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    APPARATUS FOR STEREO FILLING IN MULTICHANNEL CODING
    2.
    发明公开
    APPARATUS FOR STEREO FILLING IN MULTICHANNEL CODING 审中-公开

    公开(公告)号：EP4421803A3

    公开(公告)日：2024-10-30

    申请号：EP24188661.3

    申请日：2017-02-14

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

    发明人： DICK, Sascha ,  HELMRICH, Christian ,  RETTELBACH, Nikolaus ,  SCHUH, Florian ,  FÜG, Richard ,  NAGEL, Frederik

    IPC分类号： G10L19/008 ,  G10L19/028

    摘要： An apparatus for decoding an encoded multichannel signal of a current frame to obtain three or more current audio output channels is provided. A multichannel processor is adapted to select two decoded channels from three or more decoded channels depending on first multichannel parameters. Moreover, the multichannel processor is adapted to generate a first group of two or more processed channels based on said selected channels. A noise filling module is adapted to identify for at least one of the selected channels, one or more frequency bands, within which all spectral lines are quantized to zero, and to generate a mixing channel using, depending on side information, a proper subset of three or more previous audio output channels that have been decoded, and to fill the spectral lines of frequency bands, within which all spectral lines are quantized to zero, with noise generated using spectral lines of the mixing channel.

    APPARATUS AND METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING A TRANSIENT-LOCATION DEPENDENT OVERLAP
    3.
    发明公开
    APPARATUS AND METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING A TRANSIENT-LOCATION DEPENDENT OVERLAP 审中-实审

    公开(公告)号：EP4375996A2

    公开(公告)日：2024-05-29

    申请号：EP24167580.0

    申请日：2014-02-20

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

    发明人： HELMRICH, Christian ,  LECOMTE, Jérémie ,  MARKOVIC, Goran ,  SCHNELL, Markus ,  EDLER, Bernd ,  REUSCHL, Stefan

    IPC分类号： G10L19/02

    CPC分类号： G10L19/022 ,  G10L19/0212

    摘要： A decoder for decoding an audio or image signal comprising a sequence of blocks of converted windowed samples and associated window information (160) identifying a specific window function for a block out of at least three different window functions, comprises: a processor (156) for providing a sequence of blocks of spectral values; a controllable converter (158) for converting the sequence of blocks of spectral values into a time domain representation using an overlap-add processing, wherein the controllable converter (158) is controlled by the window information to apply window functions indicated by the window information to the corresponding block to calculate a decoded audio or image signal, wherein the window is selected from a group of at least three windows comprising a first window (201) having a first overlap length (203), a second window (215) having a second overlap length (218), and a third window (224) having a third overlap length (229) or having no overlap, wherein the first overlap length (203) is greater than the second overlap length (218), and wherein the second overlap length (218) is greater than the third overlap length (229) or greater than an overlap of zero.

    LOW-FREQUENCY EMPHASIS FOR LPC-BASED CODING IN FREQUENCY DOMAIN
    10.
    发明授权
    LOW-FREQUENCY EMPHASIS FOR LPC-BASED CODING IN FREQUENCY DOMAIN 有权
    爱德华兹·贝松

    公开(公告)号：EP2951814B1

    公开(公告)日：2017-05-10

    申请号：EP14701984.8

    申请日：2014-01-28

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

    发明人： DÖHLA, Stefan ,  GRILL, Bernhard ,  HELMRICH, Christian ,  RETTELBACH, Nikolaus

    IPC分类号： G10L19/02 ,  G10L19/26 ,  G10L19/08

    CPC分类号： G10L19/087 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/08 ,  G10L19/16 ,  G10L19/26 ,  G10L19/265

    摘要： The invention provides an audio encoder including a combination of a linear predictive coding filter having a plurality of linear predictive coding coefficients and a time-frequency converter, wherein the combination is configured to filter and to convert a frame of the audio signal into a frequency domain in order to output a spectrum based on the frame and on the linear predictive coding coefficients; a low frequency emphasizer configured to calculate a processed spectrum based on the spectrum, wherein spectral lines of the processed spectrum representing a lower frequency than a reference spectral line are emphasized; and a control device configured to control the calculation of the processed spectrum by the low frequency emphasizer depending on the linear predictive coding coefficients of the linear predictive coding filter.

    摘要翻译： 本发明提供一种音频编码器，其包括具有多个线性预测编码系数的线性预测编码滤波器和时间 - 频率转换器的组合，其中该组合被配置为滤波并将该音频信号的帧转换为频域 以便基于帧和线性预测编码系数输出频谱; 配置为基于频谱计算处理频谱的低频增强器，其中强调表示比参考频谱线更低频率的处理频谱的频谱线; 以及控制装置，被配置为根据线性预测编码滤波器的线性预测编码系数来控制低频增强器对经处理频谱的计算。