Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Reexamination Certificate
2008-06-03
2008-06-03
Kostak, Victor R. (Department: 2622)
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
C348S678000, C348S672000
Reexamination Certificate
active
07382414
ABSTRACT:
A video signal processing apparatus includes a characteristic detection circuit for detecting luminance distribution corresponding to one frame of a video signal, a contrast compensation circuit for compensating contrast of the video signal, an edge compensation circuit for compensating an edge portion of the video signal, and a control circuit for determining a luminance range to be controlled on the basis of the luminance distribution detected by the characteristic detection circuit, and controlling the contrast compensation circuit and edge compensation circuit to conduct predetermined compensation on the video signal belonging to the luminance range. The control circuit controls the contrast compensation circuit to increase contrast for the video signal in the luminance range as compared with the video signal in other regions, and controls the edge compensation circuit to make an edge compensation quantity for the video signal in the luminance range smaller as compared with other regions.
REFERENCES:
patent: 5224177 (1993-06-01), Doi et al.
patent: 5271064 (1993-12-01), Dhawan et al.
patent: 5867610 (1999-02-01), Lee
patent: 6040860 (2000-03-01), Tamura et al.
patent: 6118886 (2000-09-01), Baumgart et al.
patent: 6118907 (2000-09-01), Matama
patent: 6137899 (2000-10-01), Lee et al.
patent: 6989858 (2006-01-01), Kinjo
patent: 7158107 (2007-01-01), Kawabe et al.
patent: 2002/0027618 (2002-03-01), Stessen et al.
patent: 5-56308 (1993-03-01), None
patent: 8-056316 (1996-02-01), None
patent: 8-107519 (1996-04-01), None
patent: 9-233342 (1997-09-01), None
patent: 2000-152033 (2000-05-01), None
patent: 3215400 (2001-07-01), None
Japanese Office Action, with English Translation, issued in Japanese Patent Application No. 2003-411178, dated on Dec. 25, 2007.
Matono Takaaki
Nakajima Mitsuo
Takata Haruki
Tsuru Yasutaka
Hitachi , Ltd.
Kostak Victor R.
McDermott Will & Emery LLP
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