METHOD AND APPARATUS FOR CROSS-TALK RESISTANT ADAPTIVE NOISE CANCELLER

摘要

A method and apparatus for cross-talk resistant adaptive noise cancellation. The method includes retrieving, via the processor, a primary signal and a reference signal, filtering the primary signal utilizing a filter H₁₂(z) and estimating a cross-talk, filtering the reference signal utilizing a filter H₂₁(z) and estimating the noise leakage of the reference signal, determining the difference between the noise leakage estimate from the primary signal and estimating a first post-filtering, determining the difference between the cross-talk estimate and the reference signal and estimating a second post-filtering, determining if the voice activity is detected in the primary signal, adapting filters H₁₂ and H₂₁ by de-correlation if the voice activity is detected, and adapting filter H₁₂ by NLMS if the voice activity is not detected, limiting maximum filter change during different conditions for protecting filters H₁₂ and H₂₁ from diverging, maintaining filter stability by tracking absolute sum of the coefficients of the convolution of H₁₂ and H₂₁, obtaining a primary output and a reference output utilizing the first post-filtering and the second post-filtering, and utilizing the primary output and the reference output for cross-talk resistant adaptive noise cancellation.