Video color generator circuit for computer

Details Video color generator circuit for computer Video color generator circuit for computer

1983-07-08

1986-03-25

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340701, 358 27, 358903, G09G 128

Patent

active

045786739

ABSTRACT:
A color video generator for use with a digital computer and a color video display. The computer produces digital data signals, each of which is composed of plural bits which represent a color to be produced. The color video generator produces a color in a portion of the display in response to receipt of an associated one of the first data signals. The color is preselectable. The video generation means operates on a color subcarrier signal composed of three primary color signals and comprises a data code translator having an addressable memory and a video phase modulator having an addressable memory. The translator is responsive to said first data signals for providing second, plural bit digital signals to the phase modulator. The phase modulator operates in synchronism with a phase demodulator in the display and is responsive to receipt of respective ones of the second digital signals. The video generator provides respective output signals during successive portions of one cycle of the color subcarrier signal. Each of the output signals is representative of one of at least three predetermined different amounts of the primary color signals present in that portion of the cycle of the color subcarrier signal as preestablished by the contents of its addressable memory. The output signals are arranged for combination with video synchronization signals and a color burst signal to produce a conventional composite video signal.

REFERENCES:
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patent: 4183046 (1980-01-01), Dalke et al.
patent: 4278972 (1981-07-01), Wozniak
patent: 4360804 (1982-11-01), Ohura
patent: 4442428 (1984-04-01), Dean et al.
patent: 4466015 (1984-08-01), Wargo et al.
patent: 4510521 (1985-04-01), Ruprecht et al.

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