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1. 发明申请

WO2018073253A1 APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL 审中-公开
标题翻译：用于处理音频信号的装置和方法
公开(公告)号：WO2018073253A1
公开(公告)日：2018-04-26
申请号：PCT/EP2017/076483
申请日：2017-10-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG
发明人： LOMBARD, Anthony , BIRZER, Bernhard , MAHNE, Dirk , MABANDE, Edwin , KÜCH, Fabian , HABETS, Emanuel , ANNIBALE, Paolo
IPC分类号： G10L21/0208 , H03G3/00 , H03G7/00 , G10L21/0316
摘要： An apparatus for processing an audio signal comprises an audio signal analyzer and a filter. The audio signal analyzer is configured to analyze an audio signal to determine a plurality of noise suppression filter values for a plurality of bands of the audio signal, wherein the analyzer is configured to determine a noise suppression filter value so that a noise suppression filter value is greater than or equal to a minimum noise suppression filter value and so that the minimum noise suppression value depends on a characteristic of the audio signal. The filter is configured for filtering the audio signal, wherein the filter is adjusted based on the noise suppression filter values.
摘要翻译：用于处理音频信号的设备包括音频信号分析器和滤波器。音频信号分析器被配置为分析音频信号以确定用于音频信号的多个频带的多个噪声抑制滤波器值，其中分析器被配置为确定噪声抑制滤波器值，使得噪声抑制滤波器值是大于或等于最小噪声抑制滤波器值，并且使得最小噪声抑制值取决于音频信号的特性。滤波器被配置用于对音频信号进行滤波，其中基于噪声抑制滤波器值来调整滤波器。

2. 发明公开

EP3393140A1 APPARATUS AND METHOD FOR MULTICHANNEL INTERFERENCE CANCELLATION 审中-公开
公开(公告)号：EP3393140A1
公开(公告)日：2018-10-24
申请号：EP17196416.6
申请日：2017-10-13
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
发明人： LUIS VALERO, Maria , HABETS, Emanuel , ANNIBALE, Paolo , LOMBARD, Anthony , WILD, Moritz , RUTHA, Marcel
IPC分类号： H04R3/02 , H04M9/08
CPC分类号： H04R3/02 , G10L21/0208 , G10L2021/02082 , G10L2021/02166 , H04M9/082 , H04R3/005 , H04R25/453
摘要： An apparatus for multichannel interference cancellation in a received audio signal comprising two or more received audio channels to obtain a modified audio signal comprising two or more modified audio channels is provided. The apparatus comprises a first filter unit (112) being configured to generate a first estimation of a first interference signal depending on a reference signal. Moreover, the apparatus comprises a first interference canceller (114) being configured to generate a first modified audio channel of the two or more modified audio channels from a first received audio channel of the two or more received audio channels depending on the first estimation of the first interference signal. Furthermore, the apparatus comprises a second filter unit (122) being configured to generate a second estimation of a second interference signal depending on the first estimation of the first interference signal. Moreover, the apparatus comprises a second interference canceller (124) being configured to generate a second modified audio channel of the two or more modified audio channels from a second received audio channel of the two or more received audio channels depending on the second estimation of the second interference signal.

3. 发明公开

EP3312838A1 APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL 审中-公开
标题翻译：用于处理音频信号的装置和方法
公开(公告)号：EP3312838A1
公开(公告)日：2018-04-25
申请号：EP16194467.3
申请日：2016-10-18
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
发明人： LOMBARD, Anthony , BIRZER, Bernhard , MAHNE, Dirk , MABANDE, Edwin , KÜCH, Fabian , HABETS, Emanuel , ANNIBALE, Paolo
IPC分类号： G10L21/0208 , H03G3/00 , H03G7/00 , G10L21/0316
CPC分类号： G10L21/0208 , G10L21/0316 , H03G3/002 , H03G7/007
摘要： An apparatus for processing an audio signal comprises an audio signal analyzer and a filter. The audio signal analyzer is configured to analyze an audio signal to determine a plurality of noise suppression filter values for a plurality of bands of the audio signal, wherein the analyzer is configured to determine a noise suppression filter value so that a noise suppression filter value is greater than or equal to a minimum noise suppression filter value and so that the minimum noise suppression value depends on a characteristic of the audio signal. The filter is configured for filtering the audio signal, wherein the filter is adjusted based on the noise suppression filter values.
摘要翻译：一种用于处理音频信号的设备包括音频信号分析器和滤波器。音频信号分析器被配置为分析音频信号以确定用于音频信号的多个频带的多个噪声抑制滤波器值，其中分析器被配置为确定噪声抑制滤波器值，使得噪声抑制滤波器值是大于或等于最小噪声抑制滤波器值，并且使得最小噪声抑制值取决于音频信号的特性。滤波器被配置用于对音频信号进行滤波，其中基于噪声抑制滤波器值来调整滤波器。

4. 发明申请

WO2018193028A1 APPARATUS AND METHOD FOR MULTICHANNEL INTERFERENCE CANCELLATION 审中-公开
公开(公告)号：WO2018193028A1
公开(公告)日：2018-10-25
申请号：PCT/EP2018/060006
申请日：2018-04-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： LUIS VALERO, Maria , HABETS, Emanuel , ANNIBALE, Paolo , LOMBARD, Anthony , WILD, Moritz , RUTHA, Marcel
IPC分类号： H04R3/02 , H04M9/08
摘要： An apparatus for multichannel interference cancellation in a received audio signal comprising two or more received audio channels to obtain a modified audio signal comprising two or more modified audio channels is provided. The apparatus comprises a first filter unit (112) being configured to generate a first estimation of a first interference signal depending on a reference signal. Moreover, the apparatus comprises a first interference canceller (114) being configured to generate a first modified audio channel of the two or more modified audio channels from a first received audio channel of the two or more received audio channels depending on the first estimation of the first interference signal. Furthermore, the apparatus comprises a second filter unit (122) being configured to generate a second estimation of a second interference signal depending on the first estimation of the first interference signal. Moreover, the apparatus comprises a second interference canceller (124) being configured to generate a second modified audio channel of the two or more modified audio channels from a second received audio channel of the two or more received audio channels depending on the second estimation of the second interference signal.

5. 发明申请

WO2012110482A2 NOISE GENERATION IN AUDIO CODECS 审中-公开
标题翻译：音频编解码器中的噪声产生
公开(公告)号：WO2012110482A2
公开(公告)日：2012-08-23
申请号：PCT/EP2012/052464
申请日：2012-02-14
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , SETIAWAN, Panji , WILDE, Stephan , LOMBARD, Anthony , DIETZ, Martin
发明人： SETIAWAN, Panji , WILDE, Stephan , LOMBARD, Anthony , DIETZ, Martin
IPC分类号： G10L19/00
CPC分类号： G10L19/00 , G10K11/16 , G10L19/005 , G10L19/012 , G10L19/0212 , G10L19/025 , G10L19/03 , G10L19/04 , G10L19/107 , G10L19/12 , G10L19/22 , G10L19/26 , G10L21/0216 , G10L25/06 , G10L25/78
摘要： The spectral domain is efficiently used in order to parameterize the background noise thereby yielding a background noise synthesis which is more realistic and thus leads to a more transparent active to inactive phase switching.
摘要翻译：谱域被有效地用于参数化背景噪声，从而产生更现实的背景噪声合成，从而导致更加透明的主动到非主动的相位切换。

6. 发明申请

WO2014096279A1 GENERATION OF A COMFORT NOISE WITH HIGH SPECTRO-TEMPORAL RESOLUTION IN DISCONTINUOUS TRANSMISSION OF AUDIO SIGNALS 审中-公开
标题翻译：在不间断传输音频信号的情况下生成具有高光谱分辨率的舒适噪声
公开(公告)号：WO2014096279A1
公开(公告)日：2014-06-26
申请号：PCT/EP2013/077525
申请日：2013-12-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： LOMBARD, Anthony , DIETZ, Martin , WILDE, Stephan , RAVELLI, Emmanuel , SETIAWAN, Panji , MULTRUS, Markus
IPC分类号： G10L19/012
CPC分类号： G10L19/012 , G10L19/002 , G10L19/24
摘要： the invention provides an audio decoder being configured for decoding a bit- stream so as to produce therefrom an audio output signal, the bitstream comprising at least an active phase followed by at least an inactive phase, wherein the bitstream has encoded therein at least a silence insertion descriptor frame which describes a spectrum of a background noise, the audio decoder comprising: a silence insertion descriptor decoder configured to decode the silence insertion descriptor frame so as to reconstruct a spectrum of the background noise; a decoding device configured to reconstruct the audio output signal from the bitstream during the active phase; a spectral converter configured to determine a spectrum of the audio output signal a noise estimator device configured to determine a first spectrum of the noise of the audio output signal based on the spectrum of the audio output signal provided by the spectral converter, wherein the first spectrum of the noise of the audio output signal has a higher spectral resolution than the spectrum of the background noise; a resolution converter configured to establish a second spectrum of the noise of the audio output signal based on the first spectrum of the noise of the au- dio output signal, wherein the second spectrum of the noise of the audio output signal has a same spectral resolution as the spectrum of the background noise; a comfort noise spectrum estimation device having a scaling factor computing device configured to compute scaling factors for a spectrum for a comfort noise based on the spectrum of the background noise as provided by the silence insertion descriptor decoder and based on the second spectrum of the noise of the audio output signal as provided by the resolution converter and having a comfort noise spectrum generator configured to compute the spectrum for a comfort noise based on the scaling factors; and a comfort noise generator configured to produce the comfort noise during the inactive phase based on the spectrum for the comfort noise.
摘要翻译：本发明提供了一种音频解码器，其被配置用于对比特流进行解码以便从其产生音频输出信号，所述比特流至少包括一个活动相位，随后至少一个非活动阶段，其中该比特流至少在其中编码一个沉默插入描述符帧，其描述背景噪声的频谱，所述音频解码器包括：静音插入描述符解码器，被配置为解码所述静音插入描述符帧，以便重建所述背景噪声的频谱; 解码装置，被配置为在所述活动阶段期间重建来自所述比特流的所述音频输出信号; 频谱转换器，被配置为确定音频输出信号的频谱，噪声估计器装置被配置为基于由频谱转换器提供的音频输出信号的频谱来确定音频输出信号的噪声的第一频谱，其中第一频谱音频输出信号的噪声比背景噪声的频谱具有更高的频谱分辨率; 分辨率转换器，其被配置为基于所述自动输出信号的所述噪声的所述第一频谱建立所述音频输出信号的所述噪声的第二频谱，其中所述音频输出信号的所述噪声的所述第二频谱具有相同的光谱分辨率作为背景噪声的频谱; 舒适噪声谱估计装置，其具有比例因子计算装置，其被配置为基于由所述静音插入描述符解码器提供的所述背景噪声的频谱，基于所述噪声的第二频谱来计算用于舒适噪声的频谱的缩放因子，所述音频输出信号由所述分辨率转换器提供并具有舒适噪声谱发生器，其被配置为基于所述缩放因子来计算舒适噪声的频谱; 以及舒适噪声发生器，其被配置为基于用于舒适噪声的频谱在非活动阶段期间产生舒适噪声。

7. 发明申请

WO2014096280A1 COMFORT NOISE ADDITION FOR MODELING BACKGROUND NOISE AT LOW BIT-RATES 审中-公开
标题翻译：舒适的噪声添加用于建模低比特率的背景噪音
公开(公告)号：WO2014096280A1
公开(公告)日：2014-06-26
申请号：PCT/EP2013/077527
申请日：2013-12-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： FUCHS, Guillaume , LOMBARD, Anthony , RAVELLI, Emmanuel , DÖHLA, Stefan , LECOMTE, Jérémie , DIETZ, Martin
IPC分类号： G10L19/012 , G10L19/00
CPC分类号： G10L19/012
摘要： The invention provides a decoder being configured for processing an encoded audio bitstream (BS), wherein the decoder (1 ) comprises: a bitstream decoder (2) configured to derive a decoded audio signal (DS) from the bitstream (BS), wherein the decoded audio signal (DS) comprises at least one decoded frame; a noise estimation device (3) configured to produce a noise estimation signal (NE) containing an estimation of the level and/or the spectral shape of a noise (N) in the decoded audio signal (DS); a comfort noise generating device (4) configured to derive a comfort noise signal (CN) from the noise estimation signal (NE); and a combiner (5) configured to combine the decoded frame of the decoded audio signal (DS) and the comfort noise signal (CN) in order to obtain an audio output signal (OS).
摘要翻译：本发明提供了一种被配置用于处理编码音频比特流（BS）的解码器，其中解码器（1）包括：比特流解码器（2），被配置为从比特流（BS）导出解码音频信号（DS），其中解码音频信号（DS）包括至少一个解码帧; 噪声估计装置（3），被配置为产生包含所述解码音频信号（DS）中的噪声（N）的电平和/或频谱形状的估计的噪声估计信号（NE）; 舒适噪声生成装置（4），被配置为从所述噪声估计信号（NE）导出舒适噪声信号（CN）; 以及组合器（5），其被配置为组合解码音频信号（DS）的解码帧和舒适噪声信号（CN），以获得音频输出信号（OS）。

8. 发明申请

WO2016016051A1 METHOD FOR ESTIMATING NOISE IN AN AUDIO SIGNAL, NOISE ESTIMATOR, AUDIO ENCODER, AUDIO DECODER, AND SYSTEM FOR TRANSMITTING AUDIO SIGNALS 审中-公开
标题翻译：在音频信号中估计噪声的方法，噪声估计器，音频编码器，音频解码器和用于发送音频信号的系统
公开(公告)号：WO2016016051A1
公开(公告)日：2016-02-04
申请号：PCT/EP2015/066657
申请日：2015-07-21
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： SCHUBERT, Benjamin , JANDER, Manuel , LOMBARD, Anthony , DIETZ, Martin , MULTRUS, Markus
IPC分类号： G10L25/03 , G10L25/21 , G10L19/012 , G10L21/0216
CPC分类号： G10L21/0232 , G10L19/012 , G10L21/0216 , G10L21/038 , G10L25/03 , G10L25/21
摘要： A method is described that estimates noise in an audio signal (102). An energy value (174) for the audio signal (102) is estimated (S100) and converted (S102) into the logarithmic domain. A noise level for the audio signal (102) is estimated (S104) based on the converted energy value (178).
摘要翻译：描述了估计音频信号（102）中的噪声的方法。估计用于音频信号（102）的能量值（174）（S100）并将其转换（S102）为对数域。基于转换的能量值（178），估计音频信号（102）的噪声电平（S104）。

9. 发明公开

EP3529805A1 APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL 有权
公开(公告)号：EP3529805A1
公开(公告)日：2019-08-28
申请号：EP17791008.0
申请日：2017-10-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： LOMBARD, Anthony , BIRZER, Bernhard , MAHNE, Dirk , MABANDE, Edwin , KÜCH, Fabian , HABETS, Emanuel , ANNIBALE, Paolo
IPC分类号： G10L21/0208 , H03G3/00 , H03G7/00 , G10L21/0316
摘要： An apparatus for processing an audio signal comprises an audio signal analyzer and a filter. The audio signal analyzer is configured to analyze an audio signal to determine a plurality of noise suppression filter values for a plurality of bands of the audio signal, wherein the analyzer is configured to determine a noise suppression filter value so that a noise suppression filter value is greater than or equal to a minimum noise suppression filter value and so that the minimum noise suppression value depends on a characteristic of the audio signal. The filter is configured for filtering the audio signal, wherein the filter is adjusted based on the noise suppression filter values.

10. 发明公开

EP3614384A1 METHOD FOR ESTIMATING NOISE IN AN AUDIO SIGNAL, NOISE ESTIMATOR, AUDIO ENCODER, AUDIO DECODER, AND SYSTEM FOR TRANSMITTING AUDIO SIGNALS 有权
公开(公告)号：EP3614384A1
公开(公告)日：2020-02-26
申请号：EP19202338.0
申请日：2015-07-21
申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.
发明人： SCHUBERT, Benjamin , JANDER, Manuel , LOMBARD, Anthony , DIETZ, Martin , MULTRUS, Markus
IPC分类号： G10L25/03 , G10L25/21 , G10L19/012 , G10L21/0216
摘要： Estimating noise in an audio signal (102) includes determining (S100) an energy value (174) for the audio signal (102); converting (S102) the energy value (174) into the log2-domain; and estimating (S104) a noise level (182) for the audio signal (102) based on the converted energy value (178) directly in the log2-domain. The energy value (174) is converted (S102) into the log2-domain as follows: E n_log = ⌊ log 2 1 + E n_lin ⋅ 2 N ⌋ 2 N
└ x ┘
floor (x), indicating the largest integer less than or equal to x,
E n_log
energy value of band n in the log2-domain,
E n _ lin
energy value of band n in the linear domain,
N
quantization resolution.
The noise estimates are transmitted as parameters in the form of Silence Insertion Descriptor, SID, frames to update the amplitude of random sequences generated in each frequency band at a decoder side during inactive phases.

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