Apparatus for converting an RGB signal into a composite video si

Details Apparatus for converting an RGB signal into a composite video si Apparatus for converting an RGB signal into a composite video si

1991-02-27

1992-06-02

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340720, 358 31, G09G 128

Patent

active

051190745

ABSTRACT:
A circuit for converting RGB to composite video. The circuit is particularly useful in a video overlay application. Notch filters are used both in the video path and keying path. The notch filters are centered at frequenices equal to the dot clock frequency of the RGB divided by integers where the result of this division falls within the chroma subcarrier spectrum.

REFERENCES:
patent: 4344075 (1982-08-01), Rudy
patent: 4425581 (1984-01-01), Schweppe et al.
patent: 4442428 (1984-04-01), Dean et al.
patent: 4642682 (1987-02-01), Osburn et al.
patent: 4800432 (1989-01-01), Barnett et al.

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