On-screen information superimposing circuit

Details On-screen information superimposing circuit On-screen information superimposing circuit

1992-08-28

1994-10-18

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Special effects

348569, H04N 974

Patent

active

053572866

ABSTRACT:
An on-screen information superimposing circuit including an A/D converter for converting color signals and a luminance signal output from a video signal source into digital signals, an on-screen information generator for detecting on-screen information signal made of the color signals according to the luminance signal output from the A/D converter, storing the on-screen information, and outputting the stored color signals according to a read control signal, and a D/A converter for converting the on-screen information output from the on-screen information generator into an analog signal so as to be superimposed on another signal output from the video signal source, so as to reproduce the color signal of the on-screen information using the original color signal.

REFERENCES:
patent: 4777531 (1988-10-01), Hakamada et al.
patent: 4811085 (1989-03-01), Idei et al.
patent: 4855833 (1989-08-01), Kageyama et al.
patent: 5012328 (1991-04-01), Ishiguro

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