Filter device
AssigneeKoninklijke Philips Electronics N.V.
InventorDirk Piepers
Life of this patent
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Abstract
A filter device (1) is described, comprising a main filter unit (10) such as a 2D comb filter, implemented in hardware, with an input for receiving a video signal (Φ) and an output for providing a filtered video signal (Φ1), a controllable temporal noise reduction unit (20) receiving said filtered video signal (Φ1) from the main filter unit (10), to perform a noise reduction operation on said filtered video signal (Φ1); and a unit (14, 30, 40) for detecting a very low amount of motion in a video image of said first video signal (Φ1) and for controlling the controllable temporal noise reduction unit (20) on the basis of the detected very low amount of motion, so as to enable the filter device (1) to reduce cross-luminance and/or cross-color as well when only a very low amount of motion is present in the signal.
Claims12
A filter device (1), comprising:
- a controllable temporal noise reduction unit (20) having a first input (21) for receiving a first video signal (Φ1), and being adapted to perform a noise reduction operation on said first video signal (Φ1) to provide a filter output signal (Φ3) at a filter output (29);
- and
- adjustment means (14, 30, 40) for detecting a very low amount of motion in a video image of said first video signal (Φ1) and for controlling the controllable temporal noise reduction unit (20) on the basis of the detected very low amount of motion, so as to enable the filter device (1) to reduce cross-luminance and/or cross-color as well when only a very low amount of motion is present in the signal.
A filtering method (1), comprising:
- a controllable temporal noise reduction (20) on a first video signal (Φ1) to provide a filter output signal (Φ3);
- and
- detecting (30) a very low amount of motion in a video image of said first video signal (Φ1);
- and
- controlling (40) the controllable temporal noise reduction (20) on the basis of the detected very low amount of motion, so as to enable a reduction of cross-luminance and/or cross-color as well when only a very low amount of motion is present in the signal.
Dependencies are inferred from the claim text.