Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-04-26
1990-07-17
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 19, 358111, 358150, H04N 505, H04N 718
Patent
active
049424688
ABSTRACT:
In an image input device, in which an image is photographed by a television camera using a plurality of operational modes having numbers of scanning lines different from each other, a video signal thus obtained is subjected to an analogue to digital conversion and a digital image signal is stored, one of a plurality of sampling clocks obtained by dividing a main clock is selected; the analogue to digital conversion is effected by using the sampling clock thus selected; and at the same time synchronization signals of the horizontal and the vertical scannings of the television camera are formed by counting the selected sampling clock.
REFERENCES:
patent: 3429704 (1969-02-01), Ratliff
patent: 4204225 (1980-05-01), Mistretta
patent: 4709256 (1987-11-01), Lechner
patent: 4860090 (1989-08-01), Murata
patent: 4881124 (1989-11-01), Yokouchi
Huno Takakazu
Koike Kouichi
Onodera Yoichi
Tsuneoka Masayuki
Yokouchi Hisatake
Britton Howard W.
Hitachi Medical Corporation
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