公开(公告)号：EP2883226B1

公开(公告)日：2016-08-03

申请号：EP13732189.9

申请日：2013-06-28

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

发明人： KASTNER, Thorsten ,  HERRE, Jürgen ,  TERENTIV, Leon ,  HELLMUTH, Oliver ,  PAULUS, Jouni ,  RIDDERBUSCH, Falko

IPC分类号： G10L19/008 ,  G10L19/16

CPC分类号： G10L19/008 ,  G10L19/173 ,  H04S2420/03

公开(公告)号：EP2904610A1

公开(公告)日：2015-08-12

申请号：EP13776987.3

申请日：2013-10-02

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

发明人： DISCH, Sascha ,  PAULUS, Jouni ,  EDLER, Bernd ,  HELLMUTH, Oliver ,  HERRE, Jürgen ,  KASTNER, Thorsten

IPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/025 ,  G10L19/20

CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/025 ,  G10L19/20

摘要： A decoder for generating an audio output signal comprising one or more audio output channels from a downmix signal is provided. The downmix signal encodes one or more audio object signals. The decoder comprises a control unit (181) for setting an activation indication to an activation state depending on a signal property of at least one of the one or more audio object signals. Moreover, the decoder comprises a first analysis module (182) for transforming the downmix signal to obtain a first transformed downmix comprising a plurality of first subband channels. Furthermore, the decoder comprises a second analysis module (183) for generating, when the activation indication is set to the activation state, a second transformed downmix by transforming at least one of the first subband channels to obtain a plurality of second subband channels, wherein the second transformed downmix comprises the first subband channels which have not been transformed by the second analysis module and the second subband channels. Moreover, the decoder comprises an un-mixing unit (184), wherein the un-mixing unit (184) is configured to un-mix the second transformed downmix, when the activation indication is set to the activation state, based on parametric side information on the one or more audio object signals to obtain the audio output signal, and to un-mix the first transformed downmix, when the activation indication is not set to the activation state, based on the parametric side information on the one or more audio object signals to obtain the audio output signal. Furthermore, an encoder is provided.

摘要翻译： 提供一种解码器，用于从包括多个时域下混样本的下混信号产生包括一个或多个音频输出通道的音频输出信号。 降混信号编码两个或更多个音频对象信号。 解码器包括用于确定多个分析窗口的窗口序列发生器（134），其中每个分析窗口包括下混合信号的多个时域下混样本。 多个分析窗口的每个分析窗口具有指示所述分析窗口的时域下混样本数的窗口长度。 窗口序列生成器（134）被配置为确定多个分析窗口，使得每个分析窗口的窗口长度取决于两个或更多个音频对象信号中的至少一个的信号属性。 此外，解码器包括在/ f分析模块（135），用于根据窗口长度将多个分析窗口中的每个分析窗口的多个时域下混样本从时域变换到时间 - 频域 的分析窗口，以获得一个转换的下混。 此外，解码器包括用于基于关于两个或更多个音频对象信号的参数侧信息解混合变换的下混合以获得音频输出信号的解混合单元（136）。 此外，提供了一种编码器。

公开(公告)号：EP2880654A2

公开(公告)日：2015-06-10

申请号：EP13759676.3

申请日：2013-08-05

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

发明人： KASTNER, Thorsten ,  HERRE, Jürgen ,  TERENTIV, Leon ,  HELLMUTH, Oliver

IPC分类号： G10L19/008

CPC分类号： G10L19/008 ,  G10L13/07 ,  H04S1/002

摘要： A decoder for generating an audio output signal having one or more audio output channels from a downmix signal having one or more downmix channels is provided. The downmix signal encodes one or more audio object signals. The decoder has a threshold determiner for determining a threshold value depending on a signal energy and/or a noise energy of at least one of the of or more audio object signals and/or depending on a signal energy and/or a noise energy of at least one of the one or more downmix channels. Moreover, the decoder has a processing unit for generating the one or more audio output channels from the one or more downmix channels depending on the threshold value.

摘要翻译： 提供了一种用于从具有一个或多个下混通道的下混信号产生具有一个或多个音频输出通道的音频输出信号的解码器。 降混信号对一个或多个音频对象信号进行编码。 解码器具有用于根据信号能量和/或至少一个或多个音频对象信号的噪声能量和/或根据信号能量和/或噪声能量来确定阈值的阈值确定器 一个或多个下混通道中的至少一个。 此外，解码器具有处理单元，用于根据阈值从一个或多个下混通道产生一个或多个音频输出通道。

公开(公告)号：EP2425427B1

公开(公告)日：2014-09-10

申请号：EP10716830.4

申请日：2010-04-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

发明人： HERRE, Jürgen ,  HOELZER, Andreas ,  TERENTIEV, Leonid ,  KASTNER, Thorsten ,  FALCH, Cornelia ,  PURNHAGEN, Heiko ,  ENGDEGARD, Jonas ,  RIDDERBUSCH, Falco

IPC分类号： G10L19/008 ,  G10L19/20

CPC分类号： G10L19/008 ,  G10L19/20

摘要： An audio signal encoder (600) for providing a downmix signal representation (614) and an object-related parametric information (616) on the basis of a plurality of object signals (x 1 to x N ) comprises a downmixer (620) configured to provide one or more downmix signals in dependence on downmix coefficients (d 1 to d N ) associated with the object signals (x 1 to x N ), such that the one or more downmix signals comprise a superposition of a plurality of object signals, and a side information provider (630) configured to provide an inter-object-relationship side information (OLD, IOC) describing level differences and correlation characteristics of object signals (x 1 to x N ) and an individual-object side information describing one or more individual properties of the individual object signals (x 1 to x N ).

公开(公告)号：EP2038878A1

公开(公告)日：2009-03-25

申请号：EP07724528.0

申请日：2007-04-24

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

发明人： HILPERT, Johannes ,  HERRE, Juergen ,  LINZMEIER, Karsten ,  HELLMUTH, Oliver ,  KASTNER, Thorsten

IPC分类号： G10L19/00 ,  H04N7/15

CPC分类号： H04N7/15 ,  G10L19/008

摘要： According to the present invention, multiple parametrically encoded audio signals can be efficiently combined using an audio signal generator (100), which generates an audio output signal (120) by combining the down-mix channels (110a, 112a) and the associated parameters (110b, 112b) of the audio signals directly within the parameter domain, i.e. without reconstructing or decoding the individual input audio signals prior to the generation of the audio output signal (120). This is achieved by direct mixing of the associated down-mix channels (110a, 112a) of the individual input signals. It is one key feature of the present invention that the combination of the down-mix channels (110a, 112a) is achieved by simple, computationally inexpensive arithmetic operations.

公开(公告)号：EP2425427A1

公开(公告)日：2012-03-07

申请号：EP10716830.4

申请日：2010-04-28

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB ,  Friedrich-Alexander-Universität Erlangen-Nürnberg

发明人： HERRE, Jürgen ,  HOELZER, Andreas ,  TERENTIEV, Leonid ,  KASTNER, Thorsten ,  FALCH, Cornelia ,  PURNHAGEN, Heiko ,  ENGDEGARD, Jonas ,  RIDDERBUSCH, Falco

IPC分类号： G10L19/00 ,  G10L19/14

CPC分类号： G10L19/008 ,  G10L19/20

摘要： An audio signal encoder (600) for providing a downmix signal representation (614) and an object-related parametric information (616) on the basis of a plurality of object signals (x 1 to x N ) comprises a downmixer (620) configured to provide one or more downmix signals in dependence on downmix coefficients (d 1 to d N ) associated with the object signals (x 1 to x N ), such that the one or more downmix signals comprise a superposition of a plurality of object signals, and a side information provider (630) configured to provide an inter-object-relationship side information (OLD, IOC) describing level differences and correlation characteristics of object signals (x 1 to x N ) and an individual-object side information describing one or more individual properties of the individual object signals (x 1 to x N ).

摘要翻译： 用于提供下混信号表示（614）和音频信号编码器（600）对象有关的对象信号（X 1至X N）的多个的基础上的参数信息（616）包括被配置成一个下混频器（620） 在与所述对象信号（X 1至X N）相关联的缩混系数（D 1至D N）的依赖性提供一个或多个下混合信号，审查没有所述一个或多个下混合信号包括对象信号的多个叠加，并 配置一个辅助信息提供者（630），以提供到对象间关系的辅助信息（OLD，IOC）描述电平差和对象信号（X 1至X N）的相关特性，以及单个对象侧信息描述的一个或多个 各个对象信号的个人属性（x 1至x N）。

公开(公告)号：EP2880653B1

公开(公告)日：2017-11-01

申请号：EP13745103.5

申请日：2013-08-05

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

发明人： KASTNER, Thorsten ,  HERRE, Jürgen ,  TERENTIV, Leon ,  HELLMUTH, Oliver

IPC分类号： G10L19/008

CPC分类号： G10L19/008 ,  H04S2400/03

公开(公告)号：EP2904611A1

公开(公告)日：2015-08-12

申请号：EP13774118.7

申请日：2013-10-02

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

发明人： DISCH, Sascha ,  PAULUS, Jouni ,  EDLER, Bernd ,  HELLMUTH, Oliver ,  HERRE, Jürgen ,  KASTNER, Thorsten

IPC分类号： G10L19/025 ,  G10L19/008

CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/025 ,  G10L19/20

摘要： A decoder for generating an audio output signal comprising one or more audio output channels from a downmix signal comprising a plurality of time-domain downmix samples is provided. The downmix signal encodes two or more audio object signals. The decoder comprises a window-sequence generator (134) for determining a plurality of analysis windows, wherein each of the analysis windows comprises a plurality of time-domain downmix samples of the downmix signal. Each analysis window of the plurality of analysis windows has a window length indicating the number of the time-domain downmix samples of said analysis window. The window-sequence generator (134) is configured to determine the plurality of analysis windows so that the window length of each of the analysis windows depends on a signal property of at least one of the two or more audio object signals. Moreover, the decoder comprises a t/f-analysis module (135) for transforming the plurality of time-domain downmix samples of each analysis window of the plurality of analysis windows from a time-domain to a time-frequency domain depending on the window length of said analysis window, to obtain a transformed downmix. Furthermore, the decoder comprises an un-mixing unit (136) for un-mixing the transformed downmix based on parametric side information on the two or more audio object signals to obtain the audio output signal. Moreover, an encoder is provided.

摘要翻译： 提供了一种用于在包括一个或从下混信号包括时域混样品的多元性多个音频输出声道生成音频输出信号的解码器。 缩混信号编码两个或多个音频对象信号。 解码器用于确定性采矿包括窗口序列产生器（134）的分析窗口复数，worin每个分析窗口的包括缩混信号的时域混样品的多元性。 的分析窗，所述多个每个分析窗口具有窗口长度指示所述分析窗口的时域混的样本的数目。 窗口序列产生器（134）被配置为确定矿分析窗口多元性所以没有每个分析窗口的窗口长度取决于两个或更多个音频对象信号中的至少一个的信号特性。 更上方，所述解码器包括在/ F-分析模块（135），用于将的分析窗口，所述多个每个分析窗口的时域混样品的多元性从时域变换到时频域取决于窗口长度 所述分析窗口，以获得转化的缩混。 进一步，对于未混合单元（136）的解码器包括未混合的转化缩混基于关于两个或更多个音频对象信号，以获得所述音频输出信号参数侧信息。 更过，在编码器提供。

公开(公告)号：EP2883226A1

公开(公告)日：2015-06-17

申请号：EP13732189.9

申请日：2013-06-28

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

发明人： KASTNER, Thorsten ,  HERRE, Jürgen ,  TERENTIV, Leon ,  HELLMUTH, Oliver ,  PAULUS, Jouni ,  RIDDERBUSCH, Falko

IPC分类号： G10L19/008 ,  G10L19/16

CPC分类号： G10L19/008 ,  G10L19/173 ,  H04S2420/03

摘要： An apparatus for adapting input audio information, encoding one or more audio objects, to obtain adapted audio information is provided. The input audio information comprises two or more input audio downmix channels and further comprises input parametric side information. The adapted audio information comprises one or more adapted audio downmix channels and further comprises adapted parametric side information. The apparatus comprises a downmix signal modifier (110) for adapting, depending on adaptation information, the two or more input audio downmix channels to obtain the one or more adapted audio downmix channels. Moreover, the apparatus comprises a parametric side information adapter (120) for adapting, depending on the adaptation information, the input parametric side information to obtain the adapted parametric side information.

公开(公告)号：EP2038878B1

公开(公告)日：2012-01-18

申请号：EP07724528.0

申请日：2007-04-24

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

发明人： HILPERT, Johannes ,  HERRE, Juergen ,  LINZMEIER, Karsten ,  HELLMUTH, Oliver ,  KASTNER, Thorsten

IPC分类号： G10L19/00 ,  H04N7/15

CPC分类号： H04N7/15 ,  G10L19/008

摘要： According to the present invention, multiple parametrically encoded audio signals can be efficiently combined using an audio signal generator (100), which generates an audio output signal (120) by combining the down-mix channels (110a, 112a) and the associated parameters (110b, 112b) of the audio signals directly within the parameter domain, i.e. without reconstructing or decoding the individual input audio signals prior to the generation of the audio output signal (120). This is achieved by direct mixing of the associated down-mix channels (110a, 112a) of the individual input signals. It is one key feature of the present invention that the combination of the down-mix channels (110a, 112a) is achieved by simple, computationally inexpensive arithmetic operations.