2-line YC separation device

Details 2-line YC separation device 2-line YC separation device

1997-10-31

1999-10-19

Flynn, Nathan

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348665, 348667, 348668, H04N 977, H04N 978

Patent

active

059697717

ABSTRACT:
A 2-line YC separation device comprising a delay circuit for delaying a composite input video signal for a horizontal scanning period; a first band-pass filter which receives the composite input video signal; a second band-pass filter which receives the output signal of the delay circuit; a Y-correlation detector which receives the output signal of the band-pass filter; a C-correlation detector which receives the output signal of the band-pass filter; a difference detector for detecting a Y signal differential value; a YL-correlation detector for detecting a Y signal correlation; and an AND circuit for logically ANDing the output signals of the YL-correlation detector and the Y-correlation detector.

REFERENCES:
patent: 4600937 (1986-07-01), Kudo et al.
patent: 4994906 (1991-02-01), Moriwake
patent: 5786872 (1998-07-01), Miyazaki et al.

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