Method and system for processing subband signals using adaptive filters
    1.
    发明授权
    Method and system for processing subband signals using adaptive filters 有权
    使用自适应滤波器处理子带信号的方法和系统

    公开(公告)号:US07783032B2

    公开(公告)日:2010-08-24

    申请号:US10642847

    申请日:2003-08-18

    IPC分类号: H04M9/08

    摘要: A method and system for processing subband signals using adaptive filters is provided. The system is implemented on an oversampled WOLA filterbank. Inputs signals are oversampled. The system includes an adaptive filter for each subband, and the functionality of improving the convergence properties of the adaptive filter. For example, the convergence property is improved by whitening the spectra of the oversampled subband signals and/or affine projection algorithm. The system is applicable to echo and/or noise cancellation. Adaptive step size control, adaptation process control using Double-Talk detector may be implemented. The system may further implement a non-adaptive processing for reducing uncorrelated noise and/or cross-talk resistant adaptive noise cancellation.

    摘要翻译: 提供了一种使用自适应滤波器处理子带信号的方法和系统。 该系统在过采样的WOLA滤波器组上实现。 输入信号被过采样。 该系统包括用于每个子带的自适应滤波器,以及改善自适应滤波器的收敛特性的功能。 例如,通过使过采样子带信号和/或仿射投影算法的光谱变白来改善收敛特性。 该系统适用于回波和/或噪声消除。 可以实现自适应步长控制,使用双向探测器的适应过程控制。 该系统可以进一步实现用于减少不相关噪声和/或抗串扰抗拒自适应噪声消除的非自适应处理。