:
the residual covariance matrix (Cr) provided by the first mixing matrix block(600c); and
an estimate of the covariance matrix of the decorrelated prototype signals (Cy ) obtained from the covariance matrix (Cx) associated to the downmix signal (324),
wherein the audio synthesizer (300) further comprises an adder block (620c) for summing the first component (336M') of the synthesis signal with the second component (336R') of the synthesis signal.-
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
发明人： HERRE, Jürgen , GHIDO, Florin
IPC分类号： G10L19/008
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公开(公告)号：EP4224475A1
公开(公告)日：2023-08-09
申请号：EP23180374.3
申请日：2009-12-11
IPC分类号： G10L21/038 , G10L19/24
摘要： A bandwidth extension decoder (500), (600) for providing a bandwidth extended audio signal (532) based on an input audio signal (502) and a parameter signal (504), wherein the parameter signal (504) comprises an indication of an offset frequency and an indication of a power density parameter, comprises: a patch generator (510) configured to generate a bandwidth extension high-frequency signal (512) comprising a high-frequency band, wherein the high-frequency band of the bandwidth extension high-frequency signal (512) is generated based on a frequency shift of a frequency band of the input audio signal (502), wherein the frequency shift is based on the offset frequency, and wherein the patch generator (510) is configured to amplify or attenuate the high-frequency band of the bandwidth extension high-frequency signal (512) by a factor equal to the value of the power density parameter or equal to the reciprocal value of the power density parameter, respectively; a combiner (529) configured to combine the bandwidth extension high-frequency signal (512) and the input audio signal (502) to obtain the bandwidth extended audio signal (532); and an output interface (530) configured to provide the bandwidth extended audio signal (532) .
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9.发明公开
公开(公告)号：EP4123645A1
公开(公告)日：2023-01-25
申请号：EP22191567.1
申请日：2017-01-20
发明人： RAVELLI, Emmanuel , SCHNELL, Markus , DÖHLA, Stefan , JAEGERS, Wolfgang , DIETZ, Martin , HELMRICH, Christian , MARKOVIC, Goran , FOTOPOULOU, Eleni , MULTRUS, Markus , BAYER, Stefan , FUCHS, Guillaume , HERRE, Jürgen
IPC分类号： G10L19/008 , G10L19/22 , G10L19/02
摘要： Fig. 1 illustrates an apparatus for encoding a first channel and a second channel of an audio input signal comprising two or more channels to obtain an encoded audio signal according to an embodiment. The apparatus comprises a normalizer (110) configured to determine a normalization value for the audio input signal depending on the first channel of the audio input signal and depending on the second channel of the audio input signal, wherein the normalizer (110) is configured to determine a first channel and a second channel of a normalized audio signal by modifying, depending on the normalization value, at least one of the first channel and the second channel of the audio input signal. Moreover, the apparatus comprises an encoding unit (120) being configured to generate a processed audio signal having a first channel and a second channel, such that one or more spectral bands of the first channel of the processed audio signal are one or more spectral bands of the first channel of the normalized audio signal, such that one or more spectral bands of the second channel of the processed audio signal are one or more spectral bands of the second channel of the normalized audio signal, such that at least one spectral band of the first channel of the processed audio signal is a spectral band of a mid signal depending on a spectral band of the first channel of the normalized audio signal and depending on a spectral band of the second channel of the normalized audio signal, and such that at least one spectral band of the second channel of the processed audio signal is a spectral band of a side signal depending on a spectral band of the first channel of the normalized audio signal and depending on a spectral band of the second channel of the normalized audio signal. The encoding unit (120) is configured to encode the processed audio signal to obtain the encoded audio signal.
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10.发明公开
公开(公告)号：EP3899936A1
公开(公告)日：2021-10-27
申请号：EP19824332.1
申请日：2019-12-20
发明人： UHLE, Christian , TORCOLI, Matteo , DISCH, Sascha , PAULUS, Jouni , HERRE, Jürgen , HELLMUTH, Oliver , FUCHS, Harald
IPC分类号： G10L21/0308 , G10L25/30 , G10L25/60
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