公开(公告)号：EP4243017A2

公开(公告)日：2023-09-13

申请号：EP23186418.2

申请日：2012-02-14

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

发明人： Ravelli, Emmanuel ,  Geiger, Ralf ,  Schnell, Markus ,  Fuchs, Guillaume ,  Ruoppila, Vesa ,  Bäckström, Tom ,  Grill, Bernhard ,  Helmrich, Christian

IPC分类号： G10L19/02

摘要： An apparatus for encoding an audio signal having a stream of audio samples 100 comprises: a windower 102 for applying a prediction coding analysis window 200 to the stream of audio samples to obtain windowed data for a prediction analysis and for applying a transform coding analysis window 204 to the stream of audio samples to obtain windowed data for a transform analysis, wherein the transform coding analysis window is associated with audio samples within a current frame of audio samples and with audio samples of a predefined portion of a future frame of audio samples being a transform-coding look-ahead portion 206, wherein the prediction coding analysis window is associated with at least the portion of the audio samples of the current frame and with audio samples of a predefined portion of the future frame being a prediction coding look-ahead portion 208, wherein the transform coding look-ahead portion 206 and the prediction coding look-ahead portion 208 are identically to each other or are different from each other by less than 20% of the prediction coding look-ahead portion 208 or less than 20% of the transform coding look-ahead portion 206; and an encoding processor 104 for generating prediction coded data for the current frame using the windowed data for the prediction analysis or for generating transform coded data for the current frame using the windowed data for the transform analysis.

公开(公告)号：EP3742444A1

公开(公告)日：2020-11-25

申请号：EP20176783.7

申请日：2014-07-15

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

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

IPC分类号： G10L21/0388 ,  G10L19/02

摘要： An apparatus for generating a decoded two-channel signal, comprises: an audio processor (802) for decoding an encoded two-channel signal to obtain a first set of first spectral portions; a parametric decoder (804) for providing parametric data for a second set of second spectral portions and a two-channel identification identifying either a first or a second different two-channel representation for the second spectral portions; and a frequency regenerator (806) for regenerating a second spectral portion depending on a first spectral portion of the first set of first spectral portions, the parametric data for the second portion and the two-channel identification for the second portion.

公开(公告)号：EP2109098B1

公开(公告)日：2020-09-09

申请号：EP09010010.8

申请日：2007-10-23

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

发明人： Schnell, Markus ,  Lutzky, Manfred ,  Lohwasser, Markus ,  Schmidt, Markus ,  Gayer, Marc ,  Mellar, Michael ,  Edler, Bernd ,  Multrus, Markus ,  Schuller, Gerald ,  Geiger, Ralf ,  Grill, Bernhard

IPC分类号： G10L19/022 ,  H03H17/02 ,  G10L19/02 ,  G10L25/45 ,  G10L21/038

公开(公告)号：EP3503098A1

公开(公告)日：2019-06-26

申请号：EP19157006.8

申请日：2012-02-14

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

发明人： Ravelli, Emmanuel ,  Geiger, Ralf ,  Schnell, Markus ,  Fuchs, Guillaume ,  Ruoppila, Vesa ,  Bäckström, Tom ,  Grill, Bernhard ,  Helmrich, Christian

IPC分类号： G10L19/022 ,  G10L19/18

摘要： An audio decoder for decoding an encoded audio signal, comprises: a prediction parameter decoder (180) for performing a decoding of data for a prediction coded frame from the encoded audio signal; a transform parameter decoder (183) for performing a decoding of data for a transform coded frame from the encoded audio signal, wherein the transform parameter decoder (183) is configured for performing a spectral-time transform and for applying a synthesis window to transformed data to obtain data for the current frame and a future frame, the synthesis window having a first overlap portion, an adjacent second overlap portion and an adjacent third overlap portion (206), the third overlap portion being associated with audio samples for the future frame and the non-overlap portion (208) being associated with data of the current frame; and an overlap-adder (184) for overlapping and adding synthesis windowed samples associated with the third overlap portion of a synthesis window for the current frame and synthesis windowed samples associated with the first overlap portion of a synthesis window for the future frame to obtain a first portion of audio samples for the future frame, wherein a rest of the audio samples for the future frame are synthesis windowed samples associated with the second non-overlapping portion of the synthesis window for the future frame obtained without overlap-adding, when the current frame and the future frame comprise transform-coded data.

公开(公告)号：EP3471094A1

公开(公告)日：2019-04-17

申请号：EP18209545.5

申请日：2015-07-24

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

发明人： Disch, Sascha ,  Geiger, Ralf ,  Niedermeier, Andreas ,  Neusinger, Matthias ,  Schmidt, Konstantin ,  Wilde, Stephan ,  Schubert, Benjamin ,  Neukam, Christian

IPC分类号： G10L19/028 ,  G10L21/038

摘要： An apparatus for generating an enhanced signal from an input signal (600), wherein the enhanced signal has spectral values for an enhancement spectral region, the spectral values for the enhancement spectral regions not being contained in the input signal (600), comprises a mapper (602) for mapping a source spectral region of the input signal to a target region in the enhancement spectral region, the source spectral region comprising a noise-filling region (302); and a noise filler (604) configured for generating first noise values for the noise-filling region (302) in the source spectral region of the input signal and for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from the first noise values or for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from first noise values in the source region.

公开(公告)号：EP3288027A1

公开(公告)日：2018-02-28

申请号：EP17169583.6

申请日：2007-10-23

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

发明人： Schnell, Markus ,  Lutzky, Manfred ,  Lohwasser, Markus ,  Schmidt, Markus ,  Gayer, Marc ,  Mellar, Michael ,  Edler, Bernd ,  Multrus, Markus ,  Schuller, Gerald ,  Geiger, Ralf ,  Grill, Bernhard

IPC分类号： G10L19/022 ,  H03H17/02 ,  G10L19/02 ,  G10L25/45 ,  G10L21/038

CPC分类号： G10L19/0204 ,  G10L19/022 ,  G10L21/038 ,  G10L25/45 ,  H03H17/0266

摘要： An embodiment of an apparatus (100) for generating audio subband values in audio subband channels comprises an analysis windower (110) for windowing a frame (120) of time-domain audio input samples being in a time sequence extending from an early sample to a later sample using an analysis window function (190) comprising a sequence of window coefficients to obtain windowed samples. The analysis window function (190) comprises a first group (200) of window coefficients and a second group (210) of window coefficients. The first group (200) of window coefficients is used for windowing later time-domain samples and the second group (210) of window coefficients is used for windowing an earlier time-domain samples. The apparatus (100) further comprises a calculator (170) for calculating the audio subband values using the windowed samples.

摘要翻译： 用于在音频子带通道中生成音频子带值的设备（100）的实施例包括：分析加窗器（110），用于对时域音频输入采样的帧（120）进行加窗，所述时域音频输入采样的时间序列从早期采样延伸到 稍后使用包括窗系数序列的分析窗函数（190）来采样以获得加窗样本。 分析窗函数（190）包括窗系数的第一组（200）和窗系数的第二组（210）。 窗系数的第一组（200）被用于对后面的时域采样进行加窗，并且窗系数的第二组（210）被用于对早期的时域采样进行加窗。 该设备（100）还包括用于使用加窗样本来计算音频子带值的计算器（170）。

公开(公告)号：EP3133598A1

公开(公告)日：2017-02-22

申请号：EP16193357.7

申请日：2013-09-20

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

发明人： Disch, Sascha ,  Schubert, Benjamin ,  Geiger, Ralf ,  Edler, Bernd ,  Dietz, Martin

IPC分类号： G10L19/02 ,  G10L19/032

CPC分类号： G10L19/02 ,  G10L19/0212 ,  G10L19/032

摘要： An apparatus for generating a plurality of spectral patterns is provided. The apparatus comprises a signal generator (165) for generating a plurality of signals in a first domain, a signal transformation unit (175) for transforming each signal of the plurality of signals from the first domain to a second domain to obtain a plurality of spectral patterns, each pattern of the plurality of transformed spectral patterns comprising a plurality of coefficients, a postprocessing unit (185) for truncating the transformed spectral patterns by removing one or more of the coefficients of the transformed spectral patterns to obtain a plurality of processed patterns, and a storage unit (195) comprising a database or a memory, wherein the storage unit (195) is configured to store each processed pattern of the plurality of processed patterns in the database or the memory.

摘要翻译： 提供了一种用于产生多个光谱图案的装置。 该装置包括用于在第一域中产生多个信号的信号发生器（165），用于将来自第一域的多个信号的每个信号变换到第二域的信号变换单元（175）以获得多个频谱 所述多个变换的频谱图案的每个图案包括多个系数;后处理单元，用于通过去除所述经变换的频谱图案的系数中的一个或多个以获得多个处理的图案来截断所述变换的频谱图案， 以及包括数据库或存储器的存储单元（195），其中所述存储单元（195）被配置为将所述多个处理的模式的每个处理的模式存储在所述数据库或所述存储器中。

公开(公告)号：EP3096317A1

公开(公告)日：2016-11-23

申请号：EP16177667.9

申请日：2011-03-08

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

发明人： Helmrich, Christian ,  Geiger, Ralf

IPC分类号： G10L19/022 ,  G10L25/45 ,  G10L19/02

CPC分类号： H03M7/30 ,  G06F17/10 ,  G10L19/0212 ,  G10L19/022 ,  G10L25/45

摘要： A signal processor for providing a processed version of an input signal in dependence on the input signal comprises a windower configured to window a portion of the input signal, or of a pre-processed version thereof, in dependence on a signal processing window described by signal processing window values for a plurality of window value index values, in order to obtain the processed version of the input signal. The signal processor also comprises a window provider for providing the signal processing window values for a plurality of window value index values in dependence on one or more window shape parameters.

摘要翻译： 用于根据输入信号提供输入信号的经处理版本的信号处理器包括：配置成根据由信号描述的信号处理窗口来输入输入信号的一部分或其预处理版本的加窗器 处理多个窗口值索引值的窗口值，以便获得输入信号的处理版本。 信号处理器还包括窗口提供器，用于根据一个或多个窗口形状参数为多个窗口值索引值提供信号处理窗口值。

公开(公告)号：EP3067887A1

公开(公告)日：2016-09-14

申请号：EP15172599.1

申请日：2015-06-17

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

发明人： Disch, Sascha ,  Fuchs, Guillaume ,  Ravelli, Emmanuel ,  Neukam, Christian ,  Schmidt, Konstantin ,  Benndorf, Conrad ,  Niedermeier, Andreas ,  Schubert, Benjamin ,  Geiger, Ralf

IPC分类号： G10L19/008 ,  G10L19/04 ,  G10L19/02 ,  G10L21/038 ,  G10L19/18

CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/032 ,  G10L19/04 ,  G10L19/13 ,  G10L19/18 ,  G10L21/038

摘要： Audio encoder 2" for encoding a multichannel signal 4 is shown. The audio encoder comprises a downmixer 12 for downmixing the multichannel signal 4 to obtain a downmix signal 14, a linear prediction domain core encoder 16 for encoding the downmix signal 14, wherein the downmix signal 14 has a low band and a high band, wherein the linear prediction domain core encoder 16 is configured to apply a bandwidth extension processing for parametrically encoding the high band, a filterbank 82 for generating a spectral representation of the multichannel signal 4, and a joint multichannel encoder 18 configured to process the spectral representation comprising the low band and the high band of the multichannel signal to generate multichannel information 20.

摘要翻译： 被示出音频编码器2“用于编码的多通道信号4，音频编码器包括下混频器12，用于降混多声道信号4以获得降混信号14，用于编码所述降混信号14的线性预测域核心编码器16，worin缩混 信号14具有低频带和高频带，worin线性预测域核心编码器16被配置为应用带宽扩展处理以参数编码所述高频带，用于产生多声道信号4的频谱表示的滤波器组82和 联合多声道编码器18被配置为处理所述频谱表示包括低带和所述多信道信号的高频带，以产生多声道信息第二十

公开(公告)号：EP2830059A1

公开(公告)日：2015-01-28

申请号：EP13189374.5

申请日：2013-10-18

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

发明人： Ertel, Christian ,  Geiger, Ralf ,  Ghido, Florin ,  Helmrich, Christian ,  Niedermeier, Andreas

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： 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 (901 b) 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.

摘要翻译： 一种用于解码编码音频信号的装置，包括第一组第一光谱部分的编码表示和指示第二组第二光谱部分的光谱能量的参数数据的编码表示，包括：音频解码器（900），用于对 第一组第一频谱部分的编码表示（901b）以获得第一组第一频谱部分（904）并且用于解码参数数据的编码表示以获得用于第二组的解码参数数据（902） 第二光谱部分指示用于各个重建带的单个能量; 用于使用第一组光谱部分的第一组的第一光谱部分和用于重建频带的单个能量来重构包括第二光谱部分（922,923）的重建频带（920）中的频谱值的频率再生器（906） 所述重建频带包括第一频谱部分（921）和所述第二频谱部分; 其中，所述频率再生器（906）被配置用于确定（912）包括具有所述重建频带中的频率值的所述第一频谱部分的累积能量的存活能量信息，确定（918）另外频谱部分（922， （920）的频率值不同于在重建频带（920）中具有频率的第一频谱部分（921）的重建频带（920）的重建频带（920）中的另一频谱部分（923），其中通过使用 与重建频带中的第一频谱部分（921,306）不同的第一频谱部分（302）; 使用重建频带的单独能量和存活能量信息来确定（914）重建频带（920）中的能量缺失; 以及基于所述丢失的能量信息和所述瓦片能量信息来调整（916）所述重建频带中的所述另外的频谱部分。