Television receiver having character generator with non-line loc

Details Television receiver having character generator with non-line loc Television receiver having character generator with non-line loc

1984-10-31

1986-11-18

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358148, 358149, H04N 504, H04N 5262

Patent

active

046239251

ABSTRACT:
A character generator in a receiver provides a character signal in raster scan form for display with a received video signal. An oscillator, not synchronized with the horizontal synchronizing component of the video signal, supplies a clock signal to the generator for controlling timing of character elements. A control unit provides a control signal representative of a time difference between the clock signal and the horizontal synchronizing component. A delay unit, interposed in the clock signal path, selectively imparts delay to the clock signal in response to the control signal for reducing line-to-line variations in the timing of displayed character elements.

REFERENCES:
patent: 3454719 (1969-07-01), Horstmann
patent: 4281345 (1981-07-01), Warn
patent: 4346407 (1982-08-01), Baer et al.
patent: 4464679 (1984-08-01), Wargo
patent: 4477841 (1981-10-01), Chen et al.
An introduction to the MB88303 Television Display Controller, published by Fujitsu, Ltd., Second English Ed., Nov. 1982.

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