公开(公告)号：EP3011557A1

公开(公告)日：2016-04-27

申请号：EP14732193.9

申请日：2014-06-23

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

发明人： SCHNABEL, Michael ,  MARKOVIC, Goran ,  SPERSCHNEIDER, Ralph ,  LECOMTE, Jérémie ,  HELMRICH, Christian

IPC分类号： G10L19/005 ,  G10L25/90 ,  G10L19/09

CPC分类号： G10L19/005 ,  G10L19/002 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/07 ,  G10L19/083 ,  G10L19/09 ,  G10L19/12 ,  G10L19/22 ,  G10L2019/0002 ,  G10L2019/0011 ,  G10L2019/0016

摘要： An apparatus for decoding an encoded audio signal to obtain a reconstructed audio signal is provided, having: a receiving interface for receiving one or more frames, a coefficient generator, and a signal reconstructor. The coefficient generator is configured to determine one or more first audio signal coefficients, and one or more noise coefficients. Moreover, the coefficient generator is configured to generate one or more second audio signal coefficients, depending on the one or more first audio signal coefficients and depending on the one or more noise coefficients. The audio signal reconstructor is configured to reconstruct a first portion of the reconstructed audio signal depending on the one or more first audio signal coefficients and the audio signal reconstructor is configured to reconstruct a second portion of the reconstructed audio signal depending on the one or more second audio signal coefficients, if the current frame is not received by the receiving interface or if the current frame being received by the receiving interface is corrupted.

摘要翻译： 用于编码音频信号的解码以获得重建的音频信号的装置被提供，其具有：接收接口，用于接收一个或多个帧，一个系数发生器，以及信号重构器。 系数生成器被配置为确定矿的一个或多个第一音频信号的系数，并且一个或多个噪声系数。 更上方，系数发生器被配置为生成一个或多个第二音频信号的系数，这取决于一个或多个第一音频信号和系数根据所述一个或多个噪声系数。 的音频信号重建器被配置为重建取决于一个或多个第一音频信号系数和音频信号重构器重构的音频信号的第一部分被配置以重构重构的音频信号的第二部分取决于一个或多个第二 系数的音频信号，如果当前帧不是由接收接口接收，或者如果由所述接收接口正在接收的当前帧恶化。

公开(公告)号：EP3011556A1

公开(公告)日：2016-04-27

申请号：EP14731961.0

申请日：2014-06-20

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

发明人： SUKOWSKI, Janine ,  SPERSCHNEIDER, Ralph ,  MARKOVIC, Goran ,  JAEGERS, Wolfgang ,  HELMRICH, Christian ,  EDLER, Bernd ,  GEIGER, Ralf

IPC分类号： G10L19/005 ,  G10L19/02

CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L19/06

摘要： An approach is described that obtains spectrum coefficients for a replacement frame of an audio signal. A tonal component of a spectrum of an audio signal is detected based on a peak that exists in the spectra of frames preceding a replacement frame. For the tonal component of the spectrum a spectrum coefficients for the peak and its surrounding in the spectrum of the replacement frame is predicted, and for the non-tonal component of the spectrum a non-predicted spectrum coefficient for the replacement frame or a corresponding spectrum coefficient of a frame preceding the replacement frame is used.

摘要翻译： 的方法进行说明那样取得的频谱系数的音频信号的替换帧。 的音频信号的频谱的音调型分量是基于检测到的峰值存在那样在帧的光谱preceding-替换帧。 对于频谱的音调型分量的峰值的频谱系数和其在更换帧的频谱周围被预测，并且对于频谱的非音调分量的替换帧或一个相应的频谱的非预测频谱系数 preceding-替换帧的帧的系数被使用。

公开(公告)号：EP2951815A1

公开(公告)日：2015-12-09

申请号：EP14702516.7

申请日：2014-01-28

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

发明人： DISCH, Sascha ,  HELMRICH, Christian ,  MULTRUS, Markus ,  SCHNELL, Markus ,  TRITTHART, Arthur

IPC分类号： G10L19/025 ,  G10L21/038

CPC分类号： G10L19/00 ,  G10L19/025 ,  G10L19/24 ,  G10L21/038

摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information has a bandwidth extension information provider configured to provide bandwidth extension information using a variable temporal resolution and a detector configured to detect an onset of a fricative or affricate. The audio encoder is configured to adjust a temporal resolution used by the bandwidth extension information provider such that bandwidth extension information is provided with an increased temporal resolution at least for a predetermined period of time before a time at which an onset of a fricative or affricate is detected and for a predetermined period of time following the time at which the onset of the fricative or affricate is detected. Alternatively or in addition, the bandwidth extension information is provided with an increased temporal resolution in response to a detection of an offset of a fricative or affricate. Audio encoders and methods use a corresponding concept.

摘要翻译： 用于输入音频信息的基础上的编码音频信息提供的音频编码器具有被配置成提供使用可变时间分辨率和被配置为在一个或擦音塞擦音的发作来检测检测器的带宽扩展信息的带宽扩展信息提供者。 音频编码器配置为调整由带宽扩展信息提供商的搜索使用的时间分辨率也带宽扩展信息以提高时间分辨率提供至少为预定时间段，在这一个时间之前发作的擦音或塞擦音是 检测并在之后被检测到擦音或塞擦音发作时的预定时间段。 可选地或此外，带宽扩展信息是在增加的时间分辨率响应于检测的一擦音或破擦音的偏移设置有。 音频编码器和方法使用相应的概念。

公开(公告)号：EP2883227A1

公开(公告)日：2015-06-17

申请号：EP14738857.3

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： G10L19/03 ,  G10L21/0388 ,  G10L19/02 ,  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： Apparatus for decoding an encoded audio signal comprising an encoded core signal (1), comprising: a core decoder (1400) for decoding the encoded core signal (1401) to obtain a decoded core signal; a tile generator (1404) for generating one or more spectral tiles having frequencies not included in the decoded core signal using a spectral portion of the decoded core signal; and a cross-over filter (1406) for spectrally cross-over filtering the decoded core signal and a first frequency tile having frequencies extending from a gap filling frequency (309) to an upper border frequency or for spectrally cross-over filtering a first frequency tile and a second frequency tile.

公开(公告)号：EP2867892A1

公开(公告)日：2015-05-06

申请号：EP13730249.3

申请日：2013-06-19

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

发明人： BÄCKSTRÖM, Tom ,  HELMRICH, Christian ,  FUCHS, Guillaume ,  MULTRUS, Markus ,  DIETZ, Martin

IPC分类号： G10L19/032 ,  G10L19/08

CPC分类号： G10L19/04 ,  G10L19/0017 ,  G10L19/02 ,  G10L19/032 ,  G10L19/08 ,  G10L25/12

摘要： Linear prediction based audio coding is improved by coding a spectrum composed of a plurality of spectral components using a probability distribution estimation determined for each of the plurality of spectral components from linear prediction coefficient information. In particular, the linear prediction coefficient information is available anyway. Accordingly, it may be used for determining the probability distribution estimation at both encoding and decoding side. The latter determination may be implemented in a computationally simple manner by using, for example, an appropriate parameterization for the probability distribution estimation at the plurality of spectral components. All together, the coding efficiency as provided by the entropy coding is compatible with probability distribution estimations as achieved using context selection, but its derivation is less complex. For example, the derivation may be purely analytically and/or does not require any information on attributes of neighboring spectral lines such as previously coded/decoded spectral values of neighboring spectral lines as is the case in spatial context selection.

摘要翻译： 通过使用从线性预测系数信息为多个频谱分量中的每一个确定的概率分布估计，对由多个频谱分量组成的频谱进行编码来改进基于线性预测的音频编码。 线性预测系数信息也可以使用。 因此，可以用于确定编码和解码侧的概率分布估计。 后者的确定可以通过使用例如对于多个频谱分量的概率分布估计的适当参数化，以计算简单的方式来实现。 由熵编码提供的编码效率与使用上下文选择实现的概率分布估计兼容，但其推导较不复杂。 衍生可以纯粹地分析地和/或不需要关于相邻谱线的属性的任何信息，例如相邻谱线的先前编码/解码的频谱值，如在空间上下文选择中的情况。

公开(公告)号：EP2411976B1

公开(公告)日：2014-05-21

申请号：EP10710836.7

申请日：2010-03-22

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

发明人： DISCH, Sascha ,  NAGEL, Frederik ,  NEUENDORF, Max ,  HELMRICH, Christian ,  ZORN, Dominik

IPC分类号： G10L19/025 ,  G10L21/038 ,  G10L21/007

CPC分类号： G10L21/038 ,  G10L19/025 ,  G10L21/007