Color sign inserting circuit for video signal reproducing system

Details Color sign inserting circuit for video signal reproducing system Color sign inserting circuit for video signal reproducing system

1983-01-20

1985-12-24

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358326, H04N 9535

Patent

active

045610134

ABSTRACT:
A color sign inserting circuit for a video signal reproducing system is disclosed, which comprises a the color burst detecting circuit for extracting color burst from a video signal detected from a recording system, a flywheel oscillator locked to the average values of the frequency and phase of a color burst signal extracted from the color burst detecting circuit for detecting time axis variation components, a phase shifter for controlling the phase of the clock output of the flywheel oscillator, and a sign inserting circuit for superimposing the output of the phase shifter and a sign signal on the video signal. Display of an inserted sign in color in the reproduction of video thus can be realized by merely adding an inexpensive color signal shifter to the conventional functions necessary for the video signal processing.

REFERENCES:
patent: 3647942 (1972-03-01), Siegel

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