Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1984-12-10
1989-04-25
Faber, Alan
Facsimile and static presentation processing
Facsimile
Recording apparatus
358330, 358340, H04N 980
Patent
active
048253006
ABSTRACT:
A magnetic video recorder/reproducer includes a modulation circuit (2) for modulating video signals to be of high frequencies. The modulated video signals are supplied to a 0.25H delay circuit (4) and a 0.5H delay circuit (6) by selection switches (31, 32, 51, 52) which are successively switched in synchronization with head switching pulses in a long recording mode, so that the video signals are delayed with delay amounts cycled in four fields as 0 H.fwdarw.0.25 H.fwdarw.0.5 H.fwdarw.0.75 H.fwdarw.0 H. The delayed video signals are demodulated by a demodulation circuit (7) to return to the original frequencies, to be processed in aluminance signal recording processing circuit (8) and a color signal recording processing circuit (9), and the processed signal components are added up in an adder circuit (10). The added-up video signals are amplified by a recording amplifier (11) and supplied to a video head to be recorded in a magnetic tape, whereby H-alignment is achieved.
REFERENCES:
patent: 3796825 (1974-03-01), Redlich et al.
patent: 3963860 (1976-06-01), Burrus
patent: 4233621 (1980-11-01), Yamagiwa et al.
patent: 4419698 (1983-12-01), Shiraishi et al.
patent: 4425584 (1984-01-01), Hirota et al.
"Video Signal Process of 4-Hour VHS VTR" by Hiroshi Taniguchi, National Technical Report, vol. 25, No. 1, Feb. 1979, pp. 70-81.
Faber Alan
Mitsubishi Denki & Kabushiki Kaisha
Young W. R.
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