Font recall system and method of operation

Details Font recall system and method of operation Font recall system and method of operation

1983-04-08

1986-02-04

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5275

Patent

active

045689814

ABSTRACT:
A font recall system stores a font of alpha-numeric characters in a video display format for selective insertion as a caption into a video image. Characters are stored on a video disk in digital pixel form with full dynamic resolution. Low pass filtering is employed to preserve high image quality and eliminate jagged edge aliasing at character boundaries. A first frame store receives selected characters from the video disk through an image size reducer to store the characters at selected display positions with a selected size to form a caption under control of a central processing unit. A keyer receives the caption video data from the first frame store as well as a background image to form a composite image, which is stored in the second frame store before being output as a continuous television video signal.

REFERENCES:
patent: 3465097 (1969-09-01), Brabon et al.
patent: 3532806 (1970-10-01), Wicklund
patent: 4360831 (1982-11-01), Kellar
patent: 4419662 (1983-12-01), Puskas
patent: 4420770 (1983-12-01), Rahman

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