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126 条记录 (耗时 0.041 秒)

    AUDIO ENCODERS, AUDIO DECODERS, SYSTEMS, METHODS AND COMPUTER PROGRAMS USING AN INCREASED TEMPORAL RESOLUTION IN TEMPORAL PROXIMITY OF ONSETS OR OFFSETS OF FRICATIVES OR AFFRICATES
    87.
    发明公开
    AUDIO ENCODERS, AUDIO DECODERS, SYSTEMS, METHODS AND COMPUTER PROGRAMS USING AN INCREASED TEMPORAL RESOLUTION IN TEMPORAL PROXIMITY OF ONSETS OR OFFSETS OF FRICATIVES OR AFFRICATES 审中-公开
    音频编码器，音频解码器，系统，方法和计算机程序，使用增加的时间分辨率在时间接近发射或偏移的法语或非语言

    公开(公告)号：EP3279894A1

    公开(公告)日：2018-02-07

    申请号：EP17191504.4

    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

    摘要： An audio encoder for providing an encoded audio information on the basis of an input audio information comprises 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： 一种用于基于输入音频信息提供编码音频信息的音频编码器包括：带宽扩展信息提供器，被配置为使用可变时间分辨率提供带宽扩展信息;以及检测器，被配置为检测摩擦音或附加音的开始。 音频编码器被配置为调整由带宽扩展信息提供器使用的时间分辨率，使得带宽扩展信息被提供有增加的时间分辨率，至少持续预定时间段，之后是摩擦音或音叉的开始的时间 在检测到摩擦音或附属物起始的时间之后检测并持续预定的时间段。 备选地或附加地，响应于检测到摩擦或擦伤的偏移，带宽扩展信息被提供有增加的时间分辨率。 音频编码器和方法使用相应的概念。

    APPARATUS AND METHOD REALIZING A FADING OF AN MDCT SPECTRUM TO WHITE NOISE PRIOR TO FDNS APPLICATION
    88.
    发明授权
    APPARATUS AND METHOD REALIZING A FADING OF AN MDCT SPECTRUM TO WHITE NOISE PRIOR TO FDNS APPLICATION 有权
    在FDNS应用程序之前实现MDCT频谱向白噪声衰落的装置和方法

    公开(公告)号：EP3011559B1

    公开(公告)日：2017-07-26

    申请号：EP14732195.4

    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

    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： 提供了一种用于对编码的音频信号进行解码以获得重建的音频信号的装置，具有：用于接收一个或多个帧的接收接口，系数发生器和信号重构器。 系数发生器被配置为确定一个或多个第一音频信号系数以及一个或多个噪声系数。 此外，系数发生器被配置为根据一个或多个第一音频信号系数并且取决于一个或多个噪声系数来生成一个或多个第二音频信号系数。 音频信号重构器被配置为根据一个或多个第一音频信号系数来重建重建的音频信号的第一部分，并且音频信号重构器被配置为根据一个或多个第二音频信号重建重建的音频信号的第二部分 音频信号系数，如果接收接口没有接收到当前帧，或者接收接口接收到的当前帧被破坏。

    HARMONICITY-DEPENDENT CONTROLLING OF A HARMONIC FILTER TOOL
    89.
    发明公开
    HARMONICITY-DEPENDENT CONTROLLING OF A HARMONIC FILTER TOOL 有权
    谐波滤波器工具的谐波相关控制

    公开(公告)号：EP3175455A1

    公开(公告)日：2017-06-07

    申请号：EP15744175.9

    申请日：2015-07-27

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

    发明人： MARKOVIC, Goran ,  HELMRICH, Christian ,  RAVELLI, Emmanuel ,  JANDER, Manuel ,  DÖHLA, Stefan

    IPC分类号： G10L19/26

    CPC分类号： G10L19/265 ,  G10L19/025 ,  G10L19/028 ,  G10L19/12 ,  G10L19/22 ,  G10L19/26 ,  G10L25/21 ,  G10L25/90

    摘要： The coding efficiency of an audio codec using a controllable - switchable or even adjustable - harmonic filter tool is improved by performing the harmonicity-dependent controlling of this tool using a temporal structure measure in addition to a measure of harmonicity in order to control the harmonic filter tool. In particular, the temporal structure of the audio signal is evaluated in a manner which depends on the pitch. This enables to achieve a situation-adapted control of the harmonic filter tool so that in situations where a control made solely based on the measure of harmonicity would decide against or reduce the usage of this tool, although using the harmonic filter tool would, in that situation, increase the coding efficiency, the harmonic filter tool is applied, while in other situations where the harmonic filter tool may be inefficient or even destructive, the control reduces the appliance of the harmonic filter tool appropriately.

    摘要翻译： 使用可控切换或甚至可调谐滤波器工具的音频编解码器的编码效率通过除了谐度测量之外还使用时间结构测量执行该工具的谐度相关控制来改进以便控制谐波滤波器 工具。 具体而言，音频信号的时间结构以取决于音高的方式评估。 这使得能够实现对谐波滤波器工具的情况适应性控制，使得在仅基于谐度测量而做出的控制将决定或减少该工具的使用的情况下，虽然使用谐波滤波器工具将会 情况下，增加编码效率，应用谐波滤波器工具，而在谐波滤波器工具效率低下甚至破坏的其他情况下，该控制措施可适当减少谐波滤波器工具的使用。