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    • 1. 发明申请
    • APPARATUS AND METHOD FOR MODIFYING AN INPUT AUDIO SIGNAL
    • 用于修改输入音频信号的装置和方法
    • US20130046546A1
    • 2013-02-21
    • US13654790
    • 2012-10-18
    • Christian UHLEJuergen HERREOliver HELLMUTHStefan FINAUER
    • Christian UHLEJuergen HERREOliver HELLMUTHStefan FINAUER
    • G10L19/00
    • G10L21/00G10L21/0264G10L21/0364G10L25/69H03G9/005H03G9/025
    • An apparatus for modifying an input audio signal has an excitation determiner, a storage device and a signal modifier. The excitation determiner determines a value of an excitation parameter of a subband of a plurality of subbands of the input audio signal based on an energy content of the subband. Further, the storage device stores a lookup table containing a plurality of spectral weighting factors. A spectral weighting factor of the plurality of spectral weighting factors is associated to a predefined value of the excitation parameter and a subband of the plurality of subbands. The storage device provides a spectral weighting factor corresponding to the determined value of the excitation parameter and corresponding to the subband, the value of the excitation parameter is determined for. Further, the signal modifier modifies a content of the subband of the audio signal, the value of the excitation parameter is determined for, based on the provided spectral weighting factor to provide a modified subband.
    • 用于修改输入音频信号的装置具有激励确定器,存储装置和信号修改器。 激励确定器基于子带的能量含量来确定输入音频信号的多个子带的子带的激励参数的值。 此外,存储装置存储包含多个频谱加权因子的查找表。 多个频谱加权因子的频谱加权因子与激励参数的预定义值和多个子带中的子带相关联。 存储装置提供对应于确定的激励参数值并对应于子带的频谱加权因子,确定激励参数的值。 此外,信号修改器修改音频信号的子带的内容,基于所提供的频谱加权因子来确定激励参数的值以提供修改的子带。