公开(公告)号：EP4148729A1

公开(公告)日：2023-03-15

申请号：EP22203358.1

申请日：2011-03-04

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

发明人： Villemoes, Lars ,  Ekstrand, Per ,  Disch, Sascha ,  Nagel, Frederik ,  Wilde, Stephan

IPC分类号： G10L19/02 ,  G10L21/04 ,  G10L21/038

摘要： An apparatus for downsampling an audio signal comprise a first filter bank (102, 601, 2302) for generating a plurality of subband signals from the audio signal, wherein a sampling rate of the subband signals is smaller than a sampling rate of the audio signal; at least one synthesis filter bank (602-2, 2304) followed by an analysis filter bank (603-2, 2307) for performing a sample rate conversion to obtain a sample rate converted signal, the synthesis filter bank (602-2) having a number of channels different from a number of channels of the analysis filter bank (603-2); a time stretch processor (604-2, 2309) for processing the sample rate converted signal to obtain a time stretched signal; and a combiner (605, 2311) for combining the time stretched signal and a low-band signal or a different time stretched signal.

公开(公告)号：EP2296145B1

公开(公告)日：2019-05-22

申请号：EP10194086.4

申请日：2009-02-17

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

发明人： Disch, Sascha ,  Nagel, Frederik ,  Rettelbach, Nikolaus ,  Multrus, Markus ,  Fuchs, Guillaume

IPC分类号： G10L21/04

公开(公告)号：EP2830056A1

公开(公告)日：2015-01-28

申请号：EP13189362.0

申请日：2013-10-18

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Friedrich - Alexander - Universität Erlangen - Nuernberg

发明人： Bayer, Stefan ,  Disch, Sascha ,  Edler, Bernd ,  Geiger, Ralf ,  Helmrich, Christian ,  Nagel, Frederik ,  Neukam, Christian ,  Schmidt, Konstantin ,  Thoshkahna, Balaji Nagendran

IPC分类号： G10L19/02 ,  G10L21/038

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： An apparatus for decoding an encoded audio signal, comprises a spectral domain audio decoder (112) for generating a first decoded representation of a first set of first spectral portions, the decoded representation having a first spectral resolution; a parametric decoder (114) for generating a second decoded representation of a second set of second spectral portions having a second spectral resolution being lower than the first spectral resolution; a frequency regenerator (116) for regenerating every constructed second spectral portion having the first spectral resolution using a first spectral portion and spectral envelope information for the second spectral portion; and a spectrum time converter (118) for converting the first decoded representation and the reconstructed second spectral portion into a time representation.

摘要翻译： 用于编码音频信号的解码的设备，包括用于生成第一组第一光谱部分中的第一解码的表示频谱域音频解码器（112），具有第一光谱分辨率解码的表示; 一个参数解码器（114），用于产生第二组具有第二光谱分辨率比所述第一光谱分辨率较低的第二光谱部分的第二解码表示; 一种用于使用第一光谱部分和用于第二光谱部分的频谱包络信息的第一光谱分辨率每构建第二频谱部分再生的频率再生器（116）; 和频谱时间转换器（118），用于所述第一解码表示和重建的第二频谱部分转换为时间表示。

公开(公告)号：EP2631906A1

公开(公告)日：2013-08-28

申请号：EP12178265.0

申请日：2012-07-27

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

发明人： Disch, Sascha ,  Herre, Jürgen ,  Edler, Bernd ,  Nagel, Frederik

IPC分类号： G10L21/003 ,  G10L19/02 ,  G10L19/00

CPC分类号： G10L19/02 ,  G10L19/0204 ,  G10L19/26

摘要： A decoder for decoding an encoded audio signal to obtain a phase-adjusted audio signal is provided. The decoder comprises a decoding unit (110) and a phase adjustment unit (120). The decoding unit (110) is adapted to decode the encoded audio signal to obtain a decoded audio signal. The phase adjustment unit (120) is adapted to adjust the decoded audio signal to obtain the phase-adjusted audio signal. The phase adjustment unit (120) is configured to receive control information depending on a vertical phase coherence of the encoded audio signal. Moreover, the phase adjustment unit (120) is adapted to adjust the decoded audio signal based on the control information.

摘要翻译： 提供了一种用于解码编码音频信号以获得相位调整音频信号的解码器。 解码器包括解码单元（110）和相位调整单元（120）。 解码单元（110）适于对编码的音频信号进行解码以获得解码的音频信号。 相位调整单元（120）适于调整解码的音频信号以获得相位调整的音频信号。 相位调整单元（120）被配置为根据编码的音频信号的垂直相位相干接收控制信息。 此外，相位调整单元120适于基于控制信息调整解码音频信号。

公开(公告)号：EP2273493B1

公开(公告)日：2012-12-19

申请号：EP10153530.0

申请日：2010-02-12

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

发明人： Nagel, Frederik ,  Multrus, Markus ,  Disch, Sascha ,  Lecomte, Jeremie ,  Ertel, Christian ,  Warmbold, Patrick

IPC分类号： G10L19/02 ,  G10L19/14 ,  G10L21/02 ,  G10L21/04

CPC分类号： G10L21/038 ,  G10L19/0208 ,  G10L19/022 ,  G10L19/20 ,  G10L19/24 ,  G10L21/04

公开(公告)号：EP2352147A3

公开(公告)日：2012-05-30

申请号：EP11162255.1

申请日：2009-06-23

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

发明人： Neuendorf, Max ,  Krämer, Ulrich ,  Grill, Bernhard ,  Multrus, Markus ,  Popp, Harald ,  Rettelbach, Nikolaus ,  Nagel, Frederik ,  Lohwasser, Markus ,  Gayer, Marc ,  Jander, Manuel ,  Bacigalupo, Virgilio

IPC分类号： G10L19/14 ,  G10L21/02

CPC分类号： G10L21/038 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/20 ,  G10L21/04

摘要： An apparatus for decoding (100) an encoded audio signal (102), the encoded audio signal (102) comprising a first portion (104a) encoded in accordance with a first encoding algorithm, a second portion (104b) encoded in accordance with a second encoding algorithm, BWE parameters (106) for the first portion (104a) and the second portion (104b) and a coding mode information (108) indicating a first decoding algorithm or a second decoding algorithm, comprises a first decoder (110a), a second decoder (110b), a BWE module (130) and a controller (140). The first decoder (110a) decodes the first portion (104a) in accordance with the first decoding algorithm for a first time portion of the encoded signal (102) to obtain a first decoded signal (114a). The second decoder (110b) decodes the second portion (104b) in accordance with the second decoding algorithm for a second time portion of the encoded signal (102) to obtain a second decoded signal (114b). The BWE module (130) has a controllable crossover frequency (fx) and is configured for performing a bandwidth extension algorithm using the first decoded signal (114a) and the BWE parameters (106) for the first portion (104b), and for performing a bandwidth extension algorithm using the second decoded signal (114b) and the bandwidth extension parameter (106) for the second portion (104b). The controller (140) controls the crossover frequency (fx) for the BWE module (130) in accordance with the coding mode information (108).

公开(公告)号：EP2296145A2

公开(公告)日：2011-03-16

申请号：EP10194086.4

申请日：2009-02-17

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

发明人： Disch, Sascha ,  Nagel, Frederik ,  Rettelbach, Nikolaus ,  Multrus, Markus ,  Fuchs, Guillaume

IPC分类号： G10L21/04

CPC分类号： G10L21/04 ,  G10L19/025

摘要： A signal manipulator for manipulating an audio signal having a transient event may comprise a transient remover (100), a signal processor (110) and a signal inserter (120) for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by said transient remover, so that a manipulated audio signal comprises a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor (110), which would destroy the vertical coherence of a transient.

摘要翻译： 用于音频信号的操纵具有瞬变事件可以包括瞬态消除（100），信号处理器（110）和信号插入器（120），用于在信号位置处插入一个处理的音频信号的时间部分的信号操纵器，其中 由所述瞬态消除处理之前可以除去，所以没有被操纵的音频信号的瞬态事件包括没有被处理，由此，瞬态事件的垂直相干被维持，而不是在信号处理器执行的任何处理（110）的影响的瞬变事件 这将破坏一个短暂的垂直连贯性。

公开(公告)号：EP2293294A2

公开(公告)日：2011-03-09

申请号：EP10194088.0

申请日：2009-02-17

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

发明人： Multrus, Markus ,  Disch, Sascha ,  Nagel, Frederik ,  Rettelbach, Nikolaus ,  Fuchs, Guillaume

IPC分类号： G10L21/00

CPC分类号： G10L21/04 ,  G10L19/025

摘要： A signal manipulator for manipulating an audio signal having a transient event may comprise a transient remover (100), a signal processor (110) and a signal inserter (120) for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by said transient remover, so that a manipulated audio signal comprises a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor (110), which would destroy the vertical coherence of a transient.

摘要翻译： 用于音频信号的操纵具有瞬变事件可以包括瞬态消除（100），信号处理器（110）和信号插入器（120），用于在信号位置处插入一个处理的音频信号的时间部分的信号操纵器，其中 由所述瞬态消除处理之前可以除去，所以没有被操纵的音频信号的瞬态事件包括没有被处理，由此，瞬态事件的垂直相干被维持，而不是在信号处理器执行的任何处理（110）的影响的瞬变事件 这将破坏一个短暂的垂直连贯性。

公开(公告)号：EP2214164A3

公开(公告)日：2011-01-26

申请号：EP10152001.3

申请日：2010-01-28

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

发明人： Neuendorf, Max ,  Lecomte, Jérémie ,  Multrus, Markus ,  Bayer, Stefan ,  Nagel, Frederik ,  Fuchs, Guillaume ,  Robilliard, Julien ,  Rettelbach, Nikolaus ,  Geiger, Ralf ,  Grill, Bernhard

IPC分类号： G10L19/02 ,  G10L19/14

CPC分类号： G10L19/022 ,  G10L19/20

摘要： An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

摘要翻译： 用于提供所述音频内容的编码表示的基础上的音频内容的解码的表示音频解码器包括被配置为一组的基础上，提供一个音频帧的时域表示的线性预测域解码器芯 与音频帧，并配置成提供一组频域参数的基础上，一个音频帧的时域表示的频域解码器核相关联的线性预测域参数，同时考虑到的变换窗出 一组包括不同变换窗口的多元性。 音频解码器包括被配置为重叠和相加的时域在不同的域中编码音频的后续帧的表示中，为了平滑的后续帧的时域表示之间的转换的信号组合器。 将该组变换窗口包括专门用于angepasst频域核心模式和线性预测域核心模式之间的转换的一个或多个窗口。

公开(公告)号：EP2144231A1

公开(公告)日：2010-01-13

申请号：EP09002272.4

申请日：2009-02-18

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

发明人： Grill, Bernhard ,  Bayer, Stefan ,  Fuchs, Guillaume ,  Geyersberger, Stefan ,  Geiger, Ralf ,  Hilpert, Johannes ,  Krämer, Ulrich ,  Lecomte, Jeremie ,  Multrus, Markus ,  Neuendorf, Max ,  Popp, Harald ,  Rettelbach, Nikolaus ,  Nagel, Frederik ,  Disch, Sascha ,  Herre, Jürgen ,  Yokotani, Yoshikazu ,  Wabnik, Stefan ,  Schuller, Gerald ,  Hirschfeld, Jens

IPC分类号： G10L19/14

CPC分类号： G10L19/173 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder comprises a common preprocessing stage, an information sink based encoding branch such as spectral domain encoding branch, a information source based encoding branch such as an LPC-domain encoding branch and a switch for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage. An audio decoder comprises a spectral domain decoding branch, an LPC-domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.

摘要翻译： 音频编码器包括公共预处理级，诸如频域编码分支的基于信息集合的编码分支，诸如LPC域编码分支的基于信息源的编码分支和用于在这些分支的输入处在这些分支之间切换的开关，或 这些分支的输出由决策阶段控制。 音频解码器包括频域解码分支，LPC域解码分支，用于在分支之间切换的一个或多个开关和用于后处理时域音频信号以用于获得后处理音频的公共后处理级 信号。