Video signal processing apparatus and video signal...

Details Video signal processing apparatus and video signal... Video signal processing apparatus and video signal...

2006-09-26

2010-11-23

Hsia, Sherrie (Department: 2622)

Television

Image signal processing circuitry specific to television

Gray scale transformation

C348S675000, C348S712000

Reexamination Certificate

active

07839456

ABSTRACT:
According to one embodiment, a video signal processing apparatus includes an acquisition unit to obtain the frequency of each luminance level from the input luminance signal worth of one frame, a frequency conversion unit that logarithmically converts the frequency of each luminance level obtained and adds a preset offset value, a preparation unit that prepares a nonlinear correction processing table to cumulatively add the frequency-converted data and provide nonlinear correction processing for the input luminance signal, and a processor that provides nonlinear correction processing to the input luminance signal in accordance with the prepared nonlinear correction processing table.

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patent: 5673355 (1997-09-01), Strolle et al.
patent: 7420623 (2008-09-01), Nakakuki
patent: 2001/0007599 (2001-07-01), Iguchi et al.
patent: 08-125865 (1996-05-01), None
patent: 2000-123165 (2000-04-01), None
patent: 2000-295477 (2000-10-01), None
patent: 2001-032427 (2004-01-01), None
patent: 2005-086772 (2005-03-01), None

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