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1. 发明申请

WO2022189188A1 APPARATUS AND METHOD FOR ADAPTIVE BACKGROUND AUDIO GAIN SMOOTHING 审中-公开
公开(公告)号：WO2022189188A1
公开(公告)日：2022-09-15
申请号：PCT/EP2022/055013
申请日：2022-02-28
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： TRAVAGLINI, Alessandro , LAMPRECHT, Lukas , PAULUS, Jouni , UHLE, Christian , SIMON, Christian , TURNWALD, Andreas
IPC分类号： G10L25/78 , G10L21/0316 , G10L21/02
摘要： An apparatus (100) for providing a sequence of output gains, wherein the sequence of output gains is suitable for attenuating a background signal of an audio signal is provided. The apparatus (100) comprises a signal characteristics provider (110) configured to receive or to determine signal characteristics information on one or more characteristics of the audio signal, wherein the signal characteristics information depends on the background signal, wherein the signal characteristics information comprises a sequence of input gains which depends on the background signal and on a foreground signal of the audio signal. Moreover, the apparatus (100) comprises a gain sequence generator (120) configured to determine the sequence of output gains depending on the sequence of input gains. To determine the sequence of outputs gains, to modify a current gain value of a current gain of the sequence of output gains to a target gain value, the gain sequence generator (120) is configured to determine a plurality of succeeding gains, which succeed the current gain in the sequence of output gains, by gradually changing the current gain value according to a modification rule during a transition period to the target gain value. The modification rule depends on the signal characteristics information; and/or the gain sequence generator (120) is configured to determine the target gain value depending on a further one of the one or more signal characteristics in addition to the sequence of input gains.

2. 发明申请

WO2018177610A1 APPARATUS AND METHOD FOR DETERMINING A PREDETERMINED CHARACTERISTIC RELATED TO AN ARTIFICIAL BANDWIDTH LIMITATION PROCESSING OF AN AUDIO SIGNAL 审中-公开
公开(公告)号：WO2018177610A1
公开(公告)日：2018-10-04
申请号：PCT/EP2018/025081
申请日：2018-03-29
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNI VERSITÄT ERLANGEN-NÜRNBERG
发明人： GAMPP, Patrick , UHLE, Christian , DISCH, Sascha , KARAMPOURNIOTIS, ANTonios , HAVENSTEIN, Julia , HELLMUTH, Oliver , HERRE, Jürgen , PROKEIN, Peter
IPC分类号： G10L21/038 , G10L25/69
摘要： An apparatus for determining a predetermined characteristic related to an artificial bandwidth limitation processing of an audio signal comprises a slope evaiuator configured for evaluating a slope of a spectrum of the audio signal to obtain a slope evaluation result. The apparatus comprises a frequency evaiuator configured for evaluating a cut-off frequency of the spectrum of the audio signal to obtain a frequency evaluation result, and comprises a processor for providing an information indicating that the audio signal comprises the predetermined characteristic dependent on an evaluation of the slope evaluation result and an evaluation of the frequency evaluation result.

3. 发明申请

WO2016016189A1 APPARATUS AND METHOD FOR ENHANCING AN AUDIO SIGNAL, SOUND ENHANCING SYSTEM 审中-公开
标题翻译：用于增强音频信号，声音增强系统的装置和方法
公开(公告)号：WO2016016189A1
公开(公告)日：2016-02-04
申请号：PCT/EP2015/067158
申请日：2015-07-27
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： UHLE, Christian , GAMPP, Patrick , HELLMUTH, Oliver , VARGA, Stefan , SCHARRER, Sebastian
IPC分类号： G10L19/008 , G10L21/0264
CPC分类号： G10L21/0308 , G10L19/008 , G10L19/0204 , G10L19/025 , G10L21/0264
摘要： An apparatus for enhancing an audio signal comprises a signal processor for processing the audio signal in order to reduce or eliminate transient and tonal portions of the processed signal and a decorrelator for generating a first decorrelated signal and a second decorrelated signal from the processed signal. The apparatus further comprises a combiner for weightedly combining the first and the second decorrelated signal and the audio signal or a signal derived from the audio signal by coherence enhancement using time variant weighting factors and to obtain a two-channel audio signal. The apparatus further comprises a controller for controlling the time variant weighting factors by analyzing the audio signal so that different portions of the audio signal are multiplied by different weighting factors and the two-channel audio signal has a time variant degree of decorrelation.
摘要翻译：用于增强音频信号的装置包括用于处理音频信号以便减少或消除经处理的信号的瞬态和音调部分的信号处理器，以及用于从处理的信号产生第一去相关信号和第二去相关信号的解相关器。该装置还包括一个组合器，用于通过使用时变加权因子的相干增强来加权组合第一和第二解相关信号和音频信号或从音频信号导出的信号，并获得双声道音频信号。该装置还包括控制器，用于通过分析音频信号来控制时变加权因子，使得音频信号的不同部分被不同的加权因子相乘，并且双声道音频信号具有解相关的时变度。

4. 发明申请

WO2013004697A1 METHOD AND APPARATUS FOR DECOMPOSING A STEREO RECORDING USING FREQUENCY-DOMAIN PROCESSING EMPLOYING A SPECTRAL SUBTRACTOR 审中-公开
标题翻译：使用采用频谱分析器的频域处理来分解立体声记录的方法和装置
公开(公告)号：WO2013004697A1
公开(公告)日：2013-01-10
申请号：PCT/EP2012/062930
申请日：2012-07-03
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , UHLE, Christian , FINAUER, Stefan , GAMPP, Patrick , HELLMUTH, Oliver , PROKEIN, Peter , STÖCKLMEIER, Christian
发明人： UHLE, Christian , FINAUER, Stefan , GAMPP, Patrick , HELLMUTH, Oliver , PROKEIN, Peter , STÖCKLMEIER, Christian
IPC分类号： H04S3/00
CPC分类号： H04S1/00 , H04S1/002 , H04S3/002
摘要： An apparatus for generating a stereo side signal having a first side channel and a second side channel from a stereo input signal having a first input channel and a second input channel is provided. The apparatus comprises a modification information generator (110) for generating modification information based on mid-side information. Furthermore, the apparatus comprises a signal manipulator (120) being adapted to manipulate the first input channel based on the modification information to obtain the first side channel and being adapted to manipulate the second input channel based on the modification information to obtain the second side channel. The modification information generator (110) comprises a spectral subtractor (115) for generating the modification information by generating a difference value indicating a difference between a mono mid signal or a mono side signal of the stereo input signal and the first or the second input channel.
摘要翻译：提供一种用于从具有第一输入通道和第二输入通道的立体声输入信号产生具有第一侧通道和第二侧通道的立体声侧信号的装置。该装置包括用于基于中间信息生成修改信息的修改信息生成器（110）。此外，该装置包括信号操纵器（120），其适于基于修改信息来操纵第一输入通道以获得第一侧通道并且适于基于修改信息来操纵第二输入通道以获得第二侧通道。修改信息生成器（110）包括频谱减法器（115），用于通过产生指示立体声输入信号的单声道中信号或单声道信号与第一或第二输入声道之间的差异的差值来产生修改信息。

5. 发明申请

WO2011131732A1 APPARATUS AND METHOD FOR MODIFYING AN INPUT AUDIO SIGNAL 审中-公开
标题翻译：用于修改输入音频信号的装置和方法
公开(公告)号：WO2011131732A1
公开(公告)日：2011-10-27
申请号：PCT/EP2011/056355
申请日：2011-04-20
申请人： FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , UHLE, Christian , HERRE, Jürgen , HELLMUTH, Oliver , FINAUER, Stefan
发明人： UHLE, Christian , HERRE, Jürgen , HELLMUTH, Oliver , FINAUER, Stefan
IPC分类号： H03G3/32 , H04S7/00 , G10L21/00 , G10L21/02
CPC分类号： G10L21/00 , G10L21/0264 , G10L21/0364 , G10L25/69 , H03G9/005 , H03G9/025
摘要： An apparatus for modifying an input audio signal comprises an excitation determiner, a storage device and a signal modifier. The excitation determiner determines a value of an excitation parameter of a subband of a plurality of subbands of the input audio signal based on an energy content of the subband. Further, the storage device stores a lookup table containing a plurality of spectral weighting factors. A spectral weighting factor of the plurality of spectral weighting factors is associated to a predefined value of the excitation parameter and a subband of the plurality of subbands. The storage device provides a spectral weighting factor corresponding to the determined value of the excitation parameter and corresponding to the subband, the value of the excitation parameter is determined for. Further, the signal modifier modifies a content of the subband of the audio signal, the value of the excitation parameter is determined for, based on the provided spectral weighting factor to provide a modified subband.
摘要翻译：用于修改输入音频信号的装置包括激励确定器，存储装置和信号修改器。激励确定器基于子带的能量含量来确定输入音频信号的多个子带的子带的激励参数的值。此外，存储装置存储包含多个频谱加权因子的查找表。多个频谱加权因子的频谱加权因子与激励参数的预定义值和多个子带中的子带相关联。存储装置提供对应于确定的激励参数值并对应于子带的频谱加权因子，确定激励参数的值。此外，信号修改器修改音频信号的子带的内容，基于所提供的频谱加权因子来确定激励参数的值以提供修改的子带。

6. 发明申请

WO2020127900A1 APPARATUS AND METHOD FOR SOURCE SEPARATION USING AN ESTIMATION AND CONTROL OF SOUND QUALITY 审中-公开
公开(公告)号：WO2020127900A1
公开(公告)日：2020-06-25
申请号：PCT/EP2019/086565
申请日：2019-12-20
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： UHLE, Christian , TORCOLI, Matteo , DISCH, Sascha , PAULUS, Jouni , HERRE, Jürgen , HELLMUTH, Oliver , FUCHS, Harald
IPC分类号： G10L21/0308 , G10L25/30 , G10L25/60
摘要： An apparatus for generating a separated audio signal from an audio input signal is provided. The audio input signal comprises a target audio signal portion and a residual audio signal portion. The residual audio signal portion indicates a residual between the audio input signal and the target audio signal portion. The apparatus comprises a source separator (110), a determining module (120) and a signal processor (130). The source separator (110) is configured to determine an estimated target signal which depends on the audio input signal, the estimated target signal being an estimate of a signal that only comprises the target audio signal portion. The determining module (120) is configured to determine one or more result values depending on an estimated sound quality of the estimated target signal to obtain one or more parameter values, wherein the one or more parameter values are the one or more result values or depend on the one or more result values. The signal processor (130) is configured to generate the separated audio signal depending on the one or more parameter values and depending on at least one of the estimated target signal and the audio input signal and an estimated residual signal, the estimated residual signal being an estimate of a signal that only comprises the residual audio signal portion.

7. 发明申请

WO2018177612A1 APPARATUS AND METHOD FOR DETERMINING A PREDETERMINED CHARACTERISTIC RELATED TO A SPECTRAL ENHANCEMENT PROCESSING OF AN AUDIO SIGNAL 审中-公开
公开(公告)号：WO2018177612A1
公开(公告)日：2018-10-04
申请号：PCT/EP2018/025083
申请日：2018-03-29
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNI VERSITÄT ERLANGEN-NÜRNBERG
发明人： GAMPP, Patrick , UHLE, Christian , DISCH, Sascha , KARAMPOURNIOTIS, Antonios , HAVENSTEIN, Julia , HELLMUTH, Oliver , HERRE, Jürgen , PROKEIN, Peter
IPC分类号： G10L25/69 , G10L21/038
摘要： An apparatus for determining a predetermined characteristic related to a spectral enhancement processing of an audio signal comprises a deriver configured for obtaining a spectrum of the audio signal and for deriving a local maximum signal from the spectrum. The apparatus comprises a determiner configured for determining a similarity between segments of the local maximum signal and comprises a processor for providing an information indicating that the audio signal comprises the predetermined characteristic dependent on an evaluation of the similarity.

8. 发明申请

WO2017178454A1 APPARATUS AND METHOD FOR PROVIDING INDIVIDUAL SOUND ZONES 审中-公开
标题翻译：提供个人声音区的装置和方法
公开(公告)号：WO2017178454A1
公开(公告)日：2017-10-19
申请号：PCT/EP2017/058611
申请日：2017-04-11
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： SCHNEIDER, Martin , WETZEL, Stefan , WALTHER, Andreas , UHLE, Christian , HELLMUTH, Oliver , PROKEIN, Peter , HABETS, Emanuel
IPC分类号： H04S7/00
摘要： An apparatus for generating a plurality of loudspeaker signals from two or more audio source signals is provided. Each of the two or more audio source signals shall be reproduced in one or more of two or more sound zones, and at least one of the two or more audio source signals shall not be reproduced in at least one of the two more sound zones. The apparatus comprises an audio preprocessor (110) configured to modify each of two or more initial audio signals to obtain two or more preprocessed audio signals. Moreover, the apparatus comprises a filter (140) configured to generate the plurality of loudspeaker signals depending on the two or more preprocessed audio signals. The audio preprocessor (110) is configured to use the two or more audio source signals as the two or more initial audio signals, or wherein the audio preprocessor (110) is configured to generate for each audio source signal of the two or more audio source signals an initial audio signal of the two more initial audio signals by modifying said audio source signal. Moreover, the audio preprocessor (110) is configured to modify each initial audio signal of the two or more initial audio signals depending on a signal power or a loudness of another initial audio signal of the two or more initial audio signals. The filter (140) is configured to generate the plurality of loudspeaker signals depending on in which of the two or more sound zones the two or more audio source signals shall be reproduced and depending on in which of the two or more sound zones the two or more audio source signals shall not be reproduced.
摘要翻译：提供了一种用于从两个或更多个音频源信号生成多个扬声器信号的装置。两个或更多音频源信号中的每一个应在两个或更多声音区中的一个或更多个中重现，并且两个或更多个音频源信号中的至少一个不得在两个更多声音区中的至少一个中重现。该设备包括被配置为修改两个或更多个初始音频信号中的每一个以获得两个或更多个预处理音频信号的音频预处理器（110）。此外，该装置包括滤波器（140），其被配置为根据两个或更多个预处理的音频信号来生成多个扬声器信号。音频预处理器（110）被配置为使用两个或更多个音频源信号作为两个或更多个初始音频信号，或者其中音频预处理器（110）被配置为针对两个或更多音频源的每个音频源信号通过修改所述音频源信号来发信号通知两个更多初始音频信号中的初始音频信号。此外，音频预处理器（110）被配置为根据两个或更多个初始音频信号中的另一个初始音频信号的信号功率或响度来修改两个或更多个初始音频信号中的每个初始音频信号。滤波器（140）被配置为根据两个或更多个音频源信号将被再现的两个或更多个声音区域中的哪个区域以及根据两个或更多个声音区域中的哪个声音区域来再现两个或更多个声音区域来生成多个扬声器信号不得复制更多音频源信号。

9. 发明申请

WO2012116934A1 APPARATUS AND METHOD FOR DETERMINING A MEASURE FOR A PERCEIVED LEVEL OF REVERBERATION, AUDIO PROCESSOR AND METHOD FOR PROCESSING A SIGNAL 审中-公开
标题翻译：用于确定复现级别的音频处理器和处理信号的方法的测量装置和方法
公开(公告)号：WO2012116934A1
公开(公告)日：2012-09-07
申请号：PCT/EP2012/053193
申请日：2012-02-24
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG , UHLE, Christian , PAULUS, Jouni , HERRE, Juergen , PROKEIN, Peter , HELLMUTH, Oliver
发明人： UHLE, Christian , PAULUS, Jouni , HERRE, Juergen , PROKEIN, Peter , HELLMUTH, Oliver
IPC分类号： H04S5/00 , G10K15/12
CPC分类号： G10K15/08 , H04R29/00 , H04S5/005 , H04S7/30 , H04S2400/13 , H04S2420/07
摘要： An apparatus for determining a measure for a perceived level of reverberation in a mix signal consisting of a direct signal component (100) and a reverberation signal component (102), comprises a loudness model processor (104) comprising a perceptual filter stage for filtering the dry signal component (100) the reverberation signal component (102) or the mix signal, wherein the perceptual filter stage is configured for modeling an auditory perception mechanism of an entity to obtain a filtered direct signal, a filtered reverberation signal or a filtered mix signal. The apparatus furthermore comprises a loudness estimator for estimating a first loudness measure using the filtered direct signal and for estimating a second loudness measure using the filtered reverberation signal or the filtered mix signal, where the filtered mix signal is derived from a superposition of the direct signal component and the reverberation signal component. The apparatus furthermore comprises a combiner (110) for combining the first and the second loudness measures (106, 108) to obtain a measure (112) for the perceived level of reverberation.
摘要翻译：一种用于确定由直接信号分量（100）和混响信号分量（102）组成的混合信号中感知到的混响水平的测量装置，包括响度模型处理器（104），其包括感知滤波器级，用于对干信号分量（100）混响信号分量（102）或混合信号，其中感知滤波级被配置为对实体的听觉感知机制进行建模以获得经滤波的直接信号，滤波的混响信号或经滤波的混合信号。该装置还包括响度估计器，用于使用经滤波的直接信号估计第一响度测量值，并且使用经过滤波的混响信号或滤波的混合信号来估计第二响度测量值，其中滤波后的混合信号是从直接信号的叠加得到的分量和混响信号分量。该装置还包括组合器（110），用于组合第一和第二响度度量（106,108），以获得感知的混响水平的度量（112）。

10. 发明申请

WO2005114651A1 VORRICHTUNG UND VERFAHREN ZUM ANALYSIEREN EINES INFORMATIONSSIGNALS 审中-公开
标题翻译：装置和方法用于分析信息信号
公开(公告)号：WO2005114651A1
公开(公告)日：2005-12-01
申请号：PCT/EP2005/004685
申请日：2005-04-29
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DITTMAR, Christian , UHLE, Christian , HERRE, Jürgen
发明人： DITTMAR, Christian , UHLE, Christian , HERRE, Jürgen
IPC分类号： G10L11/00
CPC分类号： G10L25/48
摘要： Zum Analysieren eines Informationssignals wird ein signifikantes Kurzzeitspektrum aus dem Informationssignal extrahiert, wobei die Einrichtung (16) zum Extrahieren ausgebildet ist, um solche Kurzzeitspektren zu extrahieren, die einer spezifischen Charakteristik näher kommen als andere Kurzzeitspektren des Informationssignals. Die extrahierten Kurzzeitspektren werden dann in Komponentensignale zerlegt (18), und zwar unter Verwendung einer ICA-Analyse, wobei ein Komponentensignalspektrum ein Profilspektrum einer Tonquelle darstellt, die einen Ton erzeugt, der der gesuchten Charakteristik entspricht. Aus einer Folge von Kurzzeitspektren des Informationssignals und aus den ermittelten Profilspektren wird schließlich für jedes Profilspektrum eine Amplitudenhüllkurve berechnet (20), die angibt, wie sich ein Profilspektrum einer Tonquelle über der Zeit insgesamt ändert. Die Profilspektren samt zugeordneten Amplitudenhüllkurven liefern eine Beschreibung des Informationssignals, die z.B. zu Zwecken einer Transkription im Falle eines Musiksignals weiter ausgewertet werden kann.
摘要翻译：用于分析的信息信号，信息信号的一个显著短时频谱被提取，其中所述用于提取的装置（16），被配置为提取这种短时频谱，其更接近比信息信号的其他短时频谱的特定特性。然后将提取的短时频谱分解为分量信号（18），并使用ICA分析，表示其产生对应于所寻求的特性的音调的音调源的轮廓频谱分量信号的频谱。是所述信息信号的短时频谱的序列，并且从所确定的轮廓光谱用于指示每个轮廓最后的振幅频谱进行计算（20）如何随时间变化的音源的变化的轮廓的频谱，作为一个整体。具有相关幅度包络轮廓光谱一起提供的信息信号，例如的描述可进一步评价在音乐信号的情况下转录的用途。

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