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US 6,687,669 B1Granted
Method of reducing voice signal interference
OwnerPeter Schrögmeier, Tim Haulick +1inventors
InventorsPeter Schrögmeier, Tim Haulick, Klaus Linhard
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Abstract
In a method for reducing interferences in a voice signal, a noise reduction method is applied to the voice signal, and spectral psychoacoustic masking is taken into account. A spectral masking curve is determined both for the input signal and the output signal of the noise reduction method. By comparing the signal portions exceeding the respective masking curve, newly-audible portions are detected in the form of interference in the output signal and subsequently damped selectively.
Claims9
A method for reducing interferences in a voice signal, the method comprising:
- applying a noise reduction method to the voice signal;
- taking into account spectral psychoacoustic masking;
- determining a first spectral masking curve for an input signal of the noise reduction method;
- determining a second spectral masking curve for an output signal of the noise reduction method;
- identifying newly audible portions of the output signal by comparing signal portions of the output signal which exceed the second spectral masking curve with signal portions of the input signal that exceed the first spectral masking curve;
- and
- selectively damping the identified newly audible portions of the output signal.
4 more elements
Dependencies are inferred from the claim text.