Television systems and subsystems therefore

Details Television systems and subsystems therefore Television systems and subsystems therefore

H - Electricity

04

N

350/41

H04N 9/04 (2006.01) H04N 5/44 (2006.01)

Patent

CA 1210853

ABSTRACT TELEVISION SYSTEMS AND SUBSYSTEMS THEREFOR An image is scanned by a color camera (800-808), and the luminance representative signals (e.g. Green) of pairs of adjacent lines are summed and differenced in a processor 861. Color signals R,G,B and the sum signal (GS) are matrixed to form chrominance components and luminance components of a standard composite video signal (e.g. I,Q, YS for NTSC) in a matrix 812. One of the chrominance components (I) is comb filtered (1112) to remove portions of its frequency spectrum. The difference signal (G.DELTA.) is comb filtered (1122) to be inserted (1124) into the removed portions of the chrominance component (Fig 11). The other component (Q) is filtered similarly and a filtered independent signal inserted into it when the rate of change of luminance (G.DELTA.) is large, or alternatively only the independent signal is inserted into the chrominance components when G.DELTA. is large. (Fig 18).

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