Gradation control apparatus and gradation control method

Television – Image signal processing circuitry specific to television – Transition or edge sharpeners

Reexamination Certificate

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Details

C348S672000, C348S701000, C348S671000, C348S607000, C382S275000, C358S521000, C358S522000

Reexamination Certificate

active

07940333

ABSTRACT:
According to one embodiment, a gradation control apparatus comprises a coring module configured to change the coring amount of a video signal according to the degree of movement of the video signal, a smoothing module configured to perform a gradation smoothing process on the video signal, and a parameter controller configured to obtain a frame difference histogram as the degree of movement of the video signal and change an effect parameter for the gradation smoothing process according to the result of weighting the histogram.

REFERENCES:
patent: 5848181 (1998-12-01), Ogata
patent: 6873441 (2005-03-01), Kuwabara et al.
patent: 7554535 (2009-06-01), Sasaki
patent: 7688385 (2010-03-01), Muto
patent: 2007/0025635 (2007-02-01), Miyazawa
patent: 2008/0152223 (2008-06-01), Maeda
patent: 2008/0152227 (2008-06-01), Miyazawa
patent: 2008/0298685 (2008-12-01), Maeda
patent: 2004-342030 (2004-12-01), None
patent: 2007-53697 (2007-03-01), None
patent: 2008-160417 (2008-07-01), None
patent: 2008-160440 (2008-07-01), None

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