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    • 7. 发明申请
    • PERCEPTUALLY WEIGHTED DIGITAL AUDIO LEVEL COMPRESSION
    • 特别加权的数字音频电平压缩
    • US20090116664A1
    • 2009-05-07
    • US11935972
    • 2007-11-06
    • Serge SmirnovJames D. JohnstonChris Messer
    • Serge SmirnovJames D. JohnstonChris Messer
    • H03G7/00
    • H03G7/007H04R3/00
    • The level of an audio signal can be compressed by receiving an input audio signal, determining a measure of loudness of the signal using a perceptually derived filter, determining a target gain amount, determining a current gain amount using piecewise linear attack/release logic, and producing an output audio signal by adjusting the input audio signal by the current gain amount. An audio compression filter for compressing the level of audio can comprise a loudness measuring module configured to determine a measure of loudness using a perceptually derived filter, and a compression module configured to determine a target gain amount, determine a current gain amount using piecewise linear attack/release logic, and adjust an input audio signal by the current gain amount. Audio level compression can be implemented using integer calculations.
    • 可以通过接收输入音频信号来压缩音频信号的电平,使用感知导出的滤波器确定信号的响度度量,确定目标增益量,使用分段线性攻击/释放逻辑确定当前增益量,以及 通过将输入音频信号调整为当前增益量来产生输出音频信号。 用于压缩音频电平的音频压缩滤波器可以包括响度测量模块,其被配置为使用感知导出滤波器来确定响度的度量;以及压缩模块,被配置为确定目标增益量,使用分段线性攻击确定当前增益量 /释放逻辑,并且通过当前增益量调整输入音频信号。 可以使用整数计算来实现音频电平压缩。