Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1986-06-24
1988-12-13
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358136, 358166, H04N 712, H04N 701, H04N 514
Patent
active
047914874
ABSTRACT:
A picture signal conversion device arranged to obtain an interpolation signal by using a scanning line signal of a first picture signal which has scanning line signals corresponding to a predetermined number of scanning lines within one field period and to convert the first picture signal into a second picture signal which has a greater number of scanning lines than that of the first picture signal comprises: first interpolation signal generating means which generates a first interpolation signal for the present field by using a scanning line signal obtained within the present field; second interpolation signal generating means which generates a second interpolation signal for the present field by using a scanning line signal of another field; output means arranged to detect the correlativity of scanning line signal between fields and to selectively produce, according to the detected correlativity, the first or second interpolation signal generated from the first or second interpolation signal generating means; and detection characteristic control means for controlling the correlativity detecting characteristic of the output means according to the inclination of the correlativity among scanning lines obtained within a predetermined period.
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patent: 4218703 (1980-08-01), Netravali et al.
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patent: 4383272 (1983-05-01), Netravali et al.
patent: 4530004 (1985-07-01), Achiha et al.
patent: 4673978 (1987-06-01), Dischert et al.
patent: 4677483 (1987-06-01), Dischert et al.
Kozuki Susumu
Nakayama Tadayoshi
Sato Chikara
Canon Kabushiki Kaisha
Groody James J.
Peng John K.
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