Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-02-28
1991-09-24
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358136, 358135, H04N 701
Patent
active
050518267
ABSTRACT:
A vertical edge detection circuit for a progressive scanning conversion circuit including an input circuit for receiving an interlaced scanning television signal, a first circuit for generating an intra-field difference signal from the interlaced scanning television signal, a second circuit for generating an inter-field difference signal from the interlaced scanning television signal and a third circuit for selectively outputting a maximum value one of the intra-field and inter-field difference signals.
REFERENCES:
patent: 4626891 (1986-12-01), Achiha
patent: 4794454 (1988-12-01), Sugiyama
patent: 4811092 (1989-03-01), Achiha
patent: 4885631 (1989-12-01), Fukinuki
patent: 4924305 (1990-05-01), Nakagawa
Ishii Satoyuki
Komatsu Susumu
Britton Howard W.
Hsia Sherrie
Kabushiki Kaisha Toshiba
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