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Method and device for dynamic noise-reduction in doubler audio output signals uses adaptive low-pass filters in audio doubler channels for suppressing background noises in audio doubler data and maximum frequency tracking
Method and device for dynamic noise-reduction in doubler audio output signals uses adaptive low-pass filters in audio doubler channels for suppressing background noises in audio doubler data and maximum frequency tracking
A pair of adaptive low-pass filters (32) fit in two audio doubler channels for suppressing background noises in audio doubler data. Low-pass filtering can be performed in a frequency range, i.e. before an IFFT operation (24), or in a time range, i.e. after an IFFT operation. Maximum frequency tracking (18) can be fed to a filter selection block (30) that prescribes filter limits in the low-pass filters.
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