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    • 20. 发明申请
    • SYSTEMS AND METHODS FOR REDUCING AUDIO NOISE
    • 减少音频噪声的系统和方法
    • WO2006116132A3
    • 2007-04-12
    • PCT/US2006015168
    • 2006-04-21
    • SRS LABS INCYANG JUNOLIVER RICK
    • YANG JUNOLIVER RICK
    • G10L21/02
    • H04M9/08G10L21/0208
    • Various embodiments of systems and methods for reducing audio noise are disclosed. One or more sound components such as noise (154, 156) and network tone (158) can be detected based on power spectrum (152) obtained from a time-domain signal (142). Results of such detection can be used to make decisions (162) in determination of an adjustment spectrum (164, 166) that can be applied to the power spectrum. The adjusted power spectrum can be transformed back into a time-domain signal (172) that substantially removes undesirable noise(s) and/or accounts for known sound components such as the network tone.
    • 公开了用于降低音频噪声的系统和方法的各种实施例。 可以基于从时域信号(142)获得的功率谱(152)来检测诸如噪声(154,156)和网络音调(158)的一个或多个声音分量。 这种检测的结果可以用于在确定可应用于功率谱的调整频谱(164,166)中作出决定(162)。 经调整的功率谱可以被转换成时域信号(172),其基本上消除了诸如网络音调之类的已知声音分量的不需要的噪声和/或计费。