Adaptive interchannel discriminitive rescaling filter

A method for filtering an audio signal includes modeling a probability density function (PDF) of a fast Fourier transform (FFT) coefficient of primary and reference channels; maximizing the PDFs to provide a discriminative relevance difference (DRD) between a noise magnitude estimate of the reference channel and a noise magnitude estimate of the primary channel. The primary channel is emphasized when the spectral magnitude of the primary channel is stronger than that of the reference channel; and is deemphasized when the spectral magnitude of the reference channel is stronger than that of theprimary channel. A multiplicative rescaling factor is applied to a gain computed in a prior stage of a speech enhancement filter chain, and gain is directly applied when there is no prior stage. 种用于滤波音频信号的方法，包括建模主信道和参考信道的快速傅立叶变换(FFT)系数的概率密度函数(PDF)；最大化PDF以提供在参考信道的噪声幅度估算与主信道的噪声幅度估算之间的判别相关差异(DRD)。当主信道的频谱幅度比参考信道的频谱幅度强时，强化主信道；并且参考信道的频谱幅度比主信道的频谱幅度强时，削弱主信道。当存在先前阶段时，将乘法再缩放因子应用于在语音增强滤波器链的先前阶段中计算的增益，在不存在前阶段的情况下，直接应用增益。