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    APPARATUS AND METHOD FOR PROCESSING AN INPUT AUDIO SIGNAL USING CASCADED FILTERBANKS
    3.
    发明公开
    APPARATUS AND METHOD FOR PROCESSING AN INPUT AUDIO SIGNAL USING CASCADED FILTERBANKS 审中-公开

    公开(公告)号：EP3570278A1

    公开(公告)日：2019-11-20

    申请号：EP19179788.5

    申请日：2011-03-04

    申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V. ,  Dolby International AB

    发明人： VILLEMOES, Lars ,  EKSTRAND, Per ,  DISCH, Sascha ,  NAGEL, Frederik ,  WILDE, Stephan

    IPC分类号： G10L19/02 ,  G10L21/04 ,  G10L21/038

    摘要： An apparatus for processing an input audio signal (2300) relies on a cascade of filterbanks, the cascade comprising a synthesis filterbank (2304) for synthesizing an audio intermediate signal (2306) from the input audio signal (2300), the input audio signal being represented by a plurality of first subband signals (2303) generated by an analysis filterbank (2302), wherein a number of filterbank channels of the synthesis filterbank (2304) is smaller than a number of channels of the analysis filterbank (2302). The apparatus furthermore comprises a further analysis filterbank (2307) for generating a plurality of second subband signals (2308) from the audio intermediate signal (2306), wherein the further analysis filterbank has a number of channels being different from the number of channels of the synthesis filterbank (2304), so that a sampling rate of a subband signal of the plurality of second subband signals (2308) is different from a sampling rate of a first subband signal of the plurality of first subband signals (2303).

    APPARATUS AND METHOD FOR GENERATING AN ENHANCED SIGNAL USING INDEPENDENT NOISE-FILLING
    7.
    发明公开
    APPARATUS AND METHOD FOR GENERATING AN ENHANCED SIGNAL USING INDEPENDENT NOISE-FILLING 审中-公开
    使用独立的噪声填充产生增强信号的装置和方法

    公开(公告)号：EP3186807A1

    公开(公告)日：2017-07-05

    申请号：EP15741558.9

    申请日：2015-07-24

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

    发明人： DISCH, Sascha ,  GEIGER, Ralf ,  NIEDERMEIER, Andreas ,  NEUSINGER, Matthias ,  SCHMIDT, Konstantin ,  WILDE, Stephan ,  SCHUBERT, Benjamin ,  NEUKAM, Christian

    IPC分类号： G10L19/028 ,  G10L21/038

    CPC分类号： G10L19/028 ,  G10L19/0204 ,  G10L21/038 ,  G10L25/21

    摘要： An apparatus for generating an enhanced signal from an input signal (600), wherein the enhanced signal has spectral values for an enhancement spectral region, the spectral values for the enhancement spectral regions not being contained in the input signal (600), comprises a mapper (602) for mapping a source spectral region of the input signal to a target region in the enhancement spectral region, the source spectral region comprising a noise-filling region (302); and a noise filler (604) configured for generating first noise values for the noise-filling region (302) in the source spectral region of the input signal and for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from the first noise values or for generating second noise values for a noise region in the target region, wherein the second noise values are decorrelated from first noise values in the source region.

    摘要翻译： 一种用于从输入信号（600）生成增强信号的装置，其中增强信号具有增强谱区域的谱值，增强谱区域的谱值不包含在输入信号（600）中，包括映射器 （602），用于将所述输入信号的源谱区域映射到所述增强谱区域中的目标区域，所述源谱区域包括噪声填充区域（302）; 以及噪声填充器（604），其被配置用于为所述输入信号的所述源谱区中的所述噪声填充区域（302）生成第一噪声值并且用于生成所述目标区域中的噪声区域的第二噪声值，其中，所述第二噪声 值与第一噪声值解相关或用于生成目标区域中的噪声区域的第二噪声值，其中第二噪声值与源区域中的第一噪声值解相关。