Character signal display for a camcorder using existent synchron

Details Character signal display for a camcorder using existent synchron Character signal display for a camcorder using existent synchron

1994-08-01

1996-03-26

Groody, James J.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348222, 3589091, H04N 5262

Patent

active

055024874

ABSTRACT:
A character signal display for a camcorder includes a character signal generator for providing needed character data responsive to horizontal and vertical sync signals separated from a selected video signal. According to one aspect of the invention, the vertical sync signal is extracted from the selected video signal by a microcomputer while the horizontal sync signal is extracted from the selected video signal using a Hsync signal oscillator associated with an electronic viewfinder. When an external video signal is input, selection between the external video signal and the camera video signal is arbitrary; when the external video signal is not applied, the camera video signal is preferentially selected. According to another aspect of the invention, circuitry associated with the electronic viewfinder can generate both the horizontal and vertical sync signals needed by the character generator. Therefore, the conventional synchronous signal generator and synchronous signal separator can be omitted from the camcorder. As a result, the manufacturing cost can be curtailed while still providing the desired synchronous signals.

REFERENCES:
patent: 4325080 (1982-04-01), Satoh
patent: 4706075 (1987-11-01), Hattori
patent: 5162915 (1992-11-01), Idera

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