Circuit for mixing superimposed video signal and character displ

Details Circuit for mixing superimposed video signal and character displ Circuit for mixing superimposed video signal and character displ

1991-05-22

1993-07-13

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 17, H04N 974

Patent

active

052278689

ABSTRACT:
A circuit for mixing superimposed video signal and character displaying signal comprises a video signal processing unit, superimposed video signal generator, character displaying signal generator, microprocessor, and mixer, wherein the superimposed video signal generator comprises a controller for controlling the input and output signals according to the composite video signal of the video signal processing unit and the control signal of the microprocessor, memory a for storing the superimposed video signal by the output signal of the controller so as to apply desired information to the controller according to the control signal of the microprocessor, chrominance signal generator for receiving the superimposed video signal read out from the memory and color information from the microprocessor through the controller so as to generate the chromiance signal, and luminance signal generator for receiving the output signals of the chrominance signal generator and controller and mixing the superimposed video signal and character displaying signal of the character displaying signal generator, the mixed signal being applied to the mixer.

REFERENCES:
patent: 5031043 (1991-07-01), Rocco et al.

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