Apparatus for reproducing a video signal of one system with conv

Details Apparatus for reproducing a video signal of one system with conv Apparatus for reproducing a video signal of one system with conv

1979-01-23

1982-08-24

Canney, Vincent P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 11, 358140, 360 9, 360 33, 360 73, 360 75, 360 84, H04N 578

Patent

active

043463975

ABSTRACT:
A reproducing apparatus reproduces a video signal of a certain system having a field frequency F1 and a number N1 of horizontal scanning lines within one field period which has been recorded on a magnetic tape travelling at a speed S1 along plurality tracks formed obliquely relative to the longitudinal direction of the tape and mutually parallel, converting the video signal to a video signal of another system having a field frequency F2 and a number N2 of horizontal scanning lines. The reproducing apparatus comprises a means for causing the tape to travel at a speed S2 which is represented by the equation S2=(F2/F1)S1, and a means for causing the rotary heads to trace each track on the travelling magnetic tape thereby utilizing a signal over tracing range of a length l2 substantially as a reproduced signal corresponding to unit field amount, the length l2 being represented by the equation l2=(N2/N1)l1, wherein l1 is the length of the recording track corresponding to unit field amount of the recorded signal on the magnetic tape.

REFERENCES:
patent: 3029306 (1962-04-01), Dolby
patent: 3157738 (1964-11-01), Okamura
patent: 3197559 (1965-07-01), Kihara
patent: 3662101 (1972-05-01), Segerstrom
patent: 3845237 (1974-10-01), Kanakawa
patent: 3869709 (1975-03-01), Yamagishi
patent: 3893169 (1975-07-01), Hall
patent: 4120007 (1978-10-01), Sata
patent: 4148077 (1979-04-01), Bragas
patent: 4213143 (1980-07-01), Jones

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