Y/C separation with 3D comb filter

Details Y/C separation with 3D comb filter Y/C separation with 3D comb filter

2005-12-12

2009-06-09

Yenke, Brian P (Department: 2622)

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

C348S609000, C348S665000, C348S667000, C348S668000, C348S670000

Reexamination Certificate

active

07545442

ABSTRACT:
The present invention uses a 2D comb filter20to output a 2D chrominance signal C2dby comparing the current scan-line signals with the signals before and after the current scan-line signals. A 3D chrominance signal C3dis then acquired by directly subtracting two adjacent 2D image signals and then dividing by 2 to get an approximate chrominance signal C3dof the two 2D images. Ratio mixing is performed on the 2D chrominance signal C2dand the 3D chrominance signal C3dto output a near-actual chrominance signal. A chrominance variation value can be acquired by comparing the chrominance signals of the two adjacent images. Finally, an actual luminance signal of the current scan-line is separated by deducting the near-actual chrominance signal from the signals of the current scan-line to restore the luminance signal.

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