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1. 发明公开

EP2717265A1 Encoder, decoder and methods for backward compatible dynamic adaption of time/frequency resolution in spatial-audio-object-coding 审中-公开
标题翻译：编码器，解码器和在空间音频对象编码为时间/频率分辨率的向后兼容的动态调整的方法
公开(公告)号：EP2717265A1
公开(公告)日：2014-04-09
申请号：EP13167481.4
申请日：2013-05-13
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
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。

2. 发明公开

EP3288031A1 APPARATUS AND METHOD FOR ENCODING AN AUDIO SIGNAL USING A COMPENSATION VALUE 审中-公开
标题翻译：用补偿值编码音频信号的装置和方法
公开(公告)号：EP3288031A1
公开(公告)日：2018-02-28
申请号：EP16185398.1
申请日：2016-08-23
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
发明人： Disch, Sascha , Reutelhuber, Franz , Büthe, Jan , Multrus, Markus , Edler, Bernd
IPC分类号： G10L21/038
CPC分类号： G10L21/038
摘要： An apparatus for encoding an audio signal, comprises: a core encoder for core encoding first audio data in a first spectral band; a parametric coder for parametrically coding second audio data in a second spectral band being different from the first spectral band, wherein the parametric coder comprises: an analyzer for analyzing first audio data in the first spectral band to obtain a first analysis result and for analyzing second audio data in the second spectral band to obtain a second analysis result; a compensator for calculating a compensation value using the first analysis result and the second analysis result; and a parameter calculated for calculating a parameter from the second audio data in the second spectral band using the compensation value.
摘要翻译：一种用于编码音频信号的设备，包括：核心编码器，用于对第一频谱带中的第一音频数据进行核心编码; 参数编码器，用于参数化地编码与所述第一光谱带不同的第二光谱带中的第二音频数据，其中所述参数编码器包括：分析器，用于分析所述第一光谱带中的第一音频数据以获得第一分析结果并分析第二第二频谱段中的音频数据以获得第二分析结果; 补偿器，用于使用第一分析结果和第二分析结果来计算补偿值; 以及使用补偿值计算用于从第二频谱带中的第二音频数据计算参数的参数。

3. 发明公开

EP2720222A1 Apparatus and method for efficient synthesis of sinusoids and sweeps by employing spectral patterns 审中-公开
标题翻译：设备和方法，用于Sinosoiden和扫描的有效合成通过使用频谱图案
公开(公告)号：EP2720222A1
公开(公告)日：2014-04-16
申请号：EP12199266.3
申请日：2012-12-21
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
发明人： Disch, Sascha , Sschubert, Benjamin , Geiger, Ralf , Edler, Bernd , Dietz, Martin
IPC分类号： G10L19/02
CPC分类号： G10L19/02 , G10L19/0212 , G10L19/032
摘要： An apparatus for generating an audio output signal based on an encoded audio signal spectrum is provided. The apparatus comprises a processing unit (115) for processing the encoded audio signal spectrum to obtain a decoded audio signal spectrum comprising a plurality of spectral coefficients, wherein each of the spectral coefficients has a spectral location within the encoded audio signal spectrum and a spectral value, wherein the spectral coefficients are sequentially ordered according to their spectral location within the encoded audio signal spectrum so that the spectral coefficients form a sequence of spectral coefficients. Moreover, the apparatus comprises a pseudo coefficients determiner (125) for determining one or more pseudo coefficients of the decoded audio signal spectrum, each of the pseudo coefficients having a spectral value. Furthermore, the apparatus comprises a replacement unit (135) for replacing at least one or more pseudo coefficients by a determined spectral pattern to obtain a modified audio signal spectrum, wherein the determined spectral pattern comprises at least two pattern coefficients, wherein each of the at least two pattern coefficients has a spectral value. Moreover, the apparatus comprises a spectrum-time-conversion unit (145) for converting the modified audio signal spectrum to a time-domain to obtain the audio output signal.
摘要翻译：提供了一种用于在在编码的音频信号的频谱基于音频输出信号产生的装置。该装置包括一个处理单元（115），用于处理经编码的音频信号的频谱，以获得解码音频信号的频谱，其包括频谱系数的多元worin每个频谱系数的具有经编码的音频信号频谱中的频谱位置和频谱值，worin频谱系数被顺序排列gemäß到他们的频谱位置中的编码的音频信号的频谱内所以做了频谱系数形成的频谱系数的序列。更上方，该装置包括一个伪系数确定器（125），用于确定的采矿一个或解码的音频信号的频谱的多个伪系数，每一个具有一个频谱值伪系数。进一步，该装置包括一个替换单元（135），用于通过确定性开采频谱图案替换至少一个或多个伪系数以获得经修改的音频信号的频谱，worin确定性开采频谱图案包括至少两个图案系数在worin每个至少两个图案系数具有光谱值。更上方，该装置包括一个频谱 - 时间变换单元（145）为修正的音频信号的频谱转换到时域，以获得所述音频输出信号。

4. 发明公开

EP3276620A1 TIME DOMAIN ALIASING REDUCTION FOR NON-UNIFORM FILTERBANKS WHICH USE SPECTRAL ANALYSIS FOLLOWED BY PARTIAL SYNTHESIS 审中-公开
标题翻译：非均匀滤波器的时域抑制减少了部分综合的频谱分析
公开(公告)号：EP3276620A1
公开(公告)日：2018-01-31
申请号：EP16181883.6
申请日：2016-07-29
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
发明人： Werner, Nils , Edler, Bernd
IPC分类号： G10L19/02 , G06F17/14
CPC分类号： G10L19/0212 , G06F17/147
摘要： Embodiments provide an audio processor for processing an audio signal to obtain a subband representation of the audio signal. The audio processor comprises a cascaded lapped critically sampled transform stage and a time domain aliasing reduction stage. The cascaded lapped critically sampled transform stage is configured to perform a cascaded lapped critically sampled transform on at least two partially overlapping blocks of samples of the audio signal, to obtain a set of subband samples on the basis of a first block of samples of the audio signal, and to obtain a corresponding set of subband samples on the basis of a second block of samples of the audio signal. The time domain aliasing reduction stage is configured to perform a weighted combination of two corresponding sets of subband samples, one obtained on the basis of the first block of samples of the audio signal and one obtained on the basis on the second block of samples of the audio signal, to obtain an aliasing reduced subband representation of the audio signal.
摘要翻译：实施例提供一种用于处理音频信号以获得音频信号的子带表示的音频处理器。音频处理器包括级联重叠临界采样变换级和时域混叠压缩级。级联重叠临界采样变换级被配置为对音频信号的至少两个部分重叠的采样块执行级联重叠临界采样变换，以基于音频采样的第一块样本获得一组子带采样信号，并且基于音频信号的第二采样块获得对应的一组子带采样。时域混叠减少级被配置为执行两个对应的子带样本集合的加权组合，一个子带样本是基于音频信号的第一样本块获得的，另一个是基于第二样本的第二样本获得的音频信号，以获得音频信号的混叠减少的子带表示。

5. 发明公开

EP2717262A1 Encoder, decoder and methods for signal-dependent zoom-transform in spatial audio object coding 审中-公开
标题翻译： Codierer，Decodierer und VerfahrenfürsignalabhängigeZoomumwandlung beim Spatial-Audio-Object-Coding
公开(公告)号：EP2717262A1
公开(公告)日：2014-04-09
申请号：EP13167487.1
申请日：2013-05-13
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
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：提供了一种用于从降混信号产生包括一个或多个音频输出声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。解码器包括用于根据一个或多个音频对象信号中的至少一个的信号属性将激活指示设置为激活状态的控制单元（181）。此外，解码器包括用于变换下混合信号以获得包括多个第一子带信道的第一变换下混合的第一分析模块（182）。此外，解码器包括第二分析模块（183），用于当激活指示被设置为激活状态时，通过转换第一子带信道中的至少一个以获得多个第二子带信道来产生第二变换下混合，其中第二变换下混合包括尚未被第二分析模块和第二子带信道变换的第一子带信道。此外，解码器包括解混合单元（184），其中，当激活指示被设置为激活状态时，解混合单元（184）被配置为基于参数侧信息来解混合第二变换下混合在一个或多个音频对象信号上获得音频输出信号，并且当激活指示未被设置为激活状态时，基于关于一个或多个音频对象的参数侧信息来解混合第一变换下混合信号以获得音频输出信号。此外，提供了一种编码器。

6. 发明公开

EP4404560A2 AUDIO DECODING METHOD FOR PROCESSING STEREO AUDIO SIGNALS USING A VARIABLE PREDICTION DIRECTION 审中-实审
公开(公告)号：EP4404560A2
公开(公告)日：2024-07-24
申请号：EP24167075.1
申请日：2011-02-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Julien, Robilliard , Neusinger, Matthias , Helmrich, Christian , Hilpert, Johannes , Rettelbach, Nikolaus , Disch, Sascha , Edler, Bernd
IPC分类号： H04N19/154
CPC分类号： G10L19/008 , G10L19/06 , H04N19/50 , H04N19/105 , H04N19/156 , H04N19/154 , H04N19/146 , H04N19/70
摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

7. 发明公开

EP4325723A3 APPARATUS AND METHOD FOR GENERATING TIME-DOMAIN AUDIO SAMPLES 有权
公开(公告)号：EP4325723A3
公开(公告)日：2024-04-17
申请号：EP23210951.2
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： G10L19/02 , G10L19/022 , G10L25/45 , H03H17/02 , G10L21/038
CPC分类号： G10L19/022 , H03H17/0266 , G10L21/038 , G10L25/45 , G10L19/0204
摘要： An apparatus for generating time-domain audio samples or synthesis filterbank (300) comprises a calculator (310) for calculating a frame (330) comprising a sequence of intermediate time-domain samples from audio subband values of block (320). The calculator (310) is coupled to a synthesis windower (360) to which the frame (330) of intermediate time-domain samples is provided. The synthesis windower (360) is adapted to windowing the sequence of intermediate time-domain samples using a synthesis window function (370) and provides a frame (380) of windowed intermediate time-domain samples. The synthesis windower (360) is coupled to an overlap-adder output stage (400) that obtains a block (410) of time-domain samples. The block (410) of the time-domain (output) samples can then for instance be provided to further components for further processing, storing or transforming into audible audio signals.

8. 发明公开

EP4254951A2 AUDIO DECODING METHOD FOR PROCESSING STEREO AUDIO SIGNALS USING A VARIABLE PREDICTION DIRECTION 审中-实审
公开(公告)号：EP4254951A2
公开(公告)日：2023-10-04
申请号：EP23187327.4
申请日：2011-02-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Robilliard, Julien , Neusinger, Matthias , Helmrich, Christian , Hilpert, Johannes , Rettelbach, Nikolaus , Disch, Sascha , Edler, Bernd
IPC分类号： H04N19/154
摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

9. 发明公开

EP3848928A1 APPARATUS AND METHOD FOR GENERATING COMPLEX-VALUED AUDIO SUBBAND VALUES 有权转让
公开(公告)号：EP3848928A1
公开(公告)日：2021-07-14
申请号：EP21160250.3
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： G10L19/02 , G10L19/022 , G10L25/45 , H03H17/02 , G10L21/038
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.

10. 发明公开

EP3779978A1 AUDIO OR VIDEO DECODER AND RELATED METHOD FOR PROCESSING MULTI-CHANNEL AUDIO OR VIDEO SIGNALS USING A VARIABLE PREDICTION DIRECTION 有权转让
公开(公告)号：EP3779978A1
公开(公告)日：2021-02-17
申请号：EP20199079.3
申请日：2011-02-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Robilliard, Julien , Neusinger, Matthias , Helmrich, Christian , Hilpert, Johannes , Rettelbach, Nikolaus , Disch, Sascha , Edler, Bernd
IPC分类号： G10L19/008 , G10L19/06 , H04N19/50
摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

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