Device for transparently displaying characters in a video system

Television – Image signal processing circuitry specific to television – Special effects

Patent

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Details

348600, H04N 976, H04N 5265

Patent

active

056026005

ABSTRACT:
A device for displaying characters in a video system, the characters being able to be displayed transparently against a background consisting of the normal television image. The device inserts the text into the original video signal, then forms the weighted average of the signal including the text and the original video signal.

REFERENCES:
patent: 3604849 (1971-09-01), Skrydstrup
patent: 3898377 (1975-08-01), Fairbairn et al.
patent: 4591897 (1986-05-01), Edelson
patent: 4675737 (1987-06-01), Fujino et al.
patent: 4680622 (1987-07-01), Barnes et al.
patent: 4812909 (1989-03-01), Yokobayashi et al.
patent: 4908699 (1990-03-01), Chaplin et al.
patent: 5128765 (1992-07-01), Dingwall et al.
Webster, William M., "Simultaneous Television and Computer Image Display", Technical Notes, TN No.: 1374, mailed Apr. 24, 1986, pp. 1-2.

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