Video chroma controller gating chrominance signals by the lumina

Details Video chroma controller gating chrominance signals by the lumina Video chroma controller gating chrominance signals by the lumina

1983-09-22

1986-06-03

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 40, H04N 964

Patent

active

045933103

ABSTRACT:
Color picture resolution is improved in a color television display system by threshold detecting the luminance signal, and, in response to the threshold detected luminance signal, switching the color signals off when the luminance signal is below a predetermined threshold level. Nonlinear amplifiers which couple the color signals to the display system are provided with gain that decreases as signal amplitude increases to restore color signal pulses to a form commensurate with the luminance signal fast rise and fall times.

REFERENCES:
patent: 3778543 (1973-12-01), Lowry
patent: 3968516 (1976-07-01), Dal Santo et al.
patent: 4183051 (1980-01-01), Richman
patent: 4296433 (1981-10-01), Rzeszewski
Alfred Schroeder, "System for Recovering Color Television Signal Fine Detail . . . " RCA Technical Notes, TN 1266, Dec. 1980.

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