Television – Image signal processing circuitry specific to television – Transition or edge sharpeners
Patent
1994-04-11
1995-08-29
Groody, James J.
Television
Image signal processing circuitry specific to television
Transition or edge sharpeners
348627, 348712, H04N 5208
Patent
active
054465036
ABSTRACT:
In the digital processing of video signals, a vertical detail enhancement system is provided that has a transfer characteristic with a transitional region between a coring region and an active region split into three steps. The slopes of the first, second and third step regions are 25%, 50% and 75% of the enhancement gain, respectively. The levels of enhancement in the step regions are set at 25%, 50% and 75% of the level of enhancement in the active region. A vertical detail signal is compared with a coring level selected by a coring multiplexer among a plurality of hardcoded coring levels to set a coring point at the transfer characteristic. Then, the vertical detail signal is successively compared with the coring level incremented by the selected widths of the step regions to control a step choice unit defining a required attenuation of the vertical detail signal value. A paring level is selected by a paring multiplexer among a plurality of hardcoded paring levels.
REFERENCES:
patent: 4081836 (1978-03-01), Skinner
patent: 4090217 (1978-05-01), Goyal et al.
patent: 4263616 (1981-04-01), Lee
patent: 4268864 (1981-05-01), Green
patent: 4386434 (1983-05-01), Gibson et al.
patent: 4509080 (1985-04-01), Lagoni et al.
patent: 4536796 (1985-08-01), Harlan
patent: 4558352 (1985-12-01), Sauer
patent: 4571511 (1986-02-01), Dischert et al.
patent: 4825297 (1989-04-01), Fuchsberger et al.
patent: 4855829 (1989-08-01), Kihara
patent: 4899221 (1990-02-01), Miller
patent: 4912551 (1990-05-01), Ozaki
patent: 4997398 (1991-03-01), Glen
patent: 5032909 (1991-07-01), Sato et al.
patent: 5043802 (1991-08-01), Tarumizu et al.
patent: 5146319 (1992-09-01), Engel et al.
patent: 5177600 (1993-01-01), Monta et al.
patent: 5210610 (1993-05-01), Kanashiki et al.
patent: 5220624 (1993-06-01), Sakamoto et al.
patent: 5241372 (1993-08-01), Ohba
patent: 5243427 (1993-09-01), Yu
patent: 5245327 (1993-09-01), Pleva et al.
Groody James J.
Mitsubishi Semiconductor America Inc.
Murrell Jeffrey S.
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