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公开(公告)号：EP3025521B1
公开(公告)日：2019-05-01
申请号：EP14753020.8
申请日：2014-07-14
发明人： ERTEL, Christian , HILPERT, Johannes , HÖLZER, Andreas , KUNTZ, Achim , PLOGSTIES, Jan , KRATSCHMER, Michael
IPC分类号： H04S7/00 , H04S5/00 , G10L19/008
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公开(公告)号：EP3123741B1
公开(公告)日：2019-02-20
申请号：EP15716439.3
申请日：2015-03-25
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公开(公告)号：EP3025341A1
公开(公告)日：2016-06-01
申请号：EP14744026.7
申请日：2014-07-18
IPC分类号： G10L19/028 , G10L19/032
CPC分类号： G10L19/028 , G10L19/008 , G10L19/035 , H04S3/008 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.
摘要翻译： 在多声道音频编码中，通过以下措施来实现改进的编码效率：使用除人为产生的噪声或频谱复制品之外的噪声填充源来执行零量化比例因子频带的噪声填充。 特别地，通过基于使用来自多声道音频信号的当前帧的先前帧或不同频道的频谱线产生的噪声执行噪声填充，可以使多声道音频编码中的编码效率更高效。
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4.发明公开AUDIO DECODER, AUDIO ENCODER, METHOD FOR PROVIDING AT LEAST FOUR AUDIO CHANNEL SIGNALS ON THE BASIS OF AN ENCODED REPRESENTATION, METHOD FOR PROVIDING AN ENCODED REPRESENTATION ON THE BASIS OF AT LEAST FOUR AUDIO CHANNEL SIGNALS AND COMPUTER PROGRAM USING A BANDWIDTH EXTENSION 有权音频解码器，音频编码器，方法用于基于编码表示至少有四个声道的音频信号，为了提供编码表示方法基于至少四声道音频信号和计算机程序有带宽扩展
公开(公告)号：EP3022734A1
公开(公告)日：2016-05-25
申请号：EP14738535.5
申请日：2014-07-14
发明人： DICK, Sascha , ERTEL, Christian , HELMRICH, Christian , HILPERT, Johannes , HÖLZER, Andreas , KUNTZ, Achim
IPC分类号： G10L19/008 , G10L21/038
CPC分类号： G10L19/008 , G10L19/0017 , G10L21/038 , H04S3/008 , H04S7/30 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： An audio decoder for providing at least four bandwidth-extended channel signals on the basis of an encoded representation is configured to provide a first downmix signal and a second downmix signal on the basis of a jointly encoded representation of the first downmix signal and the second downmix signal using a multi-channel decoding. The audio decoder is configured to provide at least a first audio channel signal and a second audio channel signal on the basis of the first downmix signal using a multi-channel decoding. The audio decoder is configured to provide at least a third audio channel signal and a fourth audio channel signal on the basis of the second downmix signal using a multi-channel decoding. The audio decoder is configured to perform a multi-channel bandwidth extension on the basis of the first audio channel signal and the third audio channel signal, to obtain a first bandwidth-extended channel signal and a third bandwidth-extended channel signal. The audio decoder is configured to perform a multi-channel bandwidth extension on the basis of the second audio channel signal and the fourth audio channel signal, to obtain a second bandwidth extended channel signal and a fourth bandwidth extended channel signal. An audio encoder uses a related concept.
摘要翻译： 用于编码表示的基础上，提供至少四个带宽扩展信道信号的音频解码器被配置为提供一个第一混合信号和所述第一混合信号的联合编码表示的基础上，第二缩混信号和所述第二下混 利用信号的多声道解码。 音频解码器被配置为提供至少一个第一音频信道信号，并使用多通道解码所述第一缩混信号的基础上的第二音频信道信号。 音频解码器被配置为提供至少一个第三通道的音频信号，并使用多通道解码所述第二缩混信号的基础上的第四信道的音频信号。 音频解码器被配置为将第一音频信道信号和第三音频信道信号的基础上执行多通道带宽扩展，以获得第一带宽扩展信道信号和第三带宽扩展信道信号。 音频解码器被配置为将第二音频信道信号和所述第四音频信道信号的基础上执行多通道带宽扩展，以获得第二带宽扩展信道信号和第四信道带宽扩展信号。 音频编码器使用相关的概念。
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5.发明授权LOW BITRATE AUDIO ENCODING/DECODING SCHEME HAVING CASCADED SWITCHES 有权音频编码/解码方案LOW BIT具有叶栅CIRCUITS RATE
公开(公告)号：EP2301023B1
公开(公告)日：2016-03-23
申请号：EP09793874.0
申请日：2009-06-26
发明人： GRILL, Bernhard , LEFEBVRE, Roch , BESSETTE, Bruno , LAPIERRE, Jimmy , GOURNAY, Philippe , SALAMI, Redwan , BAYER, Stefan , FUCHS, Guillaume , GEYERSBERGER, Stefan , GEIGER, Ralf , HILPERT, Johannes , KRAEMER, Ulrich , LECOMTE, Jeremie , MULTRUS, Markus , NEUENDORF, Max , POPP, Harald , RETTELBACH, Nikolaus
IPC分类号： G10L19/008 , G10L19/18 , G10L19/16 , G10L19/02 , G10L19/00
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/173 , G10L19/18 , G10L2019/0008
摘要： An audio encoder comprises a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch comprises a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and wherein the second encoding branch furthermore comprises a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder comprises a first domain decoder such as a spectral domain decoding branch, a second domain decoder such as an LPC domain decoding branch for decoding a signal such as an excitation signal in the second domain, and a third domain decoder such as an LPC-spectral decoder branch and two cascaded switches for switching between the decoders.
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6.发明授权
公开(公告)号：EP2676269B1
公开(公告)日：2015-12-16
申请号：EP12706001.0
申请日：2012-02-14
发明人： GEIGER, Ralf , SCHMIDT, Konstantin , GRILL, Bernhard , LUTZKY, Manfred , WERNER, Michael , GAYER, Marc , HILPERT, Johannes , LUIS VALERO, Maria , JAEGERS, Wolfgang
IPC分类号： G10L19/03
CPC分类号： G10L19/00 , G10K11/16 , G10L19/005 , G10L19/012 , G10L19/0212 , G10L19/025 , G10L19/03 , G10L19/04 , G10L19/107 , G10L19/12 , G10L19/22 , G10L19/26 , G10L21/0216 , G10L25/06 , G10L25/78
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公开(公告)号：EP2304975B1
公开(公告)日：2014-08-27
申请号：EP09777567.0
申请日：2009-07-30
CPC分类号： H04S3/004 , H04S7/30 , H04S2400/01 , H04S2420/01
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8.发明公开APPARATUS, METHOD AND COMPUTER PROGRAM FOR UPMIXING A DOWNMIX AUDIO SIGNAL 有权设备，方法和计算机程序UP MIX的缩混音频信号
公开(公告)号：EP2380167A1
公开(公告)日：2011-10-26
申请号：EP10701119.9
申请日：2010-01-12
CPC分类号： G10L19/008
摘要： An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels comprises an upmixer configured to apply temporally variable upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The apparatus also comprises a parameter interpolator, wherein the parameter interpolator is configured to obtain one or more temporally interpolated upmix parameters to be used by the upmixer on the basis of a first complex-valued upmix parameter and a subsequent second complex-valued upmix parameter. The parameter interpolator is configured to separately interpolate between a magnitude value of the first complex-valued upmix parameter and a magnitude value of the second complex-valued upmix parameter, and between a phase value of the first complex-valued upmix parameter and a phase value of the second complex-valued upmix parameter, to obtain the one or more temporally interpolated upmix parameters. A respective method can be implemented, for example, as a computer program.
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公开(公告)号：EP2137725A1
公开(公告)日：2009-12-30
申请号：EP08749081.9
申请日：2008-04-23
发明人： ENGDEGARD, Jonas , VILLEMORS, Lars , PURNHAGEN, Heiko , RESCH, Barbara , FALCH, Cornelia , HERRE, Juergen , HILPERT, Johannes , HOELZER, Andreas , TERENTIEV, Leonid
CPC分类号： H04S1/007 , G10L19/008 , H04S2400/01
摘要： An apparatus for synthesizing a rendered output signal having a first audio channel and a second audio channel includes a decorrelator stage (356) for generating a decorrelator signal based on a downmix signal, and a combiner (364) for performing a weighted combination of the downmix signal and a decorrelated signal based on parametric audio object information (362), downmix information (354) and target rendering information (360). The combiner solves the problem of optimally combining matrixing with decorrelation for a high quality stereo scene reproduction of a number of individual audio objects using a multichannel downmix.
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公开(公告)号：EP2076900A1
公开(公告)日：2009-07-08
申请号：EP08839058.8
申请日：2008-10-17
发明人： HELLMUTH, Oliver , HERRE, Juergen , TERENTIEV, Leonid , HOELZER, Andreas , FALCH, Cornelia , HILPERT, Johannes
IPC分类号： G10L19/00
CPC分类号： G10L19/04 , G10L19/008 , G10L19/20 , H04S3/002 , H04S2420/03 , H04S2420/07
摘要： A method for decoding a multi-audio-object signal having an audio signal of a first type and an audio signal of a second type encoded therein is described, the multi-audio- object signal consisting of a downmix signal (112) and side information, the side information comprising level information of the audio signal of the first type and the audio signal of the second type in a first predetermined time/frequency resolution, the method comprising computing a prediction coefficient matrix C based on the level information (OLD); and up-mixing the downmix signal based on the prediction coefficients to obtain a first up-mix audio signal approximating the audio signal of the first type and/or a second up-mix audio signal approximating the audio signal of the second type, wherein the up-mixing yields the first up-mix signal S
1 and/or the second up-mix signal S2 from the downmix signal d according to a computation representable by (formula I) where the '1' denotes - depending on the number of channels of d - a scalar, or an identity matrix, and D
-1 is a matrix uniquely determined by a downmix prescription according to which the audio signal of the first type and the audio signal of the second type are downmixed into the downmix signal, and which is also comprised by the side information, and H is a term being independent from d.
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