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    DECODER FOR GENERATING A FREQUENCY ENHANCED AUDIO SIGNAL, METHOD OF DECODING, ENCODER FOR GENERATING AN ENCODED SIGNAL AND METHOD OF ENCODING USING COMPACT SELECTION SIDE INFORMATION
    2.
    发明公开
    DECODER FOR GENERATING A FREQUENCY ENHANCED AUDIO SIGNAL, METHOD OF DECODING, ENCODER FOR GENERATING AN ENCODED SIGNAL AND METHOD OF ENCODING USING COMPACT SELECTION SIDE INFORMATION 审中-公开
    用于生成频率增强音频信号的解码器，解码方法，编码器以生成编码信号以及使用紧凑选择侧信息进行编码的方法

    公开(公告)号：EP3196878A1

    公开(公告)日：2017-07-26

    申请号：EP17158862.7

    申请日：2014-01-28

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

    发明人： Nagel, Frederik ,  Disch, Sascha ,  Niedermeier, Andreas

    IPC分类号： G10L21/0388 ,  G10L19/002 ,  G10L19/26

    CPC分类号： G10L19/265 ,  G10L19/002 ,  G10L21/0388

    摘要： A decoder for generating a frequency enhanced audio signal (120), comprises: a feature extractor (104) for extracting a feature from a core signal (100); a side information extractor (110) for extracting a selection side information associated with the core signal; a parameter generator (108) for generating a parametric representation for estimating a spectral range of the frequency enhanced audio signal (120) not defined by the core signal (100), wherein the parameter generator (108) is configured to provide a number of parametric representation alternatives (702, 704, 706, 708) in response to the feature (112), and wherein the parameter generator (108) is configured to select one of the parametric representation alternatives as the parametric representation in response to the selection side information (712 to 718); and a signal estimator (118) for estimating the frequency enhanced audio signal (120) using the parametric representation selected.

    摘要翻译： 一种用于生成频率增强音频信号（120）的解码器，包括：特征提取器（104），用于从核心信号（100）提取特征; 边信息提取器（110），用于提取与核心信号相关联的选择侧信息; 参数生成器（108），用于生成用于估计未被所述核心信号（100）定义的所述频率增强音频信号（120）的频谱范围的参数表示，其中所述参数生成器（108）被配置为提供多个参数 响应于所述特征（112）的表示替换（702,704,706,708），并且其中所述参数生成器（108）被配置为响应于所述选择侧信息而选择所述参数表示替换中的一个作为所述参数表示 712至718）; 以及信号估计器（118），用于使用所选参数表示来估计频率增强音频信号（120）。

    Apparatus and method for generating a synthesis audio signal and for encoding an audio signal
    5.
    发明公开
    Apparatus and method for generating a synthesis audio signal and for encoding an audio signal 审中-公开
    装置和方法，用于产生合成音频信号和编码音频信号

    公开(公告)号：EP2239732A1

    公开(公告)日：2010-10-13

    申请号：EP09181008.5

    申请日：2009-12-30

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

    发明人： Nagel, Frederik ,  Multrus, Markus ,  Lecomte, Jérémie ,  Bayer, Stefan ,  Fuchs, Guillaume ,  Hilpert,Johannes ,  Robilliard, Julien

    IPC分类号： G10L21/02 ,  G10L19/14

    CPC分类号： G10L19/008 ,  G10L19/18 ,  G10L21/038

    摘要： An apparatus for generating a synthesis audio signal using a patching control signal comprises a first converter, a spectral domain patch generator, a high frequency reconstruction manipulator and a combiner. The first converter is configured for converting a time portion of an audio signal into a spectral representation. The spectral domain patch generator is configured for performing a plurality of different spectral domain patching algorithms, wherein each patching algorithm generates a modified spectral representation comprising spectral components in an upper frequency band derived from corresponding spectral components in a core frequency band of the audio signal. The spectral domain patch generator is furthermore configured to select a first spectral domain patching algorithm from the plurality of patching algorithms for a first time portion and a second spectral domain patching algorithm from the plurality of patching algorithm for a second different time portion in accordance with the patching control signal to obtain the modified spectral representation. The high frequency reconstruction manipulator is configured for manipulating the modified spectral representation or a signal derived from the modified spectral representation in accordance with a spectral band replication parameter to obtain a bandwidth extended signal. Finally, the combiner is configured for combining the audio signal having spectral components in the core frequency band or a signal derived from the audio signal with the bandwidth extended signal to obtain the synthesis audio signal.

    摘要翻译： 用于使用修补控制信号产生一合成音频信号的装置包括：第一转换器，一频域修补发生器，一高频重建操纵器和组合器。 所述第一转换器被配置用于音频信号的时间部分转换为一频谱表示。 从在该音频信号的一核心频带对应的光谱分量的频域修补发生器被配置为执行不同的频域修补算法复数，worin每个修补算法基因速率的修改的频谱表示，其包括在上频率在频谱分量频带而得。 该频域修补发生器被进一步配置为选择第一频谱域从修补算法对于第一时间部分和从修补算法的多个A第二频域修补算法中的雅舞的第二不同时间部分的多元性修补算法 修补控制信号以获得所述修改的频谱表示。 该高频重建操控器被配置用于操纵所述修改的频谱表示或自修改的频谱表示在雅舞蹈衍生与频谱带复制参数的信号，以获得带宽扩展信号。 最后，组合器被配置为将具有在核心频带-或从与所述带宽扩展信号以获得合成音频信号的音频信号导出的信号的频谱分量的音频信号。

    Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program
    7.
    发明公开
    Audio decoder, audio encoder, methods for decoding and encoding an audio signal and computer program 有权
    Audiodekodierer，Verfahren zum Dekodieren eines Audiosignals und Computerprogramm

    公开(公告)号：EP2214164A2

    公开(公告)日：2010-08-04

    申请号：EP10152001.3

    申请日：2010-01-28

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

    发明人： Neuendorf, Max ,  Lecomte, Jérémie ,  Multrus, Markus ,  Bayer, Stefan ,  Nagel, Frederik ,  Fuchs, Guillaume ,  Robilliard, Julien ,  Rettelbach, Nikolaus ,  Geiger, Ralf ,  Grill, Bernhard

    IPC分类号： G10L19/02 ,  G10L19/14

    CPC分类号： G10L19/022 ,  G10L19/20

    摘要： An audio decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a linear-prediction-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of linear-prediction domain parameters associated with the audio frame and a frequency-domain decoder core configured to provide a time-domain representation of an audio frame on the basis of a set of frequency-domain parameters, taking into account a transform window out of a set comprising a plurality of different transform windows. The audio decoder comprises a signal combiner configured to overlap-and-add-time-domain representations of subsequent audio frames encoded in different domains, in order to smoothen a transition between the time-domain representations of the subsequent frames. The set of transform windows comprises one or more windows specifically adapted for a transition between a frequency-domain core mode and a linear-prediction-domain core mode.

    摘要翻译： 一种音频解码器，用于基于音频内容的经编码的表示来提供音频内容的解码表示，包括：线性预测域解码器核心，被配置为基于设置提供音频帧的时域表示 与所述音频帧相关联的线性预测域参数以及被配置为基于一组频域参数提供音频帧的时域表示的频域解码器核心，考虑到从 一组包括多个不同的变换窗口。 音频解码器包括信号组合器，其被配置为对在不同域中编码的后续音频帧进行重叠和加时域表示，以平滑后续帧的时域表示之间的转换。 变换窗口集合包括一个或多个窗口，其特别适用于频域核心模式和线性预测域核心模式之间的转换。

    Apparatus and method for generating a bandwidth extended signal from a bandwidth limited audio signal
    10.
    发明公开
    Apparatus and method for generating a bandwidth extended signal from a bandwidth limited audio signal 审中-公开
    装置和方法用于从与有限带宽的音频信号生成带宽扩展信号

    公开(公告)号：EP2709106A1

    公开(公告)日：2014-03-19

    申请号：EP12184706.5

    申请日：2012-09-17

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

    发明人： Nagel, Frederik ,  Wilde, Stephan

    IPC分类号： G10L21/038

    CPC分类号： G10L19/00 ,  G10L19/008 ,  G10L19/0208 ,  G10L19/025 ,  G10L21/038

    摘要： An apparatus (100) for generating a bandwidth extended signal (135) from a bandwidth limited audio signal (105), the bandwidth limited audio signal (105) comprising a plurality of consecutive bandwidth limited time blocks (511), each bandwidth limited time block having at least one associated spectral band replication parameter comprising a core frequency band and the bandwidth extended signal (135) comprising a plurality of consecutive bandwidth extended time blocks (513), comprises a patch generator (110), a signal manipulator (120) and a combiner (130). The patch generator (110) is configured for generating a patched signal (115) comprising an upper frequency band using a bandwidth limited time block of the bandwidth limited audio signal (105). The patch generator (110) is configured to perform a harmonic patching algorithm (515) to obtain the patched signal (115). The patch generator (110) is configured to perform the harmonic patching algorithm (515) for a current bandwidth extended time block (m') of the plurality of consecutive bandwidth extended time blocks (513) using a timely preceding bandwidth limited time block (m - 1) of the plurality of consecutive bandwidth limited time blocks (511) of the bandwidth limited audio signal (105). The signal manipulator (120) is configured for manipulating a signal (105) before patching or the patched signal (115) generated using the timely preceding bandwidth limited time block (m - 1) using a spectral band replication parameter (121) associated with a current bandwidth limited time block (m) to obtain a manipulated patched signal (125) comprising the upper frequency band. The timely preceding bandwidth limited time block (m - 1) timely precedes the current bandwidth limited time block (m) in the plurality of consecutive bandwidth limited time blocks (511) of the bandwidth limited audio signal (105). The combiner (130) is configured for combining the bandwidth limited audio signal (105) comprising the core frequency band and the manipulated patched signal (125) comprising the upper frequency band to obtain the bandwidth extended signal (135).

    摘要翻译： 用于从包括连续带宽有限的时间块的多个（511），每个带宽有限的时间块的带宽有限的音频信号（105），所述带宽受限的音频信号（105）生成带宽扩展信号（135）的装置（100） 具有至少一个相关联的频谱带复制参数包括核心频带和包括连续带宽扩展时间块的多个（513）的带宽扩展信号（135）包括补丁生成器（110），信号操纵器（120）和 一个组合器（130）。 补丁生成器（110）被配置用于产生包括上频带-使用有限带宽的音频信号（105）的带宽有限的时间块的修补信号（115）。 补丁生成器（110）被配置为执行一个谐波修补算法（515），以获得修补信号（115）。 补丁生成器（110）被配置为针对当前带宽扩展时间块连续带宽扩展时间块的使用及时preceding-带宽有限的时间块中的多元性（513）的（M“）（米执行谐波修补算法（515） 在带宽受限的音频信号（105）的连续的带宽有限的时间的块（511）的多个1） - 。 所述信号操纵器（120）被配置用于修补或使用及时preceding-带宽有限的时间块产生的修补信号（115）之前操纵信号（105）（M - 1）使用与相关联的（121）的频谱带复制参数 当前带宽有限的时间块（M）以获得包含上限频率带的操纵修补信号（125）。 及时preceding-带宽有限的时间块（M - 1）之前及时在带宽受限的音频信号（105）的连续带宽有限的时间的块（511）的多个当前带宽有限的时间块（M）。 所述组合器（130）被配置用于组合包括所述核心频带-和包含上限频率操纵修补信号（125）的有限带宽的音频信号（105）的带，以获得所述带宽扩展信号（135）。