Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-02-15
1991-03-19
Britton, Howard W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 36, H04N 978
Patent
active
050015532
ABSTRACT:
A luminance signal/color signal separation circuit includes a band-pass filter for picking up a color signal from a composite image signal; a delay circuit for sequentially delaying by one line the color signal picked up by the band-pass filter and obtaining three past, present and future line information; a first operation circuit for outputting a signal which takes a value having a larger absolute value when the past and future line information have the same sign, and takes an algebraic sum of the past and future line information when the past and future line information have different signs; a second operation circuit for outputting a signal which takes a value having a smaller absolute value when the output from the first operation circuit and the present line information have the same sign, and takes a reference value when the output from the first operation circuit and the present line information have different signs; and a third operation circuit for obtaining a color signal by subtracting the output from the second operation circuit from the present line information.
REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4489346 (1984-12-01), Tanaka et al.
patent: 4524382 (1985-06-01), Tanaka et al.
patent: 4851898 (1989-07-01), Asahara
patent: 4916327 (1990-04-01), Matsuo
patent: 4920408 (1990-04-01), Umezawa
Matsuo Yasutoshi
Yamada Hiroshi
Britton Howard W.
Lee Michael
Victor Company of Japan Ltd.
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