System for displaying computer generated images on a television

Details System for displaying computer generated images on a television System for displaying computer generated images on a television

1995-03-31

1999-04-20

Harvey, David E.

Television

Format

Specified color signal format

348488, 348666, 348552, H04N 1114

Patent

active

058961798

ABSTRACT:
In a graphics card of a computer, a circuit is provided for displaying graphic presentations generated by the card on an external TV set. A TV adapter controls a horizontal state machine of a CRT controller so as to delay generation of CRT timing signals by a time period variable with horizontal lines. As a result, a composite video signal is provided with a time-base variable front porch to simulate VTR video signals. In response to the generated composite video signal, the TV set switches into a VTR mode to disable a comb filter used for separating luminance and chrominance components of a broadcast television signal.

REFERENCES:
patent: 4460918 (1984-07-01), Flesza
patent: 4635099 (1987-01-01), Nicholson et al.
patent: 4644387 (1987-02-01), Bell et al.
patent: 4745478 (1988-05-01), Nakagawa et al.
patent: 5255097 (1993-10-01), Spiero et al.

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