Video signal reproducing apparatus having setup level eliminatio

Facsimile and static presentation processing – Facsimile – Recording apparatus

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358171, H04N 594

Patent

active

049774603

ABSTRACT:
The present invention provides a video signal reproducing apparatus in which a set-up level of a video signal can be cancelled and the contrast of the signal maintained to obtain an accurately reproduced video signal. The present invention includes a set-up period indication circuit for generating a set-up period indication signal if a video signal with a set-up level exists, a subtraction circuit for subtracting a predetermined set-up level from the video signal containing the set-up level and an amplifier circuit for amplifying the subtracted video signal to a predetermined amplitude so that an accurately reproduced video signal is obtained.

REFERENCES:
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patent: 4199780 (1980-04-01), Taylor
patent: 4598316 (1986-07-01), Rogers, III
patent: 4614981 (1986-09-01), Fukui
patent: 4628362 (1986-12-01), Waehmer
patent: 4665444 (1987-05-01), Van Der Werf
patent: 4691235 (1987-09-01), Okui
patent: 4769726 (1988-09-01), Heitmann
patent: 4805040 (1989-02-01), Oku
Julian L. Bernstein Video Tape Recording, John F. Riber Publisher, Inc., N.Y. 196.
CCIR Report 624 (1974).

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