Television system having an ultrablack video signal blanking lev

Details Television system having an ultrablack video signal blanking lev Television system having an ultrablack video signal blanking lev

1991-05-06

1993-04-27

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358183, 358 22, 358165, H04N 514

Patent

active

052067289

ABSTRACT:
An arrangement for displaying characters and/or graphics on the screen of a television system including a brightness control section for controlling the black level of video images includes a character blanking section for blanking behind the video image so as to make the characters and/or graphics more visible. The character blanking section is coupled to the brightness control section for generating an "ultra-black" character blanking level which tracks, but is slightly greater (in the black direction) than the black level for the video image.

REFERENCES:
patent: 3602646 (1971-08-01), Goldberg
patent: 4197557 (1980-04-01), Tuma et al.
patent: 4218698 (1980-08-01), Bart et al.
patent: 4405946 (1983-09-01), Knight
patent: 4760391 (1988-07-01), Gries
Data Sheet for M52041SP.

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