Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1992-11-27
1995-07-25
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358340, 358312, H04N 594, H04N 5783
Patent
active
054367298
ABSTRACT:
A video signal processing apparatus with an automatic picture quality control function comprises a reproduction unit for reproducing a video signal from a video signal recording medium, an APL detector and a noise detector for detecting as a DC potential signal two different pieces of information affecting the picture quality contained in the video signal reproduced by the reproduction unit, a DC potential shift circuit for shifting the smaller of the two DC potential signals detected by the detectors in accordance with the reproduction mode of the reproduction apparatus, an input terminal for inputting a variable DC potential, a switching unit for selecting the output of the DC potential shift circuit or the input from the input terminal, and a picture quality control circuit for controlling the picture quality of the video signal reproduced at the reproduction apparatus by the DC potential from the switching unit.
REFERENCES:
patent: 5223927 (1993-06-01), Kageyama et al.
patent: 5223947 (1993-06-01), Morikawa
patent: 5249064 (1993-09-01), Minakawa
Moro Eiji
Ozaki Yukihiko
Chin Tommy P.
Hitachi , Ltd.
Nguyen Huy
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