Noise filtering
First Claim
Patent Images
1. A motion-dependent method of filtering noise, the method comprising the steps of:
- determining (5-13) a local characteristic in an image signal;
determining (5, 21,
23) a global amount of motion in the image signal; and
combining (1) a received image signal and a delayed (3) image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal.
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Abstract
In a motion-dependent noise filtering (MD, NRF), a received image signal and a delayed (3) image signal are combined in dependence upon both a local amount of motion and a global amount of motion in the image signals.
28 Citations
13 Claims
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1. A motion-dependent method of filtering noise, the method comprising the steps of:
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determining (5-13) a local characteristic in an image signal; determining (5, 21,
23) a global amount of motion in the image signal; andcombining (1) a received image signal and a delayed (3) image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A motion-dependent noise filtering circuit (MD, NRF), comprising:
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means (5-13) for determining a local characteristic in an image signal; means (5, 21,
23) for determining a global amount of motion in the image signal; andmeans (1) for combining a received image signal and a delayed image signal in dependence upon both (25) said local characteristic and said global amount of motion in the image signal, to obtain a noise filtered signal. - View Dependent Claims (11, 12, 13)
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Specification