Television – Image signal processing circuitry specific to television – Color killer
Reexamination Certificate
2008-10-10
2011-12-20
Harold, Jefferey (Department: 2422)
Television
Image signal processing circuitry specific to television
Color killer
C348S644000, C348S645000, C348S647000, C348S648000
Reexamination Certificate
active
08081260
ABSTRACT:
There is provided a color killer circuit comprising a burst amplitude detection unit that detects an amplitude of a color burst; a delay unit that stores, delays, by a predetermined period of time, and outputs the detected amplitude; a subtractor that calculates a difference between an output from the burst amplitude detection unit and an output from the delay unit; a first comparator that compares the output from the burst amplitude detection unit with a first threshold value to determine whether or not the output from the burst amplitude detection unit is less than the first threshold value; and a second comparator that compares an output from the subtractor with a second threshold value to determine whether or not the output from the subtractor is greater than the second threshold value, wherein the color killer circuit masks the color component of the composite video signal when the first comparator determines that the output from the burst amplitude detection unit is less than the first threshold value, or when the second comparator determines that the output from the subtractor is greater than the second threshold value.
REFERENCES:
patent: 11-308632 (1999-11-01), None
esp@cenet patent abstract for Japanese Publication No. 11308632, Publication date Nov. 5, 1999 (1 page).
Ebinuma Hiroyuki
Sakyo Chikara
Harold Jefferey
Khalid Omer
Osha • Liang LLP
Sanyo Electric Co,. Ltd.
Sanyo Semiconductor Co. Ltd.
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