Luminance and color signal isolation device

Details Luminance and color signal isolation device Luminance and color signal isolation device

1994-06-10

1996-02-13

Groody, James J.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348665, H04N 978

Patent

active

054915228

ABSTRACT:
A luminance and color signal isolation device having a horizontal nonlinear luminance signal dector which is detecting a luminance signal from a synthesis picture signal as an input without having any change to the horizontal direction; and a vertical nonlinear luminance signal dector which is detecting the luminance signal with the synthesis picture signal as an input without having any change to the vertical direction. A color signal detector detects a color signal from the synthesis picture signal; and a delay device which delays the synthesis picture signal for a certain time in order to be in synchronism with the output signal of the color signal detector. A subtractor subtracts an output signal of the color signal detector from the output signal of the delay device; and a control signal generator detects any change of the synthesis picture signal to the vertical or horizontal direction and also generates control signals of CS11 and CS12. A multiplexer alternatively selects one of the luminance signal among the output signals from the subtractor, the detector of vertical nonlinear luminance signal, and the detector of horizontal nonlinear luminance signal using the control signals of CS11 and CS 12 as the input signals from the control signal generator.

REFERENCES:
patent: 4489346 (1984-12-01), Tanaka et al.
patent: 5249040 (1993-09-01), Sugiyama

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