Method and apparatus for reducing or removing click noise
First Claim
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1. A method for detecting and correcting click noise in input signals processed by an FM radio receiver, the method comprising:
- differentiating, with a detector unit, first and second input phase signals;
extracting, with the detector unit, first and second noise signals;
comparing, with the detector unit, a sum of the first and second noise signals with a threshold value;
detecting, with the detector unit, the click noise when the sum exceeds the threshold value;
correcting, with the correction unit, the first input phase signal; and
outputting a differentiated version of the corrected phase signal.
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Abstract
The invention relates to an apparatus and a method for detecting and correcting input signals regarding click noise, using a first detector unit and a second correction unit, the detector unit differentiates the input signal and extracts the noise signal and compares the sum of two noise samples with a threshold value and in case this sum exceeds the threshold value a click is observed, while the correction unit corrects the input signal in the phase domain and differentiates it prior to outputting the corrected signal.
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Citations
9 Claims
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1. A method for detecting and correcting click noise in input signals processed by an FM radio receiver, the method comprising:
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differentiating, with a detector unit, first and second input phase signals; extracting, with the detector unit, first and second noise signals; comparing, with the detector unit, a sum of the first and second noise signals with a threshold value; detecting, with the detector unit, the click noise when the sum exceeds the threshold value; correcting, with the correction unit, the first input phase signal; and outputting a differentiated version of the corrected phase signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus configured to reduce click noise in input phase signals processed by an FM radio receiver, the apparatus comprising:
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a detector unit that is configured to differentiate the first and second input phase signals, extract first and second noise signals, compare a sum of the first and second noise signals with a threshold value, and detect the click noise when this sum exceeds the threshold value; and a correction unit that is configured to correct the first input phase signal and output a differentiated version of the corrected phase signal. - View Dependent Claims (9)
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Specification