Horizontal contour correction circuit

Details Horizontal contour correction circuit Horizontal contour correction circuit

2007-05-29

2007-05-29

Yenke, Brian P. (Department: 2622)

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

C348S026000, C348S625000, C382S199000, C382S266000

Reexamination Certificate

active

10932570

ABSTRACT:
A horizontal contour correction circuit for correcting a horizontal contour of a video signal to output as a corrected signal, comprising: a delay circuit for outputting video signal values of a video signal at at least three different times either before or after a reference time, the video signal containing video signal values being input in a time serial manner; a plurality of selection circuits each for combining video signal values selected in advance from a group of video signal values output from the delay circuit, and selecting one video signal value from each combination of the video signal values to output; and a switch circuit for selecting one video signal value from among the video signal values output from the plurality of selection circuits. The video signal values before and after the reference time are respectively subtracted from a video signal value at the reference time, whereby horizontal contour of a video signal is corrected.

REFERENCES:
patent: 6320620 (2001-11-01), Markandey et al.
patent: 6359659 (2002-03-01), Suzuki et al.
patent: 6433836 (2002-08-01), Suzuki et al.
patent: 6650792 (2003-11-01), Aida et al.
patent: 6650972 (2003-11-01), Robinson et al.
patent: 6897897 (2005-05-01), Mise et al.
patent: 6909813 (2005-06-01), Amano et al.
patent: 6980258 (2005-12-01), Matsunaga
patent: 2000-59650 (2000-02-01), None
patent: 2000-115584 (2000-04-01), None
English Patent Abstract for 2000-59650 from esp@cenet, published Feb. 25, 2000.
English Patent Abstract for 2000-115584 from esp@cenet, published Apr. 21, 2000.

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