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公开(公告)号：EP2458587A1
公开(公告)日：2012-05-30
申请号：EP11009360.6
申请日：2011-11-25
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L2021/02085 , G10L2021/02163
摘要： An audio processing apparatus generates a suppression coefficient sequence that is composed of coefficient values corresponding to frequency components of an audio signal, the frequency components being multiplied by the corresponding coefficient values to suppress noise components of the audio signal. In the audio processing apparatus, a characteristic value calculation unit calculates a noise characteristic value depending on a shape of a magnitude distribution of the audio signal. An intensity setting unit variably sets a suppression intensity of the noise components based on the noise characteristic value. A coefficient sequence generation unit generates the suppression coefficient sequence based on the audio signal and the suppression intensity.
摘要翻译： 音频处理装置生成由与音频信号的频率分量对应的系数值组成的抑制系数序列，频率分量乘以相应的系数值，以抑制音频信号的噪声分量。 在音频处理装置中，特征值计算单元根据音频信号的幅度分布的形状来计算噪声特性值。 强度设定单元根据噪声特性值可变地设定噪声成分的抑制强度。 系数序列生成单元基于音频信号和抑制强度生成抑制系数序列。
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公开(公告)号：EP2144233A3
公开(公告)日：2013-09-11
申请号：EP09164896.4
申请日：2009-07-08
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L21/0232
摘要： A noise suppression estimation device calculates a noise index value which varies according to kurtosis of a frequence distribution of magnitude of a sound signal before or after suppression of the noise component, the noise index value indicating a degree of occurrence of musical noise after suppression of the noise component in a frequency domain. For example, the noise suppression estimation device calculates first kurtosis of a frequence distribution of magnitude of the sound signal before suppression of the noise component, calculates second kurtosis of a frequence distribution of magnitude of the sound signal after suppression of the noise component, and calculates the noise index value from the first kurtosis and the second kurtosis.
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