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Noise filtering method in voice communication apparatus, involves controlling overestimation factor and background noise variable in transfer function of wiener filter based on ratio of speech and noise signal
Noise filtering method in voice communication apparatus, involves controlling overestimation factor and background noise variable in transfer function of wiener filter based on ratio of speech and noise signal
The representative noise levels in frequency domain are computed after transforming compressed noisy speech signal of time domain into frequency domain, using which the transfer function of wiener filter (1.1) is calculated. The overestimation factor and background noise variable in the transfer function of wiener filter are controlled based on estimated ratio of speech and noise signal. An Independent claim is also included for noise filtering circuit.
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