Noise eliminative circuit employing a coring circuit
AssigneeSamsung Electronics Co., Ltd.
InventorKim Jeong-Hun
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Abstract
A noise eliminative circuit for eliminating noise components contained in an input image signal in which a high-frequency noise component is eliminated through a coring circuit, and a low-frequency noise component is selectively eliminated by horizontal and vertical correlation, without a damage to the input image signal. A coring circuit is employed for a horizontal high-frequency component of an image signal to remove a minute noise component, and an impulse noise elimination method is applied to a remaining component of the image signal to eliminate the noise component which is also removed in accordance with a user's selection of the high-frequency band.
Claims7
A noise eliminative circuit comprising:
- a plurality of high pass filters having different cut-off frequencies, respectively, for passing high-frequency components of an input image signal;
- a multiplexer for selectively outputting one of the input image signal and output signals of the respective high pass filters in accordance with a switch control portion;
- a coring circuit for receiving the selected output signal from the multiplexer and eliminating a minute noise level from the high-frequency component thereof;
- a first adder for removing the selected output signal from the multiplexer from the input image signal;
- an impulse noise eliminating circuit for eliminating an impulse noise from the image signal output from the first adder;
- and
- a second adder for adding the output signal of the impulse noise eliminating circuit and the output of the coring circuit to obtain an image signal in which noise is eliminated.
Dependencies are inferred from the claim text.