Character and pattern mixing apparatus for use in a video equipm

Television – Basic receiver with additional function – For display of additional information

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Details

348511, 348569, 348584, 348589, 348600, 348659, 345141, H04N 5262, H04N 5272, H04N 5265, H04N 5445

Patent

active

054990548

ABSTRACT:
A video mixing apparatus for use in a video equipment capable of providing a mixed image luminance signal comprises a synchronization ("sync") separator for providing a horizontal sync, vertical sync and composite sync signals from an input image luminance signal; a character/pattern controller, in response to the horizontal and vertical sync signals, for generating a character luminance and a pattern luminance signals; a character mixer for mixing the composite sync signal with the character luminance signal to produce a mixed character signal; a pattern mixer for mixing the composite sync signal with the pattern luminance signal to produce a mixed pattern signal; and switching apparatus for mixing the mixed character signal and the mixed pattern signal with the image luminance signal to thereby provide the mixed image luminance signal.

REFERENCES:
patent: 4450442 (1984-05-01), Tanaka
patent: 4580165 (1986-04-01), Patton et al.
patent: 5161236 (1992-11-01), Nakayama et al.
patent: 5185603 (1993-02-01), Medin
patent: 5185665 (1993-02-01), Okura et al.

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