Video signal superimposing device

Details Video signal superimposing device Video signal superimposing device

1984-10-01

1987-01-27

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 30, 358183, 340721, H04N 974

Patent

active

046397680

ABSTRACT:
A video signal superimposing device for superimposing and clearly displaying video signals produced from at least two discrete systems includes an input terminal for inputting a color complex video signal, a separation circuit for separating a first brightness signal and a first chroma signal from the color complex video signal, a first generator for generating a second brightness signal, a first mixer circuit for mixing the second brightness signal and the first brightness signal separated by the separation circuit, a second generator for generating a second chroma signal, a second mixer circuit for mixing the second chroma signal and the first chroma signal separated by the separation circuit, and a third mixer circuit for mixing the mixed brightness signal applied from the first mixer circuit and the mixed chroma signal applied to the second mixer circuit.

REFERENCES:
patent: 4161748 (1979-07-01), Heyl
patent: 4425581 (1984-01-01), Schweppe et al.
Jackson and Tan, System Concepts in High Fidelity Television, IEE International Broadcasting Convention, Sep. 18-21, 1982, pp. 135-139.
NHK, A Device for Superimposing Letters on TV Screen, ABU Tech. Review, No. 23 (Japan), Nov. 1972, pp. 13-15.

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