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81. 发明公开

EP4369335A1 NOISE FILLING IN MULTICHANNEL AUDIO CODING 审中-公开
公开(公告)号：EP4369335A1
公开(公告)日：2024-05-15
申请号：EP24167391.2
申请日：2014-07-18
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： LUIS VALERO, Maria , HELMRICH, Christian , HILPERT, Johannes
IPC分类号： G10L19/008 , G10L19/028 , G10L19/035
CPC分类号： G10L19/028 , G10L19/008 , G10L19/035
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.

82. 发明公开

EP4351173A2 APPARATUS AND METHOD FOR GENERATING A PLURALITY OF AUDIO CHANNELS 审中-实审
公开(公告)号：EP4351173A2
公开(公告)日：2024-04-10
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
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.

83. 发明公开

EP4307126A3 CONCEPT FOR BRIDGING THE GAP BETWEEN PARAMETRIC MULTI-CHANNEL AUDIO CODING AND MATRIXED-SURROUND MULTI-CHANNEL CODING 审中-实审
公开(公告)号：EP4307126A3
公开(公告)日：2024-03-27
申请号：EP23214134.1
申请日：2006-06-21
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Dolby Laboratories Licensing Corporation
发明人： HILPERT, Johannes , FALLER, Christof , LINZMEIER, Karsten , SPERSCHNEIDER, Ralph
IPC分类号： G10L19/008 , G06F12/0815 , H04S3/02
摘要： The purpose of the invention is to bridge the gap between parametric multi-channel audio coding and matrixed-surround multi-channel coding by gradually improving the sound of an up-mix signal while raising the bit-rate consumed by the side-information starting from 0 up to the bit-rates of the parametric methods. More specifically, it provides a method of flexibly choosing an "operating point" somewhere between matrixed-surround (no side-information, limited audio quality) and fully parametric reconstruction (full side-information rate required, good quality). This operating point can be chosen dynamically (i.e. varying over time) and in response to the permissible side-information rate, as it is dictated by the individual application.

84. 发明公开

EP4307124A3 CONCEPT FOR BRIDGING THE GAP BETWEEN PARAMETRIC MULTI-CHANNEL AUDIO CODING AND MATRIXED-SURROUND MULTI-CHANNEL CODING 审中-实审
公开(公告)号：EP4307124A3
公开(公告)日：2024-03-27
申请号：EP23214132.5
申请日：2006-06-21
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Dolby Laboratories Licensing Corporation
发明人： HILPERT, Johannes , FALLER, Christof , LINZMEIER, Karsten , SPERSCHNEIDER, Ralph
IPC分类号： G10L19/008 , G06F12/0815 , H04S3/02
摘要： The purpose of the invention is to bridge the gap between parametric multi-channel audio coding and matrixed-surround multi-channel coding by gradually improving the sound of an up-mix signal while raising the bit-rate consumed by the side-information starting from 0 up to the bit-rates of the parametric methods. More specifically, it provides a method of flexibly choosing an "operating point" somewhere between matrixed-surround (no side-information, limited audio quality) and fully parametric reconstruction (full side-information rate required, good quality). This operating point can be chosen dynamically (i.e. varying over time) and in response to the permissible side-information rate, as it is dictated by the individual application.

85. 发明授权

EP3092823B1 APPARATUS AND METHOD FOR GENERATING A PLURALITY OF AUDIO CHANNELS 有权
公开(公告)号：EP3092823B1
公开(公告)日：2019-11-27
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

86. 发明公开

EP3025521A2 RENDERER CONTROLLED SPATIAL UPMIX 有权
标题翻译： DURCH RENDERER GESTEUERTERÄUMLICHEAUFWÄRTSMISCHUNG
公开(公告)号：EP3025521A2
公开(公告)日：2016-06-01
申请号：EP14753020.8
申请日：2014-07-14
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： ERTEL, Christian , HILPERT, Johannes , HÖLZER, Andreas , KUNTZ, Achim , PLOGSTIES, Jan , KRATSCHMER, Michael
IPC分类号： H04S7/00 , H04S5/00
CPC分类号： H04S5/005 , G10L19/008 , H04S5/00 , H04S7/308 , H04S2400/01 , H04S2400/03 , H04S2400/05 , H04S2420/03
摘要： An audio decoder device for decoding a compressed input audio signal comprising at least one core decoder (6, 24) having one or more processors (36, 36') for generating a processor output signal (37) based on a processor input signal (38, 38'), wherein a number of output channels (37.1, 37.2, 37.1', 37.2') of the processor output signal (37, 37') is higher than a number of input channels (38.1, 38.1') of the processor input signal (38, 38'), wherein each of the one or more processors (36, 36') comprises a decorrelator (39, 39') and a mixer (40, 40'), wherein a core decoder output signal (13) having a plurality of channels (13.1, 13.2, 13.3, 13,4) comprises the processor output signal (37, 37'), and wherein the core decoder output signal (13) is suitable for a reference loudspeaker setup (42); at least one format converter device (9, 10) configured to convert the core decoder output signal (13) into an output audio signal (31), which is suitable for a target loudspeaker setup (45); and a control device (46) configured to control at least one or more processors (36, 36') in such way that the decorrelator (39, 39') of the processor (36, 36') may be controlled independently from the mixer (40, 40') of the processor (36, 36'), wherein the control device (46) is configured to control at least one of the decorrelators (39, 39') of the one or more processors (36, 36') depending on the target loudspeaker setup (45).
摘要翻译：一种用于解码压缩输入音频信号的音频解码器装置，包括至少一个具有一个或多个处理器（36,36'）的核心解码器（6,24），用于基于处理器输入信号（38）产生处理器输出信号（37），38'），其中所述处理器输出信号（37,37'）的多个输出通道（37.1,37.2,37.1'，37.2'）高于所述处理器的多个输入通道（38.1,38.1'）输入信号（38,38'），其中所述一个或多个处理器（36,36'）中的每一个包括去相关器（39,39'）和混频器（40,40'），其中核心解码器输出信号）包括所述处理器输出信号（37,37'），并且其中所述核心解码器输出信号（13）适用于参考扬声器设置（42）;所述多个信道（13.1,13.2,13.3,134）至少一个格式转换器装置（9,10），被配置为将所述核心解码器输出信号（13）转换成适合于目标扬声器设置（45）的输出音频信号（31）; 以及控制装置（46），被配置为以这样的方式控制至少一个或多个处理器（36,36'），使得处理器（36,36'）的去相关器（39,39'）可以独立于混频器（36,36'）的所述解相关器（40,40'）中的至少一个处理器（36,36'）被配置成控制所述处理器（36,36'）的所述解相关器（39,39'）中的至少一个，）取决于目标扬声器设置（45）。

87. 发明公开

EP3025331A1 MULTI-CHANNEL AUDIO DECODER, MULTI-CHANNEL AUDIO ENCODER, METHODS AND COMPUTER PROGRAM USING A RESIDUAL-SIGNAL-BASED ADJUSTMENT OF A CONTRIBUTION OF A DECORRELATED SIGNAL 有权转让
标题翻译：多声道音频解码器，多路音频编码器，方法和计算机程序WITH A去相关的信号的贡献的复位信号基础的适应
公开(公告)号：EP3025331A1
公开(公告)日：2016-06-01
申请号：EP14739486.0
申请日：2014-07-17
申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V.
发明人： DICK, Sascha , HELMRICH, Christian , HILPERT, Johannes , HÖLZER, Andreas
IPC分类号： G10L19/008 , G10L19/20
CPC分类号： G10L19/008 , G10L19/20 , G10L19/22 , H04S1/007 , H04S3/02 , H04S2400/03 , H04S2420/07
摘要： A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation is configured to perform a weighted combination of a downmix signal, a decorrelated signal and a residual signal, to obtain one of the output audio signals. The multi-channel audio decoder is configured to determine a weight describing a contribution of the decorrelated signal in the weighted combination in dependence on the residual signal. A multi-channel audio encoder for providing an encoded representation of a multi-channel audio signal is configured to obtain a downmix signal on the basis of the multi-channel audio signal, to provide parameters describing dependencies between the channels of the multi-channel audio signal, and to provide a residual signal. The multi-channel audio encoder is configured to vary an amount of residual signal included into the encoded representation in dependence on the multi-channel audio signal.

88. 发明公开

EP3025329A1 CONCEPT FOR AUDIO ENCODING AND DECODING FOR AUDIO CHANNELS AND AUDIO OBJECTS 有权转让
标题翻译： CONCEPT音频通讯渠道和音频对象音频编码和解码音频
公开(公告)号：EP3025329A1
公开(公告)日：2016-06-01
申请号：EP14739196.5
申请日：2014-07-16
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： ADAMI, Alexander , BORSS, Christian , DICK, Sascha , ERTEL, Christian , FÜG, Simone , HERRE, Jürgen , HILPERT, Johannes , HÖLZER, Andreas , KRATSCHMER, Michael , KÜCH, Fabian , KUNTZ, Achim , MURTAZA, Adrian , PLOGSTIES, Jan , SILZLE, Andreas , STENZEL, Hanne
IPC分类号： G10L19/008
CPC分类号： G10L19/20 , G10L19/008 , G10L19/028 , G10L19/18 , G10L19/22 , H04S3/008 , H04S2400/03 , H04S2400/11
摘要： Audio encoder for encoding audio input data (101) to obtain audio output data (501) comprises an input interface (100) for receiving a plurality of audio channels, a plurality of audio objects and metadata related to one or more of the plurality of audio objects; a mixer (200) for mixing the plurality of objects and the plurality of channels to obtain a plurality of pre-mixed channels, each pre-mixed channel comprising audio data of a channel and audio data of at least one object; a core encoder (300) for core encoding core encoder input data; and a metadata compressor (400) for compressing the metadata related to the one or more of the plurality of audio objects, wherein the audio encoder is configured to operate in at least one mode of the group of two modes comprising a first mode, in which the core encoder is configured to encode the plurality of audio channels and the plurality of audio objects received by the input interface as core encoder input data, and a second mode, in which the core encoder (300) is configured for receiving, as the core encoder input data, the plurality of pre-mixed channels generated by the mixer (200).

89. 发明公开

EP3022735A1 AUDIO ENCODER, AUDIO DECODER, METHODS AND COMPUTER PROGRAM USING JOINTLY ENCODED RESIDUAL SIGNALS 有权
标题翻译： AUDIOCODIERER，AUDIODECODIERER，VERFAHREN UND COMPUTERPROGRAMM MIT GEMEINSAM CODIERTEN RESTSIGNALEN
公开(公告)号：EP3022735A1
公开(公告)日：2016-05-25
申请号：EP14739141.1
申请日：2014-07-11
申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.
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：用于基于编码表示提供至少四个带宽扩展信道信号的音频解码器被配置为基于第一下混合信号和第二降混信号的联合编码表示来提供第一下混信号和第二下混信号信号采用多通道解码。音频解码器被配置为使用多声道解码来基于第一下混合信号来提供至少第一音频声道信号和第二音频声道信号。音频解码器被配置为使用多声道解码来基于第二降混信号来提供至少第三音频声道信号和第四音频声道信号。音频解码器被配置为基于第一音频信道信号和第三音频信道信号来执行多信道带宽扩展，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基于第二音频信道信号和第四音频信道信号执行多信道带宽扩展，以获得第二带宽扩展信道信号和第四带宽扩展信道信号。音频编码器使用相关概念。

90. 发明授权

EP2791938B8 APPARATUS, METHOD AND COMPUTER PROGRAMM FOR AVOIDING CLIPPING ARTEFACTS 有权转让
标题翻译：设备，方法和计算机程序，以防止限幅缺陷
公开(公告)号：EP2791938B8
公开(公告)日：2016-05-04
申请号：EP12809223.6
申请日：2012-12-14
申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： HEUBERGER, Albert , EDLER, Bernd , RETTELBACH, Nikolaus , GEYERSBERGER, Stefan , HILPERT, Johannes
IPC分类号： G10L25/69 , G10L19/032
CPC分类号： G10L19/008 , G10L19/032 , G10L25/69
摘要： An audio encoding apparatus includes an encoder for encoding a time segment of an input audio signal to be encoded to obtain a corresponding encoded signal segment. The audio encoding apparatus further includes a decoder for decoding the encoded signal segment to obtain a re-decoded signal segment. A clipping detector is provided for analyzing the re-decoded signal segment with respect to at least one of an actual signal clipping or an perceptible signal clipping and for generating a corresponding clipping alert. The encoder is further configured to again encode the time segment of the audio signal with at least one modified encoding parameter resulting in a reduced clipping probability in response to the clipping alert.

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