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1. 发明授权

EP1964111B1 DEVICE AND METHOD FOR POSTPROCESSING SPECTRAL VALUES AND ENCODER AND DECODER FOR AUDIO SIGNALS 有权
标题翻译： DEVICE AND METHOD FOR后处理和频谱编码器解码器单元和用于音频信号
公开(公告)号：EP1964111B1
公开(公告)日：2010-11-24
申请号：EP07818557.6
申请日：2007-09-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： EDLER, Bernd , GEIGER, Ralf , ERTEL, Christian , HILPERT, Johannes , POPP, Harald
IPC分类号： G10L19/14
CPC分类号： G10L19/26 , G10L19/0017 , G10L19/24 , G10L19/265
摘要： For postprocessing spectral values which are based on a first transformation algorithm for converting the audio signal into a spectral representation, first a sequence of blocks of the spectral values representing a sequence of blocks of samples of the audio signal are provided. Hereupon, a weighted addition of spectral values of the sequence of blocks of spectral values is performed in order to obtain a sequence of blocks of postprocessed spectral values, wherein the combination is performed such that for calculating a postprocessed spectral value for a frequency band and a time duration a spectral value of the sequence of blocks for the frequency band and the time duration and a spectral value for another frequency band or another time duration are used, wherein the combination is further performed such that such weighting factors are used that the postprocessed spectral values are an approximation to the spectral values as they are obtained by converting the audio signal into a spectral representation using a second transformation algorithm which is different from the first transformation algorithm. The postprocessed spectral values are in particular used for a difference formation within a scalable encoder or for an addition within a scalable decoder, respectively.

2. 发明公开

EP3506260A1 APPARATUS AND METHOD FOR DECODING OR ENCODING AN AUDIO SIGNAL USING ENERGY INFORMATION VALUES FOR A RECONSTRUCTION BAND 有权转让
公开(公告)号：EP3506260A1
公开(公告)日：2019-07-03
申请号：EP19157850.9
申请日：2014-07-15
申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.
发明人： NIEDERMEIER, Andreas , ERTEL, Christian , GEIGER, Ralf , GHIDO, Florin , HELMRICH, Christian
IPC分类号： G10L19/028
摘要： An apparatus for decoding an encoded audio signal comprising an encoded representation of a first set of first spectral portions and an encoded representation of parametric data indicating spectral energies for a second set of second spectral portions, comprises: an audio decoder (900) for decoding the encoded representation (901b) of the first set of the first spectral portions to obtain a first set of first spectral portions (904) and for decoding the encoded representation of the parametric data to obtain a decoded parametric data (902) for the second set of second spectral portions indicating, for individual reconstruction bands, individual energies; a frequency regenerator (906) for reconstructing spectral values in a reconstruction band (920) comprising a second spectral portion (922, 923) using a first spectral portion of the first set of the first spectral portions and an individual energy for the reconstruction band, the reconstruction band comprising a first spectral portion (921) and the second spectral portion; wherein the frequency regenerator (906) is configured for determining (912) a survive energy information comprising an accumulated energy of the first spectral portion having frequency values in the reconstruction band, determining (918) a tile energy information of further spectral portions (922, 923) of the reconstruction band (920) for frequency values different from the first spectral portion (921) having frequencies in the reconstruction band (920), wherein the further spectral portions (922, 923) are to be generated by frequency regeneration using a first spectral portion (302) different from the first spectral portion (921, 306) in the reconstruction band; determining (914) a missing energy in the reconstruction band (920) using the individual energy for the reconstruction band and the survive energy information; and adjusting (916) the further spectral portions in the reconstruction band based on the missing energy information and the tile energy information.

3. 发明授权

EP3025521B1 RENDERER CONTROLLED SPATIAL UPMIX 有权
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
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 , G10L19/008

4. 发明公开

EP3022734A1 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
标题翻译：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
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。

5. 发明公开

EP4246512A2 APPARATUS AND METHOD FOR DECODING OR ENCODING AN AUDIO SIGNAL USING ENERGY INFORMATION VALUES FOR A RECONSTRUCTION BAND 审中-实审
公开(公告)号：EP4246512A2
公开(公告)日：2023-09-20
申请号：EP23188679.7
申请日：2014-07-15
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： NIEDERMEIER, Andreas , ERTEL, Christian , GEIGER, Ralf , GHIDO, Florin , HELMRICH, Christian
IPC分类号： G10L19/02
摘要： An apparatus for decoding an encoded audio signal comprising an encoded representation of a first set of first spectral portions and an encoded representation of parametric data indicating spectral energies for a second set of second spectral portions, comprises: an audio decoder (900) for decoding the encoded representation (901b) of the first set of the first spectral portions to obtain a first set of first spectral portions (904) and for decoding the encoded representation of the parametric data to obtain a decoded parametric data (902) for the second set of second spectral portions indicating, for individual reconstruction bands, individual energies; a frequency regenerator (906) for reconstructing spectral values in a reconstruction band (920) comprising a second spectral portion (922, 923) using a first spectral portion of the first set of the first spectral portions and an individual energy for the reconstruction band, the reconstruction band comprising a first spectral portion (921) and the second spectral portion; wherein the frequency regenerator (906) is configured for determining (912) a survive energy information comprising an accumulated energy of the first spectral portion having frequency values in the reconstruction band, determining (918) a tile energy information of further spectral portions (922, 923) of the reconstruction band (920) for frequency values different from the first spectral portion (921) having frequencies in the reconstruction band (920), wherein the further spectral portions (922, 923) are to be generated by frequency regeneration using a first spectral portion (302) different from the first spectral portion (921, 306) in the reconstruction band; determining (914) a missing energy in the reconstruction band (920) using the individual energy for the reconstruction band and the survive energy information; and adjusting (916) the further spectral portions in the reconstruction band based on the missing energy information and the tile energy information.

6. 发明公开

EP3618460A1 APPARATUS AND METHOD FOR GENERATING A PLURALITY OF AUDIO CHANNELS 有权转让
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.

7. 发明授权

EP3022735B1 AUDIO ENCODER, AUDIO DECODER, METHODS AND COMPUTER PROGRAM USING JOINTLY ENCODED RESIDUAL SIGNALS 有权
标题翻译：音频编码器，音频解码器，方法和计算机程序使用联合编码的残留信号
公开(公告)号：EP3022735B1
公开(公告)日：2017-09-06
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 , G10L19/00
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缩混信号和第二缩混信号的联合编码表示来提供第一缩混信号和第二缩混信号信号使用多通道解码。音频解码器被配置为使用多声道解码基于第一缩混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来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的概念。

8. 发明公开

EP3025340A1 APPARATUS AND METHOD FOR DECODING OR ENCODING AN AUDIO SIGNAL USING ENERGY INFORMATION VALUES FOR A RECONSTRUCTION BAND 有权
标题翻译：对于能源信息编码解码和音频信号的装置和方法值重建BAND
公开(公告)号：EP3025340A1
公开(公告)日：2016-06-01
申请号：EP14738854.0
申请日：2014-07-15
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： NIEDERMEIER, Andreas , ERTEL, Christian , GEIGER, Ralf , GHIDO, Florin , HELMRICH, Christian
IPC分类号： G10L19/028
CPC分类号： G10L19/008 , G10L19/02 , G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L19/022 , G10L19/025 , G10L19/03 , G10L19/032 , G10L19/06 , G10L21/0388 , G10L25/06 , H04S1/007
摘要： Apparatus for decoding an encoded audio signal comprising an encoded core signal (1), comprising: a core decoder (1400) for decoding the encoded core signal (1401) to obtain a decoded core signal; a tile generator (1404) for generating one or more spectral tiles having frequencies not included in the decoded core signal using a spectral portion of the decoded core signal; and a cross-over filter (1406) for spectrally cross-over filtering the decoded core signal and a first frequency tile having frequencies extending from a gap filling frequency (309) to an upper border frequency or for spectrally cross-over filtering a first frequency tile and a second frequency tile.

9. 发明公开

EP3025332A1 APPARATUS AND METHOD FOR LOW DELAY OBJECT METADATA CODING 审中-公开
标题翻译：用于低延迟目标元数据编码的装置和方法
公开(公告)号：EP3025332A1
公开(公告)日：2016-06-01
申请号：EP14741575.6
申请日：2014-07-16
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： BORSS, Christian , ERTEL, Christian , HILPERT, Johannes
IPC分类号： G10L19/008
CPC分类号： H04S5/005 , G10L19/008 , H04S3/008 , H04S3/02 , H04S2400/03 , H04S2400/11 , H04S2420/03
摘要： An apparatus (100) for generating one or more audio channels is provided. The apparatus (100) comprises a metadata decoder (110) for receiving one or more compressed metadata signals. Each of the one or more compressed metadata signals comprises a plurality of first metadata samples. The first metadata samples of each of the one or more compressed metadata signals indicate information associated with an audio object signal of one or more audio object signals. The metadata decoder (110) is configured to generate one or more reconstructed metadata signals, so that each of the one or more reconstructed metadata signals comprises the first metadata samples of one of the one or more compressed metadata signals and further comprises a plurality of second metadata samples. Moreover, the metadata decoder (110) is configured to generate each of the second metadata samples of each reconstructed metadata signal of the one or more reconstructed metadata signals depending on at least two of the first metadata samples of said reconstructed metadata signal. Moreover, the apparatus (100) comprises an audio channel generator (120) for generating the one or more audio channels depending on the one or more audio object signals and depending on the one or more reconstructed metadata signals. Furthermore, an apparatus for generating encoded audio information comprising one or more encoded audio signals and one or more compressed metadata signals is provided.
摘要翻译：提供了一种用于生成一个或多个音频频道的设备（100）。该设备包括元数据解码器（110），用于根据一个或多个处理后的元数据信号（z 1，...，z N）来生成一个或多个重构元数据信号（x 1'，...，x N'）控制信号（b），其中所述一个或多个重构的元数据信号（x 1'，...，x N'）中的每一个指示与一个或多个音频对象信号的音频对象信号相关联的信息，其中所述元数据解码器 110）被配置为通过确定多个重构的元数据样本（x 1'（n），...，x N'（（x 1'，...，x N'））来生成所述一个或多个重构的元数据信号（x 1'x N'））中的每一个重构元数据信号。此外，该设备包括音频声道生成器（120），用于根据一个或多个音频对象信号并根据一个或多个重建的元数据信号（X 1'，...，X N）生成一个或多个音频声道 “）。所述元数据解码器（110）被配置为接收所述一个或多个经处理的元数据信号（z 1，...，n 1）中的每一个的经处理的元数据样本（z 1（n），...，z N（n），z N）。此外，元数据解码器（110）被配置为接收控制信号（b）。此外，元数据解码器（110）被配置为确定多个重构的元数据样本（X i'（1），... X i'（n-1））中的每个重构的元数据样本（x 1'，...，x N'）的每个重构的元数据信号（x i'）的X i'（n）），从而当控制信号（b）指示第一状态（b（n）= 0），所述重构的元数据样本（X i'（n））是所处理的一个或多个处理后的元数据样本之一元数据信号（zi）以及所述重构的元数据信号（X i'）的另一个已经产生的重构的元数据样本（X i'（n-1）），并且使得当控制信号指示第二状态（b（n （zi，（1），...，zi）的所述一个（zi，（n））与所述第一状态不同的情况下，所述重建的元数据样本（Z i）的所述一个或多个经处理的元数据信号（z 1，...，z N）的所述一个（Z）此外，提供了一种用于生成编码的音频信息的设备（250）。

10. 发明公开

EP4351173A3 APPARATUS AND METHOD FOR GENERATING A PLURALITY OF AUDIO CHANNELS 审中-实审
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.

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